用X射线辐射分选机预选某金铜共生矿石

摘要

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 caried 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.%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 ～30mm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 ～90mm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l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6.77g/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.