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- 1Bianchini Moroni, Ana Maria
- 1Chen, Qiang
- 1Crozier, Brendan Matthew
- 1Dalili, Neda
- 1Han, Chunfen
- 1Haroon, M Hasin
Results for "supervisors_tesim:"Liu, Qi (Chemical and Materials Engineering)""
Dewatering of the oil sands mature fine tailings (MFT) is studied through pressure filtration following treatment by dual polymer flocculants. Polymer pairs consisting of anionic polyacrylamide (A3335) and cationic polyDADMAC (Alcomer 7115), and A3335 and non-ionic polyethylene oxide (PEO) are...
Bitumen extraction from oil sands operation in Fort McMurray, Canada produces an immense quantity of slurry waste that is discharged to tailings ponds. These ponds now stretch over a region which is roughly 1.5 times the area occupied by Vancouver city mainly due to slow consolidation process of...
Currently the recovery of niobium oxide minerals from carbonatite niobium ores relies on the use of non-selective cationic collectors. This leads to complicated process flowsheets involving multiple desliming and multiple reverse flotation stages, and low niobium recovery. In this research,...
Chitosan, a naturally occurring polymer, was studied as a potential selective depressant in the differential flotation of sulfide minerals. In single mineral flotation tests, chalcopyrite, galena, sphalerite and pyrite were depressed to different extents. However, in the differential flotation of...
Flocculation and dewatering of kaolinite suspensions and oil sands mature fine tailings using dual polymersDownload
The development of a method to consolidate and dewater Athabasca oil sands mature fine tailings (MFT) is one of the major challenges facing Alberta’s oil sands industry. This thesis presents studies performed on the flocculation and dewatering of kaolinite suspensions (the major clay component...
High molecular weight polyacrylamide (PAM) was tested as a potential selective depressant in the differential flotation separation of galena and chalcopyrite using potassium ethyl xanthate (KEX) as a collector. In single mineral flotation, PAM depressed chalcopyrite while galena was floatable....
Carboxymethyl Chitosan as a Selective Depressant in Differential Flotation of Galena and ChalcopyriteDownload
Toxic inorganic depressants are routinely used in the differential flotation of polymetallic sulfide ores and it is desirable that they be replaced with environmentally benign chemicals. Chitosan, as a natural and non-toxic polymer, has been proven to be an efficient depressant for copper sulfide...
Environmental concerns about water-based extraction necessitate the development of an alternative non-aqueous extraction method. One of the challenges that any non-aqueous extraction process is encountered is the elimination of suspended fine solids from solvent-diluted bitumen. This study...
The correlation between froth recovery and air recovery was established in a top-feeding mechanical flotation column. It was also found that the particles were stratified in froth layer, with hydrophobic particles (organic phase) concentrated in the upper region, and hydrophilic particles...
The current bitumen extraction process has an alarming and increasing environmental impact that is forcing the industry to find a better way to produce oil. The solution that is in development is a solvent based bitumen extraction process. The removal of fines solids is still an important issue...