论文部分内容阅读
由于鞍钢转炉钢渣存在体积安定性不良等问题,严重制约了钢渣的再利用途径和范围。采用扫描电子显微镜的X射线能谱仪等手段观察了鞍钢转炉渣的矿物形貌,测定了矿物的元素成分,并对不同时期转炉渣中f-CaO与f-MgO的含量进行化学分析,以明确f-CaO、RO相和f-MgO等对钢渣安定性的影响规律。结果表明:1)鞍钢转炉钢渣中主要矿物相为C2S、铁铝钙、镁铁相固溶体和少量C3S、f-CaO与f-MgO;2)鞍钢转炉渣中RO相的主要组织为镁铁相,质量分数为10%~20%,MgO/FeO的典型比例约为1∶2;3)鞍钢转炉渣f-CaO质量分数为2.08%~7.79%,f-MgO质量分数为0.16%~0.41%;4)微观形貌和化学分析结果均证明鞍钢转炉钢渣安定性的主要影响因素为f-CaO含量;5)游离氧化镁的单相组织极少,对转炉渣的安定性影响主要取决于RO相。
Due to the poor volume stability of Ansteel converter slag, etc., the ways and scope of reuse of slag are severely restricted. The morphology of converter slag in Ansteel was observed by means of X-ray photoelectron spectroscopy (SEM), the elemental composition of the minerals was measured, and the contents of f-CaO and f-MgO in converter slag at different periods were analyzed by Clear f-CaO, RO phase and f-MgO on the stability of steel slag law. The results show that: 1) The main mineral phases of Ansteel converter slag are C2S, Fe-Al-Ca, Mg-Fe solid solution and a small amount of C3S, f-CaO and f-MgO; , The mass fraction of MgO / FeO is about 1: 2; the mass fraction of f-CaO in Ansteel converter slag is 2.08% -7.79%, the f-MgO mass fraction is 0.16% -0.41% ; 4) The results of micro-morphology and chemical analysis all prove that the main influencing factor of Ansteel slag stability is f-CaO content. 5) The single phase microstructure of free magnesia is very little and the stability of converter slag depends on the RO phase.