Anti-oxidant Wear-resistant Graphite Degassing Lance for Smelting

Graphite rotor is a part of the supporting equipment for aluminum alloy smelting. Hydrogen gas and oxidized waste slag will be produced during the aluminum alloy smelting process. It must be purified and removed by the refining degasser. The graphite rotor is indispensable for the refining degassing and slag removal machine. one of the accessories. Graphite rotor consists of shaft, bolt and fan, used for purification, slag removal, degassing, blowing, etc. in the casting industry of aluminum, alloy, zinc, etc.

Working principle: Submerge the impeller end and part of the shaft of the graphite rotor into the molten aluminum at 690°C-780°C, and the transmission system drives the graphite rotor to rotate at a rotation speed of 500 rpm, working for 1 to 2 hours at a time, 4 to 6 hours a day Second, according to the working conditions of the equipment, the graphite rotor can also work continuously. The inert gas (argon or nitrogen) is blown into the aluminum melt through the rotor rod and nozzle, and the high-speed rotating graphite rotor breaks up the argon or nitrogen entering the aluminum melt to form many small bubbles, which disperse them in the molten metal. The rotating rotor also promotes the diffusion of hydrogen and inclusions in the aluminum melt, making them contact with the bubbles. The bubbles in the melt rely on the gas partial pressure difference and the principle of surface adsorption to absorb hydrogen in the melt, adsorb oxidized slag, and As the bubbles rise, they are taken out of the surface of the melt, so that the melt can be purified.

Precautions for operation: Before immersing the graphite rotor in the aluminum liquid, preheat it for 5 minutes to 10 minutes at about 100mm above the liquid surface to avoid the impact of rapid cooling on the material; before the rotor is immersed in the liquid, it must be filled with gas; the rotor can only be used after it is raised from the liquid surface Stop the air supply to prevent clogging of the air holes of the rotor nozzle.

The anti-oxidation graphite rotor produced by our company is aimed at the defects that the graphite rotor is easy to oxidize, break and not wear-resistant under high temperature and aerobic conditions. We choose high-quality graphite raw materials for reasonable matching, and then choose no pollution to the aluminum melt. The high-temperature-resistant graphite antioxidant independently developed by the company, through the production line of special equipment for anti-oxidation treatment, through impregnation treatment, high-temperature roasting, and precise processing, our company's unique anti-oxidation graphite rotor is manufactured, which has the ability to resist oxidation under high-temperature and aerobic conditions. Oxidation, anti-friction, high hardness, high flexural and compressive strength. After anti-oxidation treatment, the service life of graphite materials can reach 5-10 times that of ordinary products, and it can be used continuously for 90-120 days for a long time. It reduces the cost in the production process of the user's refined aluminum casting online degassing.

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