王瑞祥,袁远亮,陈芳会,杨裕东,曾斌,郭跃东,田磊,徐志峰.复杂金精矿焙砂酸浸-氰化工艺的研究及金银物相演变规律[J].有色金属(冶炼部分),2019(2):34-38.
复杂金精矿焙砂酸浸-氰化工艺的研究及金银物相演变规律
Study on Acid Leaching Cyanide Process of Complex Gold Concentrates and Evolution of Gold and Silver Phases
投稿时间:2018-11-12  修订日期:2018-11-14
DOI:doi:10.3969/j.issn.1007-7545.2019.02.008
中文关键词:  复杂金精矿  酸浸  浸出条件  物相分析  
英文关键词:complex gold concentrate  acid leaching  leaching rate  phase analysis  silver
基金项目:国家自然科学基金资助项目(51564021);江西省青年科学基金资助项目(20151BAB206028)
                       
作者单位
王瑞祥 江西理工大学冶金与化学工程学院
袁远亮 信丰华锐钨钼新材料有限公司
陈芳会 江西理工大学冶金与化学工程学院
杨裕东 江西理工大学冶金与化学工程学院
曾斌 江西理工大学冶金与化学工程学院
郭跃东 江西理工大学冶金与化学工程学院
田磊 江西理工大学冶金与化学工程学院
徐志峰 江西理工大学冶金与化学工程学院
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中文摘要:
      研究了复杂金精矿焙砂酸浸—氰化工艺酸浸分铜工序铜浸出率,以及后续氰化过程金、银浸出率的影响。结果表明:在浸出温度363 K、浸出时间3 h、硫酸浓度1.0 mol/L、搅拌转速300 r/min、液固比4︰1的较优条件下,金、银、铜的浸出率分别为93.21%、83.25%、95.57%。硅酸盐包裹是造成银浸出率低的主要原因。添加剂直接焙烧,氰化渣中硅酸盐包裹银占渣含银总量的60.30%;在焙烧过程中添加氢氧化钠可以有效降低硅酸盐对银的包裹,有效提高银的浸出率,氰化渣中硅酸盐包裹银仅占渣含银总量的27.56%。
英文摘要:
      Copper leaching rate of acid leaching-cyanide process in complex gold concentrate calcine acid leaching-cyanide process and leaching rates of gold and silver in subsequent cyanidation process were studied. The results show that leaching rates of gold, silver and copper are 93.21%, 83.25%, and 95.57% separately under the optimum leaching conditions including leaching temperature of 363 K, leaching time of 3 h, sulfuric acid concentration of 1.0 mol/L, stirring speed of 300 r/min, and L/S=4/1. Silicate inclusion is the main cause of low silver leaching rate. Content of silver silicate inclusions is 60.30% of total amount of silver in cyanide residue without additives in roasting process. Sodium hydroxide addition in roasting process can effectively reduce probability of silver silicate inclusion and improve silver leaching rate. Content of silver silicate inclusion is only 27.56% of total amount of silver in cyanide residue in sodium hydroxide roasting process.
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