DRY PROCESSING METHOD AND SYSTEM FOR CONVERTER SLAG IN COPPER SMELTING
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United States of America Patent
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Issued Date -
Mar 29, 2012
app pub date -
May 11, 2011
filing date -
Sep 27, 2010
priority date (Note) -
Abandoned
status (Latency Note)
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Abstract
The present invention provides a processing method for converting slag ejected from a converter in a copper smelting process to raw materials for iron manufacture. The processing method is for converter slag containing 1 mass % or more of Cu produced in a copper smelting process. The processing method comprises a step of charging the converter slag in a reduction furnace, and a step of conducting a heat reduction of a zinc content and a copper content contained in the slag and removing a reduced zinc by volatilization in the reduction furnace. The removal of the reduced zinc by volatilization is conducted in a condition in which an air fuel ratio of a volume of air blowing to an input of a reductant is controlled to 0.25 to 1.0.
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