Is magnesium oxide a refractory material?

MgO is prized as a refractory material, i.e. a solid that is physically and chemically stable at high temperatures. It has two useful attributes: high thermal conductivity and low electrical conductivity.

Why Magnesium oxide is used as a refractory material?

Magnesium oxide is used to make linings for some furnaces. It is known as a refractory material – which just means that it is resistant to heat. Magnesium oxide has a high melting point (2852°C) and so resists the high temperatures in a furnace.

What are magnesium bricks used for?

Magnesia-Carbon Brick: Mag-carbon bricks are used in basic oxygen converters, electric furnaces, and steel ladles.

What is an example of refractory?

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 meant 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.

What is a refractory mineral?

Refractory minerals can be defined as minerals or synthetic inorganic crystal phases that have high melting points. They should also be resistant to deformation and to softening at high temperatures.

What is high alumina bricks?

High Alumina Bricks are produced with select bauxite chamotte as main raw material, fired at 1450-1470 °C by advanced process with strict quality control. High Alumina bricks are extensively used in mining, metallurgy, cement, and chemical, refinery and refractory industries.

What is dolomite bricks?

Dolomite brick is made as refractory products from calcined dolomite sand. Generally dolomite bricks has more than 40% CaO, more than 35% MgO and some SiO2, Al2O3, Fe2O3 and some other impurities. If the ratio of CaO/MgO is less than 1.39, it will be called magnesia dolomite refractory brick.

What is the purpose of refractory lining?

One particular refractory product to consider is the refractory lining, which is a protective layer inside the kiln or furnace that acts as a form of insulation to withstand high temperatures. It can also protect the structure from thermal shocks, abrasion and chemical attack.

What is refractory conduct?

Showing or characterized by obstinate resistance to authority or control: refractory children; refractory behavior. 2. Difficult to melt or work; resistant to heat: a refractory material such as silica. 3. Resistant to treatment: a refractory case of acne.

What kind of bricks are in a magnesia refractory?

Magnesia brick refractories include four families of compositions and have dead-burned magnesite (MgO) as their starting component. Burned magnesite and magnesite-carbon brick feature very high magnesia contents.

How is magnesium oxide used in steel refractories?

Monolithic gunnables, rammables, castables, spinel formulations, and magnesia carbon based refractory bricks, all formulated using magnesium oxide (MgO), are widely used for basic steel refractory linings. These products are also used in ferroalloy, non-ferrous, glass and ceramic kiln applications.

What are the advantages of a magnesite refractorie?

Magnesite refractories are containing at least 85% magnesium oxide and one of the most widely used basic refractory bricks. Their main advantage is very high slag resistance to lime and iron rich slags. It is very important for steelmaking processes.

Which is better, burnt magnesia or fused magnesia?

Fused magnesia outperforms dead burned magnesia in corrosion and abrasion resistance, strength and chemical stability. Magnesia-Carbon bricks are un-fired refractory products.