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METHOD OF MODIFYING STEEL SLAG AND STEEL SLAG
PROBLEM TO BE SOLVED: To modify steel slag at low costs in a short time, without transfer, as it is at high temperatures.SOLUTION: Steel slag in a molten state is kept in high-temperature water of 50°C or higher for a specified time to modify it, and the steel slag of grain sizes of 30 mm or smaller is recovered. Preferably, the steel slag in a molten state is reduced in grain sizes, poured into the high-temperature water and kept in the high-temperature water for a specified time to modify it. The grain sizes may be reduced to 10 mm or smaller by causing water to collide with the steel slag in a molten state, or the grain sizes may be reduced to 5 mm or smaller by causing a gas to collide with the steel slag in a molten state. The procedure allows modification of the steel slag at low costs in a short time, without transfer, as it is at high temperatures.
【課題】製鋼スラグを高温のまま運搬することなく低コストで短時間に改質すること。【解決手段】溶融状態の製鋼スラグを５０℃以上の高温水中に所定時間保持して改質し、粒径が３０ｍｍ以下の製鋼スラグを回収する。溶融状態の製鋼スラグの粒径を小さくしてから高温水中に流し込み、５０℃以上の高温水中に所定時間保持して改質することが好ましい。その際、溶融状態の製鋼スラグに水を衝突させることにより粒径を１０ｍｍ以下にしてもよい。あるいは、溶融状態の製鋼スラグに気体を衝突させることにより粒径を５ｍｍ以下にしてもよい。これにより、製鋼スラグを高温のまま運搬することなく低コストで短時間に改質することができる。【選択図】なし
METHOD OF MODIFYING STEEL SLAG AND STEEL SLAG
PROBLEM TO BE SOLVED: To modify steel slag at low costs in a short time, without transfer, as it is at high temperatures.SOLUTION: Steel slag in a molten state is kept in high-temperature water of 50°C or higher for a specified time to modify it, and the steel slag of grain sizes of 30 mm or smaller is recovered. Preferably, the steel slag in a molten state is reduced in grain sizes, poured into the high-temperature water and kept in the high-temperature water for a specified time to modify it. The grain sizes may be reduced to 10 mm or smaller by causing water to collide with the steel slag in a molten state, or the grain sizes may be reduced to 5 mm or smaller by causing a gas to collide with the steel slag in a molten state. The procedure allows modification of the steel slag at low costs in a short time, without transfer, as it is at high temperatures.
【課題】製鋼スラグを高温のまま運搬することなく低コストで短時間に改質すること。【解決手段】溶融状態の製鋼スラグを５０℃以上の高温水中に所定時間保持して改質し、粒径が３０ｍｍ以下の製鋼スラグを回収する。溶融状態の製鋼スラグの粒径を小さくしてから高温水中に流し込み、５０℃以上の高温水中に所定時間保持して改質することが好ましい。その際、溶融状態の製鋼スラグに水を衝突させることにより粒径を１０ｍｍ以下にしてもよい。あるいは、溶融状態の製鋼スラグに気体を衝突させることにより粒径を５ｍｍ以下にしてもよい。これにより、製鋼スラグを高温のまま運搬することなく低コストで短時間に改質することができる。【選択図】なし
METHOD OF MODIFYING STEEL SLAG AND STEEL SLAG
製鋼スラグの改質方法および製鋼スラグ
KATO YUSUKE (author) / MIYATA YASUTO (author) / MATSUNAGA HISAHIRO (author) / HAYASHI AKIO (author)
2015-11-02
Patent
Electronic Resource
Japanese
IPC:
C04B
Kalk
,
LIME
/
C21B
Gewinnung von Eisen oder Stahl
,
MANUFACTURE OF IRON OR STEEL
/
C21C
Weiterverarbeiten von Roheisen, z.B. Feinen, Herstellen von Schweißeisen oder Stahl
,
PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL
/
F27D
Einzelheiten oder Zubehör für Industrieöfen, Schachtöfen, Brennöfen oder Retorten, soweit sie nicht auf eine Ofenart eingeschränkt sind
,
DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
METHOD FOR MODIFYING STEEL SLAG AND METHOD FOR MANUFACTURING STEEL SLAG
| European Patent Office | 2017