| 氧化镁浆液碳化机理的研究 |
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| 引用本文： | 周相廷,刘百年,刘志贤,汤集刚. 氧化镁浆液碳化机理的研究[J]. 有色金属, 1991, 0(2) |
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| 作者姓名： | 周相廷 刘百年 刘志贤 汤集刚 |
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| 作者单位： | 河北师范大学 北京矿冶研究总院 |
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| 摘 要： | 碳化是自白云岩或菱镁矿生产氧化镁和碱式碳酸镁等产品的基本工序。对碳化机理的研究有助于揭示碳化过程的本质和确定碳化的最佳条件,在理论和实践上均有意义。本文据系统的试验资料指出碳化的速控步骤不是化学反应,而是碳化过程中形成的 Mg(HCO_3)_2离开 MgO 固体表面向溶液的扩散。可作为判据的反应活化能计算结果(0.997kJ/mol)亦为此提供了证明。
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| 关 键 词： | 氧化镁 碳化机理 速控步骤 三水合碳酸镁 五水合碳酸镁 |
CARBONATION MECHANISM OF MgO CARBONATED SLURRY |
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| Zhou Xiangting Liu Bainian Liu Zhixian. CARBONATION MECHANISM OF MgO CARBONATED SLURRY[J]. Nonferrous Metals, 1991, 0(2) |
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| Authors: | Zhou Xiangting Liu Bainian Liu Zhixian |
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| Abstract: | Carbonation has been considered as a primary procedure for producingmagnesium oxide and basic magnesium carbonates etc.from dolomite andmagnesite.Investigation on carbonation mechanism will be a help to rev-eal the nature of the carbonation process and to select the optimum con-ditions,for this reason,it is of significance in both theory and prac-tice.On the basis of the data of systematic experiments,it has beenproved that the controlling step of carbonation reaction is diffusion ofMg(HCO_3)_2 formed in this process from MgO surface to solution,otherthan the chemical reaction.The calculation result of the active energyof reaction(0.997 kJ/mol),which can be regarded as a criterion,alsogives proof of this mechanism. |
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| Keywords: | Magnesium oxide Mechanism of carbonation Rate-controlling step Magnesium carbonate trihydrate Magnesium carbonate pentahydrate |
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