Payment will be made with newly issued Boliden shares, giving the seller of the shares - Votorantim - a 7 percent stake in Boliden.
The deal must be approved by an extraordinary general meeting and by the authorities before it can be completed.
"Provided that all regulatory approvals are obtained, the transaction is expected to lead to a significant increase in Boliden's production of finished metals and metals in concentrates," Boliden writes.
Before the deal, Nexa Resources is listed on the New York Stock Exchange, but Boliden has agreed to make a cash bid for the remaining shares in the company once the purchase of Votorantim's shares is complete.
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