摘要
采用镜铁矿作为铁原料,通过改变天然气流量和氧气过剩系数以及氧气和空气的配比,在实验室进行了一系列点火烧结试验研究,重点考查富氧对烧结点火的影响。研究表明,富氧烧结点火能够降低烧结点火能耗和减少CO2的排放量,同时点火温度上升,烧结料层表面固体燃料的利用率提高,并可获得良好的烧结矿产量、质量指标。当天然气流量为2 m3.h-1,点火时间为1.5 min,助燃风为50%氧气+50%空气(体积分数),氧气过剩系数为1.9的情况下,烧结点火能耗为30.32 MJ.m-2,点火烟气中氧的体积分数为14.28%,所获得的烧结矿成品率和转鼓强度分别为72.32%和65.30%。与助燃风为空气,其它条件不变的情况比较,烟气中氧的体积分数提高了5.17%,烧结矿成品率和转鼓强度分别提高了10.59%和1.97%。
A series of experiment studies on ignition effects of sintering using the specularite were done,which focus on the effects of enrichment oxygen for sintering ignition by changing oxygen excess coefficient and the ratio of oxygen and air under different natural gas flow.The results show that,energy consumption and CO2 emission can be reduced through enrichment oxygen to ignition sintering.Meanwhile,the temperature of ignition can be improved;the utilization of solid fuels in the surface layer of sinter bed and a good sintering index of quality and quantity can be obtained.Under the conditions of the gas flow of 2m3·h-1,ignition time of 1.5min,the combustion-supporting wind of 50% oxygen and 50% air and oxygen excess ratio of 1.9,the sintering ignition energy consumption is 30.32MJ·m-2,oxygen content of flue gas is 14.28%,the rate of finished product and tumble strength is 72.32% and 65.30% respectively.Comparing with the above condition using combustion-supporting wind for 100% air,the results show that the flue gas oxygen content is increased by 5.17%,the rate of finished product and tumble strength is increased by 10.59% and 1.97% respectively.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
2010年第12期17-21,共5页
Journal of Iron and Steel Research
基金
教育部新世纪优秀人才支持计划资助项目(NCET-04-0748)
关键词
烧结
富氧点火
氧气过剩系数
点火强度
sintering
enrichment oxygen ignition
oxygen excess ratio
ignition intensity
