Determination of flocculation and adsorptiondesorption characteristics of Na-feldspar concentrate in the presence of different polymers

• Autorzy: Kursun I.

Warianty tytułu

PL

Określenie flokulacji, adsorpcji - desorpcji dla koncentratu skalenia sodowego w obecności różych polimerów

• Języki publikacji: EN

Abstrakty

EN

Feldspars are among the most important mineral groups on the earth. Although the group of feldspar has 20 minerals, only nine of them are well known. These minerals make up the largest percentage of minerals in nature. Esan albite beneficiation plant faces serious disposal problems in dewatering the minus 20 μm albite concentrate. Flocculation studies conducted with albite in the presence of various charged and nonionic polymers indicate that nonionic polymers exhibit the best performance. Electrokinetic studies on pure albite shows that it is negatively charged throughout the entire pH and the isoelectric point of the mineral is below pH 2. Adsorption of the nonionic polymer (N-300) is found to increase with increasing pH and concentration of the polymer. A hydrogen bonding mechanism between the polymer carbonyl (-C=O) or the amide (-NH2) groups and the surface oxygen species is proposed to be responsible for the adsorption of nonionic polymer onto albite.

PL

Zakład Wzbogacania Albitu Esan boryka się z poważnym problemem, jakim jest odwodnienie koncentratu zawierającego ziarna albitu poniżej 20 μm. Badania nad flokulacja zawiesiny albitu z udziałem róznych polielektrolitów i niejonowych polimerów wykazały, ze niejonowe polimery wykazują najlepsze działanie flokulujące. Badania elektroforetyczne przeprowadzono na czystym albicie wykazały, że cząstki tego minerału są ujemnie naładowane w całym badanym zakresie pH, a punkt izoelektryczny jest położony poniżej pH =2. Adsorpcja niejonowego polimeru N-300 wzrastała wraz ze wzrostem pH oraz wraz ze wzrostem stężenia polimeru. Zaproponowano mechanizm wiązania oparty na wiązaniu wodorowym między grupami –C=O lub –NH4 polimeru i tlenowymi grupami na powierzchni ziaren albitu. Mechanizm ten jest odpowiedzialny za adsorpcję niejonowego polimeru na albicie.

Słowa kluczowe

EN

albite; flocculation; zeta potential; adsorption; nonionic polymer

PL

albit; flokulacja; potencjał dzeta; adsorpcja; polimery niejonowe

• Wydawca: Oficyna Wydawnicza Politechniki Wrocławskiej
• Czasopismo: Physicochemical Problems of Mineral Processing
• Rocznik: 2010
• Tom: Vol. 44
• Strony: 127--142
• Opis fizyczny: Bibliogr. 23 poz.

Twórcy

autor

Kursun I.

• Istanbul University Mining Eng Depart, Avcýlar-Istanbul-Tukey,

Bibliografia

• 1. AKERS, R.J. 1975.Flocculation. I Chem Services, London.
• 2. ATTIA, YA, RUBIO, 1975. Determination of Very Low Concentrations of Polyacrylamide and Polyethylene Flocculants by Nephelometry. Polymer, 1. (7):135-138.
• 3. CELIK, M.S., AHMAD, S., A1-HASHIM, H.S. 1991. Adsorption/Desorption of Polymers from Saudi Arabian Limestone. J. Petroleum Sci and Engineering, 6:213-223.
• 4. CELIK, M.S., YASAR, E. 1995. Electrokinetic Properties of Some Hydrated Boron Minerals. 1. Colloid Interface Sci. 173:181-185.
• 5. CHOU, L., WOLLAS, R. 1985. Steady-State Kinetics and Dissolution Mechanism of Albite. Arner. 1. Sci. 285:963-993.
• 6. FUERSTENAU, M.E., PALMER, B.R. 1976. Anionic Flotation of Oxides and Silicates. Ġn Flotation: AM. Gaudin Memorial Volume, VoL 1 , AIME PubL, New York, p. 148-196.
• 7. GRIOT, O., KITCHENER, JA 1965. Role of Surface Silanol Groups in the Flocculation of Silica Suspensions by Polyacrylamide. Trans. Faraday Soc. 61: 1 026-1038.
• 8. HELGESON, H.E., MURPHY, W.M., AAGAARD, P. 1984. Thermodynamic and Kinetic Constraints on Reaction Rates among Minerals and Aqueous solution. Geochim. et Cosmochim. Acta, 48:2405-2432.
• 9. HILL, TE, KENWORTHY, H., RITHCEY, RA., GERARD, JA 1969. Separation ofFeldspar, Quartz, and Mica from Granite, U.S. Bureau of Mines Research and Investigations 7245.
• 10. HOLLANDER, AF., SOMASUNDARAN, P., GRYTE, E.E. 1981. Adsorption Characteristics of Polyacrylamide and Sulfonate-Containing Polyacrylamide Copolymers on Sodium Kaolinite. 1. Applied Polymer Sci. 26:2123-2138.
• 11. HURLBUT, E.S., 1971. Dana's Manual of Mineralogy, 18th, Wiley, p.467.
• 12. POTTER, MJ. 1985. Mineral Facts and Problems, U.S Bureau of Mines Bulletin. 675:255-263.
• 13. SLATER, R.W., KITCHENER, JA 1966. Characteristics of Flocculation of Mineral Suspensions by Polymers. Discussion Faraday Soc. 42:267-275.
• 14. KANGAL, O., EROĞLU, B., GÜNEY, A., 2001, “Treatment of Low Grade Albites by Jet Flotation”, New Developments in Mineral Processing, Önal, et. al. (eds), IXth Balkan Mineral Processing Congress, 11-13 September 2001, Istanbul-Turkey, p. 253-258.
• 15. KANGAL O., GÜNEY, A., GÜRKAN, V., 1998, “Evaluation of Feldspar Ores with High Titanium Contents” Innovations in Mineral and Coal Processing, Proceeding of the 7th International Mineral Processing Symposium, Istanbul, Turkey, 15-17 September 1998, eds. Atak et al, Balkema, Rotterdam, ISBN 90 5809 013 2, pp. 333-338.
• 16. KANGAL, O., GÜNEY, A., 2001, “Comparison of HIWMS and MGS in the Evaluation of Low Grade Feldspar Ores”, New Developments in Mineral Processing, Önal, et. al. (eds), IXth Balkan Mineral Processing Congress, 11-13 September 2001, Istanbul-Turkey, p. 331-336
• 17. KURSUN, I., KAYTAZ, Y., IPEKOGLU, B., CELIK, M.S., 1996 . Flocculation Behaviour of Fine Albite Concentrate with Various Polymers, In Changing Scopes in Mineral Processing, Eds. M. Kemal et al., Proceedings of 6th International Processing Symposium, Kuşadası, Turkey, pp. 661-666.
• 18. KURSUN,I., IPEKOGLU,B., CELĠK.,MS., KAYTAZ,Y.,2000.Flocculation and Adsorption Mechanism of Polymers on Albite, Proceedings of the XXI International Min. Proc. Cong. Italy, p.25-31.
• 19. STUMM, W., MORGAN, 1.1. 1981. Aquation Chemistry, 2nd ed. New York, John Wiley&Sons p.780.
• 20. STUMM, W., FURRER, G., KUNZ, B. 1983. The Role of Surface Coordination in Precipitation an Dissolution of Mineral Phase. Croat. Acta. 58:593-611.
• 21. WARREN, LJ., KITCHENER, 1.A 1972. Role o Fluoride in the Flotation of Feldspar. Inst. Minin and Metal. Trans. Sect. C 81:137-147.
• 22. WIKBY, A 1972. The surface Resistance of Glass Electrodes in Neutral Solutions, J. Electro Chem.33:145-159.
• 23. YARAR, B. 1982. Polymeric Flocculants and Selectiv Flocculation. in Solution Behavior of Surfactan, K.L. Mittal and EJ. Fendler (ed), Plenum Pres New York, p. 1333-1364.