{"id":5651,"date":"2019-09-03T08:07:12","date_gmt":"2019-09-03T08:07:12","guid":{"rendered":"http:\/\/www.adtechamm.com\/?p=5651"},"modified":"2019-09-03T08:07:12","modified_gmt":"2019-09-03T08:07:12","slug":"ceramic-foam-filter-molten-metal-filtration","status":"publish","type":"post","link":"https:\/\/www.adtechamm.com\/tr\/ceramic-foam-filter-molten-metal-filtration\/","title":{"rendered":"Seramik k\u00f6p\u00fck filtre ile erimi\u015f metal filtrasyonu"},"content":{"rendered":"

Seramik k\u00f6p\u00fck filtre ile erimi\u015f metal filtrasyonu<\/strong><\/p>\n

Y\u00fcksek kaliteli al\u00fcminyum \u00fcr\u00fcnlerinin \u00fcretimi i\u00e7in al\u00fcminyum k\u00fcl\u00e7eleri ve k\u00fct\u00fcklerin imalat\u0131, erimi\u015f al\u00fcminyumun \u00e7\u00f6z\u00fcnmeyen kat\u0131 maddeler veya kar\u0131\u015fmayan s\u0131v\u0131 kirlilikler gibi kal\u0131nt\u0131lardan nispeten ar\u0131nd\u0131r\u0131lm\u0131\u015f olmas\u0131n\u0131 gerektirir.
\nBu, sonraki \u00fcretim a\u015famalar\u0131ndan sonra elde edilen k\u00fcl\u00e7elerin veya k\u00fct\u00fcklerin, y\u00fcksek kaliteli \u00fcr\u00fcnler i\u00e7in \u00f6ng\u00f6r\u00fclen kat\u0131 gereklilikleri kar\u015f\u0131lamas\u0131 a\u00e7\u0131s\u0131ndan gereklidir.
\n\u00f6rne\u011fin sert ve esnek ambalaj malzemeleri, havac\u0131l\u0131k ve uzay end\u00fcstrisi i\u00e7in \u00fcr\u00fcnler (ekstr\u00fczyon profilleri, ince ve kal\u0131n sac levhalar, d\u00f6vme par\u00e7alar), litografik \u00fcr\u00fcnler, otomotiv end\u00fcstrisi i\u00e7in so\u011futucu borular\u0131 ve parlak y\u00fczey kaplamalar\u0131.
\nErimi\u015f al\u00fcminyum \u00fcretiminde, cevherden metalin \u00e7\u0131kar\u0131lmas\u0131, ya\u015fland\u0131rma, ala\u015f\u0131mlama ve d\u00f6k\u00fcm a\u015famalar\u0131 boyunca \u00e7\u00f6z\u00fcnmeyen safs\u0131zl\u0131klar veya kal\u0131nt\u0131lar olu\u015fur.<\/p>\n

Kirliliklerin ve kal\u0131nt\u0131lar\u0131n birincil elektrolitik indirgenmesi s\u00fcrecinde, elektrolit banyosundan \u00e7\u00f6z\u00fcnmeyen al\u00fcmina, al\u00fcminyum karb\u00fcrler, sodyum al\u00fcminyum flor\u00fcr ve gama al\u00fcmina kabu\u011fu olu\u015fur.
\nF\u0131r\u0131nda ya\u015fland\u0131rma ve ala\u015f\u0131mlama a\u015famalar\u0131nda, safs\u0131zl\u0131klar ve kal\u0131nt\u0131lar al\u00fcmina-magnezyum spinel, magnezyum oksit, gama-al\u00fcmina kabuklar\u0131 ve f\u0131r\u0131n birikintisi olu\u015fturur. D\u00f6k\u00fcm s\u0131ras\u0131nda metal transferi s\u0131ras\u0131nda, safs\u0131zl\u0131klar ve kal\u0131nt\u0131lar klor\u00fcr tuzlar\u0131, titanyum bor\u00fcr p\u0131ht\u0131lar\u0131, tahrip olmu\u015f refrakterler ve gama-al\u00fcmina kabuklar\u0131 olu\u015fturur.<\/p>\n

\"Seramik<\/p>\n

Erimi\u015f al\u00fcminyumun k\u00fcl\u00e7e veya k\u00fct\u00fck haline getirilmesinden \u00f6nceki son teknolojik a\u015famada, filtreleme yoluyla kal\u0131nt\u0131lar\u0131 gidermek amac\u0131yla seramik k\u00f6p\u00fck filtreli erimi\u015f metal filtrelemesi uygulanmas\u0131 tavsiye edilir.<\/p>\n

Al\u00fcminyum d\u00f6k\u00fcmhanelerinde kullan\u0131lan erimi\u015f metal filtrasyonu i\u00e7in seramik k\u00f6p\u00fck filtreler 1970\u2019lerin ba\u015f\u0131nda geli\u015ftirildi; bu teknolojinin ilk end\u00fcstriyel uygulamas\u0131 ise 1974 y\u0131l\u0131nda, ince ve kal\u0131n haddelenmi\u015f malzemelerin \u00fcretimi i\u00e7in d\u00fcz k\u00fcl\u00e7elerin imalat\u0131nda ger\u00e7ekle\u015ftirildi.
\nSeramik k\u00f6p\u00fck filtreli erimi\u015f metal filtrasyonu, tek bir d\u00f6k\u00fcm i\u015flemi i\u00e7in kullan\u0131lan monolitik, tek kullan\u0131ml\u0131k ve de\u011fi\u015ftirilebilir filtrelerdir.
\nFiltrenin g\u00f6zenek boyutu, cm ba\u015f\u0131na 4 ila 28 g\u00f6zenek (lineer in\u00e7 ba\u015f\u0131na 10 ila 70 g\u00f6zenek) aras\u0131ndad\u0131r; bu da yakla\u015f\u0131k 0,036\u20130,26 cm\u2019lik bir g\u00f6zenek \u00e7ap\u0131na kar\u015f\u0131l\u0131k gelir. Seramik k\u00f6p\u00fck filtreler genellikle 22,86 cm \u00d7 22, 86 cm \u00d7 5,08 cm ile 66,04 cm \u00d7 66,04 cm \u00d7 5,08 cm aras\u0131nda de\u011fi\u015fen boyutlarda kare kesitli olarak \u00fcretilir ve refrakter filtre kab\u0131na s\u0131\u011fmas\u0131 i\u00e7in kenarlar\u0131nda 17\u00b0'lik bir e\u011fim bulunur.
\nFiltre haznesinde filtreyi sabit tutmak ve metalin filtre kenar\u0131ndan sarkmas\u0131n\u0131 \u00f6nlemek amac\u0131yla, kenar pah\u0131na bir elyaf ka\u011f\u0131t contas\u0131 tak\u0131lm\u0131\u015ft\u0131r.
\nContan\u0131n lifli malzemesi genellikle yakla\u015f\u0131k 0,317-0,476 cm kal\u0131nl\u0131\u011f\u0131ndad\u0131r ve \u00e7o\u011funlukla silikat lifinden olu\u015fur.
\nGenellikle s\u0131zd\u0131rmazl\u0131k malzemesine vermik\u00fclit eklenir; bu madde \u0131s\u0131t\u0131ld\u0131\u011f\u0131nda genle\u015ferek s\u0131zd\u0131rmazl\u0131k bas\u0131nc\u0131n\u0131 art\u0131r\u0131r.
\nErimi\u015f al\u00fcminyumda tipik kullan\u0131m s\u00fcresi 30 ila 120 dakika aras\u0131ndad\u0131r.<\/p>\n

Erimi\u015f al\u00fcminyum ve ala\u015f\u0131mlar\u0131n\u0131 tutmak i\u00e7in kullan\u0131lan refrakter malzemeler alan\u0131nda uzman herhangi bir ki\u015fi i\u00e7in, seramik k\u00f6p\u00fck filtrede al\u00fcminyum oksit gran\u00fcl malzemesinin kullan\u0131lmas\u0131 bariz bir tercih olarak g\u00f6r\u00fcnmelidir.
\nAl\u00fcmina, erimi\u015f al\u00fcminyumda ve magnezyum i\u00e7eren ala\u015f\u0131mlar da dahil olmak \u00fczere yayg\u0131n ala\u015f\u0131mlar\u0131nda kimyasal a\u00e7\u0131dan nispeten inerttir.
\nAyr\u0131ca, hem eritme hem de erimi\u015f al\u00fcminyum ala\u015f\u0131mlar\u0131n\u0131 tutma ama\u00e7l\u0131 f\u0131r\u0131nlarda kullan\u0131lan refrakterlerde gran\u00fcl malzeme olarak yayg\u0131n bir \u015fekilde kullan\u0131lmaktad\u0131r.
\nBuna ek olarak, erimi\u015f al\u00fcminyumu filtrelemek i\u00e7in tek kullan\u0131ml\u0131k, de\u011fi\u015ftirilebilir seramik k\u00f6p\u00fck filtrelerin ortaya \u00e7\u0131kmas\u0131ndan \u00f6nce, lameller al\u00fcmina dolgu maddesi i\u00e7eren filtreler kullan\u0131l\u0131yordu.
\nSeramik k\u00f6p\u00fck filtre<\/a> Dolgu maddesi i\u00e7eren bu b\u00fcy\u00fck, \u0131s\u0131t\u0131lm\u0131\u015f kaplar, ba\u011flanmam\u0131\u015f lameller al\u00fcmina taneleri i\u00e7erir ve birka\u00e7 g\u00fcn, hatta haftalarca s\u00fcren tekrarl\u0131 d\u00f6k\u00fcm i\u015flemlerinde kullan\u0131l\u0131r.
\nDolgu maddeleri ve refrakterler i\u00e7eren filtrelerde oldu\u011fu gibi, erimi\u015f metalin ba\u011flanmam\u0131\u015f agregeli malzemelerle uzun s\u00fcre temas etmesi, al\u00fcminyum oksit gibi kimyasal olarak inert bir gran\u00fcl malzemenin kullan\u0131lmas\u0131n\u0131 gerektirir.<\/p>\n

Bununla birlikte, al\u00fcmina nispeten y\u00fcksek bir do\u011frusal termal genle\u015fme katsay\u0131s\u0131na (8,0 \u00d7 10\u207b\u2076 \/ \u00b0C) ve seramik k\u00f6p\u00fck filtreler gibi monolitik al\u00fcmina formlar\u0131, dengesiz \u0131s\u0131nman\u0131n sonucu olarak ortaya \u00e7\u0131kan termal gradyanlar ile y\u00fcksek termal genle\u015fme katsay\u0131s\u0131n\u0131n birle\u015fiminden kaynaklanan y\u00fcksek termal gerilimler nedeniyle d\u00fc\u015f\u00fck \u0131s\u0131 direncine sahiptir. \u00d6n \u0131s\u0131tma ve eriyikle ilk temas s\u0131ras\u0131nda.<\/p>","protected":false},"excerpt":{"rendered":"

Ceramic foam filter molten metal filtration The manufacture of aluminum ingots and billets for the production of high-quality aluminum products requires that molten aluminum be relatively free of inclusions, such as insoluble solids or immiscible liquid impurities. 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