To identify and establish beneficiation techniques for slime, a comprehensive research work was carried out on beneficiation plant 2 thickener underflow (Tailing). Iron ore slimes (-45micron ~80.0%) generated at beneficiation plant 2 assaying 46.7% Fe, 10.82% SiO2, and 4.58% Al2O3 have been subjected to various beneficiation studies like cyclone, wet high intensity magnetic separator and flotation to recover the iron bearing minerals. The effects of different operating parameters have been studied to get a product suitable for pellet making. Detailed beneficiation studies indicate that it is possible to obtain a product containing 61.8% to 66.6% Fe, 1.80% to 3.35% SiO2, and 1.65% to 2.40% Al2O3 with 8.0% to 22.3% weight recovery by adopting de-sliming followed by magnetic separation. Within this product grade range the pellet grade fines (JSW norms-minimum 63.0% Fe) consist of 63.0% Fe, 2.97% SiO2 and 2.48% Al2O3 with 16.9% weight recovery and 56.9% Fe recovery at 0.5Tesla magnetic field intensity, pulsation rate 230rpm and 2min residence time.
References
[1]
N. Prasad, M. A. Ponomarev, S. K. Mukherjee, P. K. Sengupta and S. K. Gupta, “Introduction of New Technologies for Beneficiation of Indian Hematite Ores,” Reduction of Looses and Increase in Their Quality,” In: K. S. E. Forssberg, Ed., Proceedings of XVI International Mineral Processing Congress, Stockholm, 1998, pp. 1369-1380.
[2]
B. Das, S. Prakash, B. K. Mohapatra, S. K. Bhaumik and K. S. Narashimhan, “Beneficiation of Iron Ore Slimes Using Hydrocyclone,” Mineral and Metallurgical Processing, Vol. 9, No. 2, 1994, pp. 101-103.
[3]
S. Pradeep, “Beneficiation of Indian Iron Ore Slimes,” Minerals & Metallurgical Processing, Vol. 6, No. 3, 1994, pp. 179-194.
[4]
S. Roy and A. Das, “Characterization and Processing of Low Grade Iron Ore Slime from Jilling Area of India,” Mineral Processing and Extractive Metallurgy Review: An International Journal, Vol. 29, 2008, pp. 213-231.
doi:10.1080/08827500801997886
[5]
G. V. Rao and M. I. Ansari, “Recovery of Iron Ore Superfines and Water from Slimes of Bolani Iron Ore Washing Plant,” Transactions of the Indian Institute of Metals, Vol. 46, No. 2, 1993, pp. 51-55.
