THE PROCESS FOR EXTRACTING GOLD IN ARSENIC-CONTAINING CONCERNTRATE OF GOLD AND THE EQUIPMENT THEREOF

Title:

THE PROCESS FOR EXTRACTING GOLD IN ARSENIC-CONTAINING CONCERNTRATE OF GOLD AND THE EQUIPMENT THEREOF

Document Type and Number:

WIPO Patent Application WO/2004/035844

Kind Code:

A1

Abstract:

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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Inventors:

LUO WENZHOU (CN)

Application Number:

PCT/CN2003/000856

Publication Date:

April 29, 2004

Filing Date:

October 14, 2003

Export Citation:

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Assignee:

BEIJING GOLDTECH CO LTD (CN)
LUO WENZHOU (CN)

International Classes:

C22B1/02; C22B11/02; C22B30/04; C22B19/18; (IPC1-7): C22B11/02; C22B30/04

Foreign References:

CN1363696A	2002-08-14
CN2335974Y	1999-09-01
CN1189540A	1998-08-05
CN1045379A	1990-09-19
CN1184856A	1998-06-17

Attorney, Agent or Firm:

KINGSOUND & PARTNERS (Suite 502 China Commerce Tower No. 5 Sanlihe East Roa, Xicheng District Beijing 5, CN)

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