Discussion of proper segregation of composition and size distribution based on measurement of properties of multi regional material in deep sintering bed
- 作者：PEI YuandongAN GangZHAO ZhixingZHANG WeidongMA ZejunWANG QuanleWANG Hongjiang
- 会议时间：2013-06-01
- 关键词：iron ore ; sinter ; sintering bed ; zone ; pallet ; thick bed ; size
- 作者单位：PEI Yuandong,ZHAO Zhixing,ZHANG Weidong,MA Zejun(Shougang Research Institute of Technology Beijing,Beijing 100043,China)AN Gang,WANG Quanle,WANG Hongjiang(Ironmaking Plant,Shougang Jingtang Corporation.,TangShan 063200,Hebei,China)
- 母体文献：第五届宝钢学术年会论文集
- 会议名称：第五届宝钢学术年会
- 会议地点：上海
- 主办单位：中国金属学会
- 语种：chi
摘要
With on-site hoisting pallet of sintering material to carry out multi regional research,the reason of decline in sinter quality in deep sintering bed and high ratio imported ore of Jingtang was discovered as followed : Constraint problems of sinter quality of deep sintering bed and high ratio imported ore were discovered as follows : ① Materials size.Low part material of l# machine is course,and segregation is too large,resulting in less flux in low part;horizontal material distribution is not uniform in 2#machine pallet from one side to the other.② Component.For 1# machine,flux segregation is mainly distributed in high part,and material in low part has coarse granularity and less flux.and C segregation are increased;For 2# machine,chemical composition and the content of C is not even the linearity segregation,in second layer segregation abnormalities,monotonely only in Si02 and A1203 content segregation.③ High temperature zone.Width and speed of flame front along the width of pallet showed some inhomogeneities.④ Phase.Calcium ferrite content is lower in low part.⑤ Except surface,along the bed height,sinter tumbler index and yield index is not necessarily more and higher,and instead size degradation degree is more and more large.Based on this,the proposal of optimizing process and ore blending were proposed as follows : ①for l# machine,taking a cut of large size particle ( from 20% t0 8% ),eventually making the lateral upper material distribution tends to be uniform,with mean particle size standard deviation reducing from 0.32 t0 0.16;grain size segregation changes from 0.33 mm/( 100 mm) t0 0.27 mm/( 100 mm);drum index increases 2.1%,after falling,power reduced 1.73 0-10,size degradation is reduced by an average of 4.41 %.② for 2# machine,adopting the optimum mixing machine (88 HZ t0 78 HZ) and nine roller speed (22 HZ t0 18 HZ),increasing the quantity of return mines ( 10% ),optimization of shuttle car spacing and stopping time transformation,the mixture ratio of < 3 mm increased 8.5 percentage points;on the horizontal direction,the material distribution tends to be uniform;and the grain size segregation changes from 0.23 mm/( 100 mm) t0 0.30 mm/( 100 mm).Suitable mixture segregation in Jingtang is 0.26 -0.30 mm/(100 mm).Finally,this research is helpful for improving lower sinter quality in the thick material layer,providing quantitative analysis on large sintering machine region material and sinter properties,and mastering relations between large sintering equipment of sintering mixture and the final quality of sintered ore matching.Sinter quality improved with sinter tumbler index increasing by 0.2% - 0.49%,5 - 10 mm decreasing 0.2 - 0.69 percentage points,and sinter yield increasing by 1.67 %.