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Author: | Oteng-Peprah, Michael |
Title: | Influence of mineralogy on upgrading of Polish copper ores |
Publication type: | Master's thesis |
Publication year: | 2010 |
Pages: | viii + 60 s. + liitt. Language: eng |
Department/School: | Kemian laitos |
Main subject: | Prosessien ohjaus ja hallinta (Kem-90) |
Supervisor: | Jämsä-Jounela, Sirkka-Liisa |
Instructor: | Drzymala, Jan |
OEVS: | Electronic archive copy is available via Aalto Thesis Database.
Instructions Reading digital theses in the closed network of the Aalto University Harald Herlin Learning CentreIn the closed network of Learning Centre you can read digital and digitized theses not available in the open network. The Learning Centre contact details and opening hours: https://learningcentre.aalto.fi/en/harald-herlin-learning-centre/ You can read theses on the Learning Centre customer computers, which are available on all floors.
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Location: | P1 Ark Aalto 3489 | Archive |
Keywords: | upgrading curves mineralogy flotation |
Abstract (eng): | Upgrading curves play a significant role in the visualization and analysis of mineral separation results. Analysis of any separation from the upgrading point of view takes into account certain basic components such as the yield and content. Since these components can be combined into an unlimited number of new parameters, there are many upgrading curves. Each curve has its own unique way of analysing separation results. However, all these curves are generated from separation results without considering the influence of mineralogy on them. The thesis centres on the influence of mineralogy on the upgrading of Polish copper ore. The literature part of this thesis reviewed the theory of upgrading and separation curves. Many upgrading curves and their characteristics are described. Chemometric analysis and their application are also discussed in the literature part and mathematical equations for the upgrading of separation results reviewed. The data used for this thesis was obtained from three mineral processing plants in Poland and included data on flotation results, mineralogy results and litho logical layer percentages. Geological samples were taken from different mining areas of the processing plant with sandstone, shale and dolomite as the lithological layers. Fuerstenau and Halbich upgrading curves are used for the approximation and determination of upper maximum practical copper content respectively. Fuerstenau upgrading curves are drawn for the flotation results. These curves were approximated with a characteristic equation into a single parameter which characters the whole upgrading curve. This parameter was changed into a parameter F on the Fuerstenau upgrading curve through an equation. The maximum practical copper content (MPC) in the concentrate was obtained by using the Halbich upgrading curve. Maximum theoretical copper content (MTC) was determined through calculation from the mineralogical results. A calibration curve was developed which correlates maximum practical content and upper maximum theoretical content. Chemometric analyses between the copper content, the flotation parameter and mineralogical results were conducted to identify the influence of minerals on flotation and copper content in the concentrate. The same analysis was conducted on the flotation parameter and the lithological layer results. The results of the experiments showed that galena and pyrite are detrimental to the flotation of copper while the presence of bornite enhanced the copper content in the concentrate. Lithological chemometric analysis showed shale as responding poorly to flotation. The calibration curve which was developed can aid in forecasting and predicting the copper content in the concentrate by conducting mineralogical analysis. This curve is, however case specific and cannot be applied to other ores with different mineralogical characteristics. |
ED: | 2010-10-12 |
INSSI record number: 41053
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