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The working principle of degassing machine

The working principle of degassing machine

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  • Time of issue:2022-03-01 10:53
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(Summary description)Degasser is handcart degasser, equipped with imported hydraulic lift (or mechanical lifting system), rotor rotation, online measurement of liquid aluminum temperature. The degassing medium is 99.996 percent argon or nitrogen. Used for product degassing. Aluminum dihydrogen phosphate was prepared by heating alumina and phosphoric acid.

The working principle of degassing machine

(Summary description)Degasser is handcart degasser, equipped with imported hydraulic lift (or mechanical lifting system), rotor rotation, online measurement of liquid aluminum temperature. The degassing medium is 99.996 percent argon or nitrogen. Used for product degassing. Aluminum dihydrogen phosphate was prepared by heating alumina and phosphoric acid.

  • Categories:news
  • Author:
  • Origin:
  • Time of issue:2022-03-01 10:53
  • Views:

Degasser is handcart degasser, equipped with imported hydraulic lift (or mechanical lifting system), rotor rotation, online measurement of liquid aluminum temperature. The degassing medium is 99.996 percent argon or nitrogen. Used for product degassing. Aluminum dihydrogen phosphate was prepared by heating alumina and phosphoric acid. The graphite rotor in the liquid aluminum degasifier is impregnated, pressurized and solidified under vacuum condition, so that the density of the graphite rotor is increased from 1.6g/cm3 to 1.7g/cm3. The service life of the graphite rotor is increased more than 5 times than that of the original untreated graphite rotor, while the cost is only increased by 1%, and the strength of the graphite rotor is enhanced. Prolong the service life of graphite rotor in liquid aluminum purification process. Because, for degassing machine, we can draw a conclusion: "degassing machine is a kind of green liquid aluminum purification equipment."

The working principle of rotary degasser is to break large bubbles of inert gas into very small bubbles by rotating at high speed and spraying the rotor of inert gas, so that they are evenly dispersed in the molten metal. This allows more inert bubble surfaces to come into contact with hydrogen and impurities in the molten metal, bringing these harmful substances to the liquid level.

The key to degassing rotary degassing machine is that the rotor can break up the large bubble of inert gas into small bubbles, and make it diffuse to the whole molten metal. By reducing the bubble diameter, the surface area of the inert gas increases dramatically, so that more of the inert gas surface is in contact with hydrogen and impurities in the molten metal. As the bubble rises, hydrogen or impurities are removed from the molten aluminum.

When the inert gas in the degasser enters the liquid aluminum flow control can be adjusted according to the volume of the metal liquid to be treated to adjust the flow of gas, adjust the speed of the rotating rod and rotor, produce the appropriate size of bubbles, in order to facilitate the diffusion of inert gas.

Argon and nitrogen can be used as inert gases to degassed molten aluminum. The purity of the inert gas should be greater than 99.99 percent

A degasser sprays inert gas into molten aluminum to remove hydrogen. In addition, degassing is also considered to be a very effective method of flotation impurities. Two main theoretical models have been proposed to explain the mechanism of degassing. The macroscopic model assumes that the removal of each impurity is essentially similar. Due to the high vapor pressure of hydrogen, dissolved hydrogen diffuses into the gas injected into the liquid aluminum. In theory, the inclusion, which is 10 microns in diameter, comes into contact with the bubble, adsorbs to it and floats to the liquid surface.

The influence of the structure, size and position of the throttle on the size, number and distribution of refining bubbles was studied by using the self-developed equipment for purifying and degasifying aluminum alloy rotating spraying gold melt and the high-speed continuous shooting technology of digital camera. The results show that cuboid is the preferred structure of choke coil.

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