某含锑难处理金精矿碱预处理—压力氧化—氰化提金试验
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摘要
对某含锑难处理金精矿采用碱预处理—压力氧化—氰化回收金进行研究。考察了预处理碱浓度、浸出时间和温度对锑脱除率的影响,并考察了矿浆浓度、氧分压、反应温度和反应时间对氧化渣硫氧化率的影响。结果表明,含锑金精矿在细度-0.045mm>80%、NaOH 50g/L、浸出时间3h、浸出温度90℃、液固比4∶1的条件下碱预处理脱锑,锑脱除率95%。碱预处理渣在矿浆浓度40%、氧分压0.7～0.8MPa、反应温度200℃,停留时间30min条件下,平均硫氧化率97.12%。加压氧化渣氰化,渣计金浸出率超过95%。
Gold recovery from antimony-bearing refractory gold concentrate by alkali pretreatment,pressure oxidation and cyanidation was studied.Effects of pretreatment alkali concentration,leaching time and temperature on antimony removal rate were discussed.Effects of slurry concentration,oxygen partial pressure,reaction temperature and reaction time on sulfur oxidation rate from pressure oxidation slag were investigated.The results show that removal rate of antimony is 95% under the optimum conditions including concentrate fineness of-0.045 mm>80%,NaOH concentration of 50 g/L,leaching time of 3 h,leaching temperature of 90 ℃,and L/S=4/1.Sulfur oxidation rate is 97.12% under the optimum conditions including slurry concentration of 40%,oxygen partial pressure of 0.7～0.8 MPa,temperature of 200 ℃,and reaction time of 30 min.Gold leaching rate is 95% above after pressure oxidation and cyanidation.
Gold recovery from antimony-bearing refractory gold concentrate by alkali pretreatment,pressure oxidation and cyanidation was studied.Effects of pretreatment alkali concentration,leaching time and temperature on antimony removal rate were discussed.Effects of slurry concentration,oxygen partial pressure,reaction temperature and reaction time on sulfur oxidation rate from pressure oxidation slag were investigated.The results show that removal rate of antimony is 95% under the optimum conditions including concentrate fineness of-0.045 mm>80%,NaOH concentration of 50 g/L,leaching time of 3 h,leaching temperature of 90 ℃,and L/S=4/1.Sulfur oxidation rate is 97.12% under the optimum conditions including slurry concentration of 40%,oxygen partial pressure of 0.7～0.8 MPa,temperature of 200 ℃,and reaction time of 30 min.Gold leaching rate is 95% above after pressure oxidation and cyanidation.
引文
[1]《黄金生产工艺指南》编辑部.黄金生产工艺指南[M].北京:地质出版社,2000:254-255.
[2]杨子轩,谢贤,童雄,等.含锑金矿回收方法研究现状[J].矿产综合利用,2015(3):20-23.
[3]张俊峰,崔其磊.含锑精矿湿法浸出生产粗锑的工艺研究[J].中国有色冶金,2018,47(2):76-78.
[4]邓文,伍荣霞,刘志成,等.焙烧预氧化-硫代硫酸盐浸出某难处理金精矿[J].矿冶工程,2017,37(3):114-117.
[5]金世斌,马金瑞,邢志军,等.锑对难处理金矿石(金精矿)焙烧-氰化浸金的影响[J].黄金,2009,30(2):38-42.
[6]朱昌洛,史光大,余平.高锑高砷复杂金精矿固硫固砷焙烧预处理初探[J].矿产综合利用,2001(2):45-47.
[7]邓琼,李骞,白云汉,等.含砷锑金精矿的生物预氧化-氰化浸金研究[J].矿冶工程,2011,31(5):84-87.
[8]江国红,张艳敏.从含砷锑难处理金矿石中浸出金的试验研究[J].湿法冶金,2011,30(1):30-32.
[9]熊玉宝,王婷,陶林冲,等.某含砷锑碳金精矿氰化试验研究[J].黄金,2007,28(6):39-42.
[2]杨子轩,谢贤,童雄,等.含锑金矿回收方法研究现状[J].矿产综合利用,2015(3):20-23.
[3]张俊峰,崔其磊.含锑精矿湿法浸出生产粗锑的工艺研究[J].中国有色冶金,2018,47(2):76-78.
[4]邓文,伍荣霞,刘志成,等.焙烧预氧化-硫代硫酸盐浸出某难处理金精矿[J].矿冶工程,2017,37(3):114-117.
[5]金世斌,马金瑞,邢志军,等.锑对难处理金矿石(金精矿)焙烧-氰化浸金的影响[J].黄金,2009,30(2):38-42.
[6]朱昌洛,史光大,余平.高锑高砷复杂金精矿固硫固砷焙烧预处理初探[J].矿产综合利用,2001(2):45-47.
[7]邓琼,李骞,白云汉,等.含砷锑金精矿的生物预氧化-氰化浸金研究[J].矿冶工程,2011,31(5):84-87.
[8]江国红,张艳敏.从含砷锑难处理金矿石中浸出金的试验研究[J].湿法冶金,2011,30(1):30-32.
[9]熊玉宝,王婷,陶林冲,等.某含砷锑碳金精矿氰化试验研究[J].黄金,2007,28(6):39-42.