RAP for grinding sludge

grinding slurry
Max. productivity: (kg/h)
Power: (kWt)
Compression pressure, max.: (kg/cm²)
Briquette size in section: (mm)
60 х 40
Size: (LxWxH) (mm)
1300 х 1000 х 1600
Weight: (t)
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Our RAP briquette press allows you to dispose of or recycle grinding sludge more cost effectively. Expensive cooling lubricants are also recovered during the briquetting process. In most cases, they can be reused. Since the properties of grinding sludge vary greatly, we recommend that you have your material tested in our Technical Centre free of charge. This will enable us to tailor the briquette press to your individual requirements.


  • Recovery of expensive cooling lubricants
  • Briquetted grinding sludge no longer classified as “hazardous waste”
  • Reduced disposal costs
  • Possible profit from selling briquettes
  • Fully automatic 24h operation possible
  • Amortisation period can be extremely short


Ruf GmbH & Co. KG


Contact person

Konstantin Miroshnik

Sales Manager

+371 29474852 konstantin.miroshnik@rmp.lv
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Name RAP for grinding sludge RUF 4 for grinding sludge RUF 7.5-22 for grinding sludge RAP RUF 4-11 RUF 11-22 RUF 18,5-55 RUF 75-90
Material grinding slurry grinding slurry grinding slurry metal metal metal metal metal
Max. productivity (kg/h) 15-40 20-80 45-400 Aluminum 30-50 Brass, bronze, copper 50–100 Magnesium 20 Steel and casting 30–80 Titanium 20-50 Aluminum 60-300 Brass, bronze, copper 100–220 Magnesium 240-50 Steel and casting 100–200 Titanium 65-130 Aluminum 130-700 Brass, bronze, copper 150-1150 Magnesium 60-155 Steel and casting 200-850 Titanium 140-550 Aluminum 30-1600 Brass, bronze, copper 450-2700 Magnesium 100-550 Steel and casting 350-2800 Titanium 300-1000 Aluminum 900–2400; Brass, bronze, copper 3.000-5.000; Magnesium 730-950; Steel and cast iron 2.300-3.000; Titanium 800–1600
Power (kWt) 4 4 7,5-22 4 4, 5.5, 11 11, 15, 22 18.5, 30, 55 75, 90
Compression pressure, max. (kg/cm²) 3800 2300 2 000–3 000 1600–3800 600-3,700 1700-5000 1700–5000 2,500 - 3,900
Briquette size in section (mm) 60 х 40 Ø 60 Ø 80, Ø 100, Ø 120 60x40, 60x60, 80x40 60x40, 60x60, Ø60, Ø80 150x60, 150x75, 150x120, Ø60, Ø70, Ø80, Ø100 150x75, 150x120, Ø80, Ø100, Ø120 Ø120, Ø150
Size (LxWxH) (mm) 1300 х 1000 х 1600 1300 х 1500 х 1900 3000 х 2000 х 2000 1300 x 1000 x 1600 1300 x 1500 x 1900 līdz 1600 х 1600 х 1950 ок. 2700 х 2000 х 2200 ок. 2900 х 2400 х 2200 ок. 3800 х 3800 х 2500
Weight (t) 1 1.3 3,3 - 3,7 1 1,4 - 1,8 3,3-3,9 4,6 - 6,5 12 т.

Our projects

RUF Lignum R6 and RUF Lignum R4 in Belarus

RUF Lignum R6 and RUF Lignum R4 in Belarus

In August of this year, we installed two new briquetting presses in Belarus - RUF Lignum R6 and RUF Lignum R4. he further improvement of the hydraulic system of the Lignum R has led to an efficiency increase of around 25%. The company recycles plywood chips by producing briquettes with a total output of over 1200 kg/hour, Lignum R6 - 670 kg/h and Lignum R4 - 575 kg/h.

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.


Why carry out test briquetting?

By testing, our specialists determine the ability of chips to briquetting, which press model is best suited for a particular material, whether there is a need for options. In the process of testing, parameters such as the density of the briquette, the strength of the briquette (friability test), the amount of coolant squeezed out are determined.


How is a test pressing done? Is it done free of charge?

Test pressing is done free of charge and without any obligation on your part, and is carried out in Technical Centre using your own material. At your request, you can be present at the test pressing. The results are important for the choice of the briquetting machine – for example, briquette thickness, residual moisture, durability to withstand handling, the amount of cooling lubricants recovered, etc.


Where to buy spare parts and consumables for the RUF press?

Our warehouse in Riga always has the main spare parts for RUF presses. Some positions, according to your application, we order the manufacturer and arrange delivery to our warehouse. The manufacturer maintains an extensive stock of spare parts for almost all RUF presses produced to date.

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Jersikas street 14,
Riga, Latvia, LV-1003
Working hours: 08:00 - 17:00 +(371) 67 286 442
for questions and offersrmp@rmp.lv
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