What is refractory with examples?

What is refractory with examples?

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 are refractory materials 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 do you mean by refractory material?

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.

Which is a basic refractory?

The basic refractory materials include alumina, silica, magnesia and lime.

Are ceramics refractory?

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 are refractory materials give some examples?

Examples of conducting refractories are SiC and ZrC, whereas examples of nonconducting refractories are silica and alumina. Insulating refractories include calcium silicate materials, kaolin, and zirconia. Insulating refractories are used to reduce the rate of heat loss through furnace walls.

What is the most commonly used refractory material and why?

As fireclay brick is relatively cheap and its raw materials are widespread, it is the most common type of refractory brick and used widely in most furnaces, kilns, stoves, regenerators, etc. Silica brick is a refractory material containing at least 93% SiO2.

What is the best refractory material?

Hafnium carbide is the most refractory binary compound known, with a melting point of 3890 °C. The ternary compound tantalum hafnium carbide has one of the highest melting points of all known compounds (4215 °C).

Is glass a refractory material?

A refractory material is one that has high tolerance of temperature, and at high temperature is resistant to cracking, degradation or other chemical attack. As a prime source of silica(2), ground glass is therefore an acidic refractory material; silica is the most commonly used refractory(3).

Which mineral is used as refractory material?

Periclase (MgO, M.P. 2825°C) is the most important refractory mineral in the metals industry. It can be found in the following refractories: magnesia, chrome-magnesia, forsterite -magnesia, spinel -magnesia, and dead-burned dolomite.

Which one of the following is example for basic refractory material?

Dolomite is a basic refractory material. Silicon carbide is a special type of refractory material.

Is Clay a refractory?

Refractory, as a noun, refers to a material that does not melt at normal kiln temperatures (of the industry being referenced). The term also refers to the capacity a material to withstand heat without deforming or melting. Kiln shelves and firebricks are refractory. Many natural clays and minerals are also refractory.

What is the purpose of refractory material?

Serving as a thermal barrier between a hot medium and the wall of a containing vessel Withstanding physical stresses and preventing erosion of vessel walls due to the hot medium Protecting against corrosion Providing thermal insulation

What is refractory cement?

Refractory cement: it is a kind of additive of castable, the composed of refractory grain and powder of loose cementation refractory material together, make its have certain strength, has good forming performance and operational performance.

What is a boiler refractory?

Boiler Refractory dry out is to ensure proper drying, curing of refractory applied on furnace and other components. The refractory usually undergoes considerable chemical changes, during initial heating.