摘要
为探讨红土矿粉造球并直接入炉的可行性,通过对红土矿粉粒度、化学成分的分析,采用造球的方法使其成为具有一定形状的球团,实验研究不同粘接剂的成球性能,并模拟回转窑温度和还原性气氛对球团进行预还原实验和高温强度测试。结果表明:红土镍矿粉配入3%的新型粘接剂进行造球,成球率达到70%以上,球团干燥后落下强度达到30次以上。在还原性气氛、1 100℃预还原焙烧后球团都能保持颗粒的完整性,无破裂粘接现象,抗压强度为472 N个,完全可以作为冶炼原料进入电炉进行生产,达到了工业生产入炉要求。
This paper aims to discuss the pelleting study of laterite ore and the feasibility of directly putting it into the furnace.Through analyzing its particle size and chemical constituent,the paper considers it possible to pelletize the laterite ore into balls of certain diameter.The experimental researches include learning the performance of different adhesives used in pellets conducting,testing the pellets in high-temperature intensity and doing pre-reduction experiments on the pellets by imitating the temperature and pre-reduction environment in the rotary kiln.The results show that the rate of pelleting will go up to 70% when mixed the laterite ore with 3 % of new type of adhesive and the dropping strength of a perfectly dried pellet could be more than 30 times.Under reducing atmosphere and pre-reducing roasting at 1100 degrees centigrade,a pellet can maintain the integrity without adhesion or fracture and its compressive strength can reach as high as 472N per-pellet.The study fully demonstrates that the pellet could be used as smelting material and put into electric furnace,which meet the requirements of industrial production.
出处
《重庆科技学院学报（自然科学版）》
CAS
2013年第5期95-98,共4页
Journal of Chongqing University of Science and Technology：Natural Sciences Edition
基金
重庆市教委科学研究项目(KJ111419)
关键词
红土矿粉
球团
预还原
抗压强度
laterite ore
pellet
pre-reduction
compressive strength
