How are Ferrous Metals and Non-Ferrous Metals separated in recycling plants?
Answers
Ferrous materials are the materials that contain iron while non-ferrous materials do not contain iron.
Non-ferrous materials are of low weight,have a high level of conductivity,not corroded easily and lack a magnetic property.
Basic metal sorting is used to separate the ferrous and non ferrous materials which entails the following;
1.Crushing of the scrap metal
This is done by passing the metals through machines that crush them in order to increase their surface area for efficient recycling.
An impact type crusher is used where the metal being crushed is very course.
2.Grinding the scrap metal
Crushing alone cannot generally reduce the metal =to the desired size,so i order to clean and free the metal from any other waste,its important to grind it in a grind mill.
3.Screening and classification.
The metal is then passed through a screen to make sure that the finished product is of high quality requiring no further treatment.
It also helps to isolate the smaller fractions of metals with the larger fractions.
There are there types of metal sensing which are. pyrometallurgy, hydrometallurgy, and biotechnology.
4.Jigging heavy metals.
The unclean,course and oversize product from the screen is then passes through a Improved Harz Type Jig,Then the clean metal product is removed through the jig side draw off sides and the waste is discharged over the end of the jig.
5.Tabling heavy scrap
This is where the amount of the metal not recoverable is tabled and this helps to pilot the efficiency of the machine.
The materials could then e returned back to the classifier.
6.Water reclamation and tailings disposal.
This is where the water used during the process is reclaimed on the disposables are disposed efficiently.