Some 800 workers, including at the port San Juan de Marcona, have taken part in the indefinite strike after negotiations over a new contract broke down.
The logic is sound: If steel mills are given pollution restrictions, they will use the best possible quality iron ore to maximise the amount of steel produced relative to the energy consumed.
The move comes two weeks after India's top court said ArcelorMittal's bid for Essar Steel would become valid only if the acquirer cleared outstanding debt of Uttam Galva Steels and KSS Petron.