DISTRIBUTION OF CALORIFIC VALUE BY COKE SIZE CLASS

As is known, the specificity of the layered coking process causes the development of fracturing, which determines the formation of the granulometric composition of the coke. The article presents and analyzes data on the physicochemical properties of coke of various size classes. The expediency of studying the values of the calorific value for different classes of the size of blast furnace coke has been substantiated. For this purpose, ramp coke was taken from batteries that were significantly different in size. In particular, coke oven battery I has almost twice the useful volume of coking chambers and, accordingly, the design capacity than coke oven battery II. In addition, the height of the chambers of coke oven battery I is 7000 mm, and that of coke oven battery II is 4300 mm. The above circumstances must be taken into account when evaluating the heat of combustion of various size classes of blast furnace coke. The composition of the investigated charge consisted of classic grades of coals, which are characterized by their inherent set of quality indicators. The charge for battery I was characterized by a lower burst pressure. It is shown that the value of the highest calorific value of wet quenching blast furnace coke undergoes significant changes depending on the size. Size classes less than 25 mm are characterized by maximum values of the gross calorific value, which reach 33.0 MJ/kg and more. The level of "readiness" of coke, expressed by the value of the yield of volatile substances and the actual density of the coke, significantly affects the value of the highest calorific value. Less "finished" blast furnace coke is characterized by higher values of the gross calorific value for all particle sizes. It is concluded that the value of the highest calorific value of blast furnace coke can serve as a criterion (in addition to those already available) for assessing the degree of "readiness" of blast furnace coke. Keywords: coal, coke, coke size classes, degree of readiness, heat of combustion. Corresponding author Miroshnichenko I.V., e-mail: [email protected]

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The influence of the bulk density of the coal blend on the gross calorific value of blast furnace coke

10.23939/cte2019.01.096 ◽

2019 ◽

Author(s):

Denis Miroshnichenko ◽

Igor Miroshnichenko

Keyword(s):

Blast Furnace ◽

Bulk Density ◽

Calorific Value ◽

Gross Calorific Value ◽

Coal Blend ◽

Blast Furnace Coke ◽

Furnace Coke

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The impact of coal injection into the blast furnace on the reduction of carbon dioxide emissions from the blast furnace-coke oven system

Fuel ◽

10.1016/0016-2361(93)90601-w ◽

1993 ◽

Vol 72 (5) ◽

pp. 698-699 ◽

Cited By ~ 2

Author(s):

W.P. Hutny ◽

J.T. Price ◽

J.A. MacPhee

Keyword(s):

Carbon Dioxide ◽

Blast Furnace ◽

Carbon Dioxide Emissions ◽

Coke Oven ◽

Blast Furnace Coke ◽

Coal Injection ◽

The Impact ◽

Furnace Coke

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Feasibility study on the effect of coal injection into the blast furnace on performance and emissions from the blast furnace-coke oven system

10.4095/304634 ◽

1995 ◽

Author(s):

W P Hutny ◽

J A MacPhee ◽

L Giroux

Keyword(s):

Blast Furnace ◽

Feasibility Study ◽

Coke Oven ◽

Blast Furnace Coke ◽

Coal Injection ◽

Performance And Emissions ◽

Furnace Coke

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Development of rational technological parameters for heating of a coke battery with a stamped charging of coals.

Journal of Coal Chemistry ◽

10.31081/1681-309x-2021-0-3-20-29 ◽

2021 ◽

Vol 3 (3) ◽

pp. 20-29

Author(s):

V.I. Goncharov ◽

I.I. Sikan ◽

Ya.I. Dyachuk ◽

N.V. Mukina ◽

I.V. Shulga

Keyword(s):

Blast Furnace ◽

Coke Plant ◽

Coke Oven ◽

Coke Battery ◽

Technological Parameters ◽

Heating Wall ◽

Blast Furnace Coke ◽

Start Up ◽

Coal Charge ◽

Furnace Coke

DEVELOPMENT OF RATIONAL TECHNOLOGICAL PARAMETERS FOR HEATING OF A COKE BATTERY WITH A STAMPED CHARGING OF COALS © V.I. Goncharov, I.I. Sikan, Ya.I. Dyachuk, N.V. Mukina (Coke production of PJSC «ArcelorMittal Kryvyi Rih», 50095, Dnipropetrovsk region, Kryvyi Rih, Kryvorizhstal str., 1, Ukraine), I.V. Shulga, PhD in technical sciences (State Enterprise "Ukrainian State Research Coal Chemical Institute (UHIN)", 61023, Kharkov, Vesnina st., 7, Ukraine) The article is devoted to the introduction at the PJSC «ArcelorMittal Kryvyi Rih» coke plant of a promising technology for compaction of a coal charge, which allows obtaining blast furnace coke of high mechanical and "hot" strength from charges characterized by an increased content of lean components of various stages of metamorphism. Under the present circumstances, this is of great importance for increasing the economic indicators of the production of blast furnace coke and the operation of blast furnaces. The start-up of coke oven battery No. 6, designed for the application of this technology, necessitated the determination of rational technological parameters of heating: the temperature level in the control verticals and the location of the burners for supplying coke oven gas in the vertical along the heating wall. The article presents the calculations, the results of which confirm the expediency of rationalizing the actual starting (design) distribution of burners on coke oven battery No. 6. First of all, attention is drawn to the insufficient diameters of the holes in the burners for the extreme and pre-extreme verticals. This, according to the authors, caused underheating of the head zones and resin spills, which were observed during start-up operations on the battery. The replacement of burners at the edges of the walls by large diameters, carried out by the personnel of the coke shop of the coke plant PJSC “ArcelorMittal Kryvyi Rih” and LLC “Koksokhimstanciya”, combined with the full opening of the recirculation windows in these zones, improved the heating of the charge and significantly reduced the intensity of spills. The experience gained was taken into account when locating the control devices at coke oven battery No. 5, which was put into operation later. The article also formulates recommendations for adjusting the temperature regime of coking, depending on the grade and component composition, as well as the technological properties of coal charges. Keywords: coke oven battery, stumping of coal charge, temperature in control verticals, location of burners along the length of the heating wall. Corresponding author Ya.I. Dyachuk, е-mail: [email protected]

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