Pretreatment of refractory gold-bearing sulfur concentrates by microwave roasting
Author(s): CHEN Wei, DING De-xin, HU Nan, LI Feng
Pages: 2000-2005
Year: 2015 Issue: 7
Journal: The Chinese Journal of Nonferrous Metals
Keyword: gold-bearing sulfur concentrate; gold; microwave roasting; pretreatment; leaching rate; surface morphology;
Abstract: After roasting refractory gold-bearing sulfur concentrates by microwave, the influences of microwave power, the ore mass and roasting time on sample mass loss rate and leaching rate were investigated. The results show that sample mass loosing rate is 28.12% and iodide leaching rate is 71.56% after 900 g raw ore is roasted for 50 min at power of 16 kW, and the leaching rate after microwave pretreatment increases greatly than that of raw ore rate (9.82%). With the XRD and SEM technology analyzing mineral composition and surface morphology, roasted sample is more beneficial to leaching than raw ore because of ore inside becoming loose and generating plenty of pores.
Pages: 2000-2005
Year: 2015 Issue: 7
Journal: The Chinese Journal of Nonferrous Metals
Keyword: gold-bearing sulfur concentrate; gold; microwave roasting; pretreatment; leaching rate; surface morphology;
Abstract: After roasting refractory gold-bearing sulfur concentrates by microwave, the influences of microwave power, the ore mass and roasting time on sample mass loss rate and leaching rate were investigated. The results show that sample mass loosing rate is 28.12% and iodide leaching rate is 71.56% after 900 g raw ore is roasted for 50 min at power of 16 kW, and the leaching rate after microwave pretreatment increases greatly than that of raw ore rate (9.82%). With the XRD and SEM technology analyzing mineral composition and surface morphology, roasted sample is more beneficial to leaching than raw ore because of ore inside becoming loose and generating plenty of pores.
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