高铝中钛高炉渣脱硫的动力学机制

Desulphurization Dynamics Mechanism of Blast Furnace Slag With Medium Titanium and High Alumina Content

以现场高炉渣化学成分为基准,利用纯化学试剂制备试验渣样,研究了高铝中钛型高炉渣脱硫的动力学过程,确定了其脱硫的动力学参数。结果表明,当反应温度一定时,铁水中硫含量w([S])随脱硫反应时间的延长而降低。试验条件下,高铝中钛渣脱硫过程属于二级反应,其限制性环节是硫在熔渣中的扩散。熔渣中硫的传质系数βS随着温度的升高而增大,硫在熔渣中的扩散活化能ED为127.03kJ/mol。

On the basis of the compositions of blast furnace（BF） slag at field,the desulphurization dynamics process was researched for BF slag with medium titanium and high alumina content,which was fabricated from pure chemical agents.The dynamics parameters of desulphurization were obtained.Results show that the sulfur content in liquid iron（w（[S]）） decreases with the elongation of desulphurization reaction time when the temperature is constant.Under the experimental conditions,the desulphurization process of BF slag with medium titanium and high alumina content belongs to second-order reaction,the restricted step of which is sulfur diffusion in the fused slag.The mass transfer coefficient（βS） rises with increasing the reaction,and the diffusion activation energy（ED） of sulfur element in fused slag is 127.03 kJ/mol.