Question

ii. Why a small amount of coke is required in the smelting process? How is slag formed during smelting. ii. Why is lime added in the smalting​

Answer 1

Answer:

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Answer 2

Answer:

i. SMELTING

The roasted ore is mixed with coke and silica (sand) and is introduced in to a blast furnace. The hot air is blasted and FeO is converted in to ferrous silicate FeSiO  

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 (slag). Here, iron removed as slag.

ii. Lime is added to remove excess of Si02. Lime decomposes to form CaO, which reacts with sand to form slag. ... Smelting uses heat and a chemical reducing agent to decompose the ore, driving off other elements as gases or slag and leaving the metal base behind.

Explanation:

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