Abstract
The amount of waste plastics has gradually increased and reached around 9.5 million tons in 1997. However, only 42 % of waste plastics is utilized for a material, feedstock and thermal recycling effectively. The law for Recycling of Containers and Packaging has started since April 2000. To promote recycling of waste plastics, the development of an efficient recycling system has become an urgent issue for the environmental conservation and resources recycling. The material recycling of waste plastics from the household is just limited because of containing the impurity in it and complex with other materials. Thus, the feed stock recycling of waste plastics such as a liquefaction, gasification and the use of blast furnace, coke oven, cement kiln have become important technology to promote the recycling of household waste plastics. Especially, to utilize polyvinyl chloride on these established process, the classification and dehydrochlorination process of PVC is the most important. This paper is a review of the use of waste plastics as a substitute reducing agent for coke and pulverized coal in blast furnaces. In the method of using blast furnace, waste plastics can be used high efficiency with the simple processing of it due to the function of blast furnace. It is considered that waste plastics injection into the blast furnace is a favorable way to realize feedstock recycling of waste plastics and to solve environmental issue.
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