32 to 35 12 oz. aluminum cans to a pound.

heat to melt 1 pound of aluminum.

• 321 KJ/kg latent heat of melting aluminum
• 1 pound = 0.453592 kg
• therefore 145.603032 kJ per pound
• 1 kJ = 1,000.00 watt seconds (W·sec)
• therefore 146 kw seconds, or 0.0406 KWh

• heat of fusion = 10.71 kJ/mol
• 1 mode AL = 26.982 g
• 10.71 kJ/26.982 g = 0.397 kJ/g or 397 kJ/kg

Does not include heat needed to get Aluminum up to the melting temperature.

• Molar heat capacity 24.20 J/(mol·K)
• 0.8894818768 J / g / deg K
• 0.8894818768 kJ / kg /deg K
• 0.40293529019 kJ / pound / deg K

Resources
How many cans does it take to make a pound?
Latent Heat of Melting for some common Materials
Wikipedia - Aluminum