Castable refractory for furnacerongsheng castable refractory. The furnace is cooled with water running inside part of the case and bricks. Based on a large product portfolio of refractories, seven offers the most integrated approach to blast furnace repairs. As we all know, the furnaces are applied to heat materials and conduct a series of heating process in which there may come out many reactions and newlyformed materials. The furnace is inclined at an angle of 34 degrees from the horizontal, so the burden travels through the furnace by rotation and gravity. The charge, which consists of iron ore, coke and limestone etc. Our procurement department can help you decrease inventory costs, eliminate waste and save time. Us3341188a us460896a us46089665a us3341188a us 3341188 a us3341188 a us 3341188a us 460896 a us460896 a us 460896a us 46089665 a us46089665 a us 46089665a us 3341188 a us3341188 a us 3341188a authority us united states prior art keywords tuyere passageway blast liner means prior art date 19650603 legal status the legal status is an assumption and is not a legal. In the service of blast furnace hot blast stoves the lining and checkerwork fail in individual zones as the result of deformation of the refractories, formation of cracks, and chemical corrosion of the lining under the action of lowmelting dust at high temperatures. Blast furnace is used to reduce the iron ore to iron. Lining refractory an overview sciencedirect topics. A refractory material or refractory is a material that is resistant to decomposition by heat. The refractory lining with stave 3d model in blast furnace is analyzed and design by using the.
Blast furnaces are complex pieces of equipment that involve the transformation, interaction and flow of liquids, solids and gasses at high temperatures throughout the vessel. With todays large blast furnaces, the main trend in hot blast stoves is toward high temperature and pressure ventilation with dome temperature. Pdf the developments of a blast furnace lining and cooling. Finishing end refractory technology reheat furnaces control of pusher furnaces for steel slab reheating using a numerical model. Thereby iron production is divided into two stages. Reliable information about the coronavirus covid19 is available from the world health organization current situation, international travel. Silicon nitride bonded silicon carbide products sialon bonded sic bricks and corundum bricks castable for iron ladle gunning mix for casthouse bakingfree ramming mix for iron runner. The inspection was to observe the conditions of the internal refractory within the five foot diameter. Blast furnace refractory price, 2020 blast furnace. Composed principally of ceramics, refractories are employed in great quantities in the metallurgical, glassmaking, and ceramics industries, where they are formed. Experts from rongsheng kiln refractory factory introduced that in addition to using blast furnace spray paint and blast furnace ramming mass materials, the method of vibration is also used to form iron channel by pouring.
Oct 11, 2016 selection method of refractory lining for different parts of blast furnace published on october 11, 2016 october 11, 2016 19 likes 1 comments. At onex, we offer a wide range of products in refractory materials that range from castables, ceramic fiber products, firebrick and insulating brick, mortars, and plastic refractories. Refractory cement for your foundry furnace can be a real btch. A high quality coke should be able to support a smooth descent of the blast furnace burden with. Protection mechanisms for blast furnace crucible using titanium. Generally, the price of a ton of anhydrous gun clay is 5000 yuan ton. 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. 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. Harbisonwalker international hwi has been keeping the iron and steel industry moving for more than 150 years. Blast furnace modern furnaces are equipped with an array of supporting facilities to increase efficiency, such as ore storage yards where barges are. Best blast furnace refractory for sale in rongsheng. Pdf wear mechanism for blast furnace hearth refractory. The remaining refractory thickness assessment of hearth part.
Furnaces and refractories free download as powerpoint presentation. Dry type gunning material was used in 1990s for blast furnace wall hotrepair, but wettype gunning material shot cast is widely used nowadays due to less rebound loss which leads to less influence on slag and longer life of furnace. The 2 bucks furnace was my first use of an actual refractory formula. Air was blown into a furnace and the height of the furnace was increased. Simple 3d geometry figure 3 shows the geometry that is used for setting up the 3d cfd model. For carboncontaining refractories, good oxidation resistance is required. Pdf monitoring and control of hearth refractory wear to. Having over 80 years of experience in the iron and steel refractory product industry, our vast collection of blast furnace lining refractories are tailored to any application you may require. Provides a large variety of refractory products together with the best value which include blast furnace construction materials such as taphole brick, tuyere, linings for shaft, belly, bosh, bottom, and also consumable materials such as taphole clay, trough castable, and furthermore include refractory construction materials for hot stove. Monitoring and control of hearth refractory wear to improve blast furnace operation. High alumina bricks for blast furnace with super duty. Iron ore processing for the blast furnace courtesy of the national steel pellet company the following describes operations at the national steel pellet company, an iron ore mining and processing facility located on the mesabi iron range of minnesota.
Blast furnace stove dome and hot blast main the quality and composition of iron produced in the blast furnace is directly related to the hearth temperature. A series of thermocouples were installed in the hearth, and the temperature measurements were recorded in a structured query language every minute. In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to. A blast furnace is usually built with a steel case and bricks made of magnesium oxide or other refractory material inside the case. Evaluation and improvement of heat treat furnace model by radhakrishnan purushothaman a dissertation submitted to the faculty of the worcester polytechnic institute in partial fulfillment of the requirements for the degree of doctor of philosophy in manufacturing engineering june 2008 approved. See figure for the latest design installed at corus ijmuiden blast furnace no. The refractory wall lining typically measures two feet or more in thickness and contains more than 2,500 tons of refractories. A world class blast furnace operation demands the highest quality of raw materials, operation, and operators.
Refractory material for copper melting furnace requirements for the use of refractory materials in the induction furnace for melting copper 1, the damage mechanism of refractory material in induction furnace the channel refractory damage is mainly caused by the molten metal, metal oxide, slag penetration and thermal stresses. Typical blast furnace internal hearth 3d geometry no refractory visible. The journal of the southern african institute of mining and metallurgy. Lightweight lw concrete should be a mixture of calcium aluminate cement with aggregates e. As with the 2dmodel, the size and shape of the 3dmodel is modelled according to a real life blast furnace. Refractory, any material that has an unusually high melting point and that maintains its structural properties at very high temperatures. The furnace temperature is maintained at around 1200 to 1250 oc. Castable refractory for furnace refers to the refractory materials applied to the building and fixing of industrial furnaces and kilns. Blast furnace refractory price select 2020 high quality blast furnace refractory price products in best price from certified chinese carbon furnace manufacturers, china furnace suppliers, wholesalers and factory on.
We are one of the largest suppliers of refractories to the us iron and steel industry. For this emergency repair there was no time to reengineer the. May 11, 2017 what is the main process of blast furnace refractory construction. Evaluation and improvement of heat treat furnace model. This makes it critical to carefully monitor the stove temperature. The refractory materials and refractory bricks used in diffreent parts of blast furnace are as follows. Refractory ball for hotblast furnace refractory,firebricks. The blast furnace is a refractory lined circular shaft 100 to 200 feet high, with an internal diameter between 20 and 45 feet. So, it has a long useful life, not react with chemicals in the reactor, and can resist the high temperature not over 1900 celcius degree. Jul 10, 2017 refractory material heat protection of furnace pravendra tomar pt sir iitjee, neet.
In a blast furnace, fuel and ore are continuously supplied through the top of the furnace, while air sometimes with oxygen enrichment is blown into the bottom of the chamber, so that the chemical reactions take place. During the operation of a blast furnace cyanides form in the furnace gases which during shortterm stoppages get into the hot blast tract and the stoves, and tend to destroy the refractory materials. Ajoy kumar nandy in partial fulfillment of the requirements for the award of master of technology degree in mechanical engineering with specialization in thermal engineering at the national institute of. Blast furnace hearth, tuyere surround, bosh, lower stack, upper stack. A blast furnace is a type of metallurgical furnace used for smelting to produce industrial metals, generally iron. The iron lining is lined with periodic slag, molten iron scouring and corrosion, the iron sump is one of the areas where refractory material is consumed in blast furnace production. Furnaces and refractories fusion dust and slag or by the action of alkalies on fireclay refractories, to form alkalialumina silicates.
Blast furnace hearth refractory and coke ash interactions. The iron ore concentrate is now mixed and ready for the pelletizing process. Blast furnaces are lined by carbon and graphite refractory bricks to protect the integrity of the vessel. 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. Current refractory technology and practices in the steel. A modern blast furnace bf is refractory lined to protect the furnace shell from the high temperatures and abrasive materials inside the furnace. Blast furnace refractories blast furnace lining refactory. Service property for refractory is the key effect on the life of blast furnace. My previous furnaces were all made from a clay form surrounded with regular concrete or mortar. What is the main construction process of refractory material. A methodology to investigate the wear of blast furnace hearth carbon refractory lining article in materials and corrosion 6411 november 20 with 295 reads how we measure reads. This page will detail some of the refractory formulas that i experiment with. The typical load is 5 to 6 ton with the furnace operating for 16 to 18 hours daily.
Operating experience of refractory lining in mass burn fired. It was shown that the deformation of aluminosilicate refractories depends not only upon temperature, load, and hold but also to. This video shows the steel mill blast furnace downcomer piping to the dust collector pot. Blast furnace refractory masonry and blast furnace refractory construction, bottomup can be divided into main processes.
The rotary kiln is a revolving horizontal cylinder comprising a shell with an internal refractory lining. Refractory systems iron and steel industry steulerkch. Principles for blast furnace refractory lining inspection and. Installation of refractories in new hot blast stove. Rongsheng is a professional furnace refractory manufacturer that can provide customers with all kinds of quality and cheap refractory materials for furnace lining application. Differentiated use of refractories in blastfurnace hot blast. Hot gas erosion and iron slag erosion are the main reasons for furnace bosh damage, this part of the heat flux intensity, refractory material life not long as long as 1 to 2 months, as short as 2 to 3 weeks, generally used in refractory degree is high, load softening temperature is high and the volume density of refractory material, such as. Blast furnace harbisonwalker international refractory. Temperatures in the blast furnace refractory lining book. Principles for blast furnace refractory lining inspection. Two type of refractory concrete materials are used for lining of heating equipment. Current refractory technology and practices in the steel industry april 26, 2017. Generally, adopt high alumina bricks, fireclay bricks and common carbon brick to build blast furnace lining, which results the short furnace life refractories used in blast furnace mainly include carbon brick, alumina silica refractory and etc. Alumina bubble bricks can be used in the high temperature kilns of metallurgy industry, chemical engineering industry, glass industry, ceramics industry and refractory materials industry.
Refractory products for blast furnace allied metallurgy. Refractory ball owns the characters of high mechanical strength, high chemical stability, and excellent heat endurance. Any material expands when heat ed, and contracts when cooled. Blast furnace refractory video inspection sewer camera. The iron ditch castable is a kind of refractory castable used in the tapping groove of the blast furnace tapping field. To achieve a desired lifetime, the temperature of the lining in these areas thereby proved to be the decisive controllable. 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 cooling of refractory is the essential feature for the blast furnace. Blast furnaces refractory archives kiln refractories blog.
Allied mineral products, formerly riverside refractories, offers a variety of mixes including, gunning, pumping, and shotcrete, for the blast furnace. Numerous and frequentlyupdated resource results are available from this search. Blast furnaces are used to produce pig iron from iron ore for subsequent. Selection method of refractory lining for different parts of. Monitoring the wear of the refractory lining in the blastfurnace hearth. It should be operated not less than 15 years during one campaign. The purpose of a blast furnace is to chemically reduce and physically convert iron oxides into liquid iron called hot metal. The melt was carburized and the manufactured iron ceased to be malleable. Refractory wear and skull growth on the hearth walls and the bottom of the blast furnace have been researched. Refractory ball play the role to support, cover and protect catalyst during various. 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. Refractory bricks for blast furnace of steel industry.
This is to certify that the thesis entitled, heat transfer analysis of blast furnace refractory lining submitted by mr. The hot blast system, incorporating either three or four hot blast stoves per blast furnace, is the other major refractory installation in the blast furnace complex. Particular tolerances, if any, should be indicated at the time of the enquiry and be the subject of tender technical speci. If you dont get the recipe just right, you could have the walls crumble at full temp, or melt into a pile of glass and clay.
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. Blast furnace simple english wikipedia, the free encyclopedia. The forging furnace is used for preheating billets and ingots to attain a forge temperature. The refractory bricks are produced in the great many shapes required for the correct lining of each. The significance of improving the refractory configuration, the installation methods, and the short turnaround time for the. Blast furnace refractory lining campaining life starting of blast furnace to shutting down of blast furnace depend on the life of refractory lining which liesa between the inside working volume to that of outer steel sheel, which protects the steel sheel. As the inventors of comanche, we revolutionized ladle refractory practices.
With over eighty years in combined experience, our technical sales team can assist you with selection of the most suitable crucible for your application. The structural problems of this blast furnace are cracks of the steel shell and thickness reductions of the stave and the refractory of hearth part caused by. Refractory materials are used in furnaces, kilns, incinerators, and reactors. Creating steel from lowgrade iron ore requires a long process of mining, crushing. Furnace bricks are mainly used in blast furnace, hot blast stove, glass furnace, also can be used cement kiln, rotary kiln, lime kiln and so on. Refractory lining of blast furnace a modern blast furnace bf is refractory lined to protect the furnace shell from the high temperatures and abrasive materials inside the furnace.
Price of blast furnace taphole clay taphole clay is a kind of refractory material which must be used in blast furnace taphole. This, in turn, is dependent on the temperature of the hot blast delivered from the. The refractory lining is cooled to further enhance the protection against the dispatch of excess heat that can destroy the refractory lining. How to choose refractory bricks used for different parts of. Refractory materials for industrial furnaces onex, inc. Oclcs webjunction has pulled together information and resources to assist library staff as they consider how to handle coronavirus. Buy furnace brick, furnace lining material from rongsheng to enjoy much more discount. Hampton, new hampshire abstract due to the corrosive environment created in the combustion zone of a massburn refusefired boiler, it is necessary to protect the furnace pressure parts with refractory. The blast furnace body is a huge structure of 50m in height, 20m in width. Coke is the most important raw material fed into the blast furnace in terms of its effect on blast furnace operation and hot metal quality. Your contractorpartner specialized in furnace inspection, installation. Furnace bricks for sale rs refractory bricks manufacturer. Torpedo ladles must ensure safe transport of the pig iron from the blast furnace to the steelworks. In china, where charcoal blast furnaces had been built far earlier than in europe, more advanced refractories were used, but their component systems were very similar to the european qualities.
Trough refractory castable of blast furnace rongsheng. The blast furnace process has been the primary method for producing iron for many decades. Nowadays the campaign life of blast furnace is measured in terms of 10 15 yrs rather than 4 5 yrs. Operating experience of refractory linings in massburn fired waterw all boilers larry strach wheelabrator environmental systems inc. In the steel industry, the blast furnace is a process for making molten iron by melting iron ore. A methodology to investigate the wear of blast furnace hearth. Refractory lining an overview sciencedirect topics. The significance of improving the refractory configuration, the installation methods, and the short turnaround time for the repair will be discussed. Forging furnaces use an open fireplace system and most of the heat is transmitted by radiation. Refractory and ceramic stock a complete range of crucibles in both clay graphite and silicon carbide at our mulgrave warehouse. These minerals are insoluble in iron and can therefore deposit onto the blast furnace hearth refractories after. Wear mechanism for blast furnace hearth refractory lining. Blast furnace has the advantages of large output, high productivity and low cost, which is unmatched by other ironmaking methods. There are four main factors that affect the campaign life of a blast furnace.
Refractory bricks used for different parts of blast furnace. Optimization of refractory lining used in blast furnace a thesis submitted in partial fulfillment of the requirements for the award of the degree of master of technology in mechanical engineering thermal engineering by pramod kumar bhagat 2me3425 department of mechanical engineering national institute of technology rourkela odisha769008, india. Refractory material heat protection of furnace youtube. Pdf wear mechanism for blast furnace hearth refractory lining. Refractory materials for blast furnaces north refractories. The dedicated team consists out of blast furnace technicians, metallurgists and ceramic engineers all having long experience in blast furnace technology and refractory applications. Longer running times and shorter downtimes for new linings or repairs mean that specific solutions are required increasingly often for the refractory lining of blast furnace stacks and runner systems. Blast furnaces have been at the core of sevens activities right from the start, with more than 30 successfully completed projects worldwide in. Monitoring and control of hearth refractory wear to.
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