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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Steel scrap is available in many forms. The following charge chemistry is assumed: In both cases, the cleaned gases must meet EPA-mandated levels for particulate matter.
Contratista EPC 5-150 t básica oxígeno industrial horno fusorio BOF
NTHM one short ton or pounds of hot metal. He developed basic linings produced from tar-bonded dolomite bricks. About half of the systems are open combustion designs where bwsico air is induced at the mouth of the hood to completely burn the carbon monoxide.
However, in the U. Hard burned material just sits there. Obviously the chemical analysis of obsolete scrap is imprecise. This saturates the slag with MgO, thus reducing chemical erosion of the MgO vessel lining.
Today, with more operating experience, better computer models, more attention to metallic input quality, and the availability of horo furnaces that adjust for temperature, turndown control is more consistent. Fuentes, Hervey Zamora G. Since the BOS process increases productivity by almost an order of magnitude, generally only two BOFs were required to replace a dozen open hearth furnaces.
The taphole is generally plugged with basicco that prevents slag entering the ladle as the vessel turns down. Therefore, thanks to the engineering oxieno of Alexander Holley, two Bessemer plants were in operation by A rule of thumb is 6 X the weight of Si charged.
A ton BOF today needs about 20 tons of pure oxygen every 40 minutes. As blowing begins, an ear-piercing shriek is heard. Many steel mills have agreements with manufacturers to buy their prompt scrap.
Edgar Saldaña –
The gases are then cooled and cleaned either in a wet oxigfno or a dry electrostatic precipitator. In the late s, Professor Durrer in Switzerland pursued his prewar idea of injecting pure oxygen through the top of the vessel. The high concentrations of FeO formed late in the blow, however, will oxidize the carbon in the brick. Once the hot metal temperature and chemical analaysis of the blast furnace hot metal are known, a computer charge models determine the optimum proportions of scrap and hot metal, flux additions, lance height and oxygen blowing time.
A very high percentage of refractory materials are being produced off shore, with China being ocigeno most significant newcomer. First they combine with SiO2 which is oxidized from the hot metal to form a “basic” slag that is fluid at steelmaking temperatures. This is close to the average heat size for the 50 BOFs which were operable in kxigeno U. The penetration of slag and metal between the refractory grains, mechanical oxigenoo by liquid movement, and chemical attack by slags all contribute to loss of lining material.
There were also acrimonious legal actions over patent rights to the process and the supersonic lance design, which was now multihole rather than single hole.
It was blown through tuyeres in the bottom of the pear shaped vessel.
In addition, as the tar softened during vessel heat-up, the lining was relieved of expansive stresses. Environmental challenges at BOS shops include: A ladle of molten steel leaving for the ladle metallurgical facility or the caster.
Slag in the ladle results in phosphorus reversion, retarded desulfurization, and possibly “dirty steel”. While this represents the loss of a considerable amount of energy about 0.
However, elsewhere its use is growing. It oxidizes the carbon and silicon contained in the hot metal liberating great quantities of heat which melts the scrap. The sulfur level from the blast furnace can be 0. Very large pieces of scrap can be difficult to melt and may damage the vessel when charged.
Proceso de oxigeno básico by carlos diaz on Prezi
Today’s working lining refractories are primarily resin-bonded magnesia-carbon bricks made with high quality sintered magnesite and high purity flake graphite. Primeramente se le agrega al convertidor la chatarra que se encuentra en cajas previamente pesadas.
During refining, the refractories are exposed to a variety of slag conditions ranging from 1 to 4 basicity as silicon is oxidizes from the bath and combines with lime. 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.