论文部分内容阅读
岩粉按粒度划分要用筛分法加以评定。选用目数为D_1D_2………D_K的筛子,将岩粉分成若干等级,各级岩粉最大颗粒的对应尺寸为l_1=D_1, l_2z=D_2,……l_k=D_K。根据尽寸范围,岩粉颗粒的大小是一定的,因为筛子孔限定了颗粒的通过。但是,在研究颗粒在气流中的运动情况时,改用当量直径d是合理的,所谓当量直径是指其质量与自然颗粒质量相等的球形颗粒直径。确定为:
Rock powder by particle size to be used to assess the screening method. Select the mesh with D_1D_2 ......... D_K, divide the rock powder into several grades, and the corresponding sizes of the largest particles of rock powder at all levels are l_1 = D_1, l_2z = D_2, ... l_k = D_K. The size of the rock dust particles is fixed according to the size of the sieve because the sieve pores define the passage of the particles. However, when studying the movement of particles in the gas flow, it is reasonable to use the equivalent diameter d. The equivalent diameter means the diameter of the spherical particles whose mass is equal to that of the natural particles. OK as: