Enabling safe dry cake disposal of bauxite residue by deliquoring and washing with a membrane filter press
Kinnarinen, Teemu; Lubieniecki, Boguslaw; Holliday, Lloyd; Helsto, Jaakko-Juhani; Häkkinen, Antti (2015-02-16)
Post-print / Final draft
Kinnarinen, Teemu
Lubieniecki, Boguslaw
Holliday, Lloyd
Helsto, Jaakko-Juhani
Häkkinen, Antti
16.02.2015
Waste Management and Research
33
3
258-266
SAGE Publications
School of Engineering Science
Kaikki oikeudet pidätetään.
© SAGE Publications 2015
© SAGE Publications 2015
Julkaisun pysyvä osoite on
https://urn.fi/URN:NBN:fi-fe2018101138088
https://urn.fi/URN:NBN:fi-fe2018101138088
Tiivistelmä
Dry cake disposal is the preferred technique for the disposal of bauxite residue, when considering environmental issues together with possible future utilisation of the solids. In order to perform dry cake disposal in an economical way, the deliquoring of the residue must be carried out efficiently, and it is also important to wash the obtained solids well to minimise the amount of soluble soda within the solids. The study presented in this article aims at detecting the most important variables influencing the deliquoring and washing of bauxite residue, performed with a horizontal membrane filter press and by determining the optimal washing conditions. The results obtained from pilot-scale experiments are evaluated by considering the properties of the solids, for instance, the residual alkali and aluminium content, as well as the consumption of wash liquid. Two different cake washing techniques, namely classic washing and channel washing, are also used and their performances compared. The results show that cake washing can be performed successfully in a horizontal membrane filter press, and significant improvements in the recovery of alkali and aluminium can be achieved compared with pressure filtration carried out without washing, or especially compared with the more traditionally used vacuum filtration.
Lähdeviite
Kinnarinen, T., Lubieniecki, B., Helsto, J.-J., Häkkinen, A., Enabling safe dry cake disposal of bauxite residue by deliquoring and washing with a membrane filter press, Waste Management & Research, 2015, 33(3): 258-266. DOI: 10.1177/0734242X14567503
Alkuperäinen verkko-osoite
http://journals.sagepub.com/doi/10.1177/0734242X14567503Kokoelmat
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