【摘要】 准确测定钢渣中的磁性铁含量有利于提高钢渣磁选效率和评价磁选工艺的磁性铁回收效率。实验采用多级磁选分离的方法,通过测定钢渣磁选物以及尾渣的密度,并假设钢渣磁选物中非磁性相的密度与尾矿渣的密度相同,从而达到测定钢渣中的磁性铁含量的目的。实验选取了转炉渣、脱硫渣作为研究对象,分别测得两种钢渣的磁性铁含量为3.81%和3.72%(质量分数),平均误差为3.93%,并使用了行业标准(YB/T 140和YB/T 4188-2009)验证了测定结果的可靠性。XRD测定结果表明,磁选物的物相中含有较多磁性物,且钢渣的物相与尾渣一致,证明了测定方法假设是可行的。更多还原

【Abstract】 The accurate determination of magnetic iron in steel slag is significant to enhance the recovery rate and efficiency of magnetic separation.A method was put forward for the determination of the magnetic iron in slag by multi-level magnetic separation through measuring the density of magnetic concentrate of steel slag and tail slag,on the assumption that the density of the non-magnetic phases in the magnetic concentrate of steel slag was the same as density of tail slag.Converter slag and desulfurization slag were tested.The magnetic iron in these two slags was found as 3.81% and 3.72%(mass fraction),respectively,and the average error was 3.93%.Then,two industrial standards(YB/T 140 and YB/T 4188-2009)were offered to verify the reliability of test results.XRD results proved there were many magnetic phases present in magnetic concentrate and the major phases in steel slag was similar with the phases in tail slag,indicating that this method was feasible.更多还原