gravity suction dredge design

COMPARISON OF EXPERIMENTAL AND THEORETICAL …

largest forces is applied on the cutter head. To determine the design criteria for a given cutter suction dredge the forces on the cutter head must be known. Forces on a 33 cm (13 inch) model cutter head have been measured using a model cutter suction dredge 10.2 cm ( (4 inch)) suction and 3 inch (7.6 cm) discharge) in

Chapter 5 Mining and At-Sea Processing Technologies

Water jet suction airlift Diver-held suction Bucket dredging Hopper dredge All techs Suction dredge Bucket Bucket Grab Suction dredge Suction dredge Gravity/jigs 2 Gravity/jigs 18 Gravity/jigs 1 Dewatering only12 Gravity/jigs 5 Pilot plant mining Gravity/jigs 10 Very small scale Gravity/jigs 1 Pilot mining in 1986 with Bima Motion …

Homemade Gold Dredge Plans Free | PDF | Gold …

Panning Tub by Tom Villone, Arizona: Most traditional sluices had a type of material at the end of the sluice. Homemade Suction Dredge by Clinton Gold dredge home made 2. Website Design by Solid Cactus. Water …

4. The Plain Suction Dredger

H h 2 4.6.2 The suction depth A second important design parameter is the suction depth. This determines whether an extra underwater pump is needed to achieve the required …

7.4.1: Dredging or Dredge Mining | GEOG 000

7.4.1: Dredging or Dredge Mining. A dredge is the principal piece of equipment used in the dredging method and, essentially, a dredge is a boat containing specialized mining and materials handling components. Accordingly, a dredge requires a body of water in which to operate. In many cases, this is a natural body of water such as a river or a lake, but in …

Self-Priming Slurry Pumps

EDDY self-priming slurry pumps are able to draw liquid into their suction hose, even if the pump and the liquid are not already submerged in the liquid. Our self-priming slurry pumps are specifically designed for handling heavy-duty industrial and mining applications where a consistent flow of abrasive and corrosive materials is required.

Dredging Equipment

Our Diver Operated Dredge design is easily mobilized and designed for pumping production rates of 75 to 150 cubic yards of material per hour. ... Auger Suction Dredges are used in many dredging applications where there is a liner such as poly, clay, concrete, and other type of plastic liners. ... Non-Clog, High Viscosity, High Specific Gravity ...

Plan and design your own home made suction dredge for gold …

How to plan, design and build your own homemade gold suction dredge so you can prospect and mine for gold: from

How To Suction Dredge for Gold: The Basics

Dredging for gold involves using a suction hose to vacuum up sand, dirt, and clay, then filtering it through a header box to separate out the gold. Want to learn more about how to suction dredge for gold? …

Fluid dynamics of dredging | Physics of Fluids | AIP Publishing

Fluid dynamics of dredging. Centrifugal pumps are used for pumping slurry from the dredge cutter head or drag head located in front of the suction pipe inlet to the final placement site or dredge hopper. Cavitation is an important phenomenon that must be avoided on the suction side of the pump that is quantified by the net positive suction head.

Some dredge basics If you are in...

Here are a few examples of a well balanced dredge: 2" backpack dredge. Small but effective 2.5 hp 100 GPM pump with 10" wide. box. 2.5" dredge 4 hp engine with a 200 GPM pump with a 12' wide sluice box. 3" dredge 5.5 hp with 250 GPM pump 14" wide box. 4" dredge 6.5 hp with 275 GPM pump with 16' box.

Autonomous Dredge

The dredge uses an array of electronic instrumentation to control the four onboard winches to literally pull itself along a predefined dredging path, raise and lower the pump, and regulate pump RPM. Due to the cable-based pump deployment the dredge can up to 100 ft deep. All while featuring a non-clogging design to minimize machine downtime.

Slurry Pump Calculations

Example: Pumping a water-based slurry at a height of 1000 m above sea level. Liquid temperature 40°C, liquid level 2 meters above the pump inlet. Formula: NPSHa = air pressure – vapor pressure + level in sump inlet. NPSHa = 9,2 – 0,4 + 2 = 10,8. Pump sizing information to pick the right pump for your needs and extensive information on ...

Water Jetting Ring

EDDY Pump Advantages. Remote Operated, Autonomous Dredge. Non-Clog, High Viscosity, High Specific Gravity, High Abrasives, Low pH Pumping Design. 40-70% Solids Pumping by Weight. Ability to pump objects of up to 12-inches in diameter. American Built. State-of-the-Art Research and Development Facilities on site.

Frequently Asked Questions

California Water Code section 13172.5.(a) defines suction dredge mining as: "the use of a mechanized or motorized system for removing or assisting in the removal of, or the processing of, material from the bed, bank, or channel of a river, stream, or lake in order to recover minerals." Suction dredge mining, as addressed in this Fact Sheet ...

How To Suction Dredge for Gold: The Basics

Priming the Pump. Before you use your suction hose to vacuum up water and material, get your dredge's pump ready for a day of work. Dredge pumps are designed for aquatic use only, so running air …

Some dredge basics

2.5" dredge 4 hp engine with a 200 GPM pump with a 12' wide sluice box. 3" dredge 5.5 hp with 250 GPM pump 14" wide box 4" dredge 6.5 hp with 275 GPM pump with 16' box 5" …

8 Inch Diamond and Gold Dredge |

Model 8160High Powered, Diesel Industrial Gold and Gem Dredge. Â. This 8 inch commercial dredge is ideal for gold and gem recovery. Powered by an efficient 67 hp Deutz diesel engine driving our high performance P1500 pump. The P1500 pump produces 1500 Gallons per minute providing ample suction for depths to 50 feet.

Sea Technology Magazine, "Remote-Operated Submersible Gold Dredge

The Sub-Dredge comes equipped with various size EDDY Pumps, but the one utilized in Nome was a 4-inch pump that had a flow rate of 700-1000GPM. Due to the high suction capability of the EDDY Pump along with the strong digging capability of the Sub-Dredge, production rates of up to 150 cubic yards of material an hour were achieved.

Chapter 3

3-1. Purpose. This chapter includes a description of the dredging equipment and techniques used in dredging activities in the United States and presents advantages and limitations for each type of dredge. Guidance is provided for selection of the best dredging equipment and techniques for a proposed dredging project to aid in planning and design.

Benefits & Technology of our Dredge Pumps

The EDDY Pump design and superior performance allows for a significantly decreased Ownership Cost over centrifugal and PD Pumps. Please see link below to see a the Total Life Cycle and Ownership Cost Study …

» Suction Dredging for Gold

Just to give you some idea, a top-of-the-line five-inch gold dredge and the miscellaneous gear needed to run a small dredging operation can be obtained for less than $6,000. The size of a gold dredge is determined by the inside-diameter of its suction hose–usually anywhere from two to ten inches. A single person customarily can operate a four ...

Gold Dredges & Gold Dredging

The difficulty is that the force of the suction, being intense close to the suction pipe and rapidly decreasing in intensity a short distance from the suction, causes all the sand and gravel to be picked up and leaves the gold behind, due to its greater specific gravity. Furthermore, the suction dredge cannot work in stones or bowlders.

Hydraulic Dredge Design

Hydraulic Dredge Design. Let us assume that it is desired to design a hydraulic dredge capable of raising average hydraulic material 15 feet above the pump through 4000 feet of pipe line and at the same time be suitable for general all round work involving also short lines and low heads. It is generally accepted that a 20 or 22 inch …

Excavator Mounted Dredge Pump Attachment

Non-Clog, High Viscosity, High Specific Gravity, High Abrasives, Low pH Pumping Design; Pump and dredge built by EDDY Pump. The competition uses 3rd party pumps, not the case at EDDY Pump; Pump 40-60% Solids by weight; Ability to pump objects of up to 11-inches in diameter with 12 inch version. State-of-the-Art Research and Development ...