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How much steel scrap is present in refined irons?

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in Casting-Forming-Welding II by (119k points)
How much steel scrap is present in refined irons?

(a) More than 25%

(b) More than 60%

(c) More than 50%

(d) More than 95%

The question was posed to me in class test.

Question is from Cupola Charge Calculations topic in division Metal Furnace and Practice of Casting-Forming-Welding II

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The correct answer is (c) More than 50%

For explanation: Refined irons are considered to be the second best source of high carbon material. The steel scrap which is present in refined irons is a little more than 50%.

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