中南大学学报（自然科学版）2017，Vol.48Issue(10)：2565-2571,7.DOI:10.11817/j.issn.1672-7207.2017.10.002
铜渣转底炉直接还原磁选与熔分工艺比较
Comparisons between magnetic separation and gas smelting separation process to treat copper slag by rotary hearth furnace direct reduction
摘要
Abstract
Taking a domestic copper slag as the subject, comparison between the rotary hearth furnace direct reduction process followed by a magnetic separation process and the same rotary hearth furnace direct reduction process followed by a gas smelting process, were investigated. Firstly, the optimum reaction parameters were determined by basic tests, based on which the pilot plant scale tests were conducted to reveal the direct reduction mechanism of the copper slag in the rotary hearth furnace direct reduction process. Finally, computation and comparison analysis of energy consumption of both processes were carried out. The results show that after direct reduction in the rotary hearth furnace, fayalite (Fe2SiO4) and magnetite (Fe3O4) in the copper slag are phased-changed into iron (Fe), quartz (SiO2) and trace amounts of augite (Ca(Fe,Mg)Si2O6) in the metallized pellets. The reduced iron grains aggregate and grow into iron chain crystals, which is the precondition for further iron enrichment either in the magnetic separation or smelting process. After the metallized pellets go through the magnetic separation process, iron powder with an iron content of 91.12% and an iron recovery rate of 86.36% is obtained, while hot metal with an iron content of 94.93% and an iron recovery rate of 97.52% is obtained after the metallized pellets go through the gas smelting process. Energy consumption per ton of product of the rotary hearth furnace direct reduction-gas smelting process is about 30% higher than that of the rotary hearth furnace direct reduction?magnetic separation process.关键词
铜渣/转底炉/磁选/燃气熔分/能耗Key words
copper slag/rotary hearth furnace/magnetic separation/gas smelting/energy consumption分类
矿业与冶金引用本文复制引用
曹志成,孙体昌,薛逊,刘占华..铜渣转底炉直接还原磁选与熔分工艺比较[J].中南大学学报（自然科学版）,2017,48(10):2565-2571,7.基金项目
北京市科技专项项目(Z151100001615027)(Project(Z151100001615027) supported by the Beijing Science and Technology Special Project) （Z151100001615027）
