矿岩粉碎颗粒分形结构与粉碎能耗的关系

用半自动图象分析系统测定了矿岩粉碎后颗粒的周边分形结构,得到粉碎后颗粒表面的分维数在2.033—2.110范围,其分维数随粒度减小而有所增大。按粉碎能耗增量正比?颗粒分形结构的表面积增量原理,得到和Hukki粉碎能耗表达式相同的结果,后者是概括了Rittinger,Kick和Bond三大粉碎能耗学说的共同表达式。     

矿岩料层动态粉碎过程的试验装置

研制了矿岩料层动态粉碎性能测试装置。该装置以火药爆炸产生的高温高压气体作为动力，推动冲击杆迅速运动，将冲击载荷以脉冲波形式作用于料层。建立了矿岩料层粉碎力学过程的测试系统。该系统不但可测试料层粉碎初始瞬间所承受的冲击末速度，而且还可直接捕捉参予试验物料内部粉碎过程的全部载荷信息和全部位移信息。文中给出了三种矿岩试料层的动态载荷位移全过程曲线。     

A CONTINUOUS DAMAGE APPROACH TO RELATIONSHIP BETWEEN SIZE REDUCTION AND ENERGY CONSUMPTION DURING ORE COMMINUTION

Based upon the aspect of continuous damaging,the process of ore comminution may be des-cribed as the growth and propagation of the microcracks in the ore grains under external load-ing,and a theoretical expression has been developed on the relationship between the grain sizedistribution and the total energy consumption during entire ore comminution process.The en-ergy consumed totally may be considered consisting of two portions,i.e.with fresh crack sur-faces growth and with crack propagation.The proposed expression seems to be an advanceover previous conventional ones,especially that from the viewpoint of energy distribution.     

燃煤锌锅降低锌耗及延长寿命的探讨

通过国产燃煤式锌锅与引进燃油式锌锅工艺参数比较，分析了国产锌锅的寿命低、锌耗高的原因；介绍了该厂在提高燃煤锌锅寿命及降低锌耗方面所采取的技术措施及其效果。     

Cu附着膜的屈服强度与退火温度的关系

利用X射线拉伸实验研究了具有二维残余应力的Cu附着膜的屈服强度与退火温度的关系．结果表明，Cu附着膜的条件屈服点随着退火温度的增高而减小，退火温度在150—300℃间变化时，减小幅度最大，出现明显的拐点．这主要由于Cu附着膜在该温度范围内发生了再结晶，使得原有的大部分组织结构强化因素消失了．Cu附着膜的屈服强度远远高于块体Cu材的屈服强度．