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Method for cementing and filling of metal mine by application of phosphogypsum material

A gypsum material and cemented filling technology, which is applied in the field of cemented filling of metal mines with phosphogypsum material, can solve the problems of land occupation and surrounding environmental pollution, and achieve the effects of high energy saving efficiency, safe operation and low cost

Inactive Publication Date: 2018-06-22
GUYAN TECH DEV CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to various reasons, the current resource utilization rate of phosphogypsum in my country is less than 15%, and the remaining part is piled up or landfilled as solid waste, which not only takes up a lot of land, but also causes serious pollution to the surrounding environment. The resource utilization of gypsum is urgent

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0026] 2) Preparation of phosphogypsum cementitious material: mixing phosphogypsum, slag, steel slag and water reducing agent in a mixer to obtain phosphogypsum cementitious material;

[0027] 3) Preparation of phosphogypsum dry mix: mixing and stirring the graded tailings and phosphogypsum cementitious material in a mixer to obtain phosphogypsum dry mix;

[0028] 4) Preparation of phosphogypsum filling slurry: mixing and stirring phosphogypsum dry mix and water in a secondary mixer to obtain phosphogypsum filling slurry;

[0029] 5) Filling: The phosphogypsum filling slurry is self-flowed to the mining empty area through the filling pipeline. When the filling height of the slurry reaches the drainage and exhaust outlet, the drainage and exhaust pipeline is blocked, the slurry supply is stopped, and the filling pipeline is cut off.

[0030] Preferably, in step 1), the width of the retaining wall is >50cm.

[0031] Preferably, in step 1), the retaining wall is covered with con...

Embodiment

[0041] 1. Preparation of filling site

[0042] Connect one end of the filling pipe to the outlet of the secondary mixer, and the other end to the mining vacancy to be filled along the mine shaft and mining passage, and place the outlet at the highest point of the mining vacancy; clean up the site and take out all useful items , and then build a wall with bricks and cement, build a pipe with a diameter of about 5cm on the top of the retaining wall for drainage and exhaust, and seal the opening of the mining empty area. The width of the retaining wall should be at least greater than 50cm to prevent the wall If it collapses, put a layer of concrete about 5cm thick on the wall to increase the impact resistance of the retaining wall and prevent water seepage.

[0043] 2. Preparation of phosphogypsum cementitious material

[0044] Add 70 parts by mass of phosphogypsum, 14.5 parts by mass of slag, 15 parts by mass of steel slag and 0.5 parts by mass of water reducing agent into the ...

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PUM

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Abstract

The invention discloses a method for cementing and filling of a metal mine by application of a phosphogypsum material. The method for cementing and filling of the metal mine by application of the phosphogypsum material comprises the following steps: 1) preparation of a site for filling; 2) preparation of a phosphogypsum cementing material; 3) preparation of a dry phosphogypsum mixed material; 4) preparation of a phosphogypsum filling slurry; and 5) filling. The invention provides a method for cementing and filling of the metal mine mainly by utilizing solid wastes like phosphogypsum; and the method has the advantages of simple and convenient production process, safe operation, low cost, high energy-saving efficiency and extremely broad application prospects.

Description

technical field [0001] The invention relates to a method for cementing and filling metal mines with phosphogypsum materials. Background technique [0002] my country is a big producer and consumer of mineral resources. There are more than 110,000 non-coal mines alone, with an annual output of nearly 5 billion tons of ore and an annual output value of more than 500 billion yuan. Mining is the basis for the development and utilization of mineral resources, but while mining provides raw materials for human beings, it will inevitably destroy the surface environment. With the rapid development of industry, the demand for minerals is increasing rapidly, but mineral resources are becoming increasingly exhausted. The safety and environmental problems caused by resource development and utilization are quite prominent. However, most mining enterprises in my country have small production scales, backward technology, and blind production. The nature and passivity are high, which leads t...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
CPCC04B28/143C04B2111/00017C04B2111/00724C04B18/141C04B18/142C04B18/12C04B2103/302
Inventor 潘敏尧李鹏陈锡麟陈忠平何威冯波宇伍航宇黄小波黄威龙张善硕赵泽民
Owner GUYAN TECH DEV CO LTD