Dust forming mechanisms in the copper converting process
1996 (English)In: Second International Symposium on Extraction and Processing for the Treatment and Minimization of Wastes, 1996: proceedings of an international symposium /c sponsored by the Extraction and Processing Division (EPD) of TMS, and held in Scottsdale, Arizona, October 27-30, 1996 / [ed] V. Ramachandran; C.C. Nesbitt, Warrendale, Pa: Minerals, Metals & Materials Society, 1996, 105-114 p.Conference paper (Refereed)
A controlled dust generation whereby the dust generated would be enriched with specific metals would considerably facilitate the possibilities of recovering metals from such dusts. A basic understanding of the dust forming mechanisms is of fundamental importance to achieve a controlled dust generation. The present study deals with dust formation in a copper converting process. Dust samples collected from various places in the gas cleaning system were characterised for chemical and mineralogical composition using chemical analysis as well as microprobe analysis. Thermodynamic calculations were used to predict the formation of chemically formed dust at various temperatures and amounts of leakage air to the gas system. The results show that a separation of mechanically formed dust, e.g. SiO sub 2 , Cu and chemically formed dust, e.g. Pb, Zn, As, Bi, could, to some extent, be obtained due to their different particle sizes. A selective condensation of Pb, Zn and As at a various temperatures could, according to thermodynamic calculations, be possible at high temperature. A selective condensation of metals requires an airtight gas cleaning system or a gas cleaning system with a limited amount of leakage air in order to maintain the desired temperature level.
Place, publisher, year, edition, pages
Warrendale, Pa: Minerals, Metals & Materials Society, 1996. 105-114 p.
Research subject Process Metallurgy
IdentifiersURN: urn:nbn:se:ltu:diva-38028Local ID: c45f1e00-b0b5-11dd-9c9d-000ea68e967bISBN: 0-87339-369-4 (print)OAI: oai:DiVA.org:ltu-38028DiVA: diva2:1011527
International Symposium on Extraction and Processing for the Treatment and Minimization of Wastes : 27/10/1996 - 30/10/1996
Godkänd; 1996; 20081112 (andbra)2016-10-032016-10-03Bibliographically approved