摘要
采用膨润土添加有机分散剂在搅拌机的作用下制备纤维化膨润土浆并对强化铁精矿造球进行研究。研究结果表明:添加有机分散剂制备的纤维化膨润土浆形成了良好的纤维化结构;造球混合料预配质量分数为1%的膨润土,利用纤维化膨润土浆进行强化造球,当球团强化层纤维化膨润土用量从0提高到0.18%时,落下强度和抗压强度分别从4.1次/(0.5 m)和14.63 N/个分别提高到5.8次/(0.5 m)和16.20 N/个,生球爆裂温度从530℃提高到610℃;预热球和焙烧球抗压强度从528 N/个和1 587 N/个分别提高到638 N/个和4 160 N/个,焙烧球内部结构由较疏松多孔变为结构致密,晶粒连接显著增强。
Fibrosis bentonite slurry was prepared by mixing organic dispersant and bentonite during the action of a blender, and the effect of fibrosis bentonite formation on iron ore pelletization and its mechanism were both studied. The results show that this fibrosis bentonite slurry was observed to form a fibrous structure. Bentonite dosage is 1.0% of mass concentration of iron ore, strengthening the pelletizing by spraying fibrosis bentonite in ball growing area. Drop strength, compression strength and burst temperature of green ball increase from 4.1 per 0.5 m, 14.63 N/pellet, at 530 ℃ to 5.8 per 0.5 m, 16.20 N/P at 610℃, respectively; the strength of preheated pellet and roasted pelltes respectively increase from 528 N/pellet and 1 587 N/pellet to 638 N/pellet and 4 160 N/pellet respectively while bentonite fiber dosage in the strengthened layer of pelletizing increases from 0% to 0.18%. The structure of roasted pellets changes from being loose and porous to being compact, and the contact of particles is improved.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第7期2145-2150,共6页
Journal of Central South University:Science and Technology
基金
国家自然科学基金资助项目(51234008)
