Abstract
This chapter reviews the low carbon cokemaking and blast furnace (BF) ironmaking technologies in Japan. As cokemaking technology, (1) the coal pretreatment technologies (CMC (coal moisture control), DAPS (Dry-cleaned and Agglomerated Pre-compaction System), and SCOPE21 (super coke oven for productivity and environment enhancement toward the 21st century)), (2) waste plastic recycling in coke oven and (3) heat recovery using CDQ (coke dry quenching) are reviewed in detail. As BF ironmaking technology, technologies for low RAR operation of BF are reviewed including (1) improvement of heat balance, (2) improvement of shaft efficiency, (3) control of W-point (wustite-iron equilibrium) (reactive coke agglomerate, ferro-coke, highly reactive coke), (4) stable BF operation, (5) hydrogen reduction (natural gas injection and COURSE50 project), and (6) waste plastic injection. Many low carbon ironmaking technologies have been developed and commercialized in Japan. The development of new low carbon ironmaking technologies based on Japanese many years’ efforts and experience is expected.
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