Though W grade can be increased, it is difficult to better recover tungsten with mechanical beneficiation methods.
矿石中钨品位虽可得到提高，但采用机械选矿方法却难以较好回收。
2
The paper present the new developments of Ni-W coat, Ni-W-B coat, tungsten composite coat and tungsten brush coat etc.
介绍了镍钨镀层、镍钨硼（磷）镀层、含钨复合镀层和含钨电刷镀镀层等的研究与开发的近期进展。
3
The chemical dissolution methods to separate and recover tungsten, molybdenum and cobalt in tungsten scraps such as mixed W-Mo wires (bars) and alloy scraps are discussed.