Method and apparatus for separating foreign matter from pulverized rubber

An apparatus for separating a foreign matter from a pulverized rubber, comprising:

• a first water tank configured to float the pulverized rubber on water by a surface tension of the water acting upward to separate a high specific gravity foreign matter having a specific gravity of more than 1, which is submerged in the water;
• and
• a second water tank configured to submerge the pulverized rubber in water by eliminating or reducing the surface tension of the water acting upward to separate a low specific gravity foreign matter having a specific gravity of less than 1, which floats on the water, wherein
• the pulverized rubber floating on the water in the first water tank is sent to the second water tank together with water overflowing from the first water tank.