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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 low strength of concrete building materials, high carbon content of coal gasification slag, and low comprehensive utilization rate, so as to reduce the overall moisture content and improve the solidification strength , the effect of low water content

Active Publication Date: 2022-05-24
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

Examples

Experimental program
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Effect test

Embodiment 1

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

[0050] Step 1, take by weight the total amount of 60 parts of coal gasification slag respectively, wherein the coarse slag and fine slag mass ratio is 7:3, the coarse slag and the fine slag are mixed and stirred for 5min, and 11 parts of halogen chips are weighed, Add to the mixed coal gasification slag, stir for 5min, and let stand for 30min to obtain 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 of step 1, and stir for 10min to obtain the mixture II;

[0052] Step 3, weigh 15 parts of fly ash by weight, add it to the mixture II in step 2, and stir for 10 min to obtain the mixture III;

[0053] Step 4: Weigh 12.5 parts of light-burned magnesium powder by weight, add it to the mixtur...

Embodiment 2

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

[0056] Step 1, take by weight the total amount of 70 parts of coal gasification slag respectively, wherein the coarse slag and fine slag mass ratio is 7:3, the coarse slag and the fine slag are mixed and stirred for 5min, and 8 parts of halogen chips are weighed, Add to the mixed coal gasification slag, stir for 10min, and let stand for 30min to obtain Mixture I;

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

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

[0059] Step 4: Weigh 10 parts of light-burned magnesium powder by weight,...

Embodiment 3

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

[0062] Step 1, take by weight the total amount of 85 parts of coal gasification slag respectively, wherein the coarse slag and fine slag mass ratio is 8:2, the coarse slag and the fine slag are mixed and stirred for 10min, and 5 parts of halogen chips are weighed, Add to the mixed coal gasification slag, stir for 10min, and let stand for 30min to obtain 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 them to the mixture I of step 1, and stir for 10min to obtain the mixture II;

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

[0065] Step 4: Weigh 7.3 parts of light-burned magnesium powder by weight, add it into the m...

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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 light-burned magnesium powder, 5-15 parts of halogen flakes, 0.05-0.5 parts of modifier, 0.1-1 part of water-based copolymer material emulsion, 0‑5 parts water. The method of the invention can solve the problems that the coal gasification slag has high carbon and water content and is difficult to utilize, and can dissipate the coal gasification slag solid waste on a large scale. It is economical and easy to operate, environmentally friendly, and has wide application prospects.

Description

technical field [0001] The invention belongs to the technical field of building materials, and in particular relates to concrete made of magnesium oxychloride cement to solidify coal gasification slag 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; the large amount of gasification slag storage and landfill has caused serious environmental pollution and waste of land resources. The sustainable development of the enterprise is adversely affected, and the resource treatment of gasification slag is imminent. [0003] Coal gasification slag can be divided into two categories: coarse slag (gasification furnace slag) and fine slag (black water filter cake). In the entrained bed, the coal powder and the gasification agent undergo combustion and gasification reaction in the furnace, and some...

Claims

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Application Information

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Patent Type & Authority Patents(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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