料层减荷烧结支撑板支撑结构优化

Supporting Structure Optimization of Stand in Load Reduction Sintering Process

通过在料层内安装支撑板,减轻下部料层荷重,改善料层尤其是燃烧带的透气性,达到提高生产率的目的.以利用系数、转鼓强度为考察对象,通过正交实验,研究了烧结混合料水分、支撑板高度、支撑面积对利用系数、烧结矿转鼓强度的影响,应用综合分析法确定了最佳支撑结构,即支撑板高度约为料层高度的1/2,支撑面积为所支撑烧结饼面积的1.0%~1.2%.最优方案与基准实验的对比表明,应用料层减荷烧结,烧结生产率最大提高28.05%,转鼓强度下降3.75%,料层收缩减小28mm,还原性提高0.46%.

Aiming at increasing the productivity, the stand was set in the sintering bed to reduce the load of lower bed and improve the permeability of sintering bed, especially combustion zone. Under the laboratorial conditions, through orthogonal experiments, the influences of moisture of sinter mixture, height of stand and supporting area on productivity and drum index were studied. The optimal supporting structure was obtained based on the results of synthetic analyses, the height of stand was half of the bed and supporting area accounted for about 1.0%~1.2% of supported sinter cake area. Compared with the normal trial, in the optimal scheme trial, the productivity was increased by 28.05%, drum index decreased by 3.75%, shrinkage of sintering bed reduced 28 mm, and reduction index improved by 0.46%.