Calciner for the Preparation of Violet Tungsten Oxide

Violet tungsten oxide with unique needle structure and high chemical activity has broad application prospects in the preparation of tungsten powder and tungsten carbide. Generally, it is obtained by calcining ammonium paratungstate in a calciner.

To obtain high-quality violet tungsten oxide, the selection of calciner is important. Here is a kind of calciner with good mechanical properties. Its technical parameters are as follow:

1. Specifications: φ120x2770, φ300x5800, φ390x7935

2. Rated power: 20 kW, 70kW, 96kW

3. Number of temperature zones: 2, 3, 4.5

4. Capacity: 0.25 t/24h, 1.5 t/24h, 4.5 t/24h

5. Size: 3300x700x1500, 7100x1600x2400, 9200x1800x2300

6. Operating temperature: 850°C

7. Maximum operating temperature: 900°C

8. Tube rotation speed: 0.5-8 rpm

9. Angele of inclination: 3-5°

10. Temperature control accuracy: ± 3°C

The following are the characteristics of the calciner:

1. The imported rotary furnace's graphite sealing ring is adopted, and the sealing is reliable.

2. The resistance wire is hung on both sides of the furnace and the ground. The furnace tube is evenly heated.

3. The fiber lining provides good heat preservation.

4. The calciner can be filled with hydrogen.

5. Screw feeder is used for feeding and lock valve is used for discharging.

When applied in the preparation of violet tungsten oxide, this kind of calciner not only improves the quality of the product, but also improves the production efficiency and reduces the production cost to the greatest extent. The calciner makes powder contact with gas sufficiently. Therefore, this kind of calciner is an ideal equipment for preparing ultrafine violet tungsten oxide. In addition, this type of calciner can also be used for the calcination of ammonium tungstate or ammonium molybdate. It can also be used to prepare molybdenum oxide powder as well. As the calciner has good mechanical properties, it has broad application prospects in many important fields.

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