不锈钢渣是不锈钢冶炼的副产品，因含铬而限制了其作为二次资源在其他领域的应用。目前，控制不锈钢渣中Cr6+溶出的主要措施是添加熔剂对不锈钢渣调质以提高铬在尖晶石矿物中的富集程度。铁铬尖晶石作为铬铁矿的主要矿物，是非常稳定的矿物相，不仅难溶于水，而且难以被氧化。研究FeO或Fe2O3（FeO/Fe2O3）对Cr6+溶出的抑制行为及其机理对不锈钢渣的无害化和资源化具有重要意义。本项目拟研究CaO-MgO-SiO2-Al2O3-Cr2O3-FeO/Fe2O3体系中铬尖晶石形成的理论基础，探明铬尖晶石晶体物化性质的变化规律及其动力学机理，揭示铬赋存状态的变化规律，探索Cr6+的溶出行为及FeO/Fe2O3抑制Cr6+溶出的机理，为利用FeO/Fe2O3控制不锈钢渣中Cr6+溶出以实现不锈钢渣资源化提供理论依据。

The stainless steel slag is the by-product of stainless steel-making, while the chromium contained in stainless steel slag hinders the utilization of the slag in other fields. At present, it is the major treatment method that some kinds of fluxes are added into the molten stainless steel slag for enhancing the chromium enriched in the spinel phases. The spinel FeCr2O4 as the main mineral phase of chromite is quite stable, which is practically insoluble in water and difficult to be oxided. The investigation of effect of FeO/Fe2O3 on hexavalent chromium elution from stainless steel slag and its mechanism is of great significance for the innocuous treatment and comprehensive utilization of stainless steel slag. In this project, the basic theory of Cr-spinel formation in the system of CaO-MgO-SiO2-Al2O3-Cr2O3-FeO/Fe2O3. The variation of physicochemical properties of Cr-spinel crystals and its kinetics mechanism are investigated. In addition, the occurrence state of chromium in the synthetic slag is studied. Moreover, the elution of hexavalent chromium and the mechanism of prevention of Cr6+ elution from stainless steel slag by FeO/Fe2O3 are explored. The theoretical basic is provided to suppress the elution of hexavalent chromium from stainless steel slag in order to promote friendly reutilization of stainless steel slag.