高压辊磨机料层分布对破碎效果影响的数值试验  

Numerical test on impact of distribution of material layer in high-pressure grinding mill on crushing effect

作　　者：赵鑫[1,2] 左宇军[1,2] 宋希贤[1,2] 

机构地区：[1]贵州大学矿业学院,贵州贵阳550025 [2]贵州大学贵州省非金属矿产资源综合利用重点实验室,贵州贵阳550025

出　　处：《化工矿物与加工》2013年第9期16-19,50,共5页Industrial Minerals & Processing

基　　金：国家科技支撑计划(No.2012BAB08B06);贵州省科技计划(工业攻关)项目(黔科合GY字(2011)3063)

摘　　要：为了研究高压辊磨机料层分布对破碎效果的影响,利用岩石破裂过程分析系统RFPA2D建立了高压辊磨机单层颗粒破坏与料层破坏的数值模型,分别探讨了高压辊磨机单层颗粒和料层多颗粒破碎的机理。数值模拟结果表明:高压辊磨机料层分布对破碎效果影响明显,其中高压辊磨机破碎料层颗粒时,在料层中间的矿石产生的破坏单元数相对较多;而单层颗粒破碎效率较低,辊面磨损较高,破坏单位体积能耗较高。因此,为了获得较高的破碎效率和节能效果,在设计高压辊磨机料层分布时应考虑对多颗粒矿石的破碎行为。A numerical model of the traditional single layer of particle crushing and material layer particle crushing in high-pres- sure grinding mill on crushing effect is built by rock failure process analysis 2D to research the impact of distribution of mate- rial layer in high-pressure grinding mill on crushing effect. Mech- anism of the single layer of particles and multiple layers of parti- cles in high-pressure grinding mill are discussed. Digital simula- tion proves that the high-pressure grinding mill with material lay- er distribution has the remarkable effect on crushing, especially, when high-pressure grinding mill breaks layer material particles, it breaks more effectively in the middle of material layer~ on the contrary, the crushing efficiency of the single particle is lower, roll surface wear is higher, per unit volume of damage needs higher energy. Therefore, crushing behavior of multiple particles ore should be considered to have better crushing rate and energy conservation in the design of the material layer distribution in high-pressure grinding mill.

关 键 词：高压辊磨机 料层颗粒破碎 单层颗粒破碎 静载荷 RFPA 

分 类 号：TD921[矿业工程—选矿]