Steel Salt
How would you separate aluminum cans, steel cans, soda cans, milk jugs, and salt?
How would you separate aluminum cans, steel cans, soda cans, milk jugs, and salt?
We have:
1 A long conveyor belt
2 A large tank that can be filled with water
3 Several powerful magnets hanging above the conveyor belt
4 Nets for skimming the tanks and scooping material from the bottoms.
I need a way to separate the 4 recycled materials. Oh, and by the way, all the materials/contents are grounded into a fine powder. Please help me find the answer…. Thanks! 
First of all, soda cans are now made of aluminum – so lets group them with aluminum.
The steel cans are the easiest to remove via the use of the magnets.
The milk jugs are probably made of plastic and probably have a specific gravity less than 1 – that is they will float. They can be removed with skimmers at the surface of the water.
The aluminum has a specific gravity of greater than one -so it will sink. They can be removed via a mechanism to scoop material from the bottom of the tanks.
The salt is the only item which dissolves in water. If the tank is located outdoors, all you have to do is to use the sun to assist in converting the water to water vapor – thus leaving the salt at the bottom of the tank.
Resonantie
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