Mechanism of gold collection in matte and distribution behavior of precious metals in oxygen-enriched smelting process 造锍捕金机理及富氧熔炼过程贵金属分配行为

Q3 Materials Science
Xueyi Guo, Wang Songsong, Wang Qinmeng, Q. Tian, Zhi Wang, Yongjun Wang, Guo-min Peng, B. Zhao
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引用次数: 1

Abstract

The distribution behavior of precious metals in high-temperature molten is affected by the thermodynamic properties of smelting systems and components. The capture of precious metals by high-temperature molten matte is beneficial to reduce the total Gibbs free energy of the system. The loss form of precious metals is similar to copper in the slag, mainly based on mechanical suspension which accounting for more than 90% of the total slag loss. The precious metal multiphase equilibrium model was modified with a mechanical suspension rate. The modified model was used to calculate the Au and Ag contents in the copper smelting process of the typical copper smelting process. The Au contents and Ag contents in matte are 13.29 g/t and 825.84 g/t, and Au and Ag contents in slag are 0.53 g/t, 33.29 g/t, respectively, which are in good agreement with the production results. Then, the distribution behavior of Au and Ag in multiphase were calculated under different concentrate components (Cu, S) and process parameters (matte grade, oxygen-ore ratio). With the increase of Cu content in concentrate, matte grade and oxygen-ore ratio, and the decrease of S content in the concentrate, the distribution ratio of Au and Ag in the copper matte decreases, and the loss in the slag increases. Therefore, reducing the mechanical levitation rate of the copper matte is beneficial to reduce the loss of precious metals in the slag and improve the recovery rate of precious metals.
Mechanism of gold collection in matte and distribution behavior of precious metals in oxygen-enriched smelting process 造锍捕金机理及富氧熔炼过程贵金属分配行为
贵金属在高温熔液中的分布行为受冶炼系统和构件的热力学性质的影响。高温熔融冰砂捕获贵金属有利于降低体系的总吉布斯自由能。贵金属在渣中的损失形式与铜相似,主要以机械悬浮为主,占总失渣量的90%以上。采用机械悬浮速率对贵金属多相平衡模型进行了修正。采用修正后的模型计算了典型铜冶炼过程中Au和Ag的含量。精矿中Au和Ag的含量分别为13.29 g/t和825.84 g/t,矿渣中Au和Ag的含量分别为0.53 g/t和33.29 g/t,与生产结果吻合较好。然后,计算了不同精矿组分(Cu、S)和工艺参数(磨砂品位、氧矿比)下Au、Ag在多相中的分布行为。随着精矿中Cu含量、磨砂品位和氧矿比的增加,精矿中S含量的降低,铜磨砂中Au、Ag的分布比例减小,矿渣中的损失增大。因此,降低铜锍的机械悬浮率,有利于减少矿渣中贵金属的损失,提高贵金属的回收率。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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CiteScore
1.70
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