What kind of refractory material should be used in boilers? Should we choose refractory castables or refractory bricks? What is the difference between refractory castables and refractory bricks for boilers?
Boilers are common thermal equipment used in many industries such as metallurgy, electricity, and building materials to provide heat sources. Different industries choose different types of boilers. Regardless of the type of boiler, it needs to provide heat sources for recycling by burning materials. The boiler lining needs wear-resistant refractory materials. Whether it is refractory bricks or refractory castables, it needs to meet the use requirements of the boiler lining.
Refractory castables are a kind of amorphous refractory materials. They are a kind of granular material composed of refractory aggregates, refractory powders, binders, additives and other refractory raw materials after mixing. When used, add appropriate water, stir according to requirements, and then pour into the installed mold. After curing, baking, demoulding and other processes, it is put into use.
Refractory castables can produce suitable casting materials according to the application parts of the boiler. By selecting high-quality refractory raw materials, refractory castables of various materials can be processed, such as high-aluminum castables, mullite castables, corundum refractory castables, etc.
Wear-resistant refractory castables for boilers are generally high-aluminum wear-resistant castables and corundum wear-resistant castables. The appropriate refractory castables can be selected for casting lining according to the requirements of the use site.
Refractory bricks are the main refractory materials used in industrial kilns. Refractory bricks can be selected according to the requirements of the use site. Several high-quality refractory aggregates are used as the main refractory raw materials, and powder, binder, etc. are added. After stirring, pressing and forming, drying, and then sent to the high-temperature kiln for firing. Refractory bricks can be designed with a variety of brick types according to the masonry site, and refractory mud is used to bond the refractory bricks together. Refractory bricks can be built according to the required thickness.
Refractory bricks for boilers also need to follow the principles of wear resistance, erosion resistance, thermal shock resistance, etc., and need to have high temperature performance to resist the long-term scouring and erosion of materials and airflow placed in the boiler.
The advantages of boiler refractory castables are short production cycle, easy construction, can be cast according to the construction site, and can be cast according to construction requirements, but the construction process is more important, and the quality of construction is closely related to the long-term use of the lining cast by the boiler refractory castable.
The advantages of boiler refractory bricks are convenient masonry, good integrity of the masonry lining, and the refractory raw materials are fully integrated during the firing process. The fired refractory bricks are better able to resist the erosion of slag. However, the requirements for boiler refractory bricks are high, and the price of refractory bricks is relatively expensive.
From the difference between refractory castables and refractory bricks, it is better to choose refractory castables for boiler refractory materials in the long run.
