B - Operations – Transporting – 02 – C
Patent
B - Operations, Transporting
02
C
B02C 23/08 (2006.01) B02C 23/10 (2006.01) B03C 1/00 (2006.01) C01G 49/02 (2006.01) C21B 13/00 (2006.01) C22B 1/00 (2006.01) C22B 7/00 (2006.01)
Patent
CA 2309611
The present invention relates to upgrading iron ore to decrease the amount of nonferrous materials therein, and to thereby increase the iron content thereof. More particularly, the invention relates to a process utilizing magnetic fields (20, 50, 140) to separate a feed stream into magnetic fractions (30, 60, 150) and nonmagnetic fractions (40, 70, 160). Inventive processes maybe advant ageously used to separate a significant amount of nonmagnetic material such as silica or pyrolusite, from valuable iron oxide in an iron ore or iron ore concentrate. The invention therefore finds advantageous use to provide an improved source of iron oxides for high purity uses such as, for example, direct reduction processes and heavy media coal beneficiation processes.
La présente invention concerne la valorisation d'un minerai de fer, consistant à réduire sa teneur en matériaux non ferreux et donc à accroître la teneur en fer dudit minerai. En particulier, l'invention concerne un procédé utilisant des champs magnétiques (20, 50, 140) pour séparer un flux d'alimentation en fractions magnétiques (30, 60, 150) et en fractions non magnétiques (40, 70, 160). Les procédés de l'invention peuvent être utilisés avantageusement pour séparer une quantité importante de matériau non magnétique, telle que silice ou pyrolusite, de l'oxyde de fer utile dans un minerai de fer ou un concentré de minerai de fer. L'invention tire avantageusement profit d'une source améliorée d'oxydes de fer destinés à des usages haute pureté, tels que par exemple, des procédés de réduction directe et des procédés d'enrichissement du charbon en milieu dense.
Iron Dynamics Inc.
Smart & Biggar
LandOfFree
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