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Fragmentation in production rounds and mill through-put in the Aitik copper mine: a summary of development projects 2002-2009
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
Boliden Mineral AB.
Luleå University of Technology, Department of Civil, Environmental and Natural Resources Engineering, Mining and Geotechnical Engineering.
2013 (English)In: Rock Fragmentation by Blasting, FRAGBLAST 10: Proceedings of the 10th International Symposium on Rock Fragmentation by Blasting / [ed] Pradeep K. Singh; Amalendu Sinha, Boca Raton, Fla.: CRC Press/Balkema , 2013, 117-128 p.Conference paper (Refereed)
Abstract [en]

The Boliden Mineral Aitik mine has worked to increase the through-put in the primary AG mills together with Swebrec. A raised specific charge from 0.9 to 1.3 kg/m3 raised the throughput by nearly 7%. This was implemented in 2009. For two rounds Swebrec has mapped joints from 3D images to determine the rock mass factor and combined Split Desktop measurements with sieving of muck-pile samples to get the sieving curve of the muck pile, based on the Swebrec function. For a 3rd round such curves were fed into a crusher model and results compared with Online data. The crusher product can affect the mills by three mechanisms; a harder blasting that i) produces more fines that may pass the mill intact, ii) gives a finer crusher product which takes a shorter time to grind iii) increases the amount of larger stones that pass the crusher intact but have an increased grindability. All three must contribute to the increased mill through-put.

Place, publisher, year, edition, pages
Boca Raton, Fla.: CRC Press/Balkema , 2013. 117-128 p.
Research subject
Mining and Rock Engineering
Identifiers
URN: urn:nbn:se:ltu:diva-34224Local ID: 85be4a86-8f03-4ab2-917c-13124d0eafdeISBN: 978-0-415-62143-4ISBN: 978-0-203-38767-2 (PDF)OAI: oai:DiVA.org:ltu-34224DiVA: diva2:1007474
Conference
International Symposium on Rock Fragmentation by Blasting : 24/11/2012 - 29/11/2012
Note
Godkänd; 2013; 20121203 (ysko)Available from: 2016-09-30 Created: 2016-09-30Bibliographically approved

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