摘要
对南京某铁矿进行了实验室磨矿过程参数优化试验和工业应用。一段磨矿试验包括磨矿时间、磨矿浓度、磨机转速、磨机生产能力、钢球直径等单一影响因素试验。二段磨矿试验包括不同磨矿时间、磨矿浓度、介质充填率下的钢锻介质、钢球介质和钢球混合介质对比磨矿试验。根据研究结果可知,该铁矿磨矿产率与磨矿时间几乎成线性关系,属匀质矿、易碎磨。对该矿而言,混合钢球比单一钢锻、单一钢球的磨矿效率都要高,但钢锻在长时间磨矿过程中产生的过粉碎和磨矿产品的均匀度,却比单一钢球和混合钢球要好。一段二段现场磨矿浓度控制在73%、磨机转速率76%、充填率35%左右是较为合适。工业试验后比试验前二段分级溢流中-0.074^+0.037 mm粒级产率高出27.01%,-0.01 mm粒级产率减少21.70%,二段溢流产品质量得到明显改善。
This paper described the analysis of spot grinding loop and the optimization of grinding parameters through laboratory experiments. The primarily stage grinding experiments contained milling time,grinding concentration,rotation rate,production capacity,the diameter of steel ball and so on. The secondary stage grinding experiments contrasted the effect of cylpebs,steel ball and mixed steel ball under different grinding time,grinding concentration and filling rate. According to the research result,it showed that the grinding rate of iron ore and grinding time was nearly a linear relationship. The grinding efficiency of mixed steel ball was the highest among cylpebs,steel ball and mixed steel ball and the grinding evenness and over-crushed of cylpebs was the best among cylpebs,steel ball and mixed steel ball after long time grinding process. The grinding parameters such as grinding concentration of 73%,rotation rate of 76%,filling rate of 35% were more appropriate in industrial. The fractions of-0. 074 ＋ 0. 037 mm increased 27. 01% and-0. 01 mm decreased by 21. 70% in secondary classification overflow and the quality of the secondary stage overflow was dramatically improved after the optimization.
出处
《湖南有色金属》
CAS
2017年第6期17-21,27,共6页
Hunan Nonferrous Metals
基金
江西省重点研发计划(20171BBG70045)
江西省教育厅课题(GJJ150651)
关键词
粒度组成
钢锻
界面性质
磨矿
particle size
cylpebs
the interface properties
grinding
