论文部分内容阅读
我厂有一台3吨/小时的二排大间距冷风冲天炉(排距为600mm)。前几年的使用效果一直良好,铁水温度稳定在1400℃以上,完全能满足生产需要。但近来铁水温度却有所下降,而且过桥烧损严重(寿命从40～60下降到10～20小时),打炉后底焦多为碎块状。经过分析我们确认是由于焦炭质量下降所致。我们过去使用的焦炭,其固定碳含量都在80%以上,现在使用的只有70～73%,且强度较差。我厂冲天炉的风口排距为风口区炉膛直径的1.1倍,完全符合尺寸要求。但为什么在相同的铁碳比条件下焦炭的固定碳含量下降后铁水的温度会下降?为解决这个问题,我们着手调整了一些参数,
I plant a 3 tons / hour two rows of large-spaced cold cupola (row spacing of 600mm). A few years ago the use of the effect has been good, the hot metal temperature stabilized at 1400 ℃ above, fully able to meet production needs. However, the temperature of molten iron has dropped recently, and the bridge burns heavily (life expectancy drops from 40 to 60 to 10 to 20 hours). After analysis, we confirm that due to the decline of coke quality. The coke we used in the past has a fixed carbon content of more than 80% and is currently used only 70-73% with less strength. The firing distance of the cupola in our factory is 1.1 times of the diameter of the furnace in the tuyere area, which fully meets the size requirements. But why the temperature of hot metal drops after the fixed carbon content of coke declines under the same iron-carbon ratio? To solve this problem, we set out to adjust some parameters,