中南大学学报（自然科学版）2016，Vol.47Issue(6)：1850-1859,10.DOI:10.11817/j.issn.1672-7207.2016.06.005
钢包钙处理工艺中钙汽化过程的数值模拟
Numerical simulation of calcium vaporization during Ca-treatment process in ladle
摘要
Abstract
According to the law of calcium vaporization change in calcium treatment and actual data feeding wire process, the vaporization of calcium model was established based on two different calcium vaporization stages, feed wire period and week stirring period. The changing rules of calcium recovery with different feedrates were simulated through CFX. The results show that there are apparently different vaporization velocities between feed wire period and week stirring period. Actual vaporization velocity is proportional to theoretical floatation velocity of calcium bubble. When the proportional coefficient k is 0.4 in the feeding wire process and the apparent rate constant Ke is 0.001 2 s−1 in weak stirring stage, this numerical simulation matches actual plant data very well. At 200 m/min of feeding wire rate, the distribution of the mass concentration of calcium is uneven at 180 s after the end of feed wire. However, the calcium distributes equally in melt after week stirring period. The average mass fraction of calcium is 1.86×10−5 and the recovery of calcium is 23.2%. At some extent, the deepness of feeding wire and the calcium recovery increase with the feeding rate, whereas the vaporization of calcium may increase.关键词
钙处理/钙汽化/钙收得率/数值模拟Key words
calcium treatment/calcium vaporization/recovery of calcium/numerical simulation分类
矿业与冶金引用本文复制引用
王顺玺,张炯明,宋炜,王博,白敦敏..钢包钙处理工艺中钙汽化过程的数值模拟[J].中南大学学报（自然科学版）,2016,47(6):1850-1859,10.基金项目
国家自然科学基金资助项目(51474023) （51474023）
国家高技术研究发展计划(863计划)项目(2012AA03A505)(Project(51474023) supported by the National Natural Science Foundation of China （863计划）
Project(2012AA03A505) supported by the National High-Tech Research &Development Program (863 Program) of China) （2012AA03A505）
