首页|机械粉磨联合化学剂激发高炉钛渣基胶凝材料水化活性

机械粉磨联合化学剂激发高炉钛渣基胶凝材料水化活性

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以钒钛磁铁精矿冶炼过程产生的高炉钛渣为原料,联合机械粉磨和化学剂激发高炉钛渣的水化活性,过程采用XRD(X射线衍射)、FTIR(红外光谱)、SEM(扫描电镜)、激光粒度仪等分析高炉钛渣颗粒群矿物组成、晶体结构和粒径分布以及试样机械力学性能变化阐明活化机理.结果表明:材料抗压强度随机械粉磨时间的延长不断增大;结晶矿物相CaTiO3特征衍射峰强度不断减弱,粉磨1、2、3、4 h,结晶度下降幅度分别达22.7％、25.6％、32.8％、35.7％,说明非晶化/无定型程度增强.在粉磨3 h的高炉钛渣粉末样品中添加化学剂后,CaTiO3结晶度进一步降低9.21％,且对高炉钛渣存在侵蚀活化,协同机械粉磨强化高炉钛渣水化反应效果,助力高炉钛渣的高效资源化利用.
Enhancing hydration activity of titanium-bearing blast furnace slag based cementitious materials using combined mechanical grinding and chemical agents
Titanium-bearing blast furnace slag,produced from the smelting process of vanadium-titanium magnetite concentrate,was used as raw material.The hydration activity of the slag was activated through the combined application of mechanical grinding and chemical activators.The activation mechanism was elucidated by analyzing the mineral composition,crystal structure,and particle size distribution of the slag particles using XRD,FTIR,SEM,and a laser particle size analyzer,along with examining changes in the mechanical properties of the samples.The results show that the compressive strength of the samples increases with the extension of mechanical grinding time.The intensity of the characteristic diffraction peak of the crystalline mineral phase CaTiO3 decreases continuously.The crystallinity decreases by 22.7％,25.6％,32.8％and 35.7％after grinding for 1,2,3 and 4 hours,respectively,indicating an increased degree of amorphization.When chemical agents are added to titanium-bearing blast furnace slag powder ground for 3 h,the crystallinity of CaTiO3 is further reduced by 9.21％.Additionally,the chemical agents exhibit an erosive activation effect on the titanium-bearing blast furnace slag,synergistically enhancing the hydration reaction effect through mechanical grinding and promoting the efficient resource utilization of titanium-bearing blast furnace slag.

titanium-bearing blast furnace slagmechanical grindingchemical agentscompressive strengthcrystallinityhydration activity

尚波、祖运、罗中秋、皇甫林、周新涛、蔡秀楠

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昆明理工大学化学工程学院,云南 昆明 650500

钒钛资源综合利用国家重点实验室,四川攀枝花 617000

高炉钛渣 机械粉磨 化学剂 抗压强度 结晶度 水化活性

钒钛资源综合利用国家重点实验室开放课题云南省科技厅昆明理工大学"双一流"联合专项云南省"兴滇英才支持计划"青年人才专项昆明理工大学分析测试基金

2022P4FZG03A202101BE070001-031YNWR-QNBJ-2020-0632022T20160009

2024

10.3969/j.issn.1005-9954.2024.10.006

化学工程
华陆工程科技有限责任公司

化学工程

CSTPCD北大核心
影响因子：0.438
ISSN：1005-9954
年,卷(期)：2024.52(10)