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Ratio of starting raw material and fluorinating agent in the process of purifying silica-containing raw material

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Abstract

The influence of NH4HF2 fluorinating agent on the yield of ammonium hexafluorosilicate intermediate product and amorphous silica in the fine purification of silica-containing raw material by the fluoride technology has been studied. Mixtures with different fluorinating agent contents were investigated by synchronous thermal analysis. The determination of the phases of intermediate products at various ratios of starting silica-containing raw material and NH4HF2 was carried out by the X-ray phase analysis method. The optimal ratio of components for the preparation of ammonium hexafluorosilicate and amorphous silica with maximal yield and purity level of the final products was determined.

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References

  1. Rimkevich, V.S., Malovitskii, Yu.N., and Demyanova, L.P., RF Patent 2286947, 2006.

  2. Demyanova, L.P., Buinovskii, A.S., Rimkevich, V.S., et al., Rational Processing of Quartz-Containing Raw Materials by the Fluoride Method, Izv. Tomsk. Polytekh. Univ., 2010, vol. 317, no. 3, p. 77.

    Google Scholar 

  3. Dolezal, J., Povondra, P., and Sulcek, Z., Decomposition Techniques in Inorganic Analysis, New York: Elsevier, 1966.

    Google Scholar 

  4. Kolikova, N.N., Khalizova, V.A., Polupanova, L.I., et al., Thermochemical Method of Silicate Rock Decomposition with the Use of Ammonium Fluoride, Zh. Anal. Khim., 1985, vol. 40, no. 11, p. 1998.

    CAS  Google Scholar 

  5. Melnichenko, E.I., Ftoridnaya pererabotka redkometal’nykh rud Dal’nego Vostoka (Fluoride Processing of Rare-Metal Rocks of Far East), Vladivostok: Dal’nauka, 2002.

    Google Scholar 

  6. Kurilenko, L.N., Interaction of Silicon-Containing Minerals with Ammonium Hydrogen Fluoride, Cand. Sci. (Chem.) Dissertation, Vladivostok, 2003.

  7. Rakov, E.G. and Melnichenko, E.I., The Properties and Reactions of Ammonium Fluorides, Russ. Chem. Rev., 1984, vol., no. 9, p. 851.

  8. Kurilenko, L.N., Laptash, N.M., Merkulov, E.B., et al., About Fluorination of Silicon-Containing Minerals with Ammonium Hydrogen Fluoride, E-Journal “Issledovano v Rossii,” 2002, 130/021011, p. 1465.

  9. Rimkevich, V.S., Pushkin, A.A., Malovitskii, Yu.N., et al., Physicochemical Processes of the Fluoride Processing of Aluminum Ores, Theor. Found. Chem. Eng., 2010, vol. 44, no. 6, p. 844.

    Article  CAS  Google Scholar 

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Authors and Affiliations

  1. Institute of Geology and Nature Management, Far East Branch, Russian Academy of Sciences, Relochnyi per. 1, Blagoveshchensk, 675000, Russia

    L. P. Demyanova & A. S. Zaeva

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  1. L. P. Demyanova
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  2. A. S. Zaeva
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Correspondence to L. P. Demyanova.

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Original Russian Text © L.P. Demyanova, A.S. Zaeva, 2012, published in Teoreticheskie Osnovy Khimicheskoi Tekhnologii, 2012, Vol. 46, No. 4, pp. 458–462.

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Demyanova, L.P., Zaeva, A.S. Ratio of starting raw material and fluorinating agent in the process of purifying silica-containing raw material. Theor Found Chem Eng 46, 368–372 (2012). https://doi.org/10.1134/S0040579512040100

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  • DOI: https://doi.org/10.1134/S0040579512040100

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