Patent ID: 7767187

Claim:
A method for separating carbon products from used tires comprising steps of: a) lifting used whole tires into a decomposing chamber through the bottom of the decomposing chamber; b) injecting nitrogen gas into the decomposing chamber, into which used tires are charged, to remove oxygen inside the decomposing chamber; c) applying microwave with one or more predetermined frequencies, which are industrially allowed to use, when the pressure inside the decomposing chamber reaches the threshold partial pressure for which explosion does not occur; d) collecting gaseous oil at a cooling plate and liquid oil at a lower portion of the decomposing chamber, wherein the cooling plate is provided in an upper portion of the decomposing chamber to cool down gaseous oil into liquid oil and inclined so that the liquefied oil flows to one direction; and e) moving carbon black and iron cores by using a conveyor belt to a desired location after decomposition is complete; wherein the applied microwave heats the used tires and decomposes them into carbon products that include oil and carbon black and iron cores.