Table of Contents
What are monolithic refractory products?
Monolithic refractories are special mixes or blends of dry granular or cohesive plastic materials used to form virtually joint free linings. They are unshaped refractory products which are installed as some form of suspension that ultimately harden to form a solid mass.
Are also known as monolithic refractories?
Monolithic refractory is the term normally used to refer all unshaped refractory products. The word “monolithic” is derived from the word monolith meaning “big stone.” These are materials that are incorporated into some form of suspension that eventually harden to form a solid mass.
What is refractory PPT?
2. 2 Introduction Refractory is any material which can withstand high temperature, without softening or suffering a deformation in shape. Main Objective 1. To confine heat e.g. to resist loss of heat. 2.
What is plastic refractory?
Plastic refractories are supplied in an unfired and formable condition. They are installed by hand or with the use of a pneumatic hammer to form the refractory mass. These products are used both for original installations and for patching.
What is the refractory industry?
Refractories are ceramic materials that are essential for all high-temperature industrial processes because they provide mechanical strength, protection against corrosion, and thermal insulation.
What is meant by refractoriness?
1 : resisting control or authority : stubborn, unmanageable. 2a : resistant to treatment or cure a refractory lesion. b : unresponsive to stimulus. c : immune, insusceptible after recovery they were refractory to infection. 3 : difficult to fuse, corrode, or draw out especially : capable of enduring high temperature.
What is refractory and give example?
The definition of refractory is stubborn or hard to manage, or heat resistant. An example of someone who is refractory is a person who refuses to listen to the rules. An example of something refractory is a material like silica or alumina that are difficult to melt.
What is moldable refractory?
A refractory plastic mouldable with excellent adhesion which is primarily designed for rapid repairs to brick and monolithic linings that can be installed using pneumatic hammer or hand rammed.
What is refractory in a boiler?
Boiler refractory is heat-resistant materials that are used to line the boiler to help it retain heat. This prevents thermal loss during boiler operation. It also helps the boiler retain heat even when it is not firing.
How is refractory material made?
What Are Refractories Made Of? Refractories are produced from natural and synthetic materials, usually nonmetallic, or combinations of compounds and minerals such as alumina, fireclays, bauxite, chromite, dolomite, magnesite, silicon carbide, and zirconia.
What is refractory impurity?
Refractories are materials that are resistant to high temperature, used predominantly as furnace linings for elevated temperature materials processing and other applications in which thermomechanical properties are critical. From: Comprehensive Composite Materials, 2000.
What is neutral refractory?
i. A refractory that is neither strongly basic nor strongly acid, such as chrome, mullite, or carbon.
What is a monolithic refractory?
Monolithic refractory is the name normally given to all unshaped refractory products, the word monolithic coming from the word monolith meaning ‘big stone’. Monolithic refractories are special mixes or blends of dry granular or cohesive plastic materials used to form virtually joint free linings.
What is the back lining of a refractory building made of?
4Waterproof the back lining Most of monolithic refractory structures consist of multi-layered linings. The back lining is normally the insulation castable, the insulation board or the insulation brick. This back lining is installed at first and then the front lining is installed.
What is alumina refractory?
Alumina refractories carry the all purpose characteristics of fire-clay brick into higher temperature ranges that makes it suitable for lining furnace operating up to 3350°F. It has a high resistance in oxidizing and reducing atmosphere and is extensively used in heat processing industries. 12.
What is the function of an insulating refractory?
INSULATING REFRACTORIES • To optimize the energy use and to prevent its escape into the ambience, special materials called insulating refractories are necessary. The function of insulating refractory is to reduce the rate of heat flow (heat loss) through the walls of furnaces.