Experimental and Mechanism Research on Vacuum Carbothermal Reduction of Zinc-Containing Electric Arc Furnace Dust

He, Xuan; Xie, Shufang; Li, Yuanxing; Lv, Xiaodong; Huang, Run

doi:10.1007/s11837-022-05375-0

Cited by 14 publications

(3 citation statements)

References 21 publications

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“…There are many professional explanations for 3D printing technology, such as manufacturing free solids, additive manufacturing (AM), and rapid prototyping [1]. 3D printing technology refers to the use of an ever-increasing amount of geometric representation to generate physical data.…”

Section: Introductionmentioning

confidence: 99%

Improvement and Experimental Explore on Coordinated Control of Kinematic Mechanism of FDM 3D Printer

2022

Advances in Multimedia

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As the main component of the 3D printing industry, the fused deposition process covers all aspects of the industry with its advantages of low R&D investment, high practicability, and open source programs. However, due to process problems, problems have arisen in terms of printing efficiency and molding quality. To this end, we designed a large-scale multinozzle FDM printing device using the high-current fused deposition (FDM) printing principle. The defects of small size, slow printing speed, and low precision are deeply studied, and the machine structure is optimized according to the structural strength analysis. In this paper, the theoretical design and static analysis of the overall mechanical part of the large-scale FDM device are carried out, and then, the selection of the movement organization structure and movement method is theoretically analyzed. A modular flow chart is designed for the control system to coordinate and control the parallel and precise operation of multiple nozzles, and the relationship function between the main controller, power driver, and heating module is designed. By modifying the firmware parameter command, we can find out the optimal method running on the platform and discuss the function usage of the slicing software in detail. According to the current problems of FDM printing equipment, various factors affecting printing speed were analyzed from the perspective of printing accuracy, and the process parameters of 3D printer were studied through orthogonal experiments. Speed, nozzle temperature, idling speed, and fill rate were studied, and the relationship between factors affecting printing speed and printing accuracy was obtained. Use a simple model print to measure the overall performance of your product. The stability of the system is verified by short-term and long-term printing tests. The analysis results show that the forming performance and stability of the large-scale FDM are improved significantly.

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Section: Introductionmentioning

confidence: 99%

Improvement and Experimental Explore on Coordinated Control of Kinematic Mechanism of FDM 3D Printer

2022

Advances in Multimedia

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“…The particle size distribution and microstructure of EAFD Table .1 (Halli et al 2017;Lozano-Lunar et al 2019;Laubertova et al 2020a;Ahmad et al 2022;Borda and Torres 2022;Chen et al 2022;Coleti et al 2022;Frilund et al 2022;Grudinsky et al 2022;Gómez-Marroquín et al 2022;He et al 2022;Zoraga et al 2022;Ordoñez et al 2022;Qiu et al 2023;Li et al 2023) presents a comprehensive overview of EAFD compositions from various recent studies conducted in different countries. As technology advances, the distinction between zinc content levels determined by the place of production becomes less clear.…”

Section: Figure2mentioning

confidence: 99%

Recent developments on the removal of zinc from electric arc furnace dust by using microwave heating

Xiong,

Wang,

Qiu

et al. 2024

Environ Sci Pollut Res

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Electric arc furnace dust (EAFD) is a hazardous by-product of steel production. As global steel output increases, substantial amounts of EAFD are produced, which causes significant environmental issues. EAFD contains amounts of Fe and Zn, which could be reused as raw materials in the steelmaking process. However, zinc oxides can be reduced and vaporized during this process, forming zinc vapor that contaminates equipment surfaces and causes damage. Consequently, various pyrometallurgical methods have been proposed for zinc removal from EAFD. Due to the extensive usage of carbonaceous materials, these methods contribute to significant CO 2 , raising concerns about greenhouse gas emissions.Microwave heating offers an efficient, energy-saving, and environmentally friendly alternative to pyrometallurgical approaches. EAFD can generate heat under microwave irradiation without carbon addition, which means the CO 2 emissions can be reduced by replacing the reductant in the microwave heating process. Furthermore, microwaves enhance zinc removal reactions to a certain extent, resulting in higher efficiency. Thus, employing microwave heating for EAFD processing has significant potential for future development. This paper reviews recent research on using microwave heating for zinc removal from EAFD, focusing on the heating behavior of EAFD in microwaves and the mechanisms of zinc removal. This review will be crucial for researchers working on processing EAFD using microwave heating and could help guide the development of more sustainable and efficient methods.

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“…According to this calculation, the amount of dust and sludge generated by Chinese iron and steel enterprises in 2022 was about 82–122 million tons. As a large industrial solid waste, the metallurgical dust and sludge contains harmful elements such as Zn, K and Na 8 – 10 . Simply stacking and burying metallurgical dust sludge not only takes up land resources, but also harms the environment 11 , 12 .…”

Section: Introductionmentioning

confidence: 99%

Process and mechanism of preparing metallized blast furnace burden from metallurgical dust and sludge

Gao,

Chai,

Wang

et al. 2024

Sci Rep

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Metallurgical dust and sludge are solid waste resources with recycling value. In recent years, rotary hearth furnace has become the most important means to treat metallurgical dust and sludge because of its wide range of raw materials and strong treatment capacity. In this study blast furnace ash and converter sludge were selected as the research objects, and high-quality metallized pellets were prepared based on the rotary hearth furnace process. The strength changed of pellets, the reduction process of iron oxides and the removal process of zinc during the roasting of pellets in rotary hearth furnace were studied. To explore the reasonable roasting condition for preparing metallized pellets in rotary hearth furnace. The optimum roasting temperature of the pellets was 1250℃ and the roasting time was 25 min. The compressive strength, metallization rate and dezincification rate of metallized pellets reached 1361N, 97.44% and 95.67%, respectively. The efficient resource utilization of various metallurgical dust and sludge is realized.

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Experimental and Mechanism Research on Vacuum Carbothermal Reduction of Zinc-Containing Electric Arc Furnace Dust

Cited by 14 publications

References 21 publications

Improvement and Experimental Explore on Coordinated Control of Kinematic Mechanism of FDM 3D Printer

Improvement and Experimental Explore on Coordinated Control of Kinematic Mechanism of FDM 3D Printer

Recent developments on the removal of zinc from electric arc furnace dust by using microwave heating

Process and mechanism of preparing metallized blast furnace burden from metallurgical dust and sludge

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