Abstract Chile is host to one of the most considerable Cu resources in the world. The primary source of Cu is from porphyry deposits. However, associated “exotic-Cu” deposits are also significant in the Atacama Desert of northern Chile. The critical processing issue for these ores is that they are refractory to dissolution under acidic and oxidative conditions, and consequently their dissolution kinetics are relatively slow. This paper reports a study on the extraction of copper and manganese from exotic-Cu ores using cane molasses as a reducing agent in the presence of chloride ions and diluted sulfuric acid media. The effects of concentrations of cane molasses, chloride ion, and sulfuric acid are discussed. Leaching tests on ground ore in shake flasks were studied, as well as the agglomeration and curing stages of a coarse ore sample. The dissolution of the exotic copper ore is enhanced when 50 g/L of NaCl and 60 g/L of cane molasses are added to the leaching solution. The dissolution of copper associated with copper wad appears independent of the Mn dissolution. Tests with the ore agglomerated with acid, chloride ions, and cane molasses showed enhanced dissolution of manganese contained in the copper wad, but not copper. It is thus confirmed that cane molasses is a suitable reductant in the leaching of Mn, especially in the presence of chloride ions. The behavior and fate of the wad-associated copper requires further investigation.

中文翻译：

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使用甘蔗糖蜜作为还原剂，在酰氯介质中从外来铜矿中同时回收铜和锰

摘要 智利拥有世界上最丰富的铜资源之一。铜的主要来源是斑岩矿床。然而，相关的“奇异铜”矿床在智利北部的阿塔卡马沙漠中也很重要。这些矿石的关键加工问题是它们在酸性和氧化条件下难以溶解，因此它们的溶解动力学相对较慢。本文报道了在氯离子和稀硫酸介质存在下，使用甘蔗糖蜜作为还原剂从奇异铜矿石中提取铜和锰的研究。讨论了甘蔗糖蜜、氯离子和硫酸浓度的影响。研究了摇瓶中磨碎矿石的浸出试验，以及粗矿石样品的结块和固化阶段。当在浸出液中加入 50 g/L NaCl 和 60 g/L 甘蔗糖蜜时，外来铜矿的溶解得到增强。与铜块相关的铜的溶解似乎与 Mn 的溶解无关。对用酸、氯离子和甘蔗糖蜜团聚的矿石进行的测试表明，铜团中所含锰的溶解增强，但铜没有。因此证实甘蔗糖蜜是浸出锰的合适还原剂，尤其是在氯离子存在的情况下。与棉有关的铜的行为和命运需要进一步调查。对用酸、氯离子和甘蔗糖蜜团聚的矿石进行的测试表明，铜团中所含锰的溶解增强，但铜没有。因此证实甘蔗糖蜜是浸出锰的合适还原剂，尤其是在氯离子存在的情况下。与棉有关的铜的行为和命运需要进一步调查。对用酸、氯离子和甘蔗糖蜜团聚的矿石进行的测试表明，铜团中所含锰的溶解增强，但铜没有。因此证实甘蔗糖蜜是浸出锰的合适还原剂，尤其是在氯离子存在的情况下。与棉有关的铜的行为和命运需要进一步调查。