1987年世界直接还原铁的产量已增长到13.66百万吨(见表1～2),其中以气基直接还原为主要方法生产的还原铁为12.50百万吨,占总产量的92％,而以煤基直接还原设备生产的还原铁为1.16百万吨,比1986年减少了2百万吨。据报道,1987年Midrex直接还原设备生产的还原铁占全世界直接还原铁总产量的50％以上。 The world DRI production in 1987 has increased to 13.66 million tonnes (see Tables 1-2), of which 12.50 million tonnes of reduced iron is produced by direct gas-based direct reduction, accounting for 92% of the total output, while The reduction of iron produced by coal-based direct reduction plants was 1.16 million tons, a decrease of 2 million tons over 1986. It was reported that reduced iron produced by Midrex direct reduction plants in 1987 accounted for more than 50% of the total direct reduced iron production in the world.