用X射线辐射分选机预选某金铜共生矿石

赤峰金厂沟梁金矿石中的金主要与黄铜矿共（伴）生。根据矿石这一特点，对碎至150～0 mm矿石中150～90、90～30 mm粒级进行了X射线辐射预选试验，分离阈值按铜含量来选取。结果显示：150～90 mm粒级1粗1扫分离阈值分别为0.1和0.07时，可获得Cu品位为1.26%、Au品位为9.80 g/t、Cu回收率为96.27%、Au回收率为90.61%的预选精矿；90～30 mm粒级1粗1扫分离阈值分别为0.06和0.04时，可获得Cu品位为1.32%、Au品位为6.77 g/t、Cu回收率为98.69%、Au回收率为96.75%的预选精矿；全流程预选抛尾产率达35.08%。这说明，金主要与黄铜矿共（伴）生时，可用铜含量来确定X射线辐射分选机富集金时的分离阈值。

Pre-concentration of a Au-Cu Associated Ore with X-ray Radiation Separator

Gold in Gouliang gold ore of Chifeng gold plant is mainly associated with chalcopyrite. According to this characteristics of the ore，pre-concentration tests by X-ray radiation were carried out to select the separation threshold values according to the copper content for the particle sizes of 150~90 mm，90~30 mm after the ore was crushed to 150~0 mm. The results demonstrated that when the separation threshold value for 150~90 mm ore is 0.1 and 0.07 respectively，with one roughing and one scavenging，Cu grade of 1.26%，Au grade of 9.80 g/t，Cu recovery of 96.27% and Au recovery of 90.61% were obtained. When the separation threshold value for 90~30 mm ore is 0.06 and 0.04 respectively，with one roughing and one scavening,Cu grade of 1.32%，Au grade of 6.77 g/t，Cu recovery of 98.69% and Au recovery of 96.75% were obtained by preconcentration. The yield of pre-concentration reached 35.08%. The tests results indicated that Au is mainly associated with chalcopyrite，the separation threshold can be determined according to the copper content.