DEPURATION SYSTEMS ECOAL

Keeping the Aluminium at a constant concentration Eliminating production stops due to the emptying of oxidation baths Increasing production processes, in particular the electro colouring Reducing electrical energy’s consumption Reducing heat production Reducing sulphuric acid’s consumption Reducing pollutions issues Reducing sludge production Acid lost to dissolve aluminium Acid lost by dumping Acid lost by drag

ANODIZING OXYDATION During the oxidation process, part of Aluminium is dissolved into the acid bath, implying the increase of Aluminium concentration, thus forming Aluminum sulfate (Al2(SO4)3). Generally, the bath rich in aluminium is dumped, in order to be refilled in acid, causing a production stop. The application of ECOAL allows a continuous production, without any stops, keeping constant the bath conditions.

Filtration Aluminum removal Acid WASHING OPERATING PRINCIPLE The ECOAL unit separates an acid (H2SO4) from its salt (Al2(SO4)3), thanks to a chromatographic separation principle. A typical application for the ECOAL unit refers to anodizing oxydation. This feature is directly connected to the anodising tank, or to a sub-tank, and it continuosly works, removing the dissolved Aluminium in the oxydation baths.

▪ REQUESTED PROJECT DATA Current density Tanks number Max. installed power, for each tank Oxidation layer’s thickness Required Aluminium concentration Desmat process, with or with

Automatic / Manual running mode 24/24h working time Continuous monitoring on the filtration cycle Automatic stop of the filtration cycle once the best result is achieved MAIN FEATURES Touch-screen operator panel Flow controls Water recovery system Variable operator language Alarm messages display with help

APPLICATION EXAMPLE DATA: Installation 30.000 A Aluminium Removal 3 kg/h SOLUTION WITH ECOAL-300 UNIT: • Energy savings 30 kWh electric energy, given by the rectifier 10 kWh from the cooling system → 40 kWh of energy savings Sulfuric acid savings H2SO4 WITHOUT the unit, 3 kg Aluminium removed by 60 kg acid H2SO4: ratio 1:20 WITH the ECOAL unit, 3 kg Aluminium removed by 6-10 kg acid H2SO4: ratio 1:2 → 50 kg sulfuric acid saved, which don’t enter the production cycle Reduction of produced sludge to be disposed Since 60 kg sulfuric acid are eliminated by 20 kg lime (CaO) approx, by installing ECOAL...