摘要
为了提高球团矿铁品位,研究新型有机粘结剂D替代膨润土对球团制备的影响。研究结果表明：采用有机粘结剂D完全替代膨润土,当其用量为0.25%～0.30%（质量分数）时,即可获得满足要求的生球性能及成品球强度,但预热球强度很低,只有100 N/个左右,只能用于对预热球强度要求不高的球团生产工艺;而有机粘结剂D部分替代膨润土时,不仅可以获得良好的生球性能及成品球强度,预热球强度也可满足生产要求;在0.10%有机粘结剂D和0.50%膨润土的条件下,生球落下强度大于3次/（0.5 m）,且爆裂温度大于600℃,成品球强度达到2.6～2.9 kN/个,预热球强度大于400 N/个;有机粘结剂D的应用使球团铁品位明显提高,用0.30%有机粘结剂D完全替代膨润土时,球团铁品位为64.07%,比1.0%膨润土的球团提高0.76%;采用0.10%有机粘结剂D和0.50%膨润土时,球团铁品位为63.74%,比1.0%膨润土球团提高0.43%。
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 partially as a substitute for bentonite. The TFe reaches 64.07% with 0.30% binder D only, and 63.74% with 0.10% organic binder D and 0.50% bentonite. The two TFe contents are 0.76% and 0.43% higher than that with 0.10% bentonite, respectively.
出处
《中南大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第5期850-856,共7页
Journal of Central South University:Science and Technology
