As a European leader in its field, this customer recycles annually 60,000 tonnes of end-of-life engines. The company uses the recycled metal to produce aluminium ingots, engine-grade cast iron, E40 milled steel, A4 cupola steel and custom alloys.
The gaseous effluents from the smelting process notably contain SO2 and HCl acid gases. These corrode facilities and produce micro-pollutants: dioxins, furans and heavy
metals.
Reducing the acid gases and micro-pollutants requires the use of a multi-purpose sorbent. It must be:
To meet the customer’s reduction targets Lhoist designed a custom blend of Sorbacal® SP & Sorbacal® Micro 4099 with an optimized feed quantity. This type of blend offers the following advantages:
Hydrated lime with a high specific surface area and high pore volume, Sorbacal® SP is designed to neutralize acid gases (SO2, HCl, HF) in a dry absorption process.
As an adsorbent, non-flammable and non-ATEX mineral reagent, Sorbacal® Micro 4099 reduces dioxins, furans, PCBs, PAHs and aromatic compounds.
During installation of our first baghouse filter we opted for activated carbon injection to reduce micro-pollutants. But using this system proved very restrictive, and the product flammability risk forced us to abandon it during the renovation of our filtration equipment. Lhoist then worked alongside us and created a specific Sorbacal® Micro blend. This was injected into the suction duct using a single silo equipped with an injection screw. The results were tangible, and the simplicity of this treatment method definitively convinced us to choose a similar system on the new filtration line we installed when doubling our production capacity.
Feedback from the plant manager