Device and method for slag afterheat self-decomposition

Abstract

A steel slag self-slaking device using residual heat and pressure comprises: a residual heat self-slaking tank body (1), a tank gate (2), a slag vessel (3) used for containing steel slag, a slag vessel support (4) used for supporting the slag vessel (3), a slag-conveying track (5), a sprayer (6) on the top of the inner wall of the tank body (1), controlling apparatus (7) on the inner wall of the tank body (1) used for controlling pressure self-slaking process. A self-slaking method using residual heat and pressure comprises: pushing the slag vessel (3) containing steel slag at a certain temperature into the residual heat self-slaking tank body (1), spraying water to the hot slag by the sprayer (6) to crush the surface of the steel slag, wherein the vapor produced after spraying water forms a pressure in the tank to further crack and pulverize the slag pieces. The method can stablize and pulverize steel slag in a short time, can achieve a good pulverization effect and can slake free CaO in the steel slag adequately.

Description

Technical field [0001] The present invention involves the use of residual heat use, solid waste treatment and resource utilization technology in the process of steel metallurgy, especially the transfer of steel residue treatment generated by the turntable during the turntable steelmaking process.Essence Background technique [0002] At present, there are many ways to treat steel residue, including thermal, hot dwelling method, water quenching method, wind quenching method, roller granification method, and grain wheel method.The thermal method is to pour the melting liquid steel residue in the hot field, cooled naturally by drilling or air, and then crushed and magnetic selection; the hot stuffy method is to pour the melting liquid steel slag in the hot stuffy pond and cool through the water.After the steel residue is powdered, it is broken and magnetic selection; the water quenching method is to dump the melting liquid steel residue, cool the melting steel residue with high press...

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Problems solved by technology

Problems to be solved in this process: the low treatment rate of steel slag is generally below 50%, and there is still a large amount of dry slag discharged; the power consumption of system equipment is high, the failure rate of equipment is high, and the investment is large; steel slag is not easy to be crushed and granulated. The equipment is severely worn, and the steel balls inside are often replaced

The granulation wheel process is to transport the liquid steel slag to the processing workshop, use a crane to slowly lift the slag tank, pour it into the high-speed rotating granulation wheel, break and granulate the steel slag, spray water to cool it, and then fall into the pool. After being treated by granulation wheel water quenching method, the particle size is small, the steel slag crystallizes densely, it is difficult to grind finely, and its gelling performance becomes poor, which affects the application of steel slag in the building material industry

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