Assessing the Effect of Breakage Mechanism on the Mineral Liberation Properties of a Copper Porphyry Ore
Incomplete liberation of mineral particles is one of the key factors limiting the performance of industrial flotation circuits. This work aims to quantify the relationship between different breakage modes and how these affect mineral liberation properties. A copper porphyry (bornite) ore sample was subjected to breakage using a piston-die compression unit and an impact mill. The particles produced as a result of each mode of breakage were then characterised using Mineral Liberation Analysis (MLA) to quantify the mineralogical and liberation properties of the progeny particles. The impact mill was found to produce bornite that was finer grained relative to the host particles. In contrast, bornite discharged from the piston-die unit closely followed the size distribution of the host particles and was retained to a greater extent in the larger/intermediate size fractions. The results provide insight into what breakage methods are optimal for the purposes of downstream separation.
Comminution Breakage Mechanism Impact Compression HPGR Mineral liberation
T.G. Vizcarra E.M. Wightman
Julius Kruttschnitt Mineral Research Centre (JKMRC), University of Queensland, lndooroopilly, Australia
国际会议
XXIV International Mineral Processing Congress(第24届国际矿物加工大会)
北京
英文
3213-3218
2008-09-24（万方平台首次上网日期，不代表论文的发表时间）