文章摘要
微细浸染型金矿酸性热压氧化预处理动力学研究
Study on the Kinetics of Pretreatment for Micro-disseminated Sulfide Gold Ores by Acidic Autoclave Oxidation
投稿时间:2016-10-31  
DOI:
中文关键词: 冶金原料与预处理  热压氧化  硫化物金矿  动力学
英文关键词: metallurgical raw materials and pretreatment  autoclave  gold-bearing sulfide  kinetics
基金项目:广西科技开发项目(桂科AB16380023)。
作者单位E-mail
冯吉福 中国有色桂林矿产地质研究院有限公司广西 桂林 541004 jeffrey773@163.com 
周卫宁 中国有色桂林矿产地质研究院有限公司广西 桂林 541004 116i@163.com 
李尽善 中国有色桂林矿产地质研究院有限公司广西 桂林 541004  
袁江涛 中国有色桂林矿产地质研究院有限公司广西 桂林 541004  
罗星 中国有色桂林矿产地质研究院有限公司广西 桂林 541004  
马荣锴 中国有色桂林矿产地质研究院有限公司广西 桂林 541004  
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中文摘要:
      以氧气消耗速率表征氧化速率,研究了微细浸染型硫化物金矿热压氧化预处理过程动力学的影响因素,考察了矿浆pH值、温度、矿样粒度、氧分压、气液界面面积和矿浆浓度对氧化速率的影响,以及氧化率和氧化速率的关系。结果表明,矿浆pH<2.5时,保持较高的氧化速率;氧化速率随温度升高、氧分压增加和矿浆浓度降低而增大;增加气液接触面积可提高氧化速率,当矿浆浓度为33%、氧分压1.6 MPa,在优化条件下,气液接触比表面积达到25 m2/m3,40 min可完成氧化预处理。
英文摘要:
      The reaction of oxidation pretreatment was characterized by the oxygen consumption rate. The influencing factors on dynamics of autoclave oxidation pretreatment were studied in the micro-disseminated sulfide gold ore. The impacts on the oxidation rate by the initial pH of slurry, temperature, particle size, oxygen pressure, gas-liquid interfacial area, slurry concentration were investigated. The relationship between the degree and reaction rate of oxidation was also explored. The results showed that a high reaction rate of oxidation would be maintained when the pH of the slurry was less than 2.5. The oxidation would accelerate, as the temperature and oxygen pressure was increased while the slurry concentration was reduced. The reaction rate of oxidation could also be improved by rising gas-liquid interfacial area. The oxidation pretreatment could be finished in 40 min under the optimized conditions, when the slurry concentration was 33%, oxygen pressure was 1.6 MPa, gas-liquid interfacial area was 25 m2/m3.
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