Application of the Circular Economy in the Mining Metallurgical Industry for the Recovery of Gold and the Production of Bricks from Tailings

Yoplac Castromonte E.; Avalo Cortez O.; Martínez Aguilar D.P.; Uza Teruya J.; Sierra Redhead K.J. · European Public and Social Innovation Review (2024) · DOI: 10.31637/epsir-2024-1085

Resumen

Introduction: Mine tailings are toxic wastes that generate environmental risks when exposed to water and oxygen. This study evaluates the use of gold tailings to recover gold and produce bricks, applying a circular economy approach. Methodology: The sample was characterized to determine the mineral species and properties. Flotation tests were then performed on the tailings. Results: Characterization of the Marañon tailings revealed high concentrations of gold in arsenopyrite, with 90% of the gold and silver in particles smaller than 74 μm. Arsenopyrite at this fine size can damage the environment due to its toxicity. Discussion: The method offers an advantage in reducing the volume of tailings by making bricks, in addition to ornamental products made with cement and sodium silicate at room temperature. Conclusions: Circular economy applied to tailings management in mining has shown environmental and economic benefits. Waste generation is reduced and valuable materials such as gold and silver are recovered. In addition, treated tailings can be reused in the manufacture of bricks without causing environmental impacts.

Instituciones: Universidad Nacional de Ingeniería