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对硫酸铵焙烧钛渣提取TiO2的焙烧过程进行了动力学研究,考察了焙烧温度、钛渣粒度和硫酸铵与钛渣质量比对TiO_2提取率的影响。结果表明:硫酸铵焙烧钛渣过程受化学反应控制,焙烧反应的表观活化能为66.59kJ/mol,动力学方程为1-(1-x)~(1/3)=0.246 2×10~3exp[-66 587/(RT)]×t。
The calcination process of titanium dioxide calcined by ammonium sulfate was studied. The calcination temperature, the particle size of titanium slag and the mass ratio of ammonium sulfate to titanium slag on the extraction rate of TiO 2 were investigated. The results show that the process of calcining titanium slag by ammonium sulfate is controlled by chemical reaction. The apparent activation energy of calcination reaction is 66.59kJ / mol and the kinetic equation is 1- (1-x) ~ (1/3) = 0.246 2 × 10 ~ 3exp [-66 587 / (RT)] × t.