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Preparation of large particle size particulate bulk single crystal of ammonium molybdate, a genetic principle, by a subsequent calcination, reduction, molybdenum powder prepared really large size of the particles, followed by a mechanical treatment, to obtain rounded morphology, density, large size of molybdenum powder particles. This method is theoretically possible, but difficult for preparing large single crystals of ammonium molybdate particles larger, and follow the laws of hereditary molybdenum powder to quantify the size and morphology is not clear, the process is longer. 

 

1 mechanical granulation technology 

There will be added 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 the experiment show that this method increases molybdenum powder particle size is relatively simple, but much improved liquidity. 

 

2 Plasma granulation technology 

Plasma powder granulation technology in reshaping application of long-standing principle that, under the protection of the atmosphere, by some way the powder into the plasma flame core part, the use of up to several thousand degrees Celsius temperature to melt the powder particles, then freedom whereabouts during the use of the surface tension of the droplet own ball, spherical droplets of coolant through the chill was a large particle size, high-density spherical powder. Powder obtained in this way have 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 collecting such a large investment in equipment, maintenance is more difficult . 

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