Total carbon emissions from various process steps, using aromatic- and vegetable-based solvents

Non-aromatic solvents can be applied in all processes using cold-box sand. The technique is relatively new and operational results as stated above need to be confirmed through repeated application. The technique has been implemented in foundries for the full range of automotive castings, as well as in castings for machinery, and in the construction and electronics industry. Both ferrous and non-ferrous applications are reported. 

Data from the Italian foundry association indicate that non-aromatic solvents have a cost that is double that of the aromatic equivalent, e.g. EUR 0.82/kg against EUR 0.36 - 0.48/kg. 

Operational data from a large series ferrous foundry showed that binder prices for aromatic cold box were around EUR 2/kg (2001) and went up with some 30 %, upon changing to the nonaromatic system. After one year (2003), the price lowered again however, to a level 10 % above the price of the traditional system. 

The technique is reported to be used in large-scale foundries in Germany. 

Alternative moulding/core-making methods Lost Foam casting 

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Figure 4.9 Total carbon emissions from various process steps, using aromatic- and vegetable-based solvents...

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