Fine particle coal dehydration recovery system for coal tailings

Abstract

The invention relates to a method which utilizes a fine particle coal dehydration recovery system for coal tailings. The fine particle coal dehydration recovery system for the coal tailings comprisesa cleaned coal dehydration recovery subsystem and a middling coal dehydration recovery subsystem; the cleaned coal dehydration recovery subsystem is set to enable cleaned coal magnetic separated tailings to pass through a first laminated high-frequency screen to obtain primary rough cleaned coal and rough cleaned coal screen underflow, input the primary rough cleaned coal into a rough cleaned coalcentrifugal machine to carry out centrifugal separation to obtain rough cleaned coal and enable the rough cleaned coal screen underflow to pass through a flotation machine and a press filter to obtain flotation cleaned coal; and the middling coal dehydration recovery subsystem is set to enable middling coal magnetic separated tailings to pass through a second laminated high-frequency screen to obtain primary middling coal and middling coal screen underflow, enable the primary middling coal to pass through a middling coal centrifugal machine to separate out middling coal and input the middlingcoal screen underflow into a concentrator to obtain concentrated coal. The fine particle coal dehydration recovery system for the coal tailings has the beneficial effects that a phenomenon of ''material channeling'' water leakage of a vibration curved screen is solved; the process flow is simplified; energy consumption is saved; economic benefits are increased; and a utilization rate of water resources is improved.

Description

technical field [0001] The invention belongs to the technical field of coal mine mining, and more specifically, the invention relates to a process for dehydrating and recovering coal mine tailings. Background technique [0002] At present, most coal preparation plants adopt the combined production process of raw coal dense medium-coal slime flotation and the "2+2" slime water treatment process to recover coal mine tailings. For the dehydration recovery of dense medium coarse and clean coal, the combined dehydration process of traditional vibrating arc screen plus vertical centrifuge is adopted. For the dehydration recovery of fine coal slime, the dehydration recovery process of sedimentation centrifuge is incorporated into medium coal. [0003] In actual production practice, there are several deficiencies in these two dehydration processes: [0004] 1. The curved sieve is easy to shift materials, which leads to a decrease in screening efficiency and affects the dehydration ...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the invention is to solve the problems of low screening efficiency, complex process and high energy consumption of the system caused by the curved screen in the fine-grained coal dehydration recovery system to the greatest extent, and to provide a tailing coal mine fine-grained coal dehydration recovery system

Images