I_2-KI-H_2O_2体系下金溶解速率的影响因素分析
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摘要
分别采用正交试验法和单因素试验法考察I_2-KI-H_2O_2体系下碘质量分数、n(I_2)/n(I~-)比值、双氧水用量、固液比对金溶解速率的影响程度,以及碘化钾质量分数、m(I_2)/m(I~-)比值、双氧水用量、溶液温度和溶液pH对金溶解时间的影响,然后对金溶解后的溶液进行稳定性测试。结果表明,各因素影响程度大小顺序依次为固液比、双氧水用量、n(I_2)/n(I~-)比值、碘质量分数。当碘化钾质量分数为0.2～0.25g/mL、m(I_2)/m(I~-)=1∶5～1∶4、双氧水用量0.7～0.9mL、温度室温、pH为原溶液状态时,金溶解速率最大,溶液的稳定性可以满足使用要求。
Effects of ratio of iodine mass fraction,n(I_2)/n(I~-),H_2O_2dosage,and ratio of solid to liquid in I_2-KI-H_2O_2system on dissolution rate of gold were investigated by orthogonal and single-factor experiments,respectively.Effects of mass fraction of potassium iodide,m(I_2)/m(I~-),H_2O_2dosage,and temperature and pH value of solution on dissolution time of gold were studied.Stability of solution was tested.The results show that influence sequence of factors is solid-liquid ratio>H_2O_2dosage>n(I_2)/n(I~-)>iodine mass fraction.Gold dissolution rate is the highest,and stability of solution is feasible under the conditions including mass fraction of potassium iodide of 0.2～0.25g/mL,m(I_2)/m(I~-)=1∶5～1∶4,H_2O_2dosage of 0.7～0.9 mL,room temperature,and pH value of the original solution.
Effects of ratio of iodine mass fraction,n(I_2)/n(I~-),H_2O_2dosage,and ratio of solid to liquid in I_2-KI-H_2O_2system on dissolution rate of gold were investigated by orthogonal and single-factor experiments,respectively.Effects of mass fraction of potassium iodide,m(I_2)/m(I~-),H_2O_2dosage,and temperature and pH value of solution on dissolution time of gold were studied.Stability of solution was tested.The results show that influence sequence of factors is solid-liquid ratio>H_2O_2dosage>n(I_2)/n(I~-)>iodine mass fraction.Gold dissolution rate is the highest,and stability of solution is feasible under the conditions including mass fraction of potassium iodide of 0.2～0.25g/mL,m(I_2)/m(I~-)=1∶5～1∶4,H_2O_2dosage of 0.7～0.9 mL,room temperature,and pH value of the original solution.
引文
[1]AHMET DENIZ BAS,EDWARD GHALI,YEONUK CHOI.A review on electrochemical dissolution and passivation of gold during cyanidation in presence of sulphides and oxides[J].Hydrometallurgy,2017,6(21):30-44.
[2]ZHANG S,LI Y G,WANG R,et al.Superfine copper powders recycled from concentrated metal scraps of waste printed circuit boards by slurry electrolysis[J].Journal of Cleaner Production,2017,152:1-6.
[3]KONYRATBEKOVA S S,BAIKONUROVA A,USSOLTSEVA G A,et al.Thermodynamic and kinetic of iodine-iodide leaching in gold hydrometallurgy[J].Transactions of Nonferrous Metals Society of China,2015,25(11):3774-3783.
[4]白安平,宋永胜,李文娟,等.增氧条件下的碱性硫脲浸金试验[J].中国有色金属学报,2017,27(11):2363-2369.
[5]LIU X L,XU B,YANG Y B,et al.Effect of galena on thiosulfate leaching of gold[J].Hydrometallurgy,2017,5(11):157-164.
[6]李绍英,赵留成,赵礼兵,等.碘化浸金原理及研究进展[J].贵金属,2016,37(2):77-81.
[7]邓明强,白静,龙飞,等.废旧手机电路板硫脲提金的预处理工艺对比[J].有色金属(冶炼部分),2016(1):34-37.
[8]DAVIS A,TRAN T.Gold dissolution in iodide electrolytes[J].Hydrometallurgy,1991,26(2):163-177.
[9]MARUN J N,MEISSL R J,LARA R F,et al.Gold bearing ore processing with iodine-iodide solutions[C]//Proceeding of the 20th international mineral processing congress,Aachen Germany:GMDB(Gesellschaft fur Bergball,Metallurgie),1997:381-391.
[10]李绍英,王海霞,孙春宝,等.碘化物对金精矿碘化浸出过程的影响[J].中国有色金属学报,2013,23(5):1434-1439.
[11]袁喜振,李绍英,孙春宝,等.浮选金精矿和难浸含铜金矿的碘化浸金[J].中国有色金属学报,2014,24(12):3123-3128.
[12]庞朝霞.碘化法浸取金的研究[D].上海:华东理工大学,2012.
[2]ZHANG S,LI Y G,WANG R,et al.Superfine copper powders recycled from concentrated metal scraps of waste printed circuit boards by slurry electrolysis[J].Journal of Cleaner Production,2017,152:1-6.
[3]KONYRATBEKOVA S S,BAIKONUROVA A,USSOLTSEVA G A,et al.Thermodynamic and kinetic of iodine-iodide leaching in gold hydrometallurgy[J].Transactions of Nonferrous Metals Society of China,2015,25(11):3774-3783.
[4]白安平,宋永胜,李文娟,等.增氧条件下的碱性硫脲浸金试验[J].中国有色金属学报,2017,27(11):2363-2369.
[5]LIU X L,XU B,YANG Y B,et al.Effect of galena on thiosulfate leaching of gold[J].Hydrometallurgy,2017,5(11):157-164.
[6]李绍英,赵留成,赵礼兵,等.碘化浸金原理及研究进展[J].贵金属,2016,37(2):77-81.
[7]邓明强,白静,龙飞,等.废旧手机电路板硫脲提金的预处理工艺对比[J].有色金属(冶炼部分),2016(1):34-37.
[8]DAVIS A,TRAN T.Gold dissolution in iodide electrolytes[J].Hydrometallurgy,1991,26(2):163-177.
[9]MARUN J N,MEISSL R J,LARA R F,et al.Gold bearing ore processing with iodine-iodide solutions[C]//Proceeding of the 20th international mineral processing congress,Aachen Germany:GMDB(Gesellschaft fur Bergball,Metallurgie),1997:381-391.
[10]李绍英,王海霞,孙春宝,等.碘化物对金精矿碘化浸出过程的影响[J].中国有色金属学报,2013,23(5):1434-1439.
[11]袁喜振,李绍英,孙春宝,等.浮选金精矿和难浸含铜金矿的碘化浸金[J].中国有色金属学报,2014,24(12):3123-3128.
[12]庞朝霞.碘化法浸取金的研究[D].上海:华东理工大学,2012.