Tungsten Wire Production Process

Making tungsten wire is a complex and difficult process. The tungsten wire production process must be strictly controlled to ensure that the finished tungsten wire has the appropriate chemical composition and physical properties. Cutting corners early in the process to lower tungsten filament prices can result in poor finished product performance.

Because tungsten has the highest melting point of all metals, it cannot be extracted from the ore through traditional smelting methods.
Tungsten is extracted from the ore through a series of chemical reactions.

The exact process varies by manufacturer and ore composition, but the ore is crushed and then roasted and/or undergoes various chemical reactions, precipitation, and washing to obtain ammonium paratungstate (APT).

APT can be sold commercially or further processed into tungsten oxide. Tungsten oxide can be roasted in a hydrogen atmosphere to produce pure tungsten powder and water as a by-product. Tungsten powder is the starting point for tungsten grinding products, including tungsten wire. (Tungsten wire production process)

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