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Question
Explain the difference between leaching and levigation.
Distinguish Between
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Solution
| Points | Leaching | Levigation |
| Nature of Method: | It is chemical method. | It is physical (mechanical) method. |
| Principle: | Ore is soluble in a suitable reagent, impurities are not. | It is based on difference in specific gravity between ore and impurities. |
| Process: | Ore is treated with a suitable chemical reagent, ore dissolves; impurities remain undissolved and removed by filtration. | Powdered ore is washed with a current of water; lighter impurities are washed away. |
| Application: | It is used for concentration of ores like aluminum, silver, gold. | It is used mainly for oxide ores. |
| Outcome: | It produces a solution of the ore which is then precipitated to get concentrated ore. | Impurities are removed by washing, concentrating the ore physically. |
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