论文部分内容阅读
白云鄂博铁矿是一种多元素的铁矿石,含有氟、稀土、铌、钾、钠、锰、磷、钍等元素.因此在冶炼时存在着一些冶炼特性和技术问题,高炉结瘤就是其中主要问题之一.结瘤原因有三方面: 1.矿石特性,钾、钠、氟在炉内的循环富集.烧结矿软化温度为1060°C,球团为980°C.炉渣特性是易熔易凝,对温度变化极敏感.2.入炉原料成份波动大,粉末多.3.高炉操作制度与矿石特殊性不相适应.防止结瘤的措施:1.减少入炉粉末,稳定原料成份.2.改革冶炼工艺制度.高炉必须达到顺行.送风制度与原料透气性相适应.3.降低炉渣碱度以利排除钾、钠.4.稳定高炉热制度,免炉温波动.5.降低炉身冷却强度.
The Bayan Obo Iron Ore is a multi-element iron ore containing elements such as fluorine, rare earth, niobium, potassium, sodium, manganese, phosphorus and thorium etc. Therefore there are some smelting characteristics and technical problems in smelting, One of the main problems .Nodule causes in three aspects: 1. Ore characteristics, potassium, sodium, fluorine in the furnace cycle enrichment. Sinter softening temperature of 1060 ° C, pellets 980 ° C. Slag properties are easy Melting easy condensate, very sensitive to temperature changes .2 into the furnace raw material composition fluctuations, powder and more .3 blast furnace operating system does not meet the particularity of the ore to prevent nodulation measures: 1. To reduce the furnace powder, stable materials Ingredients .2 smelting process system reform. Blast furnace must be achieved in line with the blast system to adapt to the raw material permeability .3 reduce slag alkalinity in order to facilitate the removal of potassium, sodium .4 stable blast furnace thermal system, free from fluctuations in temperature. 5. Reduce the furnace cooling strength.