煤泥水絮凝过程絮体颗粒的分形特征研究

Research on fractal characteristics of floc particles in slime water flocculation

为研究煤泥水絮凝过程絮体颗粒的分布特征,根据分形理论建立了絮体粒度分布的分形表达式。研究发现在双对数坐标下,絮体颗粒的累积分布函数与粒径之间呈直线关系,表明絮体的粒度分布具有分形特征;絮体的粒度分形维数可定量评价絮凝过程中絮体颗粒的分布特征;粒度分形维数D和平均粒径Dave之间是负相关的关系,且各粒级含量对其影响较大,粒级范围相同时,细粒级所占的比例越大,对应的粒度分形维数越大。

The floc size distribution fractal expression is established according to the fractal theory, to study the distribution characteristics of floc particles of the slime water flocculation process. The results show that in the double logarithmic coordinates,the cumulative distribution function of the particle size is linear with the particle size distribution,which indicates that the size distribution of the particles has fractal characterizations; the fractal dimension of the particle size can be used to evaluate the distribution characteristics quantitatively in the flocculation process; the fractal dimension D and the average particle size of Daveare negatively related,which is greatly influenced by the content of each particle fraction,indicating that for the same particle greater proportion of fine fraction corresponds to larger fractal dimension.