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Refractory constructions of energy equipment

Type of study Follow-up Master
Language of instruction English
Code 635-3043/02
Abbreviation ZKEZ
Course title Refractory constructions of energy equipment
Credits 5
Coordinating department Department of Thermal Engineering
Course coordinator prof. Ing. Jozef Vlček, Ph.D.

Subject syllabus

Theoretical part

• Production and technological requirements for linings of furnaces and heating equipment.
• Principles of the use of refractory materials – decision-making point of view at design of lining.
• Analysis of the consumption of refractory materials in various industrial sectors (metallurgy of ferrous and nonferrous metals, chemical industry, glass, construction materials and matters).
• Basic refractories for furnace construction and its characteristics - shape and unshaped construction materials, thermal insulation materials.
• Influence of insulation in the lining, the basic thermo-technical properties of refractory materials (thermal conductivity, specific heat capacity, viscosity, density, bulk density).
• Surface conditions - calculation of the overall heat transfer coefficient on the outside of the lining - the use of criteria equations and equations for radiation heat transfer.
• Thermal work of linings – solving of the temperature field of lining in a time- steady and unsteady state, one-sided heating, heating throughout the volume, continuous and cyclic heating, 1 and 2 Fourier's law, initial and surface conditions.
• Solution unidirectional non-stationary temperature field in an infinite plate and in an infinite cylinder for various marginal conditions (q = const.; tarea = const; tsurf = const.; tsurf = f (time); tarea = f (time), etc.).
• Corrosion effect on the lining and actions to its prevent - study of the interaction between slag and refractory materials (Application of ternary diagrams), a lining cooling.
• Technology of making the linings. Linings of dense shaped material, unshaped building materials, lightweight and fibrous materials. Refractory monolithic linings. Anchoring and hanging of lining.
• Construction of furnace linings energy.
• Lining construction of particular metallurgical aggregates (VP, hot blast, pig iron mixer, converter, tandem furnace, EAF, electric induction furnaces, etc.).
• Lining construction in the secondary metallurgy (ladles, tundish + shielding and immersion tube, equipment vacuum treatment of steel, etc.).
• Lining construction of furnaces in ceramic and glass industry (dryer of matters, chamber furnace, tunnel furnaces, shaft and rotary kilns for firing of raw materials, glass melting furnaces).
• Repair of lining - lining repair technology "cold" and "hot" (shotcreting, slag splashing, slag coating, etc.), ways of increasing the life of a furnaces lining and thermal devices.

Practical part

• Statistical analysis of multivariate data, linear and polynomial regression - using the least squares method for approximating the dependencies.
• Extended use of built-in features of MS Excel - function IF, LOOKUP, INDEX, MATCH, BESSELJ
• Surface conditions - Calculation of the overall heat transfer coefficient on the outside of the lining - the use of criteria equations and equations for radiation heat transfer.
• Solution of temperature field lining - Stationary temperature field one-dimensional (plane wall, cylindrical, spherical). The use of iterative methods.
• Energy Balance - calculating enthalpy linings.
• Solution unidirectional unsteady temperature field in an infinite plate for various boundary conditions (q = const.; tarea = const; tsurf = const.; tsurf = f (time); tarea = f (time), etc.).
• Solution unidirectional unsteady temperature field in an infinite cylinder for various boundary conditions (q = const.; tarea = const; tsurf = const.; tsurf = f (time); tarea = f (time), etc.).
• The calculation procedure of transcendental equations (graphically, numerically), Bessel functions.
• Solution of unsteady temperature field for 3D shapes (cuboid, prism, cylinder).
• Numerical methods (finite difference method).
• Using macros in Excel - View card developer, creating macros, use the controls.
• Basics of programming in VBA - Sub / Function, variable declarations, create your own formulas, creating user forms.
• Excursion blast furnace

E-learning

www.vsb.cz/e-vyuka/cs/subject/635-3043/01

Literature

[1] ROUTSCHKA, G. Refractory materials: Basics – Structures –Properties. 2nd Ed. Essen: Vulkan Verlag, 2004. ISBN 3-8027-3154-9.
[2] TALER, J., DUDA, P. Solving Direct and Inverse Heat Conduction Problems.Springer Verlag Berlin Heidelberg 2006. 889 s. ISBN 978-3-540-33470-5 .
[3] DOMONE, P., ILLSTON, J. Construction Materials: Their Nature and Behaviour. 4st ed. London: Spon Press, 2010. ISBN 978-0-415-46516-8.
[4] SURENDRANATHEN, A., O. An Introduction to Ceramic and Refractories. New York: Taylor & Francis Group, 2015. ISBN 978-1-4822-2044-5.

Advised literature

[1] TALER, J., DUDA, P. Solving Direct and Inverse Heat Conduction Problems. Springer Verlag Berlin Heidelberg 2006. ISBN 978-3-540-33470-5 .
[2] RAMACHANDRAN, V. S., BEAUDOIN, J. J. Handbook of Analytical Techniques in Concrete Science and Technology: Principles, Techniques, and Applications. New York: William Andrew Publishing, 2001. ISBN 0-8155-1437-9.
[3] CALLISTER, D., W., RETHWISCH, D., G. Materials Science and Engineering. John Wiley & Sons. 2015. ISBN 978-1-118-31922-2 .