| 硫铁矿烧渣酸浸反应动力学研究 |
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| 引用本文： | 占寿祥,郑雅杰.硫铁矿烧渣酸浸反应动力学研究[J].化学工程,2006,34(11):36-39. |
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| 作者姓名： | 占寿祥 郑雅杰 |
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| 作者单位： | 1. 中南大学,冶金科学与工程学院,湖南,长沙,410083;云浮硫铁矿企业集团公司,科技处,广东,云浮,527343
2. 中南大学,冶金科学与工程学院,湖南,长沙,410083 |
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| 摘 要： | 研究了硫铁矿烧渣与硫酸反应动力学。研究结果表明Fe3O4反应活性远远高于Fe2O3,铁浸出率由烧渣中Fe2O3与硫酸的反应速度决定。Fe2O3与硫酸反应动力学为颗粒缩小缩芯扩散控制,烧渣中Fe2O3与硫酸反应的活化能为6.936 kJ/mol。当硫酸质量分数为43%、硫酸用量为理论用量、反应温度为80℃、反应时间2 h时,当搅拌速度从0增加到400 r/m in时,铁的浸出率从19.5%增加到45%。
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| 关 键 词： | 硫铁矿烧渣 硫酸 浸取 动力学 |
| 文章编号： | 1005-9954（2006）11-0036-04 |
Study on leaching kinetics of pyrite cinder |
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| ZHAN Shou-xiang,ZHENG Ya-jie.Study on leaching kinetics of pyrite cinder[J].Chemical Engineering,2006,34(11):36-39. |
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| Authors: | ZHAN Shou-xiang ZHENG Ya-jie |
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| Affiliation: | 1. Metallurgical Physical Chemistry Institute, Central South University, Changsha 410083, Hunan Province, China;2. Science and Technology Department,Yunfu Pyrite Enterprise Group Corporation, Yunfu 527343, Guangdong Province, China |
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| Abstract: | The leaching kinetics of pyrite cinder and sulfuric acid reaction was studied.The study results show that Fe_3O_4 is more reactive than Fe_2O_3 when cinders react with H_2SO_4;the leaching rate of iron is decided by the(reaction) rate of Fe_2O_3 and H_2SO_4;the reaction between Fe_2O_3 and H_2SO_4 is controlled by diffusion,and the(reaction) is applicable to the shrinking core model.The activation energy of the reaction is 6.936 kJ/mol.The(leaching) rate of iron is increased from 19.5% to 45% when the agitation rate is increased from 0 to 400 r/min,the mass fraction of sulfuric acid is 43%,the dosage of sulfuric acid is the theoretic dosage,the reaction(temperature) is 80 ℃,and the reaction time is 2 h. |
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| Keywords: | pyrite cinder sulfuric acid leaching kinetics |
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