Effect of Operating Parameters on the Performance of Spiral Concentrator

Kari, Chandrakala and Kapure, Gajanan and Rao, S Mohan (2006) Effect of Operating Parameters on the Performance of Spiral Concentrator. In: Proceedings of the International Seminar on Mineral Processing Technology and Indo-Korean Workshop on Resource Recycling (MPT-2006), March 8-10, 2006, NML, Chennai.



Spiral concentrator, a critical device in the mineral sand beneficiation circuit, separates minerals based on their specific gravity differences. The effect of diffe-rent operating parameters on the performance of Spiral has been studied through optimization experiments at different feed flow rates and splitter positions for four feed pulp densities ranging from 25- 10%. The raw sand used in exper-imentation contains 12.5% slimes and 11% heavy mineral concentrate, out of which 80% was in the particle size range of —250 + 106 pm. It has been observed that with increase in feed flow rate the grade of concentrate increased but as expected the recoveries decreased significantly. Medium feed flow rate, i.e, 3.0-3.5 m3/hr was found to be optimum in order to obtain the concentrate with greater than 93.5% HMC and high recoveries of >96%. Concentrate grade improved as the feed pulp densities increased.The Spiral concentrator has performed better at feed pulp density of 30% by producing concentrate of high grade (93.5%) and with highest recoveries of 96%. The desliming of raw sand has been done using using hydrocyclone. When the deslimed feed is fed to the spiral, high concentrate grades has been produced with very high recoveries as high as 98%.

Item Type:Conference or Workshop Item (Paper)
Official URL/DOI:http://eprints.nmlindia.org/6252
Uncontrolled Keywords:Spiral concentrator; splitter positions; mineral sand beneficiation
Divisions:Mineral Processing
ID Code:6252
Deposited By:Sahu A K
Deposited On:14 Dec 2012 15:10
Last Modified:14 Dec 2012 15:10
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