Improving the use of coke-oven gas in blast-furnace smelting

Kovalenko, P. E.; Chebotarev, Andrey P.; Pashinskii, V. F.; Zamuruev, V. M.; Tovarovskii, I. G.; Boiko, N. G.; Plevako, V. S.; Trunov, B. S.

doi:10.1007/bf00751932

Cited by 4 publications

(3 citation statements)

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“…This composition of COG which is rich with hydrogen has attracting much attention in the recent years for its utilization in the reduction processes . The injection of COG in BF is already put in practice . The application of COG for production of DRI in integrated steel plant is still under discussion and evaluation .…”

Section: Introductionmentioning

confidence: 99%

Reduction Behavior of Iron Ore Pellets with Simulated Coke Oven Gas and Natural Gas

Mousa

Babich

Senk

2013

steel research int.

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Recently a special attention is being paid on the combination of different ironmaking technologies in the integrated steel plant to maximize the efficiency of the overall process. The utilization of coke oven gas for production of direct reduced iron (DRI) in the integrated steelmaking route is still under evaluation and discussion. In this study, iron ore pellets were isothermally reduced with simulated original and reformed coke oven gas (RCOG) at 700-9808C. The results were compared with those obtained by the reduction of pellets with the original and reformed natural gas (RNG). The highest reduction degree was obtained for the pellets reduced with RCOG while the lowest reduction degree was exhibited by original natural gas. On the other hand the rate of reduction with original coke oven gas was sharply increased at temperature of about 9008C to become higher than that of RNG. A slow down phenomenon appeared at the later stage of reduction due to the intensive carbon deposition. The soot formation increased as CH 4 content and/or the temperature of reducing gas increased. Reflected light microscope, scanning electron microscope with EDX, and high performance X-ray diffraction analysis were used to estimate the reduction kinetics and mechanism.

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Section: Introductionmentioning

confidence: 99%

Reduction Behavior of Iron Ore Pellets with Simulated Coke Oven Gas and Natural Gas

Mousa

Babich

Senk

2013

steel research int.

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“…16) Although the injection of COG into the blast furnace is practiced in some countries with different injection rate from about 30 to 280 m 3 /tHM but its effect for example on the sinter reducibility is not clear. 9,11,18,19) Furthermore, it was reported that the maximum level of COG injection at the blast furnace tuyere is thought to be 0.1 ton COG/t hot metal according to the thermochemical conditions while the replacement ratio is 0.98 ton of coke/t of COG.…”

Section: Introductionmentioning

confidence: 99%

Enhancement of Iron Ore Sinter Reducibility through Coke Oven Gas Injection into the Modern Blast Furnace

2013

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Energy network within the integrated steel works should be used more efficiency to reduce the energy consumptions and CO2 emissions. The injection of free resources of coke oven gas (COG), which is rich with hydrogen, into the modern blast furnace is one of such measures. In order to clarify the effect of COG injection on the reduction processes in the blast furnace; iron ore sinter was isothermally and nonisothermally reduced with different gas compositions at different temperature. The gas compositions were selected to simulate the conditions of middle (150 m 3 /tHM) and intensive (300 m 3 /tHM) injection of COG into the blast furnace. The results were compared to that obtained under typical blast furnace conditions without COG injection. The isothermal reduction at 900-1 200°C indicated the enhancement of the reduction rate as COG injection increased. The non-isothermal reduction indicated the efficiency of intensive injection of COG in decreasing the direct reduction from 50% to only 5% at 1 200°C. Reflected light microscopy, scanning electron microscopy and X-ray techniques were used to characterize the microstructure and the developed phases in the origin and reduced sinter. The rate controlling mechanism of sinter under different conditions was predicted from the correlation between apparent activation energy calculations and microstructure examination.KEY WORDS: integrated steel plant; COG; hydrogen; CO2 emissions and gaseous reduction.

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“…This improves the combustion in the tuyere hearth, activate coke column, and increase gases utilization in the furnace. The injection of COG into the BF is practiced in some countries with different injection rates from about 30 to 280 m 3 /tHM [120,121]. It was reported that the maximum level of COG injection into the BF is 100 kg COG/tHM according to the thermochemical conditions while the replacement ratio is 0.98 ton of coke/t of COG [122].…”

Section: Type Of Gas H2mentioning

confidence: 99%

Modern blast furnace ironmaking technology: potentials to meet the demand of high hot metal production and lower energy consumption

Mousa

2019

Metall Mater Eng

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Iron and steel making is one of the most intense energy consuming in the industrial sectors. The intensive utilization of fossil carbon in the ironmaking blast furnace (BF) is related directly to CO2 emission and global warming. Lowering the energy consumption and CO2 emission from BF comes on the top priorities from both economic and environmental aspects. The BF has undergone tremendous modifications and development to increase production and improve the overall efficiency. Both technological development and scientific research drive one another to reach optimum operation conditions, which are very close to the ideal conditions; however, further development is still required to meet the stringent environmental regulations. The present article provides a comprehensive review of recent research and development which were carried out in modern blast furnace to increase the productivity meanwhile reduce the energy consumption and CO2 emission to meet the demand of steel market and the environmental protection. The recent technological and metallurgical improvements in the BF are intensively discussed including: (i) modifications of BF design, top charging and measuring system, (ii) upgrading of conventional top charging burden and alternative agglomerates, (iii) developing of tuyeres injection system and injected materials, and (iv) potentials of waste heat recovery and usage. These topics are reviewed and discussed in some details to elucidate the potential of recent progress in BF technology in saving the energy consumption and lowering CO2 emission. In this paper, the major research and development which have been carried out in ironmaking BF technology are reviewed with an overview of the future prospects.

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Improving the use of coke-oven gas in blast-furnace smelting

Cited by 4 publications

References 0 publications

Reduction Behavior of Iron Ore Pellets with Simulated Coke Oven Gas and Natural Gas

Reduction Behavior of Iron Ore Pellets with Simulated Coke Oven Gas and Natural Gas

Enhancement of Iron Ore Sinter Reducibility through Coke Oven Gas Injection into the Modern Blast Furnace

Modern blast furnace ironmaking technology: potentials to meet the demand of high hot metal production and lower energy consumption

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