{"id":4910,"date":"2020-12-24T09:13:12","date_gmt":"2020-12-24T09:13:12","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=4910"},"modified":"2020-12-24T09:13:12","modified_gmt":"2020-12-24T09:13:12","slug":"degassing-equipment-for-molten-aluminum","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/ar\/degassing-equipment-for-molten-aluminum\/","title":{"rendered":"Degassing Equipment for Molten Aluminum"},"content":{"rendered":"

At present, the on-line degassing equipment\u00a0functions for molten aluminum are degassing, slag removal, and alkali removal. In addition, degassing equipment also has the function of adjusting the heat balance of the molten aluminum in the launder.<\/p>\n

\"Degassing<\/p>\n

Degassing Function<\/strong><\/p>\n

On-line degassing generally uses nitrogen or argon as the degassing carrier, and it is also possible to add 2-5% chlorine gas to the carrier gas to improve the effect of degassing and alkali removal.<\/p>\n

The degassing principle of \u0648\u062d\u062f\u0629 \u0625\u0632\u0627\u0644\u0629 \u0627\u0644\u063a\u0627\u0632\u0627\u062a \u0639\u0628\u0631 \u0627\u0644\u0625\u0646\u062a\u0631\u0646\u062a<\/a> is consistent with the basic principle of refining and degassing in the furnace. It is still degassing through partial pressure difference and chemical reaction. However, unlike the refining in the furnace, the high-speed graphite rotor impeller of the online degassing equipment can The bubbles are cut into numerous dispersed small bubbles. These small bubbles will be more evenly distributed in the limited space of the degassing box, which greatly increases the surface area of \u200b\u200bthe bubbles and significantly improves the partial pressure difference degassing effect.<\/p>\n

If chlorine is added to the carrier gas, the degassing effect will be more secure, and the alkali removal effect will be significantly enhanced. Chlorine gas is highly toxic and has potential safety hazards, which requires strict management and use.<\/p>\n

Different on-line degassing methods have different degassing effects. At present, box degassing equipment and launder degassing are commonly used. Among them, box degassing is the mainstream, the operation effect is stable, and the degassing efficiency is also high (specific degassing The gas efficiency is related to the design of the degassing box and the initial hydrogen content, generally 35-70%), but the one-time investment and operating costs are relatively high.<\/p>\n

Slag Removal Function<\/strong><\/p>\n

The slag removal in the online degassing stage only has a separate adsorption and slag removal. The tiny slag will be adsorbed on the bubbles and float on the surface of the molten aluminum, so the aluminum slag in the degassing box needs to be cleaned regularly.<\/p>\n

Alkali Removal Function<\/strong><\/p>\n

The alkali removal of on-line degassing is mainly achieved by adding chlorine gas to the carrier gas. Pure argon has no alkali removal effect, while nitrogen has a weaker removal effect on individual alkali metals.<\/p>\n

Heart Balance Function<\/strong><\/p>\n

The box-type degassing equipment for molten aluminum is equipped with an immersion heater, which can pre-fill the molten aluminum into the degassing box to increase the temperature, and avoid the safety and quality risks caused by the low temperature of the molten aluminum in the initial stage of casting. During the production process, the temperature of the molten aluminum can also be adjusted by starting and stopping the heater in the degassing box to maintain the stability of the molten aluminum temperature during the casting process.<\/p>","protected":false},"excerpt":{"rendered":"

At present, the on-line degassing equipment\u00a0functions for molten aluminum are degassing, slag removal, and alkali removal. In addition, degassing equipment also has the function of adjusting the heat balance of the molten aluminum in the launder. Degassing Function On-line degassing generally uses nitrogen or argon as the degassing carrier, and it is also possible to […]<\/p>\n","protected":false},"author":1,"featured_media":4911,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[85],"tags":[],"class_list":["post-4910","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-seo"],"yoast_head":"\nDegassing Equipment for Molten Aluminum, Degassing Unit<\/title>\n<meta name=\"description\" content=\"Degassing equipment\u00a0functions for molten aluminum are degassing, slag removal, and alkali removal. 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