HORNO BASICO DE OXIGENO BOF PDF

0 Comments

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.

Author: Majora Zolokazahn
Country: Lithuania
Language: English (Spanish)
Genre: Medical
Published (Last): 7 November 2004
Pages: 272
PDF File Size: 17.6 Mb
ePub File Size: 15.39 Mb
ISBN: 867-8-51450-625-8
Downloads: 14581
Price: Free* [*Free Regsitration Required]
Uploader: Kazrakinos

This is close to the average heat size for the 50 BOFs which were operable in the U. It was also used in the U. Suppressed combustion systems offer the potential for recovery of energy, a practice that is more prevalent in Europe and Japan.

A lump of soft burned boc dissolves quickly in a cup of water liberating heat. Obf major categories are “home scrap”, generated within the plant.

While this represents the loss of a considerable amount of energy about 0.

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

Limestone, scrap, and sponge iron are all potential coolants that can be added to a heat that has been overblown and is excessively hot. These slags are required to remove phosphorus and sulfur from the molten charge. The new process was officially dubbed the “LD Process” and because of its high productivity was seen globally as a viable, low capital process by which the war torn countries of Europe could rebuild their steel industries.

This is typically 15 to 20 minutes, and the lance is generally preprogrammed to move to different heights during the blowing period.

The original bricks were tar bonded, where the MgO grains were coated with tar and pressed warm represented a great step forward for the BOS process. Many steel mills have agreements with manufacturers to buy their prompt scrap. Scrap also comes in many sizes, varying chemical hono and a variety of prices.

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

  AL BIDAYAH WAN NIHAYAH BANGLA PDF

Oxieno scrap is available in many forms. The process predated continuous casting. The amount of lime charged depends on the Si content of the hot metal.

The oxogeno concentrations of FeO formed late in the blow, however, will oxidize the carbon in the brick. The BOS has been a pivotal process in the transformation of the U. Obsolete scrap may contain a variety of other objects which could be hazardous or explosive.

The bottom tuyeres used in the Bessemer and Thomas processes could not withstand even oxygen-enriched air, let alone pure oxygen. Section through the BOF vessel during oxygen blowing. None of the above would be significant however, without the improvements in quality and type of basic brick available to the industry.

Steel burns through the plug immediately. The particulate matter captured in the primary system, whether in the form of sludge from wet scrubbers or dry dust from precipitators, must be processed before recycling.

Edgar Saldaña –

The gas is primarily carbon monoxide CO from the carbon in the hot metal. This rate of production made the process compatible with the continuous casting of slabs, which in turn had an enormous beneficial impact on yields from crude steel to shipped product, and on downstream flat-rolled quality.

In addition, as the tar softened during vessel heat-up, the lining was relieved of expansive stresses. Development now moved to neighboring Austria where developers wanted to produce low nitrogen, flat-rolled sheet, but a shortage of scrap precluded open hearth operations.

Soft burned fluxes form slag more quickly than hard-burned, and in the short blowing cycle, this is critical for effective sulfur and phosphorus removal. These properties are directly related to the purity and crystal sizes of the starting ingredients as well as the manufacturing process. As a consequence, ladle sizes remained unchanged in the renovated open hearth shops and ingot pouring aisles were built in the new shops.

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. This slag absorbs and retains sulfur and phosphorus from the hot metal. All of which makes the purchase and melting of scrap a very complex issue.

  ISOTYPE ALLOTYPE IDIOTYPE PDF

Near the end of a campaign, gunning with refractory materials in high wear areas may also be necessary. Because lime in steel slag absorbs moisture and expands on weathering, its use as an aggregate material is limited, but other commercial uses are being developed to minimize the amount that must be disposed.

In many shops residual slag is blown with nitrogen to coat the barrel and trunion areas of the vessel. A control pulpit is usually located between the vessels.

Kaiser Industries held the U. The post combustion of carbon monoxide as it exits the vessel also transmits heat back to the bath. With the ed of continuous casting, the quantity of home scrap has diminished and it is now necessary for integrated mills to buy scrap on the market. However, operation of oxigenoo is costly, and the required information is not always obtained due to malfunctioning of the sensors.

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

The real breakthrough for Bessemer occurred in when Sidney Thomas, a young clerk from a London police court, shocked the metallurgical establishment by presenting data on a process to remove phosphorus and also sulfur from Bessemer’s steel. 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. Ultimately, the cost per ton of steel for brick and gunning repair materials, coupled with the need for vessel availability, dictate the choice of lining.