Abstract
Paste filling has been successfully used in Chihong Zinc and Germanium Mine (CZGM), which becomes the third mine to use this technology in China. Several current challenges faced by CZGM, such as lacking unclassified tailings, small particle size, limited surface for waste dumping, unusual nature of condensation, have prompted the choice of paste fill technology. A large number of laboratory experiments have been conducted to ensure the feasibility of paste filling in CZGM. Flow loop testing has been completed to investigate factors affecting the one way resistance with the result suggesting that the resistance along the way is 8 MPa/km. In practice, the true resistance is much smaller than this value. Simple process is the fundamental reason for the successful application of paste filling in CZGM. For unclassified tailing dewatering, a deep-cone thickener was used as one-part dehydration, and cement was added on ground without water. One-part pumping was selected instead of two-part horizontal hydraulic twin piston pump. The advanced distributed control system (DCS) was selected as well. The current problems faced by the filling system were analysed, and reasonable methods for addressing those problems have been put forward.
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