Properties and Mechanism of Mine Tailings Solidified and Filled with Fluorgypsum-based Binder Material

作     者：黄绪泉 周旻 

作者机构：Department of Resource and Environmental Science Wuhan University 

出 版 物：《Journal of Wuhan University of Technology(Materials Science)》 (武汉理工大学学报（材料科学英文版）)

年 卷 期：2012年第27卷第3期

页      面：465-470页

核心收录：

学科分类：081902[工学-矿物加工工程] 0819[工学-矿业工程] 08[工学] 

基　　金：Funded by the National High Technology Research and Development Program (863 Project) (No.2009AA064004) the Fundamental Research Funds for the Central Universities (No.5082011 and No.1104003) 

主　　题：fluorgypsum tailings solidification body blast furnace slag toxicity ettringite 

摘      要：The properties and microscopic structure of tailings solidification bodies, the hardening mechanism of the fluorgypsum-based binder material （FBBM） and tailings solidification mechanism were investigated. FBBM consisted of 40% fluorgypsum,25%-50% blast furnace slag,10%-35% ordinary Portland cement clinker（OPCC） and 1% activator, which was good material in binding iron ore *** analysis showed that the properties of tailings solidification bodies was related to its ettringite *** and XRD analyses of tailings solidification bodies showed that the chemical reaction was produced between FBBM and tailings in the whole hydration process. The hydration of the resulting gel material covered the surface of the tailings particles and formed a gel structure. A large number of ettringite crystals and the remaining board-like gypsum crystals took each end and constituted the structural skeleton. The filamentous network-like calcium-silicate-hydrate（C-S-H） gel bonded firmly together with ettringite crystals, dehydrated gypsum crystals and granular tailings, and formed an extremely dense whole.