【作者】 肖康；

【导师】 张传福； 刘智能；

【作者基本信息】 中南大学 ， 冶金工程， 2005， 硕士

【摘要】 在合适条件下,窑皮挂渣对减缓窑内衬的蚀损,延长窑内衬使用寿命,降低氧化锌生产成本具有十分重要的意义。 研究中通过从组成窑体和窑皮的几层不同物质的理化性质着手,详细研究了窑皮的基本结构和化学成分、挥发窑窑内衬蚀损的主要形式,以及窑皮挂渣机理。同时结合提高金属挥发率,确定了实现锌浸出渣挥发窑挂渣保护的最佳技术条件,取得了很大的成效。生产实践证明:选择好合适的耐火材料,内衬100mm左右,较小的挥发窑内径,控制浸出渣中的水分在13%左右,焦比在50%～60%之间,保证进料均匀、窑况稳定,窑尾烟气温度控制在550～750℃之间,保持窑尾的负压,控制好风压和窑皮淋水等条件,能够成功地实现挂渣保护并保证金属挥发率,达到延长挥发窑使用周期目的。更多还原

【Abstract】 Under a certain circumstance, it is significant for a surface lubricity slag-kiln crust to greatly delay the corrosion of the lined bricks, prolong its service life and reduce the production cost of zinc oxide (ZnO).In this paper, based on the analysis of physical and chemical properties of the different layers which form the slag-kiln crust and lined bricks, structure, chemical component and hung mechanism of the slag-kiln crust and corrosionforms of the volatilization kiln lined bricks were systemically studied. Meanwhile, combining with increasing the volatilization ratio of metal, the optimum technical conditions for achieving the slag-kiln crust hung were given, whose effects were further verified. The practical results show that under such conditions as choosing suitable refractory, 100 mm thick lined bricks, controlling zinc leaching residue water ratio about 13% and coke ratio between 50% and 60%, ensuring stable feeding and kiln condition stabilization, gas temperature off kiln between 550℃ and 750℃, keeping well minus press after kiln, compress air pressure before kiln and water poured out of kiln, both protective effect of slag-kiln crust and high volatilization ratio of metal can be achieved, which effectively prolong service life of the lined bricks.更多还原