Institute of Mineralogy, Ural Branch of RAS (Russia):

Nasyrov R. Sh., Leading Reseacher, roudolf@ilmeny.ac.ru

By the results of quartz deposits formation conditions analysis, and taking into account physicochemical properties of quartz and impurity mineral inclusions, a necessity of crushed quartz grinding without calcination is established. Effect of crushed quartz grinding operation was studied with regard to changes in mineral inclusions concentration in different size fractions of powders. It has been established, that fine size fraction of granulated quartz powders increases impurity mineral inclusions content due to their preferential grinding, while fine size fraction of veined quartz is cleaned owing to liquid-gas inclusion (LGI) elimination. Considering physical-mechanical properties of quartz, as well as LGI composition and formation conditions, it is proposed to accomplish their elimination operation from powders by means of microwave electromagnetic decrepitation (MED). MED increases decrepitation effect of certain types of quartz powders to 55 %, decreases the operation duration time by an order and over, also decreasing power inputs and high temperature equipment costs. To solve the problem of mineral and man-caused inclusions removal from quartz powders, a method of their thermal agglomeration with quarts compounds and subsequent removal from concentrate product through sizing has been developed. The method has been proved by comparison of results, obtained in concentration through multi-stage flotation, and achieved in single agglomeration of the same powders from granulated and veined quartz. High efficiency of inclusions removal by agglomeration is shown. Qualitative validation of highpurity quartz powder production is accomplished through comparison of optical characteristics of quartz glass, melted from raw materials, produced by the conventional and newly developed technologies.

1. Karaseva O. N., Pivovarov S. A., Lakshtanov L. Z., Ivanova L. I. Issledovaniye izmeneniya udelnoy poverhnosti gidrookisi zheleza [III] v protsesse perekristallizatsii (Research of change of ferrous hydroxide [III] specific surface in recrystallization process), Materialy XV Rossiyskogo soveshchaniya po eksperimentalnoy mineralogii (Syktyvkar, 22–24 June 2005) (Proceedings of XV Russian experimental mineralogy conference (Syktyvkar, June 22–24, 2005)), Syktyvkar, Geoprint, 2005, p. 370.

2. Lugovskaya I. G. Ispolzovaniye kompleksnykh mineralogicheskikh metodov pri izuchenii tekhnologicheskikh svoystv zhelezomargantsevykh okeanicheskikh rud (Use of multimeter mineralogical methods for ferriferrous manganese ocean ores processing characteristics study), Ibidem, pp. 481–483.

3. Nefedov Yu. A., Anelok L. I., Kilesso S. N., Kryukov Ye. V. Geologiya i poleznyye iskopayemyye Mirovogo okeana — Geology and Mineral Resources of the World Ocean, 2005, No. 1, pp. 51–55.

4. Anufriyeva S. I., Sokolova V. N., Ozhogin D. O. Eksperimentalnoye issledovaniye sorbtsionnykh materialov na osnove okeanicheskikh zhelezomargantsevykh korok (Sorbtion materials experimental research on basis of ocean ferriferrous manganese incrustations), Materialy XV Rossiyskogo soveshchaniya po eksperimentalnoy mineralogii (Syktyvkar, 22–24 June 2005) (Proceedings of XV Russian experimental mineralogy conference (Syktyvkar, June 22–24, 2005)), Syktyvkar, Geoprint, 2005, pp. 447–448.

5. Nasyrov R. Sh. Steklo i keramika — Glass and Ceramics, 2009, No. 5, pp. 37–39.

6. Kreysberg V. A., Danchevskaya M. N., Garkovenko L. G., Rakcheev V. P., Spivakov N. Ya. Issledovaniye gazovo-zhidkikh primesey v prirodnom kvartsevom syr'ye mass-spektrometricheskim kineticheskim metodom (Reseach of gas-and-liquid admixtures in natural quartz raw material by mass-spectrometric kinetic technique), Tezisy dokladov soveshchaniya «Mineralogiya kvartsa» (Syktyvkar, 17–19 November 1992) (Theses of conference «Quartz Mineralogy» (Syktyvkar, November 17–19, 1992)), Syktyvkar, 1992, p. 119.

7. Nasyrov R. Sh. Obogashchenie Rud, 2009, No. 2, pp. 26–27.

8. Danilevskaya L. A., Skamnitskaya L. S., Shchiptsov V. V. Kvartsevoye syr'ye Karelii (Karelia quartz raw material), Petrozavodsk, KarRC RAS, 2004, 226 p.

9. Smolyaninov N. A. Prakticheskoye rukovodstvo po mineralogii (Mineralogy practical guidance), Moscow, Nedra, 1972, 357 p.

10. Kobranova V. N. Petrofizika (Petrophysics), Moscow, Nedra, 1986, 392 p.