By studying on the pyroelectricty of pyrite, the differences between ore-bearing and no ore-bearing by the pyroelectricty of pyrite were concluded, it could be a kind of the mark of ore-search in Tongchang ore area.

The studies of Pb isotope and tracking,and REE compositions of the ores,combined with the analysis of the rock-forming tectonic setting and dating data of mineralization,have shown that the copper deposit of Tongchang was formed from the post-magmatic hydrothermal process superimposed by the dynamic metamorphic hydrothermal solutions.

The process of dawing up-vibration-reverse thrust-interval is used in the continous cast system for copper product.

Study on Surface Chemical Polishing Processes Used for Copper Materials;

This paper introduces the harmfulness of grounding devices corrosion,the application situation of copper material grounding device at abroad,as well as the principle of grounding device corrosion,making comparative analysis of the performences and the costs with steel and copper material,and briefly introduces related application technology of copper matearial grounding device.