Scientists have established a sound plasma smelting theory and solved a series of practical problems related to industrial promotion and application. In terms of metal purity, inclusion distribution and crystal structure, plasma technology is comparable to electroslag remelting, laser and electron beam remelting, vacuum induction melting and other technologies, and even plays a unique role in some fields.

Among the vacuum metallurgical process equipment, the plasma cooling bed smelting technology plays a particularly important role in the preparation of large-scale metal ingots and slabs (such as titanium alloy and special steel). Large domestic steel manufacturing enterprises and scientific research institutions have introduced the equal ion cooling bed furnaces of American retech company and German ALD company. The total power of the plasma gun has reached 3300mw, and the maximum titanium ingot is more than 7 tons.

The effect of plasma cooling bed smelting on removing high and low density inclusions is remarkable, but the process development is difficult, the production cost is high, and the stability is poor, which inhibits the rapid development of plasma smelting technology. In addition, the high-power plasma gun uses a large amount of helium, which puts forward new requirements for the establishment of gas purification and recovery devices. With the development of technology, plasma metallurgy technology has returned to people's vision again.