Producing tungsten trioxide (WO3) usually involves multiple steps and processes. The following is a general production process:
Production process of tungsten trioxide 1 Raw material preparation
Firstly, the raw material of tungsten needs to be prepared. Commonly used raw materials include sodium tungstate (Na2WO4) or ammonium tungstate (NH4WO4). These raw materials can be obtained through extraction and processing of tungsten ore.
Tungsten trioxide production process 2 Raw material pretreatment
Raw materials of tungsten undergo pretreatment steps such as crushing, grinding and leaching to obtain a powder material suitable for subsequent processing.
Tungsten trioxide production process 3 Dissolution and purification
The powdery material of tungsten is dissolved in an appropriate acidic solution to form sodium tungstate or ammonium tungstate solution. During the dissolution process, some purification steps such as filtration and precipitation can be performed to remove impurities.
Tungsten trioxide production process 4 Precipitation and separation
By adjusting the pH value and temperature of the solution and adding an appropriate precipitant, the tungsten is precipitated in the form of tungsten trioxide. The precipitated tungsten trioxide solid can be separated and collected by filtration, washing and drying.
Tungsten trioxide production process 5 Calcination and heat treatment
The isolated solid tungsten trioxide is calcined and heat treated to further improve its purity and crystal structure. Calcination is usually performed at high temperatures to remove residual organics and moisture and to promote crystal formation and growth.
Tungsten trioxide production process 6 crushing and screening
The calcined tungsten trioxide is crushed and sieved to obtain the desired particle size and particle distribution.
The above is a basic production process, the actual production process may vary due to the scale of production and specific requirements. In industrial production, additional steps and process controls may also be involved to ensure product quality and consistency.
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