Sustainable Processing of Mineral Resources

Rosenkranz, Jan; Lamberg, Pertti

doi:10.5188/ijsmer.20.17

Cited by 6 publications

(2 citation statements)

References 8 publications

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“…The availability of easy‐to‐process ores is declining, and mining operations are being forced to process low grade, complex ores . This has brought additional challenges to mineral processing since very often these ores have to be ground to a finer particle size, and in some cases, they have a high clay mineral content, which leads to significant changes in mineral slurry rheology . Complex flow behaviours in slurries can affect most unit operations such as grinding, flotation, and dewatering .…”

Section: Introductionmentioning

confidence: 99%

Slurry rheology in mineral processing unit operations: A critical review

2019

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Knowledge of slurry rheology in mineral processing is essential for the optimization of wet-grinding, dewatering, transport, and tailings management and it is becoming important in flotation due to the increasing need to process complex ores with a high clay mineral content. Slurries of these ores often display complex rheological behaviour even at low solids concentration, and traditional rheology measurements in mineral processing, such as yield stress and apparent viscosities, may not provide the critical information needed for process optimization. The objective of this paper is to provide a comprehensive review of some of the previous rheology studies performed at the bench, pilot plant, and industrial scale for different unit operations and to discuss the potential for alternative rheology measurements to provide a better insight into colloidal particle interactions in slurries with clay minerals. Firstly, the fundamentals of slurry rheology and the influence of colloidal particles are presented. Secondly, rheology measurements for suspensions are described briefly. Thirdly, a review of rheology studies in grinding, classification, flotation, dewatering, and tailings management is done, outlining possible ways of determining types of particle associations in slurries. Finally, recommendations for future research directions are provided.

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Section: Introductionmentioning

confidence: 99%

Slurry rheology in mineral processing unit operations: A critical review

2019

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“…This results in new challenges for the enrichment industry, because often these types of ores must be subjected to a deeper grinding stage than conventional ores, or they contain organic carbon, which is one of the refractory factors [2]. It is also known that the presence of organic carbon, has a significant impact on the rheological parameters of mineral suspensions, as well as the content of clay minerals [3]. The mixing of a liquid continuous and a solid discrete medium creates a new continuous medium, a suspension, whose properties differ from the properties of the individual components [4].…”

Section: Introductionmentioning

confidence: 99%

Development of method to assess separation process taking into account rheological properties of mineral slurry

Potemkin¹,

Aleksandrova²

2021

J Appl Eng Science

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This article considers the possibility of developing a methodology for assessing the separation process of gold-sulfide raw materials, taking into account the rheological characteristics of the mineral suspension. The object of the study is the ore of the Mayskoye deposit, which is subjected to fine crushing followed by cyanidation, so the consideration of rheological properties is the most important aspect of achieving the necessary enrichment performance. In the course of the research, using the object-oriented programming language Python 3.8, a program for calculating the empirical coefficients of the three-component rheological equation was developed. The resulting equation is the determinant for the shear stress within the suspension as a function of the velocity gradient. The developed program has been used to calculate coefficients of rheological equations for three variants of solid concentration in feed which correspond to the minimum, average and maximum for hydrocyclone used in the research (400 g/l, 500 g/l and 700 g/l respectively). Then, using the Ansys Fluent software, the multiphase classification modeling problem in the hydrocyclone was solved, resulting in shear rate profiles in the cross-section of the apparatus, from which the conditions necessary for the suspension to reach a fully dispersed state were concluded. It was determined that solid concentration 400 g/l is the optimum value that ensures maximum dispersion of the mineral slurry.

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