摘要
The effect of temperature on leaching behavior of copper minerals with different occurrence states in complex copper oxide ores was carried out by phase analysis means of XRD, optical microscopy and SEM-EDS. The results indicated that at ambient temperature, the easily leached copper oxide minerals were completely dissolved, while the bonded copper minerals were insoluble. At lukewarm temperature of 40℃, it was mainly the dissolution of copper in isomorphism state. With increasing temperature to 60℃, the copper leaching rate in the adsorbed state was significantly accelerated. In addition, when the temperature increased to 80℃, the isomorphic copper was completely leached, leaving 11.2% adsorbed copper un-leached. However, the copper in feldspar-quartz-copper-iron colloid state was not dissolved throughout the leaching process. Overall, the leaching rates of copper in different copper minerals decreased in the order: malachite, pseudo-malachite > chrysocolla > copper-bearing chlorite > copper-bearing muscovite > copper-bearing biotite > copper-bearing limonite > feldspar-quartz-copper-iron colloid.
采用XRD、光学显微镜、SEM-EDS等物相分析手段,研究温度对复杂氧化铜矿中不同赋存状态铜矿物浸出行为的影响。结果表明:常温下易浸氧化铜矿物完全被浸出,而结合态铜矿物丝毫未被浸出;微温(40℃)下主要是类质同象铜的浸出;中温(60℃)时吸附态铜的浸出速率明显加快;达80℃时,类质同象铜完全浸出,但仍有11.2%的吸附态铜未被浸出。在整个浸出过程中,长石-石英-铜-铁胶体中的铜未被溶解。不同铜矿物的浸出速率大小如下:孔雀石、假孔雀石>硅孔雀石>含铜绿泥石>含铜白云母>含铜黑云母>含铜褐铁矿>长石-石英-铜-铁胶结体。
基金
Project(U1608254) supported by the Special Fund for the National Natural Science Foundation of China
Projects(ZJKY2017(B)KFJJ01,ZJKY2017(B)KFJJ02) supported by Zijin Mining Group Co.,Ltd.,China
