The leaching of manganese from pyrolusite ore by pyrite
作者:
G. Thomas,
B. J. P. Whalley,
期刊:
The Canadian Journal of Chemical Engineering
(WILEY Available online 1958)
卷期:
Volume 36,
issue 1
页码: 37-43
ISSN:0008-4034
年代: 1958
DOI:10.1002/cjce.5450360104
出版商: Wiley Subscription Services, Inc., A Wiley Company
数据来源: WILEY
摘要:
AbstractA new method of leaching low‐grade manganese ore (<5% Mn) utilizing pyrite as a reagent was developed. By heating an aerated slurry of ore and pyrite and by recycling the leach liquor at controlled acidity to attack fresh ore, a manganous sulphate solution free of iron was obtained which when heated to about 175°C., yielded manganous sulphate monohydrate. During the leaching process, iron in the liquor was alternately oxidized by the pyrolusite and reduced by the pyrite. In an alternative leaching procedure, the heating of an aqueous slurry of pyrite in an autoclave first under oxygen pressure and then in the absence of oxygen produced an acidic ferrous sulphate solution suitable for the subsequent leaching of pyrolusite ore at ambient temperatur
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