云母类矿物影响铁精矿球团的研究

通过人工模拟程潮铁精矿的组分进行球团试验。查明了云母类矿物对鄂东地区铁精矿成球性能影响的基本规律。与该地区铁精矿粒度越细，成球性越差的现象吻合。通过云母矿物影响鄂东地区铁精矿高温性能的研究发现；云母矿物对熟球的抗压强度有一定影响。对湿球的静焊温度影响比较明显，且随云母矿粉细度增加，静焊温度降幅增大。     

宣钢竖炉球团使用巴西精矿的试验研究

介绍了宣钢使用巴西MBR精矿进行造球试验及工业试验的情况。在宣钢现有原料条件下，配加15%的巴西精矿是可行的，炼铁综合效益有所提高。     

稀土含油尼龙衬板在宣钢球团生产中的应用

1998－1999年，宣钢竖炉车间在精矿仓和圆盘造球机上采用了稀土含油尼龙衬代替原来的瓷砖衬板，彻底解决了料仓粘料问题，并使生球产质量得以提高。     

Pellets Prepared with Mechanically Activated Iron Ore

This work analyses pellets prepared with iron ore that has been mechanically activated by high energy ball milling. Pellet feed iron ore was submitted to high‐energy ball milling for 60 minutes, and the resulting material was analysed through measurements of particle size and specific surface area, as well as X‐ray diffraction. Pellets were prepared from this material. The pellets were heated at temperatures ranging from 1000 to 1250°C in a muffle furnace, and submitted to the maximum temperature during 10‐12 minutes. The samples were then tested regarding crushing strength, densification and porosity, and were examined in a scanning electronic microscope. The results were compared to those obtained with similar samples made from non‐milled pellet feed. It has been shown that through high‐energy ball milling of iron ore it is possible to achieve pellets presenting high densification and compressive strength at firing temperatures lower than the usual ones.     

不同配比下PMC矿粉和司家营矿粉造球工艺试验研究

为了确定PMC矿粉和司家营矿粉两种矿粉造球的最佳配比,利用实验室的球团设备对两种矿粉在不同配比下的球团工艺进行了试验研究.研究发现,在PMC矿粉∶司家营矿粉=8∶2的配比下,生球的成球率为91%,落下强度为4.15次/0.5 m个,抗压强度为0.825 d N,爆裂温度为440℃;成品球团的抗压强度接近300 d N,并且通过对PMC矿粉∶司家营矿粉=8∶2时成品球团矿的显微结构的观察发现,此配比下的球团矿矿相以赤铁矿为主,晶粒分布密集且联结成片,成品球团矿的抗压强度最高.因此,PMC矿粉:司家营矿粉=8∶2时为最优方案.     

Drying and preheating processes of iron ore pellets in a traveling grate

A mathematical model of drying and preheating processes in a traveling grate was presented based on the laws of mass, momen- tum, heat transfer, and drying semiempirical relations. A field test was systematically carried out in a traveling grate. The effects of pellet diameter, moisture, grate velocity, and inlet gas temperature on the pellet bed temperature were studied. The average relative error between actual measurements and simulations is less than 7.97%, indicating the validity of the model.     

程潮铁精矿球团质量影响因素分析

以程潮铁精矿为原料进行造球试验,考察铁精矿粒度、膨润土种类及配比、造球水分和造球时间对球团质量的影响。结果表明,这几种因素对生球的落下强度、抗压强度和爆裂温度均有很大的影响;当程潮铁精矿中-0．074 m m粒级含量为85．10％、膨润土A配比为1．5％、造球水分为8％、造球时间为12 m in时,能得到生球落下强度为9．8次/（0．5m）、抗压强度为20．5N/个、生球爆裂温度为467℃的优质球团矿。     

酒钢2×8m~2球团竖炉提高利用系数的生产实践

酒钢2×8m2球团竖炉自投产以来,不断地进行配矿研究、设备改造和操作方法的改进,使竖炉利用系数不断提高,大大缓解了高炉对球团产能的压力。     

我国球团厂建设中的几个问题

从我国发展球团矿生产的目的和意义、球团原料、所采用工艺及设备、规模、操作及管理等方面。对我国球团项目建设中的若干问题进行了讨论。     

造粒粒度分布及其预测模型

以造粒粒度分布为研究对象,通过原料粒度及粒度分布、水分质量分数对造粒粒度分布影响的实验室研究,改进和优化烧结生产工艺,提出一套合理的烧结生产控制模型,以实现烧结生产的自动化控制和造粒粒度分布的预测。研究结果:在适宜的造粒水分范围内,随水分质量分数的增加,造粒粒度增加;但当水分质量分数过大时,造粒粒度反而减小。原料粒度对造粒粒度的影响是主要因素,而水分质量分数对造粒粒度的影响是次要因素。由造粒粒度分布数学模型得出的预测值与试验值之间有较好的一致性,原料粒度分布为正态分布时造粒粒度分布也为正态分布,并且造粒粒度分布的质量概率密度函数可由原料粒度分布的质量概率密度函数和原料粒度分割系数确定。