Preparation and Consolidation Technology of Vanadium Slag Pellets
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摘要: 为解决钒渣钠化球团焙烧-热水浸出提钒工艺中球团原料性能较差的生产问题，进行了钒渣精粉造球与烘干技术研究。实验室与工业试验结果表明：采用粘结剂A制备的粘结溶液作为压球添加剂，控制钠化反应时间3~4 h，反应温度为85~95℃，钒渣精粉粒度-120目（124μm）占比≥80%，湿搅拌时间10~15 min，下料量1.5~2.0 t/h，湿球含水率为6%~8%，采用阶梯烘干制度（100~150℃为20 min，250~300℃为20 min），干球团含水率为0.50%以下，干球团强度为45~60 N/个，达到了球团钠化焙烧工艺要求。Abstract: In order to solve the production problem of poor performances of vanadium slag pellets during the process of sodium salt roasting and hot water leaching of vanadium slag pellets,the technology of pelletizing and drying for vanadium slag fine powder was studied.The laboratorial and industrial test results show that the pellets could meet the technical requirements of sodium salt roasting at the following conditions:solution containing binder A as the additive for pelletizing,85~95℃ of reaction temperature for 3~4 h,more than 80% of particles below 124 μm for vanadium slag fine powder,10~15 min of wet mix,1.5~2.0 t/h of feed rate,6%~8% of moisture for wet pellets,ladder drying system(100~150℃ for 20 min,250~300℃ for 20 min),less than 0.50% of moisture and 45~60 N/piece of compressive strength for dried pellets.
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Key words:
- vanadium slag /
- sodium salt roasting /
- pellets /
- consolidation /
- compressive strength
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