Application of Flash Magnetizing Roasting Technique in Beneficiation of Siderite and Limonite
Siderite and limonite are well known refractory ores featuring low theoretical grade and complicated association with gangue minerals which usually differ little from siderite and limonite in specific gravity,specific susceptibility,surface hydrophobicity and specific conductivity. Therefore,satisfactory beneficiation results for them can be hardly obtained by physical means. Even if iron concentrates almost having a theoretical grade are obtained at the cost of loss of iron recovery,they can not be used in sintering process in large quantity due to the structure of the ores. In view of the problem,a technique of flash magnetizing roasting is developed to transform siderite and limonite into artificial magnetite so as to enlarge the difference between siderite/limonite and gangue minerals and realize effective separation of the ores. Through comparing the results of separation after magnetizing roasting of siderite and limonite with those by physical means,it is found that the grade of iron concentrates is increased by 6-15％,the recovery of iron by 15-20％. The technique of flash magnetizing roasting,characterized by fast mass and heat transfer and short reaction time,has advantages such as low roasting cost and high feasibility.
Siderite Llimonite Magnetizing roasting
YU Yongfu CHEN Wen
Wuhan University of Technology,Wuhan P.R.China,430070 Changsha Research Institute of Mining and Metallurgy,Changsha P.R.China,410012
国际会议
The 2010 International Symposium on Project Management(2010年首届工程管理国际研讨会)
江苏沭阳
英文
13-17
2010-07-01（万方平台首次上网日期，不代表论文的发表时间）