Gravity separating equipment and method for coarse slime

Abstract

The invention relates to gravity separating equipment and method for coarse slime, and is suitable for being used in the technical field of coal separating. The gravity separating equipment comprisesa spiral generating device; a spiral separating device is arranged above the spiral generating device; during the movement of particles different in density in a spiral chute, excitation torque arounda vertical axis is generated by an exciter of a spiral mean axis support; by the excitation torque around the vertical axis, the radial centrifugal force of a material is enhanced, the inward friction of the surface of the chute on the bottom layer of the material is increased, the interlayer repulsive force of the material is enhanced, and density-dominant distribution of the material is intensified; and meanwhile, a groove along an upper spiral line is formed in the surface of the spiral chute, and depth in the chute is gradually deepened from inside to outside in a radial direction, and thereby, segregation layering of the material is intensified by the velocity component of generated water flow, so that light particles straying into the bottom of the chute and heavy particles strayinginto the edge of the chute are layered and zoned again, and therefore, gangue and clean coal are separated, and the separating accuracy is increased.

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] During 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 ...

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 sheet-packed ore particles is poor. The liquid-solid fluidized bed separator has narrow requirements 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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