Influence of particle size distributions on the density and density gradients in uniaxial compacts

Effect of Coal Particle Size on the Temperature and Pressure of Low Temperature Carbonization Square Furnace: A Combined Computational and Industrial Practice Study

“…When the as-red coal particle size was set at 40,35,30,25,20,15,10, and 5 mm, the temperature eld distribution of y-direction and x-direction center sections are shown in Figure 3 and 4, which is for the numerical simulation results of the SJ carbonization furnace. The temperature eld distribution in the furnace cavity was symmetric, chie y from Figure 3 and 4, because the structure of the SJ furnace was symmetric and materials basically entered various feeding inlets in a uniform manner.…”

“…When different particle sizes of coal entered the SJ furnace, the bulk temperature in the furnace cavity decreased with decreasing particle size, but the overall temperature distribution trends were similar. This was probably because the decrease in the as-red coal particle size increased the bulk density of coal seams in the furnace, narrowed the gas channels, intensi ed resistance, and lowered the heat transfer e ciency, and thus decreased the temperature [2,3,29,30] . D = 20 mm was taken as an example to analyze the ow eld distribution in the high temperature zones.…”

“…The porosity, inertial resistance, viscous resistance, and other parameters of the coal seams were deduced based on the particle size of as-red coal, and the SIMPLE algorithm, a pressure-velocity coupling algorithm, was adopted as its computation method [27] . The ratio of the as-red coal gas/air was kept constant in the light of actual production conditions, and the particle size of the as-red coal (represented by D) was changed and set as 40,35,30,25,20,15,10, and 5 mm to simulate the temperature and pressure elds in the furnace. In addition, a comparative analysis with the test results of ve groups of coal with different particle sizes provided by Shenmu Sanjiang Coal Chemical Industry Co., Ltd was conducted.…”

“…3.5 Effect of different particle sizes of coal on the pressure eld distribution of furnace's longitudinal center section Figure 10 shows the pressure eld distribution of y-direction center section for the numerical simulation results of the SJ carbonization furnace when the as-red coal particle size was set at 40,35,30,25,20,15,10, and 5 mm. As shown in Figure 10, the pressure in the furnace increased with decreasing particle size when different particle sizes coal entered the furnace, but the distribution trends were similar.…”

Estudo Experimental E Numérico Do Comportamento De Compósitos Refratários Em Diferentes Temperaturas

“…The mechanical behavior of the refractory concretes depends on various factors, such as changes in the CAC phases, the evolution of hydrates with temperature, and particle sizes [2,37]. The differences of some measured properties of the three refractory concretes can be correlated with different size and size distributions of the aggregates [38]. This greater difference is probably related to matrix/aggregate interaction, since the aggregates in the refractory A51 are larger than those in refractory A71 and A90.…”