News Date:2020-05-09 13:41:52
The kiln tyre is a large round steel casting. It is mostly used in rotary kiln equipment. Due to its large volume, long production cycle, large force, and large torque, once the quality problem occurs, the kiln tyre will not only increase Enterprise maintenance costs, in severe cases, will also lead to kiln shutdown and replacement, affecting the completion efficiency of the finished product.
The kiln tyre is a large-scale steel casting, and it is inevitable that there will be casting defects such as sand holes, slag inclusions, inclusions, etc. According to the investigation, most of the crack origins on the inner side of the kiln tyre have trachoma and slag addition. Under normal circumstances, when the kiln is stopped for maintenance, the temperature of the kiln body will be reduced from 150-300 ℃ to atmospheric temperature, and the entire kiln body will be shortened, resulting in uneven internal stress of the kiln tyre, and the action point of the kiln tyre and tug will change. The sudden start of the cold kiln caused the brittle fracture of the low temperature brittle state. The low-temperature brittle fracture of the belt occurs mostly in winter and spring. According to the above description, it can be concluded that under low temperature conditions, a small stress is enough to cause brittle fracture of the tire.
Therefore, when the rotary kiln is overhauled or intermediately repaired, it should avoid the season months where the temperature is below 0 ° C as much as possible. Even if it is overhauled in winter, it is prohibited to turn the kiln body suddenly without preheating at low temperature. When it is necessary to turn the kiln body, heating measures should be taken at the wheel belt so that the temperature of the kiln tyre is not lower than 0 ° C before the kiln can be turned.
In order to enhance the performance of the tire,chaeng adopts advanced dual media quenching process in the casting process. All parts are forged evenly. It has the characteristics of high quenching hardness and high toughness, making the tire with good wear resistance ,we can adapt to all kinds of harshworking environment.