高污染物烟气循环烧结合理配碳研究

Study on reasonable carbon content in high pollutant concentration flue gas circulating sintering

烟气循环烧结工艺通过循环利用烧结烟气进行铁矿烧结生产,大幅减少末端治理的烟气处理量,不但能够实现资源综合利用,还能实现烧结污染物减排。在烟气循环烧结生产时,循环进入烧结料层的高温烟气带入一定的热量,应在保证烧结成矿性能的前提下,适当降低烧结混合料配碳量,实现节能降耗,清洁节能生产的目的。本文根据烧结烟气特性,选取高污染烟气进行烧结杯实验研究,得到在不同减碳量条件下的烧结矿,并分别对其垂直烧结速率,成品率,粒度分布,强度,Fe O含量和微观结构进行检测,探究在烟气循环烧结工艺中的合理配碳量。实验结果表明:在高污染物烟气循环烧结的工艺条件下,烧结生产中减碳量为10%时,能够保证烧结矿各项性能指标和实现节能减排。

The flue gas circulation sintering process can not only realize the comprehensive utilization of resources, but also realize clean production at the same time. Which by recycling sintering flue gas to conduct iron ore sintering and significantly reducing the flue gas processing in the terminal treatment. In order to realize the purpose of energy saving and energy - saving production, flue gas circulation sintering process should reduce the carbon content of sintering mixture on the premise of ensuring sintering mineralization, so that the circulation of high temperature flue gas can partially bring the heat to the sintefing production. This research selected high pollution flue gas to make the sintering cup test according to the characteristics of siutering flue gas. To study on the reasonable carbon distribution in the flue gas circulating sintering process, this paper investigates the vertical sintering rate, yield, particle size distribution, strength, FeO content and microstructure of sinter. The results show that the reasonable carbon reduction amount is 10% to ensure the performance index of sinter under the condition of high pollutant flue gas circulating sintering.