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____________ sand is highly used for investment casting process.

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in Foundry and Forging by (110k points)
____________ sand is highly used for investment casting process.

(a) Silica Sand

(b) Zircon

(c) Loam sand

(d) Chromite sand

I got this question in an interview for internship.

My enquiry is from Moulding Sand Binders and Additives topic in division Pattern Materials & Moulding Sand Tests of Foundry and Forging

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Best answer
Right answer is (b) Zircon

Best explanation: The Zircon sand has high thermal conductivity, high chilling power and high density. It requires a very small amount of binder. It is used to manufacture precision steel castings requiring better surface finish which is the main objective of the investment casting process.

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