Treatment method for high surface temperature of rotary kiln body
The abnormal increase in surface temperature of the rotary kiln body is not a small matter. It not only means a sharp increase in energy consumption, but also a dangerous signal of severe wear of refractory bricks in the kiln, and even deformation of the kiln barrel. In this situation, it is necessary to immediately conduct a systematic investigation and handle it decisively.
Step 1: Accurately diagnose and identify the root cause
We must not blindly cool down. The first thing we need to do is to determine whether the overheating is a local "red kiln" or a global temperature rise.
Localized red kiln: Often, the refractory bricks at that location have fallen off or severely eroded, and high-temperature flames or materials directly bake the cylinder. The kiln must be stopped immediately for lining maintenance, which is the bottom line of safety production.
Overall temperature rise: It may be caused by poor hanging of the kiln skin, improper flame shape, poor ventilation inside the kiln, or severe overload of the system output. Infrared thermal imager scanning is required, combined with comprehensive analysis of central control operation parameters.
Step 2: Targeted treatment, treating both the specimen and the root cause
Inner lining maintenance is fundamental: immediately stop the kiln and inspect the inner lining. If the thickness of refractory bricks is below the safe value, they must be replaced. Quality must be ensured during masonry, and the kiln drying system must be strictly implemented to ensure stable hanging of the kiln skin. This is the first barrier to isolate high temperatures.
Optimization operation is key: adjust burner parameters to ensure smooth and powerful flame shape without sweeping the kiln skin. Optimize the matching of kiln speed and feeding amount, and stabilize the thermal system. Strengthen system sealing, reduce air leakage, and avoid local high temperature concentration.
Strengthen external cooling and monitoring: While ensuring the integrity of the inner lining, the cylinder cooling fan can be used reasonably, but it is important to avoid pouring cold water directly to prevent sudden cooling, deformation, and cracking of the cylinder. At the same time, it is necessary to install and rely on an online temperature monitoring system to achieve automatic overheating alarm and preventive maintenance.
The core of dealing with high temperature on the surface of the kiln body is "protecting the inner lining, stable operation, and strict monitoring". It tests the depth of our understanding of the kiln system and the precision of our actions. Only by fundamentally solving the problem internally can we ensure the long-term safe and stable operation of the rotary kiln.
