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Vol.28 No.8 张俊燕等：高炉喷吹贫瘦煤最低着火温度 .789. Minimum ignition temperature of meager lean coal for BF injection ZHA NG Junyan,SONG Cunyi,WANG Liying,JIN Yanhui Civil and Environmental Engineering School.University of Science and Technology Beijing.Beijing 100083.China ABSTRACI In view of safety the elementary and industrial analyses of coal samples were conducted,a systematic experiment was performed to investigate the minimum ignition temperature(MIT)of Zhangcun and Changcun meager-lean coal in a G-G furnace,and the effect of dust concentration,spray-air pressure and dust particle size on the MIT was analyzed.The results show that the TIM increases with the decrease of dust concentration and the increase of spray-air pressure and dust particle size.A linear regression was conducted and the functional relationship was found,which can afford reference for the security of meager- lean coal's industry application. KEY WORDS blast furnace injection;meager-lean coal;minimum ignition temperature (TIM);explo- sion properties;mathematical model Crystallization kinetics of (Nio.75Fe0.25)78-xNb:Si10B12(x=0,5)amorphous al- loys CHEN Xueding,WEI Hengdou,WANG Xiaojun State Key Laboratory of Advanced New Non ferrous Materials,Lanzhou University of Technology.Lanzhou 730050.China ABSTRACT Amorphous ribbons of (Nio.75Fe0.25)7-x Nb,Si10B12(x=0,5)were prepared by a single roller melt-spinning technique in air atmosphere.The crystallization kinetics of the alloys were investigated by means of continuous heating,and the activation energies of the alloys were calculated using Kissinger plot method and Ozawa plot method on the basis of differential thermal analysis data.The crystallization products were analyzed by X-ray diffraction.After the (Nio.75Fe0.25)78Si10Bi2 amorphous alloy was an- nealed at the temperatures 715 and 745K,a single phase of (Fe,Ni)solid solution with grain sizes of about 10.3 and 18.5nm,respectively,precipitates in the amorphous matrix.The crystallized phases are Y (Fe,Ni)solid solution,FezSi,NiSi,and FesB after annealing at 765 K.The (Nio.7sFe0.25)73NbsSi B12 amorphous alloy was annealed at 720,750,and 800K:and the crystallization phases,(Fe,Ni)sol- id solution,(Fe,Ni)23B6,Ni31Si12 and Nb2NiBo.16 form simultaneously. KEY WORDS amorphous materials;thermal analysis;crystallization kinetics;activation energy [摘自Rare Metals,.2006,25(4):342]Minimum ignition temperature of meager-lean coal for BF injection ZHA NG JunyanSONG CunyiWA NG L iyingJIN Y anhui Civil and Environmental Engineering SchoolUniversity of Science and Technology BeijingBeijing100083China ABSTRACT In view of safety the elementary and industrial analyses of coal samples were conducteda systematic experiment was performed to investigate the minimum ignition temperature （MIT） of Zhangcun and Changcun meager-lean coal in a G-G furnaceand the effect of dust concentrationspray-air pressure and dust particle size on the MIT was analyzed．The results show that the TIM increases with the decrease of dust concentration and the increase of spray-air pressure and dust particle size．A linear regression was conducted and the functional relationship was foundwhich can afford reference for the security of meagerlean coal’s industry application． KEY WORDS blast furnace injection；meager-lean coal；minimum ignition temperature （TIM）；explosion properties；mathematical model Crystallization kinetics of （Ni0∙75Fe0∙25）78－ xNb xSi10B12（ x＝05） amorphous a-l loys CHEN XuedingWEI HengdouWA NG Xiaojun State Key Laboratory of Advanced New Non-ferrous MaterialsLanzhou University of TechnologyLanzhou730050China ABSTRACT Amorphous ribbons of （Ni0∙75Fe0∙25）78－ x Nb xSi10B12（ x ＝05） were prepared by a single roller melt-spinning technique in air atmosphere．The crystallization kinetics of the alloys were investigated by means of continuous heatingand the activation energies of the alloys were calculated using Kissinger plot method and Ozawa plot method on the basis of differential thermal analysis data．The crystallization products were analyzed by X-ray diffraction．After the （Ni0∙75Fe0∙25）78Si10B12 amorphous alloy was annealed at the temperatures715and745Ka single phase of γ－（FeNi） solid solution with grain sizes of about 10∙3and18∙5nmrespectivelyprecipitates in the amorphous matrix．The crystallized phases are γ －（FeNi） solid solutionFe2SiNi2Siand Fe3B after annealing at 765K．The （Ni0∙75Fe0∙25）73Nb5Si10 B12 amorphous alloy was annealed at720750and800K；and the crystallization phasesγ－（FeNi） solid solution（FeNi）23B6Ni31Si12and Nb2NiB0∙16form simultaneously． KEY WORDS amorphous materials；thermal analysis；crystallization kinetics；activation energy ［摘自 Rare Metals200625（4）：342］ Vol．28No．8 张俊燕等： 高炉喷吹贫瘦煤最低着火温度 ·789·