Multi-element coal-based solid waste composite acid excited underground filling material and preparation method thereof

A filling material and composite acid technology, which is applied in the field of multi-component coal-based solid waste composite acid excitation underground filling material and its preparation, can solve the problems of restricting the rapid development of ecological economy and society, low comprehensive utilization rate of solid waste, and land occupation. Achieve large-scale safe consumption and resource utilization, prevent environmental and economic problems, and save cement

Pending Publication Date: 2022-03-04
INST OF ENERGY HEFEI COMPREHENSIVE NAT SCI CENT (ANHUI ENERGY LAB)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The Lianghuai mining area is one of the major coal production bases in the country. The rapid development of the coal, electricity and chemical industry has produced a large amount of solid waste. The comprehensive utilization rate of solid waste is low, a large amount of land is occupied, and the environment is seriously polluted, which restricts the rapid development of the regional ecological economy and society.

Method used

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  • Multi-element coal-based solid waste composite acid excited underground filling material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0017] The preparation method of a multi-component coal-based solid waste composite acid-activated downhole filling material is as follows:

[0018] (1) Firstly, the coal gangue and furnace bottom slag are crushed into particle sizes below 25mm, each of which is formulated into a continuous gradation, and then the fly ash and gasification slag are respectively configured into a continuous gradation, and the 42.5-grade ordinary silicon Put the salt cement into the ball mill for continuous ball milling for 30 minutes to ensure that the particle size of the cement particles is less than 10um.

[0019] (2) Weigh 1800g of 42.5 grade ordinary Portland cement after ball milling, 200g of desulfurized gypsum and mix them evenly, 1000g of water and 40g of acetic acid, mix them evenly, weigh 7000g of well-graded fly ash, and 1000g of gasification slag And mix evenly, finally take by weighing well-graded coal gangue 11000g, furnace bottom slag 1000g and mix evenly;

[0020] (3) First, ad...

Embodiment 2

[0022] The preparation method of a multi-component coal-based solid waste composite acid-activated downhole filling material is as follows:

[0023] (1) Firstly, the coal gangue and furnace bottom slag are crushed into particle sizes below 20mm, and each is prepared into a continuous gradation, and then the fly ash and gasification slag are respectively prepared into a continuous gradation, and the 42.5-grade ordinary silicon Put the salt cement into the ball mill for continuous ball milling for 30 minutes to ensure that the particle size of the cement particles is less than 10um.

[0024] (2) Weigh 1600g of 42.5 grade ordinary Portland cement after ball milling, 250g of desulfurized gypsum and mix them evenly, 1200g of water and 40g of acetic acid, mix them evenly, weigh 6000g of well-graded fly ash, and 1100g of gasification slag And mix evenly, finally take by weighing well-graded coal gangue 10000g, furnace bottom slag 1200g and mix evenly;

[0025] (3) First, add the ace...

Embodiment 3

[0027] The preparation method of a multi-component coal-based solid waste composite acid-activated downhole filling material is as follows:

[0028] (1) Firstly, the coal gangue and furnace bottom slag are crushed into particle sizes below 25mm, each of which is formulated into a continuous gradation, and then the fly ash and gasification slag are respectively configured into a continuous gradation, and the 42.5-grade ordinary silicon Put the salt cement into the ball mill for continuous ball milling for 30 minutes to ensure that the particle size of the cement particles is less than 10um.

[0029] (2) Weigh 2000g of 42.5 grade ordinary Portland cement after ball milling, 300g of desulfurized gypsum and mix them evenly, 1000g of water and 30g of acetic acid, mix them evenly, weigh 7000g of well-graded fly ash, and 1200g of gasification slag And mix evenly, finally take by weighing well-graded coal gangue 12000g, furnace bottom slag 800g and mix evenly;

[0030] (3) First, add...

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Abstract

The invention relates to the field of mine filling materials, and discloses a multi-element coal-based solid waste composite acid-activated underground filling material and a preparation method thereof.The filling material comprises 5-40 wt% of a cementing material, 20-55 wt% of fine aggregate and 40-75 wt% of coarse aggregate, the cementing material comprises cement, desulfurized gypsum, acetic acid and water, the fine aggregate comprises gasified slag and fly ash, and the coarse aggregate comprises water and water. The coarse aggregate comprises coal gangue and furnace bottom slag. The environment-friendly multi-element coal-based solid waste composite acid-excited underground filling material is prepared by taking composite multi-element coal-based solid waste as a main raw material, adding superfine Portland cement as a reverse filling material and taking acetic acid as an exciting agent. The research and development of the filling material not only can realize large-scale safe consumption and resource utilization of the multi-element coal-based solid waste and effectively alleviate the environmental pollution problem caused by the multi-element coal-based solid waste, but also can realize backfilling of the goaf and effectively prevent a series of environmental and economic problems caused by goaf collapse.

Description

technical field [0001] The invention relates to the field of mine filling materials, in particular to a multi-component coal-based solid waste composite acid-activated underground filling material and a preparation method thereof. Background technique [0002] In recent years, with the rapid development of coal mining, coal-fired power generation and coal chemical industry, while supporting and promoting the rapid development of the eastern and national economies, it has also left a huge amount of coal-based solid waste in major mining areas, mainly including gas Chemical slag, coal gangue, fly ash, desulfurization gypsum, furnace bottom slag, etc. The Lianghuai mining area is one of the major coal production bases in the country. The rapid development of the coal, electricity and chemical industry has produced a large amount of solid waste. The comprehensive utilization rate of solid waste is low, a large amount of land is occupied, and the environment is seriously polluted...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/04C04B24/04C04B18/12C04B18/10C04B18/08C04B18/06
CPCC04B28/04C04B24/04C04B18/12C04B18/10C04B18/08C04B18/065C04B2111/00724C04B22/145Y02W30/91
Inventor 黄国栋杨科陈登红李梦容赵婧雅许颖
Owner INST OF ENERGY HEFEI COMPREHENSIVE NAT SCI CENT (ANHUI ENERGY LAB)
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