![\"Gaz](\"http:\/\/alalloycasting.com\/wp-content\/uploads\/2021\/08\/Gas-Purification-Process.jpg\")
<\/p>\nMetal ar\u0131tma i\u015flemi, geri kazan\u0131lm\u0131\u015f al\u00fcminyum ala\u015f\u0131m\u0131 eriyigindeki gaz ve oksit kal\u0131nt\u0131lar\u0131n\u0131 ortadan kald\u0131rabilir veya en aza indirebilir; b\u00f6ylece eriyigin safl\u0131k derecesi art\u0131r\u0131l\u0131r. Geri d\u00f6n\u00fc\u015ft\u00fcr\u00fclm\u00fc\u015f al\u00fcminyum ala\u015f\u0131m\u0131 eriyiklerinin safl\u0131k gereksinimleri, farkl\u0131 \u00e7e\u015fitler ve kullan\u0131m alanlar\u0131 nedeniyle de\u011fi\u015fiklik g\u00f6sterir. Genellikle 100 g al\u00fcminyum ba\u015f\u0131na hidrojen i\u00e7eri\u011finin 0,2 ml'den az olmas\u0131 istenir; baz\u0131 \u00f6zel al\u00fcminyum ala\u015f\u0131mlar\u0131nda ise 100 g al\u00fcminyum ba\u015f\u0131na hidrojen i\u00e7eri\u011finin 0,1 ml'den az olacak \u015fekilde kontrol edilmesi gerekir. Ger\u00e7ek \u00fcretimde, hidrojen i\u00e7eri\u011fini \u00f6l\u00e7mek amac\u0131yla al\u00fcminyum ala\u015f\u0131m\u0131 yap\u0131s\u0131ndaki i\u011fne deli\u011fi derecesini niteliksel olarak analiz etmek i\u00e7in metalografik analiz y\u00f6ntemi kullan\u0131l\u0131r. Metalik olmayan kal\u0131nt\u0131lar\u0131n tespiti do\u011fru bir \u015fekilde nicel olarak \u00f6l\u00e7\u00fclemedi\u011finden, nicel gereklilikler belirlemek zordur ve bunlar yaln\u0131zca k\u00fcl\u00e7e yap\u0131s\u0131n\u0131n metalografik analizi ile \u00f6l\u00e7\u00fclebilir. Son olarak, eriyik ar\u0131tma i\u015fleminin etkisinin kalitesi kapsaml\u0131 bir \u015fekilde de\u011ferlendirilmeli ve ar\u0131tma i\u015fleminin proses parametreleri belirlenmelidir.<\/p>\n
Klor zehirli oldu\u011fu i\u00e7in insan sa\u011fl\u0131\u011f\u0131na zararl\u0131d\u0131r ve \u00e7evresindeki ekipmanlarda ciddi korozyona neden olur. Bu nedenle, geri d\u00f6n\u00fc\u015ft\u00fcr\u00fclm\u00fc\u015f al\u00fcminyum ala\u015f\u0131m\u0131 eriyi\u011finin mevcut metal ar\u0131tma i\u015fleminde genellikle N\u2082 veya N\u2082-Cl\u2082 kar\u0131\u015f\u0131m\u0131 gaz kullan\u0131larak \u00e7evrimi\u00e7i ar\u0131tma i\u015flemi uygulanmaktad\u0131r.<\/p>\n
Azot kimyasal olarak inaktif oldu\u011fu i\u00e7in, ar\u0131tma s\u0131cakl\u0131\u011f\u0131nda rejenere edilmi\u015f al\u00fcminyum ala\u015f\u0131m\u0131 eriyi\u011fi ve di\u011fer \u00e7\u00f6z\u00fcnm\u00fc\u015f gazlarla kimyasal reaksiyona girmez; ayr\u0131ca eriyikte \u00e7\u00f6z\u00fcnmez; bu nedenle, azot eriyik i\u00e7ine verildi\u011finde \u00e7ok say\u0131da kabarc\u0131k olu\u015fabilir.<\/p>\n
Bu azot kabarc\u0131klar\u0131nda hidrojen k\u0131smi bas\u0131nc\u0131 s\u0131f\u0131rd\u0131r; eriyikteki hidrojen k\u0131smi bas\u0131nc\u0131 ise s\u0131f\u0131rdan \u00e7ok daha y\u00fcksektir. Bu nedenle, eriyik ile azot kabarc\u0131klar\u0131 aras\u0131nda b\u00fcy\u00fck bir k\u0131smi bas\u0131n\u00e7 fark\u0131 vard\u0131r ve eriyikteki hidrojen kabarc\u0131klara akmaya devam eder. Dif\u00fczyon yoluyla hidrojen, kabarc\u0131ktaki k\u0131smi bas\u0131nc\u0131 eriyikteki hidrojenin k\u0131smi bas\u0131nc\u0131yla e\u015fit hale gelene ve denge sa\u011flanana kadar kabarc\u0131\u011fa girer.<\/p>\n
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Erimi\u015f metalden \u00e7ok say\u0131da azot kabarc\u0131\u011f\u0131 y\u00fczeye \u00e7\u0131kt\u0131\u011f\u0131nda, kabarc\u0131klar\u0131n i\u00e7indeki hidrojen atmosfere ka\u00e7ar; b\u00f6ylece kabarc\u0131klar s\u00fcrekli olarak olu\u015fur, yani erimi\u015f metalde \u00e7\u00f6z\u00fcnm\u00fc\u015f hidrojen s\u00fcrekli olarak uzakla\u015ft\u0131r\u0131labilir. Kabarc\u0131klar\u0131n y\u00fczeye \u00e7\u0131kma s\u00fcrecinde, inkl\u00fczyonlarla kar\u015f\u0131la\u015ft\u0131klar\u0131nda, y\u00fczey geriliminin etkisiyle inkl\u00fczyonlar kabarc\u0131klar\u0131n y\u00fczeyine yap\u0131\u015f\u0131r ve bu inkl\u00fczyonlar kabarc\u0131klar y\u00fckseldik\u00e7e uzakla\u015ft\u0131r\u0131l\u0131r. Sonu\u00e7 olarak, gaz\u0131n uzakla\u015ft\u0131r\u0131lmas\u0131 s\u0131ras\u0131nda inkl\u00fczyonlar da uzakla\u015ft\u0131r\u0131l\u0131r.<\/p>\n