The influence of the charge mix on the yield and efficiency of a stack furnace has been analysed. The process yield has been calculated as the ratio between the weight of the tapped metal and the weight of the charge, while the efficiency has been assessed as the consumption of methane. The charge consisted of different amount of ingots and new scraps coming from the foundry process. The volume of slag produced through the melting process has been also considered. The results reveal that the addition of ingots in the charge decreases the amount of oxides and impurities in the molten metal and this brings many benefits. The yield and the metal quality increase while the amount of slag decreases. From the energetic point of view, the heat dispersion and the insulating effect of the oxide diminish, thus the methane consumption reduces.
Efficiency and yield evaluation of a stack furnace in high-pressure die-casting foundry
TIMELLI, GIULIO;CAPUZZI, STEFANO;
2016
Abstract
The influence of the charge mix on the yield and efficiency of a stack furnace has been analysed. The process yield has been calculated as the ratio between the weight of the tapped metal and the weight of the charge, while the efficiency has been assessed as the consumption of methane. The charge consisted of different amount of ingots and new scraps coming from the foundry process. The volume of slag produced through the melting process has been also considered. The results reveal that the addition of ingots in the charge decreases the amount of oxides and impurities in the molten metal and this brings many benefits. The yield and the metal quality increase while the amount of slag decreases. From the energetic point of view, the heat dispersion and the insulating effect of the oxide diminish, thus the methane consumption reduces.
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