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Impurity
Kettles

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Impurity Removal Kettles

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Description: Maintains molten tin at elevated temperatures, which allows impurities and oxides to react with added refining agents, forming slag or dross that can be physically separated from the purified molten tin, thereby enhancing its overall purity and quality.

 

Key Advantages:

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  • Much lower cost than sending crude Sn to reverb furnace

  • Higher Sn recovery

  • Less slag/dross

  • Low maintenance

 

Here's how impurity removal kettles fit into the refining process:

 

  1. Impurity Removal: Used after the electric arc furnace and before the continuous VDU or crystallizer to remove high impurities such as Cu, Ni, Sb, Fe from crude Sn.

  2. Refining Tin: When placed after the continuous VDU to remove low impurities.

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2-DBTM20型Sn精炼炉总装图TBK2.png

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1. Type: DBTM20 Impurity Removal Kettles  

  • Power load: 300KVA

  • Capacity: 10 MT feed/batch/x2

  • Feed: Crude Sn with Zn, Cu, Ni, Fe, As, Sb

  • Process: Process: Fe, As – Liquation & condensation. Cu, Ni with Sulphur. Rest with saw dust

  • Output: Crude Sn with Pb, Bi, Sb or pure Sn

  • Sn recovery rate: 80-95%

  • Dross: Liquation & condensation dross to liquation furnace. Other dross to electric or fuming furnace

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