Jul142023 by adminrs

Performance of Refractory Castables

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The binder for mullite and refractory castables is a composite binder, mainly composed of α-Al2O3 and SiO2 fine powder, clay, and hydrated alumina. It is a combination of fine powders and hydrated alumina that bond at low temperatures. At medium to high temperatures, Al2O3 reacts with SiO2 to form mullite, creating a binding material, hence referred to as the binder for mullite and refractory castables. It is well known that using secondary mullite in amorphous refractories is a common technique…
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Jul72023 by adminrs
What kind of castable has a long service life for the kiln mouth of a rotary kiln?

What kind of castable has a long service life for the kiln mouth of a rotary kiln?

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Several years ago, steel fiber corundum castable and high-alumina castable were used for the kiln mouth of the rotary kiln, but the results were not satisfactory. They were prone to cracking and had poor thermal shock resistance, resulting in a short service life and increased costs. Refractory castable is composed of aggregates, powders, binders, additives, water, and other liquid materials. Under high-temperature conditions, it exhibits good sintering performance, volume stability, corrosion resistance, and high-temperature mechanical properties. The refractory lining at…
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Jun292023 by adminrs

24 Common Refractory Raw Materials for Unshaped Refractory Castables

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Refractory castable is a type of refractory material that is composed of a certain gradation of refractory aggregates and powdery materials, combined with binders and additives. It is a class of refractory materials that can be used directly without the need for molding and firing processes. Refractory castables do not require high-temperature firing and can be used directly after construction and curing. They have the advantages of simple production process, energy and labor saving, mechanized construction, good overall integrity, easy…
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