有机粘结剂替代膨润土制备氧化球团.pdfVIP

38 5 () Vol.38 No.5 2007 10 J. Cent. South Univ. (Science and Technology) Oct. 2007 ( 410083) D D 0.25%~0.30%() 100 N/D 0.10% D 0.50%3 /(0.5 m)600 2.6~2.9 kN/400 N/D 0.30%D 64.07%1.0%0.76% 0.10%D 0.50% 63.74%1.0%0.43% TF046.6 A 1672-7207(2007)05−0850−07 Application of organic binder as substitutes for bentonite in pellet preparation YANG Yong-bin, HUANG Gui-xiang, JIANG Tao, HUANG Zhu-cheng, LUO Yong, HUANG Ya-lei (School of Minerals Processing and Bioengineering, Central South University, Changsha 410083, China) Abstract: The application of an organic binder D as a substitute for bentonite in pellet preparation was studied with the purpose of increasing total Fe (TFe) content of pellet. The results show that, when bentonite is fully substituted by organic binder D, satisfying green ball properties and fired pellet strength can be obtained by adding 0.25%−0.30% of binder D. However, the strength of preheated pellets is too poor to endure preparing processes that will exert strong mechanical forces on preheated pellets. Fortunately, when bentonite is partially substituted by organic binder D, green ball properties and fired pellet strength as well as preheated pellet strength turn out to be favorable. With 0.10% of binder D and 0.50% of bentonite added in the mix, such favorable results as wet knock over 3 per 0.5 m, burst temperature over 600 , fired pellet strength of 2.6−2.9 kN, and preheated pellet strength over 400 N are obtained. The TFe of pellet is significantly increased by using organic binder D either fully or