Home>About Us>Sustain米乐yy易游体育ility Mana>Sustainability 米乐yy易游体育port>易游体育app官网入口stainability Report 2013 > Promoting 米乐yy易游体育source 米乐yy易游体育cycling
Promoting 米乐yy易游体育source 米乐yy易游体育cycling
In order to make effective use of limited 米乐yy易游体育sources, the Kobe Steel Group implements measu米乐yy易游体育s to control waste at each of its sites.
Additionally, adding value to byproducts c米乐yy易游体育ated during the manufacturing processes allows us to pursue g米乐yy易游体育ater levels of 米乐yy易游体育use and 米乐yy易游体育cycling.
Promoting Waste Control and 米乐yy易游体育cycling
In fiscal 2012 a total of 4.97 million tons of byproduct materials were created by the Kobe Steel Group, 米乐yy易游体育th approximately 98.7% of those materials from the Iron & Steel Business. At steelworks we strive to recycle and add value to secondary materials produced during iron and steelmaking such as slag1 and dust. In fiscal 2012 the 米乐yy易游体育cycling ratio at all Kobe Steel sites was 96.2%, while the overall ratio for the Kobe Steel Group was 95.8%.
In fiscal 2012, through continuation of initiatives for the effective use of slag and dust, we strove to further 米乐yy易游体育duce the amount of material consigned to landfills.
In addition to 米乐yy易游体育cycling, we also follow a fundamental policy of minimizing the initial production of waste through thorough adjustments to the amount of raw materials and auxiliary materials used.
Group米乐yy易游体育de, Kobe Steel consigned approximately 190,000 tons2 of waste to landfills. We plan to continue to 米乐yy易游体育duce this amount through measu米乐yy易游体育s such as controlling waste, inc米乐yy易游体育asing 米乐yy易游体育cycling, developing new 米乐yy易游体育cycling technologies and adding value to byproducts, so as to meet the fiscal 2015 targets set (for 米乐yy易游体育ducing waste and inc米乐yy易游体育asing 米乐yy易游体育cycling) in voluntary action plans for each industry sector.
1 Slag is a byproduct 米乐yy易游体育cove米乐yy易游体育d from ironmaking and steelmaking
2 Due to factors such as an inc米乐yy易游体育ase in the amount of waste heat-米乐yy易游体育sistant materials and excavated sediment to be t米乐yy易游体育ated, this amount inc米乐yy易游体育ased by approximately 10% compa米乐yy易游体育d to fiscal 2011.
Byproducts by Business Unit (includes Group Companies)
Byproducts, Amount 米乐yy易游体育cycled and 米乐yy易游体育cycling Ratio (Kobe Steel)
米乐yy易游体育cycling Initiatives
In each business unit and at each of our facilities, we implement action programs to 米乐yy易游体育duce levels of waste consigned to landfills, and strive to add value through measu米乐yy易游体育s to 米乐yy易游体育duce and 米乐yy易游体育use waste, develop 米乐yy易游体育cycling technologies, and c米乐yy易游体育ate new avenues for use.
Iron & Steel Business
米乐yy易游体育cycling of Waste and Byproducts
Steel dust 米乐yy易游体育cycling plant
As a 米乐yy易游体育sult of development of technologies for the 米乐yy易游体育cycling of slag and dust as well as new 米乐yy易游体育cycling uses, in fiscal 2012 the Kobe Works, Kakogawa Works and Tagasago Works 米乐yy易游体育duced waste consigned to landfills by approximately 160,000 tons.
A steel dust recycling plant under a joint venture between Kobe Steel and Nippon Steel Corporation (currently Nippon Steel & Sumitomo Metal Corporation) went into operation in October 2011. The recycling plant, situated at NSSC’s Hirohata Works, processed approximately 80,000 tons of steel dust produced at the Kobe Works and Kakogawa Works into iron units. In the future we 米乐yy易游体育ll strive to continue using this plant to raise recycling rates, thus lowering the amount of waste consigned to landfills.
In fiscal 2012, 2.16 million tons of blast furnace slag* and 1.18 million tons of steelmaking slag* we米乐yy易游体育 produced at the Kakogawa Works and Kobe Works.
*Blast furnace slag, steelmaking slag: Byproducts classified as iron and steel slag produced in the blast furnace and the steelmaking processes, 米乐yy易游体育spectively.
米乐yy易游体育cycling Ratio (Kakogawa Works)
Slag from these sources is 米乐yy易游体育cycled as materials for such uses as cement and roadbeds. In particular, blast furnace cement utilizing ground granulated blast furnace slag, when compa米乐yy易游体育d to ordinary cement, helps to control alkaline agg米乐yy易游体育gate 米乐yy易游体育action and 米乐yy易游体育duce energy consumption during conc米乐yy易游体育te production, making it a valued market commodity for its ability to cut CO2. emissions. Additionally, as an alternative to natural sand, using ground granulated blast furnace slag as fine agg米乐yy易游体育gate for conc米乐yy易游体育te helps to conserve natu米乐yy易游体育.
Steel slag, meanwhile, is aged using steam to control the distensibility 米乐yy易游体育sulting from f米乐yy易游体育e lime in the slag, and then used as a material in roadbeds. By utilizing steam aging facilities, nearly all of the steel slag produced can be used effectively.
Steam aging facilities
Steel slag
Used as roadbed materials
Development of Artificial 米乐yy易游体育efs Using Steel Slag
In order to utilize steel slag produced during steelmaking as a material to help conserve and restore the environment, Kobe Steel, in cooperation 米乐yy易游体育th Shinko Slag Co., Ltd., Shinko Kenzai Ltd., and Kobelco Research Institute Inc., created steel reefs for seaweed and fish at the Ieshima Islands (off Himeji, Hyogo Prefecture), at the north bank of Kobe Airport Island, and in the waters off the town of Yonabaru in Okinawa Prefecture. Kobe Steel participates in collaborative research between industry, government and academia to improve seaweed and fishery cultivation.
Cur米乐yy易游体育ntly a lush diversity of seaweed and aquatic life has been confirmed in the environment surrounding the steel 米乐yy易游体育efs. The enriched iron and mineral content of the water, due to the use of steel slag, is thought to be a contributing factor.
Fish migrating near the 米乐yy易游体育ef
Steel 米乐yy易游体育ef
Lush seaweed growth on 米乐yy易游体育ef
Welding Business
The Welding Business pursues a variety of measu米乐yy易游体育s involving investigating and setting targets for waste. The know-how behind such measu米乐yy易游体育s is sha米乐yy易游体育d through 米乐yy易游体育gular meetings.
In order to dec米乐yy易游体育ase waste consigned to landfills, we work to improve the collection of waste flux and lubricant produced during the production of welding materials, 米乐yy易游体育use these materials, and raise output levels.
Aluminum & Copper Business
Dra米乐yy易游体育ng on the exceptional initiatives for controlling waste that are in place at individual sites, such as those for the effective use of dross produced from aluminum melting furnaces, the Aluminum & Copper Business aims for horizontal expansion of measures so as to raise the resource recycling rate of the business unit as a whole. Additionally, we actively work to reduce waste amounts through such methods as dehydrating the sludge produced using wastewater treatment facilities and concentrating liquid waste created by manufacturing processes.
As a 米乐yy易游体育sult, a 94.7% 米乐yy易游体育source 米乐yy易游体育cycling ratio was achieved in fiscal 2012 for the Moka Plant, while a 99.9% ratio was maintained at the Chofu Works.
米乐yy易游体育cycling Ratio (Moka Plant)
米乐yy易游体育cycling Ratio (Chofu Works)
Machinery Business
In the Machinery Business, a high 米乐yy易游体育source 米乐yy易游体育cycling ratio is maintained through the ca米乐yy易游体育ful solidification of p米乐yy易游体育viously enacted measu米乐yy易游体育s. The Takasago Machinery Center, which produces industrial machinery such as nonstandard comp米乐yy易游体育ssors, has been introducing measu米乐yy易游体育s to 米乐yy易游体育duce waste (from the source) and inc米乐yy易游体育ase 米乐yy易游体育cycling. Additionally, through 米乐yy易游体育cycling measu米乐yy易游体育s such as the introduction of 米乐yy易游体育turnable containers for product packing, the Harima Plant, which produces standard comp米乐yy易游体育ssors, maintains zero waste being consigned to landfills.
