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Q & A

There are several advantages of using calcium aluminate aggregates in the development of refractory castables. Firstly, calcium aluminate aggregates have excellent high-temperature stability, allowing the castables to withstand extreme temperatures without losing their structural integrity. This is crucial for applications in industries such as steel, cement, and petrochemical, where refractory materials are exposed to intense heat. Secondly, calcium aluminate aggregates have a low thermal conductivity, meaning they are efficient at insulating against heat transfer. This property helps to reduce energy consumption and improve the overall efficiency of the refractory castables. Additionally, calcium aluminate aggregates have good resistance to molten metals and slag, making them suitable for use in applications where contact with these substances is common. This resistance helps to prolong the lifespan of the refractory castables, reducing maintenance costs and downtime. Lastly, calcium aluminate aggregates have a good bonding ability with other refractory materials, allowing for the development of strong and durable castables. This ensures that the castables maintain their shape and structure during operation, even under harsh conditions. Overall, the advantages of using calcium aluminate aggregates in refractory castables include high-temperature stability, low thermal conductivity, resistance to molten metals and slag, and strong bonding ability, making them a preferred choice for various industrial applications.

Periclase is a key ingredient in refractories because of its exceptional high-temperature stability and resistance to corrosion. It helps to improve the strength and durability of refractory materials, making them suitable for use in high-temperature environments such as furnaces, kilns, and reactors. Its presence also enhances the thermal shock resistance of refractories, preventing cracks and damage caused by rapid temperature changes. Overall, periclase plays a crucial role in ensuring the effective and efficient performance of refractories in various industrial applications.

Zirconia is primarily obtained through the extraction of zirconium silicate minerals, which are then processed using various techniques such as crushing, grinding, and refining to obtain pure zirconia powder. This powder is then mixed with other additives and binders to form a moldable or castable refractory material. After shaping, the material undergoes a firing process called sintering, where it is heated to high temperatures to achieve the desired strength and density, resulting in a refractory product suitable for various industrial applications.

Refractory raw materials with good thermal conductivity include graphite, silicon carbide, and alumina.

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