Change search
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf
On-line measurement of charge position and filling level in industrial-scale mills
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering.
Boliden Mineral AB.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.ORCID iD: 0000-0002-8032-9388
2005 (English)In: Minerals & metallurgical processing, ISSN 0747-9182, Vol. 22, no 3, p. 121-129Article in journal (Refereed) Published
Abstract [en]

Pilot-scale experiments presented in this paper show good results in detecting charge movement when using the Metso Continuous Charge Measurement system (CCM). In this technique, a strain-gauge sensor is mounted on a steel plate that, in turn, is placed under one of the rubber lifters used to lift the charge. A deflection profile is registered and the signal pattern is correlated to charge position and filling level. Charge measurements in industrial-scale mills - a ball mill at the LKAB iron ore beneficiation plant in Malmberget and an AG-mill at the Boliden Aitik copper mine plant - as well as a comparison with a pilot scale ball mill are presented. The results indicate that the system is very capable of following the normal variations that occur in the mills. Determination of various charge parameters, such as volume and toe position, is shown to be both robust and accurate. A prediction error of less than ± 1% in the mill filling level was achieved, which should be adequate for process-control purposes. By studying the nature of the signal it is possible to get a better understanding of the dynamics of grinding circuits. The influence of the ore feed size on the dynamic charge behavior in an AG-mill was studied, and there were interesting indications of a change in slurry rheology. Another feature of the sensor is its ability to respond quickly to various operating conditions. This allows an operator to continuously follow the grinding process and to incorporate the signal into a control strategy for real-time actions, thereby running at optimal operating conditions.

Place, publisher, year, edition, pages
2005. Vol. 22, no 3, p. 121-129
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-7901Local ID: 6530f060-a249-11db-8975-000ea68e967bOAI: oai:DiVA.org:ltu-7901DiVA, id: diva2:980791
Note
Validerad; 2005; 20070111 (pafi)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2018-02-28Bibliographically approved

Open Access in DiVA

No full text in DiVA

Authority records BETA

Tano, KentPålsson, Bertil

Search in DiVA

By author/editor
Tano, KentPålsson, Bertil
By organisation
Department of Civil, Environmental and Natural Resources EngineeringSustainable Process Engineering
In the same journal
Minerals & metallurgical processing
Metallurgy and Metallic Materials

Search outside of DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric score

urn-nbn
Total: 61 hits
CiteExportLink to record
Permanent link

Direct link
Cite
Citation style
  • apa
  • harvard1
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Other style
More styles
Language
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Other locale
More languages
Output format
  • html
  • text
  • asciidoc
  • rtf