Tungsten Oxide

Deal with mineral stones containing two or more useful minerals, the single concentrate is sequentially selected from useful  minerals. This process is called preferential flotation. Deal with mineral stones containing two or more useful minerals, first, mix up and emerge useful minerals, then, gradually separated them. This process is called mixed flotation. The preferential flotation process has high flexibility. It can adapt to the change of mineral stone grade. But it requires a higher content of the main mineral stones. There should not be too many associated mixed minerals.  The advantage of the mixed flotation process is that a large amount of gangue can be discarded after flotation. It reduces the amount of minerals that goes into follow-up procedure and cut down the subsequent cost of the action. But mixed flotation also has a painful problem, after flotation, the concentrate surface is sticky with collecting agent. Surp...

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Blue tungsten oxide  is one of the important raw materials for making tungsten powder. As an important intermediate of tungsten in modern industry, it has been popular for many years.  The commom methods of preparing blue tungsten oxide are APT closed calcination method and hydrogen mild reduction method etc. Although they have been popularized for many years, they have more or less some environmental safety factors. As a result, people have never abandoned the quest for a more effective and environmentally friendly method for producing blue tungsten oxide. APT autoreduction method is an upgraded version of the APT hydrogen mild reduction method. What's different between them is that the APT autoreduction method does not add hydrogen or ammonia into the reacting furnace, instead, the heating temperature is increased to 600°C -800°C. APT decomposes hydrogen under high temperature....

Tungsten powder is the main raw material for processing powder metallurgy tungsten and tungsten alloy.  In the extraction and smelting of tungsten, the production of metal tungsten powder is a key step in the production of tungsten and tungsten alloy because the properties of tungsten powder largely affect the subsequent operation of tungsten products. Pure tungsten powder can be made into wires, bars, tubes, plates and other processed materials and products of a certain shape. Tungsten powder and other metal powder, can be made into all kinds of tungsten alloy, such as tungsten molybdenum alloys, tungsten rhenium alloy, tungsten copper alloy and high density tungsten alloy. Another important application of tungsten powder is to make tungsten carbide powder, and then prepare carbide tools, such as turning tools, milling cutters, drills and dies, etc. Hydrogen tungsten reduction and carbon reduction are the main methods for the production of tungsten powd...

Tungsten powder is the main raw material for processing powder metallurgy tungsten products and tungsten alloys. With the rapid development of science and technology and extensive and deep research on nanometer technology, ultrafine tungsten powder has been developed and applied widely. Ultrafine tungsten powder in the field of materials, through nanoparticles and a variety of ultra-fine structural modules, led to the emergence of many new materials with excellent properties and new applications. Ultrafine tungsten powder is superior to common coarse grain material in mechanical, physical and chemical properties because of its ultrafine grain and large amount of atoms on the grain boundary. Ultrafine tungsten powder can be divided into three grades according to particle size: submicron tungsten powder (<1 um), ultrafine tungsten powder (<0.5 um) and nano tungsten powder (<100 nm). The most widely used tungsten powder is nanometer grade tungsten powder. U...

Blue Tungsten Oxide is one of the important raw materials for making tungsten powder. Compared with yellow tungsten, blue tungsten oxide is considered to be an upgraded version of yellow tungsten oxide because of its good activity, large surface area, easy to dope and maintain original crystal shape. And it’s widely used. There are three main methods for making blue tungsten, APT closed calcination method, APT hydrogen light reduction method, intrinsic reduction method. APT closed calcination is one of the most widely used methods. APT closed calcination method is the most used to produce blue tungsten oxide production. The characteristics of APT closed calcination method is: use thermal decomposition of ammonia or a small amount of ammonia into the reducing agent, thermal decomposition temperature fluctuations in the range of 550 °C - 700 °C,  high yield, stable quality, which is composed of 70%W 20 O 58  blue tungsten oxide, 30WO 3 ...