Effectiveness of coke fines in blast-furnace smelting

Логачев, Г. Н.; Pishnograev, S. N.; Gostenin, V. A.; Chevychelov, A. V.; Gridasov, V. P.

doi:10.3103/s0967091212020131

Cited by 3 publications

(2 citation statements)

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“…Based on blast furnace operational experiences, Logachov et al 45 also observed that increase in the nut coke concentration beyond certain optimum concentration could lead to poor smelting rate, improper hearth operation and lower furnace productivity.…”

Section: Nut Coke In Lower Part Of the Furnacementioning

confidence: 99%

“…43,44 After blast furnace trials with nut coke at OAO MMK, Magnitogorsk, Russia, it was concluded that with better regular coke quality, high nut coke utilisation and good replacement ratio is possible. 45 In another study to compare the qualities between dry and wet quenched coke nuts, it was found that the qualities like hot and cold strength, and its reactivity were better with the dry quenched coke. 46 For adequate nut coke charging in mixture with ferrous burden, its interaction co-relation with respect to the coke physical and chemical quality are important.…”

Section: Requirement Of Correlational Research With Nut Cokementioning

confidence: 99%

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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: Nut Coke In Lower Part Of the Furnacementioning

confidence: 99%

Section: Requirement Of Correlational Research With Nut Cokementioning

confidence: 99%

A review on nut coke utilisation in the ironmaking blast furnaces

Gavel

2016

Materials Science and Technology

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Model study of central coke charging on ironmaking blast furnace performance: Effects of charing pattern and nut coke

Shen

2020

Powder Technology

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Attempts to replace nut coke with semi-coke for blast furnace ironmaking

Meng

et al. 2021

Metall. Res. Technol.

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Low coke rate for blast furnace operation has been required in response to the rising cost of coking coals. To extend the utilisation of coal resources, semi-coke has been introduced to blast furnace ironmaking process in recent years, however, there are still many issues unclear about the effect of semi-coke on ironmaking process. In this study, the possibilities of using semi-coke as alternative fuel for nut coke were studied. The characteristics of semi-coke including mechanical strength, high-temperature strength/reactivity, carbon gasification as well as direct reduction were studied and compared with small size metallurgical cokes (nut cokes). The results showed that semi-coke has higher CRI values, especially at higher temperatures and in a mix-charging pattern. Semi-coke was found to have a higher gasification reaction rate and depleted at lower temperatures. The reduction results showed that with participating of semi-coke the reaction starts at lower temperatures. In addition, the study suggested that semi-coke exhibits the advantages of low ash and sulphur contents, although it has lower mechanical strength, it would protect the lump coke by shifting the carbon gasification to itself, therefore, mixing semi-coke would benefit the blast furnace operation and lower the coke rate.

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Effectiveness of coke fines in blast-furnace smelting

Cited by 3 publications

References 1 publication

A review on nut coke utilisation in the ironmaking blast furnaces

A review on nut coke utilisation in the ironmaking blast furnaces

Model study of central coke charging on ironmaking blast furnace performance: Effects of charing pattern and nut coke

Attempts to replace nut coke with semi-coke for blast furnace ironmaking

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