Method for preparing aerated concrete product from solid wastes in calcium carbide industry

Abstract

The invention relates to the technical field of resource and environmental protection, in particular to a method for preparing aerated concrete product from solid wastes in calcium carbide industry. Incinerated ash obtained after incineration of waste residues semi-coke powder, fly ash and purified ash produced in the calcium carbide industry, gypsum, aluminum powder, cement and a binder are usedas production materials, the aerated concrete product is prepared with the preparation method including steps of incineration, mixing, stirring, pouring, procuring, cutting, steam-pressure in a kettle, cooling out of the kettle and performance detection, a lot of waste substances produced by the calcium carbide industry in the production process is effectively treated, ash recycling is realized, secondary pollution of ash to atmosphere and underground water in piling and disposition processes is eliminated, the blank of comprehensive utilization of waste substance produced by the current calcium carbide industry is filled up, three waste substances are incinerated, effective chemical components of incineration ash are used to prepare aerated concrete, and recycling of industrial solid wastes is realized.

Description

technical field [0001] The invention relates to the technical field of resource environmental protection, in particular to a method for preparing aerated concrete products from calcium carbide industrial solid waste. Background technique [0002] Calcium carbide is an important basic chemical industry raw material, mainly used in the organic synthesis industry and the manufacture of acetylene, and is widely used in light industry, metallurgy, medicine, textile, machinery and other industries. In recent years, China's calcium carbide has developed rapidly and has become the world's largest production and consumption country, with production capacity accounting for more than 90% of the world's total production capacity. The mainstream process of industrial production of calcium carbide is the electrothermal method, that is, the raw materials quicklime and coke are added to the calcium carbide furnace, and the calcium carbide furnace generates a high-temperature environment thr...

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Problems solved by technology

Traditional aerated concrete is divided into cement-lime-fly ash, cement-lime-sand, cement-slag-sand and other systems according to raw materials. The preparation method spends a lot of cost, and the economic benefit is low

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