转炉钢渣的物理化学和矿物特性分析

 为了合理回收转炉钢渣中的铁，以临钢钢渣为原料，采用光谱半定量全分析、X衍射、扫描电镜、和电子探针等方法分析试样的物理化学和矿物特性，并对原渣的粒度和金属分布进行测定。结果表明：转炉钢渣中主要物相是硅酸二钙、硅酸三钙和熟石灰，含铁物相主要有金属态（Fe）、简单化合态（Fe2O3、Fe3O4、Fe2O3·nH2O和FeCO3等）、铁酸盐（2CaO·Fe2O3等）和固溶体（MgO·2FeO），全铁品位高达23.39%，分布比较分散；钢渣比较难磨且具有选择性破碎特性。研究结果为后续钢渣加工和综合利用提供了依据。

Analysis of Physicochemical and Mineralogical Properties of Converter Slag

In order to recycle the iron resources in converter slag more reasonably, the tests were conducted on converter slag of Lin-fen Steel Limited Company as raw materials. The physicochemical and mineralogical properties of samples were analyzed by semiquantitative spectroscopic analysis, X-ray diffraction (XRD), scanning electron microscope (SEM) and electron-probe microanalyzer（EPMA）, and the mineral phases and characteristics were studied, and the fineness of the ore grinding and the metal distribution ratio was determined by the grinding test. The results show that: the main phases are dicalcium silicate(C2S), tricalcium silicate(C3S) and hydrated lime in the slag; the phases of iron mainly comprised of metallic state (Fe), simplified combination (Fe2O3, Fe3O4, Fe2O3·nH2O and FeCO3 etc), ferrate (2CaO·Fe2O3 etc)and solid solution(MgO·2FeO); the content of the total iron is as high as 23.39% and dispersive in the steel slag; the slag is ground difficultly, and the grinding is processed selectively. The scientific basis would be provided for the subsequent processes and comprehensive utilization of slag.