首钢京唐公司超厚料层烧结的试验分析  

Experimental analysis on ultra-deep bed sintering in Shougang Jingtang

作　　者：陈绍国 张晓臣 梁洁 王冬青 潘文 张亚鹏 CHEN Shao-guo;ZHANG Xiao-chen;LIANG Jie;WANG Dong-qing;PAN Wen;ZHANG Ya-peng(Research Institute of Technology,Shougang Group Co.,Ltd.,Beijing 100043,China;Beijing key Laboratory of Green Recyclable Process for Iron and Steel Production Technology,Beijing 100043,China)

机构地区：[1]首钢集团有限公司技术研究院,北京100043 [2]绿色可循环钢铁流程北京市重点实验室,北京100043

出　　处：《中国冶金》2023年第3期94-102,共9页China Metallurgy

摘　　要：厚料层烧结技术可在不增加燃料用量的条件下使烧结矿转鼓强度提高,从而提高烧结矿成品率。通过烧结杯试验定量研究了在不同料层厚度和超厚料层条件下降低焦粉配比对料层透气性、料层热量分布、烧结矿产量和质量、吨矿烧结烟气排放量和吨矿烧结污染物排放量等烧结排放指标的影响,并对超厚料层烧结适宜的焦粉配比进行了探究。结果表明,烧结料层厚度由800 mm逐步增加至950 mm时,在相同焦粉配比条件下增加烧结料层厚度可大幅度改善烧结矿产量和质量以及各项烧结指标,从而为降低焦粉配比创造条件。当料层厚度为950 mm和焦粉配比为4.3%时,除垂直烧结速度和烧结利用系数有所降低外,可获得与料层厚度为800 mm和焦粉配比为4.5%时相当的烧结矿产量和质量以及烧结矿成品率和低温还原粉化指数等烧结指标。同时,烧结固体燃耗显著下降约6%,吨矿烧结烟气排放量和吨矿烧结污染物排放量大幅度下降,其中,吨矿NO排放量下降了24%,吨矿SO_(2)排放量下降了35%。Deep bed sintering technology can improve the sinter drum strength without increasing the amount of fuel, thereby increasing the sinter yield ratio. The effects of reducing coke addition ratio on bed permeability, bed heat distribution, sinter yield and quality, flue gas emission volume per ton of sinter, and pollutant emission per ton of sinter were quantitatively studied by sintering cup test under different bed height and ultra-deep bed height, and suitable coke addition ratio for ultra-deep bed sintering was explored. The results show that, when the height of sinter bed is gradually increases from 800 mm to 950 mm, increasing the bed height under the same coke addition ratio can greatly improve the sinter yield and quality and various sintering indexes, thus creating conditions for reducing the coke addition ratio. When the height of sinter bed is 950 mm and the coke addition ratio is 4.3%, except the decrease of vertical sintering speed and sintering utilization coefficient, sintering indexes such as sinter yield and quality, sinter yield ratio and low temperature reduction pulverization index can be obtained, which are equivalent to the indexes of sinter bed height of 800 mm and the coke addition ratio of 4.5%. Meanwhile, sintering solid fuel consumption decreases by about 6%, flue gas emission volume per ton of sinter and pollutant emission per ton of sinter decrease significantly, NO and SO_(2) emission amount per ton decreases 24% and 35%, respectively.

关 键 词：超厚料层烧结 料层透气性 料层温度 烟气排放 NO SO_(2) 

分 类 号：TF046.4[冶金工程—冶金物理化学]