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Modelling of the wear of grinding media in the iron ore milling

Grant number: 19/10481-2
Support type:Scholarships in Brazil - Doctorate
Effective date (Start): June 01, 2019
Effective date (End): March 31, 2021
Field of knowledge:Engineering - Mining Engineering
Principal Investigator:Homero Delboni Junior
Grantee:Dimas José Neto
Home Institution: Escola Politécnica (EP). Universidade de São Paulo (USP). São Paulo , SP, Brazil
Associated research grant:17/50343-2 - Institutional development plan in the area of digital transformation: advanced manufacturing and smart and sustainable cities (PDIp), AP.PDIP

Abstract

The wear of grinding media figures between the major expenses in the mineral processing. Although the methodology to quantify the wear rate is already established, the individual contribution of the process variables and the ore itself is not yet fully understood, because of the great number of variables and their interaction. A mathematical model to predict the consumption of grinding media in the processing of iron ore is interesting to the mineral industry, so as to reduce costs and to allow improvement opportunities in the process. This project aims to construct such a model, considering operational variables, ore characteristics (mineralogy/texture), slurry rheology and metallurgical features of the steel balls. From the Archard's Equation, the model will couple multivariable regression of the parameters that characterize the tribossystem to the Discrete Elements Modelling (DEM) of the multiple contacts inside the balls charge. The data to the model construction and validation will be obtained from marked ball wear tests in the IPT's pilot grinding plant. (AU)