Name: Suzhou cycas Microelectronics Co., Ltd.
Address: 1st floor,B06 building,No.2,Fuxing Road,Zhangjiagang Economic Development Zone,Jiangsu Province 215600PRC
Process layout and high temperature sealing ring of vacuum annealing furnace
Process layout of each section of vacuum annealing furnace: ① channel of upward preheating section; ② channel of downward direct combustion section; ③ heating section of horizontal radiant tube; ④ soaking section of electric radiant tube; ⑤ spraying cooling section of circulating protective gas; ⑥ furnace nose system. In the annealing process, the strip steel is first annealed by the double sealing rollers in the preheating section of the upward stroke into the furnace, and the heating of the preheating section is completed by the combustion products in the direct combustion section. After the strip steel of annealing furnace passes through the vertical preheating section channel, it turns 18 ℃ through the top double turning roller to reach the non oxidation direct combustion section of the down stroke; the furnace in the direct combustion section has 4 control areas, 42 burners in total, 12 burners in each of the first 3 control areas, and 6 burners in the fourth control area. Air is mixed with excessive coke oven gas to ensure the reduction atmosphere in the furnace.
After passing through the direct combustion section, the steel strip enters the horizontal radiant tube heating section (the horizontal radiant tube heating section is divided into 5 control areas, a total of 60 radiant tubes) by turning to 90 ℃ through the bottom turning roller, and then it is heated to the final annealing temperature required by the product level (the radiant tube heating section under the protective atmosphere is completed) and then enters the soaking section (soaking for about 10s), and then enters the protective gas jet cooling section. The cooler will protect The gas is circulated to both sides of the strip to promote its rapid cooling (35 ℃ / s).
When the strip reaches the proper temperature, it passes through the outlet section. The outlet section is composed of a steering inclined chute. The annealing furnace steel strip needs to keep temperature equilibrium for a short period of time before coating, and then it enters into the zinc pot below through the alloy furnace nose which is inclined downward.
The high temperature sealing ring of annealing furnace, which is the first technology in China, has successfully deformed and aged the sealing ring under the high temperature state of annealing furnace, which has improved the quality of the high temperature sealing ring of annealing furnace and lengthened the service life by several times. Now, through the actual high temperature aging resistance test of Zhejiang Huada group Copper Co., Ltd., Jiangxi Copper Co., Ltd., Hangzhou oxygen free Copper Co., Ltd. and other units, it is more than the same kind of products in China The average life of the product has been extended by twice, which greatly saves the cost of high temperature sealing ring and brings actual effect to the enterprise. The high temperature sealing ring of annealing furnace is widely used in metallurgical industry. The practice shows that the high temperature sealing ring of annealing furnace, which is the first technology in our country, has advantages in some fields. The three indexes of sealing performance of high temperature sealing ring of annealing furnace are compression rate, rebound rate and gas leakage rate.