Steel manufacturing dust solidified, process for producing the same and production apparatus therefor

Abstract

This process for producing a steel manufacturing dust solidified includes placing dust (10) containing steel as a main component that occurs in a steel manufacturing process in cylindrical mold (8) and applying pressure to thereby obtain solidified dust (B). This steel manufacturing dust solidified (B) is in the form of a briquette, which has, for example, a columnar form whose cross section configuration is circular. The dimension thereof is, for example, 50 to 100 mm in diameter and 30 to 80 mm in height. The steel manufacturing dust (10) may have carbon, aluminum, etc. occurring in the steel manufacturing process mixed thereinto as a binder. The production apparatus therefor includes the mold (8), lid member (9) closing one side thereof and plunger (11) that is inserted in the mold (8).

Description

FIELD OF THE INVENTION [0001] The present invention relates to a steel manufacturing dust solidified, a manufacturing process and a manufacturing apparatus therefor, for enabling dust, occurring during an iron and steel manufacturing process with a melting furnace or the like, to be reused as a steel manufacturing raw material. BACKGROUND ART [0002] During the iron and steel manufacturing process, dry dust, which occurs as a result of coagulation of generated vapors, is generated in, for example, a melting furnace and is recovered by a dust collector. Since this dust contain iron as a principal component, the reuse thereof is desirable. However, since the iron and steel dust, when charged into the melting furnace in the form as it stands, tends to be scattered afloat and is again recovered by the dust collector, the reuse thereof is difficult. For this reason, it has hitherto been disposed by filling up in land, but the amount of generation of the iron and steel dust in Japan reache...

AI Technical Summary

Benefits of technology

[0019] If it is of a type provided with the mold in the form of the cylindrical chamber, the lid member and the plunger, even with only the iron and steel dust, molding can be accomplished easily by pressing with a high pressure and charging of the iron and steel dust and discharge of the steel manufacturing dust solidified are easy to achieve. Where the mold is of a vertically oriented type and the lid member is positioned on a lower side, charging of the iron and steel dust and discharge of the steel manufacturing dust solidified can be

Problems solved by technology

However, since the iron and steel dust, when charged into the melting furnace in the form as it stands, tends to be scattered afloat and is again recovered by the dust collector, the reuse thereof is difficult.

For this reason, it has hitherto been disposed by filling up in land, but the amount of generation of the iron and steel dust in Japan reaches hundreds of thousand ton per year so long as an electric furnace dust is concerned and disposal by filling up in land is undesirable in terms of degradation of the environment of the land to be filled up and the effective utilization of resources.

The above described pelletizing method is such that since pellets formed are in the form of particulates of a diameter within the range o

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