Abstract: An apparatus and process for pyrolyzing waste tire chips, the tire chips passed into an inclined rotary kiln having an output end. The tire chips are saturated by oil in the inclined rotary kiln and are pyrolyzed by indirectly heating with a heated gas. The pyrolyzed tire chips and oil produces a vapor product and a solid product that are separated within the kiln by gravitational separation. The vapor product is processed to condense oil and a portion of the condensed oil is recycled to the rotary kiln. The solid product is separated into oil and char, a portion of the oil recycled to the inclined rotary kiln for saturating the tire chips. The vapor product following the oil removal is used to produce the heated gas to heat the rotary kiln.