高比例扬迪粉烧结优化试验研究

Study on sintering optimization with high ratio of YANDI^(TM) fines

介绍了扬迪粉(YD粉)烧结配矿优化试验情况及不同硅源对高YD粉配比烧结过程的影响。试验结果表明:用具有高孔隙度的YD矿替代B粉、C粉和E粉后,混合料水分应适当提高,以改善混匀制粒效果。因原料装料密度降低,使原始料层透气性得到改善,烧结生产率得到提高,烧结矿还原性略有改善,TD-TS区间和TD-Tm区间均呈现变窄趋势,这有利于改善高炉透气性和降低焦比,但烧结矿TI和成品率呈下降趋势,固体燃耗略有升高。当YD粉配比增加到30%时,不同的硅源对烧结指标的影响较大。

Sintering optimization for blends containing high ratio of YANDITM fines have been studied at Masteel Technology Center.Experimental results show that replacing ores B,C and E with high porosity YANDITM fines,the moisture of sinter mix should be increased so as to improve granulation.Due to the lower density and higher porosity when YANDITM ore is used,the green bed permeability can be improved and therefore sintering productivity increased.Sinter RI improved and softening and melting temperature ranges TD-TS and TD-Tm trended narrower which are benefial to BF permeability and fuel saving.However,sinter TI and yield trended down and solid fuel rate increased slightly.For an ore blend with YANDITM level fixed at 30 %,the sintering behaviour with different high SiO2 sources was evaluated.Various high SiO2 additions exhibited different effects on sinter quality and operations depending on their chemistry and physical size.