LI Hongge
,
ZHANG Jianliang
,
PEI Yuandong
,
ZHAO Zhixing
,
MA Zejun
钢铁研究学报(英文版)
The whole melting curve of iron ore during sintering process was obtained, and the melting characteristics of iron ore were defined and explained. The whole melting process of mixture, mixed by iron ore and CaO reagent at basicity of 20 and 40, respectively, was observed using a SiC heating furnace with camcorder unit, and the melting curves of mixture that were relative height vs temperature curves were obtained. Besides, the melting characteristics of iron ore during sintering were introduced through defining some points in the melting curves, such as liquid forming temperature, inflexion temperature and flowing temperature, and the meaning of different shapes of the melting curves was clarified.
关键词:
iron ore
,
sintering
,
melting characteristic
,
melting curve
Francik Przemystaw
,
Jan Mróz
钢铁研究学报(英文版)
A procedure for evaluating the susceptibility of raw materials for the process of sintering of ironore mixes is presented. The procedure relies on the evaluation of the amount and quality of the finest grain fraction. The method is based on determination of particular grain fractions. For the grain less than 015 mm, the determination of the amount is performed using an IPS (Infrared Particles Sizer) grain size analyzer and for the grain larger than 015 mm, the fraction is determined using the (wet and dry) screening methods. This allows for quantity assessment of the quality of material in terms of its susceptibility to selfpelletizing by calculating Total Ability for SelfPelletizing (TASP) index fT. The presented method, in combination with the grain size and chemical analyses, can serve for evaluation of suitability of raw material and mixes for the sintering process. Furthermore, the TASP index for 10 types of iron ores and concentrates was determined. The usability of the TASP index was verified by determination of its impact on yield of sintering process both in laboratory and in industry scale.
关键词:
iron ore
,
concentrate
,
grain composition
,
pelletization process
,
sintering process productivity
刘洪波
,
郭兴敏
钢铁研究
doi:10.13228/j.boyuan.issn1001-0963.20130381
作为改善烧结矿低温还原粉化性能的基础,通过对不同氧分压下的赤铁矿进行热重分析,并结合显微镜下面积法,研究了赤铁矿的分解和二次赤铁矿的生成机理.实验结果表明:二次赤铁矿生成过程中自身存在大量裂纹,是产生低温还原粉化的主要因素,而气氛和温度是影响二次赤铁矿生成的重要因素;实验还获得了不同氧分压下二次赤铁矿的生成规律以及赤铁矿、磁铁矿、二次赤铁矿之间的转化关系,为降低烧结矿低温还原粉化率,合理控制烧结气氛和烧结温度提供了实验依据.
关键词:
铁矿石
,
低温还原粉化
,
氧分压
,
二次赤铁矿
