Process directly for producing concrete with residual ash slag after separating domestic garbage

Abstract

The invention relates to a method for directly using residual ash slag to produce cement after domestic wastes are sorted. The method comprises the following steps: firstly, sorting the domestic waste; secondly, sorting the deodorization and the sterilization of the residual slag; thirdly, aging the ash slag; fourthly, determining the admixing amount of the ash slag; fifthly, calcining in a kiln;sixthly, calcining agglomerate materials obtained and mixing with gypsum for grinding in water, and finally producing the cement. The method adopted has the following advantages that firstly, the residual ash after domestic wastes are sorted is directly used for producing the cement, thereby changing the wastes to valuables, saving the valuable clay resources and coal resources; secondly, large funds required for embedding and incinerating the domestic wastes is reduced, and the treatment cost of the domestic wastes is reduced; thirdly, harmful ingredients during the process of the domestic wastes can be effectively eliminated, thereby ensuring the clean production and the discharge up to standard; and fourthly, any harmful effect on the quality of cement products can be generated. Through repeated test, the residual ash after the domestic wastes are sorted can be directly added to a cement kiln for producing, thereby saving large funds, and having no effect on the quality of the cement products.

Description

technical field [0001] The invention relates to a method of using the residual ash after sorting domestic garbage as one of the raw materials to directly produce cement. Background technique [0002] With the continuous development of the economy, the disposal of municipal solid waste has been paid more and more attention by people. At present, the basic treatment methods of domestic waste in my country are mainly landfill and incineration. Among them, the landfill method of garbage dumping needs to occupy a large amount of valuable land resources; the incineration of garbage by incineration will produce a large amount of smoke and dust and incineration ash, and the smoke and dust need to be treated. The incineration ash can be used to produce cement clinker, which has the following Disadvantages: (1) Incineration of garbage requires a special incinerator; (2) Incineration of garbage generally requires the addition of additional fuel, which increases unnecessary expenses; (...

AI Technical Summary

Problems solved by technology

Among them, the landfill method of garbage dumping needs to occupy a large amount of valuable land resources; the incineration of garbage by incineration will produce a large amount of smoke and dust and incineration ash, and the smoke and dust need to be treated. The incineration ash can be used to produce cement clinker, which has the following Disadvantages: (1) Incineration of garbage requires a special incinerator; (2) Incineration of garbage generally requires the addition of additional fuel, which increases unnecessary expenses; (3) The removal system of harmful components such as dioxins in smoke and exhaust gas is complex and requires investment High cost

[0004] At present, there are also documented methods of using municipal solid waste to burn cement, but most of them are used in conjunction with a waste incinerator and a cement rotary kiln. In this way, the temperature reached by the incinerator cannot effectively remove the waste gas. Harmful gases such as dioxins, which pollute the environment more seriously

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