Thermal balance for the microwave drying of cores

Furnace type Foundry A Foundry B Foundry B Foundry C 

The data show that the drying time is considerably reduced from 1 - 2 h to less than 10 minutes. Additionally, the energy consumption is reduced by a factor of 4-5, and the throughput is increased. 

This technique is applicable for the drying of all water-based coatings. Furthermore, it allows the greater applicability of water-based coatings to more complex core shapes and smaller series. 

Microwave drying represents high investment costs. The actual investment is proportional to the power requirement, which corresponds to the amount of water to be evaporated. The high investment is partially counterbalanced by  

Pressure from authorities, with increasing attention being paid to the emissions of organics, combined with the need for higher energy efficiency. 

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Figure 4.8 Thermal balance for the microwave drying of cores for a 50 kW furnace working at 50 % capacity [143, Inasmet and CTIF, 2002]...

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