Method of recovering Fe from steel-making slag
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United States of America Patent
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May 16, 2017
Grant Date -
Jan 8, 2015
app pub date -
Mar 28, 2014
filing date -
Jul 4, 2013
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Abstract
A method of recovering Fe from steel-making slag is disclosed. The method includes the steps of melting steel-making slag having a higher Fe content than iron-making slag by heating the steel-making slag to a first temperature; cooling the molten slag to a second temperature that is lower than the first temperature and then maintaining the same at the second temperature for a predetermined time to thus precipitate Fe in the molten slag, thereby forming and growing an Fe-rich phase; rapidly cooling the slag to room temperature; and crushing the solidified slag and magnetically separating a magnetically-susceptible portion from a magnetically-unsusceptible portion.
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