- Industrial Sand
- Silicosis Prevention
Industrial sand is an essential part of both the ferrous and non-ferrous foundry industry.
In fact, foundries are the second biggest consumers of silica; there are close to 3,000 foundries in the United States. Two-thirds of these foundries are located in Ohio, Indiana, Michigan, Illinois, and Wisconsin; which gives them easy access to the numerous industrial sand producers operating in the midwest.
Silica is essential for metal casting because of its invaluable qualities. When casting metal, silica's high fusion point (1760°C) and low rate of thermal expansion produce stable cores and molds compatible with all pouring temperatures and alloy systems. Even better, silica’s chemical purity helps prevent interaction with catalysts or curing rate of chemical binders. Silica allows all kinds of metal parts ranging from engine blocks to sink faucets to be cast in sand and clay molds to produce the external shape and a resin bonded core that creates the desired internal shape.
The silica required to cast metal must be of an extremely high-end quality (98% SiO2.), similar to glass making. The permeability of silica, what allows the gases to escape, and the margin of error for the selection of the sand is extremely tight: even 0.1 mm difference in sand diameter would greatly reduce performance. NISA members have long served as important partners with the metal casting industry by providing the high-quality silica necessary for the production process.