摘要
为阐释MgO含量对CaO-SiO_2-Fe_2O_3-MgO-Al_2O_3体系富镁复合铁酸钙(以下简称SFCAM)生成的影响机制,利用XRD、SEM、EDS等方法分析了950～1 250℃条件下获得的CaO-SiO_2-Fe_2O_3-MgO-Al_2O_3体系(MgO含量为1.3%～3.9%)的物相组成、微观形貌等。结果表明:SFCAM开始生成温度区间为1 000～1 050℃,大量生成温度区间为1 150～1 200℃;当温度高于1 200℃时,SFCAM开始分解。确定当温度大于1 100℃,低MgO含量时,MgO主要以MgFe_2O_4、Ca_2Mg(Si_2O_7)(以下简称CMS)形式与铁铝酸钙(以下简称CFA)等反应生成SFCAM;高MgO含量时,MgO主要以CMS形式与CFA等反应生成SFCAM。
In order to elucidate the mechanism of effect of MgO content on the formation of magnesium rich composite calcium ferrite(hereinafter referred as SFCAM) in CaO-SiO2-Fe2O3-MgO-Al2O3 system, the phase composition and micromorphology of the CaO-SiO2-Fe2O3-MgO-Al2O3 system(with MgO content of 1.3%~3.9%) at temperature of 950~1 250 ℃ are studied by the methods of XRD, SEM and EDS. The results show that, the initial formation temperature range of Mg-rich SFCA is 1 000~1 050 ℃, and the temperature range of large amount of Mg-rich SFCA formation is 1 150~1 200 ℃;and when the temperature is higher than 1 200 ℃, the SFCAM begins to decompose. It is determined that when the temperature is higher than 1 100 ℃ and the content of MgO is low, MgO reacts with calcium ferric aluminate(hereinafter referred as CFA) and forms Mg-rich SFCA mainly in the form of MgFe2O4 and Ca2Mg(Si2O7)(hereinafter referred as CMS). When the content of MgO is high, MgO reacts with CFA and forms SFCA mainly in the form of CMS.
作者
马保良
张玉柱
杨锦涛
胡长庆
Ma Baoliang;Zhang Yuzhu;Yang Jintao;Hu Changqing(School of Metallurgy,Northeastern University,Shenyang 110819,Liaoning;Xingtai Iron and Steel Co.,Ltd.,Xingtai 054027,Hebei;School of Metallurgy and Energy,North China University of Science and Technology,Tangshan 063009,Hebei)
出处
《烧结球团》
北大核心
2019年第1期1-5,共5页
Sintering and Pelletizing
基金
河北省科技计划项目(17217691D)
