螯合剂MZS在螯合微肥中的应用

本文经过大量的实验,已成功地从工业废水中提取廉价的螯合剂MZS,并找到了最佳提取工艺条件。同时测定和研究了MZS磺酸盐与某些金属离子的螯合性能,从而确定出最佳螯合比。将MZS应用于有机螯合微肥的生产,取得比较明显的经济效益。     

Minimum centroid neighborhood for minimum zone sphericity

The minimum zone sphericity tolerance is derived from the ANSI and ISO standards for roundness and has extensive applications in the tribology of ball bearings, hip joints and other lubricated pairs. The worst-case proposed in this paper provides theoretical evidence that the minimum zone center of the two (circumscribed and inscribed reference) spheres with minimum radial separation containing the sampled spherical surface is included in a spherical neighborhood centered in the centroid of radius 2π⁻²E_C, where E_C is the sphericity error related to the centroid, which can be determined in closed form.     

MZS5518湿式自磨机的技术改造

马钢南山矿业公司东山车间选矿厂针对目前矿石变硬并贫化,造成MZS5518湿式自磨机处理量下降、烧轴瓦事故频繁等问题,联合相关厂家对1#自磨机的衬板进行了改造,并将主轴承由滑动轴瓦改为专门研制的滚动轴承。改造后获得了处理能力提高、衬板使用寿命延长、节电、节油及设备故障率降低等显著效果,每年可多创造至少1 290.1万元的直接经济效益。