The production indexes of a gold mine are unsatisfactory,the comprehensive recovery rate of beneficiation-metallurgy is low,the inorganic carbon and carbonate gangue minerals in flotation concentrate have a great impact on the cost of pre-acidification process so the enterprise fails to maximize the economic benefits. Flotation tests of concentrates with different yields are carried out to investigate the process indexes under the corresponding yields;at the same time,pressure pre-oxidation-cyanide leaching tests are carried out after proportioning of the flotation concentrates to study the influence of concentrates with different yields on the acidification cost of pre-acidification process. The results show that:when the flotation concentrate yield is 35.24％,the gold grade of the concentrate is 12.13g/t,the gold recovery rate is 90.64％,and the gold grade of the tailings is 0.68g/t;the cost of pre-acidification process is optimal by using the concentrate with this yield for pressure oxidization after proportioning,and the comprehensive recovery rate of beneficiation-metallurgy can reach 85.42％,which is up by 5.27％,and the enterprise can increase the efficiency by about 37.4282 million yuan per year. This study provides technical support for the production organization of the enterprise.
关键词
全硫浮选/加压预氧化/氰化浸出/选冶回收率/经济效益
Key words
all-sulfide flotation/pressure pre-oxidation/cyanide leaching/recovery of beneficiation-metallurgy/economic benefits
维普
万方数据