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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The most common desulfurizing reagents, lime, calcium carbide and magnesium – used alone or in combination – are injected into the hot metal through a lance.

Numerous processes for recycling the particulate are in use or under development.

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The rate of gas evolution is many times the volume of the vessel and it is common to see slag slopping over the lip of the vessel, especially if the slag is too viscous. Hard burned material just sits there.

After tapping steel into the ladle, and turning the vessel upside down and tapping the remaining slag into the “slag pot”, the vessel is returned to the upright position. The lance is then raised so that the vessel can be turned down towards the charging aisle for sampling and temperature tests.

BOS process replaced open hearth steelmaking. First they combine with SiO2 which is oxidized from the hot metal to form a “basic” slag that is fluid at steelmaking temperatures. This charcoal derived pig iron was low in phosphorus and sulfur, and fortuitously high in manganese which acted as a deoxidant.

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William Kelly dde awarded the original U. Improved Integrated Steel Plant Productivity. The gases are then cooled and cleaned either in a wet scrubber or a dry ooxigeno precipitator.

Once vessel maintenance is complete the vessel is ready to receive the next charge. Since these elements cannot be oxidized from the steel, their content in the final product can only be reduced by dilution with very high purity scrap or hot metal. The lance is water-cooled with a multi-hole copper tip. Companies are being continually acquired and the total number of North American suppliers is greatly reduced.

Slag in the ladle results in phosphorus reversion, retarded desulfurization, and possibly “dirty steel”. The sulfur containing compounds report to oxigenk slag; however, unless the sulfur-rich slag is skimmed before the hot metal is poured into the BOF, the sulfur actually charged will be well above the level expected from the metal analysis.

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Basic Oxygen Steelmaking is unquestionably the “son of Bessemer”, the original pneumatic process patented by Sir Henry Bessemer in This study will focus only on the top blowing variation.

A horho BOF today needs about 20 tons of pure oxygen every 40 minutes. Most European iron ores and therefore hot metal was high in sulfur and phosphorus and no processes to remove these from steel had been developed in the s. While this represents the loss of a considerable amount of energy about 0.

The post combustion of carbon monoxide as it exits the vessel also transmits heat back to the bath. Technical developments over the years include improved computer models and instrumentation for improved turn-down control, external hot metal desulfurization, bottom blowing and stirring with a variety of gases and tuyeres, slag splashing, and improved refractories.

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Limestone, scrap, and sponge iron are all potential coolants that can be added to a heat that has been overblown and is excessively hot. The major categories are “home scrap”, generated within the plant.

The rate of solution of a refractory by the slag is dependent on its properties. After the war, the Germans were denied the right to manufacture tonnage oxygen, but oxygen plants were shipped to other countries. The hot metal is immediately poured directly onto the scrap from a transfer ladle.

However, elsewhere its use is growing. Steel scrap is available in many forms.

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

With the advent of continuous casting, the quantity of home scrap has diminished and it is now necessary for integrated mills to buy scrap on the market. The gas is primarily carbon monoxide CO from the carbon in the hot metal. The metalloids and Mn are oxidized out of the hot metal, the scrap is often coated with Zn which volatilizes, and iron units are lost to the slag, fume, and slopping.

Some scrap may contain oil or surface oxidation. However, operation of sublances is costly, and the required information is not always obtained due to malfunctioning of the sensors.