Grinding sludge briquetting


Our grinding sludge press forms briquettes from grinding sludge, recovering expensive cooling lubricants, such as oil or emulsion, in the process. These may actually account for more than 50% of the starting material.
The special briquetting technique used for grinding sludge is based on a special construction, developed by RUF, which has been technically adapted to deal with this particularly abrasive material. Due to its compact structure, the grinding sludge press can easily be incorporated into existing production processes and is suitable for 24h operation.


In addition to the recycling of grinding sludge, the recovery of cooling lubricant also results in significant savings. Costs are cut to a considerable degree thanks to the reduction in the amount of grinding sludge to be disposed of. Grinding sludge briquettes may also be classed as “non-hazardous waste”, although the agreement of the local authorities needs to be obtained.

Briquetting ensures a more sustainable, cleaner workplace. Depending on customer requirements, we offer grinding sludge presses for throughputs between 40 and 350 kg per hour.

Name RAP for grinding slurry RUF 4 for grinding slurry RUF 7,5-22 for grinding slurry
Material grinding slurry grinding slurry grinding slurry
Max. productivity (kg/h) 15-40 20-80 45-400
Power (kWt) 4 4 7,5-22
Compression pressure, max. (kg/cm²) 3800 2300 2 000–3 000
Briquette size in section (mm) 60 х 40 Ø 60 Ø 80, Ø 100, Ø 120
Size (LxWxH) (mm) 1300 х 1000 х 1600 1300 х 1500 х 1900 3000 х 2000 х 2000
Weight (t) 1 1.3 3,3 - 3,7


  • Recovery of expensive cooling lubricants – oil or emulsion
  • Reduction in the amount to be disposed of
  • Savings in logistics and transport
  • Compact construction
  • More than 35 years’ experience


Ruf GmbH & Co. KG


Contact person

Konstantin Miroshnik

Sales Manager

+371 29474852
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Our projects

RUF 500 un Strojplast

RUF 500 un Strojplast

In July 2018, SIA RMP installed a new briquetting press RUF 500 in a Latvian wood processing company with an additional bunker, which split the material between two presses, and a conveyor belt and the Strojplast packing machine. In order to interact with all the equipment, it was necessary to install modern control panels to inform about the operation of each machine and warning about a errors.

See all projects



What are the advantages of briquetting metal chips?

Reducing the volume of chips during briquetting will reduce the cost of production space, storage, and transportation by several times. The coolant contained in the chips is squeezed out and collected in the press pan, after additional filtration it can be returned to production. Briquettes are no longer waste, they are a valuable secondary raw material for foundry production, which can replace part of the lump metal in the charge and increase the yield of metal during remelting.



What are the advantages of briquetting grinding slurry?

- extract up to 90% of expensive grinding oil from the sludge and return it to production, saving on the purchase of new oil,

- significantly reduce the volume of grinding sludge,

- reduce the cost of sludge disposal, because sludge after briquetting is almost dry,

- increase the level of environmental safety of the enterprise. Sludge in briquetted form, without oil content, can be transferred from a hazardous waste category to a less hazardous one.


What other metal waste, besides metal shavings and grinding sludge, can the RUF press briquet?

For example, aluminum foil, aluminum cans, aluminum caps from medicine containers, spent cartridges, titanium sponge, shredded copper wire. Send us information about your waste and we will definitely answer you on the possibility of briquetting, in case of doubt, we will offer to conduct a test briquetting.


What are the requirements for producing briquettes?

In general, almost all materials can be made into briquettes. However, the chip particles should not be bigger than 50mm. The chips should not contain any impurities. For Wood & Biomass the moisture content should be less than 12 % (max 15 %).


Is it possible to briquet magnesium shavings, because it is prone to spontaneous combustion?

Yes, it is possible and even necessary. Briquetting of magnesium shavings is an effective way to eliminate the risk of spontaneous combustion, due to the high density of the briquettes there is no oxygen access to the shavings.


How do I find the right briquetting machine?

We have many years of experience in briquetting which means that our experts are well-qualified to provide you with professional advice in choosing the right briquette press. We work with you to identify your individual requirements on the basis of the material in question and the production conditions. This then allows us to offer you custom-made briquetting machines or even complete briquetting solutions.


Is there an “all-rounder” press for all possible materials?

We always try to find the best possible briquetting solution. Our range has therefore been specifically developed for certain materials, production conditions or marketing purposes of the briquettes. Our experts will be happy to advise you with respect to processing several different materials with one briquetting machine.


Do we need to crush/shred the chips before briquetting?

In the case of long, woolly chips, it may be necessary to crush the starting material beforehand. In this case, we can offer complete solutions together with the relevant suppliers. With our free pressing test, we can establish whether your starting material can be briquetted or whether it needs to be crushed beforehand.

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We recommend seeing

Single shaft shredder EZ4


Conveyors and transfer units

These units are designed for waste reloading from the trolley into the processing machine bunker.




Double Shaft Shredder ZW 300



Lai nošķirtu lielizmēra piemaisījumus no metāla skaidām tiek izmantots vibrosiets.


Vacuum suction units

For chip transportation can be used vacuum piping systems, located at the top part . As a vacuum aggregate is used a rotary piston blower.


Silo systems

Jersikas street 14,
Riga, Latvia, LV-1003
Working hours: 08:00 - 17:00 +(371) 67 286 442
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