含TiC炉渣除铁试验研究

Experimental Study of Fe Removal from TiC-containing Slag

含碳化钛炉渣是含钛高炉渣碳热还原的产物,渣中含Fe 1.7%~3.2%。采用SEM分析和试验研究等方法,进行了含TiC炉渣的除铁试验研究。SEM分析结果表明含TiC炉渣中Fe的颗粒尺寸较大,可达150μm,在Fe边部粘连少量TiC;进一步的针对细粒级和粗粒级两种不同规格型号的含碳化钛炉渣,分别进行了湿法和干法磁选除铁试验,结果表明:细粒级含TiC炉渣的湿法除铁效果优于干法除铁效果,但渣中Fe的去除率仍然较低,最高只有54%;粗粒级含TiC炉渣通过磁选,大部分金属Fe与渣中的TiC可以有效分离,采用干法除铁,在0.06 T的磁场强度下,Fe的去除率可达到99%以上,TiC的收得率为86.2%。

The TiC-containing slag,which is produced by carbon reduction of BF slag,containes Fe 1.7% ~ 3.2%.In this paper,the removal of Fe from TiC-containing slag was studied by means of SEM analysis and experimental study.The results of SEM analysis indicated that the particle size of Fe in the TiC-containing slag was large,up to 150 μm,and a small amount of TiC was adhered to the edge of Fe particle.Furthermore,for different sizes of fine and coarse TiC-containing slag,the experiments of magnetic separation and removal of Fe by wet and dry methods were carried out respectively.The results showed that for the fine TiC-containing slag,although the effect of removing Fe by wet method was better than that by dry method,the removal rate of Fe in slag was only 54%.And for the coarse TiC-containing slag,it could be separated effectively by magnetic separation.Under the magnetic strength of 0.06 T,the removal rate of Fe could reach more than 99%,and the recovery of TiC was 86.2%.