Improving molds for electrofusion cast refractories

Conclusions

Great strength and adequate gas permeability are possessed by molding mixtures of quartz sand and also by a mixture of quartz sand and marshalite. These mixes possess high flowability, low friability and are easily molded.

Use of water glass for a bond reduces the drying time of the molds and confers excellent exploitation properties.

The quality of the working surface of the molds and their refractoriness can be increased by applying protective coatings.

Use of nonsplit-type molds gives better castings compared with products cast in split molds.