细粒钢渣干式磁选精矿品位分形特性研究  

Study on fractal feature of concentrate grade for dry magnetic separation steel slag

作　　者：史长亮[1] 杨凯[1] 王海娟[1] 张义顺[1] 张兵豪 王飞跃[1] 

机构地区：[1]河南理工大学材料科学与工程学院,河南焦作454000

出　　处：《河南理工大学学报（自然科学版）》2014年第5期675-680,共6页Journal of Henan Polytechnic University（Natural Science）

基　　金：教育部高等学校博士学科点专项科研基金资助项目(20114116110005)

摘　　要：选取转炉钢渣经破碎、筛分,通过自行研制的磁选机进行不同磁辊转频、分选行程下干式磁选试验.基于分形理论,根据产率计算方法计算各粒级精矿品位值,建立双对数分形方程式,研究各分选参数下精矿品位分形特性.结果表明,不同磁辊转频和分选行程下分形维数均值分别为2.25和2.31,分形特性显著、磁选机分选性能稳定,分选行程相对于磁辊转频对精矿品位影响较大;分形维数与磁辊转频二次函数负相关、与分选行程二次函数正相关;以分形特性优化磁辊转频、分选行程为44.56 Hz和11.52 mm,精矿回收率、品位达66.75%和58.46%.The converter steel slag was crushed and screened for the magnetic separation experimental materi- al. The experiment was carried out with the self-developed magnetic separator at different magnetic roller fre- quencies （MRF） and magnetic separation distances （MSD）. And a double -logarithmic fractal equation was established to study the fractal characteristics of the concentrate grade. The concentrate grade was calculated according to yield concept. The results show that ： the mean value of fractal dimensions are 2.25 and 2.31 cor- responding to MRF and MSD. The fractal characteristics are significant and magnetic separator has a stable sor- ting process. The influence to a sorting process is more obvious form MSD than MRF. Fractal dimension has a negatively quadratic function relationship with MRF,opposite to MSD. Through fractal characteristics analyses, the MRF and MSD are optimized as 44.56 Hz, 11.52 mm, and the concentrate recovery and concentrate rate are 66.75% ,58.46% ,respectively.

关 键 词：细粒钢渣 干式磁选 精矿品位 分形特性 分形维数 

分 类 号：TD951[矿业工程—选矿]