Method for manufacturing cement using a raw material mix including finely ground steel slag
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United States of America Patent
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Dec 10, 2002
Grant Date -
N/A
app pub date -
May 26, 1999
filing date -
Sep 18, 1998
priority date (Note) -
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Abstract
A method is provided for manufacturing cement from a raw material mixture which includes finely ground steel slag. Selected quantities of steel slag and other raw materials are mixed with each other and supplied to a raw mill. The steel slag and other raw materials are preferably ground to a fine, dry powder. For some applications, the dry powder is preferably supplied to a blend tank for further mixing to ensure more uniform commingling of the finely ground steel slag with other finely ground raw materials. The fine dry powder may be supplied to a preheat system and then to the feed end of a kiln. Alternatively, the dry powder may be supplied directly to the feed end of a kiln.
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