| CaF_2催化真空碳热还原异极矿制备金属锌(英文) |
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| 引用本文： | 熊利芝,陈启元,尹周澜,张平民,丁治英,刘志雄.CaF_2催化真空碳热还原异极矿制备金属锌(英文)[J].中国有色金属学会会刊,2012,22(3):694-699. |
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| 作者姓名： | 熊利芝 陈启元 尹周澜 张平民 丁治英 刘志雄 |
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| 作者单位： | 中南大学化学化工学院;吉首大学生物资源与环境科学学院 |
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| 基金项目： | Project(2007CB613601) supported by the National Basic Research Program of China;Project(51142001) supported the National Natural Science Foundation of China;Project(11B099) supported the Scientific Research Fund of the Human Provincial Education Department, China;Project(2011TT2038) supported the Scientific Research Fund of the Human Provincial Scientific and Technological Department, China |
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| 摘 要： | 通过异极矿真空碳热还原试验,研究添加CaF2和对碳热还原硅酸锌的的影响。结果表明:CaF2能催化硅酸锌的碳热还原,降低还原温度,缩短反应时间;温度越低,催化效果越好;CaF2的添加量越多,催化效果越明显。CaF2催化真空碳热还原异极矿的较佳工艺条件是:CaF2的添加量约10%,还原蒸馏温度1373K,C/Zn总的物质的量比2.5,系统压强低于20kPa,反应时间约40min。在较佳工艺条件下,异极矿中约93%的锌被还原蒸馏出来。
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| 关 键 词： | 金属锌 CaF2 催化作用 真空碳热还原 异极矿 |
| 收稿时间： | 12 January 2011 |
Preparation of metal zinc from hemimorphite by vacuum carbothermic reduction with CaF2 as catalyst |
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| XIONG Li-zhi,CHEN Qi-yuan,YIN Zhou-lan,ZHANG Ping-min,DING Zhi-ying,LIU Zhi-xiong.Preparation of metal zinc from hemimorphite by vacuum carbothermic reduction with CaF2 as catalyst[J].Transactions of Nonferrous Metals Society of China,2012,22(3):694-699. |
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| Authors: | XIONG Li-zhi CHEN Qi-yuan YIN Zhou-lan ZHANG Ping-min DING Zhi-ying LIU Zhi-xiong |
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| Affiliation: | 1,2 1.School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China;2.College of Biology and Environment Sciences,Jishou University,Jishou 416000,China |
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| Abstract: | Zn reduction was investigated by the vacuum carbothermic reduction of hemimorphite with or without CaF2 as catalyst.Results indicate that CaF2 can catalyze the carbothermic reduction of zinc silicate,decrease the reaction temperature and time.The lower the reaction temperature and the more the amount of CaF2,the better the catalytic effect.The optimal process condition is obtained as follows:the addition of about 10% CaF2,the reaction temperature of 1373 K,the molar ratio of C to ZnTotal of 2.5,the pressure of system lower than 20 kPa,the reaction time of about 40 min.Under the optimal process condition,the zinc reduction rate is about 93% from hemimorphite. |
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| Keywords: | metal zinc calcium fluoride catalysis carbothermic reduction hemimorphite |
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