Turn-Key PCB Processor

We have developed a processor built around our hammer mill and shaker table to completely pulverize printed circuit boards (PCB) and other electronic components to liberate the precious metals and base metals from the plastics and fibers.

The primary components of the PCB processor are:

  • Hammer mill
  • Shaker table
  • Hydrocyclone

If you have questions on which size equipment and accessories are right for your job, let us help. We’re here to answer any questions you may have.


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Overview

Product Description

Our turnkey system for printed circuit board (PCB) processing liberates precious metals and base metals from the plastics and fibers of consumer electronics and other components, avoiding the use of chemicals for leaching. Using a hammer mill, shaker table, and hydrocyclone, our turnkey system pulverizes the components, separates lighter waste from denser metals, and recirculates pieces back for additional pulverization and separation.

The primary components of the PCB processor are:

  • Hammer mill – This machine breaks up the PCBs and components to about <1/8” pieces, and discharges them onto the shaker table.
  • Shaker table – This separates materials based on density (specific gravity).  The metals in PCBs are all higher density than the waste material, so behave differently on the table, allowing density separation of metals and plastic/fiber waste. The metals are transported across the table in grooves and removed from the table (ports #1, 2 and 3), while the waste material and not-fully-pulverized PCB pieces flow down the table to the waste-and-regrind discharge port #4 on the table.  From here the wet slurry is pumped to the hydrocyclone.
  • Hydrocyclone – The wet slurry is pumped into the bottom of the hydrocyclone in a tangential flow.  The lightest waste material rises with the water flow and discharges out of a center stand pipe to the waste/settling pond.

Uses

Uses

The larger and denser material sinks to the bottom of the hydrocyclone and is fed back into the hammer mill again for further grinding.  The regrind cycle is repeated until the particles are pulverized small enough to discharge to the waste/settling pond.

The hammer mill and shaker table have had little modification from those used for ore.  However, perfecting the hydrocyclone was the biggest challenge.  The flow rate, diameter and inlet/outlet locations had to be tuned for satisfactory performance.  After testing multiple designs, we have increased the recovery of gold and silver to 85-90%, and copper and most base metals to >95%.


Here are some links to some related YouTube videos that you may also find interesting gold recovery from IC chips: