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。
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 th...
出处
《有色金属》
CSCD
1991年第2期49-54,共6页
Nonferrous Metals
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
Magnesium oxide
Mechanism of carbonation
Rate-controlling step
Magnesium carbonate trihydrate
Magnesium carbonate pentahydrate
