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Full tailing cementing material

A cementing material and full tailings technology, which is applied in the field of mine filling, can solve problems such as unsatisfactory filling body strength, failure of normal consolidation and hardening of filling slurry, and influence on smooth mining operations, etc., to achieve high strength, reliable effect, and material The effect of low total cost

Inactive Publication Date: 2019-01-25
CHINA UNIV OF MINING & TECH (BEIJING)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When ordinary portland cement is used as the cementing agent for this kind of tailings filling slurry, the filling slurry cannot be consolidated and hardened normally, and the strength of the filling body cannot meet the requirements of mining technology, thus affecting the smooth progress of mining operations

Method used

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Examples

Experimental program
Comparison scheme
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Embodiment Construction

[0017] The present invention will be further described below, but the protection scope of the present invention is not limited to the scope of the specific embodiments described below.

[0018] A gold mine uses full tailings cemented filling slurry to fill the goaf. The laser particle size analysis test results of the full tailings are: the median particle size of the full tailings d 50 =52.51 μm, -200 mesh (-74 μm) accounts for about 65%. Among them, the -20μm particle content reaches 22.17%, which belongs to ultrafine full tailings. It has a large specific surface area and high mud content, which has a certain influence on tailings concentration, filling dehydration and filling body strength.

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PUM

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Abstract

The invention discloses a full tailing cementing material, and belongs to the field of mine filling. The full tailing cementing material comprises cementing powder and modifying agents. The cementingpowder comprises, in weight percent, 70% of water slag, 6% of lime, 12% of gypsum and 12% of P.O42.5 cement. The modifying agents comprise, in weight percent, 50% of Na2SiF6, 25% of KAl (SO4)2*12H2O and 25% of Na2CO3. The modifying agents account for 0.4% of the weight of the cementing powder. The material is used for cementing full-tailings containing fine particles, so that full-tailing fillerscan have high strength, and the material has the advantage of simplicity in preparation and reliable effects.

Description

technical field [0001] The invention belongs to the field of mine filling, in particular to a material for cementing metal ore tailings. Background technique [0002] At present, metal mines widely use full tailings to fill goafs. There are generally more fine particles with a particle size of less than 20 μm in the whole tailings, and the content of -20 μm particles in the whole tailings of most mines is greater than 15%. When ordinary portland cement is used as the cementing agent of the full tailings filling slurry, the filling slurry cannot be consolidated and hardened normally, and the strength of the filling body cannot meet the requirements of mining technology, thereby affecting the smooth progress of mining operations. [0003] For this reason, it is necessary to seek new all-tailing sand bonding materials to improve the consolidation performance of the slurry, increase the strength of the filling body, and provide technical support for the improvement of filling ef...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
CPCC04B28/14C04B2111/00017C04B2201/50C04B18/141C04B7/34C04B7/02C04B22/126C04B22/142C04B22/10
Inventor 王炳文熊庭永崔向宇张毅高利晶
Owner CHINA UNIV OF MINING & TECH (BEIJING)