Abstract
The galvanic interaction between two minerals leads to redox reactions that change the surface of minerals, affecting their floatabilities. In the present work, the galvanic interaction between pyrite and arsenopyrite was studied through measurements of electrode potentials with and without electrical contact allied to contact angle between these sulfides, indicating that the interaction inhibited the pyrite oxidation and caused an increase of its contact angle. In the case of arsenopyrite, the galvanic interaction caused a decrease of about 50% on its contact angle, without interation, indicating a surface oxidation with the formation of FEOOH. Nitrogen bubbling leads to higher contact angles and lower potentials values for both minerals with and without interation between each other.
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