Phosphate brick
Both phosphate brick and high alumina brick can be used in lime kiln lining. If it is a calcining zone, phosphate brick is more suitable for this area than high alumina brick.
Lime kilns are divided into vertical kilns and rotary kilns. At present, there are more vertical kilns on the market. In general, vertical kilns use high alumina bricks, clay bricks, and phosphate bricks as linings. However, if it is a rotary kiln, all phosphate bricks are used, phosphate wear-resistant bricks are used in low-temperature zones, and special phosphate bricks are used in high-temperature zones. Because the phosphate wear-resistant bricks are alkaline in the kiln lining, which is consistent with the atmosphere of lime, the burnt lime has good activity under the same gas field.
However, high alumina refractory bricks are also used in the transition zone, and the lining of the vertical kiln is also built with clay bricks and high alumina bricks. The use of high alumina refractory bricks will be relatively lower than phosphates, but according to the use cycle, high alumina bricks do not have a long use cycle in the lime kiln lining than phosphate refractory bricks. The lining materials of vertical kiln lime kiln also depend on the region and the habits of the users. Some manufacturers use high-alumina bricks, while others use phosphate refractory bricks. There is no standard regulation for this. The lining is made according to the requirements of the user.
If from a technical and appropriate perspective, phosphate wear-resistant bricks are indeed more suitable for lime kiln lining than high-alumina bricks. The key is that the service life is long, and the lime fired in a similar atmosphere is more active.
In short, phosphate bricks or high-alumina bricks can be used. Compared with the two, phosphate bricks are more suitable for lime kiln lining. If it is a rotary kiln, it is also a necessary and appropriate choice to use phosphate bricks for the entire kiln lining.
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