Fragmentation in production rounds and mill through-put in the Aitik copper mine: a summary of development projects 2002-2009
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)
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
IdentifiersURN: 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
International Symposium on Rock Fragmentation by Blasting : 24/11/2012 - 29/11/2012
Godkänd; 2013; 20121203 (ysko)2016-09-302016-09-30Bibliographically approved