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Języki publikacji
Abstrakty
A cleaning possibility of low (BD) and high ash content (IM) lignites in NaCl solutions using a reverse flotation technique was studied. Preliminary test results indicated that BD lignite cannot be cleaned effectively in the traditional manner because gangue was floated first rather than a combustible material. Further studies indicated that the lignite cleaning in NaCl solutions using the reverse flotation technique is possible. However, a large quantity of dodecyl amine hydrochloride (DAH) was required. A lower ash content in a concentrate can be obtained by addition of NaCl. A concentrate yield can be im-proved by addition of starch. Under the test conditions, for BD lignite with the ash content in the feed 15.19%, the ash content in the concentrate 11.44% and the concentrate yield 67.38% were obtained. Similarly, for IM lignite with the ash content in the feed 57.40%, the ash content in the concentrate 32.90% and the concentrate yield 25.08% were obtained. The flotation rate constant k and maximum ash recovery ε∞ significantly increased with the NaCl concentration.
Słowa kluczowe
Rocznik
Tom
Strony
695--706
Opis fizyczny
Bibliogr. 34 poz., rys., tab.
Twórcy
autor
- National Engineering Research Center for Coal Processing and Purification, China University of Mining and Technology, Xuzhou 221116, China
autor
- Low Carbon Energy Institute, China University of Mining and Technology, Xuzhou 221116, China
- Departmentof Chemical and Materials Engineering, University of Ualberta, Edmonton T6G 2R3, Canada
Bibliografia
- ANDERSON R.J., 1916. Recent progress in flotation. Journal of the Franklin Institute, 181(5), 643-657.
- ARNOLD B.J., APLAN F.F., 1989. The hydrophobicity of coal macerals. Fuel, 68(5), 651–658.
- ATEŞOK G., ÇELIK M.S., 2000. A new flotation scheme for a difficult-to-float coal using pitch additive in dry grinding. Fuel, 79(12), 1509–1513.
- BOURNIVAL G., PUGH R.J., ATA S., 2012. Examination of NaCl and MIBC as bubble coalescence inhibitor in relation to froth flotation. Minerals Engineering, 25(1), 47–53.
- CEBECI Y., 2002. The investigation of the floatability improvement of Yozgat Ayridam lignite using various collectors. Fuel, 81(3), 281–289.
- CRAIG V.S.J., NINHAM B.W., PASHLEY R.M., 1993. Effect of electrolytes on bubble coalescence. Nature, 364, 317–319.
- DEY S., 2012. Enhancement in hydrophobicity of low rank coal by surfactants—A critical overview. Fuel Processing Technology, 94(1), 151–158.
- DING K.J., LASKOWSKI J.S., 2006. Coal reverse flotation. Part II: Cleaning of a subbituminous coal. Minerals Engineering, 19(1), 79–86.
- HAMPTON M.A., NGUYEN A.V., 2009. Accumulation of dissolved gases at hydrophobic surfaces in water and sodium chloride solutions: Implications for coal flotation. Minerals Engineering, 22, 786–792.
- HARVEY P.A., NGUYEN A.V., EVANS G.M., 2002. Influence of electrical double-layer interaction on coal flotation. Journal of Colloid and Interface Science, 250, 337–343.
- JIA R., HARRIS G.H., FUERSTENAU D.W., 2000. An improved class of universal collectors for the flotation of oxidized and low–rank coal. International Journal of Mineral Processing, 58, 99–118.
- KELEBEK S., DEMI U.R., SAHBAZ O., UCAR A., CINAR M., KARAGUZEL C., OTEYAKA B., 2008. The effects of dodecylamine, kerosene and pH on batch flotation of Turkey's Tuncbilek coal. In-ternational Journal of Mineral Processing, 88, 65–71.
- KLASSEN V.I., MOKROUSOV V.A., 1963. An introduction to the theory of flotation. Butterwords, London, 338-342.
- LASKOWSKI J., 1965. Coal flotation in solutions with raised concentration of inorganic salts. Colliery Guardian, 361–365.
- LI C., SOMASUNDARAN P., 1991. Reversal of bubble charge in multivalent inorganic salt solutions—effect of magnesium. Journal of Colloid and Interface Science, 146(1), 215–218.
- MARCELJA S., 2006. Selective coalescence of bubbles in simple electrolytes. The Journal of Physical Chemistry, 110(26), 13062–13067.
- MARRUCCI G., NICODEMO L., 1967. Coalescence of gas bubbles in aqueous solutions of inorganic electrolytes. Chemical Engineering Science, 22(9), 1257–1265.
- NGUYEN A.V., RALSTON J., SCHULZE H.J., 1998. On modelling of bubble–particle attachment probability in flotation. International Journal of Mineral Processing, 53(4), 225–249.
- OZDEMIR O., TARAN E., HAMPTON M.A., KARAKASHEV S. I., NGUYEN A.V., 2009. Surface chemistry aspects of coal flotation in bore water. International Journal of Mineral Processing, 92, 177–183.
- OZDEMIR O., 2013. Specific ion effect of chloride salts on collectorless flotation of coal. Physicochemi-cal Problems of Mineral Processing, 49(2), 511–524.
- PATIL D.P., LASKOWSKI J.S., 2008. Development of zero conditioning procedure for coal reverse flotation. Minerals Engineering, 21(5), 373–379.
- PUGH R.J., WEISSENBORN P., PAULSON O., 1997. Flotation in inorganic electrolytes; the relation-ship between recovery of hydrophobic particles, surface tension, bubble coalescence and gas solubili-ty. International Journal of Mineral Processing, 51, 125–138.
- PAULSON O., PUGH R. J., 1996. Flotation of inherently hydrophobic particles in aqueous solutions of inorganic electrolytes. Langmuir, 12, 4808–4813.
- PAWLIK M., LASKOWSKI J.S., 2003. Coal reverse flotation, Part I. Coal Preparation, 23, 91–112.
- PAWLIK M., LASKOWSKI J.S., 2003. Coal reverse flotation, Part II. Coal Preparation, 23, 113–127.
- STONESTREET P., FRANZIDIS J.P., 1988. Reverse flotation of coal—A novel way for the beneficiation of coal fines. Minerals Engineering, 1(4), 343–349.
- STONESTREET P., FRANZIDIS J.P., 1989. Development of the reverse coal flotation process: Depres-sion of coal in the concentrates. Minerals Engineering, 2(3), 393–402.
- STONESTREET P., FRANZIDIS J.P., 1992. Development of the reverse coal flotation process: Applica-tion to column cells. Minerals Engineering, 5(9), 1041–1051.
- SUBRAHMANYAM T.V., FORSSBERG E., 1988. Froth stability, particle entrainment and drainage in flotation—A review. International Journal of Mineral Processing, 23, 33–53.
- TAGGART A. F., 1920. Flotation. Journal of the Franklin Institute, 189(4), 485-498.
- WEISSENBORN P.K., PUGH R.J., 1996. Surface tension of aqueous solutions of electrolytes: relation-ship with ion hydration, oxygen solubility, and bubble coalescence. Journal of Colloid and Interface Science, 184, 550–563.
- YOON R.H., 1982. Flotation of coal using micro-bubbles and inorganic salts. Mining Congress Journal, 68(12), 76–80.
- YOON R.H., YORDAN J.L., 1991. Induction time measurements for the quartz-amine flotation system. Journal of Colloid and Interface Science, 141, 374–383.
- ZHANG W.J., TANG X.Y., 2014. Flotation of lignite pretreated by sorbitan monooleate. Physicochemi-cal Problems of Mineral Processing, 50(2), 759–766.
Typ dokumentu
Bibliografia
Identyfikator YADDA
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