钒钛磁铁矿冷压含碳球团的粘结剂选择  

Selection of Binder for Coldly Pressed Carbon-bearing Vanadium Titano-magnetite Pellets

作　　者：曹明明[1] 张建良[1] 薛逊[2] 邢相栋[1] 王春龙[1] 王喆[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083 [2]攀枝花钢铁研究院,四川攀枝花617000

出　　处：《矿冶工程》2012年第5期67-71,共5页Mining and Metallurgical Engineering

基　　金："十一五"国家科技支撑计划重大项目(2008BAB32B05)

摘　　要：为了提高钒钛磁铁矿冷压含碳球团的强度,选用膨润土、糖浆及玉米面作粘结剂,对比了3种粘结剂对球团性能的影响,从而确定适合转底炉工艺的较优粘结剂及最佳配加量。结果表明:膨润土加入量超过6%时,制备球团性能能够达到转底炉工艺要求,但导致球团内铁品位降低程度较大;添加糖浆作粘结剂时,在实验研究范围内,球团性能尚未达到工艺要求,且存在压球过程中脱模困难问题;而选用玉米面作粘结剂制备球团时各方面都能达到工艺要求。玉米面(含量2.5%)加入到浓度为4%的NaOH溶液中发酵15 min左右,所得球团的湿球落下强度为4.8次,湿球抗压强度为55.1 N,干球落下强度为24.8次,干球抗压强度为648.1N,湿球爆裂温度为400℃,满足转底炉生产的各项指标。In order to improve the strength of coldly pressed carbon-bearing vanadium titano-magnetite pellets, three binders such as bentonite, molasses and corn meal were chosen to investigate their effects on the pellet performance to determine the most suitable binder and dosage for a rotary hearth furnace. The results showed that when the dosage of bentonite was more than 6% the performance of the prepared pellets could meet the technological requirements of the rotary hearth furnace, but the Fe grade of the pellets decreased greatly. When molasses was used as binder, the pellet performance could not meet the technological requirements in the experimental study, and moreover, demoulding was difficult in the course of pellet pressing. When corn meal was used to make pellets, all the requirements could be meet. After corn meal（ content 2.5% ） was added into 4% NaOH solution and fermented for about 15 min, the wet-pellet drop strength of the prepared pellets was 4.8 times, the compressive strength 55.1 N, and the dry-pellet drop strength was 24.8 times, the compressive strength 648. 1 N. The burst temperature of wet pellets was 400 ℃, meeting the requirements of the rotary hearth furnace.

关 键 词：钒钛磁铁矿 含碳球团 粘结剂 压球 

分 类 号：TF55[冶金工程—钢铁冶金]