REDUCING THE CAKING OF SODIUM METASILICATES WITH VARIABLE DEGREES OF HYDRATION

UDC 691.57

 

Lukash Elena Vatslavovna – PhD (Engineering), Associate Professor, Assistant Professor, the Department of Chemical Technology of Binding Materials. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: ellukash@belstu.by

Kuzmenkov Mikhail Ivanovich – DSc (Engineering), Professor, Professor, the Department of Chemical Techno-logy of Binding Materials. Belarusian State Technological University (13a, Sverdlova str., Minsk, 220006, Republic of Belarus). E-mail: kuzmenkov.bgtu@mail.ru

Shalukho Natalia Mikhailovna – PhD (Engineering), Associate Professor, Assistant Professor, the Department of Chemical Technology of Binding Materials. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: shalukho@belstu.by

Kuzmenkov Dmitry Mikhailovich – PhD (Engineering), Senior Lecturer, the Department of Life Safety. Belarusian State Technological University (13a, Sverdlova str., 220006, Minsk, Republic of Belarus). E-mail: 310_chtvm@mail.ru

Yatsenko Elena Alfredovna – DSc (Engineering), Professor, Head of the Department of General Chemistry and Silicate Technology. South-Russian State Polytechnic University (132, Prosvescheniya str., Novocherkassk, Rostov region, 346428, Russian Federation). E-mail: yatsenko@mail.ru

 

DOI: https://doi.org/ 10.52065/2520-2669-2024-283-12.

Key words: sodium metasilicate, finishing, hygroscopicity, caking, friability.

For citation: Lukash E. V., Kuzmenkov M. I., Shalukho N. M., Kuzmenkov D. M., Yatsenko E. A. Reducing the caking of sodium metasilicates with variable degrees of hydration. Proceedings of BSTU, issue 2, Chemical Engineering, Biotechnologies, Geoecology, 2024, no. 2 (283), pp. 98–105 (In Russian). DOI: 10.52065/2520-2669-2024-283-12.

Abstract

The work analyzes the literature and patent sources in the field of methods for reducing tracking in the production of granular or finely dispersed materials prone to moisture absorption from the air. The methods of reducing the traceability of sodium metasilicates are presented, the main consumer properties (hygroscopicity, traceability, friability, dissolution time) of anhydrous sodium metasilicate synthesized at the Department of Chemical Technology of binders are studied, and its comparative characteristics with water-soluble forms of sodium metasilicate of domestic and foreign production are carried out. It has been established that treating the surface of synthesized anhydrous sodium metasilicate with various anti-caking materials can significantly reduce hygroscopicity, caking and friability. It was noted that the highest caking rates are observed in 9-hydrate sodium metasilicate produced by OJSC “Domanovsky Production and Trade Plant” (35,25 wt. %), the lowest caking properties are in anhydrous granular sodium metasilicate (Belgium, SILMACO) – 1,98 wt. %. The influence of various anti-caking materials (sodium stearate, potassium stearate, tar soap, rapeseed oil) on the hygroscopicity, caking and friability of sodium meta-silicates was studied. It was found that sodium stearate provided the best performance in terms of caking and friability. All studied coupling agents made it possible to reduce the hygroscopicity of sodium metasilicates by 3–19 wt. %. By the method of IR spectral analysis, it was found that the use of a solution of sodium stearate with a concentration of 1 wt. % as an anti-tracking agent does not lead to chemical interaction

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25.03.2024