Abstract
A mathematical model of heating and melting sequences of thermo-massive slabs (fl at steel briquettes) with variable thermal and physical properties (TPP) at boundary conditions of genus III, was formulated. Setting the genus III boundary conditions allows to analyze the impact of the external heat exchange coefficients of briquette melting processes.The calculation technique for solving the stated problem is the equivalent sources method (MES) as applied to a thermal layer scheme. Predictive expressions for slab through-heating (thermal lag stage), heating (ordered stage) time and at the time of melting, were derived. A comparison of solutions was obtained with the MES method and numerical realization of heating and melting the slab with a satisfactory convergence. It was proofed that the obtained mathematical relations may be used in steelmaking practices to perform calculations for lump materials melting in thermal engineering (e.g., when using briquettes in arc-furnaces).
Highlights
Setting the genus III boundary conditions allows to analyze the impact of the external heat exchange coefficients of briquette melting processes.The calculation technique for solving the stated problem is the equivalent sources method (MES) as applied to a thermal layer scheme
It was proofed that the obtained mathematical relations may be used in steelmaking practices to perform calculations for lump materials melting in thermal engineering
При этом термофизическая модель исследуемых процессов теплообмена рассмотрена для схемы термического слоя с разбиением процесса внутреннего теплообмена на три этапа: инерционный; регулярный; период плавления
Summary
Сформулирована математическая модель нагрева и плавления термомассивной плиты (плоского стального брикета) с переменными теплофизическими характеристиками при краевых условиях III рода. Получены расчетные выражения для определения времени прогрева пластины (инерционный этап), нагрева (упорядоченный этап) и на стадии плавления. Выполнено сравнение полученного решения при использовании метода эквивалентных источников и численной реализации поставленной задачи нагрева и плавления пластины, которое показало удовлетворительную сходимость.
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Izvestiya Visshikh Uchebnykh Zavedenii. Chernaya Metallurgiya = Izvestiya. Ferrous Metallurgy
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
