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Shape and liberation studies on grinding products from autogenous and conventional mill using an automatic image analyser
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Sustainable Process Engineering.
Luleå University of Technology.
1985 (English)In: Scandinavian journal of metallurgy, ISSN 0371-0459, E-ISSN 1600-0692, Vol. 14, no 6, p. 283-288Article in journal (Refereed) Published
Abstract [en]

Samples were collected from the Stekenjokk and Malmberget concentrators, operated by Boliden Mineral AB and Luossavaara-Kiirunavaara AB respectively. The Stekenjokk ore consists of massive pyrite with disseminated chalcopyrite and sphalerite; it assays 1. 4 % Cu and 3. 2 % Zn. The Malmberget ore mainly contains magnetite with a coarse-crystalline structure; run-of-mine ore assays are about 40 % Fe and 0. 6 % P. Using an automatic image analyzer, it appears that fully autogenous grinding down to flotation fineness results in better liberation and particle shape for flotation than is obtained with a combination of primary autogenous and ball mill grinding. Fully autogenous grinding also creates smoother particle surfaces.

Abstract [en]

Samples were collected from the Stekenjokk and Malmberget concentrators, operated by Boliden Mineral AB and Luossavaara-Kiirunavaara AB respectively. The Stekenjokk ore consists of massive pyrite with disseminated chalcopyrite and sphalerite; it assays 1. 4 % Cu and 3. 2 P% Zn. The Malmberget ore mainly contains magnetite with a coarse-crystalline structure; run-of-mine ore assays are about 40 5 Fe and 0. 6 % P. Using an automatic image analyzer, it appears that fully autogenous grinding down to flotation fineness results in better liberation and particle shape for flotation than is obtained with a combination of primary autogenous and ball mill grinding. Fully autogenous grinding also creates smoother particle surfaces.

Place, publisher, year, edition, pages
1985. Vol. 14, no 6, p. 283-288
National Category
Metallurgy and Metallic Materials
Research subject
Mineral Processing
Identifiers
URN: urn:nbn:se:ltu:diva-11058Local ID: 9f621d80-b4fb-11db-bf94-000ea68e967bOAI: oai:DiVA.org:ltu-11058DiVA, id: diva2:984007
Note
Godkänd; 1985; 20070205 (pafi)Available from: 2016-09-29 Created: 2016-09-29 Last updated: 2017-11-24Bibliographically approved

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Forssberg, Eric

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