DUBAI (Reuters) -Iran will continue to enrich uranium to 20% purity even after sanctions on it are lifted and a 2015 nuclear deal with world powers is revived, Iranian news agencies quoted the country’s nuclear chief as saying on Friday. “(Uranium) enrichment … continues with a maximum ceiling of 60%, which led Westerners to rush to negotiations, and it will continue with the lifting of sanctions by both 20% and 5%,” the head of Iran’s Atomic Energy Organization, Mohammad Eslami, was quoted by the semi-official news agency Fars as saying. The 2015 deal restricts the purity to which Iran can …