19 Mar,2019 UTC+8 Views:
In large-scale mechanical equipment, the rotary kiln cylinder is used as the supporting and rotating parts of the equipment. During the operation of the equipment, it is exposed to high temperature for a long time. Because the kiln mouth section is often burned and deformed, it is necessary to replace the new cylinder section when it is serious. If the new cylinder is not replaced in time, it will seriously affect the normal operation of the equipment, which will affect the overall efficiency.
1. The output is too large, and the wear of the kiln cylinder material is intensified, which is easy to cause overheat deformation of the cylinder.
2. The heat flow is too large, the cooling zone is short or even no, the working environment of the kiln mouth is bad, the temperature of the kiln clinker is 1300-1400 °C, and the secondary air temperature is 1000-2000 °C.
3. The cylinder temperature is too high, the thermal expansion is large, and the strength of the high temperature resistant material is seriously attenuated.
4. The looseness of the kiln mouth shield bolt causes the refractory material to fall off, thereby burning the cylinder.
5. Burning contaminated soil, improper handling will cause serious corrosion to the cylinder, and in severe cases, the kiln will collapse.
6. Corrosion of kiln cylinder by sulfur, phosphorus and chlorine, in addition to reducing the thinning strength of the kiln cylinder, it will reduce the shaping of the steel and increase the brittleness of the steel, which may lead to the brittle failure of the kiln cylinder.
It can be concluded that it is very necessary to regularly detect the running condition of the components of the equipment, find problems and timely replace and replace the components. While improving the economic benefits of the enterprise, it can also effectively extend the service life of the equipment!
After years of development and experience, Xinxiang Great Wall has accumulated rich experience in processing and casting, and has a large casting production and processing enterprise in the north of Henan. Continuously introduce advanced casting equipment at home and abroad; in the process, continuously optimize the casting process, form the production process of the system, and ensure the quality of castings. At present, Xinxiang Great Wall can provide customers with complete solutions from rough casting to finished product system services and key component finished products processing.
The rotary kiln cylinder is made of steel plate such as boiler plate and Q235C plate. The dimensional accuracy and shape tolerance are high, and the processing quality directly affects the strength and sealing of the component.
Due to transportation reasons, the rotary kiln is composed of a plurality of cylinders. Because the outer circle of the cylinder is not processed, the perpendicularity of the end face to the center of rotation cannot be directly measured. In the process design, the verticality of the end face is converted into parallelism and the coincidence of the axes at both ends according to the structural form of the cylinder.
The cylinder body adopts the method of partial forming. According to the detailed requirements of the drawings, the specific manufacturing process and welding method of the single-section cylinder body are formulated. After the cylinder assembly and welding, post-weld treatment, including non-destructive testing and post-weld heat treatment, is required. And pressure-resistant experiments and other processes to ensure the production of high-quality cylinder castings.