Hydraulic classification recovery method for coal slime

Abstract

Disclosed is a hydraulic classification recovery method for coal slime, which belongs to the technical field of coal slime recovery equipment. The method is characterized by including the following steps: step 1) feeding coal slime water into a coal slime barrel (1) by a coal slime water feeding pipe (18); step 2) feeding the coal slime water in the coal slime barrel (1) into a hydraulic cyclone (3) through a coal slime pump (2) so as to grade, and meanwhile, enabling, by a control cabinet (14), the pressure of the coal slime water entering the hydraulic cyclone (3) to be stable through an electric valve and a pressure transmitter which are arranged between the coal slime pump (2) and the hydraulic cyclone (3); and step 3) enabling the coal slime delivered by the hydraulic cyclone (3) to enter a recovery device to perform classification recovery again, and returning the classified water to the coal slime barrel (1) to complete coal slime classification. According to the hydraulic classification recovery method for coal slime, the pressure of the coal slime entering the hydraulic cyclone is kept stable, fine control is completed, coal slime classification is accurate, and the problem of pipeline blockage caused by improper coal slime classification is avoided.

Description

technical field [0001] The invention discloses a coal slime hydraulic classification recovery method, which belongs to the technical field of coal slime recovery equipment. Background technique [0002] Coal washing generally refers to the process of removing gangue or other impurities from coal. Coal washing is generally carried out by utilizing the different physical properties of coal and gangue, and separating coal and gangue (impurities) in media of different densities or characteristics. In the process of coal washing and processing, coal slime recovery is an important source of profit for coal preparation plants. Coarse slime classification is an important link. The effect of coarse coal slime recovery is also directly related to coarse coal slime sorting and fine coal slime flotation. The effect will affect the product quality and recovery rate. Improper classification of coarse coal slime will lead to pipeline blockage and failure, which will affect the normal pro...

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Problems solved by technology

Improper classification of coarse coal slime will lead to pipeline blockage and failure, which will affect the normal production and operation of the coal preparation plant, and even lead to shutdown in severe cases

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