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Tailing recycling process and system based on optimization of product structure

A technology of product structure and recycling, applied in the direction of solid separation, etc., can solve the problems of filter press equipment with many accessories, high production and maintenance costs, and large maintenance volume, so as to reduce personnel costs, small maintenance volume, and production accidents little effect

Pending Publication Date: 2019-04-12
XINKUANG INNER MONGOLIA ENERGY CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In the actual production process, due to the large circulation volume of the flotation system, the four flotation columns cannot meet the production needs, resulting in coal running out of the system, and part of the clean coal enters the filter press system and turns into coal slime, and the final slime ash content is only 38. %, the calorific value is as high as 4000 kcal
In addition, the concentrated filter press needs to be supervised by a full-time driver, and the personnel cost is high for frequent adjustments; the filter press has many accessories, a large amount of repair and maintenance, and high production and maintenance costs

Method used

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  • Tailing recycling process and system based on optimization of product structure
  • Tailing recycling process and system based on optimization of product structure
  • Tailing recycling process and system based on optimization of product structure

Examples

Experimental program
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Effect test

Embodiment 1

[0029] A tailings recycling process based on an optimized product structure. Part of the bottom flow of the thickening tank is driven into the high-frequency screen of the TBS tailings of the coarse coal slime separation system, so that the coal slime can be evenly blended into the medium coal, and part of the coarse coal Mud is converted into medium coal. The specific steps are as follows: first, use dense medium shallow tank to separate 200-13mm lump coal; then use pressurized two-product dense medium cyclone to select 50-1.0mm lump coal; then use TBS separator (interference bed separator) ) to sort 1.0-0.25mm coarse coal slime; then use micro-bubble swirl flotation column to flotation -0.25mm fine particle coal slime; then use quick-opening filter press to dehydrate and recover flotation concentrate; The flotation tailings are recovered by means of filtration and recovery, and then part of the bottom flow of the concentrated pool is pumped into the high-frequency screen of ...

Embodiment 2

[0032] A tailings recycling system based on optimized product structure, including dense medium shallow tank 1 connected in sequence, pressurized two-product dense medium cyclone 2, TBS separator 3, microbubble cyclone flotation column 4, fast Open filter press 5, concentrated filter press 7; also includes concentrator underflow pump 7, one end of the concentrator underflow pump is connected to the concentration pool of the concentrator filter press, and the other end of the concentrator underflow pump is connected to the TBS sorter The high-frequency screen of the concentrator; the head of the underflow pump of the concentrator is high; the pipeline from the underflow pump of the concentrator to the high-frequency screen of the TBS separator is 38 meters.

[0033] By adding a 38-meter underflow pump to the TBS high-frequency screen pipeline, part of the bottom flow of the concentrated pool is pumped into the TBS tailings high-frequency screen of the coarse slime separation sys...

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PUM

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Abstract

The invention relates to the technical field of coal preparation, in particular to to a tailing recycling process and a tailing recycling system based on optimization of a product structure, and especially relates to a high-efficiency coal slurry recycling system applicable to the tailing recycling process. For reducing the heat generation of coal slurry, and optimizing the product structure, thetailing recycling process is innovated on the premise of not affecting the quality of a middling coal product, the coal slurry is considered to be uniformly blended with middling coal; a part of coarse-particle coal slurry is transformed into middling coal a product price difference is found, and the economical efficiency of an enterprise is improved; in the scheme, a part of the bottom flow of aconcentration tank is put into a TBS tailing high-frequency screen of a coarse coal slurry separating system in a hit manner, so that the coal slurry is uniformly blended with the middling coal.

Description

technical field [0001] The invention relates to the technical field of coal preparation, in particular to a tailings recovery process and system with optimized product structure, especially a high-efficiency coal slime recovery system suitable for the tailings recovery process. Background technique [0002] The third plant of Xinkuang Inner Mongolia Energy Coal Washing Branch Company is a mine-type coking coal preparation plant. The plant undertakes the task of washing raw coal from the third mine of the Great Wall, with a design washing capacity of 5 million tons per year. [0003] In the original design of the No. 3 flotation system of Inner Mongolia Energy Coal Washing Branch of Xinkuang, six flotation columns were required to be installed. However, considering the shortage of construction funds at that time, only four were installed during installation, and the remaining two were not installed. In the actual production process, due to the large circulation volume of the ...

Claims

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Application Information

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IPC IPC(8): B03B9/00
CPCB03B9/005
Inventor 王焕忠刘勇王军侯玉茂訾强白玉峰贺文鹏王肇杰崔波万庆瑞
Owner XINKUANG INNER MONGOLIA ENERGY CO LTD