Highly flame-retardant carbon-containing mine filling grout additive

Abstract

The invention discloses a filling and grouting material additive for antiflaming high-carbon mines, which belongs to a filling and grouting material additive. The filling and grouting material additive is formed by stirring and fixing inorganic materials and organic materials, wherein, the respective weight parts of the inorganic materials and the organic materials are as follows: 80-90 parts of inorganic materials and 10-20 parts of organic materials. The invention has the advantages that the effects of antiflamming and shear thinning of high-carbon desulfurized fly ash, namely CFB desulfurized fly ash, are good; the raw materials have wide sources; and the manufacture is easy. The high-carbon desulfurized fly ash can be massively and continuously utilized on the spot or near a coal mining area. Therefore, the ecological environment of the coal mining area can be improved.

Description

technical field [0001] The invention relates to an admixture for filling grouting material. Specifically, it is a flame-retardant high-carbon mine filling grouting admixture. It is especially suitable for the high-carbon circulating fluidized bed desulfurization ash with increasing output as filling grouting material. Background technique [0002] At present, my country's thermal power plants mainly have two types of power generation boilers with different installed capacities. One is a pulverized coal boiler that burns good coal and has a large installed capacity. The ordinary fly ash produced in the boiler is called PC ash; the desulfurized gypsum produced in the desulfurization tower behind the furnace is not in the technical field. Another type of boiler is a circulating fluidized bed boiler that mainly burns low calorific value fuel. The fly ash produced when it is not desulfurized is called circulating fluidized bed fly ash. However, most of these boilers have taken ...

AI Technical Summary

Problems solved by technology

Scattered piles of fly ash are piled up everywhere underground, seriously polluting the underground working environment

Moreover, when the water and ash are separated and the water is lost from the ash, the air enters the mortar, causing a large area of ​​direct contact between the carbon particles and oxygen, which brings the hazards of charcoal smoldering and charcoal spontaneous combustion to many places underground.

Practice and theory have proved that large water-cement ratio slurry filling downhole filling not only has poor effect, high overall cost, but also has a large additional workload, so it cannot be implemented in mines.

[0004] Some people have tried to decarbonize this kind of ash before going into the mine. Practice has proved that the cost of decarbonization is high, and some technologies are not yet mature, and they are not suitable for the actual situation in coal mining areas.

[0005] In view of the coarse and uneven particles of CFB desulfurization ash, it is easy to precipitate and grind the pipe during the transportation process, and it is easy to scale and block the pipe