Method for producing low-temperature cement clinker from straw ash

Abstract

A method for producing low-temperature cement clinker by using straw ash according to the present invention mainly comprises such steps as material preparation, batching and balling, steam curing and low-temperature calcining, and grinding. Cement having low-temperature cement clinker that rivals cement having silicate cement clinker can be produced by using the dry and wet straw ash as the main raw material and using steel slag and aluminum slag as the auxiliary material. This cement has multiple features such as high cement strength, desirable concrete compatibility, good abrasion resistance, low heat of hydration, micro expansion, good frost resistance, and good corrosion resistance, and can be directly used in building construction such as dams, underwater projects, roads, bridges, and civil projects. The production method of the cement has the advantages such as a simple and proper process, low energy consumption, high benefit, low investment, and no secondary pollution, and further facilitates the environment protection. In comparison with the existing production method of common cement, the production method of the present invention saves the investment by 80%, reduces the cost of the cement by 60%, reduces the energy consumption by 80%, decreases the CO2 emission by 80%, and can greatly consume the straw ash and other industrial waste slag, thereby reducing environmental pollution. The production method of the present invention is a good method capable of turning waste into treasure and facilitating the environment protection.

Description

technical field [0001] The invention is a method for producing a new type of low-temperature cement clinker by using straw ash, steel slag and aluminum slag, especially for the current power plants using various plant stalks, such as rice straw, wheat straw, rice husk, corn stalk, soybean stalk, The dry and wet waste residues discharged from burning wood top bark and other power generation are called straw ash. Using advanced technology to produce a new type of low-temperature cement clinker, the straw ash is a kind of harmless treatment method, which belongs to green environmental protection or cement field. Background technique [0002] From the domestic and international situation, the United States began to develop and utilize straw ash in the 1970s, followed by Japan, Australia, New Zealand, India, Thailand and other countries that studied straw ash and used it to mix cement and concrete admixtures. Studies have reported that the utilization is about 60%. At present, ...

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Problems solved by technology

[0004] The purpose of the present invention is to solve the problem that the above-mentioned straw ash will cause serious pollution to air and water sources, and to provide a kind of advanced and reasonable technology, low energy consumption, high benefit, low investment, no secondary pollution, and beneficial to the large-scale use of straw ash. Method for producing low-temperature cement clinker from environmentally friendly straw ash

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