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The process for extracting gold in arsenic-containing concentrate of gold and the equipment thereof
The process for extracting gold in arsenic-containing concentrate of gold and the equipment thereof
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机译：含砷金精矿中金的提取方法及其设备
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摘要
A process for extracting gold from arsenic-containing concentrate, including heat and keep the smelting chamber to a temperature of 100-300 °C under the reduced pressure lower than 50 Pa to remove the water vapor and some dust in the concentrate; then heat and keep the temperature of the melting chamber and condensing chamber to 300-500 °C to remove volatile arsenic sulfide; maintain the condensing chamber temperature while heating and keeping the temperature of the smelting chamber to 500-600 °C to remove the decomposed gas sulfur; heat the smelting chamber to 600-760 °C but reduce the temperature of condensing chamber to 270-370 °C and keep them still to obtain arsenic; now stop heating and introduce gas, take off the enriched slag in which arsenic is degraded, and extract gold in common process. The present invention also provides an equipment for carrying out the said process which comprises a heating device, a smelting device, a temperature-keeping condenser, a liquid-pressure-driven discharging device, a dust collector, an automatic temperature-controlling device, a vacuum measure device and a vacuum pump. The present invention reduces arsenic pollution and solves the long-term problem for safe production.
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