Smelt from a recovery boiler is processed in which tank?

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Multiple Choice

Smelt from a recovery boiler is processed in which tank?

Explanation:
In the Kraft chemical recovery cycle, molten smelt from the recovery boiler must be dissolved in water to form green liquor, which is then used in recausticizing to make white liquor. The vessel that performs this dissolution is the dissolving tank. There, hot, molten smelt is contacted with water, dissolving the sodium compounds (Na2S and Na2CO3) into an aqueous solution for downstream processing. The slag tank handles molten slag, the evaporating tank concentrates liquor by evaporation, and the neutralization tank adjusts pH or acidity in other process streams, not for dissolving the smelt.

In the Kraft chemical recovery cycle, molten smelt from the recovery boiler must be dissolved in water to form green liquor, which is then used in recausticizing to make white liquor. The vessel that performs this dissolution is the dissolving tank. There, hot, molten smelt is contacted with water, dissolving the sodium compounds (Na2S and Na2CO3) into an aqueous solution for downstream processing. The slag tank handles molten slag, the evaporating tank concentrates liquor by evaporation, and the neutralization tank adjusts pH or acidity in other process streams, not for dissolving the smelt.

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