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Question

While your siblings are eagerly anticipating their first batches of Gold and diamond, you are still yet to get a single gram of copper! Armed with the know-how of extracting copper, you smelt the calcine from the roasting process in a blast furnace. What is the smelt composed of?


A

Pure Cu metal

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B

Crude Cu metal

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C

Cu2S and FeS

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D

Matte Copper

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Solution

The correct options are
C

Cu2S and FeS


D

Matte Copper


The roasted ore is mixed with Silica and powdered coke (to deter the oxidation of FeO to Fe2O3 so that FeO could be removed as FeSiO3)

FeO + SiO2 FeSiO3

The temperature is high enough to melt the slag. Below the layer of slag is molten mass known as Copper Matte. It consists of Cu2S and FeS


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