A kind of coarse coal slime gravity separation equipment and method

Abstract

The invention relates to a coarse coal slime gravity separation device and method, which are suitable for use in the technical field of coal separation. It includes a spiral generating device, and a spiral sorting device is arranged above the spiral generating device; during the movement of the spiral chute with particles of different densities, the vibration exciter of the spiral central axis support generates an excitation moment around the vertical axis, and the vibration around the vertical axis The torque enhances the radial centrifugal force of the material, increases the inward friction of the chute facing the bottom layer of the material, enhances the interlayer repulsion of the material, and strengthens the distribution of the material according to the density. At the same time, there is a groove along the upper spiral line on the surface of the spiral chute, and the inner depth of the groove gradually deepens radially from the inside to the outside. The light particles and the heavy particles strayed into the edge of the groove are re-layered and separated, so as to realize the separation of gangue and clean coal, and improve the separation accuracy.

Description

technical field [0001] The invention relates to a coarse coal slime gravity separation device and method, in particular to the coarse coal slime gravity separation device and method used in the technical field of coal separation. Background technique [0002] In the whole process of coal separation, the particle size of coarse coal slime is between the lower limit of dense medium separation and the upper limit of flotation (2-0.3mm). Precision sorting. Therefore, coarse coal slime is generally separated separately, and its separation process also plays a decisive role in the entire coal separation process. The quality of its separation effect is directly related to the efficiency of dense medium separation and slime water treatment. . The large-scale application of large-diameter dense medium cyclones and fine-grained coal treatment equipment not only improves product quality and separation effect, but also reduces the separation of coarse coal slime near the junction of g...

AI Technical Summary

Problems solved by technology

[0004] The existing coarse slime separation equipment has been widely used, such as disturbed bed separator (TBS), spiral separator, slime dense medium cyclone, etc., but it also exists in the process of sorting coarse slime More or less shortcomings restrict the improvement of sorting accuracy

The parameters of the spiral separator are not easy to adjust to adapt to the change of the feed material properties, the separation density is high, and the enrichment effect on the flaky ore particles is poor. The liquid-solid fluidized bed separator has a narrow requirement for the particle size range of the feed material. The separation density is low, and the slime dense medium cyclone needs to set up a separate set of fine medium circulation and recovery system, the system design is relatively complicated, the recovery of ultrafine medium is difficult, and the production cost is high

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