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在不同的等温与非等温条件下 ,对AlF3·3H2 O进行了热重法 (TG)实验 ,得出不同等温温度时三水氟化铝干基氟含量w(F) / %、湿基水含量w(H2 O) / %与等温时间或不同升温速率下等温加热温度的关系式。求出了不同加热过程中氟化铝产品特定品质指标 (w(F) / %≥ 61 .0 ,w(H2 O) / % <0 .50 )下的特征操作参数及其相互关系。结果表明 ,升温速率越大 ,越有利于AlF3·3H2 O的脱水 ,而对其水解脱氟具有相对的抑制作用 ;提高等温温度 ,有利于AlF3·3H2 O的脱水而不利于保氟。适当选择不同加热过程中的操作参数及其控制范围 ,能满足三水氟化铝的脱水和保氟要求
Thermogravimetric (TG) experiments of AlF3 · 3H2O were carried out under different conditions of isothermal and non-isothermal conditions, and the dry basis fluorine content w (F) /% of aluminum trihydrate was obtained under different isothermal temperatures. The relationship between the content w (H 2 O) /% and isothermal heating temperature at isothermal time or at different heating rates. The characteristic operating parameters and the correlations of the specific quality indices (w (F) /% ≥ 61 .0, w (H 2 O) /% <0.50) of aluminum fluoride products during different heating processes were obtained. The results show that the higher the heating rate, the more beneficial to AlF3 · 3H2 O dehydration, while the hydrolysis of defluorination has a relatively inhibitory effect; to increase the isothermal temperature, is conducive to dehydration of AlF3 · 3H2 O detrimental to fluoride. Appropriate selection of different heating process operating parameters and control range, to meet the dehydration and fluoride fluoride aluminum fluoride