The working condition of cement rotary kiln, especially the coal injection pipe, is harsh, and the strong heat load and alkali erosion in this area are severe. It is required that the castable must be resistant to corrosion, wear, and fatigue under harsh conditions.
What is the construction thickness of the coal injection pipe casting material in the cement plant? The construction thickness of the coal injection pipe casting material is 80-100mm, and the density of the V-shaped anchor is also high, so it is often difficult to vibrate during pouring. Therefore, a certain range of particle proportions is required.
During the use of coal injection pipe castables in cement plants, alkali vapor erosion can cause cracking and peeling of the castables. Generally, the service life is 6-8 months. In recent years, some casting material manufacturers have upgraded their process ratios, increasing their lifespan to 10-12 months.
In addition, in order to increase the service life of the coal injection pipe castable, the construction method is also important. The welding area of the anchor can be increased. If any parts that are not welded properly are found, they should be repaired immediately. The head of the anchor must be treated with tape to prevent expansion of the casting body.
The pouring method during the construction of coal spray pipe pouring material should use vertical pouring, and the pouring mouth should be above. And it must be vibrated in place to prevent holes in the masonry from causing a decrease in strength and affecting its service life. After vertical pouring, the construction time will be extended, but segmental pouring can avoid defects in horizontal pouring and increase the service life.
The current coal injection pipe casting material is a process ratio of plate shaped corundum with silicon carbide and micro powder technology, which not only has good wear resistance and thermal shock resistance, but also can synchronize with the overhaul cycle of the kiln body.
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