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Willy Andrés Kracht Gajardo

Associate Professor

UNIVERSIDAD DE CHILE

Santiago, Chile

Mineral Processing; Flotation; Geometallurgy; Process Modelling; Integration of Solar Energy to Mining Processes

Mining and Materials Engineering, MCGILL UNIVERSITY. Chile, 2008
Ciencias de la Ingeniería, Mención Metalurgia Extractiva, UNIVERSIDAD DE CHILE. Chile, 2004
Ingeniero Civil Químico, UNIVERSIDAD DE CHILE. Chile, 2004
Licenciado en Ciencias de la Ingeniería, Mención Química, UNIVERSIDAD DE CHILE. Chile, 2002

Associate Professor Full Time

Universidad de Chile

Faculty of Physical and Mathematical Sciences

Santiago, Chile

2018 - A la fecha
Assistant Professor Full Time

UNIVERSIDAD DE CHILE

Faculty of Physical and Mathematical Sciences

Santiago, Chile

2009 - 2017
Instructor Full Time

UNIVERSIDAD DE CHILE

Faculty of Physical and Mathematical Sciences

Santiago, Chile

2005 - 2008

Ebisu, Y. (2018). Behaviour of locked fine particles of the copper sulfides in the deposit of Arqueros project. Master’s thesis, Universidad de Chile. Supervised

San Martín, F. (2018). Biodepression of pyrite with acidithiobacillus ferrooxidans in seawater flotation. PhD thesis, Universidad de Chile. Supervised

Fuenzalida, O. (2018). Model predictive control of froth flotation processes aided by a dynamic simulator. Master’s thesis, Universidad de Chile. Supervised

Pamparana, G. (2017). Simulating the operation of a copper SAG mill, integrated with photovoltaic solar energy and a battery energy storage system. Master’s thesis, Universidad de Chile. Supervised

Morales A., F. (2017). Studying the interaction between seawater and lime in mineral processing systems. Master’s thesis, Universidad de Chile. Supervised

Schwarze, J. F. (2017). Pre-treatment of bituminous copper ore previous to froth flotation. Master’s thesis, Universidad de Chile. Co-supervised

Álvarez, M. (2016). Water/rock interaction and physical-chemical controls in mineral processing: effect of aluminium, calcium and magnesium ions. Master’s thesis, Universidad de Chile. Supervised

Montes, H. (2015). Geometallurgical modelling of the flotation process based on mineralogy and metallurgical tests. Master’s thesis, Universidad de Chile. Supervised

Mesa, D. (2015). Study of the effect of frother type and concentration on froth formation in presence of clays. Master’s thesis, Universidad de Chile. Supervised

Lois, P. (2015). Study of the water-rock interaction during grinding and the physicochemi- cal/geochemical impacts on flotation: Case study on Escondida porphyry. Master’s thesis, Universidad de Chile. Co-supervised

Guarda, N. (2015). Effect of controlled cooling on the energy consumption and recovery of valuable elements in copper smelter slag processing. Master’s thesis, Universidad de Chile. Supervised

Sepúlveda, F. (2015). Evaluation of the use of solar energy in copper electro-wining. Bachelor’s thesis, Universidad de Chile. Supervised

Rothen, R. (2015). Insertion of renewable energies in mining processes. Bachelor’s thesis, Universidad de Chile. Co-supervised

Moraga, C. (2014). Measurement of bubble size using sound and determination of critical coalescence concentration curves at laboratory scale. Master’s thesis, Universidad de Chile. Supervised

Lorca, J. (2014). Technical economical evaluation of using seawater in a concentrator. Bachelor’s thesis, Universidad de Chile. Supervised

Osses, B. (2014). Methodology for generating a spatial model of copper rougher concentrate grade. Bachelor’s thesis, Universidad de Chile. Co-supervised


An LSTM Approach for SAG Mill Operational Relative-Hardness Prediction Avalos, Sebastian; Kracht, Willy; Ortiz, Julian M. Article ISI MINERALS (2020)
Attachment of Acidithiobacillus ferrooxidans to pyrite in fresh and saline water and fitting to Langmuir and Freundlich isotherms San Martin, Francisca; Kracht, Willy; Vargas, Tomas Article ISI BIOTECHNOLOGY LETTERS (2020)
Machine Learning and Deep Learning Methods in Mining Operations: a Data-Driven SAG Mill Energy Consumption Prediction Application Avalos, Sebastian; Kracht, Willy; Ortiz, Julian M. Article ISI MINING METALLURGY EXPLORATION (2020)
Mechanisms of pyrite biodepression with Acidithiobacillus ferrooxidans in seawater flotation San MartÃn F.; Kracht W.; Vargas T.; Rudolph M. Article ISI SCOPUS (2020)
Optimization of a SAG Mill Energy System: Integrating Rock Hardness, Solar Irradiation, Climate Change, and Demand-Side Management Ortiz J.M.; Kracht W.; Pamparana G.; Haas J. Article ISI SCOPUS MATHEMATICAL GEOSCIENCES (2020)
Change of support using non-additive variables with Gibbs Sampler=> Application to metallurgical recovery of sulphide ores Garrido, M; Ortiz, JM; Villaseca, F; Kracht, W; Townleye, B; Miranda, R Article Computers and Geosciences (2019)
Studying the integration of solar energy into the operation of a semi-autogenous grinding mill. Part I=> Framework, model development and effect of solar irradiance forecasting Pamparana G., Kracht W.; Haas J., Ortiz J.M.; Nowak W., Palma-Behnke R. Article Minerals Engineering (2019)
Studying the integration of solar energy into the operation of a semi-autogenous grinding mill. Part II=> Effect of ore hardness variability, geometallurgical modeling and demand side management Pamparana G., Kracht W.; Haas J., Ortiz J.M.; Nowak W., Palma-Behnke R. Article Minerals Engineering (2019)
The influence of seawater on magnetite tailing rheology Reyes, Cristian.; Alvarez, Matias; Ihle, Christian F.; Contreras, Matias; Kracht, Willy Article ISI SCOPUS MINERALS ENGINEERING (2019)
Biodepression of pyrite using Acidithiobacillus ferrooxidans in seawater San Martin, F.; Kracht, W.; Vargas, T. Article ISI SCOPUS MINERALS ENGINEERING (2018)
The relevance of water recirculation in large scale mineral processing plants with a remote water supply Ihle, Christian F.; Kracht, Willy Article ISI SCOPUS JOURNAL OF CLEANER PRODUCTION (2018)
Using advanced mineral characterisation techniques to estimate grinding media consumption at laboratory scale Diaz, E.; Voisin, L.; Kracht, W.; Montenegro, V. Article ISI SCOPUS MINERALS ENGINEERING (2018)
Integrating photovoltaic solar energy and a battery energy storage system to operate a semi-autogenous grinding mill Pamparana, G.; Kracht, W.; Haas, J.; Díaz-Ferrán, G.; Palma-Behnke, R.; Román, R. Article ISI SCOPUS JOURNAL OF CLEANER PRODUCTION (2017)
Towards solar power supply for copper production in Chile: Assessment of global warming potential using a life-cycle approach Moreno-Leiva S.; Díaz-Ferrán G.; Haas J.; Telsnig T.; Díaz-Alvarado F.A.; Palma-Behnke R.; Kracht W.; Román R.; Chudinzow D.; Eltrop L. Article ISI SCOPUS JOURNAL OF CLEANER PRODUCTION (2017)
Acoustic measurement of the bubble Sauter mean diameter d32 Kracht W; Moraga C Article Minerals Engineering (2016)
Effect of surfactant type on the entrainment factor and selectivity of flotation at laboratory scale Kracht, W.; Orozco Y.; Acuna, C Article ISI SCOPUS Minerals Engineering (2016)
Indirect measurement of frother concentration based on l-CCC curves Kracht, W.; Hunt, C. Article ISI SCOPUS Minerals Engineering (2016)
Textural image classification of foams based on variographic analysis Mesa D; Kracht W; Díaz G Article Minerals Engineering (2016)
A stochastic approach for measuring bubble size distribution via image analysis Kracht, W.; Emery, X; Paredes C. Article ISI SCOPUS International Journal of Mineral Processing (2013)
Study of the local critical coalescence concentration (l-CCC) of alcohols and salts at bubble formation in two-phase systems Kracht, W.; Rebolledo H. Article ISI SCOPUS Minerals Engineering (2013)
Using Two-Point Set Statistics to Estimate the Diameter Distribution in Boolean Models with Circular Grains Emery, X; Kracht, W.; Egana A; Garrido, F Article ISI SCOPUS Mathematical Geosciences (2012)
Effect of frother on initial bubble shape and velocity Kracht, W.; Finch, JA Article ISI SCOPUS International Journal of Mineral Processing (2010)
Geometallurgical modelling of the Collahuasi flotation circuit Suazo, CJ; Kracht, W.; Alruiz, OM Article ISI SCOPUS Minerals Engineering (2010)
Influence of frothers on bubble shape and velocity close to the generation point Kracht, W.; Finch J. Article SCOPUS XXV International Mineral Processing Congress 2010, IMPC 2010 (2010)
Bubble break-up and the role of frother and salt Kracht, W.; Finch, JA Article ISI SCOPUS INTERNATIONAL JOURNAL OF MINERAL PROCESSING (2009)
Using sound to study bubble coalescence Kracht, W.; Finch, JA Article ISI SCOPUS JOURNAL OF COLLOID AND INTERFACE SCIENCE (2009)
Controlling bubble size using a grit and sleeve sparser Kracht, W., Gomez, C.O., Finch, J.A. Article MINERALS ENGINEERING (2008)
Comparing the effect of salts and frother (MIBC) on gas dispersion and froth properties Quinn, J.J., Kracht, W., Gomez, G.O., Gagnon, C., Finch, J.A. Article MINERALS ENGINEERING (2007)
Characterization and modeling of bubbles size distribution in mechanical flotation cells Vallebuona G.; Casali, A.; Kracht, W. Article ISI REVISTA DE METALURGIA (2005)
Rate constant modelling for batch flotation, as a function of gas dispersion properties Kracht, W.; Vallebuona G.; Casali, A. Article ISI SCOPUS MINERALS ENGINEERING (2005)


Workflows in geometallurgical prediction: Challenges and outlook Ortiz J.M.; Kracht, W.; Townley B.; Lois, P; Cardenas, E.; Miranda, R.; Alvarez M. ConferencePaper SCOPUS Proceedings of IAMG 2015 - 17th Annual Conference of the International Association for Mathematical Geosciences (2015)


Geo-mining-metallurgical characterization and predictive modelling: towards the future mining Brian Townley; Willy Kracht Proyecto Integration of geometallurgical characterization, process modelling, geostatistical tools, and image textural/structural analysis, to develop predictive models in extractive metallurgy and mineral processing. (2017)
Bioflotation of sulfides in seawater: evaluation of potential application of biocompo- nents in copper ore processing with seawater Willy Kracht; Christian Ihle; Tomás Vargas; Melanie Colet Proyecto Use of bacteria to biodepress pyrite in froth flotation in seawater. The project is a joint project between Universidad de Chile and the The Helmholtz Institute Freiberg for Re- source Technology. (2016)
Solar Mining Rodrigo Palma-Behnke; Willy Kracht; Roberto Román Proyecto Development of a roadmap for the integration of solar energy and mining. The project is a joint project between Universidad de Chile and the University of Stuttgart. (2015)
Development of a continuous sensor for measuring bubble size in flotation Willy Kracht Proyecto Development of a continuous sensor for measuring bubble size distribution in flotation cells based on characteristic sounds emitted by bubbles. (2012)
Study of bubble coalescence prevention in the presence of frothers by means of bub- ble acoustic emissions in flotation systems Willy Kracht Proyecto Studying, both theoretically and experimentally, bubble coalescence in presence of frothers and other agents, e.g., mineral particles and salts. (2011)


Renewable energy in copper production: A review on systems design and methodological approaches Moreno-Leiva S.; Haas J.; Junne T.; Valencia F.; Godin H.; Kracht W.; Nowak W.; Eltrop L. Review ISI SCOPUS (2020)