转炉钢渣粉磨动力学的实验研究

Trial study on grinding dynamics coverter of steel slag

针对冷却方式不同的二种转炉钢渣(水淬和自然冷却),采用水泥试验球磨机进行微细粉制备,分析比较了两者的粉磨动力学特性,导出了各自的粉磨速度方程。研究结果表明:两种钢渣粉体的比表面积S(m2/kg)与粉磨时间t(min)均呈一阶指数衰减关系,水淬钢渣的易磨性低于慢冷钢渣。慢冷钢渣的粉磨速度方程为dS/dt=14.01exp(-t/34.80),水淬钢渣的粉磨速度方程为dS/dt=11.55exp(-t/39.83)。

The grinding dynamic featurea of two converter steel slags, naturally cooled and water-granulated, have been comparatively studied using cement ball mill as grinding device in this paper. By the method of curvilinear regression, the grinding rate eauqtions of the two slags were obtained. The results shows that the Blaine specific surface area（S,m2/kg）of the both gound steel slags increases with grinding time （t,min）by the first order exponential attenuation function, and the grindability of water-granulated converter steel slag is worse than that of naturally cooled converter steel slag. The grinding dynamics of naturally cooled converter steel slag and water-granulated ocnverter steel slag follows dS/dt=14.01exp（-t/34.80）and t dS/dt=1 1.55exp（-t/39.83）.