Study for Manufacturing of Zinc Sulfate from Electric Arc Furnace Dust by Hydrometallrugical Process

Dong Ju Shin; Sung-Ho Joo; Dongseok Lee; Shun Myung Shin

doi:10.7844/kirr.2023.32.1.33

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2023 Vol.32, Issue 1 Preview Page Next Page

Research Paper

Study for Manufacturing of Zinc Sulfate from Electric Arc Furnace Dust by Hydrometallrugical Process 제강분진으로부터 습식제련공정에 의한 황산아연의 제조 연구

28 February 2023. pp. 33-41

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Abstract

Herein, we selectively recovered Zn and produced ZnSO₄ from electric arc furnace dust using a hydrometallurgical process. The analysis of the properties of the electric arc furnace dust revealed that the Fe content (9.9%) was relatively low while the Mn content (19%) was high as compared to the composition of general dust. Therefore, an appropriate hydrometallurgical process was designed based on the properties of the raw materials. In the leaching process involving the use of 1.6 M sulfuric acid and 20% solid-liquid ratio at 60℃ for 1 h, 85% of the Zn and Mn got dissolved while the Fe was not leached. To selectively recover Zn, a solvent extraction process using D2EHPA as the extractant was chosen, and 99% of the Zn was extracted using 0.8 M D2EHPA with 32% saponification and an O/A ratio of 2 using counter-current 3-stage extraction. Mn was entirely scrubbed with an aqueous sulfuric acid solution of pH 1.5. Finally, Zn was concentrated and stripped using 1.5 M sulfuric acid at an O/A ratio of 4 using counter-current 4-stage stripping. The stripping solution contained 40 g/L of Zn, and 99.9% of ZnSO₄∙H₂O was obtained by vacuum distillation.

Keywords

electric arc furnace dust

zinc

hydrometallurgy

zinc sulfate

본 연구에서는 제강분진으로부터 습식제련을 이용하여 아연을 선택적으로 회수하고 황산아연을 제조하고자 하였다. 제강분진의 성상분석을 통해 기존의 제강분진과 다르게 철의 함유량이 9.9%로 상대적으로 낮고 망간이 19%로 다량 함유되어 있었으며 이에 알맞은 습식제련 공정을 설계하였다. 침출공정에서는 고액비, 온도, 황산 농도별 실험을 통해 1.6M 황산, 20% 고액비, 60℃, 1시간동안 침출하여 85%의 아연, 망간을 용해시키고 철은 침출되지 않았다. 망간으로부터 아연을 선택적으로 회수하기 위해 D2EPHA를 사용한 용매추출 공정을 선택하였고 0.8M D2EHPA, 32% 비누화도, O/A 비 2, 향류 3단 추출을 통해 에서 99% 아연을 추출하였으며, 공동 추출된 망간은 pH 1.5로 조정한 황산 수용액으로 전량 세정하였다. 최종적으로 1.5M 황산을 이용하여 O/A 비 4, 향류 4단 탈거를 통해 아연을 농축 탈거하였다. 탈거액에는 40g/L의 아연이 함유되어 있었으며 이를 감압증류하여 99.9%의 황산아연 1수화물을 획득하였다.

키워드

제강분진

아연

습식제련

황산아연

References

Sohn, H-S., 2018 : Status of pyrometallurgical treatment technology of EAF Dust, J. of Korean Inst. of Resources Recycling, 27(2), pp.68-76.

Sohn, H-S., 2019 : Current status of zinc smelting and recycling, J. of Korean Inst. of Resources Recycling, 28(5), pp.30-41. 10.7844/kirr.2020.29.5.3

Moon, S-M., Kim, T-D., 2014 : Unit process analysis for EAF dust plant operation, J. of Korean Inst. of Resources Recycling, 23(1), pp.80-85. 10.7844/kirr.2014.23.1.80

Yoon, J-H., Yoon, C-H., 2021 : A study on the separation and recovery of useful metallic elements(Zn, Pb) from the 2nd dust in refining of curde-zinc oxide, Resources Recycling, 30(1), pp.66-76. 10.7844/kirr.2021.30.1.66

Jang, W-S., Jeon, H-Y., 2015 : Hazardous waste recycling industry status and implications ① Electric arc furnace dust: Heavy metal dust as a resources, VIP Report, 617, pp.1-21.

Masson, N., Briol, P., 2017 : A brief summary of zinc oxide processing methods available for the Bongará deposit, PBSIM & BFS Consulting Engineering, Published by ZINC ONE RESOURCES INC, pp.1-11.

Korea Zinc R&D Center, 2006 : The recovery of valuable materials and making clean slag from EAF dust, Reosouce Reccling R&D Program Report, Published by Ministry of Environment, Republic of Korea.

Olper, M., 1993 : The EZINEX process, a new and advanced way for electrowinning from a chlorine solution, pp.491-494, I.J. Mathew (Ed.), World Zinc ’93, AIMM, Victoria, Australia.

SHIMICO, Zinc sulfate ; Features and applications. https://www.shimico.com/blog/news/scientific-articles/zinc-sulfate/, December 26, 2022.

Caravaca, C., Cobo, A., Alguacil, F.J., 1994 : Considerations about the recycling of EAF flue dust as source for the recovery of valuable metals by hydrometallurgical process, Resources Conserv. Recycl., 10, pp.35-41. 10.1016/0921-3449(94)90036-1

Mordogan, M., Cicek, T., Isik, A., 1999 : Caustic soda leach of electric arc furnace dust, Trans. Eng. Environ. Sci., 23, pp.199-207.

Baik, D.S., Fray, D.J., 2000 : Recovery of zinc from electric arc furnace dusts by leaching with aqeous hydrochloric acid, plating of zinc and regeneration of electrolyte, Trans. Inst. Min. Metall. Sect. C: Min. Process. Extr. Metall., 109, pp.C121-C128. 10.1179/mpm.2000.109.3.121

Leclerc, N., Meus, E., Lecuire, J-M., 2002 : Hydrometallurgical recovery of zinc and lead from electric arc furnace dust using mononitrilotriacetate anion and hexahydrated ferric chloride, J. Hazard. Mater., B91, pp.257-270. 10.1016/S0304-3894(01)00394-611900917

Cruells, M., Roca, A., Nunez, C., 1992 : Electric arc furnace flue dusts: characterization and leaching with sulphuric acid, Hydrometallurgy, 31, pp.213-231. 10.1016/0304-386X(92)90119-K

Havlik, B., Friedrich, B., Stopic, S., 2004 : Pressure leaching of EAF dust with sulphuric acid, Erzmetall, 57(2), pp.113-120.

Kim, Y-C., Song, Y-J., Park, Y-K., 2012 : Recycling of ferro-manganese furnace dust collected from converter, J. of Korean Inst. of Resources Recycling, 21(3), pp.21-27. 10.7844/kirr.2012.21.3.021

Ha, T-Y., Jo, Y-M., Park, Y-K., et al., 2015 : Recovery of manganese compounds from electric arc furnace dust by aluminothermy process, J. of Korean Oil Chemists’ Soc., 32(1), pp.25-30. 10.12925/jkocs.2015.32.1.23

Cheng, C.Y., 2000 : Purification of synthetic laterite leach solution by solvent extraction using D2EHPA, Hydrometallurgy, 56, pp.369-386. 10.1016/S0304-386X(00)00095-5

Shin, D.J., Joo, S-H., Oh, C-H. et al., 2019 : A study on Zn recovery from other metals in the spent mixed batteries through a sequence of hydrometallurgical processes, Environ. Technol., 40(26), pp.3512-3522. 10.1080/09593330.2018.148066429799331

Information

Publisher :The Korean Institute of Resources Recycling
Publisher(Ko) :한국자원리싸이클링학회
Journal Title :Resources Recycling
Journal Title(Ko) :자원리싸이클링
Volume : 32
No :1
Pages :33-41
Received Date : 2022-12-16
Revised Date : 2022-12-28
Accepted Date : 2023-01-03
DOI :https://doi.org/10.7844/kirr.2023.32.1.33

Resources Recycling ISSN:2765-3439(Print) 2765-3447(Online) 자원리싸이클링

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