What is basic refractory material?
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Refractory material is a material that is resistant to decomposition of heat, pressure or chemical attack and retains strength and form temperatures. The basic refractory materials include alumina, silica, magnesia and lime.
Is the most common form of refractory material?
Firebrick is the most common form of refractory material used extensively in the construction of small furnaces. Other refractories which are used in furnace construction are high alumina brick, silica brick, magnesite brick, chromite brick, zirconia brick, monolithics etc.
What is refractories and its classification?
Refractories are classified according to their physical form. These are the shaped and unshaped refractories. The shaped is commonly known as refractory bricks and the unshaped as monolithic refractories. Shaped refractories are those which have fixed shapes when delivered to the user.
What is the difference between a ceramic and refractory?
Firing, as described in the article traditional ceramics, induces partial vitrification, or glass formation, which is a liquid-sintering process that binds particles together. Nonclay-based refractories, on the other hand, are bonded using techniques reserved for advanced ceramic materials.
What are the three classification of refractories?
Accordingly to this classification, refractories are of three types namely (i) acid refractories, (ii) basic refractories, and (iii) neutral refractories. Also there are some special types of refractories. Acid refractories – These refractories are attacked by alkalis (basic slags).
What are the characteristics of refractory materials?
The Physical and Chemical Properties of Refractory Metals
- The Physical Properties of Refractory Metals.
- The Chemical Properties of Refractory Metals.
- A Very High Melting Point.
- High Strength.
- Outstanding Abrasion and Wear Resistance.
- Excellent Corrosion Resistance.
- Thermal Shock Resistance.
- Heat and Electrical Conduction.
What is fireclay refractory?
Fireclay refractory bricks are manufactured from unfired refractory bond clay and fireclays (chamotte), fired refractory clay or similar grog materials . Fireclay refractory bricks have two main components namely 18 % to 44 % of alumina (Al2O3) and 50 % to 80 % of silica (SiO2).
What are the different types of refractory bricks?
Various refractory bricks in different sizes and shapes are now available for diverse applications. The typical refractory materials include fireclay refractories, high alumina refractories, silica brick, Magnesite refractories, Chromite refractories, Zirconia refractories, Insulating materials and Monolithic refractory.
What are the functional refractory materials?
Functional refractory materials are fired or non-fired refractory materials that are mixed with granulated and powdered refractory raw materials and binders to form a certain shape and have specific smelting applications. 6. Clay Bricks
What is a monolithic refractory?
Monolithic refractory, the name generally given to all unshaped refractory products, are materials installed as some form of suspension that ultimately harden to form a solid mass. Monolithic refractories are replacing the conventional type fired refractories at a much faster rate in many applications including those of industrial furnaces.
What is non-fired refractory?
Non-fired refractory products are refractory materials that are made of granular, powdered refractory materials and suitable binders but are directly used without being fired. 3. Special Refractory