Academic Journal
Production of Direct Reduction Grade Iron Concentrate from Pickling Sludge by Reduction Calcination and Magnetic Separation.
| Τίτλος: | Production of Direct Reduction Grade Iron Concentrate from Pickling Sludge by Reduction Calcination and Magnetic Separation. |
|---|---|
| Συγγραφείς: | Gao, Chunqing, Yang, Huifen, Xu, Jian, Wang, Ning |
| Πηγή: | Recycling (MDPI AG); Aug2026, Vol. 11 Issue 8, p145, 13p |
| Θεματικοί όροι: | Magnetic separation, Iron, Chemical reduction, Volatization, Iron ores, Industrial wastes, Reducing agents, Metal wastes |
| Περίληψη: | Taking pickling sludge generated from the steel rolling process at a Chinese steel mill as the subject of study, this research investigates a combined mineral processing and metallurgical process involving gasification-reduction roasting, magnetic separation, and waste acid recovery. The main elements in this pickling sludge are Fe and Cl, with contents of 46.50% and 12.70%, respectively. The primary component is chlorine-containing iron oxide, and a significant amount of amorphous material is also present. The study investigated the effects of various calcination temperatures, calcination times, reducing agent dosages, and material thicknesses on gasification-reduction performance indicators. The results indicate that using a reduction calcination–grinding–magnetic separation process, with coal as the reducing agent, a calcination temperature of 1100 °C, a reducing agent dosage of 15%, and a calcination time of 2 h, the chlorine volatilization rate exceeds 97%. Furthermore, when the roasted ore is ground to a particle size where 85% passes through a −0.076 mm screen and is recovered via magnetic separation, an iron concentrate with a grade of over 69.50% can be obtained. This iron concentrate meets the quality requirements for high-grade iron concentrates used in direct reduced iron (DRI) production. The small amount of tailings from the iron concentration process can be utilized in the production of bricks, cement, and other products, thereby achieving the efficient comprehensive utilization of acid washing sludge. [ABSTRACT FROM AUTHOR] |
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| Βάση Δεδομένων: | Complementary Index |
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| Header | DbId: edb DbLabel: Complementary Index An: 196617239 RelevancyScore: 1082 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 1082.42456054688 |
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| Items | – Name: Title Label: Title Group: Ti Data: Production of Direct Reduction Grade Iron Concentrate from Pickling Sludge by Reduction Calcination and Magnetic Separation. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Gao%2C+Chunqing%22">Gao, Chunqing</searchLink><br /><searchLink fieldCode="AR" term="%22Yang%2C+Huifen%22">Yang, Huifen</searchLink><br /><searchLink fieldCode="AR" term="%22Xu%2C+Jian%22">Xu, Jian</searchLink><br /><searchLink fieldCode="AR" term="%22Wang%2C+Ning%22">Wang, Ning</searchLink> – Name: TitleSource Label: Source Group: Src Data: Recycling (MDPI AG); Aug2026, Vol. 11 Issue 8, p145, 13p – Name: Subject Label: Subject Terms Group: Su Data: <searchLink fieldCode="DE" term="%22Magnetic+separation%22">Magnetic separation</searchLink><br /><searchLink fieldCode="DE" term="%22Iron%22">Iron</searchLink><br /><searchLink fieldCode="DE" term="%22Chemical+reduction%22">Chemical reduction</searchLink><br /><searchLink fieldCode="DE" term="%22Volatization%22">Volatization</searchLink><br /><searchLink fieldCode="DE" term="%22Iron+ores%22">Iron ores</searchLink><br /><searchLink fieldCode="DE" term="%22Industrial+wastes%22">Industrial wastes</searchLink><br /><searchLink fieldCode="DE" term="%22Reducing+agents%22">Reducing agents</searchLink><br /><searchLink fieldCode="DE" term="%22Metal+wastes%22">Metal wastes</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: Taking pickling sludge generated from the steel rolling process at a Chinese steel mill as the subject of study, this research investigates a combined mineral processing and metallurgical process involving gasification-reduction roasting, magnetic separation, and waste acid recovery. The main elements in this pickling sludge are Fe and Cl, with contents of 46.50% and 12.70%, respectively. The primary component is chlorine-containing iron oxide, and a significant amount of amorphous material is also present. The study investigated the effects of various calcination temperatures, calcination times, reducing agent dosages, and material thicknesses on gasification-reduction performance indicators. The results indicate that using a reduction calcination–grinding–magnetic separation process, with coal as the reducing agent, a calcination temperature of 1100 °C, a reducing agent dosage of 15%, and a calcination time of 2 h, the chlorine volatilization rate exceeds 97%. Furthermore, when the roasted ore is ground to a particle size where 85% passes through a −0.076 mm screen and is recovered via magnetic separation, an iron concentrate with a grade of over 69.50% can be obtained. This iron concentrate meets the quality requirements for high-grade iron concentrates used in direct reduced iron (DRI) production. The small amount of tailings from the iron concentration process can be utilized in the production of bricks, cement, and other products, thereby achieving the efficient comprehensive utilization of acid washing sludge. [ABSTRACT FROM AUTHOR] – Name: Abstract Label: Group: Ab Data: <i>Copyright of Recycling (MDPI AG) is the property of MDPI and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.3390/recycling11080145 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 13 StartPage: 145 Subjects: – SubjectFull: Magnetic separation Type: general – SubjectFull: Iron Type: general – SubjectFull: Chemical reduction Type: general – SubjectFull: Volatization Type: general – SubjectFull: Iron ores Type: general – SubjectFull: Industrial wastes Type: general – SubjectFull: Reducing agents Type: general – SubjectFull: Metal wastes Type: general Titles: – TitleFull: Production of Direct Reduction Grade Iron Concentrate from Pickling Sludge by Reduction Calcination and Magnetic Separation. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Gao, Chunqing – PersonEntity: Name: NameFull: Yang, Huifen – PersonEntity: Name: NameFull: Xu, Jian – PersonEntity: Name: NameFull: Wang, Ning IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 08 Text: Aug2026 Type: published Y: 2026 Identifiers: – Type: issn-print Value: 23134321 Numbering: – Type: volume Value: 11 – Type: issue Value: 8 Titles: – TitleFull: Recycling (MDPI AG) Type: main |
| ResultId | 1 |