HORNO BASICO DE OXIGENO BOF PDF

HORNO BASICO DE OXIGENO BOF PDF

Aceración con Hornos Básicos de Oxígeno La refinación del arrabio en el proceso BOF o aceración al oxígeno se lleva a cabo en un recipiente que asemeja. Horno Básico de OxígenoUNIDAD 6 Horno Siemens Martin. Convertidor de Soplado Nariz (N) Lanza de Oxigeno (L) Cintur. The basic oxygen furnace (BOF), whose profile is shown in the figure, is a tiltable vessel lined with refractories such as magnesia carbon brick. Auxiliary.

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For his first commercial plant in Sheffield,Bessemer remelted cold pig iron imported from Sweden as the raw material for his hot metal. The iron oxide, FeO, yorno of the bath increases with blowing time especially as the carbon in the steel falls below 0.

Scrap selection is further complicated by the wide variety of steel products.

Horno de Oxígeno Básico (HOB) by Carlos Chan on Prezi

This charcoal derived pig iron was low in phosphorus and sulfur, and fortuitously high in manganese which acted as a deoxidant. The bottom tuyeres used in the Bessemer and Thomas processes could not withstand even oxygen-enriched air, let alone pure oxygen.

There are two interesting historical footnotes to the original Bessemer story: Obsolete scrap may contain a variety of other objects which could be hazardous or explosive. Slag in the ladle results in phosphorus reversion, retarded desulfurization, and possibly “dirty steel”. A heat size of tons is used as the basis for the following calculations.

Contratista EPC 5-150 t básica oxígeno industrial horno fusorio BOF

The basis for most refractory bricks for oxygen steelmaking vessels in the U. The penetration of slag and metal between the refractory grains, mechanical erosion by liquid movement, and chemical attack by slags all contribute to loss of lining material. The rate of solution of a refractory by the slag is dependent on its properties. The taphole is generally plugged with material that prevents slag entering the ladle as the vessel turns down.

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This saturates the slag with MgO, thus reducing chemical erosion of the MgO vessel lining.

Although it is possible to operate BOFs with ce hot metal charges, i. All of which makes the purchase and melting of scrap a very complex issue.

Edgar Saldaña –

This process is known as “slag splashing”. The nearby Dolomite Mountains also provided an ideal source of material for basic refractories. The actual percentage of hot metal in the charge is very sensitive to the silicon content and temperature of the hot metal and obviously increases basicp these decrease.

This slag absorbs and retains sulfur and phosphorus from the hot metal. Ladle additives are available to reduce the iron oxide level in the slag but nothing can be done to alter the phosphorus. However, it is clear that Kelly’s “air boiling” process was conducted at such low blowing rates that the heat generation barely offset the heat losses. This information permits an “in course” correction during the final two minutes and better turn-down performance.

Typically a fabric collector, or baghouse, oxiegno use for the collection of these fugitive emissions. A control pulpit is usually located between the vessels. Metallic carbides, nitrides, and magnesium-aluminate spinel form in service at the hot face of the brick filling voids, and adding strength and resistance to slag attack. Obviously the chemical analysis of obsolete scrap is imprecise. Kaiser Industries held the U. Numerous processes for recycling the particulate are in use or under development.

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Once vessel maintenance is complete the vessel is ready to receive the next charge. Through this lance, oxygen of greater than Flat rolled scrap is generally of good quality and it’s impact on the chemistry of BOF operations can almost be ignored.

Despite its high cost, oxygen was used in Europe to a limited extent in the ‘s to enrich the bzsico blast for blast furnaces and Thomas converters. The economics and handling facilities dictate the selection at each shop. In service, the tar was coked and the residual intergranular carbon resisted slag wetting and attack by FeO. BOF heat sizes in the U.

A ton BOF today needs about 20 tons of pure oxygen every 40 minutes. A very high percentage of refractory materials are being produced off shore, with China being the most significant newcomer. The magnesia lime type refractories used in lining oxygen steelmaking vessels are selected mainly for their compatibility with the highly basic finishing slags required to remove and retain phosphorus in solution.

However, with the know-how and capital invested in million tons of open hearth capacity, plans for additional open hearth capacity well along, cheap energy, and heat sizes bzsico by an order of magnitude versus 30 tonsthe incentive to install this untested, small-scale process in North America was lacking. Horbo was also used in the U.