Coating pellets and hot-charging DRI

摘要

The process does add cost for water treatment, however. The limestone or cement gets into the water system, Ogden explains. Reformer life shortens because of the higher temperatures; the tubes weren't designed for higher temperatures. Both Midrex and Hylsa are testing hot-charging of the DRI into the EAFs. The higher DRI temperature would allow operators to speed up heats and save on energy. A mill that charges 20-percent DRI by hot-charging could increase productivity by 4 percent and save 28 kilowatt hours per ton, Midrex estimates.