Magnetic filtering through a kinked duct
It is important to know how, where and
when hump magnets are best used. I'll explain the attributes of this kind
of separating magnet and I'll show you when it's best applicable.
How does a hump magnet work?
A hump magnet consists of a vertical,
kinked pipe, a funnel and two plate
magnets. Material can be fed through a funnel on top of the
magnet, through which it travels downward through a pipe. The duct or
pipe has two kinks in the middle, so that the material flows
vertically passed this crooked angle. There are two opposite plate
magnets built in the kinks, so that material
flows bounces of these plates, where ferromagnetic components are
attracted by the magnets and clean material drop further down. Should the material flow
passed the first magnet, there is another plate magnet on the
opposite kink, where the left-overs are caught. This results in a
clean and uncontaminated residue.
When and where is a hump magnet best used?
A hump magnet is ideal for ferrum
separation in a gravity system, where the flow line leads from top to
bottom. This magnetic separation machine is used for dry tramp metal
contamination in enclosed flow lines. The matter can be lumpy and hard to flow as well as free flowing
and grainy. It's best to use a half hump magnet when you are restricted by height and have a low throughput rate. If your throughput gets higher, it is also wise to implement a self-cleaning mechanism to increase efficiency. A half hump magnet – as the name
indicates – has just one kinked angle and is built for plant lines
with a height restriction. A double hump magnet is preferred when there
isn't a height restriction and when the throughput volume is high.
Because of the two kinks, the contaminants are either caught by the
first – or by the second plate magnet, which makes it very efficient.
In which specific sectors is the hump magnet best applied?
- Processing of edible material such as dairy, fertilizer and pharmaceuticals.
- The plastic and wood recycling industry. Used to sort metal particles from a stream.
- Also used in the textile industry to remove tramp metal.
- In the mining industry, it is also used to remove lumpy and ferromagnetic matter.
Which kinds of hump magnets are available on the market?
Manufacturers have designed the hump
magnet in such ways, that it plays into various customer needs and
different plant lines. The difference between the half hump magnet
and the double hump magnet is already explained above. However, there
tons of options available.
- Half hump - vs. Double hump - vs. Triple hump - vs. Round pipe hump magnet
- Self-clean vs. Manual clean
- Pneumatic suction vs. Gravity system
- Ceramic - vs. Rare earth magnet
Is it possible to adjust a hump magnet for my specific recycling factory?
I'd say that most recycling machine
manufacturers give you the possibility to build a machine within a
respectable range of sizes and options.
Here are some adjustable settings of
this type of machine:
- Magnet strength (measured in Tesla or Gauss)
- Material of the magnet (Neodymium, Cobalt, Ceramic, etc.)
- Manual cleaning or automatic cleaning option
- Design: single/double trap, pole face or suspended face
- 304-316 stainless steel casing or made from other alloys on demand
- Chute width
- 1 or more catchment strips for small particles (results in cleaner)
- Modified for use in the food and dairy industry
- Hinged plate magnets for cleaning on the outside.
- Pneumatic air flow
- Pneumatic self cleaning system
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