Development of a comminution test method for small ore samples

Heiskari, Hannu; Kurki, P.; Luukkanen, Saija; Sinche-Gonzalez, Maria; Lehto, Harri; Liipo, Jussi

doi:10.1016/j.mineng.2018.10.005

Cited by 11 publications

(6 citation statements)

References 6 publications

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“…Mwanga, Rosenkranz, and Lamberg (2015) give a short review of existing comminution test methods suitable for geometallurgical investigations. One of the methods is the Outotec Mergan mill, developed originally by Niitti (1970), and its usability as a part of a geometallurgical testing procedure was confirmed recently by Heiskari (2017) and Heiskari et al (2018). Mergan grinding tests enable prediction of the Bond work index quickly while using only a small (2-3 kg) sample.…”

Section: Discussionmentioning

confidence: 99%

Geometallurgical characterization of South Georgian complex copper-gold ores

Liipo¹,

Hicks²,

Takalo³

et al. 2019

J. S. Afr. Inst. Min. Metall.

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The complexity of copper-gold ores leads to large variations in recoveries and concentrate grades in the processing plant. Detailed chemical and mineralogical studies revealed considerable variation in the ratios of chalcopyrite, chalcocite, and oxidized copper minerals in the ore types studied. The end-member ore types are chalcopyrite-dominated and chalcocite-dominated, while most of the ore types plot between these end-members. In addition, increasing amounts of copper oxide and sulphate minerals result in a decreased response to flotation. Good recoveries and concentrate grades can be achieved from the chalcopyritedominated ore type, while the more altered chalcocite-dominated ore type is more challenging to enrich.

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Section: Discussionmentioning

confidence: 99%

Geometallurgical characterization of South Georgian complex copper-gold ores

Liipo¹,

Hicks²,

Takalo³

et al. 2019

J. S. Afr. Inst. Min. Metall.

Self Cite

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“…Geometallurgy requires abundant data to create statistically valid spatial models and one way of obtaining such data is via small-scale proxy tests which, by design, use small sample size and are less expensive to perform than full scale metallurgical tests (e.g. (Kojovic et al, 2010a, b: Kojovic andWalters, 2012;Mwanga et al, 2015;Heiskari et al, 2019). While small scale tests for comminution are reaching a mature stage, small sample tests for recovery are still at a developmental stage especially in flotation (see references in Table 1).…”

Section: Current State Of Geometallurgymentioning

confidence: 99%

A Special Issue Dedicated to Geometallurgy: Preface

et al. 2019

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Geometallurgy is an interdisciplinary field aimed at describing potential ore deposits in terms that mine planners and economists can use to design and run profitable mining operations. The major geologic contribution to the field is defining the spatial variability of potential and active mining resources so that planning and scheduling can accurately predict the economic performance and environmental impact of mining in time to respond efficiently to variations in ore type. This information is needed at the feasibility stage and throughout the mine life. We review the available literature on how geologists have contributed to these predictions in the past. There have been substantial advances in predicting comminution behavior. Prediction of recovery and environmental impacts are less advanced. This introductory paper provides a brief review of geometallurgy and a synopsis of the papers in the Special Issue, along with suggestions on future directions.

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“…Extracted ore grindability is especially relevant here, since the value of this parameter is the main overall energy need indicator for size reduction processes. Understanding and characterizing ore grindability variability is one of the most important parts of the geometallurgical framework, and is essential for optimizing production, since the information about ore blocks' hardness, mineralogy, and metallurgical response guides mining and processing planning and management (Heiskari et al 2019). Grain size and the association of the minerals contained in the ore body usually vary, directly affecting the processing plant feed.…”

Section: Introductionmentioning

confidence: 99%

Comparison of Statistical versus Stochastic Models for Work Index Determination in Quartz-Marble Mixtures

Pérez¹,

Vargas²,

Mellado³

et al. 2021

Mining Scince

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The required work for ore trituration is represented by the Bond Work Index value and is determined by the grindability test for ball mills. This article examines the grinding behavior of ore blends with different mechanical properties in standard ball mills. The goal of this research was to compare statistic and stochastic models of the Work Index value for mixtures of quartz and marble at different proportions of each material. Quartz and marble bearing rocks were selected for this study due to the high difference between the Work Index value of each material, making the variability of the results more evident. Work Index values obtained for each mixture are shown, from which a deterministic model was proposed defined by data regression. The novelty of this research lies in the non-linear model, which was the best fit for the Work Index value of the quartz-marble blends. Our methodology allows us to build more accurate models and can be used for quartz-marble blends and other materials.

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Development of a comminution test method for small ore samples

Cited by 11 publications

References 6 publications

Geometallurgical characterization of South Georgian complex copper-gold ores

Geometallurgical characterization of South Georgian complex copper-gold ores

A Special Issue Dedicated to Geometallurgy: Preface

Comparison of Statistical versus Stochastic Models for Work Index Determination in Quartz-Marble Mixtures

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