Chemistry of inorganic compounds – Treating mixture to obtain metal containing compound – Group viib metal
Patent
1992-09-21
1993-12-14
Andrews, Melvyn J.
Chemistry of inorganic compounds
Treating mixture to obtain metal containing compound
Group viib metal
266179, C22B 102, F27B 904
Patent
active
052700224
ABSTRACT:
Reduction roasting of manganese ore is the first step in the extraction of the metal, production of manganese based chemicals and benefaction of ferruginous manganese ores. In comparison to the conventional processes, the invented process replaces the expensive petroleum based reductant injected with air by cheap solid carbonaceous material and sealing of air entry. In the invented process the manganese ore, solid carbonaceous reductant and water are mixed. The mixture is formed into a bed on a grate. The top surface is ignited to incandescence while maintaining suction below the grate and then the top surface is sealed against entry of air while continuing the suction. The combustion of the solid reductant proceeds drawing the oxygen from the ore itself, resulting in high reduction. The product is cooled either by direct water quenching or by indirect means. The equipment employed is either a batch type pot or a continuous strand with sealing devices and material handling systems.
REFERENCES:
patent: 2750274 (1956-06-01), Lellep
patent: 4010236 (1977-03-01), Welsh
Kothari Sudhakar V.
Subramanian Nilkantha A.
Andrews Melvyn J.
Paramount Sinters Private Limited
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