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Blast furnace gas is generated at higher pressure and at about 100–150 °C (212–302 °F) in a modern blast furnace. This pressure is utilized to operate a generator (a top-gas-pressure recovery turbine (TRT)), 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 ...
The raw materials are brought to the top of the blast furnace via a skip car powered by winches or conveyor belts. [82] There are different ways in which the raw materials are charged into the blast furnace. Some blast furnaces use a "double bell" system where two "bells" are used to control the entry of raw material into the blast furnace.
For blast furnaces, direct reduction corresponds to the reduction of oxides by the carbon in the coke. However, in practice, direct reduction only plays a significant role in the final stage of iron reduction in a blast furnace, by helping to reduce wustite (FeO) to iron. In this case, the chemical reaction can be trivially described as follows ...
Aerial view of the Völklingen Ironworks. In 1873, Julius Buch planned and built a steel works near Völklingen on the banks of the Saar river. [1] However, the steel works ceased operation only 6 years later, and were acquired by Karl Röchling. in 1881, construction on a blast furnace for producing iron began, and two years later the first smelter began operation. [1]
A metallurgical furnace, often simply referred to as a furnace when the context is known, is an industrial furnace used to heat, melt, or otherwise process metals. Furnaces have been a central piece of equipment throughout the history of metallurgy ; processing metals with heat is even its own engineering specialty known as pyrometallurgy .
As blast furnaces re-equipped after World War II, the favoured power source was either the diesel engine or the electric motor. These both had a rotary output, which worked well with contemporary developments in centrifugal fans capable of handling the huge volumes of air. Although the reciprocating steam blowing engine continued where it was ...
The PCI method is based on the simple concept of primary air (termed the "conveying gas") carrying pulverized coal which injected through a lance to the tuyere (mid-bottom inlet of a blast furnace), then mixed with secondary hot air (termed the "blast") supplied through a blowpipe in the tuyere and then piped to a furnace to create a balloon ...
A tuyere, seen from inside a blast furnace An old tuyere in Nok, Nigeria. A tuyere or tuyère (French pronunciation:; English: / t w iː ˈ j ɛər /) [1] [2] is a tube, nozzle or pipe allowing the blowing of air into a furnace or hearth. [3] Air or oxygen is injected into a hearth under pressure from bellows or a blowing engine or other devices.
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