Using coke fines in the blast furnaces at OAO MMK

Pishnograev, S. N.; Chevychelov, A. V.; Gostenin, V. A.; Shtafienko, N. S.; Gridasov, V. P.

doi:10.3103/s0967091209100088

Cited by 3 publications

(1 citation statement)

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“…In recent past, it is discovered that small amount of nut coke addition in mixture with ferrous burden contributes to better gas permeability, enhanced reduction kinetics, lower Thermal Reserve Zone (TRZ) temperature and good softening melting properties of the ferrous burden. [1][2][3][4] The factors which are known to restrict the higher usage of nut coke in the blast furnace, are: (1) Regular coke layer thickness (minimum coke layer thickness) as the nut coke are charged as the replacement of regular coke, the regular coke layer thickness diminishes, and (2) Improper hearth permeability due to the presence of fine unconsumed coke and coal fines in the hearth. Its usage varies from furnace to furnace and region to region in the range of 2-23 wt-%.…”

Section: Introductionmentioning

confidence: 99%

A review on nut coke utilisation in the ironmaking blast furnaces

Gavel

2016

Materials Science and Technology

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In the ironmaking blast furnaces, nut coke (10-40 mm; 2-23 wt-%) is charged together with the ferrous burden. A systematic review is performed to understand the effects of nut coke use on the permeability, thermal reserve zone (TRZ), reduction kinetics and softening & melting behaviour. State of the art techniques for enhancing reactivity and to lower TRZ temperature are discussed. To utilise nut coke effectively, need of correlational research is expressed on its behaviour with different burden chemistry, carbon ordering, ash content and distribution style. Challenges for higher nut coke utilisation like decrease in regular coke layer thickness and unconsumed fines in lower part of the furnace are pointed out. The scope of further research is marked via this review.

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Section: Introductionmentioning

confidence: 99%