Mineralogical characteristics and recovery process optimization analysis of a refractory gold ore with gold particles mainly encapsulated in pyrite and Arsenopyrite

Li, Jiafeng; Yang, Hongying; Zhao, Ran; Tong, L.; Qiao, Chunming

doi:10.1016/j.chemer.2022.125941

Cited by 6 publications

(1 citation statement)

References 23 publications

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“…Gold is an important precious metal, a trace element, with excellent (stable) chemical and physical properties; it has a wide range of applications in electronic products, jewelry, equipment manufacturing, finance, and other fields, affecting the world's economic development, industrial production, and financial order [1][2][3][4][5]. According to these data, as of 2022, China's official gold reserves totaled 2964.37 tons, and with the continuous development of science, more and more gold still needs to be mined to meet the needs of production and life [6,7].…”

Section: Introductionmentioning

confidence: 99%

Using Kerosene as an Auxiliary Collector to Recover Gold from Refractory Gold Ore Based on Mineralogical Characteristics

Sun,

Yu,

Jin

et al. 2023

Separations

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Carbon–arsenic-bearing gold ore is a typical complex refractory gold resource. Traditionally, xanthate was often used as a flotation agent to separate gold minerals. But, in this paper, in order to reduce the cost of the agent, kerosene was used as an auxiliary collector, and the gold grade and recovery rate were increased by about 10 g/t and 5.5%, respectively. Through process mineralogy studies of the raw ore, it was found that the ore has an Au grade of 5.68 g/t, most of which is surrounded by sulfide ore, accounting for 79.46%. The main minerals are pyrite, arsenopyrite, and quartz, etc. Their content, shape, particle size distribution, and occurrence state were obtained via microscopic observation and statistical analysis. According to the results of process mineralogy, various flotation conditions were tested, including grinding fineness, kerosene dosage, collector dosage, foaming agent dosage, and the slurry pH value. The optimal chemical system and the process flow of “two roughing, three cleaning and two scavenging” were finally determined, and the concentrate product with a gold grade of 42.83 g/t and recovery of 91.02% was obtained, which verified the feasibility of the kerosene-assisted xanthate flotation of refractory gold.

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