Estimation of energy consumption for each process in the Japanese steel industry: a process analysis

Sakamoto, Yuki; Tonooka, Yutaka; Yanagisawa, Yukihiko

doi:10.1016/s0196-8904(99)00025-4

Cited by 52 publications

(20 citation statements)

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“…using Coke Oven Gas (COG) as fuel-supply in other parts of the plant) results in better energy efficiency, but at the same time moves the industry further away from renewable alternatives. The main contributor is the blast furnace, which uses coal and generally dominates in terms of emissions and energy consumption [7].…”

Section: Introductionmentioning

confidence: 99%

“…However, constructing a detailed model of the whole blast furnace is very challenging, considering the numerous physical and chemical phenomena. Another type of model is suggested in works such as Suopajärvi and Fabritius [25], Grip et al [26], or Sakamoto et al [7] with the purpose to simulate an integrated steel plant. It is important to evaluate the effects of biofuels on the whole plant, though the most critical considerations for steel company is to ensure that the blast furnace can continue running uninterrupted and maintaining the same performance.…”

Section: Introductionmentioning

confidence: 99%

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Biomass as blast furnace injectant – Considering availability, pretreatment and deployment in the Swedish steel industry

Wang¹,

Mellin

Lövgren³

et al. 2015

Energy Conversion and Management

138

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a b s t r a c tWe have investigated and modeled the injection of biomass into blast furnaces (BF), in place of pulverized coal (PC) from fossil sources. This is the easiest way to reduce CO 2 emissions, beyond efficiencyimprovements. The considered biomass is either pelletized, torrefied or pyrolyzed. It gives us three cases where we have calculated the maximum replacement ratio for each. It was found that charcoal from pyrolysis can fully replace PC, while torrefied material and pelletized wood can replace 22.8% and 20.0% respectively, by weight.Our energy and mass balance model (MASMOD), with metallurgical sub-models for each zone, further indicates that (1) more Blast Furnace Gas (BFG) will be generated resulting in reduced fuel consumption in an integrated plant, (2) lower need of limestone can be expected, (3) lower amount of generated slag as well, and (4) reduced fuel consumption for heating the hot blast is anticipated. Overall, substantial energy savings are possible, which is one of the main findings in this paper.Due to the high usage of PC in Sweden, large amounts of biomass is required if full substitution by charcoal is pursued (6.19 TWh/y). But according to our study, it is likely available in the long term for the blast furnace designated M3 (located in Luleå).Finally, over a year with almost fully used production capacity (2008 used as reference), a 28.1% reduction in on-site emissions is possible by using charcoal. Torrefied material and wood pellets can reduce the emissions by 6.4% and 5.7% respectively. The complete replacement of PC in BF M3 can reduce 17.3% of the total emissions from the Swedish steel industry.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Biomass as blast furnace injectant – Considering availability, pretreatment and deployment in the Swedish steel industry

Wang¹,

Mellin

Lövgren³

et al. 2015

Energy Conversion and Management

138

View full text Add to dashboard Cite

show abstract

“…In this report, in order to obtain more precise estimates than currently available, the amount of CO emissions were estimated by adding some improvements based on the author's methodology (Sakamoto et al, 1999), and using the above statistics (MITI, 1995).…”

Section: Outline Of Methodology For Estimating Co Emission Of Each Prmentioning

confidence: 99%

“…For crude steel (cs) produced from these via production routes, the EFCO (kg-CO (ton-cs\)), is expressed in terms of thermal energy and CO emissions per ton of crude steel, respectively, were estimated. Regarding energy consumption for each process and speci"c energy consumption for each product, see the author's study (Sakamoto et al, 1999).…”

Section: Energy Consumption and Comentioning

confidence: 99%

Estimation of CO2 emission for each process in the Japanese steel industry: a process analysis

Sakamoto

Tonooka

2000

Int. J. Energy Res.

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“…A continuous reheating furnace [1,2] is the major process in the iron and steel industry. Sakamoto et al [3] showed that the reheating furnace consumes substantially high amount of energy. The billet is heated to a proper temperature of 1,100-1,250C.…”

Section: Introductionmentioning

confidence: 99%

A Numerical Investigation of the Temperature Uniformity of a Billet due to Thermal Radiation in a Reheating Furnace

Khoukit

Tangthieng

2016

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Abstract. In Thailand, the iron and steel industry is one of the major industries to provide raw materials to other ones. In order to heat a billet to a proper temperature, it is fed into a reheating furnace, which generates heat by the combustion of fuel from direct-fired burners. After the temperature uniformity of the billet is achieved, it will be sent to the rolling process. The major mechanism of heat transfer in the reheating furnace is the thermal radiation because of the high combustion gas temperature. The temperature distribution of a billet subjected to the thermal radiation of the enclosure surfaces in a reheating furnace is presented in this study. The 2-D steady-state heat conduction equation is numerically solved by the finite volume method together with the Gauss-seidel iterative technique. A qualitative agreement between the numerical result and the data from filed measurement is presented. The variations of the temperature uniformity of the billet with different insulation thicknesses, flame temperatures and furnace floor temperatures are investigated. The result indicates the hot spot at the middle of billet originated from the position of combustion flame. When the wall insulation thickness is decreased, the thermal radiation of combustion flame is decreased, leading to the higher degree of the temperature uniformity of the billet. In case of the lower flame temperature or the higher the floor temperature, the degree of the temperature uniformity of the billet also increases.

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Estimation of energy consumption for each process in the Japanese steel industry: a process analysis

Cited by 52 publications

References 0 publications

Biomass as blast furnace injectant – Considering availability, pretreatment and deployment in the Swedish steel industry

Biomass as blast furnace injectant – Considering availability, pretreatment and deployment in the Swedish steel industry

Estimation of CO2 emission for each process in the Japanese steel industry: a process analysis

A Numerical Investigation of the Temperature Uniformity of a Billet due to Thermal Radiation in a Reheating Furnace

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