摘要
含钛量高的优质氧化球团矿可作为高炉护炉原料。采用冷压成型低温固结工艺,对TiO2质量分数约为36%的3种钛精矿进行球团制备,并将球团炉外冷却试验与焖炉试验结果进行对比分析。结果表明:在1#矿∶2#矿∶3#矿的配比为34.4∶27.5∶38.1时,添加剂、黏结剂和水分的质量分数分别为3.0%、5.0%和7.4%,在热处理总时间为93 min的焖炉冷却条件下可获得优质的高炉护炉球团矿,其TFe和TiO2质量分数分别为25.82%和34.10%,还原粉化指数(-3.15 mm)为4.13%,常温抗压强度为2 776 N/P,热抗压强度为1 882 N/P。该制备工艺降低了黏结剂消耗量,缩短了球团干燥、热处理时间,提高了成品球的机械强度。
High-quality oxide pellets with high titanium content could be adopted as raw materials for blast furnace lining protection.Pellets are prepared and researched from 3 titanium concentrates with roughly 36% mass fraction of titanium dioxide,and tests results are compared between pellets cooling outside the furnace and cooling inside the furnace by technique of cold-bonded pelletizing and low temperature consolidation.High-quality pellets for blast furnace lining protection could be obtained under the inside cooling condition of the concentrates proportion of 1#∶2#∶3# is 34.4∶27.5∶38.1,the mass fractions of additives,binders and moisture are 3.0%,5.0% and 7.4%respectively,and the total heat treatment time is 93 min.The mass fractions of TFe and TiO2 are 25.82% and 34.10%.The low-temperature reduction powdering rate(-3.15 mm) of pellets for blast furnace lining protection is 4.13%,the compressive strength at room temperature is 2 776 N/P,and the thermal compressive strength is 1 882 N/P.The consumption of the binder is reduced,the time of pellet drying and heat treatment is shortened,and the mechanical strength of the finished pellets is improved by the preparation technique.
作者
代梦博
孙彩虹
孟庆民
春铁军
赵强
Dai Mengbo;Sun Caihong;Meng Qingmin;Chun Tiejun;Zhao Qiang(School of Metallurgiecal Engineering,Anhui University of Technology,Ma'anshan 243002,Anhui;Zhongye Changtian Iuernational Enginering Co.,Ld.,Changsha 410025,Hunan)
出处
《烧结球团》
北大核心
2020年第4期41-46,共6页
Sintering and Pelletizing
基金
国家科技部科技支撑计划基金资助项目(2012BAB07B04)。
关键词
钛精矿
高炉护炉料
炉外冷却
焖炉冷却
冶金性能
titanium concentrates
materials for blast furnace lining protection
cooling outside the furnace
cooling inside the furnace
metallurgical performances
