The production of tungsten oxide can use the alkali fusion method. The following are the general steps for producing tungsten oxide by alkali fusion method:
Prepare Raw Materials
Crush and grind tungsten concentrate or other tungsten-containing raw materials to obtain tungsten powder with appropriate particle size.
To Melt
Mix tungsten powder with an alkaline substance such as sodium carbonate (Na2CO3) or sodium bicarbonate (NaHCO3). The mixture is usually melted in a high temperature furnace, typically between 800°C and 900°C.
Alkali Fusion Reaction
At high temperature, the alkaline substance reacts with tungsten powder to form tungstate (such as tungstate carbonate), which is dissolved in the molten alkaline substance.
Filter
Cooling the melt allows it to solidify and form solid particles. Then, the solid particles are separated from the melt by filtration.
To Dissolve
The solid particles are leached, and water or other solvents are used to dissolve the tungstate from the solid.
Separate
The impurities in the solution are separated by methods such as filtration or centrifugation.
Crystallization
By adjusting the conditions of the solution, such as temperature and concentration, the tungstate is crystallized to form tungstate crystals.
Roasting
The tungstate crystals are heat-treated to transform them into tungsten oxide.
Crushing And Sieving
The calcined tungsten oxide is crushed and sieved to obtain the desired particle size.
Packaging And Storage
Pack the tungsten oxide well and store it properly for subsequent use or sale.
This is the general process of producing tungsten oxide by alkali fusion method. The specific production process and operating conditions may vary depending on the manufacturer and equipment. In actual production, it is also necessary to pay attention to the requirements of safe operation and environmental protection.
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