Global iron ore prices have bounced 37% in 2019, stimulating iron ore exports in Iran which is in conflict with government’s policy to control the domestic price of steel! So the only way is to add new tariffs on iron ore exports, be sure of the iron ore supply for Iranian steel mills.
It seems that the 30% new tariffs on iron ore exports (fines, concentrate, pellets) will be imposed by early next week. Moreover new tariffs will be imposed on copper ore or concentrate, lead, zinc, and Manganese exports.