Increasing the gold cyanide leaching rate from two -stage calcine generated the refractory ore containing arsenopyrite and pyrrhotite roasted
Affiliation of Author(s):
冶金工程学院
Key Words:
中文关键字：包裹金；赤铁矿；预处理；，英文关键字：locked gold; Hematite; Pretreating; Two-stage calc
Abstract:
For the gold locked within hematite in the two-stage calcine, which leads to a low gold leaching rate, present work is aiming at pretreating the calcine to selectively dissolve hematite. The calcine was pretreated by sulfuric acid with cosolvent B. The factors influencing the hematite dissolution rate were studied, the pretreatment parameters considered were H2SO4 content, B dosage and added time, leaching temperature and time. Simultaneously, mineralogy analysis of the calcine, H2SO4 pretreatment residue and cyanide leaching residue were also carried out. Results indicate that the hematite dissolution rate is quicker, the dissolution temperature is lower and the dissolution time is shorter in the role of cosolvent B than without B. At the same time, the gold locked within hematite is effectively released, so the leaching rate of gold cyanide increases about 10% than actual factory production. The results have an actual significance in guiding industrial production.
Co-author:
DANGXiao-e,KEWen-shuai,TANG–chen,LV-Jun,ZHO
Paper Publications
