Method for preparing cement clinker by utilizing sludge

Abstract

The invention relates to a method for preparing cement clinker by utilizing sludge. The method mainly comprises the steps of preparing materials, mixing materials, prilling, drying roasting, and the like, the key is to choose silicon ash and zeolite paste as auxiliary raw materials to be mixed with discharged sludge of a sewage treatment plant, then technical components act with one another, SiO2, Al2O3 are combined with SO3, a part of silicate ionic group is replaced by sulfate ionic group, and therefore, the solution rate can be slowed down and the problem of large water consumption of the previous sludge-type cement is solved. When the cement clinker prepared by the sludge with the method is compared with the existing produced high-temperature cement clinker, 80% of energy can be saved, and CO2 discharge can be reduced by 85%. The method conforms to national recycling cyclic development of waste residue of sludge, and the like and is beneficial to new technology and new material changing waste material to things of environmental policy.

Description

technical field [0001] The invention relates to a method for making cement clinker by using sludge as a main raw material, which is a new method for directly harmlessly treating sludge and other waste residues, and belongs to the field of environment-friendly cement. Background technique [0002] In my country, with the development of large-scale industrial projects and the large-scale construction of urban sewage treatment plants, the domestic sewage treatment of urban and rural residents has been improved, but the large amount of sludge produced has also continued to increase. In the past, landfill, incineration and other treatment methods for sludge were simplified, but they still had a certain impact on environmental quality. Therefore, the work of harmless sludge treatment is imminent. [0003] Judging from the situation at home and abroad, the recent research on the technology of producing cement with sludge as product materials, including "sewage cement slag cement an...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the above-mentioned existing technical defects of using sludge to produce cement products, and to provide a technical problem that can solve the problem of high water demand of standard consistency, so that the setting time is also improved, and the working degree of cement concrete can be further satisfied. Method for making cement clinker from sludge using requirements

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