Method for utilizing smelter waste containing zinc and other valuable metals
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United States of America Patent
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-
May 2, 1995
Grant Date -
N/A
app pub date -
Jan 6, 1994
filing date -
Jan 26, 1993
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
The invention relates to a method for utilizing zinciferous waste from metal smelters, such as steel smelters, so that the transmission of fluorides to the highly zinciferous secondary dusts is prevented during the treatment of the gas obtained from the waste smelting furnace. Fluorides are extremely harmful for the zinc process, and therefore it is important to prevent them from entering the process. By adjusting, according to the invention, the temperature and composition of the exhaust gases created in the smelting treatment of zinciferous dusts and other waste, the fluorides and the highly zinciferous fraction are obtained in different end products. Other valuable metals are recovered from the metal layer created on the bottom of the furnace.
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