1. Breakage function for HPGR: mineral and mechanical characterization of tantalum and tungsten ores
- Author
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Marc Bascompta, Antoni Escobet, Teresa Escobet, José Juan de Felipe, David Parcerisa, Hernan Anticoi, Lluís Sanmiquel, Rosa Argelaguet, Sarbast Ahmad Hamid, Maite Garcia-Valles, Esteban Peña-Pitarch, Pura Alfonso, Eduard Guasch, Josep Oliva, Universitat Politècnica de Catalunya. Departament d'Enginyeria Minera, Industrial i TIC, Universitat Politècnica de Catalunya. Departament d'Enginyeria Mecànica, Universitat Politècnica de Catalunya. GREMS - Grup de Recerca en Mineria Sostenible, Universitat Politècnica de Catalunya. SAC - Sistemes Avançats de Control, Universitat Politècnica de Catalunya. SIC - Sistemes Intel·ligents de Control, Universitat Politècnica de Catalunya. SUMMLab - Sustainability Measurement and Modeling Lab, Universitat Politècnica de Catalunya. SIR - Service and Industrial Robotics, and Universitat de Barcelona
- Subjects
Mineralogia ,Materials science ,Enginyeria civil::Geologia::Mineralogia [Àrees temàtiques de la UPC] ,02 engineering and technology ,Tantalum ,010502 geochemistry & geophysics ,Màquines de mòlta ,01 natural sciences ,breakage ,comminution ,modelling ,mineralogy ,Modelling ,020501 mining & metallurgy ,Mineral deposits ,Tàntal (Química inorgànica) ,Brittleness ,Breakage ,Comminution ,Minerals -- Anàlisi ,0105 earth and related environmental sciences ,Compacting ,Assaying ,Metallurgy ,Minerals--Anàlisi ,Geology ,Compactació ,Geotechnical Engineering and Engineering Geology ,Compression (physics) ,Mineralogy ,Jaciments minerals ,Grinding ,Characterization (materials science) ,Distribution function ,Compressive strength ,Enginyeria civil::Enginyeria de mines [Àrees temàtiques de la UPC] ,0205 materials engineering ,Grinding machines - Abstract
The modelling of high pressure grinding rolls is described by the population balance model, a mass balance which includes several functions that are related to the mineral characteristics, material kinetics and operative conditions of the device. The breakage distribution function is one of these functions and refers to the way in which the daughter particles are generated by the process of comminution. The piston-die press is presented as a methodology to determine the breakage distribution function of two different materials, from the mechanical response point of view: altered granite and a cal-silicate material. The aim is to determine the relation between the operative conditions and the mineral characteristics in order to explain and predict the breakage function parameters. The materials were characterised using XRD and single compression strength tests. The altered granite is a brittle material, which generates more fines under single compression conditions compared to bed compression conditions, mainly due to the mineral composition and the response of the material to the breakage action. The cal-silicate material shows a normal trend in its breakage behaviour. As is expected, the mineralogical characterisation is a useful tool to predict the values of the parameters of the breakage distribution function.
- Published
- 2018