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对马钢高炉瓦斯泥颗粒进行了粒度分布和微观形貌的测定和表征,并结合数学模型研究了其微波改性前后的分形特性.结果表明,微波改性后瓦斯泥颗粒形貌出现粗糙度增大、孔隙结构变化明显、比表面积增大、形状更不规则化的特征.结合分形模型得到瓦斯泥中3种主要颗粒(含铁为主的烧结矿颗粒、焦炭颗粒和其他次要组分颗粒)的分形维数分别由改性前的1.27,1.14,1.57增加到1.51,1.32,1.61.微波处理后高炉瓦斯泥颗粒分形维数增大的内在机制为,微波加热过程中颗粒内各矿物因吸波能力不同而发生相解离,同时产生物质与结构的重组,进而增加结构缺陷、改变颗粒的分形特性.
The particle size distribution and microstructure of the gas mud particles in the Masteel blast furnace were measured and characterized, and the fractal characteristics of the gas mud particles before and after microwave modification were also studied by mathematical models.The results showed that the roughness of the gas mud particles appearance after microwave modification The pore structure changes obviously, the specific surface area increases and the shape is more irregular.Combined with the fractal model, three kinds of main particles in the gas mud (iron-bearing sinter particles, coke particles and other minor components The fractal dimension of the particles increased from 1.27, 1.14, 1.57 before modification to 1.51, 1.32 and 1.61 respectively.The internal mechanism of increasing the fractal dimension of blast furnace gas mud was that the content of each mineral Due to different absorbing ability to phase separation occurs, while the material and structure of the reorganization, thereby increasing the structural defects, changing the fractal characteristics of the particles.