A new hydrometallurgical process for the refractory gold arsenosulfideconcentrates under normal temperature and pressure was presented. The experimental results of arefractory gold concentrate show that the total cons...A new hydrometallurgical process for the refractory gold arsenosulfideconcentrates under normal temperature and pressure was presented. The experimental results of arefractory gold concentrate show that the total consumption of NaOH in alkaline leaching is only 40%of those theoretically calculated under the conditions of full oxidization at the same oxidation ofarsenic to ar-senate and sulfur to sulfate. After alkaline leaching, cyanidation and adsorptionwere carried out for 24 h. The dissolution of gold by NaCN is increased to 95.3% from 12.8% beforepretreatment, and meanwhile 99.3% of the adsorption of gold by activated charcoal. The consumptionof NaCN for one ton ore is 10 kg, which is 1.2 times less than that before pretreatment. As it iscarried out under normal temperature and pressure, the investment of installations is alsodecreased.展开更多
基金This project is jointly supported by the Creative Foundation of the National Northeast Research and Developing Base of High-Performance and New Materials of China (No.CX9906-3)the Natural Science Foundation of Liaoning Province of China (No.200110101
文摘A new hydrometallurgical process for the refractory gold arsenosulfideconcentrates under normal temperature and pressure was presented. The experimental results of arefractory gold concentrate show that the total consumption of NaOH in alkaline leaching is only 40%of those theoretically calculated under the conditions of full oxidization at the same oxidation ofarsenic to ar-senate and sulfur to sulfate. After alkaline leaching, cyanidation and adsorptionwere carried out for 24 h. The dissolution of gold by NaCN is increased to 95.3% from 12.8% beforepretreatment, and meanwhile 99.3% of the adsorption of gold by activated charcoal. The consumptionof NaCN for one ton ore is 10 kg, which is 1.2 times less than that before pretreatment. As it iscarried out under normal temperature and pressure, the investment of installations is alsodecreased.
基金financially supported by the National Key R&D Program of China(2019YFA0210004,2017YFA0207301)the National Natural Science Foundation of China(22125503,21975242,U2032212,21890754)+8 种基金the Strategic Priority Research Program of Chinese Academy of Sciences(CAS,XDB36000000)the Youth Innovation Promotion Association of CAS(CX2340007003)the Major Program of Development Foundation of Hefei Center for Physical Science and Technology(2020HSC-CIP003)the Key Research Program of Frontier Sciences of CAS(QYZDYSSW-SLH011)the Fok Ying-Tong Education Foundation(161012)the Users with Excellence Program of Hefei Science Center(2020HSC-UE001)the University Synergy Innovation Program of Anhui Province(GXXT-2020-001)Anhui Provincial Natural Science Foundation(2108085QB69)the Fundamental Research Funds for the Central Universities(WK2060000006)。
