Preparation method of modified coal cinder and application thereof

A technology of cinder and modification, applied in the field of construction, can solve the problems of poor corrosion resistance, poor frost resistance, and reduced strength

Active Publication Date: 2020-10-20
GUIZHOU CONSTR SCI RES & DESIGN INST OF CSCEC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The patent is to prevent the bricks from being loose and porous by adding potassium chloride, and to keep the bricks light and strong by adding wood chips; but this patent keeps the bricks light and strong by adding wood chips, and the strength is reduced, and the corrosion resistance is po

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1 modified cinder 1

[0030] A preparation method of modified coal slag, comprising the following steps:

[0031] (1) Acidification modification: Take the cinder produced by the gasification furnace, add 3 times the compound acid solution to the cinder, grind it to make a cinder mixture, then add a reinforcing agent with 3% of the cinder mass, and then heat to 80-90°C and stir to react After 1.5 hours, rinse with water and dry at 50-60°C to obtain solidified modified cinder;

[0032] (2) Surface modification: put the solidified modified cinder into the surface modification solution with 5 times its mass, treat it with 40W ultrasonic wave at 30-40°C for 15min, filter out, and dry to obtain the surface modified cinder;

[0033] (3) Blend modification: add reinforcing fiber and coupling agent to surface modified cinder, stir at 80-90°C for 20min, and dry to obtain modified cinder.

[0034] Contain 8% hydrochloric acid, 3% nitric acid in the described complex a...

Embodiment 2

[0038] Embodiment 2 modified cinder 2

[0039] A preparation method of modified coal slag, comprising the following steps:

[0040] (1) Acidification modification: Take the cinder produced by the gasification furnace, add 3 times the compound acid solution to the cinder, grind it to make a cinder mixture, then add a reinforcing agent with a mass of cinder of 3.2%, and then heat to 80-90°C and stir to react After 2 hours, rinse with water and dry at 50-60°C to obtain solidified modified cinder;

[0041] (2) Surface modification: Put the solidified modified cinder into the surface modification solution with 5 times its mass, and treat it with 40W ultrasonic wave at 30-40°C for 18min, filter out, and dry to obtain the surface modified cinder;

[0042] (3) Blend modification: add reinforcing fiber and coupling agent to the surface modified cinder, stir at 80-90°C for 25 minutes, and dry to obtain modified cinder.

[0043]The compound acid solution contains 10% hydrochloric acid ...

Embodiment 3

[0047] Embodiment 3 modified cinder 3

[0048] A preparation method of modified coal slag, comprising the following steps:

[0049] (1) Acidification modification: Take the cinder produced by the gasification furnace, add 3 times the compound acid solution to the cinder, grind it to make a cinder mixture, then add a reinforcing agent with 4% of the cinder mass, and then heat to 80-90°C and stir to react After 2 hours, rinse with water and dry at 50-60°C to obtain solidified modified cinder;

[0050] (2) Surface modification: Put the solidified modified cinder into the surface modification solution with 5 times its mass, and treat it with 40W ultrasonic wave at 30-40°C for 20 minutes, filter it out, and dry it to obtain the surface modified cinder;

[0051] (3) Blend modification: add reinforcing fiber and coupling agent to surface modified cinder, stir at 80-90°C for 30min, and dry to obtain modified cinder.

[0052] The compound acid solution contains 10% hydrochloric acid ...

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Abstract

The invention belongs to the technical field of buildings, and particularly relates to a preparation method of modified coal cinder and an application thereof. The composite acid solution is adopted to treat coal cinder, part of aluminum oxide, magnesium oxide and the like in the coal cinder can be dissolved in the composite acid solution, the aluminum oxide and the magnesium oxide in the composite acid solution react with zircon powder and boron powder and then are solidified and adsorbed in a pore structure of the coal cinder, the sintering performance of the coal cinder is improved, and thesintering strength of the coal cinder is improved; then surface modification liquid is adopted for modification, so that the dispersing performance of coal cinder can be improved; then the reinforcing fibers and a coupling agent are blended for modification, the reinforcing fibers are grafted into the coal slag under the action of the coupling agent, and the frost resistance and corrosion resistance of the coal slag are improved. The strength, frost resistance, dispersity, sinterability and other properties of the coal cinder subjected to acid modification, surface modification and blending modification are obviously improved, and the coal cinder can be used for preparing water-permeable shale bricks. The prepared water-permeable shale brick has good water permeability, frost resistance and corrosion resistance, and is high in strength.

Description

technical field [0001] The invention belongs to the technical field of construction, and in particular relates to a preparation method and application of modified coal slag. Background technique [0002] The coal chemical industry plays an important role in my country's chemical industry. At the same time, the environmental protection pressure faced by the coal chemical industry is also increasing, and the problems of comprehensive utilization of resources and "three wastes" treatment have become increasingly prominent. [0003] Gasification slag, referred to as coal slag, is the solid residue after coal is burned and gasified in the gasifier. The coal slag produced by the gasifier is mainly composed of SiO 2 、Al 2 o 3 , Fe 2 o 3 , CaO, MgO, etc., which belong to general solid waste. Gasification slag accounts for more than 90% of the total coal chemical waste residue. Realizing the comprehensive utilization of gasification slag resources is of great significance to t...

Claims

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Application Information

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IPC IPC(8): C04B33/135C04B33/13C04B38/10C04B38/08C04B38/02
CPCC04B33/13C04B33/04C04B33/1355C04B38/10C04B2235/96C04B2235/3218C04B2235/3212C04B38/08C04B38/02Y02P40/60
Inventor 陈尚伟朱国良帅海乐崔晨聂晓鹏杨兴廖昶陈亦苏罗通周灵何信周徐立斌李泽钢
Owner GUIZHOU CONSTR SCI RES & DESIGN INST OF CSCEC
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