Question

What is the composition of green sand in the green-sand molding process?

Answer 1

Green sand consists of high-quality silica sand, about 10 percent bentonite clay (as the binder), 2 to 5 percent water and about 5 percent sea coal (acarbonaceous mold additive to improve casting finish). The type of metal being cast determines which additives and what gradation of sand is used.

Answer 2

Answer:

Green sand is made out of high-quality silica sand, around 10% bentonite clay (to act as a binder), 2 to 5% water, and about 5% sea coal (a carbonaceous mould additive to improve casting finish). Which additives and sand grades are utilised depends on the type of metal being cast.

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