福建某金精矿焙砂浸出金、银试验研究
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摘要
福建某金精矿焙砂主要组成矿物为赤铁矿与石英,金、银含量分别为31.27 g/t、824 g/t。采用自主合成的嗜金1号药剂从稀硫酸脱铜后的该金精矿焙砂中提取金、银。结果表明,在嗜金1号用量为5 g/L、pH为11、液固比为5 mL/g、浸出温度为25℃、浸出时间为24 h时,金与银的浸出率分别达到92.76%、85.02%。比以氰化钠为浸出剂时,金浸出率提高了3.73个百分点。嗜金1号的浸金效果较优,且嗜金1号较氰化钠对环境的影响较弱。因此,嗜金1号可以用于含金焙砂的金浸出工艺。
The main phase of the gold concentrate calcine in Fujian Province is hematite and quartz. The content of gold and silver is 31.27 g/t and 824 g/t,respectively. The copper was extracted by dilute sulfate leaching method. Then,the gold and silver were extracted by the self-made agent named Addicted-gold NO.1. The result showed that when the Addicted-gold NO.1 agent dosage of 5 g/L,p H value of 11,liquid-to-solid ratio of 5 mL/g,reaction temperature of 25 ℃,leaching time of 24 h,leaching rate of gold and silver were 92.76% and 85.02%,respectively. The leaching rate of gold was 3.73 percentage points higher than that by sodium cyanide method. Hence,the Addicted-gold NO.1 not only has excellent effect of the gold leaching rate,but also has weak impact on the environment. Therefore,the Addicted-gold NO.1 can be used in gold leaching process from gold concentrate calcine.
The main phase of the gold concentrate calcine in Fujian Province is hematite and quartz. The content of gold and silver is 31.27 g/t and 824 g/t,respectively. The copper was extracted by dilute sulfate leaching method. Then,the gold and silver were extracted by the self-made agent named Addicted-gold NO.1. The result showed that when the Addicted-gold NO.1 agent dosage of 5 g/L,p H value of 11,liquid-to-solid ratio of 5 mL/g,reaction temperature of 25 ℃,leaching time of 24 h,leaching rate of gold and silver were 92.76% and 85.02%,respectively. The leaching rate of gold was 3.73 percentage points higher than that by sodium cyanide method. Hence,the Addicted-gold NO.1 not only has excellent effect of the gold leaching rate,but also has weak impact on the environment. Therefore,the Addicted-gold NO.1 can be used in gold leaching process from gold concentrate calcine.
引文
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[3]何超然,丁冲,王晓辉,等.氰化尾渣碱法水热浸出脱石英试验[J].金属矿山,2018(3):192-195.He Chaoran,Ding Chong,Wang Xiaohui,et al.Research on desilicication of cyanide tailings via alkaline hydrothermal process[J].Metal Mine,2018(3):192-195.
[4]党晓娥,王璐,孟裕松,等.某环保药剂的浸金性能及贵液中金的活性炭吸附特性[J].黄金科学技术,2017(6):114-120.Dang Xiaoe,Wang Lu,Meng Yusong,et al.Performance of an environmental gold leaching agent and activated carbon adsorption characteristics of gold in the liquid[J].Gold Science and Technology,2017(6):114-120.
[5]刘宪超,蒋中刚,唐道文,等.难浸金矿石的次氯酸钠浸出试验研究[J].湿法冶金,2014,33(6):413-415.Liu Xianchao,Jiang Zhonggang,Tang Daowen,et al.Experimental study on leaching of gold from a refractory gold ore using sodium hypochlorite[J].Hydrometallurgy of China,2014,33(6):413-415.
[6]史娟华,于先进,张亚莉,等.氯化钠-次氯酸钠法从氰化渣中回收金[J].有色金属:冶炼部分,2013(3):35-37.Shi Juanhua,Yu Xianjin,Zhang Yali,et al.Sodium chloride-sodium hychlorite method for gold recovery from cyanide residue[J].Nonferrous Metals:Extractive Metallurgy,2013(3):35-37.
[7]刘家弟,刘凤春.难浸金精矿硫脲浸金试验研究[J].矿业研究与开发,2017(9):36-39.Liu Jiadi,Liu Fengchun.Experimental study on gold leaching from refractory gold concentrate by thiourea[J].Mining Research and Development,2017(9):36-39.
[8]马方通,高利坤,董方,等.硫脲浸金及置换法从硫脲溶液中回收金研究现状[J].湿法冶金,2017,36(4):257-261.Ma Fangtong,Gao Likun,Dong Fang,et al.Situations of leaching and replacement of gold in acidic thiourea solution[J].Hydrometallurgy,2017,36(4):257-261.
[9]吴浩,黄万抚,邱峰,等.硫氰酸盐浸金研究进展[J].贵金属,2016,37(3):72-78.Wu Hao,Huang Wanfu,Qiu Feng,et al.Review of gold leaching by thiocyanate[J].Precious Metals,2016,37(3):72-78.
[10]Ma C J,Li J Y,Liu R J.A review of thiocyanate hydrometallurgy for the recovery of gold[J].Applied Mechanics&Materials,2015,68(s):53-61.
[11]Mohammadi E,Pourabdoli M,Ghobeiti Hasab M,et al.Ammoniacal thiosulfate leaching of refractory oxide gold ore[J].International Journal of Mineral Processing,2017(4):6-10.
[12]刘有才,朱忠泗,符剑刚,等.某金矿石的石硫加碱催化合剂法浸金研究[J].稀有金属,2013,37(1):123-129.Liu Youcai,Zhu Zhongsi,Fu Jiangang,et al.Leaching and gold ores by lime-sulphur-synthetic-solution with alkali-catalyzed process[J].Chinese Journal of Rare Metals,2013,37(1):123-129.