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为优化烟气循环烧结技术、实现节能减排,在实验室条件下,通过模拟烟气研究了循环烟气氧含量对烧结产质量指标、烟气成分排放规律、烟气温度、冶金性能和矿相组成的影响。结果表明:随着循环烟气氧含量增加,垂直烧结速度、成品率、生产率和转鼓强度都逐渐升高。循环烟气氧含量不低于18%时,氧含量变化对烧结过程燃烧率的影响有限,但循环烟气氧含量的减少会使烧结烟气中的氧含量降低,抑制烧结矿铁酸钙的生成,使还原度略有下降,低温还原粉化性能得到改善。与基准相比,采用循环烧结会延长料层高温维持时间并使循环烟气中的SO_2产生富集。将循环烟气氧含量控制在18%以上,可得到产质量指标良好、矿相组成合理的烧结矿。
In order to optimize the technology of flue gas recirculation sintering and achieve energy saving and emission reduction, under laboratory conditions, the influence of recirculated flue gas oxygen content on sintering quality, flue gas composition, flue gas temperature, metallurgical properties and ore The impact of phase composition. The results show that the vertical sintering rate, yield, productivity and drum strength increase with the increase of oxygen content in the circulating flue gas. When the oxygen content of circulating flue gas is not less than 18%, the variation of oxygen content has a limited impact on the combustion rate of the sintering process. However, the reduction of the oxygen content in the circulating flue gas will reduce the oxygen content in the sintering flue gas and inhibit the sintering of calcium ferrite Generated, the degree of reduction decreased slightly, low temperature reduction pulverization performance is improved. Compared with the baseline, the use of cyclic sintering will extend the material to maintain high temperature and SO2 circulating flue gas enrichment. The oxygen content of circulating flue gas controlled at 18% or more, can be produced good quality indicators, mineral composition reasonable sinter.