polycrystalline mullite fiberIt is a kind of polycrystalline alumina fiber, the content of Al2O3 in the fiber is between 72% and 75%, and the content of Al2O3 generally exceeds 80%, which is called polycrystalline alumina fiber. The main crystal phase of polycrystalline mullite fiber is a single mullite phase, which is used in polycrystalline alumina fiber at high temperature, and has good thermal stability. It is a product that uses more than 1400 temperature.

Polycrystalline mullite fiber is widely used in metallurgy, machinery, ceramics, electronics, petrochemical, aerospace and other thermal industrial kilns and other thermal equipment lining insulation. It can achieve the purpose of saving energy and increasing production, reducing the temperature difference in the furnace, improving product quality, reducing the consumption of spare parts, extending the life of the furnace, and improving the working environment.

Polycrystalline mullite fiber is widely used as a new type of fireproof material. All fireproof materials have many precautions during use. Polycrystalline mullite fiber castables can be used in rotary kilns due to various advantages such as high temperature. Today, when using polycrystalline mullite fiber, we will inform you of the precautions.

　　polycrystalline mullite fiberThe castable is used in important parts such as rotary kiln front kiln, high temperature blanking pipe, tertiary air pipe, tertiary air valve, etc. During the use of polycrystalline mullite fiber, please pay attention to the following aspects:

1, efforts to improve the operation rate of the kiln system.

The start-up rate characterizes a series of problems such as whether the production is normal, whether the operation is meticulous and stable, and the number of failures and shutdowns. If the kiln production line refractory is decomposed in advance, it is afraid to open the kiln. In particular, the kiln mouth ingredients are the large damage site to open the kiln. The higher the continuous utilization rate of the kiln, the longer the life of the ingredients. If abnormal failures such as preheater blockage occur, the surface temperature of the kiln lining will drop from 1,400 to about 100~200 in more than 10 hours. After the problem is solved, it will rise sharply to the normal temperature, resulting in repeated high-temperature replacement, high-temperature organization of the injection body The structure is damaged and easy to explode, which has a great impact on the service life.

　　2、polycrystalline mullite fiberWater for castable

Hydroponic ingredients should be mixed with water binder to form the necessary initial strength and flow. On the contrary, the amount of water and binding agent as long as this purpose can be achieved, the amount of water to be put as little as possible to meet the low construction mobility of various parts. After the lining is baked at high temperature, it will produce high temperature sintering strength that can withstand the temperature of working conditions.

3, attach great importance to the process of mixing and homogenization.

The importance of this work lies mainly in the generation of fixed mineral phases in refractory materials at high temperatures. This is the result of the chemical reaction of each element inside the lining. All kinds of high temperature performance depends on the mineral phase and its homogenization degree. Similarly, the components of the raw material must be homogeneous to facilitate the reaction and the formation of the mineral phase. Second, the binder and its water are evenly dispersed and evenly wrapped on the surface of the material particles, so that it can be more hard and firm.