Characteristics of lightweight mullite refractory bricks

Generally light mullite brick can be used as a general kiln lining with a higher operating temperature not higher than 1550 ° C.

In the production of lightweight mullite bricks, the final dimensions of the final product are guaranteed. In addition to the influencing factors of ingredients and firing, it is mainly dependent on the regular semi-finished mechanical profiling to ensure.
 

1. The role of additives

This additive is a composite additive composed of a variety of refractory materials, which can promote the progress of the reaction.It plays a good role in stabilizing the volume at each stage of light mullite brick firing, and a series of physical and chemical reactions occur. Formation of mullite phase.

 

2. Lost property

Lost-on-burn materials used were polystyrene pellets and wood flour. Polystyrene pellets are hydrocarbon compounds. After firing, the spherical pores with smooth inner spheres and strong and strong pore walls can be formed inside the light mullite bricks. The weak point of the ball is that the spheres in the mud are easy to agglomerate and cannot form a pull, which is not conducive to the improvement of the strength of the green body. The allowable amount of this ball is limited.In order to effectively reduce the density of lightweight mullite bricks without reducing the strength of the green body,

 

3. The role of water reducing agent

The molding method of lightweight mullite bricks is wet plastic molding, with high moisture content in the mud, and the shrinkage of the green body during the drying process is large. Cracks and uneven shrinkage of the green body are easy to occur. The addition of water reducing agent effectively reduces the amount of water added and avoids the above problems.

 

If you are interested in our fused azs bricks, or need other types of refractory materials, please contact our Tianyang Refractory Group, we will definitely provide you with the best quality refractory materials and the most reasonable quotation.