| 难处理金矿浸出预处理过程的电位-pH图 |
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| 引用本文： | 金创石,张廷安,牟望重,曾勇.难处理金矿浸出预处理过程的电位-pH图[J].东北大学学报(自然科学版),2011,32(11):1599-1602. |
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| 作者姓名： | 金创石 张廷安 牟望重 曾勇 |
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| 作者单位： | 1. 东北大学多金属共生矿生态化利用教育部重点实验室,辽宁沈阳110819／金策工业综合大学物理化学教研室,朝鲜平壤999093
2. 东北大学多金属共生矿生态化利用教育部重点实验室,辽宁沈阳,110819 |
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| 基金项目： | 国家“十一五”科技支撑计划项目(2008BAB34B01); 国家自然科学基金资助项目(51004033,50974035,51074047) |
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| 摘 要： | 通过热力学计算绘制了298.15 K下FeS2-H2O系、FeAsS-H2O系的电位-pH图,为难处理金矿浸出预处理过程中黄铁矿与毒砂的氧化分解提供了热力学依据.由FeS2-H2O系的电位-pH图可知,黄铁矿可以被O2等氧化剂氧化分解.在水的稳定区范围内,元素硫的稳定区较小,浸出预处理过程中硫基本上以HSO-4,SO24-形式存在.由FeAsS-H2O系的电位-pH图可知,毒砂比黄铁矿更容易被氧化分解.浸出预处理过程应提高氧化电位使毒砂中的砷和硫氧化至最高价脱去,避免亚砷酸盐和元素硫的生成.以难处理金精矿为原料进行加压氧化验证实验,在反应温度180℃、精矿粒度为-0.075 mm~+0.061...
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| 关 键 词： | 难处理金矿 预处理 电位-pH图 黄铁矿 毒砂 |
E-pH Diagram of Pretreatment of Leaching for Refractory Gold Ore |
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| KIM Chang-sok,ZHANG Ting-an,MU Wang-zhong,ZENG Yong.E-pH Diagram of Pretreatment of Leaching for Refractory Gold Ore[J].Journal of Northeastern University(Natural Science),2011,32(11):1599-1602. |
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| Authors: | KIM Chang-sok ZHANG Ting-an MU Wang-zhong ZENG Yong |
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| Institution: | KIM Chang-sok1,2,ZHANG Ting-an1,MU Wang-zhong1,ZENG Yong1(1.Key Laboratory of Ecological Utilization of Multi-metal Intergrown Ores,Ministry of Education,Northeastern University,Shenyang 110819,China,2.Kimchak University of Technology,Department of Physical Chemistry,Pyongyang 999093,DPR of Korea.) |
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| Abstract: | E-pH diagrams of FeS2-H2O system and FeAsS-H2O system at 298.15 K were drawn to provide the thermodynamic basis for the pretreatment of pyrite and arsenopyrite before leaching.According to E-pH diagram of FeS2-H2O system,pyrite can be decomposed by O2 and other oxidants.The stable region of sulfur element is small and sulfur exists as HSO-4 and SO2-4 basically in the stable region of water.According to E-pH diagram of FeAsS-H2O system,the decomposition of arsenopyrite is easier than pyrite.Oxidation potenti... |
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| Keywords: | refractory gold ore pretreatment E-pH diagram pyrite arsenopyrite |
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