Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

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中国有色金属学报

ZHONGGUO YOUSEJINSHU XUEBAO

第28卷    第6期    总第231期    2018年6月

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文章编号:1004-0609(2018)-06-1242-08
盐酸体系中辉锑矿的臭氧协同氧化浸出动力学
田庆华1, 2, 3,王 浩1,王恒利1,辛云涛1,郭学益1, 2, 3

(1. 中南大学 冶金与环境学院,长沙 410083; 2. 中南大学 有色金属资源循环利用湖南省重点实验室,长沙 410083; 3. 中南大学 有色金属资源循环利用湖南省工程研究中心,长沙 410083)

摘 要: 采用动力学研究的方法对盐酸体系中辉锑矿的臭氧协同氧化浸出过程进行了研究,分别探索了温度、盐酸浓度、气体流量和搅拌速度等因素对该过程中锑浸出率的影响;在此基础上,对该浸出过程进行动力学计算。结果表明:在温度75 ℃、盐酸浓度4.50 mol/L、气体流量2.0 L/min和搅拌速度500 r/min的条件下浸出50 min后,锑浸出率可以达到59.13 %。辉锑矿的臭氧协同氧化浸出符合收缩核模型,过程反应速率受混合过程控制,计算得到表观活化能为15.98 kJ/mol,并最终建立了该浸出过程的动力学总方程式。

 

关键字: 盐酸;辉锑矿;臭氧;浸出;动力学

Ozonation synergistic leaching kinetics of stibnite in system of hydrochloric acid
TIAN Qing-hua1, 2, 3, WANG Hao1, WANG Heng-li1, XIN Yun-tao1, GUO Xue-yi1, 2, 3

1. School of Metallurgy and Environment, Central South University, Changsha 410083, China; 2. Hunan Key Laboratory of Nonferrous Metal Resources Recycling, Central South University, Changsha 410083, China; 3. Hunan Engineering Research Center of Nonferrous Metal Resources Recycling, Central South University, Changsha 410083, China

Abstract:A kinetic study method was used to study the synergistic oxidation and leaching of lanthanide with ozone in the hydrochloric acid system. The factors affecting the leaching rate such as temperature, concentration of hydrochloric acid, gas flow rate and stirring speed were investigated. On this basis, the kinetics of the leaching process was calculated. The results show that the antimony extraction is 59.13% after leaching for 50min at the conditions of temperature 75 ℃, hydrochloric acid concentration 4.50 mol/L, gas flow rate 2.0 L/min, and stirring speed 500 r/min. The process is consistent with the shrinkage model, the process reaction rate is controlled by the mixing process, the apparent activation energy calculated is 15.98 kJ/mol, and the general equation of dynamics of the leaching process is finally established.

 

Key words: hydrochloric acid; stibnite; ozone; leaching; kinetics

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

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