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Três Marias

Três Marias



Principal Refined Products

Metallic zinc and zinc oxide

Plant Capacity

192.2 ktpy







The Três Marias smelter is located in the municipality of Três Marias in the state of Minas Gerais, Brazil, wholly owned by Nexa Brazil, 250 km from the Morro Agudo mine and 253 km from the Vazante mine and is accessible by road.


Our Três Marias smelter, which is wholly owned by Nexa Brazil, is located in Brazil and began operating in 1969. Três Marias processes zinc silicate concentrate from our Vazante mine and zinc sulfide concentrate from our Morro Agudo mine and uses Roast-Leach-Electrowinning technology. With a nominal production capacity of 192.2 thousand tonnes of refined metal per year, Três Marias produced 182.3 thousand tonnes of zinc metal and oxide in 2023 and 189.9 thousand tonnes in 2022. In 2023, 73.3% of the zinc contained in raw materials used by Três Marias was sourced from our mining operations in Brazil and Peru and 26.7% was purchased from third parties or obtained from secondary feed materials.


2023 2022 2021
Production kt 182.3 189.9 198.4
Zinc Recovery % 90.1 91.6 94.7
Metallic zinc Sales kt 147.1 151.8 163.7
Zinc oxide Sales kt 33.9 40.3 40.9
Conversion cost US$/lb 0.26 0.19 0.12
Cash Cost, net of by-product credits US$/t 2,546.9 3,116.0 2,455.4
Cash Cost, net of by-product credits US$/lb 1.16 1.41 1.11
CAPEX US$ mm 22.2 42.1 17.7