Methods to Improve Lifetime of Pouring Mouth of Converter
Typically, the service life of pouring mouth of converter largely affects its production efficiency. In the process of using converter, proper maintenance of pouring mouth is very important. In order to ensure the production efficiency and product quality, we must strive to extend the service life of pouring mouth. This article illustrates several technical methods in order to improve the lifetime of pouring mouth of converter.
The first method to improve the lifetime of pouring mouth of converter is to improve the lining quality. The lining material needs to possess certain ability of thermal shock resistance. The lining material should be required to have good acculturation capability with bath, and the temperature of lining should be appropriate. The lining material used in ladder of converter should be different from that used in tuyere pour hole. The thickness of lining should be properly designed, and it should be based on different pouring process.
The second method to improve the lifetime of pouring mouth of converter is to reduce the number of times for tapping. When there is coke deposit at the bottom of converter, tapping will result in not only increase of scrap rate and energy consumed, but also reduce lifetime of pouring mouth of converter. The coil steel tapping should be properly arranged in order to reduce number of times for tapping, and this can reduce the damage to the lining caused by tapping.
The third method to improve the lifetime of pouring mouth of converter is to prevent the damage caused by steel splash. The steel splash generated during the tapping procedure is inevitable, and it will cause damage to the converter lining, especially that of near the tuyere pour mouth. Before tapping, operator should adjust placement of pouring mouth and slag holes to reduce steel splash. In addition, proper protective measures are also needed to be taken to mitigate the influence of steel splash.
The fourth method to improve the lifetime of pouring mouth of converter is to prevent the sticking of slag and plugging of tuyere hole. The sticking and plugging of slag and tuyere holes, which are caused by impure steel and high alkalinity of converter bath, is one of the reasons for reducing the lifetime of pouring mouth. Therefore, monitoring on the steel quality and bath alkalinity is essential, and timely measures should be taken if the values are too high. Besides, the quality of lancing and temperature of lance tip should also be checked.
The fifth method to improve the lifetime of pouring mouth of converter is to properly arrange the duration and interval of tapping. The inspection should be conducted before and after tapping, and then the gap depth and gap width should be recorded. If the gap width is too large, it is necessary to take timely measures to reduce it. During pouring, attention should be paid to the stoppage time, and the interval and duration of tapping should be properly arranged.
In summary, proper maintenance is of great significance for improving the service life of converter pouring mouth. The above mentioned methods can help to improve the lifetime of pouring mouth of converter. While applying them, operators should be careful and pay attention to actual conditions.
