Purification Technology by Online Degassing and Filtering

Due to the limited development of furnace treatment and purification technology, the major research and development objects of major aluminum processing and casting companies in the world are the technology of melting the melt outside the furnace. The main development direction is to continuously improve the purity of the melt and continuously pursue high efficiency and low price. AdTech’s online degassing unit and CFF filtering unit can meet the development needs of aluminum purification technology.

On-line degassing is the key research and development object of aluminum enterprises’ melting and casting production, and there are many types. The rotating nozzle degassing method is widely used, stable, effective and reliable for degassing, such as the SNIF degassing device in the United States, the ALPR degassing device in France, and the AdTech online degassing unit in China. These degassing methods all use nitrogen or As a refining gas, argon can not only effectively remove the hydrogen in the aluminum melt, but also remove the alkali metals or alkaline earth metals very well, and at the same time can improve the effect of slag-liquid separation.

Purification Technology

Improving the filtering effect and effectively removing non-metallic inclusions is the focus of the development of melt purification technology. The various filtering methods mentioned above are very effective filtering methods and have a good effect on improving the purity of the melt.

At present, there are many kinds of melt filtration methods studied in various countries, but the more researched is the ceramic foam filter plate. There are many new varieties of it. In order to improve the filtration accuracy, the hole of the filter plate has been developed from 50ppi to 60ppi. A composite filter plate appears, that is, the filter plate is divided into upper and lower layers. The pore size of the upper one inch is extremely large, and the pore size of the lower one inch is smaller. The varieties and specifications are 30/50, 30/60, 30/70pi, and the filtration efficiency of the composite filter plate higher.

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