适合磁铁矿球团的新型粘结剂研究

Research on a New Binder for Magnetite Pellet

目前球团粘结剂主要成分是膨润土,但膨润土的使用会降低球团品位,为此,人们一直致力于寻求优质膨润土或开发新型的粘结剂。通过分析新型球团粘结剂A的基本物化性质、小饼试样的工艺性能得到预热与焙烧的最佳条件,在最佳条件下进行焙烧验证试验。试验使用优质钠基膨润土做基准试验,与新型粘结剂A比较。结果表明:在相同条件下,配加1%的新型粘结剂A的球团矿连晶更好,强度更高,可以完全替代膨润土。且配加新型粘结剂A的球团矿在较低温度下预热和焙烧就能达到工艺生产要求,有助于节能。使用新型球团粘结剂A代替膨润土应用于球团生产,具有一定应用前景。

Currently the main pellet binder is bentonite,but bentonite will reduce the grade of pellets.So people have been committed to find new high-quality bentonite or binder.By analyzing basic physical and chemical properties of the new pellet binder A and technological properties of the sample,the best conditions for preheating and calcination were found out.Under optimal conditions,roasting verification experiments were done.Compared with the new binder A,high quality sodium bentonite was used as benchmark experiments.The results show that pellets with 1% of the new binder A have better connecting-crystal characteristics and higher strength under the same conditions,which can replace the bentonite completely.Pellets with the new binder A can achieve the production requirements at a lower temperature preheating and calcination process,which contributes to energy conservation.Bentonite was replaced to be used in pellet production by the new type of binder A,which has a good future.