REMEX Processing

Plant visits of recycling facilities for incinerator bottom ash

The following videos provide information that makes the recycling of mineral materials from waste incineration more easily understood. As this is a relevant waste stream in many countries, industry professionals, stakeholders and the public should be able to gain a better understanding of the opportunities that our technology offers. Interested parties or delegations that would like to see a plant in live operation can send us a message applying for a plant visit.  

Michael Stoll introduces the metal recovery plant in Singapore

In Singapore, REMEX GmbH operates one of the most modern recycling facilities for the processing of municipal solid waste incinerator bottom ash and recovery of metals.

"Today I am proud to introduce Singapore’s first metal recovery plant for incinerator bottom ash. This milestone marks a pivotal step within Singapore’s long-term strategy to ensure a full recovery for residues from solid waste incineration. This facility is the first of its kind in Asia. It is a result of a successful collaboration of the NEA of Singapore and REMEX."

"The moment the contract was awarded to us in 2014, we were faced with two challenges: Space constraints on 1.2 hectares and a tight timeline. The goal was to create a highly efficient plant by maximising the resources available to us. We began construction in October 2014 and within eight months we have exactly achieved what we want. The metal recovery process reduces more than ten percent of the volume of the bottom ash that is sent to landfill, effectively extending its life."

"At the REMEX 1.4 hectares purpose built facility, incinerator bottom as or IBA is received daily at our ash receiving hall where it is stored and dried. Then fed into the input feeder for processing.

Once at the first station, the bar sizer screens the fresh IBA and removes any material bigger than 150 mm. And the excavator’s magnetic attachment eliminates all bulky ferrous material.

Back on a conveyer belt, fractions of ferrous metals are separated into metal bays by overbelt electro-magnets. Then at the flip-flow, IBA is sieved into various granular fractions and channelled onto the equipment.

On reaching the advanced recovery, a high-speed rotor isolates the lighter material onto a conveyor which transports it to the discharge hoppers. While the heavier fractions are channelled for the flip-flow for sieving and then to the eddy-current separators for separations.

At the eddy-current separators, non-ferrous material is separated from the IBA as it passes over a high-speeding rotating magnet below the conveyor where out of a total of eight eddy-currents, three are arranged in a cascading configuration for efficient recovery of small and non-ferrous metals.

At the last station, the manual hand-picking station, a team handpicks stainless steel and any remaining ferrous and non-ferrous material to ensure most of the metals are recovered.

Finally, the processed IBA is transported to the discharge hoppers that automatically load the ash-tipping trucks for transfer to the Tuas Marine Transfer Station.

And the recovered metals are loaded into containers for delivery to customers around the world.

Processing more than 600,000 tonnes of IBA a year, recovering up to 90% of ferrous and non-ferrous metals, REMEX helps reduce landfilling rate. And REMEX metal-free IBA can be treated for various applications, making possible zero IBA to the landfill.

REMEX Minerals – your partner in working for the future."

Visit five plants in less than three minutes

Waste materials of today are important resources for tomorrow – provided they undergo professional treatment. As a specialist in the recovery of raw materials from mineral waste, REMEX is one of the internationally sought-after service providers in the fields of mineral waste management, secondary aggregate production, underground stowage, remediation services and landfill operation.

REMEX’s core international activities include the processing of municipal solid waste incinerator bottom ash. In this specialist field, the company operates numerous plants of different categories. In Germany, the Netherlands and Singapore, for example, the group operates production facilities with an annual capacity of up to 700,000 tons.

With direct access to ports, a broad road and rail network and proximity to industrial and waste incineration plants, REMEX has secured a distinct competitive advantage.

With the technologies we develop, we provide customers at home and abroad with the right concepts for high-quality mineral recycling.

During processing, we extract valuable ferrous and non-ferrous metals from the ash. The remaining mineral fraction forms the basis for the production of high-quality secondary construction materials, which are used, for example, in road construction, earthworks or concrete products. Our technological expertise is therefore an indispensable element of a functioning circular economy.

IBA washing plant impressions

Our film shows a 360-degree drone flight of the IBA washing plant, which is located on the premises of the Dutch REMEX subsidiary HEROS in Sluiskil. The incinerator bottom ash (IBA) is treated in a hydromechanical two-stage process.