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首页> 外文期刊>Journal Of The South African Institute Of Mining & Metallurgy >Improvements in copper electrowinning at Tenke Fungurume Mining Company
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Improvements in copper electrowinning at Tenke Fungurume Mining Company

机译：Tenke Fungurume Mining Company的铜电解提取的改进

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Tenke Fungurume Mining Company (TFM), located in Katanga Province, Democratic Republic of Congo (DRC), began production of copper cathode and cobalt hydroxide in March 2009. Copper production capacity was 115 000 t/a utilizing a semi-autogenous grinding, agitated leach, counter-current decantation process followed by solvent extraction and electrowinning (SX-EW). Cobalt production capacity (as cobalt hydroxide) was 8000 t/a utilizing a three-stage purification/precipitation process treating raffinate from the copper SX-EW process. Recently a phase II expansion was completed, in which copper electrowinning capacity was doubled and four stages were added to the SX plant Corresponding enhancements were made to mining, milling, and processing to bring production to 195 kt/a copper and 15 kt/a cobalt. An additional sulphuric acid plant is currently being constructed, adding 1400 t/d sulphuric acid to bring total acid production to 2250 t/d for use in leaching at TFM.Initial copper electrowinning results were satisfactory, but cathode quality and current efficiency decreased as copper production increased. The Freeport-McMoRan (FCX) Technology Centre and TFM personnel began operation of two bench-scale copper electrowinning cells in the tankhouse to diagnose chemistry effects on the cathode and anode. The results indicated an excellent electrolyte chemistry, producing finely crystalline copper at 430 A/m~2 current density with 98% current efficiency. Attention next turned to the physical factors of the electrowinning cells, including electrode insulator geometry and performance. A demonstration cell was selected in the tankhouse and was operated with varying cathode and anode insulator geometries. Operation of the demonstration cell with a three-side cathode edge strip, A-style anode insulators, and an improved cell furniture design increased current efficiency from 77% to 89% at 400 A/m~2 current density. Cathode quality improved correspondingly. TFM is now operating at 92% current efficiency.
机译：Tenke Fungurume矿业公司（TFM）位于刚果民主共和国（DRC）的加丹加省，于2009年3月开始生产阴极铜和氢氧化钴。利用半自动磨削和搅拌技术，铜的生产能力为11.5万吨/年浸出，逆流倾析工艺，然后进行溶剂萃取和电解沉积（SX-EW）。利用三级纯化/沉淀工艺处理来自铜SX-EW工艺的提余液，钴的生产能力（作为氢氧化钴）为8000 t / a。最近，第二阶段的扩建工作已经完成，其中铜的电解提炼能力增加了一倍，SX工厂增加了四个阶段。相应地，采矿，制粉和加工工艺得到了相应的增强，使产量达到了195 kt / a铜和15 kt / a钴。 。目前正在兴建另一家硫酸厂，添加1400吨/天的硫酸使酸总产量达到2250吨/天，用于TFM的浸出。最初的铜电解沉积结果令人满意，但阴极质量和电流效率随着铜的降低而降低产量增加。 Freeport-McMoRan（FCX）技术中心和TFM人员开始在储罐中运行两个台式规模的电解铜电解槽，以诊断对阴极和阳极的化学作用。结果表明电解液化学性能优异，可在430 A / m〜2的电流密度下以98％的电流效率产生微晶铜。接下来，注意力转向电沉积电池的物理因素，包括电极绝缘体的几何形状和性能。在储罐中选择了一个演示单元，并在不同的阴极和阳极绝缘体几何形状下运行。具有三侧阴极边缘条，A型阳极绝缘体和改进的电池家具设计的演示电池的操作在400 A / m〜2的电流密度下将电流效率从77％提高到89％。阴极质量相应提高。 TFM现在以92％的电流效率运行。

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