UBC Aluminum Cans Paint Removing Machine

The UBC aluminum cans paint removing machine is specialised equipment for the pre-treatment of used beverage cans (UBC). This facility employs a proprietary technique to process the paint layers on discarded beverage cans. Through high-temperature carbonisation, the paint coating on UBC aluminium cans is decomposed and removed, yielding a clean metal substrate without compromising the aluminium’s structural integrity. The treated can surfaces achieve a high degree of cleanliness, enabling direct smelting. This process significantly reduces environmental pollution from waste beverage cans while simultaneously recovering high-purity aluminium and copper materials. It facilitates the circular reuse of resources. The carbonization paint removing furnace holds considerable significance in resource recovery and environmental protection.

UBC Aluminum Cans Paint Removing Machine

Equipment Process Principle

The core principle of the UBC aluminum cans paint removing machine involves utilising high-temperature conditions to induce pyrolysis reactions in the paint layer. The paint coating on aluminium cans primarily consists of organic resins, pigments, and additives. Under elevated temperatures (400–600°C), organic compounds decompose into gases and small molecular substances. The metal substrate remains relatively stable. During carbonisation, the paint layer is completely removed. The metal surface achieves a highly clean state, suitable for direct subsequent smelting or reuse. Compared to traditional chemical recycling methods, which require substantial quantities of strong acids and organic solvents, producing significant wastewater and waste residue while causing corrosion to the metal substrate, the high-temperature carbonisation process eliminates the need for chemical agents. Paint removal is achieved solely through thermal energy, offering superior environmental performance and enhanced metal recovery rates.

Composition of Aluminium Can Paint Removal Carbonisation Machine

1. The complete aluminium can paint removal and carbonisation production line comprises the following components:
   Feeding apparatus: Includes conveyors and vibrating feeders. These uniformly deliver crushed aluminium can fragments into the paint removal carbonisation furnace.
2. Carbonisation Furnace Body: Constructed from high-temperature resistant and corrosion-resistant materials (refractory bricks or special alloy SS310S). The furnace interior features a multi-temperature zone structure to ensure uniform heating of the material. Equipped with temperature sensors and an intelligent control system, it enables precise adjustment of the temperature curve.
3. Cooling and Discharge System: The thermally decomposed aluminium fragments are cooled via water or air cooling. Subsequently, secondary sorting or eddy current separation is employed to segregate aluminium and iron materials.
4. Gas Purification System: Gases generated during paint carbonisation contain volatile organic compounds (VOCs). These are purified through condensation, spray scrubbing, activated carbon adsorption, and catalytic combustion to meet emission standards.

Furthermore, our facility incorporates advanced technology with an integrated waste heat recovery module. This utilises high-temperature exhaust gases to preheat feedstock, thereby reducing energy consumption.

Operational Process

Pre-treatment Stage

Waste beverage cans are first shredded into 5-10cm fragments using a metal shredder. Residual liquids are removed, followed by magnetic separation to segregate iron and aluminium cans.

Carbonisation Stage

Shredded fragments are conveyed to the UBC aluminum cans paint removing machine. Under oxygen-depleted conditions, they are heated to approximately 500°C. Carbonisation duration: 20-30 minutes. The paint layer on aluminium cans fully decomposes into gases such as O₂ and H₂. An extremely thin oxide film forms on the metal surface.

Sorting Stage

Carbonised aluminium flakes are cooled via a cooling machine. Further purification of aluminium is achieved through an eddy current separator. The final products are clean aluminium and iron ingots, suitable for direct use in casting new ingots or smelting.

Technical Advantages

• Outstanding Environmental Benefits
  The entire recycling process generates no wastewater. The production line incorporates a secondary combustion chamber and activated carbon adsorption units, ensuring volatile organic compound (VOC) emissions comply with standards. Treated exhaust gases contain VOC levels below 50mg/m³, meeting the Comprehensive Emission Standard for Air Pollutants. Energy consumption per tonne of aluminium cans processed ranges from 150-250kWh. This represents over 40% energy savings compared to traditional chemical methods.
• High Metal Recovery Rate
  Aluminium recovery purity exceeds 99.2%. For iron cans, recovery is virtually loss-free. Compared to conventional incineration, metal oxidation losses are reduced by 80%.
  High Automation Level
• Utilising a PLC intelligent control system enables continuous production. Daily processing capacity exceeds 30 tonnes. Advanced models can achieve automated conveyor line operation. Processing capacity reaches 2-3 tonnes per hour.
• Precise temperature control employs a PID intelligent temperature regulation system, preventing localised overheating that causes aluminium oxidation.

Currently, UBC aluminum cans paint removing machine achieve over 98% aluminium can recovery rates. With the global promotion of circular economy policies, can de-painting and carbonisation technology is entering a period of rapid development. Annual processing of recycled aluminium cans exceeds one million tonnes.