Analysis on the Effects of Filter Shape and Magnetic Force on the Collecting Efficiency of Welding Spatter

doi:10.15683/kosdi.2024.9.30.593

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2024 Vol.20, Issue 3 Preview Page Next Page

Original Article

Analysis on the Effects of Filter Shape and Magnetic Force on the Collecting Efficiency of Welding Spatter 필터 형상과 자력 특성이 용접 불티 포집 효율에 미치는 영향 분석: 신연제¹ㆍ소수현²ㆍ유우준³*
Yeon-Je Shin¹, SooHyun So², WooJun You³*; ¹Research Engineer, Fire Centre, Korea Conformity Laboratories, Cheongju, Republic of Korea
²Professor, Department of fire safety, Kyungil University, Gyeongsan, Republic of Korea
³Professor, Department of fire safety, Kyungil University, Gyeongsan, Republic of Korea

30 September 2024. pp. 593-600

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Abstract

Purpose: In this study, fundamental research was conducted to capture sparks generated during the arc welding process. Method: To this end, a mock-up collection device was developed, consisting of a blower for suction, a nozzle, and a filter and magnet at the suction point. To analyze the correlation between the shape of the filter and its magnetic properties, the porosity and pore size of both carbon filters and Colgate filters were quantified under conditions of a welding machine capacity of 1,800W and a welding time of 70s. The collection efficiency of sparks was calculated for magnetic strengths of 2.6, 3.4, and 4.05kgf. Result and Conclusion: As a result, empirical formulas were derived for the blower's suction capacity, magnetic strength, porosity, and pore diameter for capturing sparks, with experimental results confirming consistency within ± 10%. The findings of this study are expected to provide a quantitative design approach for collection devices that can minimize the risk of fire spread associated with welding operations at construction sites.

Keywords

Welding Spatter Collector Device

Porosity of Filter

Magnetic Force

Welding Fire

Welding Spatter and fume

연구목적: 본 연구에서는 아크 용접 과정에서 발생하는 불티를 포집하기 위한 기초 연구를 수행하였다. 연구방법: 이를 위해서 불티를 흡입하기 위한 송풍기와 노즐 그리고 흡입부의 필터와 자석으로 구성된 목업 포집 장치를 제작하였다. 필터의 형상과 자력 특성에 따른 상관관계를 분석하기 위하여 용접기의 용량 1,800W, 용접 시간 70s인 조건에서 카본필터와 콜게이트 필터 각각의 기공률과 기공의 크기를 정량화하였으며, 자력 크기 2.6, 3.4, 4.05kgf인 경우 불티의 포집 효율을 산출하였다. 연구결과 및 결론: 그 결과 불티를 포집하기 위한 송풍기 흡입 용량, 자력의 크기, 기공률 그리고 기공 직경에 대한 경험식을 도출하였으며, 실험 결과가 ± 10% 이내에서 일치하는 것을 확인하였다. 본 연구 결과는 건설 현장에서 용접 작업에 따른 화재 확산 위험을 최소화할 수 있는 정량화된 포집기 설계 방안을 제시하는데 활용이 가능할 것으로 판단된다.

키워드

불티포집장치

필터 기공율

자력

용접 화재

용접불티 및 용접흄

References

Ha, H.-C. (2007). Study on Work Environment Improvement and Applicability of Exposure Standards for Reducing Welding Fume (Manganese) in the Shipbuilding Industry, Korea Occupational Safety and Health Agency, 2008-4-5, Korea Occupational Safety and Health Agency.
Hashemabad, S.G., Gu, Z., Ando, T. (2016). "Flux-less direct soldering of aluminum by ultrasonic surface activation." Journal of Materials Processing Technology, Vol. 233, pp. 135-141.10.1016/j.jmatprotec.2016.02.015
Hojjati, A.Y.M., Immarigeon, J. (2004). "Fusion bonding/welding of thermoplastic composites." Journal of Thermoplastic Composite Materials, Vol. 43, pp. 161-165.
Lim, D.-S. (2023). Technical Guidelines for Fire Prevention in Welding and Cutting Operations, Korea Occupational Safety and Health Agency, KOSHA GUIDE F-1-2023, Korea Occupational Safety and Health Agency.
Liu, Y., Liang, C., Wei, A. (2018). "Solder-free electrical Joule welding of macroscopic graphene assemblies." Materials Today Nano, Vol. 3, pp. 1-8.10.1016/j.mtnano.2018.09.005
Narasimhan, P.N, Mehrotra S., Raja, A.R., Vashista, m., Yusufzai, M.Z.K. (2019). "Development of hybrid welding processes incorporating GMAW and SMAW." Materialstoday: Proceedings, Vol. 18, pp. 2924-2932.10.1016/j.matpr.2019.07.162
National Fire Agency (2023). "National fire data system." https://www.nfds.go.kr
Ryu, H.-U. (2015). Guidelines for Health Management of Welding Operations, Korea Occupational Safety and Health Agency, KOSHA GUIDE H-73-2015, Korea Occupational Safety and Health Agency.
Shin, Y.J., Ko, G.H., Ro, K.C., You, W.J. (2021). "Correlation analysis of collection efficiency according to suction conditions of welding spatter extraction system." Korean Journal of Hazardous Materials, Vol. 9, No. 1, pp. 66-71.10.31333/kihm.2021.9.1.66
Shin, Y.J., You, W.J. (2020). "Effects of welding time and electrical power on thermal characteristics of welding spatter for fire risk analysis." Energies, Vol. 13, No. 24, pp. 1-13.10.3390/en13246502
Urban, J.L. (2017). Spot Ignition of Natural Fuels by Hot Metal Particles. Ph.D. Thesis, University of California Berkeley, Berkeley, CA, USA.10.1016/j.proci.2016.09.014
Xu, X., Zheng, C., Yan, P., Zhu, W. (2016). "Effect of electrode configuration on particle collection in a high-temperature electrostatic precipitator." Separation and Purification Technology, Vol. 166, pp. 157-163.10.1016/j.seppur.2016.04.039

Information

Publisher :The Korean Society of Disaster Information
Publisher(Ko) :한국재난정보학회
Journal Title :Journal of the Society of Disaster Information
Journal Title(Ko) :한국재난정보학회논문집
Volume : 20
No :3
Pages :593-600
DOI :https://doi.org/10.15683/kosdi.2024.9.30.593

[1] Ha, H.-C. (2007). Study on Work Environment Improvement and Applicability of Exposure Standards for Reducing Welding Fume (Manganese) in the Shipbuilding Industry, Korea Occupational Safety and Health Agency, 2008-4-5, Korea Occupational Safety and Health Agency.

[2] Hashemabad, S.G., Gu, Z., Ando, T. (2016). "Flux-less direct soldering of aluminum by ultrasonic surface activation." Journal of Materials Processing Technology, Vol. 233, pp. 135-141.10.1016/j.jmatprotec.2016.02.015

[3] Hojjati, A.Y.M., Immarigeon, J. (2004). "Fusion bonding/welding of thermoplastic composites." Journal of Thermoplastic Composite Materials, Vol. 43, pp. 161-165.

[4] Lim, D.-S. (2023). Technical Guidelines for Fire Prevention in Welding and Cutting Operations, Korea Occupational Safety and Health Agency, KOSHA GUIDE F-1-2023, Korea Occupational Safety and Health Agency.

[5] Liu, Y., Liang, C., Wei, A. (2018). "Solder-free electrical Joule welding of macroscopic graphene assemblies." Materials Today Nano, Vol. 3, pp. 1-8.10.1016/j.mtnano.2018.09.005

[6] Narasimhan, P.N, Mehrotra S., Raja, A.R., Vashista, m., Yusufzai, M.Z.K. (2019). "Development of hybrid welding processes incorporating GMAW and SMAW." Materialstoday: Proceedings, Vol. 18, pp. 2924-2932.10.1016/j.matpr.2019.07.162

[7] National Fire Agency (2023). "National fire data system." https://www.nfds.go.kr

[8] Ryu, H.-U. (2015). Guidelines for Health Management of Welding Operations, Korea Occupational Safety and Health Agency, KOSHA GUIDE H-73-2015, Korea Occupational Safety and Health Agency.

[9] Shin, Y.J., Ko, G.H., Ro, K.C., You, W.J. (2021). "Correlation analysis of collection efficiency according to suction conditions of welding spatter extraction system." Korean Journal of Hazardous Materials, Vol. 9, No. 1, pp. 66-71.10.31333/kihm.2021.9.1.66

[10] Shin, Y.J., You, W.J. (2020). "Effects of welding time and electrical power on thermal characteristics of welding spatter for fire risk analysis." Energies, Vol. 13, No. 24, pp. 1-13.10.3390/en13246502

[11] Urban, J.L. (2017). Spot Ignition of Natural Fuels by Hot Metal Particles. Ph.D. Thesis, University of California Berkeley, Berkeley, CA, USA.10.1016/j.proci.2016.09.014

[12] Xu, X., Zheng, C., Yan, P., Zhu, W. (2016). "Effect of electrode configuration on particle collection in a high-temperature electrostatic precipitator." Separation and Purification Technology, Vol. 166, pp. 157-163.10.1016/j.seppur.2016.04.039

Journal of the Society of Disaster Information ISSN:1976-2208(Print) 2671-5287(Online) 한국재난정보학회논문집

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