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Other financial instruments (Details 1) - USD ($)
$ in Thousands
Dec. 31, 2024
Dec. 31, 2023
Dec. 31, 2022
IfrsStatementLineItems [Line Items]      
Fair value $ (1,484) $ 2,600 $ 2,575
Hedging Programs For Mismatches Of Quotation Periods [Member]      
IfrsStatementLineItems [Line Items]      
Fair value 1,449 (3,175)  
Hedging Programs For Mismatches Of Quotation Periods [Member] | Zinc Forward [Member]      
IfrsStatementLineItems [Line Items]      
Nominal 232,717 209,951  
Fair value 1,449 (3,175)  
Hedging Programs For Sales Of Zinc At Fixed Price [Member]      
IfrsStatementLineItems [Line Items]      
Fair value 203 1,026  
Hedging Programs For Sales Of Zinc At Fixed Price [Member] | Zinc Forward [Member]      
IfrsStatementLineItems [Line Items]      
Nominal 2,584 7,233  
Fair value 203 1,026  
Hedging Programs For Inflation Risks [Member]      
IfrsStatementLineItems [Line Items]      
Fair value (168) (451)  
Hedging Programs For Inflation Risks [Member] | Brazilian Inflation Versus Brazilian Interbank Interest Rate Swap [Member]      
IfrsStatementLineItems [Line Items]      
Nominal 100,000 100,000  
Fair value (168) (451)  
Hedging Of Changes In Foreign Exchange Rates [Member]      
IfrsStatementLineItems [Line Items]      
Fair value $ 1,484 $ (2,600)