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首页> 外文期刊>International journal of sustainable engineering >Study of fluxing in Al refining process by rotary and crucible furnaces
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Study of fluxing in Al refining process by rotary and crucible furnaces

机译：转炉和坩埚炉精炼铝中助熔剂的研究

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摘要

The process used to obtain recycled Al alloys depends on the scrap quality. Rotary furnaces are normally used in Europe as they allow a great productivity and they can process low quality scrap using a salt flux to protect the molten metal from oxidation. In this article, the effect of the quantity of salt on the metal recovery has been experimentally investigated by melting several types of scrap under a mixture of NaCI-KCI-Na_3AIF_6 salts. The quantity of salt has been related to the salt factor (SF), which is the ratio between the non-metallic content in the scrap and the quantity of salt required. The same levels of salt factor have been tested by melting the scrap in rotary and crucible furnaces. The metal recovery increases with the salt content for both furnaces. The results obtained with the different melting processes are comparable because the yield difference is similar considering different salt factors. Crucible furnace gives greater metal recovery but it cannot replace rotary furnace in AI refining industry due to lower melting capacity. However, the results highlight that the optimisation of the AI refining process can be supported by preliminary tests through crucible furnaces reducing the time and material consumptions.
机译：获得再生铝合金的过程取决于废料质量。旋转炉通常在欧洲使用，因为它们具有很高的生产率，并且可以使用盐熔剂处理低质量的废料，以保护熔融金属免受氧化。在本文中，已通过在NaCl-KCI-Na_3AIF_6盐的混合物下熔化几种废料来实验研究了盐量对金属回收率的影响。盐的量与盐因子（SF）有关，盐因数是废料中非金属含量与所需盐量之间的比率。通过在旋转炉和坩埚炉中熔化废料，已经测试了相同水平的盐分系数。两个熔炉的金属回收率均随盐含量的增加而增加。由于考虑到不同的盐分因素，收率差异相似，因此采用不同的熔融工艺获得的结果具有可比性。坩埚炉可提高金属回收率，但由于熔化能力较低，因此无法替代AI精炼行业中的旋转炉。但是，结果表明，可以通过坩埚炉的初步测试来支持AI精炼工艺的优化，从而减少时间和材料消耗。

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