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<\/p>\nAlkali elementleri (yani Na, Ca, K, Li) uzakla\u015ft\u0131rmak amac\u0131yla, erimi\u015f al\u00fcminyumun i\u015flenmesinde klor i\u00e7eren aktif ak\u0131 gaz\u0131n\u0131n kullan\u0131lmas\u0131 yayg\u0131n bir uygulamad\u0131r. Denge ko\u015fullar\u0131 alt\u0131nda, bu elementlerin her birinin klor\u00fcrleri reaksiyon \u00fcr\u00fcnleri olarak olu\u015fur. LiCl hari\u00e7, t\u00fcm bu halojen\u00fcr tuzlar\u0131, saf maddeler olarak normal i\u015fleme s\u0131cakl\u0131klar\u0131nda kat\u0131 haldedir; bu nedenle eriyik y\u00fczeyinde kolayca ayr\u0131l\u0131r ve s\u0131y\u0131rma yoluyla uzakla\u015ft\u0131r\u0131l\u0131r.<\/p>\n
Alkali elementler genellikle 500 ppm\u2019nin alt\u0131ndaki eriyik konsantrasyonlar\u0131nda bulunur. K\u00fctle etki yasas\u0131na g\u00f6re (reaksiyon h\u0131z\u0131, reaktifin konsantrasyonuyla orant\u0131l\u0131d\u0131r), AlCl\u2083 ve MgCl\u2082 (Mg varsa) gibi denge d\u0131\u015f\u0131 metastabil tuzlar olu\u015fur. Bu halojen\u00fcrler, havaya sal\u0131nan emisyonlar\u0131n i\u015flenmesine b\u00fcy\u00fck \u00f6l\u00e7\u00fcde katk\u0131da bulunduklar\u0131 i\u00e7in istenmez. Ayr\u0131ca, MgCl\u2082 1306\u00b0F'de erir ve genellikle normal eritme i\u015flem s\u0131cakl\u0131\u011f\u0131nda erir. Erimi\u015f tuz, s\u0131y\u0131rma amac\u0131yla y\u00fczeye \u00e7\u0131kar\u0131lmas\u0131 zor oldu\u011fu i\u00e7in \u00e7ok istenmez. Bu nedenle, alkali metal elementlerini reaksiyona sokarak erime noktas\u0131 daha y\u00fcksek tuzlar \u00fcretmeye b\u00fcy\u00fck ihtiya\u00e7 vard\u0131r; bu tuzlar, flotasyon yoluyla kat\u0131 halde y\u00fczeye daha etkili bir \u015fekilde ayr\u0131\u015ft\u0131r\u0131labilir.<\/p>\n
\u00d6rne\u011fin erimi\u015f al\u00fcminyum k\u00fctlesinde ak\u0131 gaz\u0131n\u0131n da\u011f\u0131t\u0131lmas\u0131na y\u00f6nelik mevcut y\u00f6ntemde, ak\u0131 gaz\u0131 eksenel y\u00f6nde a\u015fa\u011f\u0131 do\u011fru ana k\u00fctleye verilir ve \u015fafta monte edilmi\u015f d\u00f6nen bir pervane taraf\u0131ndan da\u011f\u0131t\u0131l\u0131r. Ancak bu y\u00f6ntemin baz\u0131 s\u0131n\u0131rlamalar\u0131 vard\u0131r. D\u00f6nen pervane, milin etraf\u0131nda bir girdap olu\u015fturur; bu da erimi\u015f metalin \u00e7o\u011funun, pervane milinin etraf\u0131nda pervane h\u0131z\u0131na yak\u0131n bir h\u0131zda d\u00f6nd\u00fc\u011f\u00fcn\u00fc g\u00f6sterir. Erimi\u015f metale eklenen ak\u0131, \u00e7ok az da\u011f\u0131l\u0131m g\u00f6stererek erimi\u015f metalle birlikte dola\u015fma e\u011filimindedir. Buna ek olarak, girdap, havaya maruz kalan eriyik y\u00fczey alan\u0131n\u0131 art\u0131r\u0131c\u0131 bir etkiye sahiptir. Erimi\u015f metalin havaya maruz kalma s\u00fcresinin artmas\u0131, k\u00f6p\u00fck olu\u015fumunun artmas\u0131na, ard\u0131ndan k\u00f6p\u00fc\u011f\u00fcn s\u00fcr\u00fcklenmesine ve bunun olumsuz yan etkilerine yol a\u00e7ar.<\/p>\n
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Ak\u0131 maddesi bir gaz oldu\u011funda, girdap ak\u0131mlar\u0131 ba\u015fka bir \u015fekilde sorunlara yol a\u00e7abilir. Ak\u0131 gaz\u0131 girdab\u0131n merkezine do\u011fru hareket eder ve bunun sonucunda eriyik maddenin di\u011fer k\u0131s\u0131mlar\u0131 ak\u0131 gaz\u0131 taraf\u0131ndan yeterince i\u015flenemez. Bu nedenle, eriyik metalin bir k\u0131sm\u0131 ak\u0131 maddesi taraf\u0131ndan i\u015flenmedi\u011fi i\u00e7in i\u015flemin etkinli\u011fi azal\u0131r. Ayr\u0131ca, erimi\u015f metal ak\u0131\u015f d\u00fczenine kar\u0131\u015fan ak\u0131 gaz\u0131 birle\u015fmeye meyillidir ve bu da eriyik metalde daha b\u00fcy\u00fck ak\u0131 gaz\u0131 kabarc\u0131klar\u0131n\u0131n olu\u015fmas\u0131na neden olur. Daha b\u00fcy\u00fck kabarc\u0131klar, i\u015flenen erimi\u015f metal miktar\u0131n\u0131 azaltt\u0131\u011f\u0131 i\u00e7in ak\u0131 i\u015fleminin verimlili\u011fini d\u00fc\u015f\u00fcr\u00fcr.<\/p>\n