摘要
以某钢厂钢渣尾渣为研究对象,采用精细还原实验方法对渣中铁元素的回收利用进行研究。首先将尾渣细磨至>80目和>400目微米级的粒度,并进行XRF-荧光分析、化学分析以及XRD分析,确定渣中主要成分及其含量以及化合物存在形式主要为FeO、2CaO·SiO_2、Ca_2Fe_2O_5、(Mg,Fe)_2SiO_4。将细磨后的钢渣尾渣进行精细还原实验,实验结果表明:>400目的炉渣在1 000 ℃下,经4h的还原,能够达到更高的还原度;对还原前后的炉渣进行粒度分布测定,结果显示还原前后炉渣粒度并未发生明显变化,平均粒度均在5 μm左右,粒径分布为0.4～40 μm,表明还原过程中炉渣颗粒之间未发生烧结,还原产物仍为粉状,为采用物理方法将铁元素与其他杂质元素进一步分离提供了依据。
In this study, steel slag tailings from some steel works are taken as the research subject for the recycling study of Fe in the tailings by precise reduction method. First, the tailings are grinded to the micron size of〉80 mesh and 〉400 mesh. Then, through XRF-fluorescence analysis, chemical analysis, the main components and their contents in the tailings are determined and according to the XRD analysis, the main elements exist mainly in the form ofFeO, 2CaO·SiO2, Ca2Fe2O5, （Mg, Fe） 2SIO4 and so on. Then, the railings after fine grinding are used for the precise reduction experiment, and the result shows that at the temperature of 1 000℃, after 4 hours＇ reduction, 〉 400 mesh tailings can achieve higher reduction degree. After the reduction, the product is taken for the particle size distribution determination, the result indicates that the particle size distribution changes little before and after the reduction, the average particle size is about 5μm and the distribution ranges from 0.4μm to 40μm, which means that sintering does not occur between particles during the reduction, and the reduction product keeps powder state, making it possible to separate the iron from other elements by physical method.
出处
《工业加热》
CAS
2011年第6期32-35,共4页
Industrial Heating
关键词
钢渣尾渣
非熔态
精细还原
Steel slag tailings
Non-molten state
Precise reduction
