Mining energy consumption as a function of ore grade decline: the case of lead and zinc

Magdalena, R. ; Valero, A. (Universidad de Zaragoza) ; Palacios, J. L. ; Valero, A. (Universidad de Zaragoza)

Resumen: Demand for raw materials is increasing exponentially. To satisfy that demand, more minerals need to be mined from the Earth’s crust. As a result, minerals are being exhausted, and ore grades decline. Lower ore grade mines also mean more energy, which in turn entails fossil fuel emissions and more climate change. This paper estimates the specific energy for the beneficiation process of metals lead and zinc as case studies. The evaluation is performed with specialized software, HSC Chemistry which assesses the specific energy for every stage: comminution, flotation, and refining. Different scenarios have been established to simulate the behavior of a mine when it approaches depletion. Preliminary results show that energy consumption for lead would increase by five times when compared to the current situation if ore grades decrease until the level of tailings, while for zinc by almost two.

Idioma: Inglés

DOI: 10.46873/2300-3960.1060

Año: 2021

Publicado en: Journal of Sustainable Mining 20, 2 (2021), 109-121
ISSN: 2543-4950

Factor impacto CITESCORE: 6.4 - Environmental Science (Q1) - Energy (Q1) - Earth and Planetary Sciences (Q1)

Factor impacto SCIMAGO: 0.829 - Environmental Engineering (Q1) - Renewable Energy, Sustainability and the Environment (Q1) - Pollution (Q1) - Geology (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/ENE2017-85224-R

Tipo y forma: Article (Published version)

Área (Departamento): Área Máquinas y Motores Térmi. (Dpto. Ingeniería Mecánica)