The role of classifying equipment in ore refining process

Importance of Classifying Equipment

In modern mining production, with the increasing depletion of mineral resources and the continuous decline in ore quality, how to improve the processing efficiency and refining quality of ore has become an important issue facing mining companies. In this context, as one of the core equipment in the ore processing process, classifying equipment plays a vital role. It not only plays a key role in the ore classification process, but also makes great contributions in ore washing, desliming, and sorting of fine-grained minerals.

Classifying equipment is widely used in the processing of various ores, especially in the ore refining process, it provides a reliable technical guarantee for improving the recovery rate and resource utilization of ore. Classifying equipment enables ore to be effectively separated through classification and washing, thereby improving the grade of concentrate, reducing the impact of impurities, and ultimately improving the processing efficiency and product quality of ore.

The core role of classifying equipment in ore processing

The main function of classifying equipment is to separate fine particles from coarse particles in the ore slurry by sedimentation sorting according to the size and specific gravity of the particles in the ore slurry. Its working principle is based on the fact that the speed at which particles settle in liquid is closely related to the physical properties of the particles, such as particle size and density. Smaller particles will be taken to the overflow port for discharge due to their slow settling speed, while larger particles will settle to the bottom of the water tank and be taken to the outlet through a spiral device. In this way, classifying equipment can achieve accurate particle classification during ore processing.

In the process of ore refining, fine-grained minerals are often difficult to separate from coarse particles, so higher requirements are placed on equipment. Classifying equipment is an effective tool to solve this problem. It can effectively separate coarse and fine particles in the ore, send the coarse particles back to the mill for re-grinding, and the fine particles enter the next process through overflow. Through the action of classifying equipment, the grade of the concentrate has been improved, the content of impurities has been reduced, and the refined ore is purer, meeting the requirements of downstream processes.

Application of classifying equipment in ore washing

In the process of ore washing, the classifying equipment removes unnecessary substances such as mud, impurities, etc. in the ore sand through a continuously rotating spiral device, thereby achieving the sorting and desludging of the ore sand. Especially when dealing with ores containing a large amount of clay or fine-grained materials, the washing function of classification equipment is particularly important. It can effectively remove the soil and fine impurities in the ore sand, ensuring the quality and accuracy of the ore in the subsequent process.

After the initial crushing of the ore, there are usually a large number of fine mineral particles mixed in the ore sand. Through the treatment of classification equipment, these particles will be effectively separated by sedimentation and classification, which not only improves the purity of the ore, but also reduces unnecessary energy consumption in the subsequent refining process. Especially when dealing with some special minerals, such as iron ore, copper ore, etc., the washing function of classification equipment can help remove impurities, improve the utilization rate of ore, and lay a solid foundation for subsequent smelting processes.

Improve production efficiency and economic benefits

The application of classification equipment has greatly improved the automation and refinement level of ore processing, reduced the complexity of manual operation, and reduced the possibility of human error. With the continuous development of classification equipment technology, the efficiency of equipment is also continuously improving. Modern classification equipment not only has higher classification accuracy, but also can complete more ore processing work in a shorter time, thereby improving overall production efficiency.

Classifying equipment can help mining companies save energy and reduce production costs. In the process of ore processing, accurate classification can reduce the recovery and ineffective treatment of unqualified minerals, avoiding the waste of a large amount of ineffective materials. At the same time, through the improvement of concentrate recovery rate, the overall utilization rate of ore has also been enhanced, thus bringing better economic benefits to mining companies.

An indispensable tool in ore refining

Ore refining is a complex and highly precision-dependent process. In order to ensure the quality of the final product and the efficient use of ore, accurate sorting must be implemented in multiple links. As a key link in the refining process, classifying equipment can not only efficiently separate fine particles in the ore, but also distribute minerals of different particle sizes to different process flows, thereby ensuring that various requirements in the refining process are met. Whether it is the improvement of concentrate grade or the reduction of waste, classifying equipment provides reliable technical support for the ore refining process.

Basic structure of classifying equipment

Classifying equipment is a kind of equipment widely used in the process of ore processing, mainly used for the classification, washing and desludging of ore pulp. Its structure is relatively simple, but it has efficient working performance and relatively stable operation characteristics. The basic structure of classifying equipment mainly consists of the following parts: semicircular water tank, spiral device, bearing part, transmission device, discharge port and overflow port, etc. Each part plays a vital role in the normal operation of the equipment.

Semicircular water tank

The semicircular water tank is one of the core parts of the classifying equipment, usually made of high-quality steel plate or wear-resistant material. Its shape is semicircular or trapezoidal, with a deep bottom, which is used to hold the ore pulp and carry out sedimentation and classification. The main function of the water tank is to provide a sedimentation space for the ore pulp, and with the help of the buoyancy and gravity of the water flow, the minerals of different particle sizes in the ore pulp are layered and settled. In the water tank, fine mineral particles settle slowly, while heavy mineral particles settle quickly. The design size and structure of the water tank determine the fluidity and classification effect of the ore pulp, and affect the processing capacity and classification accuracy of the classifier.

The inclination angle of the water tank has a direct impact on the performance of the classifying equipment. Generally, the water tank angle of the classifying equipment is designed between 10° and 20° to ensure that the slurry can complete sedimentation and classification in a short time. If the angle is too large, the flow speed of the slurry is too fast, which may easily lead to inaccurate classification; if the angle is too small, it may affect the classification efficiency.

Spiral device

The spiral device is one of the core working parts of the classifying equipment, usually composed of spiral blades, shafts and other auxiliary components. The spiral device is located inside the water tank, usually installed at the bottom of the water tank, and driven to rotate by an electric motor. The main function of the spiral is to push the particles in the slurry to flow in a certain direction, so that the coarser mineral particles are deposited to the bottom and brought to the discharge port through the spiral device, while the finer mineral particles will be brought to the overflow port due to the slow flow rate.

The design of the spiral blade is crucial to the classification effect. The pitch, shape, thickness and material of the spiral blade determine the sorting effect of minerals of different particle sizes in the slurry. The spiral device is usually made of strong and wear-resistant metal materials to ensure that it is not easily damaged during long-term operation. With the continuous advancement of technology, the design of the spiral device has been continuously optimized, which not only improves the classification efficiency but also extends the service life of the equipment.

Bearing part

The bearing part is an important supporting part of the classifying equipment, which mainly bears the support and rotation drive of the spiral device. The spiral device is connected to the machine body through the bearing, and the slurry is classified by the rotation of the bearing. The bearing is usually made of wear-resistant and high-strength materials, which can withstand the large load from the spiral device and ensure that the equipment can run smoothly in long-term operation.

The bearing part is generally located at both ends of the water tank to ensure that the spiral device can rotate smoothly. For some large-scale classifying equipment, the bearings also need to withstand higher loads, so their materials and structural design need to be paid special attention. In order to avoid excessive wear of the bearings, a lubrication system is usually equipped to keep the bearings running smoothly and extend their service life.

Transmission device

The transmission device is the power source of the classifying equipment, which is usually composed of a motor, a belt, a reducer and a coupling. The motor provides driving force, and after the reduction transmission of the reducer, the power is finally transmitted to the spiral device through the belt to rotate it. The design of the transmission device needs to ensure the smooth transmission of power to avoid equipment failure due to transmission failure.

In the classifying equipment, the power and speed of the transmission device have an important influence on the classification effect. The transmission device needs to be adjusted according to the different ore properties and classification requirements to ensure that the speed of the spiral device is moderate, which can not only drive the slurry flow, but also will not affect the sedimentation and classification of the minerals. In addition, the transmission device also needs to have good anti-interference ability to cope with the load fluctuations that may be encountered during the slurry processing.

Discharge port and overflow port

The discharge port and overflow port are two important outlets of the classifying equipment, which are used to separate coarse particles and fine particles in the slurry respectively. At the bottom of the water tank, there is a discharge port for discharging coarse particles of minerals transported by the spiral device. After re-grinding and other treatments, these coarse particles can finally extract the useful components in the minerals.

The overflow port is located at the upper part of the water tank, which is used to discharge finer particles of minerals. Because of their slow sedimentation speed in the slurry, they will eventually flow out of the classifying equipment with the water flow and enter the subsequent processing steps. By accurately designing the position and size of the overflow port, the classifying equipment can effectively control the discharge of fine particles and ensure the accuracy of the classification effect.

Other auxiliary devices

In addition to the main components, the classifying equipment also includes some auxiliary devices, such as feed port, regulating valve, cleaning system, etc. Although these devices seem simple, they play a vital role in actual operation. For example, the feed port is responsible for delivering slurry to the classifying equipment, the regulating valve is used to control the flow of slurry, and the cleaning system helps clean the sediment in the spiral device and the water tank to ensure long-term and stable operation of the equipment.

Working principle of classifying equipment

As an important ore classification equipment, classifying equipment is widely used in multiple links such as ore classification, washing and desludging. Its core function is to classify the ore pulp through the difference in the settling speed of different particles in the ore pulp, accurately separate the coarse and fine particles, and thus provide qualified raw materials for subsequent smelting, mineral processing and other processes. The working principle of classifying equipment is relatively simple, but through efficient mechanical movement and fluid mechanics principles, it can complete accurate ore sorting.

Input and sedimentation classification of ore pulp

The working process of classifying equipment starts with the input of ore pulp. The ore pulp is usually a mixture of ore materials and water after preliminary crushing and grinding, with particles of different particle sizes. In the classifying equipment, the ore pulp enters the water tank through the feed port. The bottom of the water tank is the sedimentation area of ​​the ore pulp, where the ore pulp begins to settle in layers. Due to the different density and size of particles in the slurry, the sedimentation speed of different particles is also different. Larger and heavier particles will quickly settle to the bottom due to their faster sedimentation speed; while smaller and lighter particles settle slowly and remain suspended in the upper liquid.

At this time, the spiral device comes into play. The classifying equipment is equipped with a spiral device made of steel material. The rotation direction and speed of the spiral blade play a decisive role in the classification effect of the slurry. The spiral device is generally installed at an angle at the bottom of the water tank. By slowly rotating, it drives the particles in the slurry to move along the sedimentation area at the bottom of the water tank to the discharge port. The particles in the slurry gradually stratify and settle according to the size and density of the particles.

The role of the spiral device

The core component of the classifying equipment is the spiral device, which consists of spiral blades and a main shaft. Its main function is to push the coarse particles in the slurry to the discharge port and the fine particles to the overflow port. The rotation of the spiral device generates a continuous liquid flow in the slurry. The fine particles in the slurry have a small specific gravity and a slow sedimentation rate, and they are easy to flow to the overflow port above the water tank with the water flow. However, due to their large specific gravity and fast sedimentation rate, the coarse particles will be brought to the bottom of the water tank by the spiral device and discharged to the discharge port after being pushed by the spiral.

The design of the spiral blade has a great influence on the classification effect. The pitch, thickness and shape design of the blade determine the flow rate of the slurry and the classification efficiency of the particles. Usually, the shape and pitch size of the spiral blade should be adjusted according to the particle size of the slurry to be processed and the properties of the ore to ensure that the particles can be effectively sorted in the water tank.

Separation of coarse and fine particles in the slurry

As the spiral device rotates, the coarse particles (mineral particles larger than a certain size) in the slurry gradually settle to the bottom of the water tank due to their fast sedimentation rate, and are pushed to the discharge port by the spiral blade, which is called "return sand" or "coarse sand". These coarse particles need to be returned to the mill for further grinding so as to be refined to a particle size suitable for the next step of mineral processing or smelting. One of the functions of the classification equipment is to effectively return these large particles to the grinding process, thereby avoiding excessive energy waste and improving the utilization rate of materials.

Compared with coarse particles, fine particles (usually particles smaller than 100 mesh or even smaller) usually do not settle quickly to the bottom due to their slow settling speed, but flow to the overflow port with the water flow. These fine particles will enter the overflow area and be discharged through the overflow port. The separation effect of fine particles is particularly important for ore refining, because the finer mineral particles in the ore often contain more useful components. If they can be accurately separated, the grade and recovery rate of the ore will be effectively improved.

Separation of overflow and discharge

The design of the classification equipment enables coarse particles and fine particles to be effectively separated in the same equipment. After the slurry is settled and classified, the fine particles overflow through the overflow port and enter the next processing link, usually flotation, gravity separation and other mineral processing processes. The coarse particles are brought to the bottom of the water tank by the spiral device, discharged through the discharge port, and sent back to the mill for re-grinding.

During the operation, the design of the overflow port and the discharge port is crucial. The height of the overflow port and the position of the discharge port must be precisely adjusted according to the properties of the slurry, the particle size distribution, and the production requirements. By adjusting the height of the overflow port, the discharge amount of fine particles in the slurry can be controlled, thereby accurately controlling the classification accuracy.

Relationship between rotation speed and classification accuracy

The rotation speed of the classification equipment is closely related to the classification effect. A slower rotation speed can ensure that the particles are fully settled, the fine particles can effectively overflow through the overflow port, and the coarse particles can be accurately pushed to the discharge port; but if the rotation speed is too fast, the fine particles will be mistakenly discharged and the classification will be inaccurate. Usually, the rotation speed of the classification equipment is controlled within a certain range to ensure the best balance of the classification effect.

Closed-loop working mode of the classification equipment

Classifying equipment usually forms a closed-loop cycle with the mill. In this cycle, the role of the classifying equipment is to classify the ore pulp after grinding, send the coarse particles back to the grinding machine for re-grinding, and send the fine particles to the next beneficiation process. In this way, the coordinated work of the classifying equipment and the grinding machine can avoid over-grinding and improve the efficiency of the entire ore processing process.

The core function of classification equipment in ore refining

Classification equipment plays a vital role in the ore refining process, especially in the classification of fine-grained ore, ore sand desludging, mineral separation, etc., which are indispensable core tools for ore processing. The ore refining process involves multiple process links, and the main goal is to improve the grade of the ore and remove unnecessary impurities in order to obtain high-purity concentrate. And classification equipment, through its unique classification function, not only improves the efficiency of ore refining, but also effectively improves the quality of the ore, laying a solid foundation for subsequent smelting and beneficiation processes.

Classification of fine-grained ore

In ore refining, the classification of fine-grained ore is a crucial link. In the traditional grinding process, the ore is ground into fine particles, which usually forms a slurry mixed with fine-grained minerals and coarse-grained minerals. The fine-grained minerals in these slurries are often difficult to be effectively separated. If they cannot be accurately classified, it will directly affect the subsequent beneficiation and smelting efficiency.

Classification equipment is the key equipment to solve this problem. Through the rotation of the spiral device, the fine particles in the slurry will be carried to the overflow port above the water tank due to their slow settling speed. The coarse particles are pushed to the discharge port at the bottom of the water tank by the spiral blades due to their fast settling speed. In this way, the classification equipment can effectively separate the fine particles from the coarse particles, ensuring the accuracy and quality of the fine particles when entering the subsequent processing link.

When processing slurry containing more fine particles, the classification equipment can effectively discharge the fine particles according to the different settling speeds of the particles, thereby reducing the impact of fine minerals on subsequent beneficiation and ensuring the improvement of the concentrate grade. This function plays a vital role in the sorting and recovery of fine minerals.

Ore sand desludging and impurity removal

In the refining process of many ores, the ore is often accompanied by a large amount of mud, clay and other fine impurities, which will seriously affect the quality of the concentrate. Classification equipment not only plays a role in the classification of slurry, but also can effectively desludging ore sand. Through its rotating spiral device, the fine sand and impurities in the slurry are brought to the upper part of the water tank and finally discharged through the overflow port, thereby achieving the purpose of removing impurities.

For example, when processing ore containing clay, the classification equipment can effectively remove the mud and fine impurities in the slurry by separating fine particles from sand, making the minerals in the ore purer and providing clean slurry for subsequent mineral processing. This not only improves the grade of the ore, but also reduces the wear of the smelting furnace and equipment in the subsequent process, thereby reducing production costs.

Separation and effective recovery of minerals

There are many types of minerals in the ore, and the properties, particle size, specific gravity, etc. of each mineral vary greatly. In the refining process of the ore, the separation of different minerals is the key to improving the grade and recovery rate of the ore. The classification equipment can separate different minerals in the slurry according to the difference in the settling speed of the mineral particles in the slurry, ensuring the efficient recovery of the minerals.

For example, in the processing of copper, iron, lead and zinc ores, classification equipment can separate different mineral components according to the differences in particle size and sedimentation velocity of mineral particles. Through precise classification, classification equipment can effectively separate valuable minerals from waste materials, improve the recovery rate of ore and reduce smelting costs.

In practical applications, classification equipment is used in conjunction with mineral processing equipment such as flotation and gravity separation to achieve more efficient mineral separation. By effectively separating fine minerals from coarse minerals, classification equipment provides ore pulp that meets the requirements for subsequent flotation or gravity separation of ore, thereby greatly improving the separation effect of minerals.

Improve the fluidity and stability of ore pulp

In the process of ore refining, the fluidity and stability of ore pulp directly affect the sorting effect. Classification equipment can evenly distribute the particles in the ore pulp and maintain good fluidity of the ore pulp through its special spiral design. The rotation of the spiral blade drives the ore pulp to flow in a certain direction, which helps to effectively separate the particles and prevent uneven sedimentation or blockage.

In addition, the slurry flow rate of the classification equipment in the water tank is adjustable, and the operator can adjust the working parameters of the equipment according to the concentration and particle size of the slurry, so as to achieve the best classification effect. This flexibility allows the classification equipment to adapt to the processing needs of different ore types, providing a larger operating space for ore refining.

Improve production efficiency and economic benefits

The efficient classification function of the classification equipment directly improves the production efficiency of ore processing. Through precise classification, the classification equipment can not only improve the processing capacity of the slurry, but also reduce the accumulation of useless substances in the ore, thereby saving energy and resources. The classification equipment improves the grade of the concentrate by efficiently removing impurities, reduces the consumption of ore during the smelting process, and improves the recovery rate of the concentrate.

In addition, the application of classification equipment in ore sand desludging, fine-grained ore classification, etc., reduces the need for secondary processing of ore in subsequent processes, making the entire ore refining process more efficient, thereby reducing production costs. The efficient sorting of ore also enables mining companies to better control the production process and improve economic benefits.

Environmental protection and sustainable development

The application of classification equipment in ore refining also contributes to environmental protection. By effectively removing the sand and impurities in the ore pulp, classification equipment reduces waste emissions and reduces environmental pollution. Harmful components in the ore are effectively isolated during the classification process, reducing unnecessary waste generation, which meets the environmental protection requirements of modern mining.

With the mining industry's attention to sustainable development, classification equipment has gradually become an environmentally friendly equipment in ore refining with its efficient sorting ability and low energy consumption characteristics. It not only improves the recovery rate of ore, reduces production costs, but also reduces the negative impact on the environment.

Closed-circuit coordination between classifying equipment and grinding mill

In the ore refining process, the coordination between classifying equipment and grinding mill is very critical. Together, they form a closed-circuit system and form an effective ore processing process. Closed-circuit coordination can not only improve the ore processing efficiency, but also ensure the particle size control of the ore, thereby achieving the best sorting effect. By returning the coarse particles to the grinding mill for re-grinding, the synergy between the classifying equipment and the grinding mill achieves efficient ore classification and reprocessing, making the ore refining process more efficient and stable, and significantly improving the ore grade and recovery rate.

Working principle of closed-circuit system

A closed-circuit system means that during the ore processing process, the ore pulp that has undergone preliminary grinding will be classified by the classifying equipment to separate the fine particles from the coarse particles. The fine particles overflow through the overflow port into the downstream beneficiation process, while the coarse particles are sent back to the grinding mill for further grinding. This "coarse particle return" mechanism ensures that the coarse particles in the slurry are fully ground so that they can meet the particle size requirements of the subsequent beneficiation process.

Specifically, the closed-loop coordination usually consists of the following links:

Grinding machine: preliminary grinding of ore, grinding ore particles to a certain fineness.

Classifying equipment: classifying the slurry after grinding, separating fine particles from coarse particles.

Coarse particles return to the grinding machine: the coarse particles (return sand) separated by the classifier are sent back to the grinding machine for re-grinding until they reach a particle size suitable for beneficiation.

Fine particles enter the downstream beneficiation link: fine particles enter the downstream beneficiation process, such as flotation, gravity separation, etc., through the overflow port.

The advantage of this closed-loop system is that the coarse particles in the slurry can be ground multiple times, which effectively improves the recovery rate and quality of the concentrate.

Synergy between classifying equipment and grinding mill

Classifying equipment and grinding mill do not operate independently in a closed-loop system. They cooperate with each other to form a complete circulation system. The synergy is mainly reflected in the following aspects:

Precise classification and particle size control: The grinding mill is responsible for grinding the ore particles into appropriate fineness, but due to the difference in the size of mineral particles in the slurry, some coarse particles may not be completely ground. Classifying equipment effectively separates coarse particles from fine particles in the slurry through its rotating spiral blades, ensuring that fine particles can enter the downstream beneficiation link, while coarse particles are sent back to the grinding mill for re-grinding. This classification function ensures that minerals of different particle sizes in the ore can be accurately processed and that the particle size distribution of the ore is suitable for subsequent processes.

Improve grinding efficiency: In a closed-loop system, the classifying equipment plays the role of returning coarse particles to the grinding mill. In this way, the grinding mill can focus more on re-grinding coarse particles that have not been completely ground, thereby improving the efficiency of grinding. By recycling the mill, overloading or uneven treatment of the mill is avoided, allowing it to operate more efficiently.

Reduce over-grinding: After the classifying equipment classifies the slurry, fine particles will be discharged in time and will not enter the mill. This effectively avoids the phenomenon of over-grinding of fine particles by the mill, because fine particles may be too fine after being ground in the mill for a long time, thus wasting energy. Therefore, the classifying equipment effectively avoids "over-grinding" through precise classification, helping to maintain the appropriate particle size requirements.

Improve ore grade and recovery rate: Closed-circuit coordination ensures that the coarse particles in the slurry can be fully ground, thereby improving the recovery rate of the ore. By continuously sending the unground particles back to the mill for re-grinding, the classifying equipment and the mill work together to make the final concentrate grade higher and the recovery rate increase accordingly. The full grinding of coarse particles means that more useful minerals are released, which can ultimately improve the beneficiation effect of the ore.

Fine particle size control

In the ore refining process, particle size control is crucial because the particle size of the ore directly affects the effect of subsequent mineral processing and smelting. The fine classification of the classifying equipment in the closed-loop system enables the particles in the slurry to be accurately separated according to the particle size.

Treatment of fine-grained ore: For some finer minerals in the slurry, the classifying equipment discharges the fine minerals in time through the overflow port to ensure that they can enter the downstream mineral processing link. This operation helps to improve the efficiency of mineral processing and avoid excessive grinding of fine minerals.

Accurate regrinding of coarse-grained ore: For those coarse mineral particles, the classifying equipment will send them back to the mill for re-grinding, so as to ensure that these particles can be further refined to a particle size more suitable for mineral processing. This feedback mechanism effectively ensures that the coarse minerals are fully ground and improves the resource utilization of the entire system.

Production benefits of closed-loop coordination

The use of closed-loop systems makes the ore processing process more efficient. The collaboration between the classification equipment and the grinding mill not only improves production efficiency, but also achieves higher material recovery rate and lower energy consumption.

Save energy and reduce costs: Through reasonable closed-loop circulation, the grinding mill does not have to process too many fine particles, avoiding unnecessary grinding and reducing energy consumption. At the same time, the coarse particles are sent back to the grinding mill for re-grinding, which can maximize the utilization of resources and reduce the waste of raw materials.

Improve processing capacity: The closed-loop system can effectively improve the processing capacity of the entire ore processing system. The classification equipment improves the processing efficiency of the grinding mill through the classification function. With the precise return of coarse particles, the load of the grinding mill can be distributed, allowing the entire system to process more ore and improve the production capacity of ore processing.

Reduce equipment wear: Since the classification equipment effectively screens out coarse particles and sends them back to the grinding mill, the wear of the grinding mill is reduced. This is because the coarse particles in the slurry have been separated in advance before returning to the grinding mill, which reduces the workload of the grinding mill, thereby reducing the wear and failure rate of the equipment and extending the service life of the equipment.

Adjustment and optimization of closed-circuit system

The coordinated work of the classifying equipment and the grinding machine in the closed-circuit system requires precise adjustment. The operator can adjust the overflow height, spiral speed and other parameters of the classifying equipment to ensure that the system can operate stably under different loads and ore properties. In addition, the speed and grinding time of the grinding machine also need to be optimized according to the condition of the slurry. Only through continuous adjustment and optimization can the closed-circuit system perform at its best.

Advantages of Classifying Equipment in Fine-grained Mineral Sorting

In the ore refining process, the sorting of fine-grained minerals is a technical challenge. Due to the small particle size and slow sedimentation rate of mineral particles, the treatment effect of traditional mineral processing equipment is often poor. Classifying equipment, with its unique structural design and working principle, shows obvious advantages in the sorting of fine-grained minerals. It can efficiently separate fine particles, especially when processing fine-grained minerals in deep sedimentation areas, it can provide higher sorting accuracy, thereby effectively improving the mineral processing effect of ore.

Adapt to the sorting needs of fine-grained minerals

Fine-grained minerals occupy an important position in ore refining, and their particle size is usually less than 100 mesh, or even less than 200 mesh. Traditional mineral processing methods such as gravity separation and flotation have poor treatment effects on these fine-grained minerals, and the sorting is not accurate enough. Because the sedimentation rate of fine-grained minerals is slow and they are easily mixed with other minerals, it is difficult to effectively separate them by conventional physical methods.

Classifying equipment is an effective tool to solve this problem. Its spiral blades rotate in the water tank, driving the mineral particles in the slurry to be diverted and graded. Since the classification equipment is designed to separate the particles in the slurry through different settling speeds, it is particularly suitable for the sorting of fine-grained minerals. Due to their lower settling speed, fine-grained minerals can be fully processed and separated in the deep settling area of the classification equipment, thus avoiding the mixing of fine-grained minerals with coarse minerals.

Efficient processing capacity of deep settling area

One of the biggest advantages of the classification equipment is its deep settling area design, which makes it particularly suitable for processing fine-grained minerals. The settling area is the area where the slurry flows in the classification equipment, and the particles in the slurry will be separated in this area according to different settling speeds. The settling area of ​​the classification equipment is designed to be relatively wide, so that fine particles can settle in this area and be accurately sorted out.

In the process of sorting fine-grained minerals, the fine particles in the pulp usually cannot settle to the bottom in a short time due to their low settling velocity, which requires a larger settling area and a slower flow rate to ensure that the fine particles have enough time to settle. The classification equipment generates a stable water flow in the settling area through the rotation of its spiral device, ensuring that the fine particles can fully settle and be effectively separated. The design of the deep settling area not only improves the sorting accuracy of fine-grained minerals, but also ensures the stability during the sorting process.

Improvement of sorting accuracy

The sorting accuracy of fine-grained minerals is directly related to the refining effect of the ore. Classifying equipment can accurately separate fine-grained minerals from other minerals by diverting the pulp using the difference in settling velocity. Compared with traditional sorting equipment, classification equipment can separate fine-grained materials from coarse-grained materials in the pulp in a shorter time, thereby achieving more accurate sorting.

During the working process of the classification equipment, the particles in the pulp are separated according to their settling velocity and flow characteristics. Fine-grained minerals settle slowly and usually settle in areas with slow water flow, thus separating them from coarse particles with faster settling speed. This sorting method enables the classification equipment to achieve higher sorting accuracy, avoids cross-contamination of fine-grained minerals with other minerals during the sorting process, and ensures the purity of the ore.

Improve the processing capacity of slurry

Classifying equipment can not only efficiently sort fine-grained minerals, but also has strong processing capacity. In the ore refining process, the processing capacity of slurry is often an important indicator to measure the performance of equipment. Classifying equipment can classify a large amount of slurry in a short time through the continuous rotation of spiral blades, especially when processing fine-grained minerals, it can maintain a high sorting efficiency.

Due to the design of the classification equipment, the particles in the slurry can be diverted according to different settling speeds, which greatly improves its processing capacity. When sorting fine-grained minerals, the classification equipment can still ensure the sorting effect and sorting accuracy under a large slurry flow, thereby improving the overall ore processing efficiency.

Adjustable operating parameters

Classifying equipment has adjustable operating parameters, which can be flexibly adjusted according to the characteristics and processing requirements of different ores. This flexibility enables the classification equipment to adapt to the needs of mineral sorting of different particle sizes and densities. Especially when processing fine-grained minerals, the operator can optimize the sorting effect by adjusting the spiral speed, the depth of the water tank, the height of the overflow port and other parameters.

For example, when processing fine-grained minerals, the operator can appropriately adjust the depth of the water tank or the spiral speed to reduce the sedimentation rate of fine-grained minerals and make them more efficiently sorted. At the same time, the classification equipment can also adjust the flow rate of the slurry by changing the height of the overflow port to ensure that fine-grained minerals can flow out at the right time, while coarse particles can be effectively returned to the mill for re-grinding.

Efficient silt separation and ore sand desludging

During the ore refining process, the ore slurry often contains a large amount of silt and fine impurities, which will affect the grade of the ore and even affect the effect of subsequent mineral processing and smelting. Classifying equipment can effectively separate these fine particles and silt through its deep settling zone design.

Under the action of the classifying equipment, fine silt and mineral particles are brought to the upper part of the water tank and discharged through the overflow port. The larger mineral particles continue to settle to the bottom and are sent back to the mill for re-grinding through the spiral blades. Through this process, the classifying equipment can not only improve the grade of the ore, but also effectively remove the mud and impurities in the ore sand, ensuring the smooth progress of the subsequent mineral processing and smelting processes.

Energy saving and environmental protection

Compared with other traditional sorting equipment, the energy consumption of the classifying equipment is lower, especially when dealing with fine-grained minerals. It can efficiently complete the sorting process, reduce the need for over-grinding, and thus save energy. As the mining industry has higher and higher requirements for environmental protection and energy saving, the classifying equipment has become an indispensable equipment in ore refining with its high efficiency and energy saving characteristics.