Diagnosis of the Leakage of sintered Production
Introduction
In production process, the leakage of sintered production is a common problem. It can be reflected by the variations of quality and output, and understood through the production process. The leakage phenomenon mainly includes the deposition cracking, pyrite and particle size problem, which are caused by the instability or abnormality during the production process. In this paper, the diagnosis of the leakage of sintered production is discussed, and the solutions to the problems are suggested.
Definition
Leakage is a phenomenon in which air and flow pass through the sintered material during the production process. When this phenomenon occurs, it will damage the production process, cause a decrease in quality, output and other malfunctions in the production line.
Reasons
The main factors influencing the leakage of sintered production are the variation of kiln temperature, the temperature difference at different positions, the fluctuations of air source pressure, the irregular residence time, the deviation of the mixture of raw materials, and other molding and heat-treatment process errors.
Variation of Kiln Temperature: The production temperature is too high and is not uniform in the kiln, causing directly the crack at the edge of sinter and diffusion of gas between sinter, leading to leakage phenomenon.
Temperature Difference: The temperature difference between the parts of the lower and upper layers is large, and the sinter portion is too small, resulting in the edge crack of sinter and the diffusion of gas, resulting in the leakage phenomenon.
Fluctuations of Air Source Pressure: The air pressure fluctuates significantly while the air passes through the sinter, which can cause sinter cracking, resulting in the leakage phenomenon.
Residence Time: The stay of sinter in the kiln for a long time, cracks on the edge of sinter, which can easily cause the diffusion of gas and the leakage phenomenon.
Deviation of the Mixture of Raw Materials: The mixing deviation of the raw materials contributes to large temperature difference elements exist in sinter, which will result in the edge crack of sinter and diffusion of gas, leading to the leakage phenomenon.
Molding and Heat-treatment Process Error: The casting process is not uniform and the sinter is cooled unevenly, causing the crack at the edge of sinter and the diffusion of gas, and the leakage phenomenon.
Solution
Regulating Kiln Temperature: The temperature should be adjustable in the kiln, and the temperature difference in the same kiln should be controlled to reduce the edge cracking of sinter and diffusion of gas, thus eliminating the leakage phenomenon.
Control the Temperature Difference: The temperature difference between the parts of the lower and upper layers should be stabilized, and the sinter portion should be increased to reduce the edge crack of sinter and the diffusion of gas and eliminate the leakage phenomenon.
Adjust Air Source Pressure: The fluctuation of air pressure should be slowed down and the pressure should be kept normal in the kiln, which can prevent the sinter from cracking, diffusing gas and forming leakage phenomenon.
Reduce Residence Time: The residence time of sinter should be reduced, so as to prevent the edge crack of sinter and the diffusion of gas, and reduce the leakage phenomenon.
Adjust the Mixture of Raw Materials: The raw material mixture should be adjusted to obtain a uniform temperature, so as to reduce the temperature difference and avoid the edge crack of sinter and diffusion of gas, thus eliminating the leakage phenomenon.
Improve the Molding and Heat-treatment Processes: The casting process should be uniform and the sinter should be cooled evenly, to avoid the cracking at the edge of sinter and diffusion of gas and reduce the leakage phenomenon.
Conclusion
The leakage of sintered production is a common problem. It can be reflected by the variations of quality and output. It is mainly due to the temperature differences in the kiln, the large fluctuations of air source pressure, the irregular residence time, the deviation of the mixture of raw materials and the molding and heat-treatment process errors. Therefore, it is necessary to take corresponding measures to solve these problems to reduce the leakage phenomenon, such as adjusting the kiln temperature, controlling the temperature difference, reducing the residence time, adjusting the mixture of raw materials and improving the molding and heat-treatment process.
