how are metals extracted from ores?
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Answered by
6
It depends upon their reactivity.
For a highly reactive metal, we use the process of electrolysis of molten ore to convert it into a pure Metal. For moderately reactive metal, such as carbonate ore and sulphide ore. We use the process of Calculation and Roasting. Which will be converted into a metal oxide and with the reduction with carbon, after refining we can get a pure metal. For less reactive metal the process of roasting is used.
Hope it helps
For a highly reactive metal, we use the process of electrolysis of molten ore to convert it into a pure Metal. For moderately reactive metal, such as carbonate ore and sulphide ore. We use the process of Calculation and Roasting. Which will be converted into a metal oxide and with the reduction with carbon, after refining we can get a pure metal. For less reactive metal the process of roasting is used.
Hope it helps
Answered by
8
The process of extraction of metals differs from one another depending upon the state they're found in and the level of their reactivity.
Low reactivity metals (like mercury and copper)
They are often found in free state. They are also found in the combined states of sulphide or oxide ores.
Oxides of these metals can be reduced to metals by simply heating.
But sulphide ores are roasted ( metal sulphide heated in presence of oxygen) and converted into oxide of metal and further reduced into metal.
Middle reactivity metals ( like zinc and manganese)
They are usually present as sulphides or carbonates.
Sulphides can be roasted ( same as done in low reactivity)
Carbonate ores are decomposed by heating and are converted into metal oxide and further reduced ( metal oxide heated with coke) to metal.
High reactivity metals ( like sodium and calcium)
Since they are highly reactive hence cannot be obtained from their compounds by heating with carbon as they have more affinity for oxygen than carbon.
They can be obtained by electrolytic reduction.
They are obtained by the electrolysis of their molten chlorides. The metals are deposited at cathode whereas chlorine is liberated at the anode.
Hope it helps.
Thank you.
Low reactivity metals (like mercury and copper)
They are often found in free state. They are also found in the combined states of sulphide or oxide ores.
Oxides of these metals can be reduced to metals by simply heating.
But sulphide ores are roasted ( metal sulphide heated in presence of oxygen) and converted into oxide of metal and further reduced into metal.
Middle reactivity metals ( like zinc and manganese)
They are usually present as sulphides or carbonates.
Sulphides can be roasted ( same as done in low reactivity)
Carbonate ores are decomposed by heating and are converted into metal oxide and further reduced ( metal oxide heated with coke) to metal.
High reactivity metals ( like sodium and calcium)
Since they are highly reactive hence cannot be obtained from their compounds by heating with carbon as they have more affinity for oxygen than carbon.
They can be obtained by electrolytic reduction.
They are obtained by the electrolysis of their molten chlorides. The metals are deposited at cathode whereas chlorine is liberated at the anode.
Hope it helps.
Thank you.
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