Blast Furnace Operation Improvement With Simultaneous Injection of Natural Gas and PCI
(Room 405)
06 May 19
3:30 PM
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4:00 PM
Theoretical analysis shows that high intensity of blast furnace operation and minimum coke consumption could be simultaneously achieved. With the introduction of pulverized coal injection (PCI), two contradicting factors are observed: reduction in gas flow and the upper and bottom pressure drop, and reduction in voidage on slag forming zone. These determine the extreme relationship between PCI and blast furnace productivity. It is shown that an increase in the ratio between PCI and natural gas (simultaneous injection) reduces coke and total carbon rate and furnace productivity. The highest furnace intensity is observed with this ratio in the range of 2-2.5. Results are implemented at NLMK in Russia.