Liquid-solid fluidizing bed coarse slime sorting system of three products and process of system

Abstract

The invention discloses a liquid-solid fluidizing bed coarse slime sorting system of three products and a process of the system. An object screened out by a desliming screen enters a classified cyclone device, a bottom stream of the classified cyclone device enters a liquid-solid fluidizing bed coarse slime sorting machine of the three products for sorting, refined coal slime, tail coal slime andintermediate coal slime are generated after sorting, dewatering of the intermediate coal slime is completed through an intermediate coal slime sieve, an object screened out by the intermediate coal slime sieve enters a medium combining barrel, and a material in the medium combining barrel is pumped into a heavy medium cyclone device for sorting. By means of the process, the coarse coal slime whichis difficult to sort can be sorted, and meanwhile, the feeding grain size range can be expanded. The problem that the quality of the refined coal slime and tail coal slime in existing coarse coal slime sorting processes cannot be ensured at the same time is solved, and by pumping the intermediate coal slime into the heavy medium cyclone device with high sorting precision for resorting, the recovery rate of refined coal is increased.

Description

technical field [0001] The invention relates to a three-product liquid-solid fluidized bed sorting coarse coal slime system and its technology, and is especially suitable for desulfurization and ash reduction of difficult-to-separate coarse coal slime in the coal sorting process. Background technique [0002] my country is a country where coal is the main energy source. Coal separation is the most effective measure for clean and efficient utilization of coal. Coal preparation processes and methods have gradually matured and improved, forming the "large-diameter dense medium cyclone separation + coarse coal The three-stage mainstream process of mud separation + flotation. However, the lower limit of the separation particle size of the large-diameter dense medium cyclone is high (greater than 1mm), and the upper limit of the suitable particle size for flotation is about 0.25mm, which makes the separation of coarse coal slime very necessary. In the coarse coal slime separation ...

AI Technical Summary

Problems solved by technology

[0003] Technical problem: The purpose of the present invention is to solve the problem that the coarse coal slime feeding particle size range is narrow, and when the coarse coal slime is difficult to sort, the clean coal ash and gangue ash cannot be guaranteed at the same time and the sorting efficiency is low. The product liquid-solid fluidized bed sorting coarse coal slime system and process, this sorting process can relax the feed particle size range when sorting coarse coal slime, especially suitable for the separation of difficult coarse coal slime, and can ensure clean coal at the same time ash and gangue ash, and has a relatively high recovery rate

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