Specialized metallurgical processes – compositions for use therei – Processes – Electrothermic processes
Patent
1984-07-17
1985-06-25
Andrews, Melvyn J.
Specialized metallurgical processes, compositions for use therei
Processes
Electrothermic processes
75 77, 75 88, 75 63, C22B 702
Patent
active
045252084
ABSTRACT:
A method of recovering Zn and Pb from iron and steel dust wherein the interior of a rotary smelting furnace connected to the discharge side of a rotary kiln is heated by a burner disposed on the outlet side of the rotary smelting furnace; a heating gas is introduced into the rotary kiln to subject the iron and steel dust containing Zn and Pb which was fed in the rotary kiln to a preliminary reduction with the aid of a reducing agent and, if required, a flux so as to volatilize Zn and Pb; and the product of the rotary kiln is fed into the rotary smelting furnace with addition of a flux to melt the resultant mixture and further volatilize Zn and Pb entrained in the product.
REFERENCES:
patent: 2045639 (1936-06-01), Eulenstein et al.
patent: 4209322 (1980-06-01), Janssen et al.
patent: 4396424 (1983-08-01), Yatsunami et al.
Harada Hiromi
Ishikawa Yukio
Mori Yoshiaki
Ojima Yasuo
Yasukawa Motohiro
Andrews Melvyn J.
Sumitomo Metal Mining Company Limited
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