Bulut Gülay
Istanbul Technical University, Mining Engineering Department, Mineral and Coal Processing Section, Maslak-Istanbul, Turkey.
Waste Manag Res. 2006 Apr;24(2):118-24. doi: 10.1177/0734242X06063350.
About 2.5 million tonnes of copper smelter slag are available in Küre, northern part of Turkey. This slag contains large amounts of metallic values such as copper and cobalt. A representative slag sample containing 0.98% Cu, 0.49% Co and 51.47% Fe was used in the experimental studies. Two different methods, direct acid leaching and acid baking followed by hot water leaching were used for recovering Cu and Co from the slag. The effects of leaching time, temperature and acid concentration on Cu- and Co-dissolving efficiencies were investigated in the direct acid leaching tests. The optimum leaching conditions were found to be a leaching time of 2 h, acid concentration of 120 g L(-1), and temperature of 60 degrees C. Under these conditions, 78% Cu and 90% Co were extracted. In the acid baking + hot water leaching tests, 74% Co was dissolved after 1 h of roasting at 200 degrees C using a 3:1 acid:slag ratio, whereas the Cu-dissolving efficiency was 79% and the total slag weight loss was approximately 50%.
在土耳其北部的屈雷有大约250万吨铜冶炼炉渣。这种炉渣含有大量的金属价值元素，如铜和钴。实验研究中使用了一个代表性的炉渣样本，其含0.98%的铜、0.49%的钴和51.47%的铁。采用两种不同方法从炉渣中回收铜和钴，即直接酸浸法和酸焙烧后热水浸出法。在直接酸浸试验中研究了浸出时间、温度和酸浓度对铜和钴溶解效率的影响。发现最佳浸出条件为浸出时间2小时、酸浓度120克/升、温度60摄氏度。在这些条件下，78%的铜和90%的钴被提取出来。在酸焙烧+热水浸出试验中，使用3:1的酸:渣比例，在200摄氏度下焙烧1小时后，74%的钴被溶解，而铜的溶解效率为79%，炉渣总重量损失约为50%。
