Tata steel uk looks set to extend the production life of blast furnace bf no5 at its port talbot facility in wales, to ensure it is able to produce steel beyond 2021, according to media reports. Results of ultra high rates of natural gas injection into. It was a dramatic event, but it also had a positive effect, recalls starun. The purpose of a blast furnace is to chemically reduce and physically convert iron oxides into liquid iron called hot metal. Yet the blast furnace had been due to keep producing pig iron for several more months before the next major repair was due. Owater channel isolated stave gets hotter oeventually furnace shell gets hot and cracks occur nonfixed connection stave moves. Fluidity of coal blend should be at lest above 250ddpm dial divisions. Design and maintenance consideration for blast furnace fuel. System for cleaning blastfurnace gas in the blastfurnace.
Rautaruukki company is good at combining process with. Combining the operating data from the jingtang steel plant with established static. By malik mubashir university of the punjab lahore, pakistan 2. Blast furnace production in the ussr is characterized by the use of highly mechanized and automated equipment and advanced technology.
Impact of operational parameters on fuel consumption of a blast furnace. The energy in the furnace gas has been lost in the conventional wetprocess dust collector as the. The furnace is cooled with water running inside part of the case and bricks. Your challenge the conventional blast furnace route is too costly and energyintensive to keep pace with dynamic market changes, where even short and. Blast furnaces are often subjected to extreme physical stress resulting in deterioration of the interior, thus requiring periodic repair. Proposed rule for mandatory reporting of greenhouse gases 1. C, while descending iron oxides are wholly converted to metallic iron walker, 2000. As the mixture of iron ore, coke and limestone heats, the hot waste gases are collected and cleansed. It can be noted that the major share 72% of energy is required during iron making which includes coke making 12%, iron ore sintering 6%, and blast furnaces 54%. The pc injection adopted the concepts and theories of combining oxygen. Efficient and environmentally friendly smelting reduction a vai ironmaking technology. This report presents available information regarding the use of aircooled blast furnace slag acbfs as coarse aggregate in concrete pavements.
Blast refers to the combustion air being forced or supplied above atmospheric pressure in a blast furnace, fuel, ores, and flux are continuously supplied through the top of the furnace, while a hot blast of air sometimes with. Mar 06, 2016 introduction and construction blast furnace. Due to the continuity of steel production, the conveyor system should run continuously. This furnace has an historical rate production of 2. Blast furnace, a vertical shaft furnace that produces liquid metals by the reaction of a flow of air introduced under pressure into the bottom of the furnace with a mixture of metallic ore, coke, and flux fed into the top. The blast furnace is a huge, steel stack lined with refractory brick, where iron ore, coke and limestone are dumped into the top, and preheated air. Rightclicking the center block of any face with a hammer forms the multiblock. Blast furnace trough materials and tap hole clay materials blast furnace trough materials trough mix the flow rate of molten metal and slag through the trough system increase many times in case of larger blast furnaces.
Stack maintenance amts provides a range of services and technical expertise for stack maintenance in blast furnaces. Blast furnaces are similar to furnaces, but can smelt only ore blocks and toolsarmor made of iron, gold or chainmail. R e f r a c t o r i e s f o r b l a s t f u r n a c erefractories for blast furnace 3 the chemical physical properties of the products. Kme staves achieve very high lifetimes due to their good thermal and crystallisation properties. Basically, the blast furnace is a counter current heat and mass exchanger in which rising reduction gas loses most of its heat on the way up, leaving the furnace at a temperature of about 200. For this emergency repair there was no time to reengineer the. Blowing engines are used to provide the air blast for furnaces, blast furnaces and other forms of. Forging furnaces use an open fireplace system and most of the heat is transmitted by radiation. System for cleaning blastfurnace gas in the blastfurnace shop at the vszh koshitse combine. Secondary lead smelter etool smelting blast furnace. Hot blast stoves supply hot blast after heating cold air provided by turbo blowersfans to blast furnace through hot blast main, bustle main, tuyere stocks and tuyeres.
Methods of shutting down a blast furnace ispatguru. Blast furnaces are used continuously and are only shut down when their brick lining needs replacing. However, the price fluctuates significantly based on the type of furnace you buy. Finally, because of the manual approach to define and combine the cycle. Port talbots steelworks will be owned by europes second largest steel firm after metals giant thyssenkrupp agreed to merge with tata. Pdf technological changes in blast furnace iron making. In modern blast furnaces a campaign life of 15 years to 20 years is expected. In 2009 a second partial repair was conducted in order to repair the refractory hearth lining around the tap hole. Technical support document for the iron and steel sector. A method of operating a blast furnace comprising two or more lances that inject reducing agents from a tuyere including injecting a solid reducing agent and a flammable reducing agent from different lances. The system utilised eot crane for removal and placement of slag pot in the furnace pit.
Description of a blast furnace plant main parts of a blast furnace, description and function composition of a charge in the production of pig iron in a blast furnace agglomeration and pelletization of iron ores requirements to individual components of a blast furnace charge time for the study. Furnace gas is a gas which is produced in different types of furnace during the production of metals. Apr 28, 2014 how a blast furnace works the purpose of a blast furnace is to chemically reduce and physically convert iron oxides into liquid iron called hot metal. Fuel injection into the blast furnace as a substitute for expensive coke has become an accepted asset in the art of ironmaking. Indeed ranks job ads based on a combination of employer bids and relevance, such as your search terms and other activity on indeed. Singlestage furnaces have a simple onoff switch that controls the heat theyre either running full blast or not at all. The following overview provides basic information necessary for a proper understanding of the problem of heat transfer.
The report discusses acbfs aggregate production and properties, and the properties of concrete produced with acbfs coarse aggregate. A wettype gascleaning system can remove up to 60% of the zinc and lead in the flue gases of blast. System for cleaning blastfurnace gas in the blastfurnace shop at. Blast furnace an introduction blast furnace is the focus of any integrated steel plant. Basic oxygen furnace bof steel making or basic oxygen furnace steelmaking bos or linzdonawitzverfahren steelmaking or the oxygen converter process is a method in which both molten pig iron and steel scrap are converted into steel with the oxidizing action of. The forging furnace is used for preheating billets and ingots to attain a forge temperature. View and download ussc hotblast 57m owners manual online. Smallvolume blastfurnaces the future of blastfurnace. In the furnace, hot metal along with slag is processed from the raw material which gets collected in the hearth and blast furnace gases come out of blast furnace from the top. The other smelters cast the furnace metal into blocks and allow the blocks to solidify. Community update no 5 blast furnace maintenance port. Firstly sorry for the late at your service is a large collection of videos to fit every. They deliver a very large quantity of air at a pressure lower than an air compressor, but greater than a centrifugal fan. Our technology base covers the entire blast furnace process route from hot blast and raw material handling, through the furnace and casthouse, to gas cleaning and hot metal slag processing.
The gas cleaning system contains two stages, the coarse cleaning system. The major repair in a blast furnace s campaign life is the replacement of the lining. A blowing engine is a large stationary steam engine or internal combustion engine directly coupled to air pumping cylinders. R e f r a c t o r i e s f o r b l a s t f u r n a c erefractories for blast furnace 10 grogastu 1. In the upper part of the blast furnace see figure 1. Blast furnace taphole clay materials refractories with the prevailing trend of increasing capacities of blast furnaces the conditions for applications of taphole clay refractory materials have become more stringent as there has been a significant increase both in the pig iron temperatures and taping durations. We continually monitor the performance of all our plant and equipment to optimise performance. Pdf impact of operational parameters on fuel consumption of. Technological changes in blast furnace iron making in india since last few decades article pdf available in international journal of science and research ijsr 212. This is particularly true of the ironmaking blast furnace which the world steel. Shotcrete installation in the bosch of a blast furnace.
Thirumanam ennum nikkah english subtitles subscene download and convert the movie subtitles for jai lava kusa as. How a blast furnace works twinkletwinklelittlestar. The model decision support system for control of blast furnace. In the combustion heat accumulation phase, heat energy in hot exhaust gas from a burner is accumulated in checker bricks and, in the ventilation phase, a large quantity of air is blown through the checker bricks to raise the temperature of the air. Two large blast furnaces that began their operation in 2009 and 2011 respectively. North american blast furnaces is now about 100 billion cubic feet per year bcfy. The ussr was the world leader in largevolume blast furnace manufacture. In the last instalment we discussed the balance sheet of materials entering and leaving the furnace, showing the dis tribution of the ingredients of the charge and the blast into the various products and byproducts of the furnace.
Blast furnace is used to reduce the iron ore to iron. The blast furnace is a huge, steel stack lined with refractory brick, where iron ore, coke and limestone are dumped into the top, and preheated air is blown into the bottom. It was in the house that a had bought, my question is that he had the fire brick and grates out of it and looking at it it looks. A blast furnace plant does not operate only its own blast furnaces but also a number of preparatory and auxiliary operations with relative autonomy. Consequently, intermediate repair and revamping times must be kept to a minimum.
Pelletizing a pellet plant contains a series of balling drums where the iron ore concentrate is formed into soft pellets, in much the same manner that one rolls a snowball, to make a pellet about the size of a marble between 14 and 12. The purpose of a blast furnace is to reduce and convert iron oxides into liquid iron called hot metal. We did not there go into the question as to how the proportions. Blast furnace tapping operations involve removing the slag and then tapping molten lead from the furnace into molds or ladles. The significance of improving the refractory configuration, the installation methods, and the short turnaround time for the repair will be discussed.
Blast furnaces are used to produce pig iron from iron ore for subsequent. How a blast furnace works introduction the purpose of a blast furnace is to chemically reduce and physically convert iron oxides into liquid iron called hot metal. The charge, which consists of iron ore, coke and limestone etc. The blast furnace is a huge, steel stack lined with refractory brick. Pdf iron and steel making is one of the most intense energy consuming in the industrial sectors. Aug 04, 2011 the purpose of a blast furnace is to chemically reduce and physically convert iron oxides into liquid iron called hot metal. Cast iron staves in the hearth, upper stack and throat five rows of copper staves are installed in the high heat flux zones of the bosh, belly and lower stack a new blast furnace shell means the use of the standard. View and download united states stove hotblast 0 owners manual online. Schedule of a basic oxygen steel plant university of twente. In this paper ironore conveyor system of blast furnace is considered for the preventive maintenance scheduling.
Pdf information modeling system for blast furnace control. The blast furnace is a huge, steel stack lined with refractory brick, where iron ore. Best available techniques reference document on the production of iron and steel december 2001. Slag handling the existing slag handling system from the furnace was cumbersome and presented a continuing threat to smooth operation of the furnace. The blast furnace and its ancillary facilities are very complex and dynamic systems. The iron ore concentrate is now mixed and ready for the pelletizing process. The typical load is 5 to 6 ton with the furnace operating for 16 to 18 hours daily. Blast furnace is the focus of any integrated steel plant. Tata steel uk likely to extend life of port talbot no5 blast. The improved blast furnace is created by placing 27 reinforced blast bricks in a 3x3 cube and placing a hopper on the topcenter block as illustrated.
So by reducing the constituents in blast furnace gas we can increase the calorific value and can be used to generate heat and rise the temperature in any furnace. This continuous run of the blast furnace is known as campaign life. The no 5 blast furnace has been operating at or near full production since the reline in 2009 and last year produced around 2. On this channel you can get education and knowledge for general issues and topics you can sponsor us by sign up by clicking on this link. The blast furnace bfbased ironmaking process accounts for more. Some smelters tap metal directly into a holding kettle which keeps the metal molten for refining. Improved blast furnace official feed the beast wiki. The openhearth furnace ohf uses the heat of combustion of gaseous or liquid fuels to convert a charge of scrap and liquid blast furnace iron to. Tata steel will finance the repair of a blast furnace at britains largest steelworks in port talbot, wales, extending its life by seven years and soothing concerns about its commitment to europe. Up to today, lining materials have been supplied to about 50 blast furnaces in italy and abroad always achieving excellent results and acquiring a solid reputation among the users. A realtime 3d measurement system for the blast furnace burden.
Air heated in the blast furnace stoves, is applied from the bottom of the. As created, the improved blast furnace functions identically and at the same speed as the crude blast furnace. The remaining 25% provides heat at the sinter and coking plants and, in the form of byproduct gas. Since almost 15 years paul wurth umwelttechnik gmbh in essengermany is dedicated to bf and bof gas cleaning. May 06, 2016 europes biggest blast furnace a colossus being made fit for the future made in germany duration. The total energy use distribution 24 by various units of the steel plant coke ovens, sinter plant, blast furnaces, steel shop, rolling mills, and power plant is shown in figure 4. A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals. Experience has shown that the dust content of the gases leaving a blast furnace can be cut by 4 mgm 3 by using a simple and reliable gascleaning system that includes a dust catcher, wet scrubber, venturi tues, valve group, and water separator. Pdf blast furnace ironmaking a view on future developments. The maintenance of hot metal ladles will be done in the slag aisle using 155t crane. Use of aircooled blast furnace slag as coarse aggregate. Improvements in blast furnace operation usually have significant impact on the wellbeing of the company.
Primetals has developed its own dry gas cleaning bag filter technology called merim which. The energy in blast furnace gas in the forms of pressure and temperature is recovered by a trt generator after passing through the dust collector. To get good campaign life special attention must be given to both. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed. A blast furnace is usually built with a steel case and bricks made of magnesium oxide or other refractory material inside the case. Pdf technological changes in blast furnace iron making in. The blast furnace gas can be used to generate heat. Once an item and a fuel are placed into the blast furnace, the block state changes to lit and the item is smelted twice as fast as a regular furnace. Blast furnace recovery and abnormal plant conditions lesson 9 the specific process of conducting a blast furnace recovery gives rise to additional risks significantly over and above normal operational risks. Blast furnace refractory lining and causes of failure. The furnace temperature is maintained at around 1200 to 1250 oc. The principle of blast furnace operational technology and. A blast furnace, after it is blown in and the production of hot metal starts, runs for a large number of years before it is put down for relining. An important role in the development of blast furnace production in the ussr has been played by m.
Expired lifetime application number inventor ueshima kumao nakasono hiroshi. Indeed may be compensated by these employers, helping keep indeed free for jobseekers. High levels of power requirement and rising energy costs present a major challenge to the metallurgical industry. Primetals technologies has provided blast furnace engineering, project excellence and expertise to customers worldwide for over a century. The blast furnace use of high reactivity coke or reduced iron is equal level or over it in. Ofurnace dust enters between gasket and furnace shell and into compensators ocompensator fills with dust and locks stave movements oweld of pipe to stave body fails in fatigue owater leaks into furnace. Therefore, this section is included as an introduction chapter, we can say as a refresher. They are then used to help heat the air blast, required if blast furnace is to reach the high temperatures needed to produce molten iron. Community update no 5 blast furnace maintenance port kembla steelworks, february 2016. A dryprocess dust collector for blast furnace is equipment for cleansing blast furnace gas. A hot blast stove is a facility to supply hot air to a blast furnace continuously. Natural gas use in blast furnace injection has increased substantially in recent years as operators became aware of its operating and economic benefits. Modern blast furnace bf and converter bof gas cleaning a report of stateoftheart technology by franz reufer and christian davidi synopsis. Development of recommendations on the maintenance technologies of blast furnace.
In a short span of seven years, fuel injection has been expanded to 50% of the furnaces in the united states and canada and the types of fuels now include gas, fuel oils, tar, coal, and slurries on a trial basis. Blastfurnace production article about blastfurnace. Fuel is also used at double the rate of regular furnaces, so the number of items smelted per fuel stays the same. Pdf within many industries there is a constant drive to reduce. Blast refers to the combustion air being forced or supplied above atmospheric pressure. Though it has been almost completely replaced by bof and eaf steelmaking in many highly industrialized countries, the open hearth nevertheless accounts for about onesixth of all steel produced worldwide. Stack maintenance allied mineral technical services blast. A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally pig iron, but also others such as lead or copper. In the latter half of the past century blast furnaces with the working volume of 86, 15, 1719, 2002, 2300, 2700, 3200, 5014, 5580 m3 were manu factured. These aggregates increased the productivity and therefore proved the economic benefit of the blastfurnace.
Logicalmathematical evaluation model of blastfurnace melting. Blast furnace simple english wikipedia, the free encyclopedia. Air heated in the blast furnace stoves, is applied from the bottom of the furnace. The gas cleaning system contains two stages, the coarse cleaning system and the fine cleaning system. Stoves are also provided with waste heat recovery system and coke oven gas enrichment facilities, if coke oven gas is available. Maintenance and overhaul of steam turbines wgp42 05.