Argon arc welding is an arc welding method using argon as a protective gas. Argon gas is used around the arc to form a continuous closed air flow to protect the arc and pool.

Tungsten electrode material is one of the key materials in argon arc welding technology. Cerium tungsten electrodes have been developed to replace radioactive thorium tungsten electrodes in the field of TIG and PLASMA technology.

Due to the increasing shortage of tungsten resources and more and more high impurities and low grade ores entering the tungsten smelting process, the content of impurities such as silicon, phosphorus, arsenic and tin in the sodium tungstate solution obtained by tungsten is becoming higher and higher. In order to produce tungsten products such as high purity ammonium para tungstate (APT) and tungsten oxide, sodium tungstate solution must be clean.

Before crystallization of ammonium para tungstate (APT), it is necessary to further remove molybdenum from the crystallization process of APT to obtain a more pure APT crystal product. The impurity removal rate in the crystallization process is directly related to the crystallization rate of APT. With the increase of the crystallization rate of APT, the precipitation rate of impurity increases rapidly. For the same concentration solution, when the crystallization rate of tungsten is increased from 60% to 80%, the crystallization rate of molybdenum will be increased by nearly 3 times. It is difficult to break through 80% of the crystallization rate.

As a solid waste, wolframite residue needs financial and material resources for harmless disposal.

The flotation of wolframite and scheelite is a difficult problem in the world. Because the composition and structure of the wolframite and scheelite are quite different, the conventional ore dressing method can not decompose the wolfram mixed ore perfectly.

Argon arc welding is an arc welding method using argon as protective gas, and the arc occurs between electrodes and weldments. Argon is formed around the arc to form a continuous closed air flow for protecting arc and molten pool.

Bismuth tungstate (Bi₂WO₆) is the most simple structure of Aurivillius type oxide. Its Bi₆s orbit and O₂p orbit are hybridized to form the valence band. The W5d orbit forms a guide band, and its band gap is narrower (about 2.7eV). It can absorb some visible light and be excited. Therefore, the Bi₂WO₆ photocatalytic material is in the field of environmental purification and new energy development. Potential application value.

Tungsten tailing is a solid waste produced after the selection of tungsten ore, which is used to recycle useful metals and non-metallic minerals, but the component of metal recycled group is less and still remains a large amount of tailings. It is used in the production of glass ceramics, non fired bricks and hollow bricks, with limited usage, high technological cost and limited application benefits.

The application of tungsten elements is very extensive. In order to improve the wear resistance of parts, the most fundamental method is to reduce the particle size of tungsten elements in the material to improve the wear resistance of super hard dies and bits.