{"id":1316,"date":"2020-06-14T09:36:14","date_gmt":"2020-06-14T09:36:14","guid":{"rendered":"https:\/\/aluminiumceramicfiber.com\/?p=1316"},"modified":"2020-10-30T08:00:15","modified_gmt":"2020-10-30T08:00:15","slug":"alumina-refining","status":"publish","type":"post","link":"https:\/\/www.aluminiumceramicfiber.com\/tr\/alumina-refining\/","title":{"rendered":"Al\u00fcmina Ar\u0131tma"},"content":{"rendered":"<p>K\u00fcresel birincil al\u00fcminyum end\u00fcstrisi, \u00e7evre kirlili\u011fi ve karbon emisyonu su\u00e7lamalar\u0131 nedeniyle s\u00fcrekli bask\u0131 alt\u0131nda kalmaktad\u0131r. A\u00e7\u0131k ocak boksit madencili\u011finden ba\u015flayarak, kostik soda ile li\u00e7leme y\u00f6ntemine dayanan Bayer al\u00fcmina ar\u0131tma s\u00fcrecine ve al\u00fcminyum eritmede flor\u00fcrle erimi\u015f tuz elektroliz s\u00fcrecine kadar al\u00fcminyum \u00fcretiminin her a\u015famas\u0131nda; \u00e7ok say\u0131da \u00e7evre tahribat\u0131 sorunu s\u00f6z konusudur. Bununla birlikte, k\u00fcresel al\u00fcminyum end\u00fcstrisi bu konudaki durumunu iyile\u015ftirmek i\u00e7in uzun s\u00fcredir ciddi \u00e7abalar g\u00f6stermektedir.<\/p>\n<h2>Al\u00fcmina Rafine Etmenin \u00c7evresel Boyutlar\u0131<\/h2>\n<p>Al\u00fcminyum end\u00fcstrisinden kaynaklanan kirlili\u011fin en \u00f6nemli sorunlar\u0131ndan biri, al\u00fcmina \u00fcretimi i\u00e7in boksitin Bayer y\u00f6ntemiyle rafine edilmesiyle ba\u015flar. Bayer i\u015flemi s\u0131ras\u0131nda ortaya \u00e7\u0131kan \u00e7\u00f6z\u00fcnmeyen \u00e7amur halindeki at\u0131k, \u201cK\u0131rm\u0131z\u0131 \u00c7amur\u201d olarak adland\u0131r\u0131l\u0131r. Bu, ana maden olan boksitte ba\u015flang\u0131\u00e7ta bulunan al\u00fcmina d\u0131\u015f\u0131 bile\u015fiklerle, i\u015flem s\u0131ras\u0131nda olu\u015fan veya eklenmi\u015f bile\u015fiklerin bir kar\u0131\u015f\u0131m\u0131d\u0131r. <a href=\"https:\/\/www.aluminiumceramicfiber.com\/tr\/bayer-process-for-aluminum-extraction\/\">Bayer y\u00f6ntemi<\/a>\u00a0d\u00f6ng\u00fcs\u00fc. Kat\u0131 madde konsantrasyonu 25-55 % aral\u0131\u011f\u0131nda (y\u00fcksek kostik i\u00e7eren su i\u00e7eri\u011fi), pH de\u011feri 13 aral\u0131\u011f\u0131nda ve y\u00fcksek iyonik mukavemete sahip bir \u00e7amur olarak bertaraf edilir. K\u0131rm\u0131z\u0131 \u00c7amur ayr\u0131ca silika, al\u00fcmina, demir, kalsiyum, titanyum oksitler gibi \u00e7\u00f6z\u00fcnmeyen kimyasallar\u0131n yan\u0131 s\u0131ra bir\u00e7ok di\u011fer min\u00f6r ve nadir toprak bile\u015fi\u011fi i\u00e7erir.<\/p>\n<p>K\u0131rm\u0131z\u0131 \u00e7amurun bertaraf\u0131, al\u00fcmina ve al\u00fcminyum \u00fcreten \u00fclkelerin tamam\u0131nda h\u00e2l\u00e2 bir \u00e7evre sorunu olarak g\u00fcndemde yer almaktad\u0131r. Di\u011fer proses kal\u0131nt\u0131lar\u0131 (kostik soda, kire\u00e7 vb.) ve safs\u0131zl\u0131klar da eklendi\u011finde, s\u00fcrekli olarak \u00fcretilen k\u0131rm\u0131z\u0131 \u00e7amur miktar\u0131, her ton al\u00fcmina ba\u015f\u0131na yakla\u015f\u0131k 2-2,5 ton ve \u00fcretilen her ton al\u00fcminyum metal i\u00e7in bu miktar\u0131n iki kat\u0131d\u0131r. Dolay\u0131s\u0131yla, y\u0131ll\u0131k 3 milyon ton kapasiteli bir al\u00fcmina rafinerisi, y\u0131lda 6-7 milyon ton k\u0131rm\u0131z\u0131 \u00e7amur \u00fcretir ve ortalama 50 y\u0131ll\u0131k \u00f6mr\u00fc boyunca bu \u00e7evreye zararl\u0131 maddeden yakla\u015f\u0131k 300-350 milyon ton \u00fcretir.<\/p>\n<p>K\u0131rm\u0131z\u0131 \u00e7amurun bertaraf\u0131nda en yayg\u0131n y\u00f6ntem, onu g\u00fcvenli, b\u00fcy\u00fck, i\u00e7 kesimlerdeki yapay havuzlara bo\u015faltmakt\u0131r; bu y\u00f6ntem, \u201cKapal\u0131 D\u00f6ng\u00fc Bertaraf Sistemi\u201d olarak bilinir. Y\u00fcksek alkali i\u00e7eri\u011fine sahip k\u0131rm\u0131z\u0131 \u00e7amur oldu\u011fu gibi karaya at\u0131l\u0131rsa veya s\u0131z\u0131nt\u0131, k\u0131y\u0131lardaki heyelan ya da \u015fiddetli tropikal ya\u011fmurlar nedeniyle bertaraf havuzlar\u0131ndan s\u0131z\u0131nt\u0131 suyu ta\u015farsa, su k\u00fctlelerine, otlaklara ve bitki \u00f6rt\u00fcs\u00fcne ciddi zararlar verilebilir.<\/p>\n<p>K\u0131rm\u0131z\u0131 \u00e7amurun tekrar tekrar y\u0131kan\u0131p s\u00fcz\u00fclmesi, s\u0131v\u0131n\u0131n buharla\u015ft\u0131r\u0131lmas\u0131 ve taban\u0131nda 300-400 mm kal\u0131nl\u0131\u011fa kadar kil yataklar\u0131 kullan\u0131ld\u0131ktan sonra yo\u011funla\u015ft\u0131r\u0131lm\u0131\u015f \u00e7amurun ayn\u0131 havuza geri konulmas\u0131yla bu sorun en aza indirilebilir; g\u00fcn\u00fcm\u00fcz\u00fcn modern al\u00fcmina rafinerilerinin \u00e7o\u011fu bu s\u00fcreci benimsemi\u015ftir. Yine de, \u015fiddetli muson ya\u011fmurlar\u0131 s\u0131ras\u0131nda \u00e7amurun ta\u015fmas\u0131 ve zehirli maddelerle \u00e7evreye zarar vermesi nedeniyle k\u0131rm\u0131z\u0131 \u00e7amur havuzlar\u0131 bir tehdit olu\u015fturmaktad\u0131r.<\/p>\n<h2><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3895\" src=\"https:\/\/aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/06\/Alumina-Refining-1.jpg\" alt=\"Al\u00fcmina Ar\u0131tma\" width=\"400\" height=\"320\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/06\/Alumina-Refining-1.jpg 400w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/06\/Alumina-Refining-1-300x240.jpg 300w\" sizes=\"auto, (max-width: 400px) 100vw, 400px\" \/><\/h2>\n<p>Al\u00fcmina ar\u0131t\u0131m\u0131nda bir di\u011fer \u00f6nemli ve s\u0131n\u0131rlay\u0131c\u0131 sorun, b\u00fcy\u00fck k\u0131rm\u0131z\u0131 \u00e7amur bertaraf tesisleri in\u015fa etmek i\u00e7in gerekli arazinin bulunmamas\u0131 olmu\u015ftur. Eski bir \u2018genel kural\u2019a g\u00f6re, y\u0131ll\u0131k 1 milyon ton kapasiteli bir tesisin 5 y\u0131l boyunca i\u015fletilmesi sonucunda 1 km\u00b2\u2019lik arazi kal\u0131c\u0131 olarak kaybedilmektedir. Bu sorun, modern tesislerde kullan\u0131lan yo\u011funla\u015ft\u0131r\u0131lm\u0131\u015f \u00e7amur bertaraf sistemi sayesinde bir dereceye kadar kontrol alt\u0131na al\u0131nm\u0131\u015f olsa da, n\u00fcfus yo\u011funlu\u011fu y\u00fcksek b\u00f6lgelerde ve i\u00e7 kesimlerdeki al\u00fcmina rafinerilerinin tasar\u0131m\u0131nda h\u00e2l\u00e2 ciddi bir sorun olmaya devam etmektedir.<\/p>\n<p>Son zamanlarda yap\u0131lan ara\u015ft\u0131rmalar, k\u0131rm\u0131z\u0131 \u00e7amurun i\u00e7erdi\u011fi kostik soda maddesinin on y\u0131llar boyunca kil ile reaksiyona girdi\u011fini ve sonunda karma\u015f\u0131k bir reaksiyon mekanizmas\u0131 yoluyla zeolitlerin olu\u015ftu\u011funu ortaya koymu\u015ftur; bu durum, terk edilmi\u015f k\u0131rm\u0131z\u0131 \u00e7amur havuzlar\u0131n\u0131n setlerini ve \u00e7evresindeki su sistemini nihayetinde tahrip edebilir. Bu durum, terk edilmi\u015f k\u0131rm\u0131z\u0131 \u00e7amur havuzlar\u0131n\u0131n 50 y\u0131l\u0131 a\u015fk\u0131n s\u00fcredir var oldu\u011fu eski al\u00fcmina rafinerileri i\u00e7in ciddi bir endi\u015fe kayna\u011f\u0131 olu\u015fturmu\u015ftur.<\/p>\n<h2><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-3896\" src=\"https:\/\/aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/06\/Alumina-Refining.jpg\" alt=\"Al\u00fcmina Ar\u0131tma\" width=\"500\" height=\"400\" srcset=\"https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/06\/Alumina-Refining.jpg 500w, https:\/\/www.aluminiumceramicfiber.com\/wp-content\/uploads\/2020\/06\/Alumina-Refining-300x240.jpg 300w\" sizes=\"auto, (max-width: 500px) 100vw, 500px\" \/><\/h2>\n<p>K\u0131rm\u0131z\u0131 \u00e7amurun bertaraf\u0131na y\u00f6nelik bir ba\u015fka y\u00f6ntem de \u201cDenize Do\u011frudan Bertaraf\u201dd\u0131r; bu s\u00fcre\u00e7te deniz suyu, k\u0131rm\u0131z\u0131 \u00e7amurun kostik etkisini seyreltip n\u00f6tralize eder ve deniz suyuna sal\u0131nan demir oksit, deniz ya\u015fam\u0131ndaki yosunlar, mercanlar ve di\u011fer s\u00fcr\u00fcnen canl\u0131lar\u0131n daha h\u0131zl\u0131 b\u00fcy\u00fcmesine yard\u0131mc\u0131 olur. D\u00fcnyadaki k\u0131y\u0131 \u015feridinde yer alan bir\u00e7ok al\u00fcmina rafinerisi, \u00e7evrecilerin zaman zaman g\u00f6sterdi\u011fi tepkilere ra\u011fmen bu t\u00fcr k\u0131rm\u0131z\u0131 \u00e7amur bertaraf sistemini uygulamaya devam etmektedir. \u0130lgin\u00e7 bir \u015fekilde, bu bertaraf sisteminin en b\u00fcy\u00fck destek\u00e7ileri b\u00f6lgedeki bal\u0131k\u00e7\u0131lard\u0131r.<\/p>\n<p>\u00dc\u00e7\u00fcnc\u00fc ve geli\u015ftirilmi\u015f \u00e7\u00f6z\u00fcm, \u0131slak \u00e7amurun birka\u00e7 a\u015famal\u0131 filtreleme i\u015fleminden ge\u00e7irilerek suyun ayr\u0131\u015ft\u0131r\u0131ld\u0131\u011f\u0131 Kuru Bertaraf Y\u00f6ntemidir. Bundan sonra, kuru \u00e7amur piramitler halinde bertaraf edilir veya havuz kenar\u0131na d\u00f6k\u00fcl\u00fcr. Kuru \u00e7amur pamuklu toprakla \u00f6rt\u00fcl\u00fcr ve metalik tozun havay\u0131, canl\u0131lar\u0131 ve etraftaki bitkileri kirletmesini \u00f6nlemek i\u00e7in d\u00fczenli olarak su serpilmesi gerekir.<\/p>\n<p>Ayr\u0131ca, k\u0131rm\u0131z\u0131 \u00e7amurun ferritik \u00e7imentolar\u0131n \u00fcretiminde ve demir \u00e7\u0131kar\u0131m\u0131nda toplu olarak kullan\u0131lmas\u0131na y\u00f6nelik giri\u015fimler de s\u00fcrmektedir; bu giri\u015fimler sayesinde at\u0131\u011f\u0131n daha verimli bir \u015fekilde de\u011ferlendirilmesi hedeflenmektedir.<\/p>\n<p>Bu nedenle, k\u0131rm\u0131z\u0131 \u00e7amurun insan sa\u011fl\u0131\u011f\u0131 ve \u00e7evreye y\u00f6nelik potansiyel tehlikesi s\u0131n\u0131rl\u0131d\u0131r. K\u0131rm\u0131z\u0131 \u00e7amur, \u00f6ncelikle y\u00fcksek alkali i\u00e7eri\u011fi ve a\u011f\u0131r metallerin varl\u0131\u011f\u0131 nedeniyle toksik olarak kabul edilmektedir.<\/p>","protected":false},"excerpt":{"rendered":"<p>The global primary Aluminium industry has been constantly reeling under pressure with accusations of environmental pollution and carbon emission. At every stage of aluminum production, starting from open cast Bauxite mining to caustic soda leach Bayer\u2019s Alumina refining process to the fluoride fused salt electrolytic process of aluminium smelting; there are a large number of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3896,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[86],"tags":[1312],"class_list":["post-1316","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","tag-alumina-refining"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Alumina Refining of Bayer Process | Aluminium Producing<\/title>\n<meta name=\"description\" content=\"At every stage of aluminum production, starting from open cast Bauxite mining to caustic soda leach Bayer\u2019s Alumina refining process...\" 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