Populated Circuit Board Scrap
If you wish to Buy or Sell scrap
Populated Circuit Boards
please ADD your inquiry to the Electronics Exchange.
Depopulation Theory
A simplified overview of this approach of totally Depopulating Circuit Boards by liberating all of the components
from the surface or that are embedded on the board.
This method acts as an alternative to the inefficient legacy cherry picking salvage method, that culls the
desired components and discarding the balance of the materials.
Changing environmental sustainability attitudes focus on the need to take a more responsible approach
to end of life management of electronic wastes.
Depopulation of circuit boards is one step to capture all of the materials contain in the PCB e-waste
which achieves a two fold positive outcome.
First of all the total wholistic approach of depopulation prevents the release of potentially toxic elements into the wild
and equally important allows for the recovery of valuable
strategic finite resources.
Both manually or automated dismantled components are acceptable.
Automated Depopulation
A small scale stand alone portable decentralized system, that can be located at any recycling operation,
where you simply feed an automated continuos stream of Populated Circuit Board scrap in the front end of the
solder recovery system that accumulates remelted solder
and you collect two separated streams of materials out the back end,
depopulated boards and liberated electronic components.
Solder Recovery
Bulk desoldering, sweat the solder off of the populated circuit boards by raising the temperature in a
controlled module with a controlled free flow of oxygen chamber
exploitation and fire suppression design vapor emission capture
melts the solder away from the board.
If you wish to recycle
Recovered Solder Remelt
Please feel free to ADD your inquiry into the online exchange.
Recovered Solder Remelt
Collection of the
tin/lead solder
from older boards and lead free solder from current EOL boards that
pools and solidifies at the bottom of the sweat chamber.
Mixed Recovered Electronic Components
Depopulating circuit boards results in the opportunity to capture
Liberated Electronic Components.
Mixed Recovered Electronic Components include a wide variety of items :
IC chips or Integrated Circuit, Resistors, Capacitors, Transistors, Inductors, Diodes, Fuse, Relays and Switches,
Oscillator, Connectors, Ceramic Resonators, and Transformers, just to name a few.
Processing
the Mixed Recovered Electronic Components into
Granulated Residue Nuggets
that become a refinery feed stock that can capture the values on a recovery basis.
Component Processing
Strategic Rare & Precious Residues are derived from raw
electronic components
recovered from
dismantling or de-populating printed circuit boards that have been
shredded, ground or milled into a uniform
free flowing particle
size and that have been magnetically separated to remove any steel content.
Further segregation is an option with the use of screening, gravity separation,
optical or electromagnetic detection and sorting,
but the preferred default comprehensive method is refinery recovery in order to extract
maximum value for ALL
the elements contained.
Granulated Residue Nuggets
Granulated Residue Nuggets are a premium synthetic ore that contain
strategic Rare & Precious Residues derived from raw electronic components recovered from
dismantling or de-populating printed circuit boards.
This is a material that has been shredded, ground or milled into a uniform free flowing particle size
and that has been magnetically separated to remove any steel content.
Ideal for
further processing
on a recovery basis as a refinery
residue
feed stock.
If you wish to directly Buy or Sell
Granulated Residue Nuggets
please feel free to ADD your inquiry to the on-line exchange.
There are a wide spectrum of materials contained in Mixed Recovered Electronic Components
including strategic Rare & Precious elements such as Gold, Silver, Platinum, Palladium, Ruthenium,
Tantalum and a range of common base materials like Aluminum, Copper, Tin and more.
DePopulated Boards
DePopulated Circuit Board Scrap are typically base metals, most commonly copper laminated on a
fiberglass
substrate.
If you wish to recycle
DePopulated Circuit Board Scrap
or sheared flush boards, Please feel free to ADD your inquiry to the Electronics Exchange.
Naked Circuit Board Scrap Recovery
Once the populated circuit boards are
DeSoldered
(Tin alloys removed)
and all the mixed components have been liberated or
DePopulated
you are left with copper laminated on a
fiberglass
substrate.
One processing option is Thermochemical solvolysis
Resin Recovery, an other option is
Standard thermal reduction that will yield a
Mixed Hydrocarbon
Fraction, a Copper Metal fraction and a Mineral Glass Fraction that may be formed into
Remelted Glass
chicklettes.
An alternative processing option for processing the Naked Circuit Boards is the method of full pyrolysis.
Once the populated circuit boards are DeSoldered and DePopulated the flat naked boards may be chipped
into a uniform size for material handling purposes.
The uniform chips may be fully thermally decomposed,
vaporizing the hydrocarbon based resins that are sent into the
Hot Gas
Refining unit.
The
solid residue
fraction contains the remaining metals and glass. The metals consisting mainly of copper are sent
for further upgrading and
metal refining.
The remaining glass fraction may become
feedstock
for manufacturing glass products or may be further upgraded and
processed into Recovered
Silicon
Powders.
