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Open AccessArticle

A Study of the Effect of Medium Viscosity on Breakage Parameters for Wet Grinding

1
Facultad de Ingeniería, Universidad de Antioquia, Calle 70 # 52-21, 050010 Medellin, Colombia
2
Instituto de Minerales CIMEX, Universidad Nacional de Colombia, Carrera 65 #63-20, 050010 Medellin, Colombia
3
Escuela Politécnica de Mieres, Universidad de Oviedo, Calle Gonzalo Gutiérrez Quirós, s/n 33600 Mieres, Spain
*
Author to whom correspondence should be addressed.
Symmetry 2019, 11(10), 1202; https://doi.org/10.3390/sym11101202
Received: 24 July 2019 / Revised: 17 September 2019 / Accepted: 19 September 2019 / Published: 25 September 2019
(This article belongs to the Special Issue Symmetry in Mechanical Engineering)
The rheological behavior of mineral slurries shows the level of interaction or aggregation among particles, being a process control variable in processes such as slurry transportation, dehydration, and wet grinding systems. With the aim to analyze the effect of medium viscosity in wet grinding, a series of monosize grinding ball mill tests were performed to determine breakage parameters, according to the generally accepted kinetic approach of grinding processes. A rheological modifier (polyacrylamide, PAM) was used to modify solutions viscosity. A model was proposed by means of dimensional analysis (Buckingham’s Pi theorem) in order to determine the behavior of the specific breakage rate (Sj) for a ball grinding process in terms of the rheology of the system. In addition to this, a linear adjustment was established for the relationship between specific breakage rates with and without PAM addition, based on the reduced viscosity, μr. Furthermore, within a certain interval of viscosity, it was proved that an increment of viscosity can increase the specific breakage rate, and consequently the grinding degree. View Full-Text
Keywords: grinding; rheology; breakage parameters; relative viscosity grinding; rheology; breakage parameters; relative viscosity
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MDPI and ACS Style

Osorio, A.M.; Bustamante, M.O.; Restrepo, G.M.; M. López, M.M.; Menéndez-Aguado, J.M. A Study of the Effect of Medium Viscosity on Breakage Parameters for Wet Grinding. Symmetry 2019, 11, 1202.

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