Abstract
These descriptions about recycling of copper, lead and zinc are respectively summarized as follows:
Copper: One of the problems of copper's recycling is that the cost for collection of scrap copper is very expensive, because copper is diversified into many merchandizes. And as the value of copper is unstable, it is difficult to get the stable collection continuously.
Lead: The increasing tonnage and percentage of the use for lead-acid batteries were found to be the significant feature. The recycling rate of lead depends much on that of spent lead-acidb atteries. It was concluded that further improvement of the recycling rate would be required especially through the increased collection of spent batteries and treatment in primary lead smelters.
Zinc: The recovery of recycled zinc has been increasing its importance from the viewpoints of resource conservation, pollution control and saving land-fill sites because Japan is quite poor in natural resources.
