Nexa Resources SA said June 1 that production at its Tres Marias zinc smelter in Brazil's Minas Gerais state has returned to normal levels.
Output at the smelter was partially affected due to interruptions in the supply of raw materials resulting from a nationwide strike by truck drivers in the country.
Production at the Vazante and Morro Agudo zinc mines as well as at the Juiz de Fora smelter remained unaffected during this time.
