论文部分内容阅读
1.改造性大修前窑体的变革我厂157.5米隧道窑是原苏联五十年代的窑型,它用来生产硅砖。这种窑型一般是窑车与窑车衔接简单(见图1),因此窑体密封不良,容易窜火。1972年后我厂不再生产硅砖,而用硅砖157.5米隧道窑来焙烧镁砖与镁铝砖,最终烧成温度由烧成硅砖的1370～1390℃,提高到烧成镁砖的1560～1580℃。因此,原硅砖砌筑的窑顶不断发生熔蚀,不适应烧成镁砖的操作要求。 1974年9月,157.5米隧道窑进行了一次大修,大修中按照一般烧成镁砖的要求,参照一般镁砖隧道窑砌筑情况,取消了硅砖内衬与窑顶,采用了镁铬砖内衬和镁铝砖拱吊顶。三年后,实践证明采用拱吊顶效果很好,保持了窑顶拱型完整,即使在窑顶一环
1. Reform overhaul before the change of kiln I plant 157.5 m tunnel kiln is the former Soviet Union’s fifties kiln, it is used to produce silicon brick. This kiln type kiln car and kiln car is generally a simple interface (see Figure 1), so poor kiln seal, easy to channeling fire. After 1972, our factory will no longer produce silicon brick, but use 157.5 m silica brick tunnel kiln to burn magnesia brick and magnesia-alumina brick. The final firing temperature will be increased from 1370 ~ 1390 ℃ of fired silica brick to 1560 ~ 1580 ℃. Therefore, the original silicon brick masonry continued erosion of the top of the kiln does not meet the operating requirements of fired magnesia. In 1974 September, 157.5 m tunnel kiln overhaul, overhaul in accordance with the requirements of the general firing of magnesia, with reference to the general magnesia brick kiln masonry, lifted the lining of the silica brick and the top of the kiln, using a magnesia-chrome brick Lining and magnesium aluminum brick arch ceiling. Three years later, the practice proved that the use of arch ceiling effect is very good, maintaining the integrity of the arch top of the kiln, even in the top ring of the kiln