Nexa Resources S.A. – Vazante Polymetallic Operations, Project #3245 Technical Report NI 43-101
| Company | Nexa Resources S.A. |
| Date | 2021-01-29 |
| Region | Minas Gerais, Brazil |
| Commodities | Zinc, Lead, Silver |
| Throughput | 4,400 tpd |
| Annual Production | 350,000-370,000 tpa Zn Conc, 4,000-5,000 tpa Pb Conc |
| Status | Operating |
Executive Summary
The Vazante Operation processing facilities have a nominal design processing capacity of approximately 4,400 tpd or 1.6 Mtpa at 96% utilization. The operation produces approximately 350,000 tonnes per annum (tpa) to 370,000 tpa of zinc concentrate and approximately 4,000 tpa to 5,000 tpa of lead concentrate that contains small amounts of silver. The facility consists of two adjacent plants, Plant C and Plant W, that are interconnected at various points. In 2020, the Vazante Operation processed 1.62 Mt at an averaged head grade of 10.4% Zn and 0.36% Pb.
Processing at the Vazante Operation comprises conventional crushing, grinding, flotation, concentrate dewatering, and tailings disposal. The main differences between the two plants is that Plant W incorporates a sulphide flotation stage for the recovery of a lead–silver concentrate. Both plants include crushing, grinding, and zinc flotation. Combined Plant W and Plant C tailings are thickened and filtered prior to disposal in the Pilha Garrote dry stack TSF (DSTF).
Zinc concentrate produced at the Vazante Operation is sent to Nexa’s Três Marias zinc smelter approximately 250 km from Vazante. Lead concentrate is loaded into bulk bags at the Vazante Operation and transported approximately 900 km to the Port of Itaguai for shipment. The operation utilizes a combination of jaw crushers, cone crushers, ball mills, and various flotation cells to recover zinc, lead, and silver from calamine, willemite, and sulphide ores.
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Report Date: 2021-01-29
Region: Minas Gerais, Brazil
Project Status: Operating
Commodity: Zinc, Lead, Silver
Throughput: 4,400 tpd
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