How do you remove ash from carbon black?

Answer 1

1. The origin of ash content in carbon black

There are two origins of the ash in pyrolyzed carbon black. It may come from the dust and dirt on surface of waste tyres, or such organic and inorganic compounds in tyres as CaCO3, Ca (HCO3)2, SiO2 and kaolin. These substances are mixed into the carbon black during the pyrolysis process of tyres.

2. Removing ash from carbon black

Due to the various compositions of ash, it is a complex process to remove ash form carbon black. Moreover, as the ash is fully mixed with the carbon black, a chemical process is usually prefered instead of a physical process to reduce the as content in carbon black.

3. Process flow

Carbon black → steel wire seperated → carbon black primary crushing → conveyor feeding → reacting tank → washing tank → neutralizing tank → washing → drying → fed to grinding machine with screw conveyor.

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Answer 2

To remove ash from carbon black, you can use a process called acid leaching, where the carbon black is treated with an acid solution to dissolve and remove the ash content. Alternatively, you can also use a thermal process called calcination, where the carbon black is heated to high temperatures to burn off the ash content. Both methods are effective in removing ash from carbon black.

Answer 3

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