Lightweight mullite castable is a kind of refractory material with excellent high temperature performance and good thermal insulation performance. Since it is produced with high-quality synthetic raw materials and is combined in the form of low-cement or micropowder, it can be directly applied to high-temperature parts in contact with flames.
Selection of Lightweight Mullite Aggregate
As the main component of castable, light mullite aggregate has a crucial influence on the performance of castable, so its selection should be carried out carefully. Due to the differences in the detection methods of the bulk density and compressive strength of lightweight aggregates, we should not only detect the indicators of lightweight aggregates but also the indicators of the castables produced with this aggregate, which is very necessary to judge the quality of raw material.Properly increasing the critical particle size of the aggregate is beneficial to enhance the compressive strength of the castable, but if the critical particle size is too large, it will adversely affect the construction performance of the material. After testing, we confirm the critical particle size is 12mm.
Next issue we will continue to introduce lightweight mullite castables for heating furnace.
