复杂钛渣硫酸分解动力学的计算机模拟研究

KINETICS OF DECOMPOSITION OF COMPLEX TITANIUM SLAG WITH SULFURIC ACID BY COMPUTER SIMULATION

本文研究了一种新品种钛渣硫酸分解的动力学。该种渣在相结构和化学组成上均与一般的高钛渣不同。对这种渣的硫酸分解动力学迄今尚未见研究。本文推导出本实验处于混合控制下的数学模型为:K′k_A[(1-α)^(1/3)-1-1/3ln(1-α)]+K′r_0D[1-(1-α)^(1/3))=k_ADτ在冶金动力学研究中,当过程为化学反应和扩散混合控制时,用传统的方法不能确定其动力学常数。本文探索用复合形最优化法运用电子计算机计算该条件下的动力学常数,并确定了所研究的过程为内扩散控制,同时用传统的方法得到了验证。本实验内扩散控制的数学模型为(本文的K′=0.5489):(1-α)^(1/3)-1-(1/3)ln(1-α)=(D/K′)τD=0.00693(cm^2/min)本研究的结果为该重要过程从理论上指明了强化途径,对实践过程有指导意义。本文探索使用的确定动力学常数的方法有较好的应用价值。

The kinetics of de composition of a new type of complex titanium slag by sulfuric acid was investigated.This new type of complex titanium slag was distinct from the usual high titanium slag in chemical composition and phase construction.The decom- position kinetics of this slag has not been reported in literatures.The mathematic- al model obtained in the case of mixed rate-control is K'k_A〔1—α)1/3—1—(1/3)h(1—α)〕+K′n_0D[1—(1—α)1/3]=k_AD_τ When mixed kinetics of metallurgical processes is encountered,the kine...