高炉制粉系统的废气循环过程  

Circulation Procedure of Waste Gas for PCI System of BF

作　　者：吴铿[1] 魏欣[1] 左兵[1] 马政峰[1] 李安军[1] 张向国[1] 

机构地区：[1]北京科技大学冶金学院,北京100083

出　　处：《钢铁研究学报》2004年第2期6-9,共4页Journal of Iron and Steel Research

基　　金：国家自然科学基金;上海宝山钢铁集团公司联合资助项目(50174006)

摘　　要：磨煤机与热风炉相距较远时,制粉系统采用废气循环可以节省投资,而且对环保有利。采用废气循环的关键是提高磨煤机入口热气体的温度。笔者以安阳铁厂为例,对废气循环的工艺参数,如气体的进口和出口温度、循环率、氧含量、气体饱和水含量以及漏风率等进行了计算和分析。结果表明:在保证系统氧含量小于12%的情况下,提高磨煤机入口和出口的气体温度,可以保证安全生产,并保证煤粉水含量小于1%。这为制粉系统采用废气循环提供了依据。When the distance between the grinder and hot blast stove is long the investment can be decreased by using waste gas circulation in the grinder system, which is beneficial to environmental protection. The key technique of using waste gas circulation is to increase the inlet gas temperature of the grinder. The technical parameters such as inlet and outlet gas temperature of the grinder, circulation rate, oxygen content, saturation water content of the gas and rate of air entering the grinder, etc, were calculated and analyzed according to the practice of production at Anyang Iron and Steel Group Co. Under the condition of less than 12 % oxygen of the system, less that 1 % water in pulverized coal be reached by increasing the inlet and outlet gas temperature of the grinder. The results afford the basis for using the waste gas circulation in the grinder system.

关 键 词：高炉 炼铁 制粉 废气循环 喷煤 

分 类 号：TF54[冶金工程—钢铁冶金]