Purpose of the development: Suitable for iron smelting in a deficiency or absence of the natural gas injection into the blast furnace hot blast with oxygen content lower than the atmospheric level.

Recommended application field: Nitrogen supply system for blast furnaces can be installed for 1 - 3 months in any enterprise of ferrous metallurgy, as a part of which has an oxygen plant.

Technical characteristic: Reducing the oxygen content below 21% is achieved through the commissioning of technical blasting nitrogen, oxygen production by-product of oxygen workshops, not used and emitted into the atmosphere. Required nitrogen flow rate of 30 - 35 thousand m3 / h per blast furnace with a pressure of 50 mm of water.

Advantages over analogues: In the absence of natural gas costs on the construction of the nitrogen supply system for blast furnaces pays off for 6 - 15 days.

The development stage readiness: Ready for application

Technical and economic effect: Its cost, depending on the conditions and the selected option can be 1 - 5 mln. UAH. Fix this enterprise system you can independently or engaging contractors for the project and construction. The daily cost savings through the use of the proposed technology in blast furnace with capacity of 10 thousand tons of cast iron / day of 500 - 800 thousand UAH.

Description of the development:
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The technology of smelting iron in a deficiency or absence of the natural gas injection into the blast furnace hot blast with oxygen content lower than atmospheric - effective time energy-saving technology, greatly reducing the economic losses (before the introduction of pulverized coal to the steel mills). Saves blast temperature 1000 * C in the absence of natural gas, coke reduce overrun of 60 - 80 kg / ton pig iron without resulting in further reduction in blast furnace productivity. nitrogen supply system includes 2-3 types of fans and pipeline supply nitrogen to the air inlets of the blast machine. In a more simple embodiment, when nitrogen is used for supplying the existing kislorodoprovod, you must install only fans.

corresponds technical description
Conforms to technical characteristic

Photo

Country Ukraine

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E-mail: gal@uintei.kiev.ua