(1. 中南大學(xué) 冶金與環(huán)境學(xué)院，長沙 410083；
2. 江西理工大學(xué) 能源與機械工程學(xué)院，南昌 330013)
摘 要: 罐式爐排料過程中石油焦顆粒運動行為對煅后焦的質(zhì)量至關(guān)重要。基于離散元法，建立罐式爐內(nèi)石油焦排料過程的顆粒尺度運動行為的三維數(shù)學(xué)模型，并通過1/15比例的冷態(tài)模型實驗驗證離散元法模擬的可靠性，研究料罐內(nèi)固體石油焦顆粒的運動模式、顆粒間相互作用應(yīng)力及力鏈分布特性。結(jié)果表明：離散元法模擬能很好的再現(xiàn)實驗結(jié)果；石油焦顆粒在料罐內(nèi)的加熱帶區(qū)域基本符合活塞流的運動特征，在冷卻水套區(qū)域呈漏斗流的運動特征；料罐內(nèi)石油焦顆粒間的作用力分布不均勻，強力鏈主要分布在料罐的中下部區(qū)域以及冷卻水套區(qū)域。
關(guān)鍵字: 罐式爐；排料行為；力鏈；離散元；物理模型
（1. School of Metallurgy and Environment, Central South University, Changsha 410083, China;
2. School of Energy and Mechanical Engineering, Jiangxi University of Science and Technology, Nanchang 330013, China）
Abstract:The descending behavior of petroleum coke in vertical shaft calciner (VSC) plays an important role in the quality of calcined petroleum coke. A three-dimensional(3D) mathematical model for the discharging behavior of petroleum coke in the VSC was established. Using this model, the motion trajectory of petroleum coke particles, and the distribution of stress and the contact force chain between particles was investigated. Moreover, the reliability of discrete element method (DEM) simulation was verified by 1/15-scale cold physical model experiment. The DEM simulation results agree very well with the experimental results. The petroleum coke flow in the heating zone of pot basically accords with the plug flow, and it presents a funnel flow in the cooling jacket region. The force distribution among the petroleum coke particles is not uniform and the strong chain is mainly distributed in middle and bottom of pot, especially the wall of the cooling water jacket area.
Key words: vertical shaft calciner; discharging behavior; force chain; discrete element method; physical model
