C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
241/142, 53/20,
C22B 1/00 (2006.01) C22B 7/00 (2006.01)
Patent
CA 1037720
Abstract of the Disclosure Process for recovering high-grade blast furnace iron or other metal from pieces of blast furnace iron or such other metal and blast furnace slag having large amounts of such blast furnace slag, by tumbling a substantial number of such pieces to achieve a constant redistribution thereof while impacting at least a substantial portion of such pieces with a high velocity, relatively small diameter shot or grit which has a hardness which is greater than the hardness of the slag, thereby abrading the impurity, while leaving the body of non-impurity substantially intact. A product comprising a large body of high-grade blast furnace iron or other metal and having a substantial number of superficial irregularities, crevices and fissures containing only a small amount of blast furnace slag adhered in said irregularities, crevices and fissures, the amount of blast furnace slag being no more than about ten percent by weight of the total product, and preferably no more than about two to three percent by weight of such product. - 1 -
212887
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