Coal separating process of crude coal slime hydroseparation

Abstract

The invention relates to a coal separating process of crude coal slime hydroseparation, belonging to a coal separating technology. The following technological procedures are added to a traditional crude coal slime hydroseparation process: coal slime water enters a coal slime screen drainage pool and then is conveyed into an inclined plate depositing tank through a water pump to finish the concentration and grading operations of the coal slime water, wherein an inclined plate overflows and enters a flotation system, and the bottom of the inclined plate flows through a buffer tank and enters a crude coal slime hydroseparator; and circulating water in a circulating water pool is sent into the crude coal slime hydroseparator for carrying out separation operations through a water circulating pump, a valve, a check valve, a pressure reducing valve, a pressure gage and an electromagnetic flow meter through a U-shaped pipeline. The process improves the separation effect and the separation efficiency of the crude coal slime, reduces the coal loss and the coal separation processing cost and optimizes the coal separation and treatment process of the crude coal slime.

Description

technical field [0001] The invention belongs to coal preparation technology, and mainly relates to a coarse coal slime hydraulic separation technology. Background technique [0002] Coarse slime recovery process is an important technical design in coal preparation plant design. At present, in the commonly used coarse coal slime hydraulic separation process, the slime water after preparation and gravity separation is directly sent to the coarse coal slime hydraulic separator for separation operations. Before the hydraulic separation of coarse coal slime, the operating procedures of concentration, classification, buffer and steady flow of the slime water are designed, and the pressure of the clean water entering the coarse coal slime hydraulic separator is unstable, which makes the process technology have fluctuations in the feed water supply of coarse coal slime , the separation efficiency of coarse coal slime is low, the recovery rate of clean coal is low, and the loss of c...

AI Technical Summary

Problems solved by technology

[0005] Compared with the prior art, the present invention fully demonstrates the following advantages: 1. Supply circulating water to the coarse coal slime hydraulic separator, provide power for the separation, support the bed inside the separator, and create conditions for the separation , the circulating water contains coal slime, which increases the density of the sorting medium, significantly improves the sorting effect, and the sorting efficiency increases by 1%; 2. Before the coarse coal slime enters the coarse coal slime hydraulic separator, the increased buffer stability The flow process provides a stable liquid level for the separator, reduces the impact and disturbance of feeding materials, helps to improve the separation effect, and the separation efficiency increases by 1%; 3. In order to stably supply circulating water to the coarse coal slime hydraulic separator , using valves, check valves, pressure reducing valves, pressure gauges, and electromagnetic flowmeters to control the flow and pressure of circulating water, which solves the problem of low separation efficiency caused by changes in the selectivity of coarse coal slime, and improves the coarse coal slime. The adaptability of coal slime hydraulic separator and the recovery rate of clean coal in coarse coal slime can reduce the loss of clean coal by 2%.