Online Degassing Device used for Degassing and Slag Removal

The aluminum melt online processing device is mainly composed of an online degassing device, a filtering device, an electric control system, a hydraulic system, a refined gas control cabinet, and a connecting ceramic launder (between the degassing unit and the filtering unit).

Online Degassing Device

Equipment Function

(1) The online degassing device is used for on-line degassing and slag removal outside the furnace of the aluminum melt. The hydrogen content in the aluminum melt after the online degassing device meets the requirements of the casting process.

(2) The filter box is used for on-line filtration of aluminum melt outside the furnace to remove non-metallic inclusions in the aluminum melt and improve the quality of the aluminum melt.

Working Principle

A certain flow of inert gas is injected into the molten aluminum, and the injected gas is dispersed into tiny bubbles through a rotating mechanism, and diffuses and rises evenly in the molten aluminum, effectively removing the hydrogen in the molten aluminum. At the same time, during the rising process of the small bubbles, the surface tension of the small bubbles can also bring some inclusions out of the melt. Through the stirring of the rotating jet head in the melt, the alloying elements in the melt can be made more uniform.

Online Degassing Device

Online Degassing Device

①The refining furnace box is composed of steel shell, ceramic fiber board, high-performance high-aluminum castable lining, etc.

② The refining furnace cover is composed of a steel shell and fiber blocks. The upper part of the furnace cover is equipped with a pipeline covering the protective gas, and the protective gas is preheated by the furnace cover before entering the box, so as to avoid the heat loss after the covering gas enters.

③Using the immersion heating method, the silicon carbide rod is placed in a special material protective sleeve, and the whole is installed in the furnace body to heat and keep the molten aluminum through radiation and convection. There is no need to discharge the molten aluminum when the machine is shut down to ensure that the 24h heat preservation. The melt temperature is continuously measured and displayed, and the parameter display and setting can be realized on the temperature control intelligent instrument.

④The graphite rotor assembly is composed of a rotating nozzle and a rotating shaft. Its special structure is ingeniously matched with a specially designed refining chamber to make the generated bubbles better dispersible, which can slow down the bubble rise speed and increase the bubble capture hydrogen and impurities At the same time, it avoids the generation of vortex on the surface of the melt, so as to achieve the effect of efficient degassing, slag removal and alkali metal removal.

⑤The hydraulic cylinder lifting device can lift the graphite rotor assembly separately, which is convenient for the maintenance and replacement of the graphite rotor.

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