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Chapter 1 - Transition Elements and Iron Metallurgy

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Lesson 3: Iron Ore Extraction, Reduction Furnaces and Alloy Classifications — Picture questions (exam style)

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1.
10 t of Fe₃O₄ ore (80% pure) goes into the blast furnace with 85% reduction efficiency; all the iron becomes steel with 1.0% carbon. Which option is correct? (Fe = 56, O = 16, C = 12)
10 t of Fe₃O₄ ore (80% pure) goes into the blast furnace with 85% reduction efficiency; all the iron becomes steel with 1.0% carbon. Which option is correct? (Fe = 56, O = 16, C = 12)
iron produced = 4.92 t, steel (C = 1.0%) possible = 4.97 t
iron produced = 1.93 t, steel (C = 1.0%) possible = 4.92 t
iron produced = 7.24 t, steel (C = 1.0%) possible = 9.85 t
iron produced = 5.79 t, steel (C = 1.0%) possible = 4.97 t
2.
Which statement about extracting iron in the furnace shown is NOT correct?
Which statement about extracting iron in the furnace shown is NOT correct?
limestone decomposes and forms calcium silicate slag
molten iron floats on the slag
carbon monoxide is the main reducing agent
roasting removes moisture and oxidises impurities
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