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Purification of Aluminum melt in Crucibles by Bubble Flotation

机译：泡沫浮选在坩埚中纯化铝熔化

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摘要

According to the principle of bubble floatation, purification of A356 aluminum casting alloy has been studied by purging nitrogen gas into the A356 alloy melt through a patented porous sprayer which is immerged in the molten aluminum and can generate a large quantity of dispersed micro bubbles to absorb the hydrogen and carry the nonmetallic inclusions in the melt to the surface of the melt. The experiments have been carried out in different capacity of crucibles for the assessment of the evaluation of effectiveness. 5 samples were taken at 0 min, 2 min, 4 min, 6 min, 8 min and 10 min, respectively, to measure the hydrogen content through HYSCAN Ⅱ hydrogen tester in the temperature of 720C. The experiments results show that the removing effects of hydrogen and oxide inclusion are remarkable. The hydrogen contents reach the minimum when purging lasts 10, 8 and 4 minutes for the 280kg, 160kg and 40kg, respectively. The inclusions are also removed along with the removal of hydrogen.
机译：根据泡泡浮选原理，通过通过专利的多孔喷雾器吹入A356合金熔体中，通过专利的多孔喷雾器吹入熔融铝中的净化，通过专利的多孔喷雾器来研究A356铝铸造合金的净化，可以产生大量分散的微气泡以吸收氢气并携带熔体中的非金属夹杂物到熔体表面。实验已经以不同的坩埚进行了分类，以评估有效性评估。分别在0分钟，2分钟，4分钟，6分钟，8分钟和10分钟，以720℃的温度下测量氢含量。实验结果表明，氢气和氧化物夹杂物的去除作用是显着的。当吹扫持续10,8和4分钟的280kg，160kg和40kg时，氢气含量达到最小值。夹杂物也随着氢的除去而被除去。

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