Specialized metallurgical processes – compositions for use therei – Processes – Producing or treating free metal
Reexamination Certificate
2007-03-16
2009-10-06
Wyszomierski, George (Department: 1793)
Specialized metallurgical processes, compositions for use therei
Processes
Producing or treating free metal
C075S724000, C420S590000, C205S589000, C205S596000
Reexamination Certificate
active
07597738
ABSTRACT:
A process for the production of ferro-nickel or nickel matte from a product liquor solution containing at least nickel, cobalt, iron and acid soluble impurities, said process including the steps of: (a) contacting the product liquor solution (7) containing the nickel, cobalt, iron and acid soluble impurities with an ion exchange resin (8), wherein the resin selectively absorbs nickel and iron from the solution leaving the cobalt and the acid soluble impurities in the raffinate (9); (b) stripping the nickel and iron from the resin with a sulfuric acid solution to produce an eluate (11) containing nickel and iron; (c) neutralising the eluate to precipitate a mixed nickel iron hydroxide product (13); and (d) reducing and smelting the mixed nickel iron hydroxide product to produce ferro-nickel (29) or nickel matte (24).
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Duarte Alexey
Liu Houyuan
Meihack Wolf
Ratchev Ivan P.
BHP Billiton SSM Technology Pty Ltd.
Brinks Hofer Gilson & Lione
McGuthry-Banks Tima M
Nichols G. Peter
Wyszomierski George
LandOfFree
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