Physico-сhemical nanomaterials science
Optimization of the drying devices functioning in the process of forming the ammonium nitrate's nanoporous structure 
N.O. Artyukhova1, J. Krmela2, A.E. Artyukhov1, I.I. Volk1, D. Ospanov3
1Sumy State University, Rymskogo-Korsakova str., 2, Sumy, 40007, Ukraine. 
E-mail: n.artyukhova@pohnp.sumdu.edu.ua 
2Alexander Dubcek University of Trencin, 491/30, I. Krasku, 02001, Puchov, Slovak Republic
3Saken Seifullin Kazakh Agrotechnical University, Zhengis Ave 62, 010000, Nur-Sultan, Kazakhstan

The formation of nanopores in the volume of a granule of porous ammonium nitrate is a multistage process and is subject to the influence of many factors. At each stage (including the stage of dehydration at the stage of granulation, and final drying), the technological parameters of the implementation of the nanopore formation process and the design of the main technological equipment are subject to a detailed study.
In this paper, ways to optimize the operation of multistage shelf dryers with vertical sectioning of the working space due to the rational design of the shelves and the number of stages of contact with the drying agent are proposed.
Based on the research results, an algorithm for determining the optimal drying time, which would provide the necessary quantitative characteristics of the nanoporous structure and specific parameters of the PAS characteristic of the components of bulk industrial explosives was proposed.

This work was carried out under the project "Technological bases of multistage convective drying in small-sized devices with utilization and heat recovery units," project No. 0120U100476.

1.	Artyukhova N.O. Multistage finish drying of the N4HNO3 porous granules as a factor for nanoporous structure quality improvement // Journal of Nano- and Electronic Physics. – 2019. – 10 (3), P. 03030-1-03030-5 (2018).
2.	Artyukhova N.O, Krmela J. Nanoporous structure of the ammonium nitrate granules at the final drying: The effect of the dryer operation mode // Journal of Nano- and Electronic Physics. – 2019. – 11(4). – P. 04006-1-04006-4.