Blast furnace gas

Blast furnace gas

Blast furnace gas (BFG)[1] is a by-product of blast furnaces that is generated when the iron ore is reduced with coke to metallic iron. It has a very low heating value, about 93 BTU/cubic foot, because it consists of about 60 percent nitrogen, 18-20% carbon dioxide and some oxygen, which are not flammable. The rest is mostly carbon monoxide, which has a fairly low heating value already. It is commonly used as a fuel within the steel works, but it can be used in boilers and power plants equipped to burn it. It may be combined with natural gas or coke oven gas before combustion or a flame support with richer gas or oil is provided to sustain combustion. Particulate matter is removed so that it can be burned more cleanly. Blast furnace gas is sometimes flared without generating heat or electricity.

Blast Furnace Gas is generated at higher pressure and at about 100 °C (212 °F)-150 °C (302 °F) deg.C in a modern Blast Furnace. This pressure is utilized to operate a generator (Top-gas-pressure Recovery Turbine - i.e.TRT in short), which can generate electrical energy up to 35 kwh/t of pig iron without burning any fuel. Dry type TRTs can generate more power than wet type TRT.

Auto ignition point of blast furnace gas is approxmiate 630 °C (1,166 °F)-650 °C (1,202 °F) and it has LEL (Lower Explosive Limit) of 27% & UEL (Upper Explosive Limit) of 75% in an air-gas mixture at normal temperature and pressure.

Higher concentration of carbon monoxide makes the gas hazardous.

See also

Sources

  1. ^ Blast Furnace Gas-Fired Boiler for Eregli Iron & Steel Works (Erdemir), Turkey

Wikimedia Foundation. 2010.

Игры ⚽ Нужно решить контрольную?

Look at other dictionaries:

  • blast-furnace gas — aukštakrosnės dujos statusas T sritis chemija apibrėžtis 50–59% N₂, 25–34% CO, 4–16% CO₂, 1–10% H₂ ir iki 2% CH₄ mišinys. atitikmenys: angl. blast furnace gas rus. доменный газ; колошниковый газ …   Chemijos terminų aiškinamasis žodynas

  • blast furnace gas — aukštakrosnės dujos statusas T sritis Energetika apibrėžtis Degiosios dujos, kurias sudaro: (12–30) % anglies monoksido, nedideli kiekiai vandenilio, metano, iki 50% azoto. Koksui deginti naudojant deguonies papildytą orą, mažėja azoto ir daugėja …   Aiškinamasis šiluminės ir branduolinės technikos terminų žodynas

  • Blast-furnace gas —   The waste combustible gas generated in a blast furnace when iron ore is being reduced with coke to metallic iron. It is commonly used as a fuel within steel works.   U.S. Dept. of Energy, Energy Information Administration s Energy Glossary …   Energy terms

  • blast-furnace gas — Смотри доменный газ …   Энциклопедический словарь по металлургии

  • Blast furnace — A blast furnace is a type of metallurgical furnace used for smelting to produce metals, generally iron. In a blast furnace, fuel and ore are continuously supplied through the top of the furnace, while air (sometimes with oxygen enrichment) is… …   Wikipedia

  • blast furnace — a large vertical furnace for smelting iron from ore, using coke as fuel: designed so as to direct a continuous blast of air through the fuel in order to obtain a high rate of combustion. [1700 10] * * * Vertical shaft furnace that produces liquid …   Universalium

  • mixed coke-oven and blast-furnace gas — Смотри коксодоменный газ …   Энциклопедический словарь по металлургии

  • Gas engine — This article is about engines that use gaseous fuel. For gasoline engines, see Petrol engine. For other uses, see Internal combustion engine. Model of an S type Hartop Gas Engine. A gas engine means an engine running on a gas, such as coal gas,… …   Wikipedia

  • Gas —   A non solid, non liquid combustible energy source that includes natural gas, coke oven gas, blast furnace gas, and refinery gas.   U.S. Dept. of Energy, Energy Information Administration s Energy Glossary   ***   Gaseous fuel (usually natural… …   Energy terms

  • blast — [blast, bläst] n. [ME < OE blæst, puff of wind < IE * bhlē , var. of base * bhel , to swell, blow up > BALL1, L flare] 1. a gust of wind; strong rush of air 2. the sound of a sudden rush of air or gas, as through a trumpet 3. a strong,… …   English World dictionary

Share the article and excerpts

Direct link
… Do a right-click on the link above
and select “Copy Link”