In 1995 CDK became the first private-sector operator in Japan of an incinerator-ash melting facility. Processing ash generated by local-authority waste incinerators in ferroalloy furnaces, we perfected a process of high-temperature melting and detoxification to recover recyclable eco-slag with applications in construction and landscaping materials.
Japan as a whole generates some six million tons of incinerator ash annually, but many local authorities lack sufficient final disposal facilities and have trouble processing it adequately. The problem of industrial waste also grows worse with each year.
Soil treatment needs are also growing since the Soil Contamination Countermeasures Law has come into force.

Largest Vitrification Capacity in Japan

It was against this background that in 2001 we began work on construction of a dedicated electric furnace at Kashima that began operation in April 2002. In June of the same year we began vitrification and detoxification of industrial waste and contaminated soil as well.
With two pre-existing ferroalloy furnaces and two dedicated furnaces, CDK currently has an annual vitrification capacity of 100,000 tons.

Waste Processed