Furnace Refractory Lining

High temperature industrial furnaces play an important role in metallurgy, chemical industry, building materials and other fields. Therefore, it is very important to choose the right furnace lining material. The refractory material of the furnace lining directly affects the performance and service life of the furnace.

Refractory Lining in Furnace

Refractory Bricks

High alumina bricks: high alumina content, high refractoriness, good erosion resistance.
Silica bricks: the main component is silica, strong acid erosion resistance.
Magnesium bricks: high magnesium oxide content, strong alkali erosion resistance.

Amorphous Refractory Materials

Refractory castables: composed of refractory aggregates, powders, binders and admixtures. It can be cast and molded as needed.
Refractory plastics: it has a certain plasticity. It can be molded by ramming or extrusion.
Refractory fiber: light weight, low thermal conductivity. It is suitable for thermal insulation.

Selection of Refractory for Different Types of Furnace Lining

Customers need to choose suitable furnace lining material according to the specific process and use requirements of different high-temperature industrial kilns. The following are some common lining of furnaces’ refractory material choices.

• Iron and steel metallurgical kilns: such as blast furnaces, converters, electric furnaces, etc., the lining materials need to have high temperature resistance, corrosion resistance and wear resistance. High alumina bricks, magnesia bricks and refractory castables are common choices.
• Cement rotary kiln: the temperature in the kiln is high and there is erosion by alkaline substances. Therefore, it needs to choose refractory materials with good alkalinity resistance. Such as magnesia bricks and spinel bricks.

• Glass melting furnace: the temperature of the glass melting furnace is high and the glass liquid has an erosive effect on the refractory material. Silica bricks and sintered corundum bricks are used for the lining of this kiln.
• Ceramic kiln: the temperature of the ceramic kiln varies greatly and refractory lining in furnace with good thermal stability need to be selected. Such as cordierite bricks and mullite bricks.

In the End

When choosing refractory materials, you need to consider factors such as the type of kiln, operating temperature and chemical environment. It is important that you choose refractories based on their performance characteristics. In addition, you should also pay attention to the construction and maintenance of the furnace lining. Reasonable selection and use of refractory materials can improve the production efficiency of the furnace and reduce costs.