VPA Filtrering: Uppskattning av kakresistans och oreducerbar saturation och deras påverkan på avvattning
Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Vertical Plate Airblow (VPA) filtration is widely used in the mining industry to dewater concentrates for shipment and downstream metallurgical processing. The aim of this work was to investigate whetherfundamental and empirical equations for filtration could be applied to describe VPA filtration units. Tests were carried out on three different materials: dolomite, sphalerite and galena concentrates, using a small scale laboratory unit as well as a larger pilot scale unit. Based on these tests values of average specific filtration resistance, porosity and irreducible saturation were determined. These parameters were later used to simulate and predict the moisture reduction due to air blowing. The result was that, while having quite high variation in average specific filtration resistance, the moisture content could be both estimated for same conditions and predicted for changed conditions. The best results were achieved when using the classical filtration equation for the laboratory VPA unit and determining the irreducible saturation considering the wetting angle.
Place, publisher, year, edition, pages
2014. , 83 p.
Teknik, Avvattning, filtrering, VPA
IdentifiersURN: urn:nbn:se:ltu:diva-44309Local ID: 21915ce1-6954-425a-be80-9a9a3cc3fff0OAI: oai:DiVA.org:ltu-44309DiVA: diva2:1017585
Subject / course
Student thesis, at least 30 credits
Sustainable Process Engineering, master's level
Validerat; 20140901 (global_studentproject_submitter)2016-10-042016-10-04Bibliographically approved