硅酸盐学报Issue(8)：1142-1150,9.DOI:10.7521/j.issn.0454-5648.2013.08.18
钢渣中二价金属氧化物固溶体的选别性研究
Separation of Divalent Metal Oxides Solid Solution from Steel Slag
摘要
Abstract
In order to solve the problem of using steel slag with a low hydraulic activity, a possibility of removing the inert mineral RO phase (divalent metal oxides solid solution) from steel slag was investigated. The petrography characteristics of the steel slag samples were examined. The mechanical properties, mass susceptibility and specific resistance of RO phase and its associated minerals were analyzed that were experimentally verified by steel slag beneficiation.The results show that the percentage of RO phase in the steel slag is 20%–30%, and the average particle size is 31–45μm. The RO phase is a hard constituent with the greatest density in the mineral composition, and it concentrates in the coarse fraction and the heavier components of steel slag powder. The RO phase content in the coarse fraction is 2.3 times greater than that of the fine fraction after air classification by a swirling separator. Since the RO phase belongs to a medium magnetic mineral, and the associated minerals belong to non-magnetic minerals, the RO phase can be separated by a magnetic separator with medium magnetic intensity. The RO phase can be also recycled by electrostatic separation due to its electric conductivity. The higher FeO/MgO mole ratio in RO phase’s chemical composition is, the more efficient separation process will be. Oxidizing roasting of the steel slag manifests beneficial effect to magnetic separation of RO phase, but unfavourable function for electrostatic separation.关键词
钢渣/二价金属氧化物固溶体/重力分离/磁力分离/静电分离/选别性Key words
steel slag/divalent metal oxides solid solution/gravity separation/magnetic separation/electrostatic separation/selectivity分类
化学化工引用本文复制引用
侯新凯,贺宁,袁静舒,董跃斌,杨洪艺..钢渣中二价金属氧化物固溶体的选别性研究[J].硅酸盐学报,2013,(8):1142-1150,9.基金项目
山西省科技创新项目(2013101038)资助。 （2013101038）
