How is the basic oxygen furnace heated?
The Blow The Gas Offtake Hood is lowered onto the Furnace. The water cooled Oxygen Lance is then lowered. This carries the hot Oxygen to the surface of the hot metal, increasing the temperature in the Furnace and melting all of the metal.
Which of the following is one of the basic ingredients that enter a basic oxygen furnace?
The basic oxygen furnace (BOF) is a vessel used to convert pig iron, of about 94 percent iron and 6 percent combined impurities such as carbon, manganese, and silicon, into steel with as little as 1 percent combined impurities.
Is a basic oxygen furnace the same as a blast furnace?
Blast furnace-basic oxygen furnace uses iron ore as its base raw material that accounts over just 50% of BOF steel costs, and electric arc furnace uses scrap as its base that represents around 75% of EAF steel cost. The Basic Oxygen Steelmaking process differs from the EAF is that BOF is self-sufficient in energy.
What is the charge in a basic oxygen furnace?
The majority of steel manufactured in the world is produced using the basic oxygen furnace. In 2000, it accounted for 60% of global steel output. Modern furnaces will take a charge of iron of up to 400 tons and convert it into steel in less than 40 minutes, compared to 10–12 hours in an open hearth furnace.
What is produced in a blast furnace?
Blast furnace produces Hot metal (Liquid Iron) using Iron ore, Coke, Sinter, Pellets and fluxes such as Lime-stone, Pyroxenite, Quartzite reacting with oxygen from pre heated air.
What is a BOS plant?
BOS (Basic Oxygen Steelmaking) plant. Molten iron from the blast furnace is transported in specialized refractory brick lined ‘torpedoes’ on rail cars (varying in capacity from 200-450 tonnes) to the BOS plant where the iron is refined to produce steel of desired quality and composition.
What is the chemical formula of slag?
The slag can generally be expressed by the formula FeSNa2S(O). Both reactions 9.5 and 9.6 are heterogeneous and endothermic in nature.
What is LD process?
steel process. Process in which oxygen is blown downwards at high velocity through a watercooled lance onto the surface of the hot metal contained in a basic lined vessel. These may be iron ore, sinter, or roll scale, but usually steel scrap is the main material used. …
Why oxygen is used in steel plants?
Oxygen pretreatment in the ladle is used to reduce the metalloid content of open hearth furnace charges. In solid fuel combustion, producer gas can be upgraded to increase melting rates in open hearth furnaces. Oxygen is used to increase ferromanganese production and to decrease the specific fuel consumption.
Why is scrap added in BOF steelmaking?
Thermal balance of basic oxygen furnace (BOF) steelmaking is controlled primarily by the scrap added as coolant. These coolants have varying cooling effects and significantly influence the blowing parameters and turn-down performance.
What are the measurements of an oxygen furnace?
Special measurements and control models for a basic oxygen furnace (BOF) Teräskonvertterin erikoismittaukset ja ohjausmallit Jari Ruuska PYOSÄÄ, JARI RUUSKA, 29.5
How does the basic oxygen furnace ( BOF ) work?
Basic Oxygen Furnace (BOF) Dr. Dmitri KopeliovichBasic Oxygen Furnace (BOF)is a steel makingfurnace, in which molten pig iron and steel scrap convert into steel due to oxidizing action of oxygen blown into the melt under a basic slag.
Why are oxygen furnaces used in steel factories?
It is used in about 65% steel factories around the world due to its high productivity and low cost [4], [2]. In general, if the endpoint parameters of molten steel can be predicted accurately, the operators can adjust the added amount of the auxiliary raw materials, blowing oxygen and coolant timely [5], [6], [7], [8], [9].
What kind of bricks are used in a basic oxygen furnace?
Refractory bricks for lining basic oxygen furnaces are made of either resin bonded magnesite or tar bonded mixtures of magnesite (MgO) and burnt lime (CaO).
