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A filling material for filling mining

A filling material and filling paste technology, applied in cement production and other directions, can solve the problems of slow paste solidification reaction, reduced filling efficiency, low paste curing temperature, etc., to prevent segregation and subsidence, improve filling efficiency, and workability. Good results

Active Publication Date: 2022-04-22
SHANDONG KANGER ENERGY TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, due to strict environmental protection inspection and control in recent years, ammonia water is often added to denitrification during coal combustion in power plants, resulting in a strong smell of ammonia water in fly ash, and ammonia gas is released when it is used in paste mixing, because the release of ammonia gas is an endothermic reaction, resulting in The paste curing temperature is low, which makes the solidification reaction of the paste slower and delays the demoulding time. Generally, the paste solidification and pulling time is more than 10 hours, which greatly reduces the filling efficiency.

Method used

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  • A filling material for filling mining
  • A filling material for filling mining

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Experimental program
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Effect test

Embodiment 1

[0022] The filling material is made of the following raw materials in parts by weight: 52 parts of 325 cement; 34 parts of slag fine powder; 7 parts of calcium sulfoaluminate; 4 parts of calcium aluminate; 2 parts of calcium oxide; 1 part of sodium carbonate. After the filling material is processed by drying, grinding and other processes, a high-fineness and high-activity powder is obtained. The content of particles smaller than 0.045mm in the powder is not less than 67.03%. The particle size of the powder meets the requirement of stirring with water to form a viscous paste slurry, which can well wrap the sticky gangue particles and prevent the gangue particles from segregating and sinking. The bulk density of filling material powder is 0.81KG / L, which belongs to medium density powder. The filling material itself has a certain cementing effect, and it can also be used alone in projects that do not require high compression resistance. The compressive strength is not less than ...

Embodiment 2

[0024] There are active components in the filling material, and the interaction with fly ash and gangue powder is obvious under the action of aqueous solution. The active substances of each other excite each other, a chemical reaction occurs, and anions and cations adsorb and precipitate each other to form a dense solid.

[0025] 2R - +Ca 2+ =CaR 2

[0026] al 3+ +3OH - =Al(OH) 3

[0027] 2H 2 O+SO 4 2- +Ca 2+ =CaSO 4 .2H 2 o

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Abstract

The invention discloses a filling material for filling mining. The filling material is made of the following raw materials in parts by weight: 52 parts of 325 cement; 34 parts of fine slag powder; 7 parts of calcium sulfoaluminate; 4 parts of calcium aluminate; Calcium oxide accounts for 2 parts; sodium carbonate accounts for 1 part. The filling material can be used independently or formulated into a paste with fly ash and gangue. The paste has the characteristics of good workability, low bleeding rate, suitable for pumping, short hardening time, and high compressive strength after solidification. The filling material can consume a large amount of coal gangue in coal mine filling and mining operations, so as to achieve the purpose of turning waste into treasure.

Description

technical field [0001] The invention relates to a filling material for filling and mining, which can be used in underground filling, embankment construction, road paving and other projects. Background technique [0002] Filling generally uses fly ash, cement, gangue, and mine water as four filling materials, which are blended in a certain proportion to form a fluid with a slump between 265-285mm, which can ensure good flow performance and avoid gangue. Segregated safety features. However, due to strict environmental protection inspection and control in recent years, ammonia water is often added to denitrification during coal combustion in power plants, resulting in a strong smell of ammonia water in fly ash, and ammonia gas is released when it is used in paste mixing, because the release of ammonia gas is an endothermic reaction, resulting in The low curing temperature of the paste makes the solidification reaction of the paste slower, which delays the demoulding and pullin...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B7/19C04B7/52C04B28/08
CPCC04B7/19C04B7/52C04B28/08C04B2201/50C04B2111/00724C04B2111/0075C04B18/08C04B18/12Y02P40/10
Inventor 赵庆民施现院柳成懋刘春明郭守刚沈海东李向阳李明闯
Owner SHANDONG KANGER ENERGY TECH CO LTD
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