Process method for preparing similar cement clinkers by treating steel slag at thermal state in way of heat preservation

Abstract

The invention relates to a process method for preparing similar cement clinkers by treating steel slag at a thermal state in a way of heat preservation, which belongs to the application technology of the treatment of steel slag in metallurgical industries. The process method for treating the steel slag preparing class cement clinkers at the thermal state in the way of heat preservation comprises the following steps: (1) mixing a rectifying agent of silicon and aluminum and high-temperature converter steel slag generated in the steel-making process; (2) carrying out heat-preservation treatmenton the mixture of the rectifying agent of the silicon and the aluminum and the converter steel slag in the step (1); and (3) cooling to normal temperature quickly so as to obtain similar cement clinkers. In order to conveniently mix the rectifying agent of the silicon and the aluminum and the converter steel slag, the high-temperature converter steel slag can be poured into slag ladles, the rectifying agent of the silicon and the aluminum is added in a dispersing way in the pouring process, and the quality of the steel slag poured into each slag ladle and the variety and the quality of the added rectifying agent can be concretely regulated according to different slag ladles and process conditions. In order to better mix the rectifying agent and the converter steel slag for reacting, nitrogen gas can be blown into the bottoms of the slag ladles for stirring and homogenizing in the heat-preservation process. According to the method, the problem of low stability and activity of the steelslag can be simultaneously solved; and moreover, the process is simple, and the cost is low.

Description

technical field [0001] The invention belongs to the processing and application technology of steel slag in the metallurgical industry, and in particular relates to a process method for preparing cement-like clinker from steel slag by heat-preservation treatment. Background technique [0002] In recent years, as China's steel production has continued to rise, the production of steel slag, a by-product of the steelmaking process, has also increased dramatically. In 2008, China's steel slag output exceeded 100 million tons, but its utilization rate was only 40%. A large amount of steel slag is stored in the open air all the year round, which not only occupies a large amount of land, but also contains harmful elements such as soluble chromium ions, pollutes surface and underground water sources, and endangers people's lives. In addition, the world is currently facing the dilemma of resource shortage, and steel slag has become a kind of resource. It is of great significance to r...

AI Technical Summary

Problems solved by technology

[0005] In order to overcome the deficiencies of the above-mentioned prior art, the object of the present invention is to provide a process for preparing cement-like clinker from steel slag with thermal insulation treatment, which can solve the problems of low stability and low activity of steel slag at the same time, with simple process and low cost

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