Study of Thermal Performance of Modern Design of the Drum-type Batch Furnace

The report focuses on the layout and features of the thermal performance of the drum-type batch furnace for heating of metal products for hardening. Technical characteristics of the furnace, some results of the thermomechanical calculation are given. The computer simulation of the processes of gas flow and heat exchange in the furnace is presented. The study has been carried out using the CAE-system (CAE, Computer Aided Engineering)—the software module ANSYS Fluent. In this module, the flow boundary conditions were specified. To check the repeatability of calculations, the control of current values and calculated temperature discrepancies has been used. The results of the simulation are presented graphically and contain a visualization of the field of temperature and velocity distribution, as well as a vector distribution of  gas flow rates. The obtained results of the computer simulation allowed evaluating the efficiency of the thermal and gas-dynamic performance of the developed design of the drum-type batch furnace with a constant temperature of the operating space. The developed design of the furnace for heating of metal billets with moving of billets in the furnace along the drum allows solving of some problems of resource and energy saving; it could also be used for heat treatment of bars, pipes, strip, and bar sections of various shapes. Keywords: batch furnace with a constant temperature of operating space, recuperative burner, computer simulation, temperature fields, velocity fields, resource saving, burning, heat exchang

Особенности конструкции термической печи с барабанным механизмом перемещения заготовок

One of the most energy-intensive industries is ferrous metallurgy. The metallurgical sector in industrially developed countries is reducing its specific energy consumption per one ton of products by approximately 1.0 - 1.5 % per annum. In Russia, obsolete technology is the main reason for the high-energy intensity of industrial product. Energy saving in industrial production is associated with production technology and the scope of fuel and energy resources consumption. Therefore, ways to improve energy efficiency focus on reducing energy consumption of any kind during a specific process in a specific process or thermal unit. Ensuring the economical operation of furnace units requires detailed preliminary and verification analyses, upgrading and introduction of state-of-the-art equipment. The study presents a flow diagram and features of thermal operation of a new drum-type chamber furnace for heating metal products for quenching. The technical parameters of the furnace, the results of the thermo-technical analysis, the heat balance and the specific fuel consumption as applicable to the created design are also presented. The flow diagram of the furnace has significant advantages in terms of the energy efficiency of fuel as compared to the roller and conveyor methods of metal transportation. Placing blanks on the drum significantly reduces the complexity of their transportation. Thanks to its small length the proposed design is compact and easy to place in a workshop. The use of a recuperative fuel burning device allows the efficient use of the heat of waste gases in the heating process. The proposed design and method of products transportation in the furnace working space can be used for the heat treatment of bars, pipes, strips, as well as rolled steel of various shapes. © 2021 National University of Science and Technology MISIS. All rights reserved

Analys of the methodical pepper on Chelyabinsk Pipe Plant for heating storage

The paper considers the heat work of the heating furnace located at the Chelyabinsk Pipe Rolling Plant. The resulted heat balance of the existing heating furnace, as a result of the analysis, revealed shortcomings in the work of the furnace. Measures have been proposed to eliminate the identified shortcomings.В работе рассмотрена тепловая работа нагревательной печи ТПЦ № 1 ОАО «ЧТПЗ». Приведен тепловой баланс существующей конструкции нагревательной печи, в результате анализа которого выявлены недостатки в ее работе. Кроме того, предложены мероприятия для устранения выявленных недостатков. Приведены ожидаемые результаты проведения реконструкции систем и способа транспортировки металла

The improving of the construction of chamber furnace

A scheme of new design and features of the thermal operation of a drum-type chamber furnace for heating metal products for quenching and tempering are presented. The technical characteristics of the furnace, the results of heat engineering calculation are given.Представлены схема новой конструкции и особенности тепловой работы камерной печи барабанного типа для нагрева металлических изделий под закалку и отпуск. Приведены технические характеристики печи, результаты теплотехнического расчета

RESOURCE AND ENERGY SAVING IN A DRUM CONTINUOUS FURNACE FOR HEATING ROLLED UNDER QUENCHING AND TEMPERING

Тhe principle of operation of a rotary kiln with consideration of resource and energy saving describes at this article. A schematic diagram of the device is presented. Technical characteristics of the furnace are applied.Изложен принцип работы барабанной печи с учетом ресурсо- и энергосбережения. Представлена принципиальная схема устройства. Приводятся технические характеристики печи

ANALYSIS OF RING FURNACE FOR HEATING BILLETS ON CHELYABINSK PIPE ROLLING PLANT

This article considers the analysis of thermal performance annular heating furnace located at the Chelyabinsk Pipe Rolling Plant. There are problems arising from the operation of the furnace, given the purpose of the reconstruction of its systems and components. During the analysis of the existing system identified and suggestions for solving these drawbacks.В работе произведен анализ тепловой работы кольцевой печи для нагрева трубных заготовок ОАО «ЧТПЗ». Проанализированы проблемы, возникающие при работе печи. В ходе анализа выявлены недостатки существующей системы утилизации тепла и предложены мероприятия для решения данных недостатков. Приведены ожидаемые результаты проведения реконструкции печных систем и узлов

Study of the thermal work of the modern construction of a drum-type chamber furnace

The master's thesis is devoted to the design development, the calculation of the thermal and gas-dynamic modes of operation of a furnace furnace of the baraban type, designed to heat metal products before quenching. In the course of work, heat engineering calculations were carried out for a new drum-type furnace design, the heat balance of the furnace was obtained, and computer simulation of gas dynamics in the working space of the chamber furnace was carried out in the Ansys Fluent software module. The results of the work can be used in the performance of research and development work at metallurgical enterprises, as well as in the educational process for training bachelors and undergraduates in the direction of “Metallurgy” (bachelor’s and master’s level).Магистерская диссертация посвящена разработке конструкции, расчету теплового и газодинамического режимов работы камерной печи барабанного типа, предназначенной для нагрева металлических изделий перед закалкой. В ходе работы проведены теплотехнические расчеты для новой конструкции печи барабанного типа, получен тепловой баланс печи, в программном модуле Ansys Fluent проведено компьютерное моделирование газодинамики в рабочем пространстве камерной печи. Результаты работы могут быть использованы при выполнении научно-исследовательских работ на металлургических предприятиях, а также в учебном процессе для обучения бакалавров и магистрантов по направлению «Металлургия» (уровень бакалавриата и магистратуры)

Investigating the thermal work and construction of annular furnace on “chelyabinsk pipe-rolling plant” pjsc to improve heat technical indicators of its work

High performance of rolling and tube rolling mills, good quality of finished metal products can be obtained by heating metal billets with minimal oxidation and decarburization in heating furnaces. Such conditions can be provided by annular furnaces, which are widely used in the rolling production of pipes, railway wheels and tires. High-quality heating allows us to obtain the structure of metal products with given thermal and working properties, as well as the plasticity necessary for subsequent mechanical processing. In this paper, we consider thermal engineering features of the operation of an annular furnace for heaŧing billets before rolling at “Chelyabinsk Tube Rolling Plant” PJSC (ChTPZ). The problems arising during the operation of thermal unit were analyzed: High specific fuel consumption for billets heating; high temperatures of walls external surfaces and roof external surfaces; low heating rate of the billet; large amount of air leaks into the furnace working space. Also design of gas-burning devices does not provide the possibility of regulating gas supply in a large range of loads, up to a periodic complete shutdown. And thermal energy of waste gases is practically not used. Metal heating has been analyzed and annular furnace heat balance has been compiled. Analysis of the results of computational studies has revealed factors that reduce energy efficiency of the existing furnace design. The measures were proposed for its modernization in order to reduce fuel consumption and to increase productivity (use of fibrous refractory materials, regenerative burners, non-water-cooled partitions, etc.). To assess impact of the proposed measures, the furnace heat balance after its systems reconstruction and assembly has been compiled, the main indicators of the furnace heat operation have been determined. When implementing proposed measures, significant economic effect is expected, including improvement in quality of metal heating while reducing fuel consumption and increasing productivity of the unit. In particular, after furnace reconstruction it is expected to increase the total (by 18.1 %) and heat (by 31.0 %) efficiency of the furnace, and to decrease (to 48.3 kg conditional fuel/ton) specific fuel consumption. © 2019, National University of Science and Technology MISIS. All rights reserved

Magnetite Nanocrystals with a High Magnetic Anisotropy Constant due to the Particle Shape

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