高活性安定性钢渣在线调控及其动态化学重构机理研究

利用熔融钢渣显热进行钢渣“在线重构”的技术思路，是解决钢渣化学组成波动大，胶凝活性低和安定性差等问题的有效途径。但是，调质组分和熔融钢渣的均混和调控是实现钢渣在线重构的关键科学问题。本课题拟以转炉钢渣为研究对象，模拟熔融钢渣在线重构过程，根据硅酸盐水泥熟料相图、矿物结构及目标成分，优化调质组分设计，确定温度制度等重构关键参数，分析重构钢渣“化学成分-温度-粘度”的关系，建立成矿动力学和热力学模型；研究均混手段（内部和外部均混）、气氛条件（氧化、还原和惰性）、工艺措施（温度调节、鼓气位置）等对在线调控钢渣的流变特性、温度场分布、扩散特征的影响规律，建立各因素下扩散动力学、非等温析晶动力学以及反应热力学的关系模型，探明钢渣动态化学重构机理；基于提升活性安定性，提出一种在线调控钢渣的新工艺技术。研究成果将充分利用熔融钢渣显热，提供一种崭新的钢渣高效利用的途径，为冶金渣建材化高效应用提供理论基础。

The on-line reconstruction of molten steel slag by using its sensible heat is proposed as one of the most promising approaches to solve the variation in chemical composition, low activity and poor stability of slag. However, the mixing and regulation of molten slag and the conditioning components are the key scientific problems for the on-line reconstruction of steel slag. In the present study, converter steel slag is proposed to be the research object for simulating on-line reconstruction process of the molten steel slag. According to the phase diagram of Portland cement clinker, mineral structure and target composition, the design of conditioning components will be optimized, and the key parameter such as reconstruction temperature will be determined. A metallogenic dynamics and thermodynamics model will be set up by analyzing the relationship of "viscosity - temperature - chemical composition" of steel slag. The influence of mixing methods (internal and external mixing), atmosphere conditions (oxidation, reduction and inertia), and process measures (such as temperature control, drum gas position) on rheological properties, temperature field distribution, diffusion characteristics of on-line regulation of steel slag will be investigated, and the relation model of diffusion dynamics, non-isothermal crystallization kinetics and reaction thermodynamics under the various factors will be established. Moreover, the dynamic chemical reconstruction mechanism of slag will be ascertained. Based on the promotion of activity and stability of the slag, a new technology of on-line regulation of steel slag is provided. The research results will make full use of the molten steel slag sensible heat and provide a new way of efficient utilization of steel slag, which provides a theoretical basis for efficient application of building materials, and metallurgical slag.