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Pit backfill casting stone made from fly ash, steel slag and coal gangue

A technology of fly ash and coal gangue, applied in the direction of sustainable waste treatment, solid waste management, application, etc., can solve the problems of low utilization rate of valuable components, long production cycle, complicated process, etc., and achieve excellent environmental performance and reduce waste Transportation costs, the effect of abundant materials

Inactive Publication Date: 2012-11-28
贵州绿水青山环保科技有限公司
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Problems solved by technology

At present, most of fly ash, coal gangue and steel slag are piled up and landfilled, and the comprehensive utilization is only simple brick pressing, etc., and the utilization rate of valuable components is extremely low. At the same time, the production cycle is long, the process is complicated, and the cost is high.

Method used

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  • Pit backfill casting stone made from fly ash, steel slag and coal gangue

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Embodiment Construction

[0024] Embodiment 1 of the present invention. A mine pit backfilling fly ash, steel slag and coal gangue to make pouring stone, which is prepared by adding fly ash, steel slag, coal gangue powder, lime and gypsum powder to a foaming agent, mixing it with water, and pouring it into mines and culverts. Through long-time foaming and coagulation, the coagulation time period is 1 month to 2 years. The foaming agent is concrete foaming agent such as aluminum powder, bicarbonate inorganic salt, tea saponin or rosin soap.

[0025] Embodiment 2 of the present invention. According to different design requirements, by weight components, it consists of 30-70 parts of fly ash, 10-50 parts of steel slag, 10-20 parts of coal gangue powder, 1-10 parts of lime, 1-10 parts of gypsum powder and foaming agent 0.0001-0.0003 parts are prepared. The particle size of each raw material powder is 24 mesh-300 mesh. Mix all the raw material powders with water and pour them into mine caves and culvert...

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Abstract

The invention discloses a pit backfill casting stone made from fly ash, steel slag and coal gangue, and is characterized in that the casting stone prepared by fly ash, steel slag, coal gangue powder, lime, gypsum powder and a blowing agent. Directed at a plurality of mine holes and geological instability in coal mine and mining and metallurgy areas, and problems of a lot of tailings and wastes such as fly ash, coal gangue, steel slag and the like left behind, the invention proposes a casting stone proportioning scheme. Various raw materials are processed into powder and turned into slurry which is then injected into the mine holes and culverts for condensation, and can slowly generate a hydraulic cementing material mainly composed of calcium silicate, aluminate and iron aluminate. By the blowing agent, the casting stone can expand to fill the space which is not injected with the casting stone, and will not pollute the groundwater layer and soil texture at the same time.

Description

technical field [0001] The invention relates to a mine pit backfilling fly ash, steel slag and coal gangue to make pouring stone, and belongs to the technical field of fly ash and steel slag recycling. Background technique [0002] At present, with the development of industry and urban construction, the discharge of fly ash from coal-fired power plants, coal gangue screened out from coal mining, waste from urban expansion and construction, and steel slag from steelmaking plants has increased year by year. It not only takes up a large amount of farmland and land, but also causes environmental pollution. The large number of pits, roadways and goafs left by mining will also cause serious geological disasters and environmental pollution over time, such as landslides, cracks, surface subsidence, water loss, damage to cultivated land, forests, houses, groundwater pollution and Hazards to life and property such as humans and animals. The social contradictions caused by this are a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B38/02C04B30/00C04B18/30
CPCY02W30/91
Inventor 邹建明阮正林高宏刘钊赵高华魏长春苏向东
Owner 贵州绿水青山环保科技有限公司
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