TREATMENT AND RECYCLING OF PLASTIC WASTE INCLUDING PVC BY USING SUMITOMO METALS' GASIFICATION AND SMELTING SYSTEM

摘要

A new type of waste gasification and smelting system, using iron-making and steel-making technologies based on high-temperature metallurgy, has been developed. This system, Sumitomo Metals' waste gasification and smelting system can steadily gasify and smelt municipal waste by using top blow lance together with sideways blow oxygen lances. This system can be applied for high heat and material recovery of plastic waste including polyvinyl chloride (hereinafter refer to as "PVC")- This system can steadily gasify and smelt plastic waste including PVC the same as municipal waste. As a result of waste gasification of over 1343K and rapidly gas quenching, dioxins at the chimney exit were less than 0.01ng-TEQ/Nm~3. Most of the chlorine in plastic waste was converted into hydrogen chloride. The hydrogen chloride will be collected in commercial plant and it can be recycled. On the other hand, ash components in the plastic waste are smelted in a high temperature reduction atmosphere and the heavy metal-free high quality slag was produced.