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Early strength compound admixture for full mill tailing pasty fluid cemented filling material

A technology of cemented filling materials and full tailings, which is applied in the field of mine filling, can solve the problems of low compressive strength, achieve low cost, improve stability, and facilitate industrial production and promotion

Inactive Publication Date: 2014-02-05
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, in view of the shortcomings of secondary dehydration and low early compressive strength of filling materials in the prior art, it is necessary to develop a full tailings that does not require downhole dehydration, can be pumped, has a small amount of cement, and has high early compressive strength. Paste cemented filling material

Method used

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  • Early strength compound admixture for full mill tailing pasty fluid cemented filling material
  • Early strength compound admixture for full mill tailing pasty fluid cemented filling material
  • Early strength compound admixture for full mill tailing pasty fluid cemented filling material

Examples

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Effect test

Embodiment 1

[0019] An early-strength composite admixture for full tailings paste cemented filling materials, which is made by mixing desulfurized gypsum from power plants, quicklime powder, and ultrafine limestone powder;

[0020] The desulfurization gypsum of the power plant has a square hole sieve with a fineness of 80 μm and a sieve residue of less than 10%, and a moisture content of less than 2%;

[0021] The quicklime powder has a fineness of less than 10% through a square hole sieve with a fineness of 80 μm, and a moisture content of less than 2%;

[0022] The ultrafine limestone powder has a maximum particle size of less than 20 μm and an average particle size of 5-6 μm.

[0023] The early-strength composite admixture used for the cemented filling material of the whole tailing sand body, each raw material component is counted in parts by mass, power plant desulfurization gypsum: quicklime powder: superfine limestone powder=10:5:85.

[0024] After the raw materials of each componen...

Embodiment 2

[0028] An early-strength composite admixture for full tailings paste cemented filling materials, which is made by mixing desulfurized gypsum, slaked lime powder, and ultrafine limestone powder;

[0029] The desulfurization gypsum of the power plant has a square hole sieve with a fineness of 80 μm and a sieve residue of less than 10%, and a moisture content of less than 2%;

[0030] The slaked lime powder has a fineness of less than 10% on a square hole sieve with a fineness of 80 μm, and a moisture content of less than 2%;

[0031] The ultrafine limestone powder has a maximum particle size of less than 20 μm and an average particle size of 5-6 μm.

[0032] The early-strength composite admixture used for the cemented filling material of the whole tailing sand body, each raw material component is counted in parts by mass, power plant desulfurization gypsum: slaked lime powder: superfine limestone powder = 15: 7: 78.

[0033] After the raw materials of each component are accurat...

Embodiment 3

[0037] An early-strength composite admixture for full tailings paste cemented filling materials, which is made of natural gypsum, slaked lime powder, and superfine limestone powder;

[0038] The natural gypsum has a fineness of less than 10% through a square hole sieve with a fineness of 80 μm, and a moisture content of less than 2%;

[0039] The slaked lime powder has a fineness of less than 10% on a square hole sieve with a fineness of 80 μm, and a moisture content of less than 2%;

[0040] The ultrafine limestone powder has a maximum particle size of less than 20 μm and an average particle size of 5-6 μm.

[0041]The early-strength composite admixture used for the cemented filling material of the whole tailing sand body, each raw material component is calculated in parts by mass, natural gypsum: slaked lime powder: superfine limestone powder = 20: 10: 70.

[0042] After the raw materials of each component are accurately measured and ground to the specified fineness, they a...

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Abstract

The invention belongs to the technical field of mine filling, and specifically relates to an early strength compound admixture for a full mill tailing pasty fluid cemented filling material. The early strength compound admixture is prepared by mixing the following components in parts by weight: gypsum, lime and superfine limestone flour in a ratio of (10-20):(5-10):(85-70). The effect is the best when the addition amount is 7.5-12.5% by weight of total solid in the full mill tailing pasty fluid cemented filling material. The early strength compound admixture provided by the invention is wide in raw material source and simple in production process. By adding the early strength compound admixture provided by the invention, the mobility and stability of the full mill tailing pasty fluid cemented filling material are improved, the early compressive strength is remarkably improved, and the early strength compound admixture has better environmental and economic benefits.

Description

technical field [0001] The invention belongs to the technical field of mine filling, and in particular relates to a composite admixture for enhancing the early strength of a full tailings paste cemented filling material. Background technique [0002] With the sustained and high-speed growth of my country's national economy, the mining industry has developed rapidly. While the mining industry provides raw materials for the construction of the national economy, it also causes a series of negative problems that affect the natural ecological environment and people's social and economic life, such as the destruction of a large amount of land, the accumulation of a large amount of solid waste on the surface, occupying a large area of ​​land, and releasing pollution as a source of pollution for a long time. There are a large number of mined-out areas underground that affect the surrounding geological stability. These problems have become major environmental safety issues that need...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/14
Inventor 郑娟荣
Owner ZHENGZHOU UNIV
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