中南大学学报（自然科学版）2018，Vol.49Issue(5)：1047-1053,7.DOI:10.11817/j.issn.1672-7207.2018.05.004
含钒钢渣在熔融NaOH体系中的焙烧过程
Roasting process of vanadium-bearing steel slag in molten NaOH system
摘要
Abstract
The process of vanadium bearing steel slag roasting in molten NaOH system was studied and the influences of factors, such as roasting temperature, mass ratio of NaOH to vanadium-bearing steel slag (alkali-to-ore) and roasting duration, on extraction rate of vanadium were investigated. The optimum reaction conditions were obtained. The reaction mechanism of roasting process was analyzed and the reaction kinetics model was established. The results show that the optimum conditions are as follows: roasting temperature is 450 ℃, mass ratio of alkali-to-ore is 5:1, roasting duration is 60 min. Extraction rate of vanadium stabilizes at 90% or more under the optimum conditions. The most influential factor on extraction rate of vanadium is mass ratio of alkaline-ore, which is then followed by roasting temperature and roasting duration. Roasting process of vanadium-bearing steel slag in molten NaOH system is controlled by solid product layer diffusion. Activation energy of this process is 39.4 kJ/mol. The kinetic equation for the course of roasting is 1-2α/3-(1-α)2/3 =1.239exp[-39.4/(RT)]t.关键词
含钒钢渣/熔融/动力学/焙烧Key words
vanadium-bearing steel slag/melting/kinetic/roasting分类
矿业与冶金引用本文复制引用
蔡永红,赵昌明,宁哲,王一雍,张崇民..含钒钢渣在熔融NaOH体系中的焙烧过程[J].中南大学学报（自然科学版）,2018,49(5):1047-1053,7.基金项目
国家自然科学基金资助项目(51674141,51174111) （51674141,51174111）
辽宁省教育厅项目(2016TSPY02) （2016TSPY02）
辽宁科技大学青年科学基金资助项目(2015QN01) （2015QN01）
辽宁省化学冶金工程重点实验室开放课题基金资助项目(USTLKFSY201502)(Projects(51674141,51174111)supported by the National Natural Science Foundation of China （USTLKFSY201502）
Project(2016TSPY02)supported by the Educational Commission of Liaoning Province （2016TSPY02）
Project(2015QN01)supported by the Youth Science Fund of University of Science and Technology Liaoning （2015QN01）
Project(USTLKFSY201502)supported by the Key Laboratory of Chemical Metallurgy Engineering of Liaoning Province) （USTLKFSY201502）
