Study of recycling blast furnace dust by magnetization roasting with straw charcoal as reductant

• Autorzy: Ju Jinrong , Feng Yali , Li Haoran , Zhang Qian

Identyfikatory

DOI

10.37190/ppmp/149265

• Języki publikacji: EN

Abstrakty

EN

Blast furnace dust generated in the iron-making process not only contains a large amount of iron but also the widely used non-ferrous metal zinc, which is classified as hazardous waste. In this study, the process of recycling blast furnace dust by magnetization roasting with straw charcoal as the reductant is proposed, and the mechanism of magnetization roasting was explored through thermodynamic analysis, X-ray diffraction analysis, and thermogravimetric analysis. The results for the thermodynamic analysis showed that the reduction of blast furnace dust by the straw charcoal was feasible theoretically. The increase in the roasting temperature not only promoted the reduction of hematite (Fe₂O₃) but also reduced zinc ferrite (ZnFe₂O₄) to Fe₃O₄ and ZnO. The results showed that almost all Fe₂O₃ and ZnFe₂O₄ in the blast furnace dust were reduced to Fe₃O₄ and ZnO under the conditions of straw charcoal amount of 6%, the roasting temperature of 750℃, and the roasting time of 60 min. Then, the iron concentrate with the iron recovery of 85.61% and an iron grade of 63.50% was obtained by the magnetic separation. Meanwhile, the grade of zinc in the iron concentrate was 0.19%. Finally, the flowsheet of simultaneously recovering iron and zinc from the blast furnace dust was put forward, which could realize that 85.61% of iron was recovered and 92.57% of zinc was extracted into the solution.

Słowa kluczowe

EN

blast furnace dust; straw charcoal; magnetization roasting; hematite; zinc ferrite

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2022
• Tom: Vol. 58, iss. 3
• Strony: art. no. 149265
• Opis fizyczny: Bibliogr. 32 poz., rys., wykr.

Twórcy

autor

Ju Jinrong

• Civil and Resource Engineering School, University of Science and Technology Beijing, Beijing 100083, China
• Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
• University of Chinese Academy of Sciences, Beijing 100049, China

autor

Feng Yali

• Civil and Resource Engineering School, University of Science and Technology Beijing, Beijing 100083, China

autor

Li Haoran

• Key Laboratory of Biochemical Engineering, Institute of Process Engineering, Chinese Academy of Sciences, Beijing 100190, China
• University of Chinese Academy of Sciences, Beijing 100049, China

autor

Zhang Qian

• Civil and Resource Engineering School, University of Science and Technology Beijing, Beijing 100083, China

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Uwagi

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).