Self-Cleaning Magnetic Separator (SGA)

In brief

• The self-cleaning magnetic separator (SGA) retains ferromagnetic particles on a grate of magnetic bars through which the bulk materials flow.
• It is used in food processing, plastics, chemicals, pharmaceuticals and ceramics.
• A self-cleaning mechanism discharges the particles; of the 3 rows of bars, only one is cleaned at a time to ensure continuous filtration.

permanent magnet, Separator

• Fields of application
• Operating principles
• Operating recommendations
• General characteristics
• Case studies

Fields of application

Self-cleaning magnetic separators are used in various industries, including:

• Food processing: to remove metal contaminants from bulk products such as cereals, sugar or flour.
• Plastics: to purify plastic granules before processing.
• Chemicals: to remove ferrous particles from chemical powders and granules.
• Pharmaceuticals: to ensure the purity of drug ingredients.
• Ceramics: to remove ferrous impurities from raw materials.

Operating principles

Operating principle of the Lenoir-Mec self-cleaning magnetic separator:

• The bulk materials pass through a grate made up of powerful magnetic bars.
• Ferromagnetic particles are attracted and retained by the magnetic bars.
• Non-magnetic materials continue through the grate.
• A self-cleaning mechanism is activated periodically.
• This mechanism discharges the collected ferromagnetic particles into a collection bin or a chute.
• The bars are then automatically reinserted into the flow to carry out the separation.
• Of the 3 rows of bars, only one row is cleaned at a time to ensure continuous filtration

Operating recommendations

To optimise the efficiency of a self-cleaning magnetic separator, we recommend the following:

• Cleaning frequency: Adjust the frequency of the automatic cleaning cycle according to the quantity of metal contaminants in your materials.
• Material throughput: Adjust and spread the material flow to ensure optimal contact with the magnetic bars without overloading the system.
• Preventive maintenance: Regularly inspect the magnetic bars and the cleaning mechanism for any signs of saturation or wear.
• Temperature control: Monitor the operating temperature, as excessive temperatures can irreversibly degrade magnetic performance.
• Staff training: Make sure that operators fully understand how the system works and the associated safety procedures.

General characteristics

The self-cleaning magnetic separator has several distinctive characteristics:

• High efficiency: Effectively removes ferromagnetic particles, even very small ones (>60µm)
• Self-cleaning: Eliminates downtime and manual intervention.
• Continuous operation: Allows uninterrupted processing of materials, thereby increasing productivity.
• Adaptability: Available in different sizes and configurations to suit various industrial processes.
• Fault prediction: incorporates advanced features to facilitate fault diagnosis before failures occur.
• Improved safety: incorporates features to minimise handling.

Advantages

• Proven magnetic performance
• Self-cleaning
• Improved accessibility for quick maintenance

Services

• Industrial commissioning assistance
• Spare parts stock
• Fast after-sales service response
• Installed base monitoring and periodic performance checks

Frequently asked questions

In which industries is the SGA self-cleaning separator used?

It is used in food processing (cereals, sugar, flour), plastics processing (granules), chemicals (powders and granules), pharmaceuticals and ceramics. It removes ferrous particles from bulk products.

How does the SGA self-cleaning system work?

The materials pass through a grate of magnetic bars that retain the ferromagnetic particles. Periodically, a mechanism discharges these particles into a collection bin or a chute, then reinserts the bars into the flow.

Does the SGA operate continuously during cleaning?

Yes, of the 3 rows of bars, only one row is cleaned at a time to ensure continuous filtration. Self-cleaning eliminates downtime and manual intervention.

What particle size can the SGA remove?

It effectively removes ferromagnetic particles, even very small ones (larger than 60 µm). It is available in different sizes and configurations to suit industrial processes.

How can the use and maintenance of the SGA be optimised?

Adjust the cleaning cycle frequency according to the quantity of contaminants and set the throughput to avoid overloading. Regular inspection of the bars and the cleaning mechanism is recommended, as well as monitoring of the operating temperature.

Technical data

Model	Product passage (mm)	Weight (kg)	Length L (mm)	Width I (mm)	Volume flow (m³/h)*	Mass flow (t/h)*
SGA 250	250x250	75	857	471	35	30
SGA 300	300x300	87	943	520	50	40
SGA 350	350x350	109	1043	570	70	50
SGA 400	400x400	120	1143	620	90	70
SGA 450	450x450	141	1243	670	110	90
SGA 500	500x500	162	1343	720	135	110
SGA 550	550x550	182	1443	770	149	120
SGA 600	600x600	202	1543	820	163	130
SGA 700	700x700	242	1743	920	190	150