Foamy slag practice to enhance the energy efficiency of electric arc furnace: An industrial scale validation

Agnihotri, Ankur; Singh, Prince Kumar; Singh, Dinesh; Gupta, Mukesh

doi:10.1016/j.matpr.2021.01.770

Cited by 12 publications

(7 citation statements)

References 3 publications

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“…[23] The phenomenon of excessive energy consumption in the refining process can be significantly improved by producing foamy slag for submerged arc heating. [24][25][26] The generation of foamy slag depends on two key conditions: suitable bubble generation and storage of slag and a good gas source. [20] Hu implemented strategies to reduce refining time, maximize argon bottom blowing, and determine temperatures and compositions of molten steel for various steel grades at the ladle furnace station, resulting in a 6.8 kW t À1 reduction in power consumption.…”

Section: Doi: 101002/srin202300815mentioning

confidence: 99%

Effect of Argon Flow Rate on Power Consumption of a 120‐t Ladle Furnace

Song,

Zhang,

Yin

et al. 2024

steel research int.

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To improve the phenomenon of serious power consumption of a ladle furnace, the impact of argon flow rate on power consumption in the refining process is investigated through theoretical calculations based on the principle of alternating current measurement using Rogowski coil and integrator circuit. The study divides the power supply phase into four distinct flow rate regions in a single furnace of DH36 steel, a low‐alloy, high‐strength ship plate steel commonly used in shipbuilding and offshore platforms. The analysis of active power, current, and voltage trends, along with average power consumption per second at each flow rate region, reveals a potential for efficient reduction in power consumption. Additionally, experiments with different argon flow rates (300, 400, and 500 NL min−1) during the power supply stages of multifurnace argon tests of AB/A steel show improvements in desulfurization rate, heating rate, processing time, and power consumption per ton of steel heated by 1 °C and power consumption per ton of steel per second.

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Section: Doi: 101002/srin202300815mentioning

confidence: 99%

Effect of Argon Flow Rate on Power Consumption of a 120‐t Ladle Furnace

Song,

Zhang,

Yin

et al. 2024

steel research int.

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“…40 Industrial scale change, structural adjustment and industrial upgrading all have great significance for improving energy efficiency, realizing energy conservation and emission reduction, and regional economic development. 41,42 In conclusion, there are certain differences in the verdicts about the impact of environmental regulations on energy efficiency. Therefore, further verification of the relationship between the two has certain significance for solving the conflict between the environment and economy in China.…”

Section: Literature Reviewmentioning

confidence: 99%

Section: Literature Reviewmentioning

confidence: 99%

The impact of eco-environmental regulation on green energy efficiency in China - Based on spatial economic analysis

2022

Energy & Environment

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To figure out at what extent of China's investment in energy technology in recent years has helped economic growth and improved the environment. From the basic theory of environmental regulation’s influence on energy consumption efficiency, this study uses the super-efficiency slack base model to measure the green energy efficiency of 30 provinces in China from 2010 to 2019, and uses the kernel density function to analyze evolution trajectory. Then, the spatial Dubin model is used to test the influence of some important economic variables. The results of value show that although China's green energy efficiency improved significantly from 2010 to 2019, the overall performance was lacking. However, the overall efficiency value was significantly improved during the study period. Moreover, the efficiency value was closely related to the performance of economic development. From the dynamic trajectory perspective, efficiency values of all years show the type of "two peaks".Altough the width between the two peaks did not change noticeably, but the efficiency still had a significantly improved. In addition, according to the results of spatial economic regression analysis, eco-environmental constraints, foreign direct investment, and industrial agglomeration were not conducive to the efficiency value, while industrial structure and manufacturing enterprise scale had positive effects. In addition, the influence effects had obvious spatial phenomena. Therefore, for the Chinese government, enterprises and society, the next step is not only to vigorously exploit energy-saving and emission reduction technologies to improve energy consumption efficiency but also to establish reasonable environmental regulation policies to push enterprises to produce in a cleaner way. Additionally, a reasonable regional development plan should be established to promote the rational distribution and flow of the energy industry across different places. This paper provides a novel perspective for the study of energy input and usage.

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“…The main sources of secondary raw materials for steel production are waste construction materials, old cars, appliances, and household waste, which means that the waste can contain a large number of metals, plastics and rubber, glass, paint, oil, and even salts [1][2][3][4][5][6][7][8][9]. Besides that, fluxes (additives) of limestone or lime, reductants, such as brown coal or coke, and oxygen and/or natural gas are injected into electric arc furnaces in addition to scrap iron [2][3][4][10][11][12][13][14][15][16][17].…”

Section: Introductionmentioning

confidence: 99%

Application of a Simple Pretreatment in the Process of Acid Leaching of Electric Arc Furnace Dust

Trifunović,

Milić,

Avramović

et al. 2024

Metals

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Experimental investigations of the effectiveness of the pretreatment of the acid leaching process of a representative sample of electric arc furnace dust (EAF dust) and characterization of a representative sample were performed. As EAF dust is globally defined as hazardous solid industrial waste, and it contains a high percentage of zinc and other useful components, in this paper, the application of pretreatment will be carried out in order to increase the efficiency of the further process of acid leaching, all with the aim of using EAF dust as a secondary raw material for metal valorization. The pretreatment involved the application of a simple process of leaching the EAF dust sample with distilled water. Under the following defined optimal leaching conditions: time—30 min, ratio of solid to liquid phase—1:10, temperature—ambient, and stirring speed—500 rpm, a reduction in the content of water-soluble components was achieved, namely, 83% Cl, 92% K, 74% Na, 14% Cd, 15% Ca, and 19% F. The application of the pretreatment enables significantly better filtration of the suspension and increases the leaching efficiency of zinc and other useful components in the further process of leaching EAF dust with a sulfuric acid solution, compared with the process of direct acid leaching of EAF dust.

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Foamy slag practice to enhance the energy efficiency of electric arc furnace: An industrial scale validation

Cited by 12 publications

References 3 publications

Effect of Argon Flow Rate on Power Consumption of a 120‐t Ladle Furnace

Effect of Argon Flow Rate on Power Consumption of a 120‐t Ladle Furnace

The impact of eco-environmental regulation on green energy efficiency in China - Based on spatial economic analysis

Application of a Simple Pretreatment in the Process of Acid Leaching of Electric Arc Furnace Dust

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