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Jamshedpur, June, 16, 2006
Tata Steel in collaboration with NEDO (New Energy & Industrial
Technology Development Organisation), Japan has embarked upon a new approach to conserve
both heat energy and fresh water and abate air and water pollution associated with the
conventional wet quenching process during manufacture of Metallurgical Coke. A Memorandum
of Understanding has been signed today by Mr.K.Koizawa, Executive Director, NEDO and
Dr.T.Mukherjee, Deputy Managing Director (Steel), Tata Steel and Mr.Farooqui, Joint
Secretary, Department of Economic Affairs, Ministry of Finance, Government of India, in
the presence of officials of Ministry of Steel, to use Dry Quenching Technology for
cooling of Coke. The new technology will use Nitrogen gas to recover the sensible heat of
hot coke and generate steam which would be used for power generation.
According to this MoU, NEDO will contribute the equipment produced in
Japan, under the Green Aid Plan of the Government of Japan and Tata Steel will set up the
plant and disseminate the know-how to other integrated steel plants. This is the second
time that Tata Steel has received Japanese technology from NEDO under the Green Aid Plan.
Majority of the electrical power generated in India is by burning coal.
For producing 1 MW of power in a conventional coal fired power plant, as much as 6500
tonnes of green house gas (carbon dioxide) would be produced per year. In an integrated
steel plant, huge quantity of heat may get wasted in direct and indirect cooling. In the
conventional coke making process in steel plants, red hot coke is pushed out of coke ovens
and quenched with large quantity of water resulting in evaporation of water into the
atmosphere. Naturally the heat energy is lost in the process. In addition, quenching of
coke results in air and water pollution.
The Coke Dry Quenching (CDQ) process offers distinct advantages of
sensible heat recovery, conservation of water and zero air and water pollution. This is an
established technology, popular in the more advanced countries. The dry coke produced in
the process enhances the productivity of blast furnaces, the work horses of integrated
steel plants. Annually one million Cubic meter of water will be saved and, almost three
quarters of million tonnes of steam will be generated for use in power plants. This
technology, commonly known as CDQ, would have favorable impact on climate change issues
being addressed under the Kyoto Protocol. The carbon dioxide emissions into the atmosphere
will come down by 140,000 tonnes per year.
Tata Steel believes, as always, that better environment management
leads to superior and long lasting corporate performance. Its steel works, mines and
collieries and the town services in Jamshedpur are ISO 14001 certified for environment
management. Under the Green Millennium Countdown programme, the Company planted and
ensured 1.5 million surviving trees in its mines and all other operating units.
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