FINE GRINDING OF OXIDES
Abstract
It has been experimentally shown that a jet mill with an impact into an obstacle has a high degree of grinding and makes it possible to obtain finely dispersed oxide powders with an average of less than 1-2 microns. The obtained dependences of the fineness of the product on the number of impacts make it possible to calculate the circulation load during grinding in a closed cycle and quanti-fy energy costs. The peculiarities of grinding zirconium dioxide, titanium dioxide and calcined alumi-na are given. Based on the kinetics of crushing from the number of impacts, a method for calculating a closed grinding cycle is proposed. Based on it, a pilot industrial plant has been created – a jet mill with an impact into an obstacle, operating in a closed cycle with a passing centrifugal classifier.
References
Barakovskikh D.S., Shishkin S.F. Improving the efficiency of
grinding in an ejector jet mill. Modern high technology. Regional
application. 2022. N 1. P. 54-60. DOI: 10.6060/snt.
0007.
Postnikova I.V., Vorobyov S.V., Kozlov A.M., Kolobov
M.Yu. Separation of products of selective grinding of apatitenepheline
ore. Modern high technology. Regional application.
N 4. P. 96-102. DOI: 10.6060/snt.20237604.00013.
Blinichev V.N., Labutin A.N., Zueva G.A., Kolobov M.Yu.,
Alekseev E.A., Volkova G.V., Vorobyov S.V., Kozlov A.M.,
Kokurina G. N., Lysova M.A., Mironov E.V., Natareev S.V.,
Nevinitsyn V.Yu., Ponomareva Yu, N., Postnikova I.V.,
Sakharov S.E., Chagin O.V. Problems of developing energyand
resource-saving processes, reactor systems and intensive
equipment, modeling and optimal control. ChemChemTech
[Izv. Vyssh. Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2023. T.
Issue. 7. P. 185-202. DOI: 10.6060/ivkkt.20236607. 6845j.
Blinichev V.N., Postnikova I.V., Vorobyev S.V., Kolobov
M.Yu., Zueva G.A. Intensification of the process of destruction
of polycomponent materials. ChemChemTech [Izv. Vyssh.
Uchebn. Zaved. Khim. Khim. Tekhnol.]. 2022. V. 65. N 1. P.
-115. DOI:10.6060/ivkkt.20226501.6357j.
Vorobyov S.V., Kolobov M.Yu., Postnikova I.V., Kozlov
A.M. Cascade jet shredder for selective crushing of apatitenepheline
ore. Ros. Khim. Zh. 2023. T.LXVII. N 2. P. 92-96.
DOI:10.6060/rcj.2023672.11
Vorobyov S.V., Kolobov M.Yu., Postnikova I.V., Kozlov A.M.
Developing Technology for the Destruction of Polyco-mponent
Materials. Russian Journal of General Chemistry. 2024. V. 94, N 6.
P. 1507-1511. DOI: 10.1134 S10703632 24060288Barakovskikh D.S., Shishkin A.S., Shishkin S.F. Grinding
Technologies for Solid Dispersed Materials: Processes and
Equipment. Yekaterinburg: Ural University Press, 2025. 236 p.
ISBN 978-5-7996-3975-4.
Shishkin S.F., Barakovskikh D.S. Jet Mill for Pitch Grinding.
Nonferrous metals. 2013. N 8. P. 37–40.
Abramovich G.N. Applied gas dynamics. In 2 hours. Part 1.
th ed. Moscow: Nauka, 1991. 600 p. – ISBN 5-02-014015-5.
Shishkin A.S., Shishkin S.F. Examples of Calculations for
Aerodynamic Processes in Bulk Material Processing Using Excel:
Electronic Educational Text Edition. Yekaterinburg: Ural
Federal University Information Portal, 2016. 409 p.
Barakovskikh D.S, Shishkin S.F. Particle Motion in the Acceleration
Tube of a Jet Mill at Low Concentrations. Bulletin of
BSTU Named After V. G. Shukhov. 2016. N 4. P. 121–128.
Barakovskikh D.S, Shishkin S.F. Two-Phase Flow Motion in
the Acceleration Tube of a Jet Mill. Bulletin of BSTU Named
After V. G. Shukhov. 2017. N 5. P. 82–88.
Kleiv R.A. Value enhancement of olivine process dust through
air classification. International Journal of Minerals, Metallurgy,
and Materials. 2012. V. 19. Iss. 3. P. 185–191.
Felk A. Fine-Milling and Air Classification of Ceramic Materials
by the Dry Method. Glass and Ceramics. 2014. V. 71. Iss.
P. 92–95.
