Development of new analysis methods for the characterization and classification of wet sticky ores

Plinke, Jens; Prigge, Jan-Dirk; Williams, Kenneth C.

doi:10.1016/j.powtec.2016.02.044

Cited by 5 publications

(1 citation statement)

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“…The rapid consumption of near surface iron ore deposits in Australia has led to mining deeper deposits which are located close or even beneath the water table [1]. The resulting increase of the inherent moisture for the run-of-mine material leads to more cohesive and adhesive behaviours, which cause poor flowability in material handling chains [2]. Therefore, it is an industry standard to monitor the flowability of bulk materials to minimise potential blockages.…”

Section: Introductionmentioning

confidence: 99%

On uniaxial compression and Jenike direct shear testings of cohesive iron ore materials

et al. 2017

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The flow function of an iron ore material governs its flowability characteristics in material handling chains 4 of the resource industry. A uniaxial compression test is able to obtain a flow function more rapidly comparing to the 5 Jenike direct shear test, nevertheless, results often exhibit lower rankings using the former method. This study aims to 6 investigate the fundamental stress states within the test specimen that led to this phenomenon, and to introduce a new 7 uniform density specimen preparation method for a uniaxial compression test in order to achieve comparative flow 8 functions as per a Jenike direct shear test. The minimisation of the wall friction effect and the achievement of the critical 9 state when preparing a uniaxial specimen were explicitly discussed. Experimental investigations on flow functions of a 10 suite of Australian iron ore samples were conducted using both the uniform density uniaxial compression test and the 11 Jenike direct shear test. Results from both methods were indicated to be comparable providing the specimen exhibited cohesive flow behaviours. Additionally, a simple compressibility indexl, based on the bulk density test of iron ore samples, was derived as a threshold to indicate if a uniform density uniaxial compression test can produce flow functions matching the Jenike direct shear test. The outcome of this research enabled a rapid and reliable flow function testing method for cohesive iron ore materials.

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Section: Introductionmentioning

confidence: 99%