方铅矿氧化过程中温度和氧化物浓度的影响研究  

Effect of Temperature and Oxide Concentration in Galena Oxidation Process

作　　者：贾清梅[1,2] 曹兵[3] 陈娟浓[1,2] 太军君[4] 

机构地区：[1]河北理工大学 [2]河北省矿业开发与安全技术重点实验室 [3]唐山职业技术学院 [4]唐山师范学院

出　　处：《金属矿山》2009年第9期113-116,共4页Metal Mine

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。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 cant carry on at 25 ℃.

关 键 词：方铅矿 氧化动力学 反应速率 

分 类 号：TQ425.23[化学工程] TQ174.758