熔融高炉渣纤维化过程中析晶行为研究

钢铁钒钛, 2017, 38(1): 74-77. doi: 10.7513/j.issn.1004-7638.2017.01.013

熔融高炉渣纤维化过程中析晶行为研究

任倩倩 ^1, , 张玉柱 ^2, , 龙跃 ^3, , 陈绍生 ^4, , 邹宗树 ^5, , 张春霞 ^6,

1.东北大学冶金学院,辽宁沈阳110819;钢铁研究总院先进钢铁流程及材料国家重点实验室,北京100081

2.东北大学冶金学院,辽宁沈阳110819;华北理工大学冶金与能源学院,河北唐山063009

3.华北理工大学冶金与能源学院,河北唐山,063009

4.华北理工大学冶金与能源学院,河北唐山,063009

5.东北大学冶金学院,辽宁沈阳,110819

6.钢铁研究总院先进钢铁流程及材料国家重点实验室,北京,100081

基金项目: 河北省科技计划项目(14963808D) 国家自然科学基金面上项目(51474090)

关键词：高炉渣 , 开始析晶温度 , 矿物组成 , 黏度 , 纤维化

Study on Crystallization Behavior in Fibrosis Process of Molten Blast Furnace Slag

Keywords： blast furnace slag , onset temperature of crystallization , mineral composition , viscosity , fibrosis

以高炉渣为研究对象,采用Faetsage热力学软件模拟高炉渣冷却过程中矿物开始析出温度、矿物的析出种类及含量;采用熔体物性综合测定仪研究高炉渣降温过程中的黏度变化;采用X射线衍射仪(XRD)和场发射扫描电子显微镜(SEM)研究高炉渣不同温度下的矿物组成和显微结构.结果表明:高炉渣冷却过程中,1 350℃开始析出晶体,析出的主晶相为钙铝黄长石(Ca2Al2SiO7)和镁黄长石(Ca2MgSi2O7).此外,熔融高炉渣成纤适宜的温度区间为1 350～1 371℃.

The blast furnace slag was studied using Fact-sage thermodynamic software to simulate the precipitation temperature,species and contents of the minerals precipitated in the cooling process of molten blast furnace slag.The viscosity curves of blast furnace slag during cooling process were obtained by synthetic test instrument for physical characteristics of melt.Mineral compositions and microstructure of the blast furnace slag at different temperatures were analyzed by X-ray diffraction (XRD) and field emission scanning electron microscope (SEM).The results indicate that the blast furnace slag begins to separate out crystals at 1 350 ℃ and the main crystal phase is composed of gehlenite (Ca2Al2SiO7) and akermanite (Ca2MgSi2O7).In addition,the suitable temperature range for fibrosis of molten blast furnace slag is 1 350 ～ 1 371 ℃.

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