硫化铜与含钴黄铁矿低碱度分离新工艺研究

New Mineral Processing Research on the Separation Between Copper Sulphide and Cobalt-bearing Pyrites under a Low Alkalinity

针对海南某铜钴硫矿床,通过对其进行工艺矿物学研究查清其有用矿物的赋存状态和嵌布特征,并依此确定其最终的选矿工艺流程和药剂制度。研究表明,原矿中的钴矿物主要以晶格取代的形式赋存于黄铁矿和毒砂之中,试验针对其工艺矿物学特性采用铜钴硫混合浮选流程,混合精矿再分离得到铜精矿和硫精矿,其中钴矿物大部分进入硫精矿之中,实现了对有价金属最大限度的回收。铜硫分离使用石灰+SH组合抑制剂,SH可部分替代石灰实现在较低碱度条件下对黄铁矿的抑制作用。

Through mineralogical studies of a copper - cobalt sulfide deposit in Hainan Province to identify the occur- rence and embedded characteristics of useful materials, its final mineral processing flowsheet and the reagent system can be determined. Studies have shown that cobalt minerals of the ores are mainly in occurrence states in pyrite and arsenopyrite in the form of lattice substitution. Considering its mineralogical characteristics, mixed flotation process of the copper and cobalt sulfuide ores is applied in the experiment. Copper and sulfur concentrates are obtained resul- ting from separation of mixed concentrate and most of cobalt minerals enter into sulfur concentrate, achieving the max- imum recovery of valuable metals. Lime ＋ SH combined inhibitors are used in the separation of copper and sulphur, and SH can partly replace lime to achieve separation operation under lower alkalinity conditions.