A three-stage open-circuit combined separation process and system for coarse coal slime

Abstract

The invention discloses a three-stage opening compounding separation process and a three-stage opening compounding separation system for coarse slime and belongs to a separation process and a separation system for the coarse slime. The slime is classified through a hydraulic classifying cyclone, and after being mixed, the bottom flow of the slime flows to enter a teetered bed separator for roughing; then, after entering a charging basket of a water medium cyclone, overflow is pumped into the water medium cyclone through a pump for performing concentration operation; after being dehydrated by a coarse clean coal centrifugal machine, the bottom flow of the water medium cyclone after the concentration operation becomes a coarse clean coal product; after being mixed in the charging basket of a spiral separator, the bottom flow of the teetered bed separator flows to enter the spiral separator for scavenging, and then, after being dehydrated by a coarse medium slime centrifugal machine, a light product becomes coarse medium slime; by combining three devices different in separation characteristic, the effective separation of the coarse slime difficult to separate is realized, the quality of the coarse clean coal product is ensured, the ash content of the coarse clean coal product is reduced, and the recovery rate of a coarse slime product is improved; by an opening process, the circulation accumulation of the intermediate material of the system is avoided, and the separation stability is ensured.

Description

technical field [0001] The invention relates to a coarse coal slime separation process and system, in particular to a coarse coal slime three-stage open-circuit combined separation process and system, which is suitable for sorting difficult-to-separate coarse coal slime and obtaining coarse fine coal slime with low ash content . Background technique [0002] Coal is the basic energy of our country and occupies a large proportion in our country's primary energy. With the development of society and the improvement of people's living quality, the clean utilization of coal is becoming more and more important. Coal washing and processing is the source of clean coal utilization, and the innovation of coal washing and processing equipment and technology has made great progress. In recent years, coal preparation technology has made a breakthrough. The dense medium coal preparation technology solves the problem of high-efficiency separation of coarse-grained coal slime, and flotat...

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Problems solved by technology

[0007] Technical problem: The purpose of the present invention is to provide a three-stage open-circuit combined separation process and system for coarse coal slime, which solves the problem of poor separation effect of difficult-to-separate coarse coal slime and ash content of coarse and fine coal slime in the existing coarse coal slime separation process. The problem is that the process cost is low, the process is reasonable, the separation efficiency is high, and the ash content of the product is low

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