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真空退火爐工藝布置及高溫密封圈概況Process layout and high temperature sealing ring of vacuum annealing furnace

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真空退火爐工藝布置及高溫密封圈概況Process layout and high temperature sealing ring of vacuum annealing furnace

發布日期:2019-05-11 作者: 點擊:

真空退火爐各段工藝布置:①向上的預熱段通道;②向下的直燃段通道;③水平輻射管加熱段;④電輻射管均熱段;⑤循環保護氣體噴射冷卻段;⑥爐鼻子係統。在退火過程中,帶鋼首先通過向上行程的預熱段的雙密封輥進入爐內開始退火,預熱段的加熱由直燃段的燃燒產物來完成。退火爐帶鋼通過垂直的預熱段通道後,經頂部雙轉向輥轉向18℃到達下行程的無氧化直燃段;直燃段的爐子有4個控製區,共42個燒嘴,前3個控製區每區有12個燒嘴,第4個控製區有6個燒嘴。空氣與過量焦爐煤氣混合燃燒,保證爐內的還原氣氛。

帶鋼通過直燃段後,經底部轉向輥轉向90℃進人水平輻射管加熱段(水平輻射管加熱段分5個控製區,共60個輻射管),將其加熱到產品等級所要求的Z終退火溫度(在保護氣氛下的輻射管加熱段完成)後到均熱段(均熱10s左右),再進人保護氣體噴射冷卻段,冷卻器將保護氣體循環噴吹至帶鋼兩麵促其快速冷卻(35℃/s)。

當帶鋼達到合適的溫度後通過出口段。出口段由轉向斜滑槽組成。退火爐帶鋼在塗鍍前需保持一小段時間的溫度均衡,然後其通過斜向下的合金爐鼻子進人布置在下方的鋅鍋內。

退火爐高溫密封圈,我廠使用國內首創技術,成功的將退火爐高溫狀態下密封圈變形老化嚴重的難關,使退火爐高溫密封圈提高了質量,壽命加長了幾倍,現以經浙江華達集團銅業公司,江西銅業公司,杭州無氧銅廠等多家單位實際抗高溫老化測試,比國內同類產品壽命平均延長了兩倍,大大節省了高溫密封圈的費用,給企業帶來了實效。退火爐高溫密封圈在冶金行業應用非常廣泛,實踐中顯示了我廠使用國內首創技術的退火爐高溫密封圈,它在某些領域具有的優勢,退火爐高溫密封圈密封性能的三項指標:壓縮率、回彈率、氣體泄露率

      

                               Process layout and high temperature sealing ring of vacuum annealing furnace

   Process layout of each section of vacuum annealing furnace: channel of upward preheating section; channel of downward direct combustion section; heating section of horizontal radiant tube; soaking section of electric radiant tube; spraying cooling section of circulating protective gas; 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.


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