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在冶炼高级合金钢,例如高速工具钢3铬2钨8等,由于含钨、锰等合金元素很高,并且出钢温度也比一般钢种要高些,因此钢水对塞头砖的浸蚀非常严重,往往由于塞头砖被冲刷或炸裂以及被浸蚀而严重损坏了塞头砖的原来形状,无法控制正常的浇注速度,甚至造成漏钢事故。1959年初以来,因塞头砖而引起的事故不断发生。为了解决塞头砖的质量,杜绝漏钢事故,东北某厂在大闹技术革命的同时,推广了大冶、大连等兄弟厂采用焦油与沥青煮塞头砖的先进经验。首先挑选的没有缺边裂纹和潮湿的塞头砖,放入配好的焦油沥青锅里,焦油:沥青为1:3,一般情况下在130～160℃保持30～36小时。
In the smelting of advanced alloy steel, such as high-speed tool steel 3 chrome 2 tungsten 8, due to tungsten, manganese and other alloying elements are high, and tapping temperature is higher than the average steel, so the erosion of the plug on the brick Very serious, often because of the plug brick was washed or burst and was eroded and seriously damaged the original shape of the plug brick, unable to control the normal pouring speed, and even cause a steel leakage accident. Since the beginning of 1959, accidents caused by cemented brick continue to occur. In order to solve the quality of the plug head brick and eliminate the steel outlet accident, a factory in northeast China made great efforts to revolutionize the technology revolution and promoted the advanced experience of using tar and asphalt bricks in Daye and Dalian brothers factory. First, select the lack of flaws and wet plug bricks, placed in a good tar pitch pot, tar: asphalt 1: 3, under normal circumstances at 130 ~ 160 ℃ for 30 to 36 hours.