What is the Thermal Expansion Difference of Zinc Oxide Rotary Kiln?时间：2020-06-23 作者 ：adminhk
The high temperature produced in the calcination process of zinc oxide rotary kiln will reduce the performance of refractory materials, which is caused by the shrinkage of kiln body and lining. Due to the high temperature in the whole process is directly affect the firing of zinc oxide, so it is easy to form a thermal shrinkage difference in this process.
Although high temperature is beneficial to the firing of zinc oxide, it will also reduce the performance of refractories and accelerate the corrosion of refractories. This will lead to the damage of refractory materials, which will affect the service life of refractory materials. Therefore, in order to replace the traditional data, a series of new refractory materials must be used in the zinc oxide pre synthesis kiln. For example, the normalizing point of the zinc oxide rotary kiln firing zone needs to be applied to the magnesia refractory materials, which also includes the direct separation of magnesia chrome bricks or high-quality chrome free alkaline bricks when the load softening temperature is not less than 1650 ℃.
When the barrel temperature of high temperature zone increases from 250-300 ℃ to 350-400 ℃, the zinc oxide rotary kiln will experience a large level of deformation, which will produce thermal shrinkage difference between the kiln body and the refractory materials. In some cases, this kind of difference can lead to a large gap between the cylinder and the refractory brick, which leads to the loose of the refractory material. In addition, due to the relative movement between the cylinder and the kiln lining during the operation of the zinc oxide rotary kiln, the refractory materials are worn.