(1.東北大學(xué)鋼鐵冶金系, 沈陽(yáng) 110006;
2.北京科技大學(xué)冶金系, 北京 100083)
摘 要: 在氮?dú)鈿夥蘸?100～1300℃溫度范圍內(nèi), 對(duì)含鋅鉛粉塵配碳球團(tuán)中的鉛揮發(fā)動(dòng)力學(xué)的研究表明。還原溫度對(duì)鉛揮發(fā)速率有顯著影響，而煤粉粒度及過(guò)量碳含量對(duì)鉛揮發(fā)速度則沒(méi)有影響。求得鉛揮發(fā)表觀活化能為88.74 kJ/mol，并確定鉛的揮發(fā)限制性環(huán)節(jié)為鉛的蒸發(fā)和鉛通過(guò)其表面氣相邊界層的擴(kuò)散。
關(guān)鍵字: 鋅鉛粉塵 配碳球團(tuán) 揮發(fā)動(dòng)力學(xué)
（1.P.O.BOX 3137, Northeastern University, Shenyang 110006
2.University of Science & Technology Beijing, Beijing 100083）
Abstract:The study on the evaporation kinetics of lead in carbon-containing pellets made of Zn-Pb-bearing dusts, in an nitrogen atmosphere and between 1100℃ and 1300 ℃, showed that the reduction temperature has significant effects on evaporation rate of lead and that the particle size of coal powder and the extra carbon content have not effects on the evaporation rates. The activation energy 88.74kJ/mol was calculated for lead evaporation. The rate of lead evaporation is controlled by the lead volatilization reaction and the diffusion of gaseous lead through gas boundary on surface of the liquid lead.
Key words: Zn-Pb-bearing dusts carbon-containing pellets evaporation kinetics
