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进行与金冶金有关的矿物学研究,通常是查找用氰化法或其它方法浸出时造成金回收率低的原因。在下列情况下常常获得低回收率:①以“不可见金”形式存在的自然金被不溶性矿物包裹;②自然金被沉淀物覆盖;③含金产物在氰化物溶液中不溶解;④矿石中的炭质物吸附金;⑤伴生矿物分解并消耗氰化物。难处理物料样品的含金量常常很低,从这种样品中发现微量矿物的可能性小,所以用光学显微镜很难从样品中找到含金矿物。发现含金矿物的可能性随含金矿物的颗粒尺寸变小和样品含金量降低而变小。研究了某些提高寻找金粒成功率的方法:①富集重矿物;②制备特殊光薄片;③用图象分析仪扫描;④溶解伴生的硅酸盐和硫化矿物。
Performing mineralogy related to gold metallurgy is often the reason for finding low gold recovery rates when leaching with cyanidation or other methods. Low recoveries are often achieved when: (1) Natural gold in the form of “invisible gold” is surrounded by insoluble minerals; (2) Natural gold is covered by sediments; (3) Gold-containing products do not dissolve in the cyanide solution; Of the carbonaceous material adsorbed gold; ⑤ associated mineral decomposition and consumption of cyanide. Samples of difficult-to-handle materials are often low in gold and less likely to be found in such samples, so it is difficult to find gold-bearing minerals from the sample with an optical microscope. The possibility of finding gold-bearing minerals diminishes as the grain size of the gold-bearing minerals decreases and the gold content of the sample decreases. Some methods to improve the success rate of finding gold particles were studied: ① enrichment of heavy minerals; ② preparation of special light chips; ③ scanning by image analyzer; ④ dissolution of associated silicates and sulphide minerals.