基于转底炉工艺的造球参数优化研究
Optimization study on pelletizing parameters based on rotary hearth furnace process
李卫国 1李强 2林培芳 1佘雪峰 2吴佩佩 3石建红 1王静松2
作者信息
- 1. 广东华欣环保科技有限公司,韶关 512123
- 2. 北京科技大学绿色低碳钢铁冶金全国重点实验室,北京 100083
- 3. 宝武集团环境资源科技有限公司,上海 201900
- 折叠
摘要
转底炉直接还原工艺是目前处理冶金粉尘的典型工艺,能充分回收利用粉尘中的铁、碳和锌等有用组分.本研究首先对粉尘的化学成分和粒径进行了分析与检测,再基于圆盘造球的方法,研究了水分对生球爆裂温度的影响,优化了转底炉的造球参数.结果表明,生球干燥后的水分应控制在4.0%以下,造球时间、黏结剂含量和碳氧质量比对成球率和球团的性能影响显著,当造球时间为12 min、膨润土含量为3.0%、碳氧质量比为0.7时,球团的性能最好,球团合格率为60.32%.
Abstract
The direct reduction process in rotary hearth furnaces is a common method for treating metallurgical dust.This process can fully recycle useful components such as Fe,C and Zn from the dust.The paper analyzes the chemical composition and particle size of the dust and investigates the impact of moisture on the burst temperature of green pellets produced through disc pelletizing.The study analyzed the impact of pelletizing time,binder content,and mass ratio of carbon to oxygen(C/O)on pelletizing rate,and pellet performance,and optimizes the pelletizing parameters of the rotary bottom furnace.The results show that the moisture content of green pellets after drying should not exceed 4.0%.Pelletizing time,binder content,and C/O have a significant impact to the pelletizing rate and pellet quality.Optimal pellet quality,with a qualified rate of 60.32%,is achieved when the pelletizing time is 12 min,the bentonite content is 3.0%,and the C/O is 0.7.
关键词
转底炉/爆裂温度/造球时间/黏结剂含量/碳氧质量比Key words
rotary hearth furnace/bursting temperature/pelletizing time/binder content/mass ratio of carbon to oxygen引用本文复制引用
基金项目
广东省省级科技计划(GDKJ2020002)
出版年
2024
NETL
NSTL
万方数据