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Określenie flokulacji, adsorpcji - desorpcji dla koncentratu skalenia sodowego w obecności różych polimerów
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Abstrakty
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.
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.
Rocznik
Tom
Strony
127--142
Opis fizyczny
Bibliogr. 23 poz.
Twórcy
autor
- Istanbul University Mining Eng Depart, Avcýlar-Istanbul-Tukey, ilginkur@istanbul.edu.tr
Bibliografia
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- 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.
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- 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.
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Bibliografia
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bwmeta1.element.baztech-article-BAT6-0013-0012