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公开(公告)号：US20170349484A1
公开(公告)日：2017-12-07
申请号：US15512686
申请日：2015-09-14
IPC分类号： C04B5/00 , B02C23/14 , C04B18/14 , B07C5/344 , B02C23/20 , B02C21/00 , B07B1/36 , B02C23/38 , B02C23/10 , C21C5/36
CPC分类号： C04B5/00 , B02C11/08 , B02C21/00 , B02C23/10 , B02C23/14 , B02C23/20 , B02C23/38 , B07B1/36 , B07B2201/04 , B07C5/344 , B07C2501/0036 , C04B18/14 , C04B18/142 , C21C5/36 , C21C2005/363 , Y02W30/94
摘要： The present invention relates to a process and to a system for eliminating the expandability of steel-plant slag, which comprises a primary crusher (3) to reduce the fragments according to their granulometry; a magnetic separator (4) to remove metallic fragments bigger than a determined granulometry (5); a rotary dryer (6) to dry slag free from bigger metallic fragments; an impact mill (11) to disaggregate and fragment slag particles that are bigger than a predetermined granulometry; a classifier (12) for aero-classification and drag of fine and superfine particles; a cooler (17) for cooling slag particles bigger than a predetermined granulometry by means of heat exchange and removal of the fine and superfine particles that were not collected by the impact mill (11); a vibrating sieve (21) provided with two or more decks (23, 24, and 25) with screens of predetermined sizes; low-intensity magnetic separators (26, 27 and 28), with generation of non-magnetic slag fractions free from metallic iron and from iron monoxide, and of magnetic fractions composed by metallic iron and iron monoxide; and low-intensity magnetic separators (35, 36 and 37) to reprocess the magnetic fractions with generation of concentrate with high metallic iron contents and a product with high concentration of iron monoxide.
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