【摘要】：對鋁酸鉀溶液碳酸化分解過程進行研究,建立碳酸化分解過程的動力學(xué)模型。借鑒拜耳法晶種分解的動力學(xué)模型,對碳分動力學(xué)數(shù)據(jù)進行多元回歸,得到動力學(xué)方程。結(jié)果表明:碳酸化分解的表觀活化能為39.2708kJ/mol,說明鋁酸鉀溶液碳酸化分解需要突破的壁壘小;瞬時晶種量對碳酸化分解過程的影響較小;相比鋁酸鈉溶液碳酸化分解,苛堿濃度對鋁酸鉀溶液分解的影響更大。鋁酸鉀溶液在40~80℃碳化分解,所得氫氧化鋁為拜耳石型。
[Abstract]:The carbonation process of potassium aluminate solution was studied and the kinetic model of carbonation decomposition process was established. Based on the kinetic model of seed decomposition by Bayer method, the kinetic equation of carbon fraction was obtained by multi-element regression. The results show that the apparent activation energy of carbonation decomposition is 39.2708kJ / mol, which indicates that the barrier to carbonation decomposition of potassium aluminate solution is small, the effect of instantaneous seed quantity on carbonation decomposition process is less, and the carbonation decomposition of potassium aluminate solution is less than that of sodium aluminate solution. The concentration of caustic soda has a greater effect on the decomposition of potassium aluminate solution. The potassium aluminate solution was carbonized at 40 鈩，

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