摘要
为了更好地探究钒钛磁铁精矿碱性球团低温还原熔分工艺,用钒钛磁铁精矿和焦粉为主要原料制备钒钛磁铁矿碱性球团,考察了加水量、成球压力、黏结剂加入量和NaOH含量对球团落下强度的影响及焙烧温度对球团抗热裂性的影响。结果表明:钒钛磁铁矿碱性球团的落下次数随成球压力、聚乙烯醇浓度和NaOH加入量的增加而增加,随加水量的增加呈先增加后减小的趋势变化;最佳成球工艺参数为水加入量为6%,黏结剂聚乙烯醇浓度为0.4%,成球压力为10MPa,NaOH加入量为4%;在最佳的碱性球团制备工艺参数下考察了生球和干球的抗热裂性,两者随温度升高都变差,但是同温度下干球的抗热裂性优于生球的热裂性能。
The main purpose is to better explore the technology of low temperature reduction and melting of basic pellets of vanadium titanium magnetite concentrate,the V-Ti magnetite ore basic pellet containing NaOH was prepared with V-Ti-bearing magnetite concentrate and coke powder.Effects of water content,balling pressure,binder content and NaOH addition on the drop strength of pellet and the effect of the temperature on the thermal cracking resistance of pellet were investigated.It was found that falling numbers of V-Ti magnetite ore basic pellets increased with the increase of balling pressure,PVA concentration and addition of NaOH,but an increase in water content made the drop number of pellets increase firstly,and then decrease.The optimal process parameters of the pellet containing NaOH were that the water addition,polyvinyl alcohol concentration,balling pressure,and NaOH addition were 6%,0.4%,10 MPa and 4%,respectively.The thermal cracking resistance of raw pellets and dry pellets was investigated under the optimum technological parameters of alkaline pellets preparation.The thermal cracking resistance of raw pellets and dry pellets decreased with the increase of temperature,but at the same temperature,the thermal cracking resistance of dry pellets was better than that of green pellets.
作者
程相魁
赵英涛
赵旭
王军
黄晓丽
蒲春雷
CHENG Xiang-kui;ZHAO Ying-tao;ZHAO Xu;WANG Jun;HUANG Xiao-li;PU Chun-lei(International Research Institute of Vanadium and Titanium,Panzhihua University,Panzhihua 617000,Sichuan,China;Technological Institute of Development and Studies,Panzhihua 617000,Sichuan,China;Intelligent Development Department,MCC Huatian Engineering and Technology Corporation,Nanjing 210019,Jiangsu,China)
出处
《钢铁》
CAS
CSCD
北大核心
2020年第6期33-37,共5页
Iron and Steel
基金
安徽省重点研究和开发计划资助项目(201904a05020008)
攀西试验区计划资助项目(2017CY-G-24)
钒钛资源综合利用国家重点实验室开放课题资助项目
攀枝花大学科技园“种子资金”资助项目
攀枝花学院创新实验资助项目(2018cxcy022)。
关键词
钒钛磁铁精矿
NAOH
球团
落下强度
抗热裂性
V-Ti magnetite concentrate
NaOH
pellet
drop strength
thermal cracking resistance
