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

A dense medium cyclone and coal slime technology, which is applied in chemical instruments and methods, solid separation, wet separation, etc., can solve the problems that the pressure parameters are difficult to meet the requirements, and the liquid level of the qualified medium tank of coal slime cannot be guaranteed to be stable. , achieve good sorting index, ensure high sorting accuracy, and stabilize the working environment

CN103230829AActive Publication Date: 2013-08-07唐山国华科技国际工程有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2013-08-07

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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.
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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...

Examples

Embodiment Construction

[0018] The present invention will be further described below in conjunction with the accompanying drawings.

[0019] figure 1 Shown is the process flow chart of the present invention to ensure the high separation accuracy of the slime dense medium cyclone. figure 2 Disclosed is a process flow chart of a coal slime dense medium cyclone in the prior art. figure 1 and figure 2 In comparison, the device used in the present invention is: three-product dense medium cyclone 1, clean coal discharge medium arc screen (or fixed screen) 2, clean coal medium removal screen 5, coal slime qualified medium barrel 10, coal slime qualified Medium pump 11, raw coal qualified medium barrel 12, raw coal qualified medium pump 13, coal slime dense medium cyclone 15 and related pipelines.

[0020] The difference between the present invention and the prior art is that the device used in the present invention cancels the splitter 18, and the chute under the screen of the clean coal release screen...