重庆大学学报2011，Vol.34Issue(3)：82-88,7.
转底炉处理冶金粉尘工艺的锌钾钠脱除及烟气形成
Study on mechanism of Zn, K, Na removal and flue gas formation in RHF direct reduction treat metallurgical dust process
摘要
Abstract
In metallurgical dusts treating by RHF (rotary hearth furnace) direct reduction, processes of Zn, K, Na removal and flue gas formation have significantly influence on RHF process. Direct reduction experiment on cold bonded briquettes, made by mixing metallurgical zinc-bearing dusts with proper proportions, are investigated in a high temperature tube furnace simulated RHF. Ingredients, microstructures and phase compositions of flue gas and secondary dust are collected and analyzed. The results show that removal rates of Zn, K, Na and Pb are 98％, 80％, 88％ and 85％ respectively, gas ingredient of flue gas of N2, CO, CO2 are 71.4％ ,14.5％ and 14.1 ％ respectively, and phase compositions of secondary dust are ZnO, KCl, Zn5(OH)8Cl2H2O, PbO and NaCl. Studies show that ZnO content of secondary dust is up to 80％, which can be reused as secondary zinc resource. Then mechanism of removal of Zn, Pb, K and Na and forming of flue gas are analyzed in direct reduction process.关键词
转底炉/粉尘/直接还原/脱锌Key words
rotary hearth furnace/ metallurgical dust/ direct reduction/ dezincification分类
矿业与冶金引用本文复制引用
王静松,杨慧贤,余雪峰,曾晖,丁银贵,薛庆国..转底炉处理冶金粉尘工艺的锌钾钠脱除及烟气形成[J].重庆大学学报,2011,34(3):82-88,7.基金项目
国家发改委循环经济示范工程(发改办高技[2007]3194号) （发改办高技[2007]3194号）
中央高校基本科研业务费专项资金资助(FRFMP-09-001A) （FRFMP-09-001A）
