焙烧预处理过程中硫的转化对浸金的影响
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摘要
以贵州某卡林型金矿为研究对象,采用XRD、化学分析等方法,探索了焙烧预处理过程中焙烧温度、焙烧时间对硫转化率与金浸出率之间相互影响规律。结果表明,在700℃温度下,焙烧1.5~2 h,可以充分打开金的硫化物包裹,浸出率近90%;硫转化率由83.01%升高至91.02%,金浸出率与硫转化率基本呈线性正相关关系,相关系数r=0.93517。
Influence of roasting temperature and roasting time on the rate of desulfurization and gold leaching from a certain Carlin-type gold deposit located in Guizhou was investigated by using XRD and chemical analysis, and the relationship between the desulfurization and gold leaching was also explored. The results shows the roasting at 700 ℃ for 1.5~2 hours destroyed gold-bearing sulfides sufficiently, making the rate of gold leaching in the followed step reach nearly 90% and the rate of desulfurization rise to 91.02% from 83.01%. The rate of gold leaching exhibited positive correlation to that of desulfurization with a correlation coefficient r of 0.93517.
Influence of roasting temperature and roasting time on the rate of desulfurization and gold leaching from a certain Carlin-type gold deposit located in Guizhou was investigated by using XRD and chemical analysis, and the relationship between the desulfurization and gold leaching was also explored. The results shows the roasting at 700 ℃ for 1.5~2 hours destroyed gold-bearing sulfides sufficiently, making the rate of gold leaching in the followed step reach nearly 90% and the rate of desulfurization rise to 91.02% from 83.01%. The rate of gold leaching exhibited positive correlation to that of desulfurization with a correlation coefficient r of 0.93517.
引文
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[4]陈莉,宋晓红.浅谈活性炭吸附-碘量法测金的改进[J].甘肃冶金,2015(5):94-97.CHEN L,SONG X H.Improvement of activated carbon adsorption-iodimertric determination of gold[J].Gansu metallurgy,2015(5):94-97.
[5]苏秀珠,许涛,廖占丕,等.矿石中硫赋存状态分析方法[J].武汉工程大学学报,2012,34(12):16-19.SU X Z,XU T,LIAO Z P,et al.New method of sulfur chemical phase-analysis[J].Journal of Wuhan Institute of Technology,2012,34(12):16-19.
[6]王帅,李超,李宏煦.难浸金矿预处理技术及其研究进展[J].黄金科学技术,2014,22(4):129-133.WANG S,LI C,LI H X.Research progress of pretreatment technologies of refractory gold ores[J].Gold science and technology,2014,22(4):129-133.
[7]唐道文,杨聪,王锐.贵州某难浸金矿的热解实验研究[J].贵金属,2013,34(1):51-54.TANG D W,YANG C,WANG R.The study of pyrolysis experiment about some refractory gold mine in Guizhou province[J].Precious metals,2013,34(1):51-54.
[8]赵留成,寇珏,孙春宝,等.载金硫化物焙烧-自浸出过程研究[J].工程科学学报,2015(8):1000-1007.ZHAO L C,KOU J,SUN C B,et al.Roasting and self-leaching process research of gold-bearing sulfides[J].Chinese journal of engineering,2015(8):1000-1007.
[9]胡小莲,陈小汨,谢巧玲.高硫铝土矿氧化焙烧脱硫研究[J].中南大学学报(自然科学版),2010,41(3):852.HU X L,CHEN X M,XIE Q L.Desulfuration of high sulfur bauxite by oxidation roasting[J].Journal of Central South University(science and technology),2010,41(3):852.
[10]钱方珺.臭氧和三氯化铁氧化高硫高砷难浸金精矿的预处理试验研究[D].上海:东华大学,2009.QIAN F J.Experimental study in pretreatment of high-sulfur and high-arsenic refractory gold concentrate by ozone and ferric chloride[D].Shanghai:Donghua University,2009.
[11]李峰,丁德馨,胡南,等.难处理含金硫精矿的焙烧氧化-硫代硫酸盐浸出[J].中国有色金属学报,2014,24(3):831-837.LI F,DING D X,HU N,et al.Roasting oxidationthiosulfate leaching of gold from refractory gold-bearing sulfur concentrates[J].The Chinese journal of nonferrous metals,2014,24(3):831-837.