化学添加剂对全尾砂胶结充填材料性能的影响及机理研究

项目名称： 化学添加剂对全尾砂胶结充填材料性能的影响及机理研究

项目编号： No.51274174

项目类型： 面上项目

立项/批准年度： 2013

项目学科： 矿业工程

项目作者： 郑娟荣

作者单位： 郑州大学

项目金额： 80万元

中文摘要： 以典型全尾砂（富含硅、铝、铁、硫等）为研究对象，采用固定变量法、正交试验法和对比试验法，在实验室系统研究化学添加剂对全尾砂胶结充填材料性能的影响。研究目标是通过化学添加剂（如分散剂、减阻剂等）的作用，提高全尾砂胶结充填料浆（固体浓度75%~85%）在自流输送或管道挤压输送过程的流动性及在输送过程并进入充填采场后其中细颗粒的分布均匀性；通过研究化学添加剂（如碱性激发剂和早强剂等）、充填专用胶凝材料和全尾砂各组成的颗粒级配和化学活性的匹配及调控技术，使充填体中细尾砂颗粒产生固结反应，将充填体中胶凝材料掺量降为固体总质量的3%~6%。采用现代科学研究方法[如L型管道自流输送或管道挤压输送和水槽试验；环境扫描电镜（ESEM）和能量散射X射线能谱分析（EDXA）]和根据相关学科的基本理论，揭示化学添加剂对全尾砂胶结充填料浆流变性能和强度性能的影响机理，为我国开发应用低成本全尾砂胶结充填材料提供理论依

中文关键词： 粗细尾砂胶结膏体充填材料；化学添加剂；流动性（坍落度;泌水率）；抗压强度；微结构

英文摘要： Systematic research on the influence of chemical addition agents on rheological properties and compressive strengths of total tailing cemented backfill materials will be carried on in test room based on typical total tailing sands (i.e. rich in silicon, aluminum, iron, sulfur and so on ) by research methods of fixed parameters and cross experimental design and comparison test. The research targets are that the fluidity of total tailing cemented backfill materials (solid content 75%~85%) during gravity-transport or pipeline squeezed-transport and the distribution homogeneity of fine particles in backfill materials during the transport and after entering backfill place will be elevated by the influences of chemical addition agents (such as dispersant, drag-reducing agent and so on ); the content of cementing material in total tailing cemented backfill materials will be reduced to 3%~6% of total solid content by the research on the grain grading and chemical reactivity matching and modulation methods among chemical addition agents(such as alkaline reactant and accelerator and so on) and cementing materials specially used backfill and total tailing sands in order to solidifying reaction of fine tailing sands in backfill materials. The mechanism of the influences of chemical addition agents on the rheological proper

英文关键词： cemented Paste backfill of coarse or fine tailings；chemical addition agents；flowability (i.e. slump and bleeding rate)；compressive strengths；micro-structure