LAN Rong-zong
,
WANG Jing-song
,
HAN Yi-hua
,
SHE Xue-feng
,
WANG Lin-tao
,
XUE Qing-guo
钢铁研究学报(英文版)
In order to explore the behavior laws of sinter reduction in TGR-OBF (top gas recycling-oxygen blast furnace), reduction experiments of sinter have been conducted by thermal balance mass loss method with different atmospheres, temperatures and volume flows. The changes of RI (reduction degree of Fe2O3), RI′ (reduction rate of Fe2O3) and r (reduction degree of FeO) have been examined. The results show that the reduction of sinter was significantly improved under TGR-OBF atmosphere, and the RI and r were measured up to 98.2% and 97.8% at 900 ℃ respectively. With increasing of the reduction temperature, the reduction of sinter speeded up greatly, and the reduction time-duration shortened from 117 min at 900 ℃ to 63 min at 1100 ℃. Moreover, the reduction of sinter enhanced with increasing of the reductive gas flow. When the flow increased from 10 to 15 L/min, the initial reduction rate of sinter increased from 2.47%/min to 3.73%/min. While increasing H2 and CO contents in the reductive atmosphere, the reduction of sinter was promoted. Besides, H2 influenced more evidently than CO to the reduction of sinter, especially in the later stage of the reduction process, for instance, the reduction of wustite will be improved enormously when increasing the H2 content in the reductive atmosphere.
关键词:
oxygen blast furnace
,
sinter
,
reduction
刘成伟，欧阳代刚，刘清才，卫敏，胡钢，陆震
钢铁
研究了在烧结混料时运用喷吹轻烧白云石粉工艺，以及不同轻烧白云石粉添加量、水分添加量对烧结混料情况、混料机粘料率和烧结矿冷态强度的影响规律。在此基础上与传统熔剂的添加工艺进行了比较分析并进行了烧结杯试验研究。结果表明：采用喷吹方式加入轻烧白云石粉，与传统配入方式相比，烧结混料情况改善，混合料制粒效果和混匀情况变好，同时粘料率降低0.69%~0.97%，烧结矿的冷态强度略有升高，但变化不大。得出保证烧结矿最佳混料情况和冷态强度的轻烧白云石喷吹量为4.64%，最佳喷吹位置为一混时及w(H2O)=7.5%时。
关键词:
喷吹
,
sinter
,
light-burned dolomite
,
cold strength
赵志星，安钢，裴元东，赵勇，潘文
钢铁
针对首钢京唐550m2烧结机的投产进行了优化配矿研究。首先，根据首钢铁矿粉资源，对多种铁矿粉的烧结性能，尤其是其高温特性进行了研究；根据澳洲矿、巴西矿和国内精粉在同化性与液相流动性能方面高低互补的配矿原则，确定了矿粉搭配结构的基本范畴，即澳粉（50％～60％）＋巴西粉（40％～30％）＋适量地方粉（10%左右）；然后，根据铁矿粉烧结性能研究结果，设计了9组优化配矿方案，并进行了烧结杯试验，从而确定了开机方案：巴西南部粉（20%）+巴西北部粉（10%）+半褐铁矿（20%）+褐铁矿（35%）+地方粉（15%）；再者，进行了碱度、白灰配比、水分、料层等烧结工艺参数的优化试验。烧结杯试验结果表明，适合当前京唐条件下的工艺参数为：二元碱度1.90~1.95，白灰配比5%，水的质量分数控制在7.0％；料层可逐步提高至800mm。最终，首钢京唐烧结厂顺利投产并稳定生产，料层厚度达到800mm，烧结各项技术指标先进。
关键词:
铁矿粉
,
sinter
,
deep bed
,
optimizing ore blending
,
process parameter
