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RUF Briquetters create dense, high-quality bricks out of wood, metal, and sludge that can be reused, recycled, or sold.

the briquetting process explained

Our briquetting process ensures the highest quality

Ever wonder how briquettes are made? RUF Briquetting Systems, North America's leading manufacturer of briquetting machines, has refined our briquetting process through the years to ensure the highest-quality products. Below is an overview of the process, which is nearly identical for both wood waste and scrap metals. Each production process produces one briquette per cycle.

The compression process

• Byproduct material is loaded into a feed hopper.
• A screw conveyor in the hopper carries the material to a precharger chamber.
• The running time of the screw conveyor is calculated every cycle and controlled by a programmable logic controller (PLC) to ensure the production of a quality briquette in every cycle. The screw conveyor cycle time changes if the particle size or density of the feed material changes.
• Once the screw conveyor fills the precharger chamber, the precharger compresses the material into a pressing chamber.
• The main press piston pushes the material into one of two dies in a pressing mold. The material is formed into a dense briquette.
• Pressures are monitored and compression continues until reaching a preset value to ensure a dense briquette.

Extra step in scrap metal briquetting process

• When the press piston compresses metal against the pressing plate, it squeezes coolant from the material and collects it in a sump located beneath the briquetting machine. Once the liquid reaches a predetermined fill level, a pump is triggered and dispenses the fluid out of the sump and into another container for reuse.

Machine resets for next cycle

• When the compression process is complete, the mold cylinder changes the position of the pressing mold to the other position and the briquette aligns with an ejection opening.
• Ejectors located on either side of the main press piston push the briquette out through ejector holes in the front plate of the briquetting machine.
• The main compression piston and precharger return to their home positions.
• The empty die aligns with the compression piston.
• With the precharger back in the upward position, the conveyor charges feed material into the press chamber to begin a new cycle.
• This process continues until the material in the feed hopper has been depleted.

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(1) Allow organic waste material to dry in the sun until it is dry to the touch (may take 1 day+).

(2) Dig a shallow pit just a bit larger than the diameter of the barrel. This pit will be used to contain fire and must be safely away from any flammable materials. The depth of the pit need not exceed 15 cm.

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(3) Locate three fire resistant bricks, or three rocks of similar size. Arrange the bricks around the edge of the pit so that the barrel can be supported standing on its end without touching the ground.

(4) Tip the barrel on its side and stuff all of the holes on the bottom with wads of dry waste material. These will be used as fuses to carry fire into the barrel and should be packed tight enough to stay in place, but loose enough to burn easily.

(5) Place the barrel upright (with side B facing up) on the bricks. Place the long rod along the central axis of the barrel.

(6) Leaving the pole in place, stuff the barrel full of dry waste. Packing the waste too tight will require excessive cooling times. Too loose will not produce the maximum amount of char per burn cycle. Experimentation with the waste at hand is required.

(7) Remove the central pole.

(8) Tip the barrel on its side and light all of the fuses on the bottom of the barrel.

(9) Tip the barrel upright on the bricks so that the fuses can continue to burn without being extinguished by contact with the soil.

(10) Smoke will be observed coming up from the chimney hole. This smoke will initially be gray indicating that water is being driven out of the waste.

(11) The smoke will eventually turn transparent and occasional flames will be observed from the top of the barrel. Wait until the flames become continuous and start a timer.

(12) After approximately 3 minutes (experimentation is required to match this time to your waste),using heat-resistant gloves, carefully place the sheet metal cover over the top of the barrel and remove the bricks supporting the barrel. This can be done by tipping the barrel a little and kicking the bricks out one by one.

(13) Working quickly, cover the top of the barrel with soil to help prevent air leaks. Also heap soil around the sides of the barrel to prevent air from reaching the bottom of the barrel.

(14) The hot materials inside the barrel will begin turning to charcoal in the absence of oxygen.

(15) Wait until the barrel and all of the material inside the barrel is cool. This should take about two hours. If the barrel is opened too soon, the hot materials with my ignite in contact with air.

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