Michael Stoll introduces the metal recovery plant in Singapore
In Singapore, REMEX Mineralstoff 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."