Waste incinerators normally consist of several different parts. These parts are: the rotary kiln which is the primary combustion chamber, an afterburner- the secondary combustion chamber, and an air pollution control and monitoring system. Incineration is the first step of the process and involves introducing the wastes into the rotary kiln. The rotary kiln is kept at 1,800 degrees Fahrenheit or higher, and the kiln tumbles the waste like a cement mixer or clothes dryer to make sure that every side of the waste is exposed to that heat. Components of the waste material that are turned into gases are pumped into the afterburner, and the materials which remain in solid state are expelled as ash into a separate container to be taken away and treated. Those gases in the afterburner are then exposed to heat at 2,200 degrees Fahrenheit, and the extreme heat then forces the gases to break their chemical bonds further and become stable.