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Technical Design Parameters and Selection of Mining Mixing Tank
In the construction of mineral processing plants, the selection of a Mining Mixing Tank directly affects the execution of the chemical regime. Selection must balance volume with power and agitation intensity.
Core Technical Parameters
The following table outlines the typical parameter ranges for a standard Mining Mixing Tank in conventional mineral processing circuits:
| Parameter | Technical Specification | Remarks |
| Effective Volume | 0.5 – 50 cubic meters | Determined by slurry flow and residence time |
| Impeller Diameter | 250 – 1500 mm | Ratio to tank diameter is typically 1:3 to 1:4 |
| Impeller Speed | 150 – 450 r/min | Small impellers use high speeds; large use low |
| Motor Power | 1.1 – 55 kW | Depends on slurry specific gravity and resistance |
| Slurry Concentration | Up to 45% – 50% | Higher concentration requires more torque |
| Processing Capacity | 2 – 800 cubic meters/hour | Based on single tank overflow rate |
Sizing and Calculation Logic
To ensure the Mining Mixing Tank provides sufficient reaction time for chemicals, the following calculation logic is applied:
Residence Time Requirement: Different minerals require different contact times with collectors or activators. Generally, non-ferrous metal flotation requires a residence time of 3 to 7 minutes, while complex ores may require over 10 minutes.
Volume Calculation: The effective volume is calculated based on the slurry flow rate (cubic meters per minute) multiplied by the required residence time.
Power Intensity: The agitation intensity is measured by power per unit volume (kW/m3). For standard mineral conditioning, this is usually maintained between 0.5 and 1.5 kW/m3.
Comparison of Impeller Materials and Durability
The impeller is the most frequently replaced component in a Mining Mixing Tank. Choosing the right material is critical for operational uptime.
| Material Type | Wear Resistance | Corrosion Resistance | Best Use Case |
| High Manganese Steel | High | Low | Large particle size, neutral pH slurry |
| Natural Wear-Resistant Rubber | Excellent | Medium | High-abrasion fine ore particles |
| Polyurethane (PU) | High | High | Fine slurry with chemical corrosivity |
| Stainless Steel | Medium | Excellent | Highly acidic or alkaline chemical mixing |
Installation and Operational Layout
The positioning of the Mining Mixing Tank must follow specific spatial logic:
Gravity Flow Advantage: Whenever possible, the tank is installed at a higher elevation than the flotation cells to allow for gravity feeding, reducing the need for slurry pumps.
Sequential Arrangement: In complex chemical regimes, multiple Mining Mixing Tanks are used in series. This prevents "short-circuiting" (where chemicals bypass the ore) and ensures a step-by-step chemical reaction.
Dead Zone Prevention: The circular design of the tank prevents the accumulation of solids in corners, a common issue in square-bottomed containers.
FAQ: Technical Troubleshooting
Q: What causes the Mining Mixing Tank to overflow unexpectedly?
A: This is usually caused by a blockage in the discharge pipe or a sudden increase in the air content of the slurry (frothing), which increases the apparent volume beyond the tank's capacity.
Q: Can the Mining Mixing Tank be used for high-density thickening?
A: No. Its purpose is high-energy mixing, not settling. Using it for thickening would lead to excessive power consumption and would likely damage the motor due to the high torque required to move settled solids.
Q: How do I reduce the power consumption of the Mining Mixing Tank?
A: Adjusting the impeller pitch or reducing the speed via the V-belt pulley can lower power usage, but this must be balanced against the risk of ore sedimentation.
Q: Why is a "Stator" necessary in high-speed tanks?
A: The stator converts the swirling, turbulent energy into steady vertical circulation. Without a stator, the slurry would simply spin in a vortex, which is inefficient for mixing and can cause mechanical strain on the shaft.
