Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy最新文献_第10页

Computational modelling of particle-fluid dynamics in comminution and classification: a review 粉碎和分类中颗粒流体动力学的计算建模：综述

IF 1.2

Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2020-01-06 DOI: 10.1080/25726641.2019.1708657

N. Mangadoddy, Teja Reddy Vakamalla, Mayank Kumar, A. Mainza

{"title":"Computational modelling of particle-fluid dynamics in comminution and classification: a review","authors":"N. Mangadoddy, Teja Reddy Vakamalla, Mayank Kumar, A. Mainza","doi":"10.1080/25726641.2019.1708657","DOIUrl":"https://doi.org/10.1080/25726641.2019.1708657","url":null,"abstract":"ABSTRACT Comminution and classification are the two major unit operations involved in the processing of pure minerals from its ore rocks. In the current paper, an assessment is made on different numerical models used for the prediction of fluid and solid flow properties in tumbling mill, hydrocyclone and dense medium cyclone (DMC). A detailed discussion on the selection of suitable turbulence and multiphase models for the accurate prediction of flow field in hydrocyclone is made by comparing the predictions among and against experimental data. The additional requirements for accurate performance predictions at high feed solid content is elaborated. The drawbacks of DPM model and the usage of CFD-DEM coupling technique to predict the coal partition curve in DMC’s has been elucidated. The discrepancies between DEM, CFD, one way and two way coupled CFD-DEM predicted mean flow field and particle dynamics against experimental measurements in tumbling mills also made in detail.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"129 1","pages":"145 - 156"},"PeriodicalIF":1.2,"publicationDate":"2020-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2019.1708657","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49512481","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 15

Decision support for ore sorting and preconcentration in gold applications 黄金应用中矿石分选和预富集的决策支持

IF 1.2

Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2020-01-02 DOI: 10.1080/25726641.2019.1652488

R. Bearman, D. J. Bowman, R. Dunne

引用次数: 0

Kibali Gold Mine sulphide concentrate treatment – understanding the preoxidation of sulphide concentrates 基巴利金矿硫化物精矿处理——了解硫化物精矿的预氧化

IF 1.2

Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2020-01-02 DOI: 10.1080/25726641.2019.1631633

T. Mahlangu, F. A. Sumaili, Dieudonne Ntamb Ayizi, B.M. Sindani, P. Mande, G. D. du Toit, Martijn Verster, S. Mogashoa, P. Lotz

{"title":"Kibali Gold Mine sulphide concentrate treatment – understanding the preoxidation of sulphide concentrates","authors":"T. Mahlangu, F. A. Sumaili, Dieudonne Ntamb Ayizi, B.M. Sindani, P. Mande, G. D. du Toit, Martijn Verster, S. Mogashoa, P. Lotz","doi":"10.1080/25726641.2019.1631633","DOIUrl":"https://doi.org/10.1080/25726641.2019.1631633","url":null,"abstract":"ABSTRACT Kibali Gold Mine (KGM) processing plant treats both free milling and partially refractory ores. The flotation concentrate, is subjected to ultrafine grinding in 8 parallel FLS VXP 2500 ultrafine grinding (UFG) mills and undergoes a two stage preoxidation process at controlled pH of 10.2, prior to cyanidation. The primary objective of preoxidation is to reduce the reactivity of sulphide surfaces and thus reduce cyanide and oxygen demand downstream. Complex interactions amongst operational parameters of feed density, pH and dissolved oxygen concentration, complicates the circuit. This work demonstrates the impact of these interactions on gold dissolution and cyanide consumption. Aggressive preoxidation conditions have shown that the sulphide oxidation reactions not only increase temperatures but also generate cyanicides consistent with observed high cyanide consumption and poor dissolved oxygen concentration. From the extensive analysis of plant data and laboratory testwork, the plant has established and defined a niche operating domain for optimal preoxidation processes. This has been shown by the resultant drop in the sulphide concentrate residues from above 5 g/t at commissioning to below 3 g/t, currently achieved.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"129 1","pages":"74 - 86"},"PeriodicalIF":1.2,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2019.1631633","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43204672","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Potential of the dense media cyclone for gold ore preconcentration 重介质旋流器预选金矿的潜力

IF 1.2

Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2020-01-02 DOI: 10.1080/25726641.2019.1669982

N. Mkandawire, T. McGrath, A. Bax, J. Eksteen

引用次数: 2

X-Ray computed tomography for 3D analysis of gangue mineral rejection by gravity preconcentration of sulfidic gold ores X射线计算机断层扫描对硫化金矿石重力预富集脉石排矿率的三维分析

IF 1.2

Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2020-01-02 DOI: 10.1080/25726641.2019.1643133

S. Bacchuwar, N. Mkandawire, T. McGrath, C. L. Lin, J. Miller

{"title":"X-Ray computed tomography for 3D analysis of gangue mineral rejection by gravity preconcentration of sulfidic gold ores","authors":"S. Bacchuwar, N. Mkandawire, T. McGrath, C. L. Lin, J. Miller","doi":"10.1080/25726641.2019.1643133","DOIUrl":"https://doi.org/10.1080/25726641.2019.1643133","url":null,"abstract":"ABSTRACT Specific gravity washability curves used in the coal industry to define the theoretical gravity separation efficiency can be used in the same way for evaluation of preconcentration operations in the metal mining industry. These theoretical metal recovery/gangue rejection curves, which establish the maximum in gravity separation efficiency, can be determined from three-demensional (3D) image analysis by high resolution X-ray microtomography (HRXMT) rather than by sink-float analysis using heavy liquid fractionation. In this way, the tedious, time-consuming, and toxic use of heavy liquids for laboratory sink-float analysis is avoided. In addition to the theoretical gravity separation efficiency curves by HRXMT, further 3D particle information on mineral composition and texture is obtained, including grain size distribution. Experimental HRXMT results for two sulfidic gold ores are presented and compared to the results from dense media cyclone experiments in order to evaluate the efficiency of gangue mineral rejection.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"129 1","pages":"49 - 63"},"PeriodicalIF":1.2,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2019.1643133","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43725602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Characterising the effect of different modes of particle breakage on coarse gangue rejection for an orogenic gold ore 研究了不同破碎方式对某造山带金矿粗矸排出率的影响

IF 1.2

Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2020-01-02 DOI: 10.1080/25726641.2019.1702802

P. Bode, T. McGrath, J. Eksteen

{"title":"Characterising the effect of different modes of particle breakage on coarse gangue rejection for an orogenic gold ore","authors":"P. Bode, T. McGrath, J. Eksteen","doi":"10.1080/25726641.2019.1702802","DOIUrl":"https://doi.org/10.1080/25726641.2019.1702802","url":null,"abstract":"ABSTRACT Enrichment and metal deportment metallurgical parameters, indicative of the propensity for a comminuted ore to preferentially concentrate metal into multiple density fractions during coarse particle gangue rejection (CPGR) by float–sink separation technique, were developed and applied. Including, a coarse separation enrichment deportment index (EDI) parameter metric to describe a comminuted ore overall preferential grade by density deportment response. The parameters describe the extent of gangue and value component liberation as a measurable rock property that is a function of both particle breakage regime and downstream separation technique. Ultimately the methodology provides metallurgical metrics for measuring the separation performance by the liberation of gangue in fine crushed comminuted ores. In this study, various laboratory-scale fine crushing mechanical and non-mechanical electric pulse SELFRAG Lab devices treated a Ballarat region gold ore to achieve a particle size of ≤2.00 mm to evaluate ore amenability for CPGR and preconcentration potential.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"129 1","pages":"35 - 48"},"PeriodicalIF":1.2,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2019.1702802","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43382074","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 4

Application of a co-adsorption model for the design of CIL/CIP circuits 共吸附模型在CIL/CIP电路设计中的应用

IF 1.2

Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2020-01-02 DOI: 10.1080/25726641.2019.1643131

A. Bax, G. Wardell-Johnson, W. Staunton

引用次数: 0

Enhancing gold recovery from refractory bio-oxidised gold concentrates through high intensity milling 通过高强度研磨提高难熔生物氧化金精矿的金回收率

IF 1.2

Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2020-01-02 DOI: 10.1080/25726641.2019.1658915

R. Asamoah, W. Skinner, J. Addai-Mensah

{"title":"Enhancing gold recovery from refractory bio-oxidised gold concentrates through high intensity milling","authors":"R. Asamoah, W. Skinner, J. Addai-Mensah","doi":"10.1080/25726641.2019.1658915","DOIUrl":"https://doi.org/10.1080/25726641.2019.1658915","url":null,"abstract":"ABSTRACT This paper aims at investigating the gold leaching behaviour of refractory, bio-oxidized flotation gold concentrates, before and after high intensity milling, for enhancing gold extraction. Specifically, the role of factors such as milling time and ceramic balls-to-pulp mass ratio, coupled with corresponding physico-chemical changes on gold extraction yield and leaching kinetics was studied. From the results, high intensity milling of the bio-oxidised flotation concentrate reduced the average particle size by increasing the fraction of fines mainly through abrasion/attrition, and increased surface area by both fine particle and crevice production. Furthermore, notable increase in sodium cyanide consumption was observed with an increase in the mechanical stress deployed, consistent generally with degree of mineral relative amorphisation and reactive gangue mineral exposure. About 1.6–1.8 times variable increase in gold yield was observed after 24 h cyanide leaching of activated samples, irrespective of the impacted mechanical stress and degree of mineral amorphisation.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"129 1","pages":"64 - 73"},"PeriodicalIF":1.2,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2019.1658915","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43071515","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 12

Gangue rejection responses for a variety of gold ores 多种金矿的脉石排斥反应

IF 1.2

Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2020-01-02 DOI: 10.1080/25726641.2019.1631077

T. McGrath, A. Bax, J. Eksteen, J. McGrath

引用次数: 0

INCO Cyanide destruction insights from plant reviews and laboratory evaluations 来自工厂审查和实验室评估的氰化物破坏见解

IF 1.2

Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy Pub Date : 2020-01-02 DOI: 10.1080/25726641.2019.1633506

P. Breuer, D. Hewitt

{"title":"INCO Cyanide destruction insights from plant reviews and laboratory evaluations","authors":"P. Breuer, D. Hewitt","doi":"10.1080/25726641.2019.1633506","DOIUrl":"https://doi.org/10.1080/25726641.2019.1633506","url":null,"abstract":"ABSTRACT Insights from a number of INCO cyanide destruction process reviews and studies are presented and discussed. In particular, the performance of three plants are discussed in terms of reagent (sulfite and oxygen) stoichiometry and utilisation, and the impact of process design, control, reagent addition points and slurry properties. Discussed also is the effectiveness of hydrogen peroxide use (supplementary oxygen source) in two of the plants reviewed. Oxygen mass transfer often limits the capacity of an INCO process. Hydrogen peroxide addition can improve the capacity, though process design improvements could provide a better economic outcome. Optimisation of the INCO process requires constant monitoring of feed and discharge weak acid dissociable cyanide concentrations and maintaining low but measurable dissolved oxygen in the reactor (e.g. 2–5 mg L−1). Changing solids properties over time requires adjustment to the sodium metabisulfate-to-weak acid dissociable cyanide weight ratio used for the destruction process control.","PeriodicalId":43710,"journal":{"name":"Mineral Processing and Extractive Metallurgy-Transactions of the Institutions of Mining and Metallurgy","volume":"129 1","pages":"104 - 113"},"PeriodicalIF":1.2,"publicationDate":"2020-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1080/25726641.2019.1633506","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49198387","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6