THE STUDY OF DEHYDRATION OF COLEMANITE IN NON-ISOTHERMAL CONDITIONS-Reference-Cited by-同舟云学术

THE STUDY OF DEHYDRATION OF COLEMANITE IN NON-ISOTHERMAL CONDITIONS

Published:2021-04-09 Issue:3 Volume:6 Page:97-106
ISSN:2071-7318
Container-title:Bulletin of Belgorod State Technological University named after. V. G. Shukhov
language:en
Short-container-title:

Author:

Bessmertnyy V.¹²³,Bondarenko M.⁴,Puchka O.¹,Cherkasov A.¹,Izotova I.¹,Bragina V.¹,Platov Y.⁵,Bragina Lyudmila⁶

Affiliation:

1. Belgorod State Technological University named after V.G. Shukhov

2. Belgorod University of Cooperation, Economics and Law

3. Stary Oskol Technological Institute after A. A. Ugarov, National University of Science and Technology “MISiS” branch

4. Belgorodskiy gosudarstvennyy tehnologicheskiy universitet im. V.G. Shuhova

5. Plekhanov Russian University of Economics

6. National Technical University «Kharkov Polytechnic Institute»

Abstract

The regularities of colemanite dehydration under non-isothermal conditions are investigated. It is established that colemanite, supplied to the Russian Federation from Turkey, has calcite in its composition. The chemical composition of colemanite is determined using the X-ray fluorescence analysis method. It is shown that the processes of dehydration of colemanite under non-isothermal conditions at a heating rate of 10 °С / min are accompanied by two endothermic effects at 660,7 K and 675,7 K with a total mass loss of 17,3 %. The rate of mass loss of colemanite from the temperature at heating up to 773 K, at which colemanite dehydrates and passes into the amorphous phase, is also studied. The regularities of changes in the rate of dehydration of colemanite are established. It is shown that the maximum values of the dehydration rate of colemanite are observed in the temperature range of 653–678 K. The activation energy of colemanite dehydration is determined to be 86,000 J/mol. Based on the experimentally obtained data, the rate constant of the colemanite dehydration process is calculated. The process of dehydration of colemanite is adequately described by the formal equation of kinetics. Most of the kinetic curve is adequately described by the resulting kinetic equation. It is proposed to describe the mechanism of dehydration of colemanite by a two-stage process, accompanied at the first stage by the removal of crystallization water, and at the second stage-by the removal of hydroxyl groups

Publisher

BSTU named after V.G. Shukhov

Subject

Psychiatry and Mental health,Neuropsychology and Physiological Psychology

Reference25 articles.

1. Жерновая Н.Ф., Дороганов Е.А., Бессмертный В.С., Дорохова Е.С., Жерновой Ф.Е. Стеклокерамический композит с мультифункциональной колеманитной добавкой // Перспективные материалы. 2016. №5. С. 51–58., Zhernovaya N.F., Doroganov E.A., Bessmertny V.S., Dorokhova E.S., Zhernovoy F.E. Glass-ceramic composite with multifunctional colemanite additive [Steklokeramicheskiy kompozit s mul'tifunktsional'noy kolemanitnoy dobavkoy]. Perspective materials. 2016. No. 5. Pp. 51–58. (rus)

2. Жерновая Н.Ф., Бессмертный В.С., Жерновой Ф.Е., Дорохова Е.С., Изотова И.А. Безусадочный облицовочный материал на основе стеклобоя и колеманита // Стекло и керамика. 2016. №3. С. 34–37., Zhernovaya N.F., Bessmertny V.S., Zhernovoy F.E., Dorokhova E.S., Izotova I.A. Non-shrink facing material based on cullet and colemanite [Bezusadochnyy oblitsovochnyy material na osnove stekloboya i kolemanita]. Glass and Ceramics. 2016. No. 3. Pp. 34–37. (rus)

3. Дорохова Е.С., Жерновая Н.Ф., Бессмертный В.С., Жерновой Ф.Е., Тарасова Е.Е. Управление структурой пористого стеклокерамического материала // Стекло и керамика. 2017. №3. С. 28–31., Dorokhova E.S., Zhernovaya N.F., Bessmertny V.S., Zhernovoy F.E., Tarasova E.E. Management of the structure of a porous glass-ceramic material [Upravlenie strukturoy poristogo steklokeramicheskogo materiala]. Glass and Ceramics. 2017. No. 3. Pp. 28–31. (rus)

4. Гулоян Ю.А. Технология стекла и стеклоизделий // Владимир: Транзит-ИКС, 2015. 710 с., Guloyan Yu.A. Technology of glass and glass products [Tekhnologiya stekla i stekloizdeliy]. Vladimir: TRANZIT-IKS, 2015. 710 p. (rus)

5. Павлюкевич Ю.Г., Левицкий И.А., Мазура Н.В. Использование колеманита в производстве стеклянного волокна // Стекло и керамика. 2009. №10. С. 9–13., Pavlyukevich Y.G., Levitsky I.A., Mazur N.In. The use of colemanite in the production of glass fiber [Ispol'zovanie kolemanita v proizvodstve steklyannogo volokna]. Glass and ceramics. 2009. No. 10. Pp. 9–13. (rus)