What is a refractory factory?

What is a refractory factory?

Refractories are materials that provide linings for high-temperature furnaces and other processing units. Refractories must be able to withstand physical wear, high temperatures (above 538°C [1000°F]), and corrosion by chemical agents. There are two general classifications of refractories, clay and nonclay.

What is refractory and its 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 industries use refractories?

Refractories are essential protectants for all heat-intensive production processes, including iron and steelmaking, cement production, glass, ceramics, aluminum, and nonferrous metals, paper and pulp, petrochemical processing, power production, and waste incineration.

What is refractories and 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 ceramics and refractories?

Refractories are ceramic materials designed to withstand the very high temperatures (in excess of 1,000°F [538°C]) encountered in modern manufacturing. More heat-resistant than metals, they are used to line the hot surfaces found inside many industrial processes.

What are types of refractories?

Basic refractories

• Magnesite refractories are composed of ≥ 85% magnesium oxide (MgO).
• Dolomite refractories mainly consist of calcium magnesium carbonate.
• Magnesia-chrome refractories mainly consist of magnesium oxide (MgO) and chromium oxide (Cr2O3).

What are the requirements of good refractory?

A good refractory should have low porosity. Thermal spelling is the property of breaking, cracking or peeling off a refractory material under high temperature. This causes uneven expansion and contraction within the mass of a refractory, and leads to development of uneven stresses and strains.

Which of the following is natural refractory?

Explanation: Chromite, along with graphite, is a common neutral refractory material. Chromite has an approximate fusion temperature of 2180oC while that of graphite is 3000oC. Dolomite and magnesia are basic refractories, whereas silica is an acid refractory.

What are the types of refractories?

The typical refractory materials include fireclay refractories, high alumina refractories, silica brick, Magnesite refractories, Chromite refractories, Zirconia refractories, Insulating materials and Monolithic refractory.

Is Clay a refractory material?

Refractory, as a noun, refers to a material that does not melt at normal kiln temperatures (of the industry being referenced). Kiln shelves and firebricks are refractory. Many natural clays and minerals are also refractory. Highly refined materials like alumina oxide and zirconia oxide are super-refractories.

What is refractory equipment?

Refractory is a heat resistant material used to line high temperature furnaces, reactors, and other processing units. Refractories are designed to resist chemical attack, withstand molten metal and slag erosion, thermal shock, physical impact, catalytic heat and similar adverse conditions.