A method and system for preparing tailings filling slurry

Abstract

The present invention discloses a method and a system for preparing a tailings filling slurry. The method comprises: pumping concentrator tailings pumping station tailings to a cyclone through a tailings conveying pipe pump, and concentrating the tailings through the cyclone, wherein the cone angle of the cyclone is 15 DEG, the diameter is 350 mm, the work pressure is 120 Kpa, and the ratio of the overflow diameter to the underflow diameter is more than or equal to 0.44 and is less than or equal to 0.56; sequentially conveying the underflow obtained through concentration by using the cyclone to a first stirring barrel and a second stirring barrel through pipelines or directly conveying to the second stirring barrel; conveying a material to be stirred and provided for preparing a slurry to the second stirring barrel; stirring the tailings in the second stirring barrel and the material to be stirred to obtain a slurry; and conveying the slurry to a material discharge hopper through a pipeline, and filling the underground. According to the present invention, the problems of high tailings overflow concentration, low tailings utilization rate, waste of resources, and high cost during tailings concentration by using the vertical sand bin are solved.

Description

technical field [0001] The present application relates to the technical field of tailings treatment, in particular to a method and system for preparing tailings filling slurry. Background technique [0002] When mining low-grade mines located in plain areas, since the mining operations are carried out underground, in order to ensure the safety of surface buildings and farmland, protect the ecological environment, and achieve safe production, the surface must be kept stable during the mining process. prevent collapse. [0003] At present, most mines use the filling mining method, a typical filling process, in the production operation process to avoid the occurrence of surface subsidence. The specific implementation process of filling mining method is as follows: [0004] First, the tailings from the concentrator are pumped directly into the vertical sand bin, and the solid particles of the tailings settle in the vertical sand bin. After the tailings have settled for a peri...

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Problems solved by technology

[0009] This application provides a method and system for preparing tailings filling slurry to solve the problems of high tailings overflow concentration, low tailings utilization rate, waste of resources, and high cost when using a vertical sand bin for tailings concentration

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