钛铁矿精矿球团造粒工艺研究

S. V. Lanovetskiy, O. Fedotova, Vladimir Z. Poiylov, V. Shein, O. G. Melkomukova
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引用次数: 0

摘要

钛精矿富集工艺中使用高度分散的钛铁矿,在钛料制备阶段伴随着高粉尘,不可避免地造成技术损失,对工作人员的工作条件产生不利影响。与此相关,本研究的目的是研究马雷舍夫斯基矿钛铁矿精矿的球团制粒工艺。采用高分辨率电子扫描显微镜和激光衍射粒度分析仪对钛铁矿精矿的粒度和形貌进行了测定。在恒温转鼓造粒机中进行造粒过程,通过评估温度、造粒转速、工艺时间和粘合剂流量对该产品颗粒粒度分布和静强度的影响。在研究过程中,确定了糖蜜体积比:水= 5:1的水溶液中,糖蜜颗粒分数的最大产率为1.0 ~ 5.0 mm。作为未稀释的糖蜜粘合剂的使用导致形成质量的延展性大大增加,并对生产颗粒状产品的可能性产生负面影响。结果表明,随着粘结剂浓度的增加,1.0 ~ 5.0 mm颗粒级的平均屈服率和静强度均有所提高,这是由于钛铁矿精矿颗粒间溶液的均匀分布所致。同时,当粘结剂在起始原料成分中的用量超过9.5%时,观察到形成较大的块状,其尺寸大于5.0 mm。实验证明,随着球团时间的延长,钛铁矿精矿1.0 ~ 5.0 mm的球团产率增加,在300 s时达到最大值。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
STUDY OF GRANULATION PROCESS OF ILMENITE CONCENTRATE BY PELLETING METHOD
The use of highly dispersed ilmenite ore in the titanium concentrate enrichment technology is accompanied by high dustiness at the stage of titanium charge preparation, which inevitably leads to technological losses and adversely affects the working conditions of the staff. In connection with this, the aim of the present work was to study the process of granulating ilmenite concentrate from the Malyshevsky deposit by pelletization. The size and morphology of ilmenite concentrate particles were determined using a high-resolution electron scanning microscope and a laser diffraction particle size analyzer. The granulation process was carried out in a drum granulator thermostated by assessing the effect of temperature, rotation speed granulator, process duration and a binder flow rate on particle size distribution and static strength formed granules of the title product. During the investigations it was established that the maximum yield of granules fraction of 1.0 - 5.0 mm was obtained using an aqueous solution of molasses molasses volume ratio: water = 5:1. The use as undiluted molasses binder leads to a strong increase in ductility formed mass and negatively affects the possibility of producing a granular product. It was shown that with increasing concentration of binder in the composition of the starting mixture the average yield and static strength of granules fraction of 1.0 - 5.0 mm increases, due to the uniform distribution of the solution between the ilmenite concentrate particles. At the same time when the amount of binder in the composition of the starting raw materials over 9.5% the formation of relatively large lumps is observed, which size is more than 5.0 mm. It has been experimentally proved that with increasing duration pelletization yield pellets of ilmenite concentrate fraction of 1.0 - 5.0 mm increases, passing through a maximum at 300 s.
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