云南某铜矿SABC碎磨能耗分布规律及能量基准评价研究

Study on Distribution Law of SABC Grinding Energy Consumption and Energy Benchmark Evaluation of a Copper Mine in Yunnan

提高碎磨能量利用效率是降低碳排放的重要途径,而碎磨能耗分布规律与能量基准评价是提高能量利用效率的前提和基础。某大型铜矿SABC碎磨流程能耗分布规律研究结果表明,碎磨全流程比能耗为19.59 kWh/t,半自磨机、球磨机、顽石破碎机的比能耗分别占全流程比能耗的36.76%、55.75%及0.83%;球磨机运行功率接近安装功率的93.40%,限制了碎磨系统产能的进一步提升。以原矿代表性样品单颗粒冲击破碎试验为基础,建立了矿石粉碎模型,通过能量基准评价方法计算出SABC碎磨全流程理论最低粉碎能耗为8.96 kWh/t,分别对SABC碎磨全流程、半自磨+振动筛+顽石破碎作业、球磨与分级作业进行了能量基准评价,得出能量效率因子(BEF值)分别为2.19、1.71和2.60,进一步明确了提升球磨分级作业能量利用效率的必要性。能量基准评价研究为碎磨能量利用效率提供了统一、定量的评价指标,为碎磨全流程产能提升与节能降耗指明了优化方向。

Increasing the energy utilization efficiency of the comminution circuit was an important way to reduce carbon emissions,and the research on the energy consumption distribution and the energy benchmark evaluation of the comminution circuit were the prerequisite and basis for improving the energy utilization efficiency.Results of the energy consumption distribution of the SABC circuit in a large-scale copper mine showed that the specific energy consumption of the whole comminution circuit was 19.59 kWh/t,and the.specific energy consumption of the SAG mill,ball mill,and pebble crusher account for the specific energy of the whole process of 36.76%,55.75%and 0.83%,respectively.The operating power of the ball mill was close to 93.40%of the installed power,which limited the further improvement of the capacity of the grinding system.Based on the single-particle impact breakage test of a representative sample of raw ore,an.ore breakage model was established.The theoretical minimum brea kage energy consumption of the whole SABC comminution was calculated by the energy benchmarking method to be 8.96 kWh/t.SAG mill+vibrating screen+pebble crushing operations,ball mill and classification operations were evaluated on energy benchmark,and the energy efficiency factors(BEF values)were 2.19,1.71 and 2.60,respectively,which further clarified the energy utilization efficiency of ball mill and classification operations necessity.The energy benchmarking research provided a unified and quantitative evaluation index for the energy utilization efficiency of the comminution process,and pointed out the optimization direction for the production capacity improvement and energy saving and consumption reduction of the whole comminution circuit.