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The dust produced from electric furnaces in steel making procedure is directly thrown out to the atmosphere via chimney.

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in Casting-Forming-Welding II by (119k points)
The dust produced from electric furnaces in steel making procedure is directly thrown out to the atmosphere via chimney.

(a) True

(b) False

The question was asked by my college director while I was bunking the class.

This interesting question is from Melting of Steel and Stainless Steel in chapter Foundry Introduction & Materials of Casting-Forming-Welding II

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The correct answer is (b) False

For explanation I would say: In steel making, dust is produced in the electric furnace during melting of steel. The produced dust is carried away in the off-gases which basically contains iron and some non-ferrous materials like zinc and lead. So not only environmental considerations but also for the economic considerations, the dusts are collected and recovery of valuable materials is done.

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