Welcome to visit The Chinese Journal of Process Engineering, Today is

›› 2011, Vol. 11 ›› Issue (4): 573-578.

• 反应与分离 • Previous Articles     Next Articles

Acid Leaching of Calcined Vanadium Titanomagnetite with Calcium Compounds for Extraction of Vanadium

LI Lan-jie ZHANG Li ZHENG Shi-li LOU Tai-ping WANG Shao-na CHEN Dong-hui CHEN Dong-hui ZHANG Yan   

  1. Research Center of Vanadium and Titanium Engineering Technology, Chengde Iron and Steel Group Co. LTD Materials and Metallurgy College ,Northeastern University Institute of Process Engineering, Chinese Academy of Sciences School of Materials and Metallurgy, Northeastern University Institute of Process Engineering, Chinese Academy of Sciences Vanadium and Titanium Engineering Technology Research Center, Chengde Iron and Steel Group Co.Ltd., HeBei Iron and Steel Group Co.Ltd. School of Metallurgy, Beijing Science and Technology University
  • Received:2011-03-30 Revised:2011-05-25 Online:2011-08-20 Published:2011-08-20
  • Contact: ZHANG Li

钒钛磁铁矿钙化焙烧及其酸浸提钒

李兰杰 张力 郑诗礼 娄太平 张懿 陈东辉 陈东辉 张燕   

  1. 承德钢铁集团钒钛工程技术研究中心 东北大学材料与冶金学院 中国科学院过程工程研究所 东北大学材料与冶金学院 中国科学院过程工程研究所 河北钢铁股份有限公司承德分公司钒钛工程技术研究中心 北京科技大学材料科学与工程学院
  • 通讯作者: 张力

PDF

Abstract: After comparing the results of vanadium extraction by roasting the mixture of calcium-bearing regents with vanadium titanomagnetite concentrate and leaching by deionized water and roasting the mixture of sodium-bearing regents with iron concentrate and leaching by acid, the extraction method of vanadium by roasting the mixture of calcium-bearing reagents with iron concentrate and leaching by sulfuric acid is proposed. Among roasting additives of Na2CO3, CaO, Ca(OH)2 and CaCO3, CaCO3 has the best effect for vanadium extraction. The optimal roasting conditions obtained are the additive dosage 10%, roasting temperature 1200℃ and roasting time 1 h with CaCO3, and the primary vanadium-bearing phase generated is calcium metavanadate. It can be dissolved in sulfuric acid solution at pH<1.35 and 2.5~4, and in hydrochloric acid solution at pH<1 and 4~6.7. The sulfuric acid leaching results show that calcium metavanadate in iron concentrate roasted can be leached when pH at 0.5, mass ratio of liquid to solid at 5:1, 80℃ and 3 h. The leaching rate of vanadium is 72.1% from the roasted concentrate.

Key words: vanadium titanomagnetite, calcination with calcium compound, acid leaching, extraction of vanadium

摘要： 对钒钛磁铁矿精矿钠化焙烧水浸提钒和钙化焙烧酸浸提钒的效果进行对比，确定钙化焙烧-硫酸浸出提钒方法，研究了焙烧添加剂Na2CO3, CaO, Ca(OH)2和CaCO3对浸出提钒效果的影响，其中CaCO3的作用最好，确定了CaCO3添加量为10%, 1200℃焙烧时间为1 h的优化焙烧条件，得到主要的含钒物相为偏钒酸钙相；偏钒酸钙在pH<1.35和2.5~4的硫酸溶液及pH<1和4~6.7的盐酸中可溶解，但酸浸所得铁精矿熟料中偏钒酸钙在pH 0.5、液固质量比5:1的硫酸溶液中80℃浸出3 h可更好溶出，钒浸出率可达72.1%.

关键词: 钒钛磁铁矿, 钙化焙烧, 酸浸, 提钒

CLC Number: