无钟高炉料层内孔隙的分布

 高炉装料系统是调节炉料在炉内原始分布的唯一手段,料层的孔隙率分布会对煤气流分布产生重要影响。以某高炉1/10布料模型为研究对象,首先测量了炉料物性参数,然后采用离散元法对散料堆孔隙率分布、布料矩阵和料线高度对料层径向孔隙率分布的影响进行了研究。结果表明,实验室测量获得烧结矿、焦炭和球团矿物性参数和文献中引用的数据相差较大;料堆孔隙分布和颗粒形状有密切关系;布料矩阵通过影响颗粒数目来影响孔隙率分布,布料圈数增加,孔隙率下降,布料角度变化较大时才会影响料层孔隙率的径向分布曲线;随着料线高度增加,料层底部径向孔隙率的值会增大。没有数据显示料堆粒度偏析和孔隙分布有必然关系。

Porosity distribution of burden layer of bell-less blast furnace top

Blast furnace burden distribution is the only way to adjust the original distribution of burden in the furnace. The porosity distribution of the burden layer will have an important impact on the distribution of gas flow. The 1/10 charging model of a real blast furnace is taken as the research object,and the effect of particle shape on porosity distribution of sandpile and burden distribution matrix and stock line level on the radial porosity distribution were simulated by the discrete element method. And the physical parameters of sinter,coke,and pellet were also measured.The results show that the measured parameters are quite different from the data quoted in the literature.The porosity distribution of sandpile has a closed relationship with particle shape.The porosity distribution is affected by the number of particles in the matrix,and the porosity decreases with the increase of the number of distribution circles. The curve of the radial porosity distribution will be affected when the chute angle changes greatly. With the increase of the stock line,the porosity of the bottom of the burden layer increases. There is no obvious evidence of a certain relationship between the particle size segregation and porosity distribution.