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目前生产上采用化学分析法計算炭分率。此法的优点是准确,誤差小。但速度較慢,同时操作較复杂。谷安海同志在《炭酸化分解率的新测定方法》一文中,介紹了用物理方法测定炭分率(見1964年第11期《有色金属》第49頁)。文章在介紹苏联用測定比重計算結晶氢氧化鋁含量时說:“……假定在分解前后物料的总重不变,取单位容积物料的体积为1……”。笔者认为,此新測定法大有值得商榷之处。人所共知,炭分过程有CO_2参加反应:2NaOH+CO_2=Na_2CO_3+H_2O。同时分解过程在80～90℃和强烈的攪拌下进行,有大量水分蒸发(蒸发率約10%)。因
At present the production of chemical analysis of carbon content calculated. The advantages of this method is accurate, small error. But slower, while the operation is more complicated. Comrade Gu Anhai introduced the physical method for the determination of carbon fraction in the article “A New Method for Determining the Decomposition Rate of Carbonation” (No. 11, 1964, Non-Ferrous Metal, p. 49). The article, referring to the calculation of the proportion of crystalline aluminum hydroxide in the Soviet Union, said: “... Assuming that the total weight of the material before and after decomposition remains unchanged, the volume of material per unit volume is 1 ...”. In my opinion, this new assay is quite debatable. It is well known that there is CO 2 participation reaction in carbon fraction: 2NaOH + CO_2 = Na_2CO_3 + H_2O. At the same time the decomposition process at 80 ~ 90 ℃ under intense stirring, a large amount of water evaporation (evaporation rate of about 10%). because