Many foundries already prosses or plan to apply DIN EN ISO 14001 Certification. This environmental managment system includes an obligation to reduce the pollution balance and sponso utilization of foundries wastes. Waste materials in the foundry industry include residual sands that can be used in applications such as excavation work and road construction. The requirements for such uses include a phenol index of 0.1 - 1 mg/L eluate determined as specified by the German LAGA ( Ländergemeinschaft Abfall or Interstate Waste community).

A new generation of Cold-Box systems has been developed to improve the situation with respect to phenol emissions after pouring and to improve the utilization of used sands coming from grey iron foundries.

In contrast to the other binder generations, whose benifits are solely attributable to changes in the solvents used in them, the reactive, i.e. resin component was modified in development of this generation. A marked reduction in the level of free phenol in the cold-Box resin could contribute to an improvement in the phenol index of the mouling sand.

Reduction of the phenol index in molding sand and recovered sand by use of a third-generation cold box system

Even the newer cold box systems of the first and second generations offer a considerable reduction in the pollutant emissions following pour-off. The new system tested in this case affords an even greater improvement in the industrial hygiene conditions at the casting line and after shakeout . In particular, the phenol emissions could be markedly decreased in this case.

Pollutant emissions at the casting line		Pollutant emissions at the shakeout grill

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