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Mine pit backfill material as well as preparation method and application thereof

A technology for pits and raw materials, applied in mining equipment, fillings, earthwork drilling, etc., can solve the problems of polluted water sources and difficult to deal with, and achieve the effect of low backfilling cost and improving mineralization efficiency.

Active Publication Date: 2022-03-04
内蒙古鄂尔多斯电力冶金集团股份有限公司 +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The annual discharge of the above-mentioned industrial solid waste is relatively large, such as calcium carbide slag, waste gypsum and fly ash, which are about 26Mt, 220Mt and 1000Mt respectively. They are widely distributed, difficult to deal with, and pollute local water sources. problem

Method used

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  • Mine pit backfill material as well as preparation method and application thereof
  • Mine pit backfill material as well as preparation method and application thereof
  • Mine pit backfill material as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 A kind of pit backfill material and preparation method

[0030] A mine pit backfill material is composed of the following raw materials in parts by weight:

[0031] 25 parts of industrial solid waste, 170 parts of water, 1 part of sodium dodecylbenzene sulfonate, 1 part of polyvinyl alcohol and 8 parts of cement.

[0032] The preparation method of described pit backfill material comprises the following steps:

[0033] S1. Industrial solid waste is pulverized to obtain raw materials with a particle size of 20 microns;

[0034] S2. Hydrating and calcining the raw material obtained in step S1 with 100 parts of water to obtain a sample;

[0035] The treatment conditions for the hydration calcination are: stirring at 25°C for 5h, drying treatment, and calcination at 400°C for 3h;

[0036] S3. Stir the sample obtained in step S2 with sodium dodecylbenzenesulfonate, polyvinyl alcohol and the remaining amount of water to form a slurry, inject 30% carbon dioxide,...

Embodiment 2

[0038] Embodiment 2 A kind of pit backfill material and preparation method

[0039] A mine pit backfill material is composed of the following raw materials in parts by weight:

[0040] 30 parts of industrial solid waste, 210 parts of water, 3 parts of sodium dodecylbenzene sulfonate, 5 parts of polyvinyl alcohol and 12 parts of cement.

[0041] The preparation method of described pit backfill material comprises the following steps:

[0042] S1. Industrial solid waste is pulverized to obtain raw materials with a particle size of 400 microns;

[0043] S2. Hydrating and calcining the raw material obtained in step S1 with 120 parts of water to obtain a sample;

[0044] The treatment conditions for the hydration calcination are: stirring at 50°C for 2h, drying treatment, and calcination at 800°C for 1h;

[0045] S3. Stir the sample obtained in step S2 with sodium dodecylbenzenesulfonate, polyvinyl alcohol and the remaining amount of water to form a slurry, inject 100% carbon dio...

Embodiment 3

[0047] Embodiment 3 A kind of pit backfill material and preparation method

[0048] A mine pit backfill material is composed of the following raw materials in parts by weight:

[0049] 29 parts of industrial solid waste, 200 parts of water, 2 parts of sodium dodecylbenzene sulfonate, 3 parts of polyvinyl alcohol and 9 parts of cement.

[0050] The preparation method of described pit backfill material comprises the following steps:

[0051] S1. Industrial solid waste is pulverized to obtain raw materials with a particle size of 100 microns;

[0052] S2. Hydrate and calcinate the raw material obtained in step S1 with 115 parts of water to obtain a sample;

[0053] The treatment conditions for the hydration calcination are: stirring at 30°C for 3h, drying treatment, and calcination at 600°C for 2h;

[0054] S3. Stir the sample obtained in step S2 with sodium dodecylbenzenesulfonate, polyvinyl alcohol and the remaining amount of water to form a slurry, inject 80% carbon dioxide...

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Abstract

The invention discloses a pit backfill material, a preparation method and application thereof, and the pit backfill material is composed of the following raw materials in parts by weight: 25-30 parts of industrial solid waste, 170-210 parts of water, 1-3 parts of sodium dodecyl benzene sulfonate, 1-5 parts of polyvinyl alcohol and 8-12 parts of cement. The preparation method comprises the following steps: S1, carrying out pulverization treatment on industrial solid waste; s2, carrying out hydration calcination on the raw material obtained in the step S1 and part of water; s3, stirring the sample obtained in the step S2 with sodium dodecyl benzene sulfonate, polyvinyl alcohol and the rest of water to form slurry, and injecting carbon dioxide for mineralization; and S4, mixing the mineralized sample obtained in the step S3 with cement. The filler disclosed by the invention can be used for backfilling a coal mine pit, the backfilling cost is reduced, and meanwhile, the filler has the dual advantages of reducing carbon dioxide emission and solving the problem of industrial waste emission.

Description

technical field [0001] The invention relates to the technical field of industrial solid waste treatment, in particular to a pit backfill material, a preparation method and an application thereof. Background technique [0002] With the process of global industrialization, the excessive use of fossil fuels leads to a large amount of greenhouse gas emissions, such as carbon dioxide and methane. Among them, increasing atmospheric CO 2 Concentration has the greatest impact on global warming, bringing a lot of extreme weather and environmental disasters, such as floods, droughts, rising sea levels, etc. In order to reduce carbon dioxide emissions, people are developing new energy sources including solar energy, wind energy and hydrogen energy to replace fossil energy sources, but it is still difficult to achieve in the short term. Therefore CO 2 Capture and storage are the main ways to reduce carbon emissions. [0003] CO 2 Mineralization (carbonation) is the process of simul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/00E21F15/00C04B22/06C04B18/14C04B18/08C04B18/04C04B24/20C04B24/26
CPCC04B28/00E21F15/005C04B18/142C04B18/0481C04B18/0445C04B18/08C04B22/06C04B24/20C04B24/2623C04B2111/00724C04B2201/50Y02W30/91
Inventor 杨京林代元元解荣永牛强
Owner 内蒙古鄂尔多斯电力冶金集团股份有限公司
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