kth.sePublikationer
Ändra sökning
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Effects of Chemical Additives on Rheological Properties of Dry Ground Ore: A Comparative Study
Luleå Tekniska Universitet.
KTH, Skolan för industriell teknik och management (ITM), Materialvetenskap, Processer. (Powder metallurgy)ORCID-id: 0000-0002-6339-4612
Luleå Tekniska Universitet.
Luleå Tekniska Universitet.
Visa övriga samt affilieringar
2021 (Engelska)Ingår i: Mineral Processing and Extractive Metallurgy Review, ISSN 0882-7508, E-ISSN 1547-7401Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

It is well documented that chemical additives (grinding aid “GA”) during grinding can increase mill throughput, reduce water and energy consumption, narrow the particle size distribution of products, and improve material flowability. These advantages have been linked to their effects on the rheology, although there is a gap in understanding GA effectiveness mechanism on the flow properties. The present study aims to fill this gap using different GAs (Zalta™ GR20-587, Zalta™ VM1122, and sodium hydroxide) through batch grinding experiments of magnetite ore and addressing the mechanisms of their effects on the rheology by an FT4 Powder Rheometer as a unique system. Experimental results showed that GA improved grinding efficiency (energy consumption and product fineness), which were well-correlated with basic flow energy, specific energy, aerated basic flow energy, and aerated energy. Moreover, the rheometry measurement showed strong linear correlations between basic flow energy, specific energy, and the resulting work index when GAs was considered for grinding, which confirmed the effect of GA on ground particles’ flowability. Zalta™ VM1122, a polysaccharide-based grinding aid, showed the best performance with 38.8% reduction of basic flow energy, 20.4% reduction of specific energy, 24.6% reduction of aerated basic flow energy, and 38.3% reduction of aerated energy. It also showed the strongest correlation between the grinding parameters and flow parameters (r > 0.93). The present investigation shows a strong indication that the predominant mechanism of GAs is based on the alteration of rheological properties and identify Zalta™ VM1122 as the best GA.

Ort, förlag, år, upplaga, sidor
Taylor & Francis, 2021.
Nyckelord [en]
Energy; flowability; dry grinding; FT4 Powder Rheometer; grinding aid
Nationell ämneskategori
Metallurgi och metalliska material Annan materialteknik
Forskningsämne
Metallurgisk processvetenskap; Teknisk materialvetenskap
Identifikatorer
URN: urn:nbn:se:kth:diva-293862DOI: 10.1080/08827508.2021.1890591ISI: 000621299700001Scopus ID: 2-s2.0-85101657395OAI: oai:DiVA.org:kth-293862DiVA, id: diva2:1548853
Anmärkning

QC 20210521

Tillgänglig från: 2021-05-03 Skapad: 2021-05-03 Senast uppdaterad: 2024-01-17Bibliografiskt granskad

Open Access i DiVA

fulltext(1297 kB)205 nedladdningar
Filinformation
Filnamn FULLTEXT01.pdfFilstorlek 1297 kBChecksumma SHA-512
0c786b597d640b7af5c47e19a8db5fdeb8634c47c3a3d85ff6421d5fe037298222b13555a06ebd1fd9a7b013b6dfb8977847ba0c16e3813b8351d9024a32e4ce
Typ fulltextMimetyp application/pdf

Övriga länkar

Förlagets fulltextScopushttps://www.tandfonline.com/doi/full/10.1080/08827508.2021.1890591

Person

Hulme-Smith, Christopher

Sök vidare i DiVA

Av författaren/redaktören
Hulme-Smith, ChristopherChelgani, Saeed Chehreh
Av organisationen
Processer
I samma tidskrift
Mineral Processing and Extractive Metallurgy Review
Metallurgi och metalliska materialAnnan materialteknik

Sök vidare utanför DiVA

GoogleGoogle Scholar
Totalt: 206 nedladdningar
Antalet nedladdningar är summan av nedladdningar för alla fulltexter. Det kan inkludera t.ex tidigare versioner som nu inte längre är tillgängliga.

doi
urn-nbn

Altmetricpoäng

doi
urn-nbn
Totalt: 162 träffar
RefereraExporteraLänk till posten
Permanent länk

Direktlänk
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annat format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annat språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf