Study on recovery of iron containing in reverse-flotation tailings of iron ore
With the rapid development of the steel industry, the proportion of iron ore tailings in the industrial solid waste is growing. Great deal of tailings not only take up land, resulting in the waste of resources, but also bring serious pollution to the environment. In the meantime, with the exploitation of the mineral resources, the amounts of mineral resources decrease increasingly, the tailings as a secondary resource have been paid more attention in world-wide. Based on the result of process mineralogy of the flotation tailings from an iron processing plant, the grade of Fe, the iron minerals, the gangue minerals and the hazard substances were found respectively. According to series of scientific tests, the flow sheet of desliming, screening, shaking table, magnetic separation and reverse-flotation were tested to be more appropriate to recover the iron minerals from flotation tailings of the iron ore. The results have been achieved as follows; the iron grade, and yield, and iron recovery of the gravity concentrate were 65. 48％ , 5. 09％ , and 16. 88％ respectively; The iron grade, and yield, iron recovery of the flotation concentrate were 65. 36％ , 9. 36％ , and 31. 04％ respectively. When these two concentrates were merged, the iron grade, yield and iron recovery of the ultimate concentrate were 65. 40％ , 14. 45％ , and 47. 92％ respectively. The achievement of these separation indexes is due to the following reasons. One reason is that the separation flowsheet accords with the tailings properties, the outstanding feature of the flowsheet was the fine particles composed of the overflow of hydrocyclone and the materials of other separation stages were fed to the magnetic separation, therefore the recovery of fine particles of iron minerals has been enhanced. The other reason is that the separation behaviours of fine particles can be controlled effectively and the gravity separation process was intensified and optimized by using desliming, screening and shaking table, which is of great significance to upgrade the grade and recovery of iron.
reverse-flotation tailings of iron ores iron recovery fine particles gravity concentration magnetic separation reverse-flotation
Shuling Gao Dezhou Wei Wengang Liu Zichuan Guan
College of Resources & Civil Engineering, Northeastern University 11 3rd Street, Wenhua Road, 110004, Shenyang, China
国际会议
The 19th International Biohydrometallurgy Symposium(第19届国际生物湿法冶金大会 IBS2011)
长沙
英文
1053-1058
2011-09-18（万方平台首次上网日期，不代表论文的发表时间）