【摘要】 利用静态图像法和筛分法,分析了镍铁渣的级配特征。结合Udden-Wentworth粒度划分方法和Folk-Ward图解法,计算了镍铁渣粒径中值、平均粒径、标准偏差、偏度和峰度。计算结果表明:与筛分法相比,静态图像法所测得的粗颗粒含量大于筛分法所测的,并且细颗粒含量会偏小,计算得到中值和平均粒径偏粗,分选偏好,偏度偏正,峰度偏尖锐。基于Φ建立的镍铁渣的粒度频率累计曲线能更好反映镍铁渣的粒径分布特征,利用大型直剪仪进行了镍铁渣的重复直剪试验,并对比了剪切前、后的颗粒级配,以期为镍铁渣等一些工业废渣的再利用提供借鉴。更多还原

【Abstract】 The gradation characteristic of ferronickel slag was analyzed by static image method and sieving method. The median, average particle size, standard deviation, skewness and peak of particle size of ferronickel slag were calculated by the Udden-Wentworth particle size division method and the Folk-Ward graphic method. Comparing with the sieving method, the content of coarse particles measured by static image method is larger than that measured by sieving method, and the content of fine particles will be small. The median and average particle sizes are coarse, sorting preference, skewness and peak value are sharp. The accumulative curve of size frequency of nickel-iron slag based on Φ value can satisfactorily reflect the characteristic of the particle size distribution. The repeated direct shearing test of nickel-iron slag was carried out with a large direct shearing instrument, and the particle gradation before and after shearing was compared, the result is expected to provide reference for the reuse of some industrial slag such as nickel-iron slag.更多还原