Material and energy flows of the iron and steel industry: Status quo, challenges and perspectives

Sun, Wenqiang; Wang, Qiang; Zhou, Yue; Wu, Jianzhong

doi:10.1016/j.apenergy.2020.114946

Cited by 187 publications

(54 citation statements)

References 109 publications

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“…The proposed new design of the furnace door leads to an around 50% decrease in the volumetric flow of air penetrating into the furnace, which represents a substantial change in the furnace operation. The resulting fuel saving rate can be partly calculated using Equations 7and (8). Additional fuel savings, resulting from the shorter charge melting time, must be estimated experimentally case by case.…”

Section: Resultsmentioning

confidence: 99%

“…Energy efficiency can help reduce the reliance on imports of fossil fuels, thereby bolstering energy security in the short-as well as long-term in a cost-effective way [3,4]. Currently, the metallurgical industry is one of the largest emitters of pollutants [5][6][7][8]. One of the possibilities of reducing the release of emissions is to increase the efficiency of combustion units, which leads to a decrease in fuel consumption [9].…”

Section: Introductionmentioning

confidence: 99%

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Influence of Air Infiltration on Combustion Process Changes in a Rotary Tilting Furnace

et al. 2020

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Air infiltration into the combustion chambers of industrial furnaces is an unwanted phenomenon causing loss of thermal efficiency, fuel consumption increase, and the subsequent increase in operating costs. In this study, a novel design for a rotary tilting furnace door with improved construction features is proposed and tested experimentally in a laboratory-scale furnace, aimed at air infiltration rate reduction by decreasing the gap width between the static furnace door and the rotating body. Temperatures in the combustion chamber and oxygen content in the dry flue gas were measured to document changes in the combustion process with the varying gap width. Volumetric flow values of infiltrating air calculated based on measured data agree well with results of numerical simulations performed in ANSYS and with the reference calculation procedure used in relevant literature. An achievable air infiltration reduction of up to 50% translates into fuel savings of around 1.79 to 12% of total natural gas consumption of the laboratory-scale furnace. The average natural gas consumption increase of around 1.6% due to air infiltration into industrial-scale furnaces can thus likewise be halved, representing fuel savings of almost 0.3 m3 per ton of charge.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Influence of Air Infiltration on Combustion Process Changes in a Rotary Tilting Furnace

et al. 2020

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“…Also, ex and h are the specific exergy and enthalpy, respectively. Other terms are calculated from the equations (8) to (11) [36]:…”

Section: Methodsmentioning

confidence: 99%

Energy and Exergy Analyses of a Solar-based Multi-generation Energy Plant Integrated with Heat Recovery System and Thermal Energy Storage

Sadeghi¹,

Ghandehariun²,

Rezaie³

2020

Preprint

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An innovative multigeneration energy system driven by solar energy is proposed in this paper. The integrated model produces electricity, hydrogen, oxygen, and steam for heating purposes. The energy system comprises a pressurized cavity-based solar power tower, latent thermal energy storage (TES) unit, unfired gas turbine (GT) unit, regenerative steam Rankine cycle (SRC), copper-chlorine (Cu-Cl) thermochemical cycle, and heat recovery units. By utilization of a high-temperature ternary eutectic phase change material (PCM), a dynamic model is developed to deal with the intermittency of solar energy. Using energy and exergy approaches, the proposed system is investigated to assess exergy destruction rates and the overall system performance. A parametric study is performed to investigate the influence of design parameters such as the number of heliostats, the pressure ratio of GT, and temperatures of reactions on the system performance. The results showed that the energy system produces electricity, steam, hydrogen, and oxygen at a rate of 41.9 MW, 12.6 kg/s, 0.19 kg/s, and 0.76 kg/s, respectively. Energy and exergy efficiencies of the integrated system are found to be 49.9%, and 44.9%, respectively.

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“…Pure oxygen is used in industry, medical, space, and marine applications [7]. It is currently used in respiratory devices in hospitals, life support in the space or underwater conditions, and even in industry to produce steel from iron ore [7,8]. Additionally, hydrogen which is a carbon-free energy carrier with high energy density can be of great use for energy management purposes [9].…”

Section: Introductionmentioning

confidence: 99%

Energy and exergy analyses of a solar-based multi-generation energy plant integrated with heat recovery and thermal energy storage systems

Sadeghi

Ghandehariun

Rezaie

2021

Applied Thermal Engineering

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An innovative multigeneration energy system driven by solar energy is proposed in this paper. The integrated model produces electricity, hydrogen, oxygen, and steam for heating purposes. The energy system comprises of pressurized cavity based solar power tower, latent thermal energy storage (TES) unit, unfired gas turbine (GT) unit, regenerative steam Rankine cycle (SRC), copper-chlorine (Cu-Cl) thermochemical cycle, and heat recovery units. By utilization of a high temperature ternary eutectic phase change material (PCM), a dynamic model is developed to deal with the intermittency of the solar energy. Using energy and exergy approaches, the proposed system is investigated to assess exergy destruction rates and the overall system performance. A parametric study is performed to investigate the influence of design parameters such as number of heliostats, pressure ratio of GT, and temperatures of reactions on the system performance. The results showed that the energy system produces electricity, steam, hydrogen, and oxygen at a rate of 41.9 MW, 12.6 kg/s, 0.19 kg/s, and 0.76 kg/s, respectively. Energy and exergy efficiencies of the integrated system are found to be 49.9%, and 44.9%, respectively.

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Material and energy flows of the iron and steel industry: Status quo, challenges and perspectives

Cited by 187 publications

References 109 publications

Influence of Air Infiltration on Combustion Process Changes in a Rotary Tilting Furnace

Influence of Air Infiltration on Combustion Process Changes in a Rotary Tilting Furnace

Energy and Exergy Analyses of a Solar-based Multi-generation Energy Plant Integrated with Heat Recovery System and Thermal Energy Storage

Energy and exergy analyses of a solar-based multi-generation energy plant integrated with heat recovery and thermal energy storage systems

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