超低品位磁铁矿矿岩破碎能耗优化研究  

Study on Energy Consumption Optimization of Crushing Ultra Low Grade Magnetite Ore and Rock

作　　者：杜广盛 武海龙 高云峰 陈世江 DU Guangsheng;WU Hailong;GAO Yunfeng;CHEN Shijiang(College of Mining and Coal,Inner Mongolia University of Science and Technology,Baotou 014010,China;Key Laboratory of Mining Engineering of Inner Mongolia,Baotou 014010,China;Wulat Front Banner Yuanda Business Company with Limited Liability Inner Mongolia,Bayannur 014400,China)

机构地区：[1]内蒙古科技大学矿业与煤炭学院,内蒙古包头014010 [2]内蒙古自治区矿业工程重点实验室,内蒙古包头014010 [3]乌拉特前旗元大商贸有限责任公司,内蒙古巴彦淖尔014400

出　　处：《金属矿山》2023年第1期181-187,共7页Metal Mine

基　　金：内蒙古自治区自然科学基金项目(编号:2019MS05011)。

摘　　要：低品位矿山的矿岩破碎能耗问题是绿色矿山建设中节能减排的重要环节。经典破矿理论中矿岩质量和矿石破碎粒径比是能耗的两个主要影响因素。基于内蒙古地区某露天矿实际情况,为精准有效地降低矿岩破碎能耗,结合破碎功耗学说,采用实验室测得矿岩力学参数b对矿岩质量进行定量化分析并计算出能耗比,利用不同适用性的能耗公式对多级破碎能耗进行求解,从而分析在各个破矿工序中不同力学性质和粒度的矿岩破碎能耗指标。结果表明:该矿山围岩与矿石力学性质有较大差异,引入力学性质参数b可以有效地表征出能耗差异,提供了优化能耗的依据。针对力学性质差异较大的岩石可以分离后再破碎;在破矿设备和矿岩质量稳定且有多级破碎需求时,矿岩每次破碎粒度差异不宜过大,矿岩初次破碎应至125 mm粒径,后续多级破碎粒度比为40%时能耗较低。The energy consumption of rock crushing in low grade mines is an important link of energy saving and emission reduction in green mine construction. In classical mining theory,rock quality and ore crushing particle size ratio are the two main influencing factors of energy consumption. Based on the actual situation of an open-pit mine in Inner Mongolia,in order to reduce energy consumption of ore-rock crushing accurately and effectively,combining with the theory of power consumption of crushing,the quality of ore-rock is quantified and the energy consumption ratio is calculated by using the mechanical parameters b measured in the laboratory. Energy consumption of multi-stage crushing is solved by using energy consumption formulas with different applicability,and the results of energy consumption index of ore-rock crushing with different mechanical properties and grain sizes in each crushing procedure are analyzed. The result shows that there are great differences between the mechanical properties of surrounding rocks and ores in this mine. The introduction of mechanical property parameter b can effectively characterize the difference of energy consumption and provide the basis for optimizing energy consumption. Rocks with different mechanical properties can be separated and re-crushed;when the quality of breaking equipment and rock is stable and there is multi-stage crushing demand,the difference of particle size of each crushing should not be too large,and the ore and rock can be crushed again. The initial crushing should be with a particle size of 125 mm. The energy consumption of subsequent multi-stage crushing with a particle size ratio of 40% is lower.

关 键 词：能耗优化 岩石力学性质 破碎能耗 粒径比 废石利用 

分 类 号：TD981[矿业工程—选矿]