{"id":7397,"date":"2020-10-14T07:30:46","date_gmt":"2020-10-14T07:30:46","guid":{"rendered":"http:\/\/www.adtechamm.com\/?p=7397"},"modified":"2020-10-14T07:30:46","modified_gmt":"2020-10-14T07:30:46","slug":"aluminium-degassing-unit","status":"publish","type":"post","link":"https:\/\/www.adtechamm.com\/id\/aluminium-degassing-unit\/","title":{"rendered":"Unit Penghilang Gas Aluminium"},"content":{"rendered":"

Unit Penghilang Gas Aluminium<\/strong> menghilangkan kotoran dari cairan logam untuk menghasilkan logam yang lebih bersih dan berkualitas lebih baik. Ini merupakan salah satu metode pembersihan yang paling umum dan efektif yang digunakan di bengkel pengecoran.<\/p>\n

Ada dua jenis utama pengotor yang ditemukan dalam aluminium cair: hidrogen terlarut dan zat padat<\/p>\n

Inklusi non-logam. Saat logam mendingin, hidrogen terlarut keluar dari larutan dan membentuk pori-pori yang merugikan. Porositas ini serta inklusi padat non-logam menurunkan kekuatan dan berdampak negatif terhadap kinerja akhir coran yang terbuat dari aluminium.<\/p>\n

\"Penghilang<\/p>\n

Pada aluminium, reaksi dengan uap air berlangsung sebagai berikut:<\/strong><\/p>\n

\u00b72 Al + 3 H\u2082O = Al\u2082O\u2083 + 3 H\u2082<\/p>\n

Hidrogen molekuler kemudian terdisosiasi dalam logam cair:<\/p>\n

\u00b73 H\u2082 = 6 jam<\/p>\n

Aluminium cair juga bereaksi dengan oksigen di atmosfer, sehingga selain reaksi oksidasi yang ditunjukkan pada persamaan (a), reaksi-reaksi berikut ini juga terjadi:<\/p>\n

\u00b74 Al + 3 O\u2082 = 2 Al\u2082O\u2083<\/p>\n

Reaksi ini menyebabkan terbentuknya lapisan oksida pada permukaan logam cair selama proses peleburan, serta pada setiap proses pemindahan logam cair selanjutnya.
\nOksida yang dihasilkan terperangkap dalam sebagian besar bahan cair tersebut dan kemudian berpindah ke hasil coran yang sudah jadi.
\nInklusi non-logam lainnya, seperti karbida, nitrida, atau borida, dapat berasal dari sumber-sumber seperti bahan wadah peleburan atau bahan tahan api lainnya.<\/p>\n

\"Unit<\/p>\n

Oleh karena itu,<\/strong> Unit Penghilang Gas Aluminium harus digunakan untuk menghilangkan hidrogen terlarut dan inklusi non-logam dari aluminium cair sebelum proses pengecoran guna mencapai kualitas terbaik.
\nProses-proses yang telah dikembangkan untuk membersihkan logam merupakan proses fisik yang melibatkan penggunaan aliran gas inert.
\nHidrogen yang terlarut dalam bahan cair berdifusi ke dalam gelembung-gelembung gas fluks yang naik dan dibawa ke permukaan bahan cair tersebut. Proses ini bergantung pada dua tahap utama:<\/p>\n

Laju difusi hidrogen melalui lapisan batas difusi ke dalam gelembung-gelembung inert
\nKonsentrasi hidrogen dalam gelembung inert
\nDifusi merupakan tahap penentuan laju pelepasan gas. Oleh karena itu, untuk mencapai efisiensi pelepasan gas yang optimal, persyaratan berikut harus dipenuhi:<\/p>\n

Gelembung-gelembung gas inert berukuran lebih kecil dan waktu tinggalnya di dalam logam cair lebih lama. Hal ini memastikan luas permukaan kontak yang besar antara gelembung-gelembung gas inert dan logam cair, sehingga menghasilkan koefisien perpindahan massa yang lebih tinggi dibandingkan dengan lapisan difusi.<\/p>\n

Hubungi sales@adtechamm.com untuk membeli Unit Penghilang Gas<\/a>.
\nJangkauan penyebaran gelembung inert di seluruh penampang logam cair sangat luas
\nGerakan menyeluruh dari bahan cair tersebut mempercepat perpindahan hidrogen ke gelembung-gelembung inert
\nPermukaan statis dari kolam cairan logam cair untuk mencegah penyerapan hidrogen baru akibat reaksi dengan atmosfer.<\/p>","protected":false},"excerpt":{"rendered":"

Aluminium Degassing Unit removes impurities from the melt to provide cleaner and better quality metals. It is one of the most common and effective cleaning methods used in foundries. There are two main types of impurities found in molten aluminum: dissolved hydrogen and solids Non-metallic…<\/p>","protected":false},"author":1,"featured_media":7398,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":[],"categories":[45391,52],"tags":[],"yoast_head":"\nAluminium Degassing Unit | Adtech China -sales@adtechamm.com<\/title>\n<meta name=\"description\" content=\"Aluminium Degassing Unit removes impurities from the melt to provide cleaner and better quality metals. 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