Masters Theses
Abstract
"The current study investigated the effect of novel organic/inorganic (hybrid) polyacrylamide polymer as ash (slimes) depressant in fine coal flotation for the possibility to enhance the combustible recovery and ash rejection. Raw coal samples contain about 25% of ash-forming minerals were crushed, grinded to -75um and floated in the presence of in-house synthesized hybrid Polyacrylamide (Al(OH)3-PAM or Al-PAM) at different operational parameters. Denver flotation cell with a 5-Liters capacity was used and the parameters investigated include: Al-PAM dosage, Al-PAM conditioning time, dual use of Al-PAM and a dispersant, impeller rotation speed and pulp's pH. For comparison purposes, commercially available polyacrylamide polymers (PAMs) were also tested.
Results show a significant improvement in both combustible recovery and ash rejection at 0.25 ppm Al-PAM dosage. Further improvement in ash reduction was achieved when flotation was performed using dual dispersant/Al-PAM system. At natural pH, the maximum combustible recovery and ash rejection were obtained at Al-PAM dosage of 0.25 ppm, dispersant dosage of 0.8 ppm, conditioning time of 6 minutes and impeller speed of 1800 rpm. Zeta potential values of both raw coal and concentrates samples showed a large shift to more positive zeta potential values after flotation which indicates a significant depression of ash-forming minerals (slimes) when Al-PAM polymer was used"--Abstract, page iii.
Advisor(s)
Alagha, Lana Z.
Committee Member(s)
Galecki, Greg
Asle Zaeem, Mohsen
Department(s)
Mining Engineering
Degree Name
M.S. in Mining Engineering
Publisher
Missouri University of Science and Technology
Publication Date
Fall 2015
Pagination
xii, 100 pages
Note about bibliography
Includes bibliographical references (pages 96-99).
Rights
© 2015 Ontlametse Kenneth Molatlhegi, All rights reserved.
Document Type
Thesis - Open Access
File Type
text
Language
English
Subject Headings
Coal preparationFlotationCoalPolyacrylamideSlimes (Mining)
Thesis Number
T 10796
Electronic OCLC #
936208804
Recommended Citation
Molatlhegi, Ontlametse Kenneth, "Studies on the role of organic-inorganic hybrid polyacrylamides in fine coal flotation" (2015). Masters Theses. 7476.
https://scholarsmine.mst.edu/masters_theses/7476