C - Chemistry – Metallurgy – 22 – B
Patent
C - Chemistry, Metallurgy
22
B
39/13, 53/351
C22B 5/08 (2006.01) C22B 5/00 (2006.01) C22B 15/00 (2006.01) C22B 15/06 (2006.01)
Patent
CA 1072343
ABSTRACT OF THE DISCLOSURE A process and device for suspension smelting of finely- divided sulfidic and/or oxidic ores or concentrates are dis- closed, wherein a suspension of the finely-divided raw material in an oxygen containing gas is directed downwards as a suspension in a reaction zone formed jointly by the suspension and a melt below it, in order to oxidize and partially melt the raw mater- ial in suspension, whereafter the suspension flow is caused to change its flow direction perpendicularly sidewards so that most of the raw material particles present in the suspension flow impinge against the surface of the accumulated melt in the lower part of the suspension reaction zone, and the remaining suspen- sion flow is directed into a rising-flow zone, and the solids are separated. In order to improve the energy economy of the suspension smelting and to increase the capacity, the tempera- ture of the particles falling downwards in the suspension reac- tion zone is regulated so that the change in the heat content of the particles impinging against the melt covers the heat quantity required by the endothermal reactions occurring in the melt and together with the change in the heat content of the gas replaces the thermal losses of the furnace.
230816
Aaltonen Olavi A.
Juusela Jyrki T.
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