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Home | Shredding pulper ropes

Pulper Rope Shredding

Ragger wire processing – cut disposal costs and reclaim steel
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WEIMA PreCut 2500 shreds pulper ropes from paper recycling, crane loads hopper
View inside shredder with rotor shredding pulper waste rope
Shredded rejects of plastic, metal
Shredded pulper ropes can be used for heat through burning of secondary fuel
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The use of waste paper in paper production is constantly increasing. In Germany alone, around five million tons of recyclable residues are produced every year, mostly in the form of pulper ropes made of metal and plastic or loose spit materials.
These so-called pulper rejects require specialized shredding technology in order to recover valuable materials such as plastic (as a substitute fuel) or metals such as steel, copper and aluminium. Without prior processing, disposal is associated with high costs for paper manufacturers.

Customer applications: Pulper rope recycling with WEIMA

Practical examples of successful shredding with WEIMA shredders
An orange WEIMA shredder is loaded with pulper ropes from paper recycling
Pulper rope shredding
Pulper rope shredding with a WEIMA PreCut 2500
A WEIMA PreCut 2500 shredder shreds big pulper ropes from paper recycling.
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Pulper rope shredding
Pulper Strings Ropes Rejects Waste Shredding with WEIMA PreCut 1500
WEIMA PreCut 1500 single-shaft shredder reduces pulper braids / ropes / rejects / ragger wire from paper production down to size.
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WEIMA CSO Kay trained in front of a glazed office
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WEIMA portfolio for shredding pulper ropes

The right machine for every material
Single-shaft shredder
W8 PowerLine series
The machines in the PowerLine series can be used universally. Variable equipment and sizes enable precise adaptation to your specific requirements. The counter knives are user-friendly and can be adjusted from the outside and are protected by an additional cover plate.
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Single-shaft shredder
W8 PreCut series
The PreCut series is characterized by extremely high throughput rates. PreCut machines are often used as pre-shredders in multi-stage processing systems, but are also suitable as a stand-alone solution. The solid PreCut rotor is particularly resistant to foreign matter thanks to Vautid wear protection. Reinforced side walls make the frame of the shredder extremely solid.
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Single-shaft shredder
W5 series
With working widths of 1,400 mm, 1,800 mm or 2,200 mm, the W5 series takes on a wide variety of materials. The inspection flap and the lift-up screen basket make the single-shaft shredder particularly easy to maintain. Thanks to the wide conveyor belt cutout, large quantities of shredded material can be transported away quickly and cleanly.
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Single-shaft shredder
S7 series
With their extremely sturdy design and large rotor diameters of up to 700 mm, shredders of the S7 series offer almost unlimited possibilities for the shredding of plastic waste. They are up to any challenge and can be equipped with a powerful hydraulic drive.
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Example applications from the secondary fuel industry and paper production

Waste paper recycling in the pulper
Pulper rejects ropes in the pulper
Rejects are used for secondary fuel (RDF)
Shredded rejects of plastic, metal
Baled pulper ropes
Pulper ropes from pulper
Pulper ropes used for RDF production and heat generation
RDF from pulper ropes
Pulper rope rejects from paper production
Shredded pulper ropes from plastic, metal, film and more
Shredder pulper rope cuttings
Pulpers are used during the production of new paper
Pulper rejects are stored before the shredding process
Detailed shot of pulper ropes and waste
Separation of metal waste from pulper rope cuttings from paper production
Shredded pulper waste on a conveyor belt
WEIMA PreCut 2500 shreds pulper waste from paper recycling process and is loaded by crane
View inside shredder with rotor shredding pulper waste rope
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Recycling of pulper ropes

Key facts at a glance
Pulper waste rope from paper production
What are pulper ropes?
Pulper braids, also known as rejects, are a waste product of paper production. They can consist of up to 50 % metal wires. The reason for this is the delivery of waste paper in the form of pressed bales. To keep them in shape, wires are used, but also plastic straps. Pulper ropes can often be several meters long and also contain materials such as plastic film, string, wooden parts and small plastic parts.
Pulpers are used during the production of new paper
Pulper ropes from pulper
How are pulper ropes and rejects formed?
During paper production, waste paper, cardboard and other raw materials are dissolved and defibered in a pulper, a large agitated vat, with the help of water. However, impurities such as wires, films, strings or plastic residues that cannot be broken down also enter the process. To prevent these materials from getting caught in the pulper and having to be laboriously removed later by hand or crane, a catching device is used. As a rule, a long rope is lowered into the pulper, on which the foreign matter gets caught. This gradually creates a pulper plait - also known as a reject - which is pulled out of the pulper using a plait winch and disposed of.
Pulper rope shredding in WEIMA shredder
How can pulper ropes be disposed of economically?
The disposal of pulper ropes without prior shredding and sorting is very costly and not very sustainable – after all, they contain considerable material and energy potential that can be used economically. The resulting plastic fraction in particular provides the ideal conditions for use as a substitute fuel (RDF). For example, brick or cement manufacturers and power plant operators use this high-calorific secondary fuel for their plants, kilns and calciners. But also paper manufacturers have already discovered their own use of this fuel and are thus becoming less dependent on fossil fuels.
More about Waste-to-Energy
WEIMA PreCut 2500 shreds pulper ropes from paper recycling, crane loads hopper
View inside shredder with rotor shredding pulper waste rope
How does shredding work?
Pulper rope sections can be fed directly by wheel loader, crane or conveyor belt into the hopper of the WEIMA single-shaft shredder without pre-treatment or manual preparation. This saves time and personnel. After the paper rejects have been shredded to a homogenous grain size and separated from metal residues by means of an overband magnet, the material can be stored or dried. It can then be used thermally as a high-quality substitute fuel, refuse derived fuel (RDF) or solid recovered fuel (SRF).
Shredded pulper ropes can be used for heat through burning of secondary fuel
From Pulper to Rejects: Managing Non-Paper Materials in the Recycling Process
In paper production, unwanted foreign materials such as wires, plastics, and textiles are separated during the pulping process. These so-called “bears” – tangled masses of wire and plastic – can block the system and often require crane removal. A more efficient method is forming pulper ropes that can be extracted via support rollers. The pulper itself is a large mixing drum, using process water to dissolve waste paper into fibers for new paper production. Foreign materials, known as rejected fractions, are separated out and include plastics, films, metal parts, and textiles. These rejects are typically used as substitute fuels in thermal recovery.
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Heavy duty machine design

WEIMA shredders for highly abrasive materials can be equipped with numerous options to protect against wear – for less downtime and lower maintenance costs. The solid machine frame ensures particular robustness. Rotors can be reinforced with Vautid and screens with Creusabro. Optionally, large knives (up to 130 x 130 mm) protect against foreign bodies, Vautid can also secure knife carriers.
To protect the rotor face plates, we recommend replaceable Creusabro wear plates that can be fitted on both sides. The cutting chamber can also be optionally reinforced with replaceable Creusabro plates. For particularly heavy-duty applications, we offer an approx. 20 mm thick, wear-resistant Creusabro screen.

Vautid jacket on a rotor

WEIMA rotor with Vautid protection

Vautid weld on for shredder rotor

Vautid weld-on for shredder rotor

Concha Vautid no rotor PowerLine

Proteção contra o desgaste do rotor Vautid

Casco do rotor Vautid

Revestimento de rotor Vautid

ANteção antidesgaste com revestimento de tinta

WEIMA WKS rotor concha vácuo

Proteção contra o desgaste do revestimento do rotor

Revestimento Vautid para pré-triturador

Did you know?
In Germany, an average of 760 kg of recovered paper was used to produce one ton of paper in 2018. Tendency: rising.

Source: Federal Environment Agency

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Success stories

Pulper rope recycling with WEIMA
August 16, 2021

Pulper Waste. Power. Profit.

A Turkish company, KMK Paper, becomes self-sufficient by converting its pulper waste from paper production into a fuel that provides energy for its own operations. The company lowers costs while reducing waste in the environment!

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