In recent years, the problem of environmental pollution has become increasingly serious, and the problem of energy shortage is also imminent. In the face of these two crises, people have launched scientific research on pollution control and environmental protection.

Scheelite is a kind of mineral resource which is not easy to be mined. It often coexists with calcium gangue, has low geological grade and is relatively difficult to beneficiate. In order to obtain qualified scheelite concentrate in industry, flotation technology is widely used in the process of selecting scheelite. The most traditional method is heating flotation.

Nano tungsten carbide is the main material of cemented carbide because of its high hardness and high strength. Two problems that restrict the development of nano-tungsten carbide cemented carbide are the difficulty in preparation of nano-tungsten carbide powder and the rapid growth of tungsten carbide particles in liquid phase sintering.

Ø9x200mm tungsten copper rod with diameter of Ø9mm and length of 200mm, the general diameter tolerance is ±0.5mm and length tolerance is 0 to +5mm. With excellent electrical and thermal conductivity, uniform microstructure, high temperature resistance, high strength, arc erosion resistance, high density; moderate conductivity and thermal conductivity.