{"id":800,"date":"2020-04-10T09:19:06","date_gmt":"2020-04-10T09:19:06","guid":{"rendered":"http:\/\/alalloycasting.com\/?p=800"},"modified":"2020-08-26T06:33:27","modified_gmt":"2020-08-26T06:33:27","slug":"molten-aluminum-refining-degassing","status":"publish","type":"post","link":"https:\/\/www.alalloycasting.com\/tr\/molten-aluminum-refining-degassing\/","title":{"rendered":"Erimi\u015f Al\u00fcminyum Ar\u0131tma ve Gaz Giderme"},"content":{"rendered":"

Erimi\u015f al\u00fcminyumun ar\u0131t\u0131lmas\u0131 ve gazdan ar\u0131nd\u0131r\u0131lmas\u0131, al\u00fcminyum d\u00f6k\u00fcm end\u00fcstrisinde b\u00fcy\u00fck \u00f6nem ta\u015f\u0131maktad\u0131r. Al\u00fcminyum ve ala\u015f\u0131mlar\u0131n\u0131n kalitesini etkileyen bir\u00e7ok fakt\u00f6r vard\u0131r. Bunlar aras\u0131nda, erimi\u015f al\u00fcminyumdaki hidrojen i\u00e7eri\u011fi, kal\u0131nt\u0131lar ve alkali metal konsantrasyonu en \u00f6nemli fakt\u00f6rlerdir. Erimi\u015f al\u00fcminyumdaki hidrojen ve kal\u0131nt\u0131 i\u00e7eri\u011finin nas\u0131l azalt\u0131laca\u011f\u0131na dair pek \u00e7ok ara\u015ft\u0131rma yap\u0131lm\u0131\u015f olup, bu konuda bir\u00e7ok yeni proses ve erimi\u015f al\u00fcminyum ar\u0131tma y\u00f6ntemi geli\u015ftirilmi\u015ftir. gaz giderme ekipman\u0131<\/a> piyasaya \u00e7\u0131km\u0131\u015ft\u0131r.<\/p>\n

Erimi\u015f Al\u00fcminyum Ar\u0131tma ve Gaz Giderme<\/h2>\n

\u00c7evrimi\u00e7i gaz giderme i\u015flemi genel olarak gaz \u00fcfleme y\u00f6ntemleri, vakum ar\u0131tma y\u00f6ntemleri ve ultrasonik ar\u0131tma y\u00f6ntemleri olarak \u00fc\u00e7 gruba ayr\u0131labilir. Bu makale, gaz \u00fcfleme y\u00f6ntemine odaklanmaktad\u0131r.<\/p>\n

Gaz \u00dcfleme Y\u00f6nteminin \u00c7al\u0131\u015fma Prensibi<\/strong><\/p>\n

Gaz \u00fcfleme y\u00f6ntemi, ayn\u0131 zamanda y\u00fczd\u00fcrme y\u00f6ntemi olarak da bilinir. Bu y\u00f6ntem temel olarak, al\u00fcminyum s\u0131v\u0131s\u0131na inert gaz \u00fcflendikten sonra \u00e7ok say\u0131da k\u00fc\u00e7\u00fck kabarc\u0131k olu\u015fturmay\u0131 ama\u00e7lar. Kabarc\u0131k i\u00e7indeki hidrojenin ba\u015flang\u0131\u00e7 bas\u0131nc\u0131 s\u0131f\u0131rd\u0131r ve kabarc\u0131k ile s\u0131v\u0131 al\u00fcminyum aras\u0131ndaki aray\u00fczde bir hidrojen bas\u0131n\u00e7 fark\u0131 olu\u015fur; bu sayede al\u00fcminyum s\u0131v\u0131s\u0131nda \u00e7\u00f6z\u00fcnm\u00fc\u015f hidrojen s\u00fcrekli olarak kabarc\u0131\u011f\u0131n i\u00e7ine \u00e7ekilir. Ortamdaki hidrojen bas\u0131nc\u0131 e\u015fitlendi\u011finde bu s\u00fcre\u00e7 durur. Kabarc\u0131klar s\u0131v\u0131 y\u00fczeyinden y\u00fczeye \u00e7\u0131kt\u0131ktan sonra, kabarc\u0131klar\u0131n i\u00e7indeki hidrojen d\u0131\u015far\u0131 \u00e7\u0131karak atmosfere kar\u0131\u015f\u0131r.<\/p>\n

Buna ek olarak, kabarc\u0131klar eriyik i\u00e7indeki oksit kal\u0131nt\u0131lar\u0131yla kar\u015f\u0131la\u015f\u0131r. Kabarc\u0131klar, bu kal\u0131nt\u0131lar\u0131 y\u00fczeylerine tutar. Kabarc\u0131klar\u0131n y\u00fckselme s\u00fcreci, hidrojen gaz\u0131n\u0131 ve oksidasyon kal\u0131nt\u0131lar\u0131n\u0131 d\u0131\u015far\u0131 atarak hem gaz giderme hem de ar\u0131tma etkisini sa\u011flar.<\/p>\n

<\/div>\n

\"Erimi\u015f<\/p>\n

\u0130nert Gaz Giri\u015f Y\u00f6ntemi<\/strong><\/p>\n

Gaz \u00fcfleme y\u00f6nteminde, al\u00fcminyum eriyi\u011fine inert gaz\u0131n verilme \u015fekli, gaz giderme ve ar\u0131tma etkinli\u011fi \u00fczerinde b\u00fcy\u00fck bir etkiye sahiptir. \u015eu anda, eriyik d\u00f6k\u00fcm tesislerinde yayg\u0131n olarak kullan\u0131lan \u00fc\u00e7 y\u00f6ntem bulunmaktad\u0131r: gaz giderme borusu, nefes alabilen tu\u011fla ve d\u00f6ner gaz giderme.<\/p>\n

Gaz \u00fcfleme y\u00f6nteminin en basit \u015fekli, al\u00fcminyum eriyik i\u00e7ine bir ar\u0131tma borusu yerle\u015ftirmek ve ard\u0131ndan inert gaz ge\u00e7irmektir. Bu tek delikli tek borulu gaz giderme y\u00f6nteminin gaz giderme etkisi zay\u0131ft\u0131r. Baz\u0131 eriyik d\u00f6k\u00fcm tesisleri ayr\u0131ca f\u0131r\u0131n\u0131n taban\u0131na nefes alabilen tu\u011flalar yerle\u015ftirir. \u0130nert gaz, nefes alabilen tu\u011flalar\u0131n i\u00e7inden ge\u00e7erek \u00e7ok kanall\u0131 kabarc\u0131klar olu\u015fturur. Tek delikli \u00fcfleme y\u00f6ntemiyle kar\u015f\u0131la\u015ft\u0131r\u0131ld\u0131\u011f\u0131nda, g\u00f6zenekli \u00fcfleme y\u00f6nteminin gaz giderme ve ar\u0131tma etkisi biraz daha iyidir. Ancak, fiili kullan\u0131m s\u00fcrecinde, hava ge\u00e7irgen tu\u011flalar\u0131n kolayca t\u0131kanmas\u0131, al\u00fcminyum eriyi\u011finin s\u0131zmas\u0131, bak\u0131m ve onar\u0131mda zorluk ya\u015fanmas\u0131, eriyik y\u00fczeyinde ciddi \u00e7alkant\u0131 olu\u015fmas\u0131 ve daha fazla c\u00fcruf olu\u015fumu gibi dezavantajlar\u0131 vard\u0131r.<\/p>\n

Ara\u015ft\u0131rmalar\u0131n derinle\u015fmesiyle birlikte d\u00f6ner gaz giderme y\u00f6ntemi ortaya \u00e7\u0131km\u0131\u015ft\u0131r. Temel prensip, gaz giderme ve ar\u0131tma i\u015flemini ger\u00e7ekle\u015ftirmek amac\u0131yla d\u00f6nen rotor arac\u0131l\u0131\u011f\u0131yla al\u00fcminyum s\u0131v\u0131s\u0131na inert gaz\u0131n p\u00fcsk\u00fcrt\u00fclmesi ve b\u00f6ylece \u00e7ok say\u0131da da\u011f\u0131n\u0131k kabarc\u0131k olu\u015fmas\u0131n\u0131n sa\u011flanmas\u0131d\u0131r. Gaz giderme verimlili\u011fini art\u0131rmak i\u00e7in, inert gaz kabarc\u0131klar\u0131n\u0131n say\u0131s\u0131 m\u00fcmk\u00fcn oldu\u011funca fazla olmal\u0131d\u0131r. \u0130nert gaz kabarc\u0131klar\u0131n\u0131n \u00e7ap\u0131 k\u00fc\u00e7\u00fck, kalma s\u00fcresi uzun olmal\u0131 ve al\u00fcminyum eriyik y\u00fczeyi m\u00fcmk\u00fcn oldu\u011funca sabit tutulmal\u0131d\u0131r.<\/p>\n

Al\u00fcminyum S\u0131v\u0131 Gaz Giderici<\/h2>\n

Eksik istatistiklere g\u00f6re, \u015fu anda piyasada bulunan \u00e7evrimi\u00e7i gaz gidericilerden 99%\u2019si kutu tipi d\u00f6ner gaz gidericilerdir. Kutu tipi gaz gidericinin gaz giderme ve ar\u0131tma etkisi y\u00fcksektir ve \u0131s\u0131tma sistemi d\u00f6k\u00fcmdeki s\u0131cakl\u0131k kayb\u0131n\u0131 azaltabilir. Kutu tipi d\u00f6ner gaz giderici<\/a> kabarc\u0131klar\u0131n kalma s\u00fcresini uzat\u0131r ve b\u00f6ylece gaz giderme ve ar\u0131tma etkisini art\u0131r\u0131r.<\/p>\n

Al\u00fcminyum s\u0131v\u0131s\u0131 gaz giderme kabininin g\u00f6vdesine akar ve refrakter astar\u0131n i\u00e7inde kal\u0131r. Kabin g\u00f6vdesinde bir \u0131s\u0131t\u0131c\u0131 bulunur ve bu sayede al\u00fcminyum s\u0131v\u0131s\u0131 erimi\u015f halini korur. D\u00f6nen rotor arac\u0131l\u0131\u011f\u0131yla inert gaz\u0131n d\u0131\u015far\u0131 at\u0131lmas\u0131n\u0131n ard\u0131ndan \u00e7ok say\u0131da kabarc\u0131k olu\u015fur; bu k\u00fc\u00e7\u00fck kabarc\u0131klar al\u00fcminyum s\u0131v\u0131s\u0131 i\u00e7inde yay\u0131l\u0131r ve y\u00fckselerek hidrojeni giderir. K\u00fc\u00e7\u00fck kabarc\u0131klar\u0131n y\u00fckselme s\u00fcreci s\u0131ras\u0131nda, y\u00fczey geriliminin etkisiyle kabarc\u0131klar s\u0131v\u0131 y\u00fczeyinden kal\u0131nt\u0131lar\u0131 al\u0131r. Ayn\u0131 zamanda, rotorun kar\u0131\u015ft\u0131rma hareketi sayesinde al\u00fcminyum s\u0131v\u0131s\u0131ndaki ala\u015f\u0131m bile\u015fimi daha homojen hale gelir.<\/p>\n