Direct Flotation Technology of Low Grade Copper Oxide Ore with High Slime in Tonglushan Mine

Since the problem of mineral processing of low grade copperoxideorewithhighslimeinTonglushan Mine has not yet been solved , large amount of ores are piled or discarded . The direct flotation process for these types of ores is studied by authors . In the reagent regime,sodium sulfide , modified xanthate (KD4) and chelating collector (W7) are used together . The good quality copper concentrate can be obtained from the ores containing 0.96% Cu (the oxidation rate of Cu is 98% and the occupation rate of unseparable Cu is 28% ) and 0.75 g/t Au ( inclusion Au is 23% ) . The grades of the concentrate are 30.30% Cu and 23.30 g/t Au with the recovery of Cu 66.09% and of Au 66.22% respectively . Futher recovering iron concentrate from copper tailings,the iron concentrate with the grade 62.62% Fe and the recovery of Fe 68.94% can be obtained . The problem of the comprehensive utilization of the low grade copper oxide ore is better solved .