Oil Minister Adil Abdulmahdi tours the besieged Baiji refinery on Sept. 11, 2014, a day after formally taking office. (Source: Office of Adil Abdulmahdi) Iraq’s largest oil refinery still faces enormous obstacles before it can resume operations, one month after Iraqi forces regained control of the city of Baiji from insurgents led by the so-called Islamic State (IS) group.”It could take more than a year to get it operating again,” said a senior technical official at the refinery.Since the government chased IS militants from Baiji in mid November, Iraqi forces have consolidated positions in the refinery compound itself and key parts of Bai…