Roasting of mixed sulphide ores or concentrates

Details Roasting of mixed sulphide ores or concentrates Roasting of mixed sulphide ores or concentrates

1983-03-03

1984-10-23

Heller, Gregory A.

Chemistry of inorganic compounds

Treating mixture to obtain metal containing compound

Group iva metal

423 99, 423100, 75 7, C01G 1706, C22B 102

Patent

active

044787944

ABSTRACT:
In the roasting (oxidation) of mixed zinc sulphide/lead sulphide concentrates, to give an oxidic product for reduction, improved sulphur elimination and reduced lead volatilization are achieved by mixing 2-20% by weight of zinc oxide with the mixed sulphide materials, forming pellets of 2-15 mm diameter and roasting these under controlled oxidation conditions, firstly at a lower temperature and then at a higher temperature; preferably at 850.degree.-950.degree. C. for the first stage and at 950.degree.-1050.degree. C. for the last stage.

REFERENCES:
patent: 1749125 (1930-03-01), Brinker
patent: 2039645 (1936-05-01), Hechenbleikner
patent: 4231791 (1980-11-01), Charles
patent: 4274878 (1981-06-01), Charler
Sellwood, The Mining Journal, pp. 434-435, (1960).

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