Slag holdups in a fixed bed of carbonaceous particles were investigated using three-dimensional (3D) computational fluid dynamics (CFD) and discrete element method (DEM) simulations. In particular, the effect of improved wettability on the slag holdup, as a result of the formation of a SiC coating on the carbonaceous particle surface, was investigated. Wettability with four different contact angles (i.e., 10, 20, 60, and 118 deg) and coke particles with three various diameters (8 mm, 10 mm, and 12 mm) were considered. It was found out that the total slag holdup was increased with increasing contact angles. At each contact angle, the total holdup decreased with an increase in particle size. The static holdups of particles having contact angles of 60 and 180 deg could be sufficiently predicted using the empirical equation suggested by Jang et al. On the contrary, the static holdups of particles having contact angles of 10 and 20 deg could be sufficiently predicted with the empirical equation proposed by Kawabata et al. and Fukutake and Rajakumar or Chew et al., respectively. The dynamic holdup was in reasonable agreement with the empirical equation suggested by Otake and Okada.

使用三维 (3D) 计算流体动力学 (CFD) 和离散元方法 (DEM) 模拟研究了碳质颗粒固定床中的炉渣滞留量。特别地，研究了由于在碳质颗粒表面上形成 SiC 涂层而提高的润湿性对渣滞留率的影响。四种不同接触角的润湿性（即.、10、20、60 和 118 度）和三种不同直径（8 毫米、10 毫米和 12 毫米）的焦炭颗粒。发现总渣保持率随着接触角的增加而增加。在每个接触角，总滞留量随着粒径的增加而降低。使用 Jang等人建议的经验方程可以充分预测接触角为 60 度和 180 度的颗粒的静态滞留量。相反，接触角为 10 度和 20 度的颗粒的静态滞留量可以用 Kawabata等人提出的经验方程充分预测。和 Fukutake 和 Rajakumar 或 Chew等人。， 分别。动态滞留量与 Otake 和 Okada 建议的经验方程合理一致。