Technique for heating liquid steel scoria

Abstract

The invention discloses a thermal-braise technique for liquid steel slag, which pours liquid steel slag into a thermal-braise tank directly for treatment, and the specific working procedure is: extending the bottom of the thermal-braise tank equally with dry steel slag with the thickness of 190 to 230 mm, pouring the produced liquid steel slag while making steel into the thermal-braise tank, the amount of the poured liquid steel slag is 10 to 12 percent of the gross cubage of the thermal-braise tank; spraying water into the thermal-braise tank immediately after the liquid steel is poured into the tank to ensure the surface of the liquid steel slag to form crust immediately; the manipulator looses the crusted steel slag until the liquid slag appears, and then restarts the water-spraying procedure to loose the steel slag; the final part is temperature-reducing procedure, and opens the cover to discharge the slag after aerating for 25 to 35 minutes. The technique of the invention finishes the whole process from liquid steel slag to steel slag grain in the thermal-braise tank, which primarily puts an end to the problem that liquid steel slag pollutes environment seriously, furthermore, the fine crushing degree of steel slag finally formed by the technique of the invention is excellent, and the self-crushing effect of steel slag in the fine crushing process is excellent, thereby leading the metal recovery rate of the steel slag to be improved about 18 percent compared with the prior art.

Description

technical field [0001] The invention relates to iron and steel smelting production technology, which is a liquid steel slag thermal braising process. Background technique [0002] There are many methods for the treatment of steel slag in this field: water quenching method, hot pouring method, wind quenching method, granulation wheel method, etc. Most of the treatment methods are the treatment after the liquid steel slag forms a solid state, that is, the use of liquid The treatment is also due to the poor fluidity of the slag (after the steelmaking process is improved, the consistency of the slag is getting higher and higher), it is impossible to realize all treatment (the processing ratio is low, generally about 10%), and the safety is also poor (once the liquid steel slag If it enters the water and is surrounded by water, it will cause an explosion). Some recently authorized hot slag treatment methods also deal with solid slag. At present, all hot steel slags are treated ...

AI Technical Summary

Problems solved by technology

The disadvantages of the liquid steel slag treatment method are: it occupies a large area, and the dust pollutes the environment seriously. It is a serious pollution problem that is difficult to solve in the steelmaking industry. At the same time, the large pieces of steel slag produced also increase the difficulty of subsequent processing.

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