| Existing vitrification technologies are often expensive in terms of energy consumption and require the addition of fluxing reagents. There is therefore a need for a new, cheaper, easy to operate and eventually transportable technology.; Inspired by the oxygas foundry sand reclamation process developped at Ecole Polytechnique, the proposed technology has the particularity of relying on the use of an oxygas coaxial burner, modified in such a way that the waste can be fed directly into the flame (Gas-Contact Process). Therefore, the waste to be treated quickly reaches high temperatures.; The experimental unit used consisted of a vertical stationary kiln provided with a water quenching system and a treated products recovery tank. The combustion products temperature profile was given by several thermocouples inserted at the center of the kiln. Two more measured the inner wall temperature. The flue gases were monitored to estimate the amount of atmospheric pollutants emitted.; The main objectives of this project were to identify and solve operating problems, to establish safe operating procedures, to conduct series of tests with CUQ's electrostatic precipitator fly ashes so as to evaluate the feasibility of the vitrification process proposed, and to identify the factors having an influence on it. (Abstract shortened by UMI.)... |
