铜炉渣活性激发实验研究及水化机理分析

发布时间：2018-02-24 01:36

本文关键词： 铜炉渣机械活化碱激发充填胶凝剂水化机理　出处：《中南大学学报(自然科学版)》2017年09期 　论文类型：期刊论文

【摘要】：为了实现铜炉渣的回收利用,通过机械活化和碱激发的方式制备铜炉渣胶凝材料,并利用X线衍射(XRD)、扫描电镜(SEM)、能谱仪(EDS)和矿渣玻璃体分相结构模型对铜炉渣水化机理进行分析。研究结果表明:当比表面积为520 m~2/kg时,铜炉渣净浆试样的7 d和28 d强度分别达到2.4 MPa和3.3 MPa;当灰砂比为1:1时,铜炉渣全尾砂充填料的7 d和28 d强度分别达到0.7 MPa和1.0 MPa,满足当地矿山充填的要求。水化初期,炉渣玻璃体中的富钙相和高钙石灰共同水化生成了Ca(OH)2,其进一步与富硅相反应生成C-S-H凝胶等水化产物。随着水化反应的继续进行,试样内部的孔隙逐渐被水化产物填充并缩小至孔状,浆体结构更加致密。
[Abstract]:In order to realize the recovery and utilization of copper slag, copper slag cementitious material was prepared by mechanical activation and alkali excitation. The hydration mechanism of copper slag was analyzed by means of X-ray diffractometer (XRD), scanning electron microscope (SEM), energy spectrometer (EDS) and vitreous structure model of slag. The results showed that the specific surface area was 520mg / kg. The strength of copper slag slurry samples at 7 and 28 days reached 2.4 MPa and 3.3 MPa, respectively, and when the ratio of ash to sand was 1: 1, the strength of copper slag full tailings filling material reached 0.7 MPa and 1.0 MPA respectively, which met the requirements of local mine filling, and the initial hydration stage. Calcium rich phase in slag vitreous and lime with high calcium hydrate together to form CaOH2, which further reacted with silicon-rich phase to form hydration products such as C-S-H gel. The pore inside the sample was gradually filled with hydration products and reduced to pore shape, and the slurry structure became denser.
【作者单位】：北京科技大学金属矿山高效开采与安全教育部重点实验室;北京科技大学土木与环境工程学院;
【基金】：国家自然科学基金资助项目(51374034,51304011,51374035) 国家“十二五”科技支撑计划项目(2012BAB08B02)~~
【分类号】：TQ177

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