Refractory prefabricated parts are divided into small pieces in advance, and the appropriate shape is designed, and then the mold is made according to the shape, and then the mold is poured in the factory, cured, and baked, and then transported to the site for construction and installation.
The application of refractory precast parts has changed the method of traditional castable on-site pouring construction, making the construction simple and easy, and can save on-site mixing, pouring or ramming and the corresponding equipment required, greatly saving construction time and enabling on-site construction The conditions are not affected by the construction environment and seasons, and are more conducive to ensuring the quality of construction.
In order to facilitate the production, transportation and installation, the shape of the prefabricated parts cannot be designed to be too large or too complicated, and the dimensions are as uniform as possible. In addition, it is necessary to consider the combination of blocks to enhance the integration effect after construction. The construction parts need to be cleaned up, otherwise it will affect the installation accuracy and effect of the refractory prefabricated parts.
Most of the parts used in refractory preforms are special parts under high temperature, cement clinker erosion, abrasion, rapid cold and rapid heat, etc., which are prone to mechanical deformation, and need to have good corrosion resistance, good wear resistance and high temperature gas resistance.
Scourability and excellent thermal shock resistance. To meet the performance requirements, the ratio of raw materials is the basis, which is similar to the requirements of castables, but castables need to pay attention to the performance of the entire temperature range from construction to use conditions, and refractory preforms are used as shaped products prepared with castables , Pay attention to the performance after baking.
Many manufacturers have listed the performance indicators of preforms under different temperature conditions. In fact, it is of little reference for cement manufacturers. In view of this situation, the raw materials and proportions used in refractory preforms can be adjusted on the basis of the castable, and more attention needs to be paid to the performance after baking.
Refractories at key parts of cement kilns require high construction quality during the construction process. During the maintenance of cement kilns, the construction period is generally short, and the construction quality of on-site pouring is difficult to guarantee.
The quality of construction has a great impact on the service life of refractory materials. Impact. The increase in the amount of water will increase the porosity of the castable, reduce the strength, and seriously affect the wear resistance of the castable.
The castable must have a certain curing time after the construction is completed, and it must be baked after the curing is completed, otherwise it is easy to burst.
Because the production process of refractory precast parts is carried out in the production enterprise, it can overcome the adverse effects of on-site construction time, environmental and seasonal temperature changes, on-site construction management and other factors.
After sufficient maintenance and strict baking, the construction quality can be guaranteed, and the factors can be greatly reduced. The quality problems caused by non-standard construction enable the performance of refractory materials to be fully utilized. After installation, it is directly ignited and used, which shortens the maintenance time and can create good economic benefits.
