Same as other mineral processing . The particle size of the coarsely ground product has a great influence on the processing capacity of the ball mill . The law of production statistics of Claymax is shown in the figure below.
Figure Roughness and processing capacity
(Ore Bonds Grindability Index 10~13 65 mesh)
Obviously, the coarse grinding grain size can increase the processing capacity of the plant. LUANCHUAN molybdenum 1983. After the coarse particle discharge from the crude 62.35% to 55.76% -200 mesh -200 mesh, ore dressing plant processing capacity increased by 20%, the production cost is reduced by about 5%.
When roughing the fineness of the grinding, attention should be paid to the "quality" of the coarse grinding - a reasonable particle size composition. JINDUICHENG molybdenum processing plant using kerosene as collector during the recovery of molybdenite in various size shown in the following table. Obviously too thick or too fine is unfavorable for crude molybdenum recovery, especially the +0.2mm (+80 mesh) grade molybdenum ore recovery is very low, only 68.3%. Therefore, the coarse grinding product should have a small particle size and a large amount in the middle.
Table-level recovery rate of rough selection section of Jinjincheng City
Size (mm) | -0.034 | -0.066+0.034 | -0.10+0.066 | -0.15+0.10 | -0.20+0.15 | +0.20 |
Molybdenum recovery rate (%) | 90.35 | 92.1 | 85.48 | 79.91 | 75.19 | 68.3 |
Jinduicheng used kerosene or diesel + Syntex to capture molybdenum ore. It was found that with different collectors, the grades of molybdenum in coarse-grained products are similar, but the recovery rate of molybdenum varies greatly. The choice of a strong collector is conducive to rough grinding of molybdenum ore.
Practice has proved that for molybdenum ore and molybdenum ore, as long as reasonable rough grinding, the selection of strong collectors for coarse selection can not affect the recovery rate of molybdenum, but also greatly improve the processing capacity of the plant. Reduce energy consumption and costs, and improve the economic efficiency of enterprises.
Although coarse roughing can abandon a large number of qualified coarse tailings, a high recovery crude concentrate can be obtained. However, the concentrate at this time is a molybdenum product containing a large number of continuums and even a poor body.
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