低硅炼铁工艺条件下铁沟用耐火材料的改进及应用

发布时间：2018-03-21 13:42

本文选题：低硅炼铁　切入点：铁沟浇注料　出处：《耐火材料》2017年02期 　论文类型：期刊论文

【摘要】：针对高炉实施低硅炼铁工艺后因铁水黏度低、流动性强致使主铁沟部位侵蚀加快、冲刷加剧的问题,以电熔致密刚玉、电熔白刚玉粉、碳化硅、α-Al_2O_3微粉、β-Si3N4粉、炭素、纯铝酸钙水泥、Si O2微粉及高效复合减水剂等制备了铁沟浇注料,研究了15~8 mm的大颗粒电熔致密刚玉的加入量(外加质量分数分别为5%、10%、15%)和β-Si_3N_4粉的加入量(质量分数分别为2%、4%、6%)对浇注料性能的影响。结果表明:将主沟浇注料分为外加10%(w)15~8 mm的电熔致密刚玉的铁线浇注料和引入6%(w)β-Si_3N_4的渣线浇注料,并适当调整主沟坡度,在内蒙某1 080 m~3低硅炼铁的高炉铁沟上应用后表明,大大改善了主铁沟渣铁线部位侵蚀加快、冲刷加剧的问题,一次性通铁量由10万t提升至15万t。
[Abstract]:In view of the problem that the erosion of the main iron trench is accelerated and the erosion is intensified due to the low viscosity of hot metal and the strong fluidity of hot metal in blast furnace, the fused dense corundum, fused white corundum, silicon carbide, 伪 -Al2O3 micropowder, 尾 -Si3N4 powder, carbon, etc. Iron ditch castable was prepared by pure calcium aluminate cement, Sio 2 powder and high efficiency composite water reducing agent. The effects of the addition amount of 158mm large particle fused dense corundum (5% added mass fraction respectively) and 尾 -Si3N4 powder on the castable properties were studied. The results showed that the main channel castable was divided into external castables. Adding 10 pieces of wire castables for fused dense corundum with 158mm electric melting and introducing 6 wk) 尾 -Si3N4 slag line castables, By adjusting the slope of the main ditch and applying it to the iron ditch of a 1 080mm3 low silicon ironmaking blast furnace in Inner Mongolia, it is shown that the problem of accelerating the erosion of the slag and iron wire in the main iron ditch is greatly improved, and the one-time iron flux is increased from 100,000 t to 150,000 t.
【作者单位】：通达耐火技术股份有限公司;
【分类号】：TF576.4;TQ175.7

【相似文献】