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Improving properties of fluxed iron ore pellets with high-silica by regulating liquid phase
文献摘要:
With rapid development of the pellet production under the background of green development,high-quality iron concen-trates were gradually exhausted;thus,using high-silica iron concentrates was expected to be a promising way to relieve resource pressure for pellet production.However,increasing the proportion of high-silica acid pellets into the furnace led to worse blast furnace slag,and the metallurgical properties of high-silica pellets were imperfect.To understand the reciprocal effects of basicity(CaO/SiO2)and MgO content on the properties of the high-silica pellets,the phase compositions and microstructure were investigated using X-ray diffraction and scanning electron microscope,equipped with energy dis-persive X-ray spectrometry.The results indicated that simply increasing MgO content from 0 to 2.50 wt.% could decrease the reduction swelling index,but the compressive strength rapidly declined due to the formation of magnesioferrite.However,adding CaO to 2.50 wt.% MgO pellets greatly improved the pellet qualities,which could be attributed to a substantial increase in the amount of high-melting-point silicate liquid phase.
文献关键词:
作者姓名:
Yuan-bo Zhang;Xi-jun Chen;Zi-jian Su;Shuo Liu;Fang Chen;Nan-yong Wu;Tao Jiang
作者机构:
School of Minerals Processing and Bioengineering,Central South University,Changsha 410083,Hunan,China;Yangzhou Pacific Special Materials Co.,Ltd.,Yangzhou 225211,Jiangsu,China
引用格式:
[1]Yuan-bo Zhang;Xi-jun Chen;Zi-jian Su;Shuo Liu;Fang Chen;Nan-yong Wu;Tao Jiang-.Improving properties of fluxed iron ore pellets with high-silica by regulating liquid phase)[J].钢铁研究学报(英文版),2022(09):1381-1392
A类:
fluxed,trates,magnesioferrite
B类:
Improving,properties,iron,ore,pellets,high,by,regulating,liquid,phase,With,development,production,background,green,quality,were,gradually,exhausted,thus,using,concentrates,was,expected,be,promising,way,relieve,resource,pressure,However,increasing,proportion,acid,into,furnace,led,worse,blast,slag,metallurgical,imperfect,To,understand,reciprocal,effects,basicity,CaO,SiO2,MgO,content,compositions,microstructure,investigated,ray,diffraction,scanning,electron,microscope,equipped,energy,dis,persive,spectrometry,results,indicated,that,simply,from,wt,could,decrease,reduction,swelling,compressive,strength,rapidly,declined,due,formation,adding,greatly,improved,qualities,which,attributed,substantial,increase,amount,melting,point,silicate
AB值:
0.573236
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