Question

Why are concentrated ores are converted into corresponding Oxides before reduction

Answer 1

• It is easier to obtain metals from their oxides (by reduction) than from carbonates or sulphides.

• So before reduction can be done, the ore isconverted into metal oxide. Theconcentrated ores can be converted intometal oxide by calcination or roasting.

• The concentrated ore must be converted into a form which is suitable for reduction.

• Usually the sulphide ore is converted to oxide before reduction.

• Oxides are easier to reduce.

• Thus isolation of metals from concentrated ore involves two major steps viz.,
• (a) conversion to oxide,

• and

• (b) reduction of the oxide to metal.