The melting of aluminum scrap and dross provides many challenges to the secondary aluminum industry. Control of organic emissions and optimizing salt-flux use are two examples. Scrap raw materials contain organic components such as lacquer and oils. These generate emissions that may negatively affect productivity and the environment. This has limited the amount of organic components that can be allowed in the charge. The new Wastox, process uses controlled oxygen lancing and oxy-fuel burner management for combustion of emissions in the rotary furnace. Flue-gas composition is used for on-line process control. Use of the Wastox process has shown that the process allows the use of scrap with higher levels of organic contamination and that process economy and productivity is improved. By reducing or eliminating the amount of salt fluxes in the rotary furnace melting process, productivity, efficiency and environmental performance is improved. The new Universal Rotary Tiltable Furnace (URTF) is designed using the latest know-how from low-salt and salt-free melting of secondary aluminum.
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