| 碳热还原法制取碳化铬、金属铬的热力学分析 |
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| 引用本文： | 张雪峰,方民宪,同艳维,李会容. 碳热还原法制取碳化铬、金属铬的热力学分析[J]. 材料导报, 2010, 24(18) |
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| 作者姓名： | 张雪峰 方民宪 同艳维 李会容 |
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| 作者单位： | 攀枝花学院材料工程学院,攀枝花,617000;攀枝花学院电气信息工程学院,攀枝花,617000 |
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| 基金项目： | 四川省科技支撑计划项目 |
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| 摘 要： | 分析了以Cr2O3和C为原料用碳热还原法制取Cr3C2和金属铬的热力学原理.结果表明, Cr2O3的碳热还原反应机理有2种,即主要依靠CO/CO2传质的气-固反应以及碳与Cr2O3之间固相扩散传质的固-固反应.前者的反应温度低于后者,何种反应机理占主导地位取决于Cr2O3和C的初始混合态.无论制取Cr3C2还是金属铬,最好都在真空气氛下进行,制取Cr3C2的反应温度比制取金属铬的低,制取金属铬的真空度不宜太高.
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| 关 键 词： | 碳热还原 碳化铬 金属铬 热力学 |
Study on Thermodynamic Principle of Preparation of Cr3C2 and Cr by Carbon-heat Reducing |
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| ZHANG Xuefeng,FANG Minxian,TONG Yanwei,LI Huirong. Study on Thermodynamic Principle of Preparation of Cr3C2 and Cr by Carbon-heat Reducing[J]. Materials Review, 2010, 24(18) |
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| Authors: | ZHANG Xuefeng FANG Minxian TONG Yanwei LI Huirong |
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| Affiliation: | ZHANG Xuefeng1,FANG Minxian1,TONG Yanwei1,LI Huirong2 (1 College of Material Engineering,Panzhihua University,Panzhihua 617000,2 College of Information and Electrical Engineering,Panzhihua 617000) |
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| Abstract: | Thermodynamic principle of preparation of Cr3C2 and Cr by carbon-heat reducing is analyzed with Cr2O3 and C as raw materials.The results show that there are two principles for Cr2O3 reducing by carbothermal method,one reaction depends mainly on CO/CO2 gas-solid transmitted and another reaction depends mainly on the so-lid-solid reaction between carbon and chromium oxide.The temperature of former is lower than later.The reacting principle which is primary is depended on original mixed condition between Cr2O3... |
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| Keywords: | carbon-heat reducing chromium carbide chromium thermodynamics |
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