Method for guaranteeing high separation precision of coal slime heavy medium hydrocyclone

Abstract

Disclosed is a method for guaranteeing high separation precision of a coal slime heavy medium hydrocyclone. A shunt is cancelled in a device which is utilized in the method; a minus sieve chute of a clean coal medium discharge curved screen and a first section of a minus sieve chute of a clean coal medium drainage screen are respectively connected with a pipeline; one ends of the pipelines are inserted into a slime qualified medium barrel which is provided with an overflow pipe; all or partial minus sieve qualified heavy suspension liquid of the clean coal medium discharge curved screen and the first section of the minus sieve chute of the clean coal medium drainage screen enters into the slime qualified medium barrel; and heavy suspension liquid inside the slime qualified medium barrel flows into a raw coal qualified medium barrel after a liquid level of the slime qualified medium barrel is increased to a certain height. The method for guaranteeing the high separation precision of the coal slime heavy medium hydrocyclone has the advantages of enabling the shunt to be cancelled, saving equipment investment, simplifying the operation process, avoiding unstable liquid level even emptying of the slime qualified medium barrel due to improper manual operation, being capable of providing stable working conditions for the coal slime heavy medium hydrocyclone and guaranteeing the high separation precision of the coal slime heavy medium hydrocyclone.

Description

technical field [0001] The invention relates to a dense medium coal preparation technology in the technical field of clean coal, in particular to a method for ensuring high separation accuracy of a coal slime dense medium cyclone in a dense medium coal preparation plant. Background technique [0002] my country is the world's largest coal producer. In 2011, it produced 3.52 billion tons of raw coal, accounting for about 45% of the world's coal production in that year. Coal is the main energy source in my country, accounting for about 70% of the primary energy production and consumption respectively; coal washing can achieve the four goals of energy saving, transportation saving, environmental pollution reduction and comprehensive utilization of resources. Advanced dense medium coal preparation technology, especially the non-pressure feeding three-product dense medium cyclone coal preparation technology with my country's independent intellectual property rights has become the...

AI Technical Summary

Problems solved by technology

Its disadvantages are: the device used in the process still has a flow divider, and the dense medium suspension must be diverted before entering the coal slime qualified medium tank. During the operation, the liquid level of the coal slime qualified medium tank cannot be guaranteed to be stable. The parameters are also difficult to meet the requirements

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