Molybdenum News Center

Difficulty preparing large-grained molybdenum powder mainly 3:00: large size, high density, good liquidity. Satisfy the requirements of this 3:00 molybdenum powder morphology is the ideal large diameter solid sphere, which is a non-conventional molybdenum powder particle size loose group of different morphologies. In general, increased molybdenum powder reshaping technology are mainly two types of chemical and physical methods, techniques and physical methods were mechanical granulation granulation technology and plasma technology. Now briefly introduced physical method for preparing large-grained molybdenum powder. 

 

Mechanical granulation technology 

 

Will add a binder mixed molybdenum powder in the mold or pelletizing equipment, obtained by mechanical pressing a certain size, and then removing the binder, sintered particles of a certain intensity rule group. This method is simple in principle, but experiments show that this method increases molybdenum powder particle size is relatively simple, but much improved liquidity. 

 

Plasma granulation technology 

 

Granulation of the powder plasma application of reshaping a long time, the principle that, in a protective atmosphere, through a certain way the powder fed into the plasma flame core section, the use of up to several thousand degrees Celsius to melt the powder particles, and then the free whereabouts during the use of the surface tension of the droplet own ball, spherical droplets through chilled cooling medium was a large particle size, high-density spherical powder. Powder obtained by this method has good physical indicators, market prospects, but the larger its technical difficulty, especially in the more difficult to keep the powder transport and protective atmosphere, cooling the finished collection and other large investment in equipment, maintenance is more difficult .