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EVOLUTION OF AG MILL SHELL LINER DESIGN AT THE GOL-E-GOHAR IRON ORE CONCENTRATION PLANT
By
M. Maleki-Moghaddam, A. R. Hasankhoei , E. Arghavani A. Haji-Zadeh, M. Yahyaei and S. Banisi
Published in
SAG Conference
at
2015
Direct link:
http://kmpchemmat.ir/pii/68957
Abstract
The Gol-E-Gohar iron ore concentration plant uses three 9 m × 2.05 m autogenous mills (AG) in parallel in a dry operation. The AG mills shells are lined with three 57 cm liners in length in 36 rows. To increase the circuit throughput it was proposed to convert the AG mills to SAG mills. Simulation of the charge trajectory indicated that increasing the liner lifter face angle from 7 to 30° while maintaining the original lifter height (i.e., 22.5 cm) could provide an appropriate charge trajectory in SAG mode. Installation of the new liners and conversion of AG mill No. 2 to SAG mill, by adding 5% (v/v) balls, resulted in an overall increase of 31% in throughput (from 419 to 548 t/h) while the P80 of product decreased from 516 to 496 μm.
Keywords
AG/SAG mill, shell liner, Gol-E-Gohar iron ore, wear profile, non-uniform design
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