摘要
研究了363-383 K范围内,使用稀硫酸(20％-60％)酸解含Ti高炉渣的酸解动力学.实验条件下的化学反应过程为化学反应控制,用生成固体产物层的未反应核缩减模型可描述为1-(1-x)1/3=kMBcnAt/(roρwB)=Kt.将实验结果与模型关联,求出的酸解反应级数n=1.222,表观活化能为87.01 kJ/mol,K=5.090×104×(10.59+1/r0)cA1.222e-10.465×103/T.通过实验验证,TiO2酸解率低于90％时与模型很好符合.
The kinetics of the leaching reaction for dilute sulphuric acid (20%-60%) and Ti-bearing slag at 363-383 K was investigated and the reaction may be descripted by the named unreacted-core shrinking model: 1-(1-X)(1/3) = kM(B)c(A)(n)t/(r(0)rhow(B)) = Kt. The apparent reaction order of the leaching reaction is 1.222, apparent activation energy is 87.01 kJ/mol, K may be described by K=5.090x10(4) x (10.59 + 1/r(0))c(A)(1.222) e(-10.465 x 103/T) A The experiment results agree well with the model before achieving 90% TiO2 leaching rate.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2003年第3期293-296,共4页
Acta Metallurgica Sinica
基金
国家自然科学基金重点资助项目50234040
关键词
含Ti高炉渣
稀硫酸
酸解
动力学
Ti-bearing slag
dilute sulphuric acid
leaching
kinetics
