Why Choose MSI for Gold Recovery Equipment?

Gold mining equipment is one of the many applications of the aggregate and mining industry we are involved with. MSI has designed and built projects numbering in the thousands since starting operations in 1978 and can help you custom design a gold recovery plant to fit your needs, utilizing computer modeling and engineering support, along with years of in field experience.

We have taken our knowledge and technology of equipment manufacturing from our large aggregate and mining producing plants over the years and work side by side with gold recovery companies in developing some of the finest recovery units.

We have a long term relationship with a leading gold recovery company, Placer Recoveries Inc., who has over two decades of recovery experience and with over 40 recovery sites, ranging from 50 tons per hour to 1500 tons per hour. Through testing development together we have designed and fabricated many recovery systems over the years from the Yukon throughout the Rocky Mountains. From screens, crushers, sluice boxes, trommels and grizzly feeders to conveyors we work side by side in sharing technology and experience.

In the most recent years we have taken the industrial machinery knowledge from large scale operations and put it to use in Placer gold recovery applications that may interest you. See some examples to the right.

MSI S7 (200 TPH) & S8 (300 TPH) Gold Trommel Plant

Our gold trommels have a full power 4 point drive system which eliminates the chain drive and has a full variable speed control. Testing showed that some of the biggest complaints with trommels was screen blockage, so we have taken and installed full rubber octagon screening media to help eliminate this issue, and expensive but needed adaptation. Another advantage with this screen media, is it has 10 to 15 times the life of steel. Additionally, the screen media snaps into place which only take minutes instead of days or weeks as with some other systems.

Specifications and Information

Test Results:

With machine properly equipped and proper screen sizing and even fed material test plant was able to achieve up to 250 TPH with the S7 & 340 Tons Per Hour with S8, MSI rates the S7 at 175 to 200 TPH and the S8 at 250 to 300 TPH using materials as follows:

60% @ 3/4" minus
25% @ 1 1/2" to 3"
15% @ 3" plus
1200 gallon per min (S7) and 1800 gallon per min (S8)

Results will vary depending screens, water and material conditions.

Additional Features and Information

Trommel:

Trommel design uses a 8 sided polygon, 60 inch diameter drum, 14 feet of pre-scrub area with reinforced drive rings for Trommel drives.

Polygon allows maximum break up of materials.
Trommel is designed to operate at 4 degree slope.

Trommel has replaceable wear plates in all wear areas.
Trommel uses urethane screens with tapered relief holes which we recommend.

Urethane Screens almost eliminates the plugging issues that haunt trommels.
Urethane life can be up to 10 to 15 times that of steel.
Screens can be change in minutes instead of days.
Trommel design allows for steel (flat) punch plates if desired.

Trommel drive:

We incorporate a 4 point live drive system (Which eliminates the chain).
Fully hydraulic.
Full variable speed control.
Oversized gear boxes, bearings and shafts.

Internal spray tube with interchangeable brass spray nozzles for final rinsing action.

Grizzly Pan Feeder and Screen:

Bolt in wear plates for easy replacement.
Hydraulic driven.
Full variable speed control.
Independent Spray bars (not attached to vibratory unit, eliminates spray bar breakage).
Can use either tapered Grizzly bars or Punch plate in screening area.

Nugget Trap:

Material moves across a nugget trap prior to entering trommel.
In most cases 40 to 60% of gold is caught here.
Folds down for easy cleaning.

Structure:

Utilizes Wide flange high tensile beam.