Recovery of sodium from bauxite residue by pressure filtration and cake washing
Kinnarinen, Teemu; Lubieniecki, Boguslaw; Holliday, Lloyd; Helsto, Jaakko-Juhani; Häkkinen, Antti (2015-08-10)
Post-print / Final draft
Kinnarinen, Teemu
Lubieniecki, Boguslaw
Holliday, Lloyd
Helsto, Jaakko-Juhani
Häkkinen, Antti
10.08.2015
International Journal of Mineral Processing
141
20-26
Elsevier
School of Engineering Science
Kaikki oikeudet pidätetään.
© Elsevier 2015
© Elsevier 2015
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2018101138085
https://urn.fi/URN:NBN:fi-fe2018101138085
Tiivistelmä
Bauxite residue, the main waste fraction of alumina production, is extremely hazardous to the environment, as well as to human health. After the recovery of the pregnant liquor, the washed and thickened bauxite residue is typically pumped as thick slurry to a residue disposal area. The use of filter presses for the final washing, in order to further enhance the recovery of alkali and aluminum, together with effective deliquoring, may be beneficial in many cases. In this study, a vertical filter press (A = 0.1 m2) was used for the filtration and washing of industrial bauxite residue. The effectiveness of various washing sequences, as well as variation in the local washing results in the filter cakes, was compared. The results show that Na recovery of 98% can be obtained at a wash ratio as low as 1.4. It was also observed that not only the wash ratio is important: temperature and pressure have a significant effect on the dissolution of Na.
Lähdeviite
Kinnarinen, T., Lubieniecki, B., Holliday, L., Häkkinen, A., Recovery of sodium from bauxite residue by pressure filtration and cake washing, International Journal of Mineral Processing, 2015, 141: 20-26. DOI: 10.1016/j.minpro.2015.06.006
Alkuperäinen verkko-osoite
https://www.sciencedirect.com/science/article/pii/S0301751615001489?via%3DihubKokoelmat
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