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金属矿山 ›› 2009, Vol. 39 ›› Issue (09): 113-116.

• 矿物工程 • 上一篇    下一篇

方铅矿氧化过程中温度和氧化物浓度的影响研究

贾清梅,曹兵,陈娟浓,太军君   

  1. 1.河北理工大学;2.唐山职业技术学院;3.河北省矿业开发与安全技术重点实验室;4.唐山师范学院
  • 出版日期:2009-09-15 发布日期:2011-04-26

Effect of Temperature and Oxide Concentration in Galena Oxidation Process

Jia Qingmei1,3,Cao Bing2,Chen Juannong1,3,Tai Junjun4   

  1. 1.Hebei Polytechnic University;2.Tangshan Vocational Technical College;3.Mineral Development and Security Technology of Key Laboratory Hebei Province;4.Tangshan Teacher's College
  • Online:2009-09-15 Published:2011-04-26

摘要: 通过采用硫酸铁作氧化剂,在pH=2、温度50 ℃和25 ℃时对不同浓度氧化介质中方铅矿进行氧化试验。通过试验计算出反应速率常数与反应级数、反应活化能并确定反应动力学方程。分析温度和氧化介质浓度对方铅矿氧化速率的影响,在50 ℃条件下,用Fe2(SO4)3作为氧化剂时,溶液的浓度为100 mg/L时反应进行很快。当溶液的浓度越高时,溶液中硫酸根离子的浓度就越高,越容易生成PbSO4沉淀,阻碍反应的进行。而在25 ℃时,反应非常缓慢甚至不进行。  

关键词: 方铅矿, 氧化动力学, 反应速率

Abstract: Taking Ferric Sulfate as the Oxidant,a series of oxidation experiments on galena in different oxidation medium concentration are conducted under different condition with pH 2,temperature 50 ℃ and 25 ℃ repectively.Then,the reation rate constant,reaction order,reaction activation and the function of the reaction kinetics can be determined by computation.And some effects of temperature and oxidized medium on galena oxidation speed are studied.Under the condition of 50 ℃,and Fe2(SO4)3 as oxidant,the oxidation reaction rate is very fast when solution concentration is 100m g/L.The higher the concentration is,the more sulfuric acid ion can be got,and the easier sediment of PbSO4 is produced,leading the reaction impeded.And the reaction will be extremely slow or even can't carry on at 25 ℃.

Key words: Galena, Oxidation Kinetics, Reaction Rate