MAGNETIC SEPARATION Group No.04 Muhammad Ashfaq MME-12-12 Muhammad Qaisar MME-12-10 Muhammad Ahmad MME-12-14 Anjum Shahzad Sanghi MME-12-16

INTRODUCTION

Magnetic separators are used to separate valuable minerals from non-magnetic gangue, e.g. magnetite from

quartz,

All materials are affected in some way when placed in a magnetic field.

Materials can be classified into two groups.1. Diamagnetic Materials 2. Paramagnetic Materials

Diamagnetic are repelled along the lines of magnetic force to a point where the field intensity is smaller.

Paramagnetic are attracted along the lines of magnetic force to points of greater field intensity.

Examples of paramagnetic are ilmenite (FeTiO3), pyrrhotite (FeS), and manganese minerals.

Some elements are themselves paramagnetic, such as Ni, Co, Mn , Cr and Pt.

APPLICATION OF MAGNETISM AS SEPARATOR

1. For the removal of tramp iron in coarse and

intermediate- crushing circuits, as a protection to the crushing machinery.

2. For the concentration of magnetite ores.3. For the concentration of iron ore other

than magnetite.4. For the removal of small quantities of iron

ore minerals from Ceramic raw materials.

ELEMENTS OF DESIGN OF MAGNETIC SEPARATORS

1. Production of suitably converging magnetic field.

2. Even feeding of ore particles as a stream or sheet.

3. Control of speed of passage of ore through the magnetic field.

4. Avoidance of non magnetic material between or within magnetic flux.

5. Provision of suitable means for disposing of separated products.

6. Provision for production of a middling.

CLASSIFICATION OF MAGNETIC SEPARATOR

It can be classified according to the medium in which the separation is made, the mode of the presentation of the feed, the mode of disposal of the products, & whether the magnets are stationary or moving.

IMPORTANT TYPES OF MAGNETIC SEPARATOR

1. EDISON SEPARATOR2. BALL NORTON SEPARATOR3. MAGNETIC DRUM SEPARATOR4. ROLLAR TYPE SEPATOR5. GRAVITY FEED MAGNETIC

SEPARATOR6. MAGNETIC COOLENT SEPARATOR7. WET DRUM SEPRATOR

EDISON SEPARATOREdison separator consists of

a bar magnet .

The ore as thin streams falls in front of the poles, susceptible particles being deflected inwards & non susceptible particles continuing to fall undeflected.

This separator was not wholly successful because of inability of control flow of solid in a thin sheet, & because of lack of control over the speed of the falling particles.

Magnetic drum separators are important magnetic separators that removes ferrous metal from dry bulk products in free-flowing processing systems.

They are self cleaning unit consisting of drums and housing normally of stainless steel.

The magnets used by the magnetic drum separators are either ceramic magnets or rare earth magnets.

How it Works?The processing materials enters the top of the magnetic drum separator and flows across the surface of the drum.

The rotatory drum in the magnetic field captures the ferrous tramps whereas non ferrous falls free from the drum into the cleaned material flow.

As the drum rotates, the ferrous metal so captured is carried past the diverter and released outside of the magnetic field.Wet drum separators is a type of Magnetic drum separators.

ApplicationsThe magnetic drum separator is ideal for separating iron particles from granules & powders It is widely used in the following industries: • Glass• Ceramic • Chemical • Fertilizer • Plastic

Ball Norton SeparatorUnlike most magnetic separators which are used to

remove relatively small amounts of metal, the Ball Norton Separator is designed to handle large amounts of ferrous material - removing other undesirable elements.

A unique combination of alternating magnetic poles and vibratory conveying works to clean the magnetic material. Applications include foundry shot, crushed borings, slag and magnetic ores.

How it Works? The material is discharge on the belt by the feeder. The magnetic roll is enveloped by the conveyor. The para and ferro magnetic ingredients remains stuck to the belt whereas non magnetic ingredients passes freely at the end of the conveyor.

Roller type magnetic separator is meant to separate ferrous contaminants from the flimsy magnetized dry granular metallic and nonmetallic materials.

Roller type magnetic separator has wide application in industries and mineral technology. The separator uses high powered rare earth magnets with very low dimensional tolerance.

The other components of the machine are conveyor and vibratory feeder. The magnetic rolls are available in different widths and magnetic strength

ApplicationsRoller type magnetic separator finds applications in the following areas like: • Glass industries• Abrasive refractory • Quartz cleaning • Upgrading of graphite • Recovery of metals from slag removal of ferro silicates • Chemical industries

Gravity feed magnets separates ferrous tramp metal through gravity system.

These magnets are constructed out of welded stainless steel and are available in stainless steel structure.

The gravity magnet comes in different shapes and sizes and are ideal for narrow chute applications.

Gravity feed magnets are normally used in vertical flow system.

ApplicationsGravity magnetic separators have different industrial and commercial usage. They are applied in industries like: • Food industry • Chemical industry • Grain processing industries Pharmaceutical industries

MAGNETIC COOLENT SEPARATORMagnetic coolant separator

is a device which cleans the coolant liquid of very fine ferrous particles.

It removes the iron chips from the liquid.

It is light and compact structure having strong magnetic power which can remove very fine ferrous particles.

For precise operations uninterrupted flow of oil is must. The coolant magnetic separator ensures the uninterrupted flow of the liquid.

WET DRUM SEPARATOR

Features Wet drum magnets have high magnetic

recovery and discharge. The feed slurries recover the magnetics. Available in single or multiple drum

applications. The magnet / pole elements are bolted to a

mild steel shaft. The drum is made from thick stainless steel for

long service life. Wet drum separators are available in different configuration like single drum,double drum and multiple drum. In double drum two separators are arranged back to back with a common feed back.

Applications

Glass industry Chemical industry Plastic industry Mining industry Food industry Pharmaceuticals industry Foundry industry

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