Metal & Mining
| Tue 24 Mar 2026
Beijing, March 25 -- Yunnan Chihong Zinc & Germanium has sought patent for Selective Grinding and Grading Method for Lead-zinc Ore. This invention was developed by Liu Zhicheng, He Fei, Chang Weihua, Zhao Yun, Deng Wen, Huang Bo, Mu Xianhong, Guo Rong, Luo Xue, Zheng Xiaobing, Jiang Nianwu, Chen Xingwen and Zhang Zhirong.
The p..