Composite cement producing process with flyash in great mixed amount

Abstract

The present invention is composite cement producing process with flyash in great mixed amount, and aims at solving the problems of flyash to occupy land and pollute environment, cement production of Portland cement clinker to produce great amount of CO2 and have high cost, etc. The composite cement producing process includes producing flyash polymerizing material with flyash, grinding assistant,calcium nitrate, caustic soda and anhydrous sodium sulfate and through grinding; crushing clinker; and producing cement product with clinker, flyash, gypsum, flyash polymerizing material and mineral slag. Using great amount of flyash in producing cement can reduce environmental pollution and lower cement producing cost.

Description

technical background [0001] The invention belongs to a cement production method, in particular to a method for producing composite cement with a large amount of fly ash. Background technique [0002] Fly ash is a waste material discharged from coal-fired thermal power plants or thermal power plants. There are many coal-fired thermal power plants and coal-fired thermal power plants in northern my country, so the discharge of fly ash is very large. From the perspective of Liaoning Province alone, the annual ash discharge is more than 10 million tons, and the accumulation over the years has exceeded million tons, while the utilization rate of fly ash is only about 20%. A large amount of fly ash is discharged without any effective treatment, occupying cultivated land, polluting water sources, and polluting the environment. Turning waste into treasure is a serious issue that nature presents to us. At present, due to technical limitations, there has been no major breakthrough in t...

AI Technical Summary

Problems solved by technology

At present, due to technical limitations, there has been no major breakthrough in the large-scale reuse of fly ash

On the other hand, the production of the six general-purpose cements in my country requires Portland cement clinker, and every ton of Portland cement clinker produced emits 0.9 tons of carbon dioxide into the atmosphere, and the cost is relatively high.