Product Description:
SOLD OUT - please see our other gold trap sluices below.

MADE IN THE USA! The new generation of fluid bed sluices is here - the Grizzly Gold Trap Sluice

NUGGET GOLD TRAP FLUID BED SLUICE

At approx. 26 inches long and only 4.5 lbs, the Nugget model sluice box is the perfect size for backpacking or heading out to sample a fresh gold bearing location.

The Nugget shares all the features and design of the Explorer model, with the material transport deck shortened by 10 inches. Depending on water flow conditions, it may be necessary to classify material down to 1/4-inch.

Clean-outs are easy and fast, taking less than a minute. Simply place the fluid bed end of the sluice in a 5-gallon bucket of water, plunge the chamber end up and down a few times to empty it, and you are ready to put the Gold Trap back into the water to capture more gold.



Features include:


self-cleaning fluid bed trap
Can operate in as little as 5 inches of water
Sampling riffles to check for gold
Rugged design for durability

DEVELOPMENT OF GRIZZLY GOLD TRAP SLUICES

The Grizzly Gold Trap features numerous design improvements over previous fluid bed sluices including:


Angled transport deck section
Higher capacity gold capture chamber: fewer cleanouts
Improved transport of material over grizzlies: fewer jam-ups
More efficient fluid bed/capture chamber: captures and holds gold
Increased capture and retention of fine gold: capture with confidence
Sampling riffles: Quickly assesses gold in material

Key Features (compared to older fluid bed sluices)

Processes unclassified material: greater volume of material* Higher capacity gold capture chamber: fewer clean outs Improved transport of material over grizzlies: fewer jam-ups More efficient fluid bed/capture chamber: captures and holds gold Increased capture and retention of fine gold: capture with confidence Sampling riffles: Assesses gold in material *NOTE: Low water flow situations may require classifying material to ½ to ¼ mesh, depending on conditions.

ENGINEERED TO IMPROVE FLUID DYNAMICS AND FINE GOLD RETENTION

Design concepts for the Grizzly Gold Trap originated from performance analysis of earlier models of fluid bed sluices, like the Bazooka sluice, and determining what design features could be improved, as well as determining which features performed well. Working with an engineering expert — more than 40-years experience in fluid dynamics — we developed various computer models of the Grizzly Gold Trap, which went through numerous changes designed to improve ease of set-up, retention of gold (especially fine gold smaller than -100), and running of unclassified material.

SIMULATED STREAM TEST SYSTEM

Based on our fluid bed design models, prototypes of the Grizzly Gold Trap were fabricated, including a transparent model tested in our recirculating water system. The recirculating system was developed specifically to study how material typically associated with gold (various sizes of gravel, light sands, black sands, etc.) moved and stratified on the transport deck, passed through and over the grizzly, entered the fluid bed chamber, stratified within the chamber, and was either held in the chamber or was exchanged out. Through these tests and observations, we gained a more in-depth understanding of how gold (from +20 sizes to -200 sizes) and other heavies stratify within different sections of the sluice, what design features help fine gold settle out of the laminar flow regimes, and how our fluid bed design (turbulent flow regime) continued to stratify and exchange material. In addition, we discovered design concepts that helps capture and retain a higher percentage of fine gold as small as -200. Based on the results of our testing and redesigns, the Grizzly Gold Trap was ready for field testing.