高压脉冲放电作用下破碎产物分形规律

高压电脉冲破碎是一种新型破碎技术，相比于传统机械破碎，具有能耗低、破碎产物单体解离度高、力学性能低等优势。通过建立破碎产物粒度分形模型及分形维数与筛下产率关系研究高压脉冲放电破碎颗粒粒度特性。研究表明，高压电脉冲破碎产物具有典型的粒度分形特征。针对负累计产率和筛孔尺寸在双对数坐标下进行线性拟合，结果表明，随着脉冲个数增加，线性回归系数增大、分形维数减小、残差平方和减小、计算值曲线和试验值曲线所围成的面积减小；随着给料粒度增大，线性回归系数减小、分形维数增大、计算值曲线和试验值曲线所围成的面积增大。破碎产物分形规律为研究矿石破碎粒度特性提供了新的思路。

Fractal Law of Crushed Product under High Voltage Pulse Discharge

High voltage electric pulse crushing is a new type of crushing technology. Compared with traditional mechanical crushing， it has advantages of low energy consumption， high degree of coarse grain dissociation and low mechanical properties of crushing products.The fractal model of the crushing product size and the relationship between fractal dimension and yield under the screen were established to study the particle size characteristics of high-voltage pulsed discharge crushing products.The results show that as the number of pulses increases， linear regression coefficient increases， fractal dimension decreases， residual sum of squares decreases， and the area of calculated value curve and experimental value curve decreases. As the grain size increases， the linear regression coefficient decreases， fractal dimension increases， and the area enclosed by the calculated value curve and the experimental value curve increases. Fractal law provides a new way to study the particle size characteristics of ore crushing.