1.What factors affect the particle size of ore dressing ball mill discharge?
The factors that affect the fineness of grinding include: hardness of the original ore, size of the crushed particle size, sieve holes, feed amount, ball mill model, number of steel balls, size ratio of steel balls, wear of ball mill liner, speed of ball mill, speed of classifier, lifting height of classifier main shaft, wear of classifier blades, height of classifier overflow weir, height of classifier lower opening, size of classifier lower opening, height of classifier upper opening, size of classifier upper opening, water flow at the return sand place, water supply of ball mill, flushing water size at the discharge port of ball mill, etc.
2.The material input size into ore dressing ball mill ?
Hardness of raw ore: Different ores have different hardnesses. This factor is fixed relative to the same ore and cannot be adjusted. However, in production, under the premise of the requirements of mineral processing technology, reasonable ore blending can be carried out to make the ore size as uniform as possible, and the ratio of block and powder ore is reasonable and stable. In addition, at the belt feeding point of the ball mill, the belt may leak ore due to long-term wear. In most cases, the leaked ore is powder ore. This part of the leaked ore must be added to the ball mill as promptly as possible. If it is piled up for a long time and added in a concentrated manner, it will cause uneven ball mill feeding and cause unstable production. Especially for difficult ore dressing, the properties of powder minerals and block minerals are often different.
3.what is output size of ore dressing ball mill ?
Basic range: In most cases, the beneficiation ball mill can grind the material to 0.074–0.45 mm (40–200 mesh).
Fine grinding limit: Some equipment can reach micron level (1–10 microns) or submicron level (<200 nanometers) by optimizing design (such as wet overflow type) and adjusting parameters.
4.Typical grinding fineness of different ores comes out of ore dressing ball mill ?
Ore type Particle size requirement (mesh) Corresponding millimeter range Application scenario
Gold ore 200–400 mesh 0.074–0.038 mm Improve gold recovery rate
Copper ore 200–325 mesh 0.074–0.045 mm Flotation process requirements
Iron ore 100–200 mesh 0.15–0.074 mm Conventional beneficiation process
Lead-zinc/nickel ore 200–325 mesh 0.074–0.045 mm Meet flotation or leaching requirements
5. Key factors affecting particle size from ore dressing ball mill
Grate ball mill : Suitable for medium-coarse grinding, the output particle size is relatively coarse .
Overflow ball mill : Better fine grinding effect, suitable for micron-level grinding .
Adjustment of operating parameters
Speed: Increasing the speed can enhance grinding efficiency, but energy consumption and wear need to be balanced.
Grinding media: Small-sized steel balls or ceramic balls are easier to obtain fine particles.
Feed speed: Reducing the feed speed can extend the grinding time and improve the fineness.
6.Ore characteristics
Ores with high hardness (such as anthracite) require longer grinding time and higher energy consumption.
The smaller the feed particle size, the finer the final output, and the processing efficiency is improved.
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