· The fine sand particles pass through the iron mesh and remain behind. (4) The method of sieving is also used to separate similar objects of different sizes. The cashew nuts of different sizes are separated in cashew nut factories by the process of sieving. Magnetic Separation . Magnetic separation means separation of a mixture by using a magnet.
The magnetic separation is a process in which magnetically susceptible material is extracted from a mixture using magnetic force. This is best way to separate the mixture of sand and iron fillings as iron is attracted by magnet.