Preparation method of modified coal cinder and application thereof

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...

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 poor

[0006] At present, shale bricks made of cinders are mainly used as thermal insulation wall materials, but due to poor strength, poor frost resistance, poor durability, and poor anti-corrosion performance of shale bricks, there are few research applications in the field of permeable bricks.