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Concrete mixture using magnesium oxychloride cement to solidify coal gasification slag and preparation method thereof

A technology of magnesium oxychloride cement and coal gasification slag, which is applied in the field of building materials, can solve the problems of high carbon content of coal gasification slag, low strength of concrete building materials, low comprehensive utilization rate, etc., so as to reduce the overall moisture content and improve the curing strength. , the effect of low water content

Active Publication Date: 2022-01-04
CHIA TAI ENERGY MATERIALS DALIAN
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the existing problems of high carbon content and high water content in coal gasification slag, high difficulty in utilization, low comprehensive utilization rate, low strength of prepared concrete building materials, and environmental impact caused by the use of Portland cement, and provides A concrete mixture that uses magnesium oxychloride cement to solidify coal gasification slag, which can utilize coal gasification slag to the greatest extent, and the prepared concrete building material has good performance and high strength, and meets actual needs. Does not require high temperature sintering, has important practical significance and practical value

Method used

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  • Concrete mixture using magnesium oxychloride cement to solidify coal gasification slag and preparation method thereof
  • Concrete mixture using magnesium oxychloride cement to solidify coal gasification slag and preparation method thereof
  • Concrete mixture using magnesium oxychloride cement to solidify coal gasification slag and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0049] The preparation method of the concrete mixture utilizing magnesium oxychloride cement to solidify coal gasification slag comprises the following steps:

[0050] Step 1: Weigh a total of 60 parts of coal gasification slag by weight, wherein the mass ratio of coarse slag to fine slag is 7:3, mix the coarse slag and fine slag and stir for 5 minutes, weigh 11 parts of halogen chips, Add to the mixed coal gasification slag, stir for 5 minutes, and let it stand for 30 minutes to obtain the mixture I;

[0051] Step 2: Weigh 0.1 part of trisodium phosphate, 0.1 part of citric acid and 0.3 part of styrene-butadiene rubber emulsion by weight, add them to the mixture I in step 1, stir for 10 minutes, and obtain the mixture II;

[0052] Step 3, taking 15 parts of fly ash by weight, adding it to the mixture II in step 2, and stirring for 10 minutes to obtain the mixture III;

[0053] Step 4: Take 12.5 parts of light-burned magnesium powder by weight, add it to the mixture III in st...

Embodiment 2

[0055] The preparation method of the concrete mixture utilizing magnesium oxychloride cement to solidify coal gasification slag comprises the following steps:

[0056] Step 1: Weigh a total of 70 parts of coal gasification slag by weight, wherein the mass ratio of coarse slag to fine slag is 7:3, mix the coarse slag and fine slag and stir for 5 minutes, weigh 8 parts of halogen chips, Add to the mixed coal gasification slag, stir for 10 minutes, and let it stand for 30 minutes to obtain the mixture I;

[0057] Step 2: Take 0.1 part of trisodium phosphate, 0.05 part of phosphoric acid, 0.15 part of oxalic acid and 0.3 part of polytetrafluoroemulsion by weight, add to the mixture I in step 1, stir for 10 minutes, and obtain the mixture II;

[0058] Step 3, take 11.4 parts of fly ash by weight, add to the mixture II in step 2, stir for 10 minutes, and obtain the mixture III;

[0059] Step 4: Take 10 parts of light-burned magnesium powder by weight, add it to the mixture III in s...

Embodiment 3

[0061] The preparation method of the concrete mixture utilizing magnesium oxychloride cement to solidify coal gasification slag comprises the following steps:

[0062] Step 1, weigh 85 parts of coal gasification slag in total by weight, wherein the mass ratio of coarse slag to fine slag is 8:2, mix the coarse slag and fine slag and stir for 10 minutes, weigh 5 parts of halogen chips, Add to the mixed coal gasification slag, stir for 10 minutes, and let it stand for 30 minutes to obtain the mixture I;

[0063] Step 2, weigh 0.1 part of sodium metaphosphate, 0.1 part of citric acid and 0.5 part of styrene-butadiene rubber emulsion by weight, add to the mixture I in step 1, stir for 10 minutes, and obtain the mixture II;

[0064] Step 3, take 2 parts of fly ash by weight, add to the mixture II in step 2, and stir for 5 minutes to obtain the mixture III;

[0065] Step 4: Take 7.3 parts of light-burned magnesium powder by weight, add it to the mixture III in step 3 in 2 times, and...

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Abstract

The invention discloses a concrete mixture using magnesium oxychloride cement to solidify coal gasification slag and a preparation method thereof, and belongs to the technical field of building materials, the concrete mixture using magnesium oxychloride cement to solidify coal gasification slag comprises the following components by weight: 50-85 parts of coal gasification slag, 1-30 parts of fly ash, 6-20 parts of caustic-burned magnesia powder, 5-15 parts of halogen sheets, 0.05-0.5 part of a modifier, 0.1-1 part of a water-based copolymer emulsion, and 0-5 parts of water. According to the method, the problems that the coal gasification slag is high in carbon content and water content and large in utilization difficulty can be solved, the coal gasification slag solid waste can be consumed on a large scale, the obtained concrete building material is high in early strength and continuously enhanced in later strength, the water consumption can be reduced, and the method has economical efficiency, simplicity and convenience in operation, environment friendliness and wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to concrete for solidifying coal gasification slag with magnesium oxychloride cement and a preparation method thereof. Background technique [0002] With the growth and development of the coal chemical industry, the discharge of gasification slag is increasing day by day, with an annual discharge of more than 50 million tons; a large amount of gasification slag has been stockpiled and landfilled, causing serious environmental pollution and waste of land resources. The sustainable development of enterprises is adversely affected, and the recycling of gasification slag is imminent. [0003] Coal gasification slag can be divided into two types: coarse slag (gasification slag) and fine slag (black water filter cake), which are solid residues formed with carbon particles remaining in the coal during the incomplete combustion of coal in the entrained bed. The pulve...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B28/32C04B18/06C04B111/20C04B111/27
CPCC04B28/32C04B18/065C04B2111/20C04B2111/27C04B2201/50C04B18/08C04B22/16C04B24/06C04B24/2676C04B22/165C04B24/04C04B24/24Y02W30/91
Inventor 赵博琪罗程张青龙杨旭王闯周彤袁龙朱明超
Owner CHIA TAI ENERGY MATERIALS DALIAN
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