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文章介绍了某铜矿Φ8.53×3.96m半自磨机实际混合充填率由18%增加到28%左右,处理量由200 t/h增加到340 t/h左右。按四维破磨理论分析,当实际混合充填率≤28%会产生钢球直接砸筒体衬板,造成处理量低,能耗极高。提出装钢球120 t不变,实际混合充填率由28%增加到处理能力最大能源利用率最高的最佳实际混合充填率50%左右,其处理量又由340 t/h增加到670 t/h左右。半自磨用电单耗由实际混合充填率20%左右的14.6kW h/t下降到7.0kW h/t左右,节电50%以上。
The paper introduces that the actual mixed filling rate of Φ8.53 × 3.96m semi-autogenous mill in a copper mine increased from 18% to 28%, and the treatment capacity increased from 200 t / h to 340 t / h. Analysis by four-dimensional crushing theory, when the actual mixing fill rate of ≤ 28% will produce a ball directly hit the cylinder liner, resulting in low throughput, high energy consumption. It is proposed that 120 t steel ball should be kept unchanged, the actual mixing filling rate will increase from 28% to the best practical mixing filling rate with the highest energy utilization rate of about 50%, and the processing volume will increase from 340 t / h to 670 t / h or so. Semi-self-abrasion power consumption by the actual mixed charge rate of about 20% 14.6kW h / t down to 7.0kW h / t or so, saving more than 50%.