Answer:
Primary Metallurgy is the science of extraction of metals from ores & minerals. If there are more than one ways of extracting a metal from its ore or mineral, then the process which gives a more pure form of metal will belong to the category of primary metallurgy & the other processes will belong to the category of secondary metallurgy.
e.g. in case of iron making the blast furnace process is a primary metallurgical process whereas other processes of iron making i.e sponge iron or HBI making will belong to yhe category of secondary metallurgy,
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