Recovery of useful materials from calcines

Details Recovery of useful materials from calcines Recovery of useful materials from calcines

C - Chemistry, Metallurgy

22

B

53/220, 53/369

C22B 7/00 (2006.01) C22B 3/06 (2006.01) C22B 60/02 (2006.01)

Patent

CA 1102142

TITLE A process for the recovery of useful materials from calcines. ABSTRACT OF THE DISCLOSURE The invention concerns the recovery of non-ferrous metals, such as gold, uranium or the like from iron oxide containing calcines which have the non-ferrous metal present in solid solution and/or encapsulated within the iron oxide. The calcine is reacted, while stirring vigorously, with sulphuric acid or another strong inorganic acid to cause the iron to form the ferric salt. The material obtained is mixed with water and the liquid and solid phases are separated from each other. The non-ferrous metal is then obtained from at least one of these phases by leaching, or the like. -1a-

313915

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