What is the role of coke in blast furnace?
Blast furnace ironmaking makes use of coke as the major source for both energy and reduction of iron oxides. In the blast furnace process, coke has multifunctions and plays an important role as reductant, burden support, and fuel. Consumption of reducing agents and fuel in German blast furnace ironmaking [35].
How the quality of coke does effects the reaction of a blast furnace?
A high quality BF coke is able to support a smooth descent of the blast furnace burden with as little degradation as possible while providing the lowest amount of impurities, highest thermal energy, highest metal reduction, and optimum permeability for the flow of gaseous and molten products.
How is coke used in the manufacture of steel?
-Coke is supposed to be added to the blast furnace at the time of preparation of steel from iron. -When coke is used up it produces a high amount of heat and little smoke, making it is suitable for the smelting of steel. -Therefore coke is used in the manufacturing of Steel.
How the coke consumption in the blast furnace can be decreased?
Two most promising known non-traditional blast furnace technologies can be used to minimize the coke rate: 1) the tuyere injection of the hot reducing gases with removal of CO2 from the top gas and 100% oxygen blast; 2) injection of 300-400 kg pulverized coal/thm (PCI-technology).
Why is Coke irreplaceable in BF?
Coke is an important metallurgical material and has irreplaceable function in BF (blast furnace) process because of its special properties.
How does a blast furnace work?
blast furnace, a vertical shaft furnace that produces liquid metals by the reaction of a flow of air introduced under pressure into the bottom of the furnace with a mixture of metallic ore, coke, and flux fed into the top. Rapid combustion is maintained by the current of air under pressure.
Why is coke needed to make zinc?
Zinc can promote production and incorporation of coke pores in the gasification reaction process. Zinc attributes to accelerating the decomposition of the ketone group in coke.
What is used for manufacturing coke?
Coke is a grey, hard, and porous fuel with a high carbon content and few impurities, made by heating coal or oil in the absence of air—a destructive distillation process. It is an important industrial product, used mainly in iron ore smelting, but also as a fuel in stoves and forges when air pollution is a concern.
Why is coke needed?
What is a blast furnace used for?
A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally pig iron, but also others such as lead or copper. Blast refers to the combustion air being “forced” or supplied above atmospheric pressure. In a blast furnace, fuel ( coke ), ores,…
How does the blast furnace work? The Blast Furnace is a large steel structure about 30 metres high. It is lined with refractory firebricks that can withstand temperatures approaching 2000 o C. The furnace gets its name from the method that is used to heat it. Pre-heated air at about 1000 o C is blasted into the furnace through nozzles near its base.
What is a blast furnace?
See Article History. Blast furnace, a vertical shaft furnace that produces liquid metals by the reaction of a flow of air introduced under pressure into the bottom of the furnace with a mixture of metallic ore, coke, and flux fed into the top.
What you should know about metallurgical coal?
Metallurgical Coal. Metallurgical coal differs from thermal coal,used for energy and heating,by its carbon content and its caking ability.