Solve the Problems Existing in Refractory Materials of Cement Rotary Kiln

During the operation of the cement rotary kiln, faults such as egg accumulation, flying sand, snowman making, and ring formation often occur. These failures not only affect the operation of the kiln but also affect the service life of the lining refractory material. To solve these problems, it is necessary to clarify the formation mechanism of these faults and destroy the formation conditions of the faults, so as to achieve the purpose of high yield, high quality, and low consumption.

Today we will talk about the ring formation problem of cement rotary kilns. The former and the latter are divided into three types. Among them, the most difficult to deal with is the rear ring.

Use refractory materials to slow ring formation

In order to slow down the formation of rings, in addition to controlling raw materials and fuels, improving the flammability of raw materials, improving combustion, adopting thin material quick-turn operations, and stabilizing thermal systems, refractory materials can also be used.

The test results show that the sulfur-alkali ring can be relieved by using bricks containing SiC or ZrO2, the sulfur-alkali ring can be relieved by the use of magnesium aluminum spinel bricks and magnesia alumina spinel castables, and some kilns can also be relieved by silica fume bricks. This is mainly through the selection of refractory materials to reduce the bonding strength between refractory materials and kiln materials, so that the attached kiln materials are easier to fall off. However, cement clinker and various cement kiln refractories are silicate materials. Therefore, the use of refractory materials can only reduce, but cannot completely avoid the bonding between the kiln lining and the kiln material.