大钟是高炉炉顶设备的主要零件之一,起着承料、布料和密封炉顶的作用。它通常的工作温度为500~700℃。在此温度下,要求它能耐冲击、耐磨、耐侵蚀。一般高炉大修周期为十年,如果大钟过早损坏,就会严重影响高炉生产。因此,对大钟的铸造质量要求较高。大钟的结构各高炉大同小异,常见的有带轴头(图1a)与不带轴头的(图1b)两种。它们共同的特点是:轮廓尺寸大、铸件相对壁薄。因此,对于铸造来说,大钟是一个工艺性较复杂的产品。 The bell is one of the main components of blast furnace roof equipment, plays the role of bearing material, fabric and sealing the top of the furnace. Its usual working temperature is 500 ~ 700 ℃. At this temperature, it is required to be resistant to impact, wear and erosion. General blast furnace overhaul cycle of 10 years, if the clock premature damage, it will seriously affect the blast furnace production. Therefore, the casting of the clock on the higher quality requirements. The structure of the bell The blast furnaces are similar, with a common head (Figure 1a) and without the head (Figure 1b) two. Their common features are: large outline size, relatively thin wall castings. Therefore, for casting, the clock is a more complex product.