Thermal beneficiation of low grade ferruginous Manganese ores

Sankaran, C and Sen, M C and Bhatnagar, P P (1962) Thermal beneficiation of low grade ferruginous Manganese ores. NML Technical Journal, 4 (2). pp. 26-33.

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The low-grade high phosphorus ferruginous ores in which iron is either chemically combined with manganese or very finely distributed, cannot generally be upgraded by conventional ore-dressing techniques. The paper examines theoretical considerations involved in the thermal beneficiation of ferruginous ores whereby iron and phosphorus are preferentially reduced to the metallic state in gas or oil-fired furnaces. Two low grade manganese ores have been studied by thermal beneficiation. It has been observed that at 1300-1400°C it is possible to enrich the manganese: iron ratio in slag to 15-20:1 from the initial value of 4:1. The slag, however, contains considerable quantities of silica and can be suitably treated for making low carbon ferro-manganese. The paper records the results of effect of different variables such as temperature, quantity of reducing agent and time in the thermal beneficiation of low grade Indian manganese ores. (Messrs C. Sankaran, Junior Scientific Assistant, M.C. Sen, Senior Scientific Officer and P.P. Bhatnagar, Assistant Director, National Metallurgical Laboratory)

Item Type:Article
Official URL/DOI:
Uncontrolled Keywords:low-grade high phosphorus ferruginous ores; gas-fired furnaces; oil-fired furnaces; low grade manganese ores; thermal beneficiation
Divisions:Director Office
ID Code:1460
Deposited By:Dr. A K Sahu
Deposited On:10 Aug 2010 16:54
Last Modified:07 Nov 2012 10:41
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