What is foundry sand?

Foundry sand is clean, uniform, high-quality silica sand used in foundry casting processes. Sand bonding to form moulds or patterns used for ferrous (iron and steel) and non-ferrous (copper, aluminium, brass) metal castings. Shake-out sand from finished metal casting is often recovered in the foundry sand process.

Where is silica sand found?
Commonly found in the crystalline state it also occurs in the amorphous form formed as a result of weathering or planktonic fossils. Silica sand deposits are generally surface-excavated in open pit operations, but are also used in excavation and underground mining.

Uses of Silica Sand
Silica sand is used in water purification and glass making, synthetic foundry moulding catalysts, disodium ultramarine etc. It is also used for acid heat resistant ceramics, refractories, pottery glaze, enamel etc. And glass and polished marble circular silica sand grains are used for sandblasting, as a filler in paints 'wood paste' moulded hard rubber materials, gypsum plasters, oxychloride acoustic plasters and soaps. For more details visit: https://www.buildersmart.in/blogs/silica-sand/