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

作　　者：蔡永红 赵昌明[1] 宁哲[1] 王一雍[1] 张崇民 CAI Yonghong1, 2, ZHAO Changming1, NING Zhe1, WANG Yiyong1, ZHANG Chongmin1(1. School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China; 2. Pangang Group Chengdu Iron ＆ Steel Co. Ltd., Panzhihua 617000, Chin)

机构地区：[1]辽宁科技大学材料与冶金学院,辽宁鞍山114051 [2]攀钢集团成都钢钒有限公司,四川攀枝花617000

出　　处：《中南大学学报（自然科学版）》2018年第5期1047-1053,共7页Journal of Central South University:Science and Technology

基　　金：国家自然科学基金资助项目(51674141;51174111);辽宁省教育厅项目(2016TSPY02);辽宁科技大学青年科学基金资助项目(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)~~

摘　　要：研究含钒钢渣在熔融NaOH体系中的焙烧过程,考察焙烧温度、碱矿比(NaOH与含钒钢渣的质量比)、焙烧时间对含钒钢渣中钒提取率的影响;获得最佳反应条件,并对反应机理进行解析,建立反应动力学模型。研究结果表明:含钒钢渣在熔融NaOH体系中的焙烧过程最佳反应条件为焙烧温度450℃,碱矿比5:1,焙烧时间60min,在此条件下,钒提取率稳定在90%以上。对钒提取率影响最大的为碱矿比,其次是焙烧温度和焙烧时间;含钒钢渣在熔融NaOH体系中焙烧过程受固体产物层扩散控制,表观活化能为39.4 k J/mol,动力学方程为2/31-2a/3-(1-a)(28)1.239exp[-39.4/(RT)]t。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 k J/mol. The kinetic equation for the course of roasting is 1-2a/3-（1-a）^2/3=1.239 exp[-39.4/（RT）]t.

关 键 词：含钒钢渣 熔融 动力学 焙烧 

分 类 号：TF09[冶金工程—冶金物理化学]