钢铁冶金渣和脱硫石膏协同固铅的矿物学机理研究

This project will check the mineralogical mechanism of lead stabilization in the cementing system formed by hydrating reaction between Blast Furnace Slag (BFS), Steel slag and Gypsum from Flue Gas Desulfurization (GFGD). This will provide a fundamental mineralogical knowledge which will further improve the ability on stabilizing lead and other heavy metals by this system. It will also help to further improve the suitability on using this cementing agent in the process of backfill mining by upgrading the flow ability, the rheological characteristics, time of setting and hardening, and strength development. The knowledge of this fundamental mineralogical mechanism not only can promote the development of technology of much environmentally safe large scale underground backfill mining by using tailings and waste rocks from nonferrous and precious metals mining and ore dressing, but can also provide some basic mineralogical knowledge for a safe underground treatment of more dangerous hazardous materials such as mud from water treatment, GFGD and some slag of nonferrous metals metallurgy. Following research contents will be included in this project: (1) Study on the hydration process by a coordinative effect of cementing reaction between BFS, steel slag and GFGD; (2) study on the mineralogical mechanism of lead stabilization by an effect of "isomorphic quantum field effect of tetrahedral coordination of silicon by oxygen" during the hydration process of the system; (3) study on the mineralogical mechanism of lead stabilization by an effect of "complex salts crystallization" during the hydration process of the system; (4) study on the mineralogical mechanism of lead stabilization by the coordinative effect of C-S-H gel formation, isomorphic quantum field effect of tetrahedral coordination of silicon by oxygen, and effect of complex salts crystallization.

本项目通过揭示矿渣-钢渣-脱硫石膏胶凝体系固铅的矿物学机理，为进一步提高这个体系胶结剂固化铅等重金属的能力和进一步适合胶结充填采矿对新拌浆体流动性、流变性、凝结硬化、和强度发展需求奠定理论基础。这个理论基础的建立不仅对安全地大规模采用有色和稀贵金属尾矿、废石用于地下胶结充填采矿具有重要推动作用，还可能为地下胶结充填采矿协同安全处置高重金属污泥、脱硫石膏和冶炼渣等危险固体废弃物奠定初步的矿物学基础。主要研究内容包括：1）矿渣-钢渣-脱硫石膏协同水化作用过程及产物研究；2）体系水化过程中硅的四配位同构化效应固铅的矿物学机理研究；3）体系水化过程中复盐效应固铅的矿物学机理研究 4）矿渣-钢渣-脱硫石膏胶凝硬化体系中C-S-H 凝胶的形成、硅的四配位同构化效应和复盐效应协同固铅的矿物学机理研究。

本项目通过揭示矿渣-钢渣-脱硫石膏胶凝体系固铅的矿物学机理，为进一步提高这个体系胶结剂固化铅等重金属的能力和进一步适合胶结充填采矿对新拌浆体流动性、流变性、凝结硬化、和强度发展需求奠定理论基础。这个理论基础的建立不仅对安全地大规模采用有色和稀贵金属尾矿、废石用于地下胶结充填采矿具有重要推动作用，还可能为地下胶结充填采矿协同安全处置高重金属污泥、脱硫石膏和冶炼渣等危险固体废弃物奠定初步的矿物学基础。主要研究内容包括：1）矿渣-钢渣-脱硫石膏协同水化作用过程及产物研究；2）体系水化过程中硅的四配位同构化效应固铅的矿物学机理研究；3）体系水化过程中复盐效应固铅的矿物学机理研究 4）矿渣-钢渣-脱硫石膏胶凝硬化体系中C-S-H 凝胶的形成、硅的四配位同构化效应和复盐效应协同固铅的矿物学机理研究。