摘要
针对全钒钛球团矿抗压强度低(平均1600 N/个左右)、波动大(最低仅926 N/个,最高2287 N/个),进入高炉冶炼后极大的影响了高炉稳定顺行,特开展了提高全钒钛球团矿抗压强度技术研究与应用。结果表明:通过增设润磨设备后,造球混合料粒度小于0.074 mm粒级由66.64%提高至71.69%,矿物颗粒表面变粗糙,粘结性增加,活性增强;且将预热二段温度提高到900℃左右、降低链篦机机速、延长预热时间,将焙烧温度从1150℃提高至1200℃以上,降低回转窑转速,延长焙烧时间后,球团矿内部带直径降低至3 mm以下,抗压强度提高至1989 N/个,波动明显减小,为高炉稳定顺行提供了原料基础。
The low compressive strength(average 1600 N/P)and large strength fluctuation(926 N/P min,2287 N/P max)of V-Ti pellets greatly affect the stability and smooth operation of blast furnace after being smelted in blast furnace.The technical research and application of improving the compressive strength of full V-Ti pellets have been carried out.After utilizing wet grinding equipment,the proportion of pelletizing mixture less than 0.074 mm is increased from 66.64%to 71.69%.And the surface of mineral particles becomes rough.Besides,the cohesiveness and activity increases as result of installing wet grinding equipment.By increasing the temperature of second preheating stage to about 900℃and reducing the grate speed to prolong the preheating time,at the same time increasing the roasting temperature from 1150℃to more than 1200℃and reducing the rotary kiln speed to prolong the roasting time,the diameter of inner zone of pellet can be reduced to less than 3 mm,and the compressive strength is increased to 1989 N/P and its fluctuation become narrow.
作者
胡鹏
蒋胜
谭阳杰
周密
向绍红
Hu Peng;Jiang Sheng;Tan Yangjie;Zhou Mi;Xiang Shaohong(Pangang Group Research Institute Co.,Ltd.,Panzhihua 617000,Sichuan,China;Pangang Group Xichang Iron&Steel Co.,Ltd.,Panzhihua 617000,Sichuan,China;School of Metallurgy,Northeast University,Shenyang 110819,Liaoning,China;Panzhihua Gangcheng Group Co.,Ltd.,Panzhihua 617000,Sichuan,China)
出处
《钢铁钒钛》
CAS
北大核心
2022年第4期107-113,共7页
Iron Steel Vanadium Titanium
关键词
全钒钛球团矿
抗压强度
焙烧温度
微观结构
V-Ti pellet
compressive strength
roasting temperature
microstructure
作者简介
胡鹏(1988-),男,四川广元人,工程师,副研究员,研究方向:铁矿石造块及高炉炼铁,E-mail:hupeng526417@163.com。
