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Gangue paste cementing material, preparation method thereof, gangue paste filling material and preparation method thereof

A technology of cementing material and gangue, which is applied in the field of mine filling, can solve the problems of high raw material cost and low strength, and achieve the effects of reduced production cost, high economic value, and improved coagulation strength and coagulation speed

Active Publication Date: 2020-09-22
河北充填采矿技术有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems of low strength and high raw material cost of the existing gangue paste filling material, the present invention provides a gangue paste cementing material and its preparation method, gangue paste filling material and its preparation method

Method used

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  • Gangue paste cementing material, preparation method thereof, gangue paste filling material and preparation method thereof
  • Gangue paste cementing material, preparation method thereof, gangue paste filling material and preparation method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0035] A gangue paste cementing material is composed of the following components in parts by mass:

[0036] 20 parts of Portland cement clinker, 2 parts of sulphoaluminate cement clinker, 5 parts of modified gypsum, 60 parts of mineral powder, 5 parts of limestone powder, 0.2 part of sodium silicate, and 2 parts of admixture.

[0037] Among them, the fineness of Portland cement clinker is between 350-400 mesh;

[0038] Sulphoaluminate cement clinker is mixed with bauxite, limestone, gypsum and boric acid, calcined at 1300°C, and ground to a specific surface area of ​​≥460m 2 / kg obtained, the mixed mass ratio of the bauxite, limestone, gypsum and boric acid is 30:45:8:1, and the content of alumina in the sulphoaluminate cement clinker is 29%;

[0039] The admixture is composed of sodium hydroxymethylcellulose, polyacrylamide, high-efficiency water reducer and polycarboxylate with a mass ratio of 2:1:1:1; the high-efficiency water reducer is composed of wood Calcium sulfonate...

Embodiment 2

[0045] A gangue paste cementing material is composed of the following components in parts by mass:

[0046] 25 parts of Portland cement clinker, 3 parts of sulphoaluminate cement clinker, 8 parts of modified gypsum, 65 parts of mineral powder, 8 parts of limestone powder, 0.25 parts of sodium silicate, and 3 parts of admixture.

[0047] Among them, the fineness of Portland cement clinker is between 350-400 mesh;

[0048] Sulphoaluminate cement clinker is mixed with bauxite, limestone, gypsum and boric acid, calcined at 1350°C, and ground to a specific surface area of ​​≥460m 2 / kg, the mixed mass ratio of the bauxite, limestone, gypsum and boric acid is 36:50:15:1.5, and the content of alumina in the sulphoaluminate cement clinker is 32%;

[0049] The admixture is composed of sodium hydroxymethylcellulose, polyacrylamide, high-efficiency water reducer and polycarboxylate with a mass ratio of 2.5:1.5:1.5:1.5; the high-efficiency water reducer is made of wood with a mass ratio o...

Embodiment 3

[0055] A gangue paste cementing material is composed of the following components in parts by mass:

[0056] 30 parts of Portland cement clinker, 4 parts of sulphoaluminate cement clinker, 10 parts of modified gypsum, 70 parts of mineral powder, 10 parts of limestone powder, 0.3 parts of sodium silicate, and 4 parts of admixture.

[0057] Among them, the fineness of Portland cement clinker is between 350-400 mesh;

[0058] Sulphoaluminate cement clinker is mixed with bauxite, limestone, gypsum and boric acid, calcined at 1400°C, and ground to a specific surface area of ​​≥460m 2 / kg obtained, the mixed mass ratio of the bauxite, limestone, gypsum and boric acid is 42:58:20:2, and the content of alumina in the sulphoaluminate cement clinker is 35%;

[0059] The admixture is composed of sodium hydroxymethylcellulose, polyacrylamide, high-efficiency water reducer and polycarboxylate with a mass ratio of 3:2:2:2; the high-efficiency water reducer is made of wood with a mass ratio ...

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Abstract

The invention relates to the technical field of mine filling, and particularly discloses a gangue paste cementing material and a preparation method thereof, and a gangue paste filling material and a preparation method thereof. The gangue paste cementing material is prepared from the following components in parts by mass: 20 to 30 parts of Portland cement clinker, 2 to 4 parts of sulphoaluminate cement clinker, 5 to 10 parts of modified gypsum, 60 to 70 parts of mineral powder, 5 to 10 parts of limestone powder, 0.2 to 0.3 part of sodium silicate and 2 to 4 parts of additive. The gangue paste filling material is prepared from the following components in percentage by mass: 2.5 to 3 percent of gangue paste cementing material, 16 to 18.5 percent of gangue, 5 to 6 percent of fly ash and the balance of water. The gangue paste cementing material can replace cement to serve as a cementing material to play a role in a gangue paste filling material, the manufacturing cost of the gangue paste filling material is reduced, and the coagulation strength and the coagulation speed of the gangue paste filling material can be greatly improved.

Description

technical field [0001] The invention relates to the technical field of mine filling, in particular to a gangue paste cementing material and a preparation method thereof, a gangue paste filling material and a preparation method thereof. Background technique [0002] Gangue paste filling mining is to process solid waste such as gangue, fly ash, slag, low-quality soil, and urban garbage near the coal mine into a slurry with no critical flow rate and no need for dehydration. The slurry is transported underground to fill the goaf. [0003] The cement in the current gangue paste filling is mostly cement. In the cost of gangue paste filling and mining, the cementing material accounts for more than 45% of the total filling cost, which makes the filling cost of gangue paste filling mining generally high. , causing a certain economic pressure on the mine, seriously restricting the application and development of filling mining technology. Although other cementing materials have recen...

Claims

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Application Information

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IPC IPC(8): C04B28/26C04B7/32
CPCC04B28/26C04B7/32C04B2111/00637C04B2201/50C04B7/02C04B22/143C04B18/142C04B14/28C04B24/383C04B24/2652C04B2103/302C04B18/12C04B18/08
Inventor 贾靖卢志敏杨洪增秦大健郝永超王学伟王英董小娟周金艳曾瑞萍刘艳高泽刘子萌沙漠菊张燕宋佳
Owner 河北充填采矿技术有限公司
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