The role of a neutral flux in pyrometallurgical extraction is to enhance the _____________ of the resulting slag?
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Answer: A. Fluidity
Explanation
Neutral fluxes are added to pyrometallurgical charges to adjust and enhance slag fluidity. Optimal slag fluidity ensures effective separation between molten metal and slag phases. Viscous slags trap valuable metal droplets, reducing extraction efficiency in smelting furnaces. Pyrometallurgy involves high temperature thermal extraction and purification of metal ores. Slag is a molten mixture of oxides formed during smelting to remove unwanted gangue minerals. Fluxes are chemical additives used to lower melting points and modify slag viscosity.
Copper and iron smelting operations monitor slag chemistry continuously to maintain high fluidity. Blast furnace operators add specific fluxes to ensure smooth tapping of liquid metal products. Efficient slag fluidity prevents furnace blockages and reduces metal losses in industrial waste. Option B basicity is adjusted using basic fluxes rather than neutral flux additives. Option C acidity is controlled by adding basic or acidic oxides, not neutral components. Option D is wrong because fluxes act to decrease viscosity and increase slag fluidity.
- Subject
- Engineering
- Category
- Chemical Engineering
- Topic
- —
- Difficulty
- medium
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