Method for producing cement clinker by utilizing red mud

Abstract

The invention relates to a method for producing cement clinker by utilizing red mud. The method mainly comprises the following processes of: transporting dealkalization red mud into a stirring tank through a discharge transportation pipeline, wherein the concentration of the dealkalization red mud is about 30%, the temperature is about 85 DEG C, the content of Na2O is below 1%; adding 7-8% of dealkalization gypsum and 2-3% of coal ash in the dealkalization red mud, evenly mixing the three materials in the stirring tank, and simultaneously adding water so that the concentration of the mixture is regulated to 30%; carrying out press filtration with a plate and frame high-pressure filter press so that the content of water in the red mud produced after press filtration is less than 25%; feeding the mixture into a rotary kiln with a belt conveyer for calcination, wherein the process firing temperature of the clinker is 1200-1250 DEG C, and firing time is about 80 minutes; after the cement clinker is fired, carrying out forced cooling on the fired cement clinker by adopting a traditional grate cooler; and when the clinker is cooled below 300 DEG C, the cement clinker can be subjected to quality control and put in storage. The method has the advantages that the process is advanced, energy is saved, and the comprehensive utilization rate of the red mud is greatly improved.

Description

technical field [0001] The invention relates to a cement production method, in particular to a process for producing cement clinker by using red mud. Background technique [0002] The traditional method of producing cement is to calcinate limestone and clay together. This method consumes a lot of coal resources as well as raw materials. According to statistics, the production of one ton of cement by this traditional method consumes about 120-130 kilograms of coal. , at the same time, limestone will decompose a large amount of C0 in the process of calcination and decomposition 2 Gas, increased carbon emissions, serious air pollution. The existing technology uses the patented technology of red mud to produce cement, and most of them are produced by the full wet method. Due to the high humidity of the red mud, the heat energy consumption required for the production of wet mud is large, and the red mud is also prone to hardening during the production process. . CN 1613809A re...

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Problems solved by technology

This technology also has the problems of low utilization rate of red mud and large energy consumption.

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