Ways to improve physical and thermal performance of refractory lining materials

Refractory lining materials, which include ceramic refractories and nonfired heat-resistant concretes, have a very short lifespan during the turnaround time measured in years and sometimes months. Therefore, increasing the service life of thermal generating units by 1.5-2 times will bring significan...

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Bibliographic Details
Main Authors: Khlystov, A.I., Vlasova, E.M., Isaev, D.I.
Format: Conference Proceeding
Language:English
Subjects:
Aluminous cements
Aluminum oxide
Ceramic molding materials
Ceramics
Concrete blocks
Fillers
Hardeners
Heat resistant materials
Heat transfer
Mechanical properties
Refractories
Service life
Thermal energy
Thermal resistance
Thermal stability
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Summary:Refractory lining materials, which include ceramic refractories and nonfired heat-resistant concretes, have a very short lifespan during the turnaround time measured in years and sometimes months. Therefore, increasing the service life of thermal generating units by 1.5-2 times will bring significant economic benefits. The main factor that determines the durability of refractory lining materials is the thermal resistance. It is possible to increase the thermal resistance by improving such physical and mechanical properties as strength and density. As for the ceramic refractory performance improvement, such technological methods as their structural and chemical modification by phosphate binder impregnation, as well as introduction of phosphate components into the ceramic batches during the molding process increase, in particular, their thermal stability. The use of aluminous and high-alumina cements contributes to a significant increase of not only strength, but also physical and thermal performance of heat-resistant concretes with different fillers. Switching to the use of chemical binders in the compositions of heat-resistant concretes (liquid glass with effective hardeners; silicate-block and phosphate binders) enables to develop high-heat resistant materials which do not soften in a wide range of heating temperatures from 400 °С to 1600 °С. The positive results on increasing the thermal resistance of heat-resistant composites can be obtained by reinforcing them with high temperature fibers.
ISSN:2261-236X
2274-7214
2261-236X
DOI:10.1051/matecconf/201711700077