Optimization of the design of AG mill shell liners at the Gol-E-Gohar concentration plant

Maleki-Moghaddam, M., Yahyaei, M., Haji-Zadeh, A., Asadi, H. and Banisi, S. (2014). Optimization of the design of AG mill shell liners at the Gol-E-Gohar concentration plant. In: Juan Yianatos, XXVIl International Mineral Processing Congress - IMPC 2014: Conference Proceedings. XXVII International Mineral Processing Congress - IMPC 2014, Santiago, Chile, (15-24). 20-24 October 2014.

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Name Description MIMEType Size Downloads
Author Maleki-Moghaddam, M.
Yahyaei, M.
Haji-Zadeh, A.
Asadi, H.
Banisi, S.
Title of paper Optimization of the design of AG mill shell liners at the Gol-E-Gohar concentration plant
Conference name XXVII International Mineral Processing Congress - IMPC 2014
Conference location Santiago, Chile
Conference dates 20-24 October 2014
Proceedings title XXVIl International Mineral Processing Congress - IMPC 2014: Conference Proceedings
Place of Publication Santiago, Chile
Publisher Gecamin Digital Publications
Publication Year 2014
Sub-type Fully published paper
Open Access Status
Editor Juan Yianatos
Start page 15
End page 24
Total pages 10
Collection year 2015
Language eng
Abstract/Summary One area in AG/SAG milling field which has received a great attention is the optimization of liner design for any application to increase the availability of mills. The Gol-E-Gohar iron ore concentration plant uses three 9m x 2.05m autogenous mills (AG) in parallel in a dry operation. The AG mill shell is lined with three series (57 em each) of 36-row liners. Due to large variations in feed characteristics and inadequate blending, the performance of AG mills has been lower than the target value. Therefore, to improve the comminution efficiency, the optimization of the design of AG mill shell liners was applied in this plant. By simulation it was found that increasing the liner lifter face angle from 7 to 30° while maintaining the original lifter height (i.e., 22.5 em) could provide an appropriate charge trajectory. Measurement of the wear profiles of shell liners indicated that the wear along the liner length was not urtiform and the highest wear occurred between 0.5 m and 1.2 m of the mill length. A new liner design was proposed by redistributing the metal from parts with a lower wear rate to the parts with a higher wear rate to arrive at a uniform wear profile along the liner length at the liner removal time. The non-uniform shell liner was constructed and installed in one of the three parallel dry AG mills. It was found that the first and second liner designs increased the mill throughput by 2.6 and 7.5%, respectively. After conversion to SAG milling on the account of liner change, 18% (from 413 to 489 t/h) increase in throughput was realized. It was predicted that the non-uniform liner designs will increase the liner life time by 10% and will reduce the scrap metal from the current value of 59% to 50%.
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Created: Thu, 20 Nov 2014, 08:25:04 EST by Karen Holtham on behalf of Julius Kruttschnitt Mineral Research Centre