Patent · US Expired

Reduction of laterite ores

US3985556A · kind A · utility

1Cited by

1References

6Claims

0Family size

Assignee

The United States of America, as represented by The Secretary of The Interior · US

Inventors

Richard E. Siemens · Albany, US
Philip C. Good · Albany, US

Key dates

Filing date	Mar 22, 1976
Grant date	Oct 12, 1976
Priority date	—
Expiry date	Mar 22, 1996

Classification

Technology area (CPC C)Chemistry; Metallurgy
CPC primaryC22B47/0027
WIPO fieldMaterials, metallurgy
WIPO sectorChemistry

Abstract

Lateritic nickel ores which also contain magnesia are subjected to a low temperature reduction using carbon monoxide as the sole reductant and are then subjected to a higher temperature heat treatment in an inert atmosphere for a time sufficient to stabilize the nickel in a readily extractable state. The reduction is accomplished at a temperature in the range of 300 to 450.degree.C and the heat treatment is carried out at a temperature above about 650.degree.C.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.