Nyrstar: Unplanned production outage at Port Pirie smelter

Regulated Information – Inside Information

Nyrstar: Unplanned production outage at Port Pirie smelter

10 June 2019 at 08.00 CEST

Nyrstar NV ("Nyrstar" or the “Company”) advises that it has had to declare force majeure under a number of its agreements, due to an unplanned stoppage of production at the Port Pirie smelter that commenced on 28 May 2019. Production is expected to resume at the end of June 2019.

The Blast Furnace was intentionally shut down in May 2019, to allow the Top Submerged Lance Furnace (the “TSL”) to re-establish an adequate stock of product TSL slag feed for the Blast Furnace, following an extended planned shutdown of the TSL in April 2019. The Blast Furnace restart was unexpectedly delayed by a steam eruption in the Refinery, and a failed Blast Furnace water jacket.

On 5 June 2019, a failure of the TSL main process gas duct, between the Waste Heat Boiler and Evaporative Gas Cooler, required a further shutdown of the TSL for remedial work. Consequently the further extended Blast Furnace outage now requires a partial dig out of the Continuous Drossing Furnace, essential for treatment of all lead output from the Blast Furnace, as it has now fully solidified. It is expected that the Blast Furnace and TSL will restart at approximately the same time at the end of June 2019.

This unplanned shutdown will have a material negative impact on production at Port Pirie and Underlying EBITDA in Q2 2019. Nyrstar has not yet fully quantified the impact and will provide further information regarding the resolution of the production outage in due course.

About Nyrstar

Nyrstar is a global multi-metals business, with a market leading position in zinc and lead, and growing positions in other base and precious metals, which are essential resources that are fuelling the rapid urbanisation and industrialisation of our changing world. Nyrstar has mining, smelting and other operations located in Europe, the Americas and Australia and employs approximately 4,100 people. Nyrstar is incorporated in Belgium and has its corporate office in Switzerland. Nyrstar is listed on Euronext Brussels under the symbol NYR. For further information please visit the Nyrstar website: www.nyrstar.com.

For further information contact:

Anthony Simms - Head of Investor Relations & Insured Risk T: +41 44 745 8157 M: +41 79 722 2152 anthony.simms@nyrstar.com Franziska Morroni - Head of Corporate Communications T: +41 44 745 8295 M: +41 79 719 2342 franziska.morroni@nyrstar.com

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