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Selective Separation of Hematite by a Synthesized Depressant in Various Scales of Anionic Reverse Flotation
Yazd University, Yazd, Iran.
Yazd University, Yazd, Iran.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.ORCID iD: 0000-0002-2265-6321
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Minerals and Metallurgical Engineering.
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2019 (English)In: Minerals, ISSN 2075-163X, E-ISSN 2075-163X, Vol. 9, no 2, article id 124Article in journal (Refereed) Published
Abstract [en]

Demand for high-quality iron concentrate is significantly increasing around the world. Thus, the development of the techniques for a selective separation and rejection of typical associated minerals in the iron oxide ores, such as phosphorous minerals (mainly apatite group), is a high priority. Reverse anionic flotation by using sodium silicate (SS) as an iron oxide depressant is one of the techniques for iron ore processing. This investigation is going to present a synthesized reagent “sodium co-silicate (SCS)” for hematite depression through a reverse anionic flotation. The main hypothesis is the selective depression of hematite and, simultaneously, modification of the pulp pH by SCS. Various flotation experiments, including micro-flotation, and batch flotation of laboratory and industrial scales, were conducted in order to compare the depression selectivity of SS versus SCS. Outcomes of flotation tests at the different flotation scales demonstrated that hematite depression by SCS is around 3.3% higher than by SS. Based on flotation experiment outcomes, it was concluded that SCS can modify the pH of the process at ~9.5, and the plant reagents (including NaOH, Na2CO3, and SS gel) can be replaced by just SCS, which can also lead to a higher efficiency in the plant. 

Place, publisher, year, edition, pages
MDPI, 2019. Vol. 9, no 2, article id 124
Keywords [en]
anionic reverse flotation; phosphorus; depression; sodium co-silicate
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-73481DOI: 10.3390/min9020124ISI: 000460799000058Scopus ID: 2-s2.0-85063594686OAI: oai:DiVA.org:ltu-73481DiVA, id: diva2:1302784
Note

Validerad;2019;Nivå 2;2019-04-08 (svasva)

Available from: 2019-04-05 Created: 2019-04-05 Last updated: 2019-04-15Bibliographically approved

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Chelgani, Saeed ChehrehRosenkranz, Jan

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