{"id":8396,"date":"2022-01-12T08:19:30","date_gmt":"2022-01-12T08:19:30","guid":{"rendered":"https:\/\/www.aluminiumceramicfiber.com\/?p=8396"},"modified":"2022-01-12T08:19:30","modified_gmt":"2022-01-12T08:19:30","slug":"aluminium-degassing-device","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/ar\/aluminium-degassing-device\/","title":{"rendered":"Aluminium Degassing Device"},"content":{"rendered":"

Aluminium Degassing Device is based on the movement of dissolved hydrogen from a high concentration region (in the melt) to a low concentration region (in the inert gas).<\/span> Hydrogen is dispersed in the molten metal, just as it would be released in any confined space.<\/span> It will maintain a constant concentration throughout the melt.<\/span> Hydrogen migrates in liquid metals almost as fast as it migrates in the air.<\/span> Therefore, there is no need for every ounce of metal to come into contact with the inert gas. <\/span>The efficiency of aluminum degassing is determined by two factors, the rate of transmission at the metal\/gas interface and the total surface area available for transmission.<\/span><\/p>\n

\"Aluminium<\/p>\n

Conventional hydrogen degassing systems<\/a> use metal bubbling specialty gases (chlorine, Freon, or SF6) to accelerate hydrogen gas through the metal gas interface into large bubbles.<\/span> On wet days, there are practical limits to hydrogen removal, as large bubbles damage the surface, thereby increasing the metal’s surface area and then absorbing more hydrogen from the moist atmosphere.<\/span><\/p>\n

Chlorine was initially the gas of choice, but because of its danger, most foundries switched to other gases.<\/span> However, many foundries do not take into account the harmful substances released by the decomposition of any of the special gases used.<\/span><\/p>\n

Aluminium Degassing Device works by increasing the surface area of the inserted gas exposed to the metal.<\/span> The larger surface area increases the rate of transfer from the metal to the inert gas.<\/span> For a given volume of gas, the smaller the bubble size, the larger the surface area.<\/span> For example, a 1-inch diameter bubble has a surface area of 6 square inches.<\/span> If the same bubble is divided into 1\/16 inch diameter bubbles, the surface area increases to 96 square inches.<\/span> In other words, if you use the same volume of gas and reduce the diameter of the bubble to 1\/16 of its original diameter, the total surface area increases by 16 times.<\/span> Smaller bubbles interfere less with the surface of the melt and reduce the additional absorption of hydrogen from the moist atmosphere.<\/span><\/p>","protected":false},"excerpt":{"rendered":"

Aluminium Degassing Device is based on the movement of dissolved hydrogen from a high concentration region (in the melt) to a low concentration region (in the inert gas). Hydrogen is dispersed in the molten metal, just as it would be released in any confined space. It will maintain a constant concentration throughout the melt. Hydrogen […]<\/p>\n","protected":false},"author":1,"featured_media":8397,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[],"class_list":["post-8396","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog"],"yoast_head":"\nAluminium Degassing Device -sales@aluminiumceramicfiber.com<\/title>\n<meta name=\"description\" content=\"Aluminium Degassing Device is based on the movement of dissolved hydrogen from a high concentration region to a low concentration region.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.aluminiumceramicfiber.com\/ar\/aluminium-degassing-device\/\" \/>\n<meta property=\"og:locale\" content=\"ar_AR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Aluminium 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