Large Gold Sluice
Large Gold Sluice Plans
The most common size of portable
gold sluices seems to be
three feet in length and one foot in
width. This is the best compromise
in fine gold recovery and
reasonable portability. This sluice
will handle an increase in
water flow due to taller 8 inch
side rails and in turn an increase in the
rate of processing of gold-bearing
material.
This sluice is based on the idea
of being simple in design and
methods of construction. No cutting
torch or arc welder involved; only
hand tools or lightweight
power tools. Since all of the
wood cuts are cross cuts, the only
large power tool I used is a
radial arm saw. If you don't have a
radial arm saw a hand saw,
circular saw or router can be used
to make the cuts and riffles.
For cutting carpet and ribbed
matting, a sharp utility knife
or heavy duty scissors works well.
Galvanized nails or deck screws
can be used to assembly the
pieces together but, since the wood
is relatively thin, predrill all
holes to reduce splitting. A
cordless drill with a quick-change bit
system is a real time saver on
this type of project.
The
first foot of
sluice is ribbed rubber matting, the second
foot is expanded metal grate on top
of carpet or miner's moss and the
third foot is riffles cut
into the wood.
A variation on the riffles
is to use wood or plastic quarter-round trim available at any home improvement store.
The expanded metal grate acts as a
method to hold the carpet
in place and the grate is held in
place by foot long clamps along
the bottom of the side rails.
The clamps are held in place by
machine screws that protrude
through the clamps and side rails
and are secured on the outside
of the side rails with wing nuts.
This setup provides for easy
disassembly and removal of the carpet
during cleanup. The clamps can be
made of wood, pvc or metal.
Also shown is a screen that fits
between the first two braces
and on top of the side rails.
This allows the prospector to
shovel directly into the sluice
and prescreen the gravel in one step.
Prescreening helps in the recovery
of gold by eliminating
large rocks that could tear up the
sluice and dislodge any gold
already recovered. The screen is
easily removed and dumped when
full. Have a great time and find
gold!
How
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