CDK produces and markets manganese ferroalloys, rare-earth magnet alloys, and hydrogen storage alloys and other battery materials.
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| Municipal waste | Incinerator ash and soot, crushing residues, non-combusted residues,sewage incineration residues, sludge |
| Industrial waste | Rubble, glass waste, ceramic waste, waste metals, sludge (inorganic only),slag, cinders, soot |
| Industrial waste subject to special controls |
Sludge (inorganic only), slag, cinders, soot, asbestos waste, other |
| Contaminated soil | Dioxin-contaminated soil, etc., soil reclaimed from landfills |
Waste vitrification capabilities
CDK waste vitrification capabilities are as stated below.
|
Plant | Licensed Performance (tons/day) |
Capability (tons/yr) |
| Current operations | Ferromanganese electric furnaces (2) Dedicated electric furnaces (2) |
115.3 160.2 |
100,000 total |
| 4 furnaces total | 275.5 |
Our four-furnace vitrification installation permits continuously stable processing. As CDK is also licensed for haulage, customers need not arrange for transport vehicles.
Development Timeline
| Aug 1994 | First vitrification trials conducted |
| Jan 1995 | Second vitrification trials conducted |
| Sept 1995 | Municipal waste processing facility licensed (Ibaraki prefecture) |
| Nov 1995 | Municipal waste processing and haulage licensed (Kashima city) |
| Mar 1997 | Pronounced an “Earth-friendly company” in the field of resource conservation by Ibaraki prefecture |
| May 1998 | Licensed for soot (Ibaraki prefecture) in addition to municipal waste |
| Jan 2001 | License for construction of dedicated furnace facility for incinerator ash vitrification (Building Standards Law) |
| Mar 2001 | Municipal waste processing facility licensed (Ibaraki prefecture) (Incinerator ash and soot vitrification |
| Apr 2001 | Start of dedicated incinerator ash melt furnace construction |
| Apr 2002 | Full-scale operation of dedicated furnaces in waste recycling center |
| Jun 2002 | Licensed as processor for industrial waste and industrial waste subject to special controls, and started operations (at vitrification facility) |
| Feb 2003 | Obtained approval for all furnaces for processing, in addition to municipal waste, industrial waste, including that subject to special controls |
| Oct 2004 | Began operation of second dedicated waste melt furnace at waste melt and recycling center |
| Feb 2005 | Awarded certificate as “outstanding Ibaraki prefecture recycling operation” |
Features of vitrification system
1. Effective utilization of pre-existing facilities and melting in dedicated furnaces
・We have employed our pre-existing ferroalloy furnaces for incinerator ash vitrification simultaneously with ferroalloy production, thus obtaining the useful components of incinerator ash as by-product for use in ferroalloy production.
・Our dedicated furnaces are capable of processing waste that, due to its properties and composition, is of limited use in ferroalloy furnaces.
・Operating multiple processing furnaces permits CDK to plan for customer processing needs with security.
2、High-temperature treatment for detoxification and stabilization
Vitrification is one treatment available for soot, classed as waste subject to special controls by directive no. 194 of the then-Ministry of Health and Welfare. High-temperature melting is capable of rendering dioxins completely harmless.
3、High-efficiency volume and weight reduction
We achieve volume reductions of up to 35% and weight reductions of up to 60%.
4、Resource recycling
We control the granularity of vitrified product for reuse as roadbed material and landscaping pavement.
(Status of JIS implementation as of March 2003: technical report published July 2002)
