某高硫高砷含碳金矿石金品位为4.21 g/t,含砷0.82%、含碳0.85%,呈细粒、微细粒嵌布。硫化物包裹金和裸露金占总金的98.31%,金多分布于黄铁矿与石英、绢云母等脉石矿物连生体中。为回收利用矿石中的金,分别进行直接氰化浸出、预处理—氰...某高硫高砷含碳金矿石金品位为4.21 g/t,含砷0.82%、含碳0.85%,呈细粒、微细粒嵌布。硫化物包裹金和裸露金占总金的98.31%,金多分布于黄铁矿与石英、绢云母等脉石矿物连生体中。为回收利用矿石中的金,分别进行直接氰化浸出、预处理—氰化浸出、浮选—预处理—氰化浸出试验。结果表明,直接氰化浸出、预处理—氰化浸出金回收指标均较差;原矿经一段磨矿(-0.074 mm 90%)—1粗3精2扫浮选—二段磨矿(-0.038 mm 93%)—1粗3精2扫闭路浮选—尾矿预处理—氰化浸出选别,浮选可获得金品位23.36 g/t、含银96.00 g/t的金精矿,金精矿回收率为67.22%,金浸出率23.36%,金总回收率达90.58%,指标较好,可作为该金矿石选矿工艺流程。展开更多
The utilization of arsenic-containing gold dressing tailings is an urgent issue faced by gold production companies worldwide.The thermodynamic analysis results indicate that ferrous arsenate(FeAsO_(4)),pyrite(FeS_(2))...The utilization of arsenic-containing gold dressing tailings is an urgent issue faced by gold production companies worldwide.The thermodynamic analysis results indicate that ferrous arsenate(FeAsO_(4)),pyrite(FeS_(2))and sodium cyanide(NaCN)in the arsenic-containing gold metallurgical tailings can be effectively removed using straight grate process,and the removal of pyrite and sodium cyanide is basically completed during the preheating stage,while the removal of ferrous arsenate requires the roasting stage.The pellets undergo a transformation from magnetite to hematite during the preheating process,and are solidified through micro-crystalline bonding and high-temperature recrystallization of hematite(Fe_(2)O_(3))during the roasting process.Ultimately,pellets with removal rates of 80.77% for arsenic,88.78% for sulfur,and 99.88% for cyanide are obtained,as well as the iron content is 61.1% and the compressive strength is 3071 N,meeting the requirements for blast furnace burden.This study provides an industrially feasible method for treating arsenic-containing gold smelting tailings,benefiting gold production enterprises.展开更多
文摘某高硫高砷含碳金矿石金品位为4.21 g/t,含砷0.82%、含碳0.85%,呈细粒、微细粒嵌布。硫化物包裹金和裸露金占总金的98.31%,金多分布于黄铁矿与石英、绢云母等脉石矿物连生体中。为回收利用矿石中的金,分别进行直接氰化浸出、预处理—氰化浸出、浮选—预处理—氰化浸出试验。结果表明,直接氰化浸出、预处理—氰化浸出金回收指标均较差;原矿经一段磨矿(-0.074 mm 90%)—1粗3精2扫浮选—二段磨矿(-0.038 mm 93%)—1粗3精2扫闭路浮选—尾矿预处理—氰化浸出选别,浮选可获得金品位23.36 g/t、含银96.00 g/t的金精矿,金精矿回收率为67.22%,金浸出率23.36%,金总回收率达90.58%,指标较好,可作为该金矿石选矿工艺流程。
基金Project(52274343)supported by the National Natural Science Foundation of ChinaProjects(2023YFC3903900,2023YFC3903904)supported by the National Key R&D Program of China。
文摘The utilization of arsenic-containing gold dressing tailings is an urgent issue faced by gold production companies worldwide.The thermodynamic analysis results indicate that ferrous arsenate(FeAsO_(4)),pyrite(FeS_(2))and sodium cyanide(NaCN)in the arsenic-containing gold metallurgical tailings can be effectively removed using straight grate process,and the removal of pyrite and sodium cyanide is basically completed during the preheating stage,while the removal of ferrous arsenate requires the roasting stage.The pellets undergo a transformation from magnetite to hematite during the preheating process,and are solidified through micro-crystalline bonding and high-temperature recrystallization of hematite(Fe_(2)O_(3))during the roasting process.Ultimately,pellets with removal rates of 80.77% for arsenic,88.78% for sulfur,and 99.88% for cyanide are obtained,as well as the iron content is 61.1% and the compressive strength is 3071 N,meeting the requirements for blast furnace burden.This study provides an industrially feasible method for treating arsenic-containing gold smelting tailings,benefiting gold production enterprises.
