In order to generate the necessary heat, most precious metal refineries use a powerful induction furnace. Learn how induction works by reading this presentation.

1. Induction Furnaces &
Precious Metal
Refining

2. Melting Precious Metals
Precious metal refining is hot work. Because of there
high melting points, precious metals can be
challenging to work with:
• Gold melting point: 1948 °F
• Silver melting point 1763 °F
• Palladium melting point: 2831 °F
• Platinum melting point: 3215 °F

3. Induction Heating
• In order to generate the
necessary heat, most
precious metal refineries use
a powerful induction
furnace.

4. Induction Science: A Brief
History
• English scientist Michael Faraday discovered
electromagnetic induction in 1831.
• Induction furnaces became popular near the end of
World War II.
• Induction furnaces were used to melt and weld weapon
parts faster, cheaper, and more precisely.
• After the war, they easily transferred into peacetime
applications – including precious metal refining.

5. How an Induction Furnace
Works
• Because they use electromagnetic induction, induction
furnaces require no combustible fuel and have no
emissions.
• The furnace itself is usually designed as a box built
around a transformer, with a hollow spot where
materials are heated.
• The hollow contains a coil of high conductivity copper
tubing that is magnetically shielded and water cooled.
• This copper tubing is responsible for controlling the heat
levels in the furnace.

6. How an Induction Furnace
Works
• Precious metals are placed within a
crucible, which is placed within the hollow
surrounded by the copper tubing.
• High-frequency AC electricity is passed
through an electromagnet and generated
in the precious metal.
• The metal’s resistance to the electric current
generates heat – the level of which can be
increased or decreased by changing the flow of
electricity.
• With induction heating, iron (melting point
2800 °F) can go from solid to liquid within
an hour.

7. Other Induction Advantages
• Induction furnaces are widely used throughout metallurgy
not just because of their efficient melting abilities, but also
because of their usefulness in forging new alloys.
• Because induction is a no-contact process that doesn’t
utilize combustion, induction furnaces can work in inert
atmospheres and vacuums – which is necessary when
creating alloys that oxidize if heated in the presence of air.
• As an additional benefit, the magnetic forces in an induction
furnace can be directed to stir the molten metal, which is
very useful for creating fully homogenized alloys.

8. About MGS
Manhattan Gold & Silver (MGS) is a precious metals refiner that has been based in
Manhattan’s historic Diamond District since 1985. We are a B2B company that
buys and recycles precious metal scraps that accumulate in other businesses.
We serve:
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Jewelers
Pawnbrokers
Dentists
The industrial sector
Antique dealers
Machinists
Domestic mining
And more!
• MGS also creates charts, calculators, and other online tools for our customers to
use.
• Try our Precious Metals Prices app, which lets you monitor the real-time precious metals
market situation from anywhere, right from your iPhone, iPad, or Android device.

9. Recycle your Precious
Metals for Profit
• MGS accepts gold, silver, platinum, and palladium.
• Payouts are based on the London Fixing.
• Up to 99% payout (among the highest in the US)
• Up to 98.5% for gold brought in for hand testing.
• Not in NYC? Ship us your precious metals using our Ship &
Sell service which offers:
• Same day wired payment (once lot is received)
• Discounted, insured shipping
• Payout calculator

10. Connect with MGS
• For amazing facts, history and news, read our gold and precious metals blog.
• Join the conversation about precious metals on the MGS page on Facebook.
• Follow gold, silver, and other precious metal trends at the MGS Twitter account.
• Circle MGS on Google+ to hear our latest updates.
• If you do business with us, connect with us on the MGS LinkedIn page.
• To see precious metal melting and refinement in action, visit the MGS YouTube
channel.