P含量对CaO-Al_2O_3-SiO_2体系在高温烧结过程中矿相转变的影响（英文）
|
摘要
采用XRF、XRD、SEM-EDS和DSC-TG等技术手段研究不同P含量下铝酸钙熟料在高温烧结过程中的矿相转变、显微组织、自粉性能及其氧化铝浸出性能。1350°C下烧结熟料主要由12CaO·7Al_2O_3、Ca O·Al_2O_3、β-2CaO·SiO_2和γ-2CaO·SiO_2等矿相组成;随着P含量的增加,β-2CaO·SiO_2含量逐渐升高,而γ-2CaO·SiO_2含量逐渐降低。熟料的自粉性能随着P含量的增加逐渐恶化。P在熟料中均匀分布,其存在抑制β-2CaO·SiO_2向γ-2CaO·SiO_2的转变。12Ca O·7Al_2O_3和CaO·Al_2O_3的晶胞体积随着P含量的增加分别降低和提高,且P能降低铝酸钙化合物的形成温度。铝酸钙熟料的氧化铝浸出率随着P含量的增加明显降低,当P含量从0提高到0.85%时,氧化铝浸出率从95.01%降低到83.84%。
The mineral transition, microstructure and self-pulverization as well as the Al_2O_3 leaching performance of calcium aluminate clinkers with different P additions in CaO-Al_2O_3-SiO_2 system during high-temperature sintering were systematically studied by XRF, XRD, SEM-EDS and DSC-TG technologies. The clinkers sintered at 1350 °C mainly contain 12 CaO·7 Al_2O_3, CaO ·Al_2O_3, β-2 CaO·SiO_2 and γ-2 CaO·SiO_2. The content of β-2 CaO ·SiO_2 increases while the content of γ-2 CaO ·SiO_2 decreases as the P addition increases. The self-pulverization property of clinkers deteriorates with increasing P addition. P distributes evenly in the clinkers, and inhibits the transformation of β-2 CaO·SiO_2 to γ-2 CaO·SiO_2. The cell volumes of 12 Ca O·7 Al_2O_3 and CaO·Al_2O_3 decrease and increase respectively as the P addition increases, and P decreases their formation temperatures. The Al_2O_3 leaching rate of calcium aluminate clinkers decreases obviously with increasing P addition, which decreases form 95.01% to 83.84% as the P addition increases from 0 to 0.85%.
The mineral transition, microstructure and self-pulverization as well as the Al_2O_3 leaching performance of calcium aluminate clinkers with different P additions in CaO-Al_2O_3-SiO_2 system during high-temperature sintering were systematically studied by XRF, XRD, SEM-EDS and DSC-TG technologies. The clinkers sintered at 1350 °C mainly contain 12 CaO·7 Al_2O_3, CaO ·Al_2O_3, β-2 CaO·SiO_2 and γ-2 CaO·SiO_2. The content of β-2 CaO ·SiO_2 increases while the content of γ-2 CaO ·SiO_2 decreases as the P addition increases. The self-pulverization property of clinkers deteriorates with increasing P addition. P distributes evenly in the clinkers, and inhibits the transformation of β-2 CaO·SiO_2 to γ-2 CaO·SiO_2. The cell volumes of 12 Ca O·7 Al_2O_3 and CaO·Al_2O_3 decrease and increase respectively as the P addition increases, and P decreases their formation temperatures. The Al_2O_3 leaching rate of calcium aluminate clinkers decreases obviously with increasing P addition, which decreases form 95.01% to 83.84% as the P addition increases from 0 to 0.85%.
引文
[1]AKONO A,CUI Y,KATARUKA A,ANDERSON K,KABIR P.Intrinsic mechanical properties of calcium aluminate crystals via the linear comparison composite method coupled with nano-indentation[J].Mechanics of Materials,2018,118:74-84.
[2]LEE N K,KOH K T,PARK S H,RYU G S.Microstructural investigation of calcium aluminate cement-based ultra-high performance concrete(UHPC)exposed to high temperatures[J].Cement and Concrete Research,2017,102:109-118.
[3]YANG Shou-lei,XIAO Guo-qing,DING Dong-hai,REN Yun,LVLi-hua,YANG Pan.Dissolution-precipitation mechanism of combustion synthesis of calcium aluminate[J].Ceramics International,2017,43(17):15918-15926.
[4]KANG Shuai,WANG Xue,XU Wen-bin,WANG Xin,HEDong-bing,HU Li-li.Effect of B2O3 content on structure and spectroscopic properties of neodymium-doped calcium aluminate glasses[J].Optical Materials,2017,66:287-292.
[5]FABRICHNAYA O B,NERáD I.Thermodynamic properties of liquid phase in the CaO·SiO2-Ca O·Al2O3·2SiO2-2CaO·Al2O3·SiO2system[J].Journal of the European Ceramic Society,2000,20(4):505-515.
[6]RODRíGUEZ M A,AGUILAR C L,AGHAYAN M A.Solution combustion synthesis and sintering behavior of Ca Al2O4[J].Ceramics International,2012,38(1):395-399.
[7]CHEN Guo-hua.Mechanical activation of calcium aluminate formation from CaCO3-Al2O3 mixtures[J].Journal of Alloys and Compounds,2006,416(1-2):279-283.
[8]MOHAMED B M,SHARP J H.Kinetics and mechanism of formation of monocalcium aluminate,CaAl2O4[J].Journal of Materials Chemistry,1997,7(8):1595-1599.
[9]MOHAMED B M,SHARP J H.Kinetics and mechanism of formation of tricalcium aluminate,Ca3Al2O6[J].Thermochimica Acta,2002,388(1-2):105-114.
[10]OSTROWSKI C,ELAZNY J.Solid solutions of calcium aluminates C3A,C12A7 and CA with sodium oxide[J].Journal of Thermal Analysis and Calorimetry,2004,75(3):867-885.
[11]ST?BER R,NOFZ M,GEBNER W,SCHR?TER C,KRANZ G.Paramagnetic monitors(Mn2+,Mn4+,Fe3+,and O2-)in the solid-state reaction yielding 12CaO·7Al2O3 and other aluminates[J].Journal of Solid State Chemistry,1989,81(2):152-164.
[12]VERMA R K,KAUR G,RAI A,RAI S B.Dual mode green fluorescence from Tb3+:Ca12Al14O33 and its applicability as delayed fluorescence[J].Materials Research Bulletin,2012,47(11):3726-3731.
[13]CHOU K S,BURNET G.Formation of calcium aluminates in the lime-sinter process[J].Cement and Concrete Research,1981,11(2):167-174.
[14]TIAN Yong-pan,PAN Xiao-lin,YU Hai-yan,TU Gan-feng.Formation mechanism of calcium aluminate compounds based on high-temperature solid-state reaction[J].Journal of Alloys and Compounds,2016,670:96-104.
[15]ZHANG Di,PAN Xiao-lin,YU Hai-yan,ZHAI Yu-chun.Mineral transition of calcium aluminate clinker during high-temperature sintering with low lime dosage[J].Journal of Materials Science and Technology,2015,31(12):1244-1250.
[16]YU Hai-yan,PAN Xiao-lin,WANG Bo,ZHANG Wu,SUN Hui-lan,BI Shi-wen.Effect of Na2O on the formation of calcium aluminates in the Ca O-Al2O3-SiO2 system[J].Transactions of Nonferrous Metals Society of China,2012,22(12):3108-3112.
[17]YU Hai-yan,PAN Xiao-lin,LIU Bao-wei,WANG Bo,BI Shi-wen.Effect of iron oxides on the activity of calcium aluminate clinker in Ca O-Al2O3-SiO2 system[J].Journal of Iron and Steel Research,International,2014,21(11):990-994.
[18]WANG Bo,SUN Hui-lan,GUO Dong,ZHANG Xue-zheng.Effect of Na2O on alumina leaching property and phase transformation of MgO-containing calcium aluminate slags[J].Transactions of Nonferrous Metals Society of China,2011,21(12):2752-2757.
[19]WANG Bo,CHU Wei-qin,HAO Yuan-liang,RONG Shuo,SUNHui-lan.Synthesis and alumina leaching mechanism of calcium sulphoaluminate[J].Transactions of Nonferrous Metals Society of China,2017,27(9):2090-2095.
[20]PAN Xiao-lin,YU Hai-yan,TU Gan-feng.Reduction of alkalinity in bauxite residue during Bayer digestion in high-ferrite diasporic bauxite[J].Hydrometallurgy,2015,151:98-106.
[21]GHOSH S N,RAO P B,PAUL A K,RAINA K.The chemistry of dicalcium silicate mineral[J].Journal of Materials Science,1979,14(7):1554-1566.
[22]áNGELES G,KHADIJA M,MOHAMMED Z,ARANDA A G.In situ synchrotron powder diffraction study of active belite clinkers[J].Journal of Applied Crystallography,2007,40(6):999-1007.
[23]YU Hai-yan,WANG Bo,PAN Xiao-lin,Ding Ting-ting,BI Shi-wen.Electrochemical study on adsorption behavior of surfactants atβ-2CaO·SiO2/NaAlO2 interface[J].Transactions of Nonferrous Metals Society of China,2013,23(8):2416-2421.
[24]SUN Hui-lan,WANG Bo,ZHANG Jian-xin,ZONG Shu-feng,LIUJia-jia.Secondary reaction mechanism of leaching process of calcium aluminate slag[J].Transactions of Nonferrous Metals Society of China,2015,25(4):1334-1340.
[2]LEE N K,KOH K T,PARK S H,RYU G S.Microstructural investigation of calcium aluminate cement-based ultra-high performance concrete(UHPC)exposed to high temperatures[J].Cement and Concrete Research,2017,102:109-118.
[3]YANG Shou-lei,XIAO Guo-qing,DING Dong-hai,REN Yun,LVLi-hua,YANG Pan.Dissolution-precipitation mechanism of combustion synthesis of calcium aluminate[J].Ceramics International,2017,43(17):15918-15926.
[4]KANG Shuai,WANG Xue,XU Wen-bin,WANG Xin,HEDong-bing,HU Li-li.Effect of B2O3 content on structure and spectroscopic properties of neodymium-doped calcium aluminate glasses[J].Optical Materials,2017,66:287-292.
[5]FABRICHNAYA O B,NERáD I.Thermodynamic properties of liquid phase in the CaO·SiO2-Ca O·Al2O3·2SiO2-2CaO·Al2O3·SiO2system[J].Journal of the European Ceramic Society,2000,20(4):505-515.
[6]RODRíGUEZ M A,AGUILAR C L,AGHAYAN M A.Solution combustion synthesis and sintering behavior of Ca Al2O4[J].Ceramics International,2012,38(1):395-399.
[7]CHEN Guo-hua.Mechanical activation of calcium aluminate formation from CaCO3-Al2O3 mixtures[J].Journal of Alloys and Compounds,2006,416(1-2):279-283.
[8]MOHAMED B M,SHARP J H.Kinetics and mechanism of formation of monocalcium aluminate,CaAl2O4[J].Journal of Materials Chemistry,1997,7(8):1595-1599.
[9]MOHAMED B M,SHARP J H.Kinetics and mechanism of formation of tricalcium aluminate,Ca3Al2O6[J].Thermochimica Acta,2002,388(1-2):105-114.
[10]OSTROWSKI C,ELAZNY J.Solid solutions of calcium aluminates C3A,C12A7 and CA with sodium oxide[J].Journal of Thermal Analysis and Calorimetry,2004,75(3):867-885.
[11]ST?BER R,NOFZ M,GEBNER W,SCHR?TER C,KRANZ G.Paramagnetic monitors(Mn2+,Mn4+,Fe3+,and O2-)in the solid-state reaction yielding 12CaO·7Al2O3 and other aluminates[J].Journal of Solid State Chemistry,1989,81(2):152-164.
[12]VERMA R K,KAUR G,RAI A,RAI S B.Dual mode green fluorescence from Tb3+:Ca12Al14O33 and its applicability as delayed fluorescence[J].Materials Research Bulletin,2012,47(11):3726-3731.
[13]CHOU K S,BURNET G.Formation of calcium aluminates in the lime-sinter process[J].Cement and Concrete Research,1981,11(2):167-174.
[14]TIAN Yong-pan,PAN Xiao-lin,YU Hai-yan,TU Gan-feng.Formation mechanism of calcium aluminate compounds based on high-temperature solid-state reaction[J].Journal of Alloys and Compounds,2016,670:96-104.
[15]ZHANG Di,PAN Xiao-lin,YU Hai-yan,ZHAI Yu-chun.Mineral transition of calcium aluminate clinker during high-temperature sintering with low lime dosage[J].Journal of Materials Science and Technology,2015,31(12):1244-1250.
[16]YU Hai-yan,PAN Xiao-lin,WANG Bo,ZHANG Wu,SUN Hui-lan,BI Shi-wen.Effect of Na2O on the formation of calcium aluminates in the Ca O-Al2O3-SiO2 system[J].Transactions of Nonferrous Metals Society of China,2012,22(12):3108-3112.
[17]YU Hai-yan,PAN Xiao-lin,LIU Bao-wei,WANG Bo,BI Shi-wen.Effect of iron oxides on the activity of calcium aluminate clinker in Ca O-Al2O3-SiO2 system[J].Journal of Iron and Steel Research,International,2014,21(11):990-994.
[18]WANG Bo,SUN Hui-lan,GUO Dong,ZHANG Xue-zheng.Effect of Na2O on alumina leaching property and phase transformation of MgO-containing calcium aluminate slags[J].Transactions of Nonferrous Metals Society of China,2011,21(12):2752-2757.
[19]WANG Bo,CHU Wei-qin,HAO Yuan-liang,RONG Shuo,SUNHui-lan.Synthesis and alumina leaching mechanism of calcium sulphoaluminate[J].Transactions of Nonferrous Metals Society of China,2017,27(9):2090-2095.
[20]PAN Xiao-lin,YU Hai-yan,TU Gan-feng.Reduction of alkalinity in bauxite residue during Bayer digestion in high-ferrite diasporic bauxite[J].Hydrometallurgy,2015,151:98-106.
[21]GHOSH S N,RAO P B,PAUL A K,RAINA K.The chemistry of dicalcium silicate mineral[J].Journal of Materials Science,1979,14(7):1554-1566.
[22]áNGELES G,KHADIJA M,MOHAMMED Z,ARANDA A G.In situ synchrotron powder diffraction study of active belite clinkers[J].Journal of Applied Crystallography,2007,40(6):999-1007.
[23]YU Hai-yan,WANG Bo,PAN Xiao-lin,Ding Ting-ting,BI Shi-wen.Electrochemical study on adsorption behavior of surfactants atβ-2CaO·SiO2/NaAlO2 interface[J].Transactions of Nonferrous Metals Society of China,2013,23(8):2416-2421.
[24]SUN Hui-lan,WANG Bo,ZHANG Jian-xin,ZONG Shu-feng,LIUJia-jia.Secondary reaction mechanism of leaching process of calcium aluminate slag[J].Transactions of Nonferrous Metals Society of China,2015,25(4):1334-1340.