Herein, dross formation (D) in used beverage can (UBC) scrap bales was investigated in laboratory-scale experiments to understand the reactions of solid can coating residues with aluminum melts. The experimental conditions were chosen according to a multi-chamber furnaces process, in which thermal pretreatment and submerged melting of the scrap bales are combined. The thermal pretreatment results show that the supply of oxygen should be continuously adjusted to meet the oxygen demand of UBC scrap bales for thermolysis. Moreover, it is necessary to maintain the UBC scrap bales at an effective material temperature of 550–570°C for at least 30 min. It is shown that adhering carbon-containing pyrolysis char and oxidized can sheet surfaces decrease the coalescence of molten scrap, resulting in dross with a high metal fraction. Further melting experiments with UBC scrap bales of different densities (ρ) show that by lowering the ρ, the dross formation reduces.

中文翻译：

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饮料装料过程中铝熔体中的浮渣形成可以使用各种热预处理来报废不同密度的包

在本文中，在实验室规模的实验中研究了用过的饮料罐 (UBC) 废料包中的浮渣形成 (D)，以了解固体罐头涂层残留物与铝熔体的反应。根据多室炉工艺选择实验条件，其中结合了废钢包的热预处理和浸没熔化。热预处理结果表明，应不断调整供氧量以满足UBC废钢包热解的需氧量。此外，有必要将 UBC 废料包保持在 550-570°C 的有效材料温度下至少 30 分钟。结果表明，粘附的含碳热解焦炭和氧化罐板表面减少了熔融废料的聚结，导致金属含量高的渣滓。