What process involves heating air or gas mixtures to 9032°F (5000°C) for the thermal destruction of hazardous wastes?

Plasma pyrolysis technology is a process that utilizes extremely high temperatures, often reaching around 9032°F (5000°C), to thermally decompose hazardous waste materials. This advanced technique involves using plasma arcs to generate the necessary heat, which allows for the breakdown of complex organic molecules into simpler compounds. The extreme temperatures achieved during plasma pyrolysis are effective in not only destroying hazardous substances but also in minimizing the formation of harmful byproducts associated with lower-temperature combustion processes.

In contrast, while rotary kiln incineration is also an effective thermal treatment method for hazardous wastes, it operates at significantly lower temperatures, typically around 1600°F to 2000°F (871°C to 1093°C). Fuel blending involves combining various fuels for combustion purposes but does not involve the high-temperature destruction of hazardous waste as plasma pyrolysis does. Thus, plasma pyrolysis stands out as the correct answer due to its use of exceptionally high temperatures specifically intended for the thermal destruction of hazardous waste.