Slough beneficiation is a method of making ore by using a stream of water flowing along a slope. After the slurry is given to the chute, the loose stratification and separation process of the different density of the ore is carried out under the combined action of the force of the water flow, the gravity of the ore (or centrifugal force), the friction of the ore and the bottom of the tank. The result of the stratification is that the densely-concentrated ore particles are concentrated in the lower layer, move forward along the bottom of the tank at a lower speed, and then exit the tank or deposit on the bottom of the tank to become a concentrate; the small-density ore particles are concentrated in the upper layer to The large speed is taken away by the current and becomes a tailings. Therefore, mineral particles of different nature can be selected by density in the tank, but the size and shape of the ore particles will affect the accuracy of sorting.
There are many types of chutes. According to the particle size of the treated ore, it can be divided into two categories: ore (greater than 74 microns) chute and slime (less than 74 microns) chute. Common chutes are shown in Table 3-4.
species | name | Effective sorting granularity Range 1 (mm) | Job nature | working condition | Method of operation |
Ore chute | Fan chute Cone concentrator Spiral concentrator | 2.5~0.037 2.5~0.037 2~0.037 | Rough, sweeping Rough, sweeping | continuous continuous | mechanical mechanical |
Mineral mud distillation tank | Uniform slot Spreading chute Spiral chute Belt chute Centrifugal concentrator Vibrating belt chute Mozley Turning Bed Cross flow belt chute | 0.074~0.027 0.074~0.027 0.074~0.030 0.074~0.010 0.074~0.010 0.074~0.020 0.074~0.010 0.074~0.01 | Rough, sweeping Rough, featured Rough, fine, sweeping Featured Rough, sweeping Rough, emotional, sweeping Rough, sweeping Featured | Intermittent Intermittent continuous continuous Intermittent continuous Intermittent continuous | Artificial Artificial mechanical mechanical mechanical mechanical mechanical mechanical |
1 Effective selection of particle size range is based on quartz particle size.
The ore chute is mainly used for the rough selection of gold , platinum , tin sand ore and other rare metals such as monazite and zircon . The slime chute is often used for the rough selection of tin, tungsten and rare metals, and the belt chute is dedicated to the selection.
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