Quality comparison of coke nuts

Sibagatulin, S. K.; Харченко, А. С.; Teplykh, E. O.; Stepanov, E. N.; Mezin, D. A.; Fetisov, V. B.

doi:10.3103/s1068364x12020044

Cited by 7 publications

(2 citation statements)

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“…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. This will give an operational guidelines to the blast furnace operator for the utilisation of different nut coke concentration in mixture of ferrous burden.…”

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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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: 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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“…Involvement of the coke nut (10 -25 mm) and coke faction (25 -40 mm) in blast furnaces process is one of the ways to reduce the specific consumption of skip coke [5 -9]. The advantages of this operation are the following [10]: − presence of carbon; − increased cold strength in comparison with the skip coke; − the higher equivalent size on surface than for the sinter and pellets one.…”

Section: Introductionmentioning

confidence: 99%

Neural Network Modeling of Coefficient of Burden Resistance to the Gas Movement in the Lower Part of the Blast Furnace in Conditions of Operation with Coke Nut

Сибагатуллин

Харченко

Потапова

2016

MSF

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A mathematical model based on the use of artificial neural networks for forecast of resistance coefficient of burden to the gas at the bottom of the blast furnace with using of coke nut by processing of data array for the OJSC "MMK" blast furnaces (capacity of 1370 m3), equipped with a chute-type bell-less charging device has been created. This test has shown the adequacy of the model to real data. Influence of such factors as characteristics of blast (oxygen content, temperature, natural gas and water steam consumption), iron ore (raw material consumption per time unit, FeO, MgO, Al2O3 content, fraction, basicity), coke (wearability (M10), impact strength (M25), coke strength reactivity (CSR), coke reactivity index (CRI)) on gas dynamics variation at the lower part of the black furnace have been determined. Average relative prediction error does not exceed 0.28 %, the maximum of the sample is 2.82 %. The oxygen content in the blast has the biggest effect on the burden resistance coefficient. When oxygen concentration is more than 25.2 %, the increase of natural gas consumption improves gas-dynamic conditions in the lower part of blast furnace. With the decrease of oxygen content in the blast, the influence of natural gas consumption on coefficient of burden resistance varies in the opposite direction. The reduction of coke wearability (M10) by 0.05 % abs. or the increase of coke strength reactivity (CSR) by 0.14 % abs. has compensated negative effect of coke nut (consumption 4 kg/t of iron) on blast furnace operation.

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