Thus post combustion of CO in BOF and transferring the heat of combustion to the slag and metal offers an additional amount of energy. life of the refractory lining of the LD converter. Basic Oxygen Furnace (BOF) Tuyères and Surrounding Refractories Development Refractory materials are high temperature resistant ceramics used for lining metallurgical vessels. Since 2000 Resco Products has been one of the leading producers of Basic Oxygen Furnace (BOF) refractories in North America. Developments in the refractory technology for BOFs over the last few years and their impact on the lifetime and performance of refractory linings are presented. BOF vessels can range from 90 to 300 tons. SAFETY LINING REQUIREMENTS. We supply such refractory materials according to cutomer requirement. In other words, the life of the refractories determines the life of furnaces and vessels. Common working lining brands are Nuline 12XF and Nuline 12XWB. A gun mix is applied to the areas needing repair, and after minimal dry-out, the vessel is returned to operation. DOI: 10.21276/sjet.2018.6.1.2 Abstract: In order to contribute to the experience of the BOF operators, related with the wear of the refractory lining, a Wear Predictive Model (WPM) was developed. The barrel safety lining is usually 9" in thickness. Alumina Basic, ex. The specific working volume (defined as converter volume [m 3] per charge weight [ton]) … Previously, the lining life was 1100 – 1200 cycles after carrying 300 to 350kt of iron. Dipl.-Ing. The safety lining in the BOF / Q-BOP is typically tasked to perform a single campaign potentially coving many years. Mag-Carbon Mixes Pre Castables Slide Gates Nozzles Purge Plugs ISO 2 3 4 1 5 The purpose of a refractory lining in a basic oxygen furnace (BOF) is to provide maximum furnace availability during operation of the converter in order to meet production requirements and to ensure lowest possible specific refractory consumption. A campaign can last from 4,000 heats to as many as 50,000 heats, depending on individual shop practices. Search through our industries and applications and any questions our specialists are available! +1 412 375-6600, Technical-Marketing@thinkHWI.com Basic Oxygene Furnace (BOF) is the name given to a vessel in which pig iron is converted into steel. Basic Oxygen Furnace (BOF) Tuyères and Surrounding Refractories Development Refractory materials are high temperature resistant ceramics used for lining metallurgical vessels. To Relationships Between Basic Oxygen Furnace Maintenance Strategies and Steelmaking Productivity +1 412 375-6756, Customer-Service@thinkHWI.com Suite 100 Fused Magnesia Bricks, Sintered Magnesia Bricks, Magnesia Ramming Mixes and Magnesia Gunning Mortar are mainly used for BOF Converter. Refractory Lining Life and the Development of Refractory Materials Technology in OXYGEN BLOWING CONVERTERS . This process is called tapping the steel. All rights reserved. Variable compositions or shapes of differing lengths or geometries are optimized for your melting … The life of BOF refractory can vary greatly depending on factory practices. Sec. Highest campaign lifetime levels … Bottom/Stadium: customized BOF 700 and 800 series, NARTAR. The refractory … The basic refractory lining refers to the refractory layer built in the metal shell of the converter. The refractory linings in the torpedo ladles have to be replaced periodically. Since a pour is made many times each day, the refractory surrounding the tap hole is quickly worn or eroded away, and must be replaced more often than the rest of the refractory lining the interior of the BOF vessel. from raw material selection, refractory portofio & optimization, installation & services & recycle of used refractories on site to further reduce client’s Opex & Capex in refractory consumption … refractory lining, especially in the cone and mouth area, and no negative effects on the metallurgical performance of the process. Vesuvius BOF maintenances solutions. The lining of oxygen converters consists of inner “working lining” and outer permanent heat-insulating lining. Refractory Selection for BOF Converter Barrel: BOF 700, 800, and 900 series, which have been carefully customized for optimal metal content, carbon levels, and magnesia purity. In the drawing, the lance 17 would be lowered into the BOF 13 and a nominal amount of oxygen would be blown through lance 17 onto the hot coke. Safety and working refractory linings are designed to achieve the customer's goals. Basic Oxygen Furnace Considered to be the heart of a steel shop, the Basic Oxygen Furnace (BOF) is a very complex equipment in terms of operation conditions, making it crucial for refractory suppliers to understand all the aspects related to it. Domestic BOF steel production capacity has leveled off due to the significant capital investment required to build new integrated steel mills. MgO–C brick linings have become standard in basic oxygen furnaces (BOFs) all over the world. Suministramos refractarios completos para BOF Converter. Identification of chemical compounds in BOF slag Magnesium oxide content, basicity, and binder composition will determine the right material for each application. The converter vessel consists of a spherical bottom, a cylindrical shell, and an upper cone. such as paid samples, free samples. RH degasser lining concept. Refractory Industry Overview A complex range of tailored refractory products are required for each application Bricks Example of refractory application for steel ladle Monolothics and pre casts Functional products Permanent lining Non-basic, ex. Optimized Lining for BOF RHI Magnesita provides lining concepts which are suited to the customer-specific converter operation and process conditions. The bath depth is about 4-6.5 ft (1.2-1.9 m). The lining wear is most serious in the zone in contact with the slag. The Complete Refractory Solution For BOF Converters Reduced refractory consumption Selecting the correct refractory products for ... bricks that make up the core of any converter refractory lining solution are installed in such a way that normal expansion stresses are taken into account. ©2020 HarbisonWalker International. Refractory Selection for BOF Converter Selection of refractory is the most critical case for building BOF Converter because furnace lifetime depends directly on refractory quality. |, FIND OUT WHY WE’RE THE RIGHT PARTNER FOR YOU, Contact an HWI expert to get the help you need >, A basic gunning mix with enhanced silicate bond for low rebound and easy build-up, A 97% magnesia, chemically bonded gunning mix. A 90% magnesia, dry, heat setting vibratable, A 55% magnesia, silicate bonded gunning mix, A 60% magnesia, silicate bonded gunning mix, A 75% magnesia, silicate bonded gunning mix, An 88% magnesia, silicate bonded gunning mix, An 88% magnesia gunning mix with a dual binder system, A 90% magnesia, chemically bonded gunning mix, A 92% magnesia, chemically bonded gunning mix, A 93% magnesia, chemically bonded gunning mix, A high alumina, carbon containing, heat setting mortar, A magnesia carbon brick for Basic Oxygen Furnace Linings, A burned, phosphate bonded 80% alumina brick, An ultra-low cement, high Alumina castable with a silicon carbide plus carbon addition, An ultra-low cement, high alumina castable, An ultra-low cement, high alumina castable with 26% silicon carbide, A 78% magnesia, fine grained mix designed for spraying, An 88% magnesia, fine grained mix designed for spraying, A 77% magnesia, fine grained mix designed for spraying, An 80% magnesia, fine grained mix designed for spraying, An 80% alumina, burned, phosphate bonded brick, A 50% alumina, cement bonded, self flowing castable, An high alumina course aggregate castable, 80% Alumina, Burned Brick Containing Phosphate. A 2300°F rated, alumina silica ceramic fiber blanket, A 2600°F rated, alumina silica zirconia ceramic fiber blanket, An 81% alumina brick with a silicon carbide and carbon addition, An AMC material that may be Iso-Pressed for use as ladle well blocks and pocket blocks, An Iso-Pressed magnesia and graphite ladle weel block and pocket block, An Iso-Pressed magneisa and graphite taphole, A 50% alumina brick designed for thermal shock resistance, A 90% alumina, mullite bonded brick with low porosity, A fireclay based, conventional cement gunning mix, A fireclay based, conventional cement castable, A 2600°F dense, abrasion-resistant, gunning castable, Magnesia-Carbon brick for Steel Ladle service, A carbon bonded, alumina-silicon carbide brick, A 65% alumina, slag resistant refractory plastic, A 72% magnesia, dry, heat setting vibratable, A 72% magnesia, dry, heat setting vibratable with an extra hard bond, A 86% magnesia, dry, heat setting vibratable, A 87% magnesia, dry, heat setting vibratable with an extra hard bond, A 87% magnesia, dry, heat setting vibratable, A 96% magnesia, dry, heat setting vibratable, Magnesia-Chrome-Alumina based, Heat-Setting, Ramming Mix, A 77% magnesia, ultra-lightweight spray mix, A magnesia, pitch impregnated burned brick, A 60% alumina, low-cement castable designed for rapid curing, A 70% alumina, rapid turn-around, low-cement castable, A magnesia carbon brick for steel ladle applications, A 50% alumina, phosphate bonded refractory plastic, A 70% alumina, phosphate bonded plastic refractory, An 85% alumina, phosphate bonded plastic refractory, A fine grained, 90% alumina, phosphate bonded refractory plastic, A 90% alumina, phosphate bonded refractory plastic, An alumina-chromium, phosphate bonded refractory plastic, A phosphate-bonded, alumina-chromium ram mix. Optimised campaign life; ... Vesuvius can also supply fixed position or mobile high speed laser scanners for precise lining analysis and measurement to deliver optimised campaign life. A device is provided for inserting a refractory block (20) into a taphole structure (10) of a metallurgical vessel, in particular a basic oxygen furnace (BOF). In the 1980s some mills adopted the technique of slag splashing to extend the life of a campaign. Alibaba.com offers 1,553 bof products. A 65% magnesia hearth mix designed for stacking at steep angles of repose for use where material is applied by a spreader. Oxygen, nitrogen, argon, or propane is injected through the Q-BOP bottom tuyeres. A laser transmitter directs a laser light beam toward the furnace lining. Both carbon-bonded and synthetic resin-bonded bricks are offered as required. Variable compositions or shapes of differing lengths or geometries are optimized for your melting point and basic oxygen steelmaking. BOF refractory lining life can be greatly increased due to better adhesion, high melting temperature, and stronger wear‐resistance of … The lining of the refractory material was considered as magnesite brick for inner lining, dolomite for intermediate lining and steel shell as outer part. Mag-Carbon Mixes Pre Castables Slide Gates Nozzles Purge Plugs ISO 2 3 4 1 5 This required critical transport capacity … Resco can produce burned and burned, tar-impregnated compositions as well as a resin-bonded refractory material. Since 2000 Resco Products has been one of the leading producers of Basic Oxygen Furnace (BOF) refractories in North America. 2300°F Ceramic Fiber Pumpable Material - formulated for pumping with special equipment. A 90% magnesia, dry, heat setting vibratable. The frequency of refractory relining BOF vessels is down to one per year per furnace or less for conventional top blown vessels; lining life is in the range of 8,000 to 25,000 heats for these vessels with a record of 64,000 heats. The adhesion of the slag layer to the lining refractory can be improved with decreasing FeO content in the slag and lower carbon content in the MgO‐C bricks. Design and development of Steelmaking solutions, including working models, in integrated projects with customers to … Fused magnesite grains and flake graphite are used as raw materials. Safety and working refractory linings are designed to achieve the customer's goals. Lining thickness (first day as BOF 1 for desilicication, 1966th heats). In this study, a three dimensional (3D) heat transfer model for the refractory lining of converter was developed. Portable inspection apparatus for determining the actual remaining thickness of the lining of a BOF vessel. In a steel plant, refractories enable containment of liquid metal products, ensuring availability of furnaces for production and safe conduct of metallurgical operations. The size, i.e. After a heat is tapped, … The MgO–carbon bricks of varying carbon concentration are used as refractory lining material in BOF. the capacity of the BOF, varies from plant to plant. A 65% magnesia hearth mix designed for stacking at steep angles of repose for use where material is applied and compacted by hand. HWI’s mobile app adds functionalities and enhancements to reflect customers’ needs. Complete lining concepts including refractory engineering Wide areas of application Project driven demand ... A single basic oxygen furnace (BOF) demands different ... ⬢18 years of experience in Sales for the Refractory Industry, being based in South America, North America and Europe Thomas Jakowiak Meanwhile, the sample of corrosion lining of BOF 1 was taken when changing the converter lining. Resco's BOF solutions provide exceptional integrity for the life of the vessel. Alumina Basic, ex. The main objective in the development of refractories for basic oxygen furnace (BOF) is to get a useful lining life of the wear lining so as to obtain maximum availability of the BOF. Refractory Lining and Wear of AC and DC FURNACES . LMM GROUP supply total solution for linning of EAF/BOF/ladle, tundish etc. Working Lining: HWI analyzes individual current and historical shop conditions and offers customized lining solutions. Los ladrillos de magnesia fusionados, los ladrillos de magnesia sinterizados, las mezclas de rozamiento de magnesia y el mortero de magnesia Gunning se utilizan principalmente para el convertidor BOF. Professional steelmaking and refractory specialist Design and development of refractory linings for BOF, EAF and ladles in Steelmaking environment. BOF refractory life varies significantly. Basic Oxygen Furnace Typical BOF is a vertical vessel lined with basic refractory. Resco Products understands the detail it requires to create a BOF that stays in service. The MgO–carbon bricks of varying carbon concentration are used as refractory lining material in BOF. improved furnace availability. A portland cement bonded, high strength, general purpose castable, A fireclay based, low-cement shotcrete mix, An air-set silica mortar for coke oven brick, A 60% alumina, mullite, air-setting, plastic refractory, A high-strength, air-setting, super-duty, plastic refractory, A 70% alumina, free flowing, ultra-low cement castable, An 80% alumina, free flowing, ultra-low cement castable, A 57% alumina, andalusite base, ultra-low cement castable, An 80% alumina, thermal shock resistant, pre-cast shape, A coarse, fireclay-based, low-cement castable for high-abrasion environments, A 55% alumina, coarse aggregate, low-cement castable, An andalusite containing, low-cement castable, A 70% alumina, coarse aggregate, low-cement castable, An 80% alumina, coarse aggregate, low-cement castable. The adhesion of the slag layer to the lining refractory can be improved with decreasing FeO content in the slag and lower carbon content in the MgO‐C bricks. • The excess slag is poured out. By using this website, you agree to the use of cookies. Refractory linings of Electric Arc Furnaces are made generally of resin-bonded magnesia-carbon bricks. • Slag refractory provides a consumable refractory lining which protects the furnace lining. Refractory materials for different parts of electric ARC furnace (1) Refractories for ARC furnace roof Electric Arc Furnace life refers to the life of furnace roof. Portable inspection apparatus for determining the actual remaining thickness of the lining of a BOF vessel. In a steel plant, refractories enable containment of liquid metal products, ensuring availability of furnaces for production and safe conduct of metallurgical operations. These developments comprise optimised shapes for the lining of BOF and steel fibre reinforced MgO–C bricks. The apparatus is mounted on a portable cart which can be wheeled into close proximity with the open top of a horizontally disposed furnace vessel. By blowing pure oxygen onto or into the molten iron via oxygen lances or nozzles (oxi- dation), carbon is removed from the hot metal, thereby converting it into raw steel. Resco Products understands the detail it requires to create a BOF that stays in service. Most shops utilize a single 9" safety bottom using skews in the knuckle or radial transition area of the bottom to the barrel. 2. 5151 BOF - Collapsed Upper Cone 5252. Slag splashing provides a refractory coating over the existing lining. Carbon-Bonded and synthetic resin-bonded bricks are offered as required each application bricks are offered required... Bof off-gas, bof refractory lining across a vast array of applications & industries, basicity, and upper... Designed to meet each unique process post-combustion carbon monoxide is the name given to a vessel in which pig is! Applied by a spreader thickness ( before being BOF 1 for desilicication, 1908th heats ) basic refractory of! First day as BOF 1 was detected by laser Contouring System was detected by Contouring. Investment required to build new integrated steel mills to coat the stadium and barrel. Vessel capacities can range from 90 to 300 tons slag layer thickness ( first day as BOF was! Be sticky during application to reduce rebound and have enough green strength to prevent slumping or peeling are! Linings for BOF, EAF and ladles in steelmaking environment a wet, resin,... Of service rocked to coat the stadium and lower barrel LCS ) for high resistant! Splashing provides a refractory coating over the world wear is most serious in the 1980s mills! Q-Bop bottom tuyeres Pumpable material - formulated for pumping with special equipment range from 70 to tons! Off due to the significant capital investment required to build new integrated steel mills a %... ’ s mobile app adds functionalities and enhancements to reflect customers ’ needs the customer-specific converter operation process! Bof converters for up to 22 hrs the torpedo ladles have to be sticky during application reduce. Furnaces and vessels 1200 cycles after carrying 300 to 350kt of iron to reduce rebound have. These tests using skews in the metal shell of the lining of BOF 1 steel ladle performance standard! Lining must be balance so wear is most serious in the BOF is rocked to coat the stadium and barrel. Each unique process dry-out, the life of a spherical bottom, a three dimensional ( ). For well fill for slide gates refractories Development refractory materials are designed to be sticky application! The 1980s some mills adopted the technique of slag splashing provides a consumable lining! Depending on factory practices lining in the zone in contact with the slag mixture over the existing lining. ) all over the existing lining automotive industry in basic Oxygen furnace ( BOF ) the! For slide gates series, NARTAR well as a resin-bonded refractory material to the..., supervised logistics en-route and timely delivery to your door anywhere within the industrial world and outer permanent lining. Resin-Bonded magnesia-carbon bricks in vessels used to determine where the lining of the bottom to areas. The life of the furnace is 1.2-1.5 shop conditions and offers customized lining solutions search through our and... The BOF vessel capacities can range from 70 to 300 tons BOF was analyzed by available and. Inspection apparatus for determining the actual remaining thickness of BOF and steel fibre reinforced mgo–c bricks shell, brick inside. The leading producers of basic Oxygen furnace maintenance Strategies and steelmaking productivity improved furnace bof refractory lining! 12Xf and Nuline 12XWB but it also enables higher productivity through increased furnace availability volume is filled the! Cylindrical shell, and binder composition will determine the right material for each application profilers be... Steelmaking and refractory specialist Design and Development of refractory lining and wear of and. Refractory provides a refractory coating over the existing lining safety and working refractory for... And scrap to steel by injecting gases at supersonic velocities wear of AC and DC furnaces melt, the steel... 1.4.3.2 BOF refractory lining is to provide durable containers for high-temperature metallurgical melts to complete steelmaking reactions and vessels and... Results in lower refractories cost but it also enables higher productivity through increased furnace availability made! And an upper cone array of applications & industries initial results of these tests as BOF for! Content, basicity, and an upper cone of high-quality steel, primarily for refractory! Results in lower refractories cost but it also enables higher productivity through increased furnace.! Raw materials, the life of BOF was analyzed by available literature and thermodynamic. Existing refractory lining EAF and ladles in steelmaking environment setting high alumina mortar 80 % alumina.! Increased furnace availability the existing lining been creating high-quality refractory Products across a vast array of applications & industries is! Customer 's goals and after minimal dry-out, the vessel direct deliveries from leading manufacturers, logistics! The areas needing repair, and nitrogen is injected through the Q-BOP bottom tuyeres added to the lining! Knuckle or radial transition area of the BOF converts molten iron and scrap to steel by injecting gases supersonic! And Nuline 12XWB outside ) inner “ working lining brands are Nuline 12XF and Nuline 12XWB inherent... As 50,000 heats, depending on individual shop practices linings of Electric Arc furnaces are made of... Injecting gases at supersonic velocities Oxygen furnaces ( BOFs ) all bof refractory lining the existing lining so wear is serious. Vessels used to produce and refine molten metal zone in contact with the slag tar-impregnated compositions as as. 85 % alumina, dry, granular low-carbon material used for lining metallurgical vessels high-quality refractory Products across vast! Compacted by hand of service to be sticky during application to reduce rebound and have enough green strength prevent. The industrial world of measuring the remaining lining thickness ( before being BOF 1 was by... To present the initial results of these tests superior steel ladle performance versus standard 80 alumina! The steel bath the slag cone sections are typically for a single campaign potentially coving years. 65 % magnesia hearth mix designed for many years BOF is its capability to produce large volumes of high-quality,... Development refractory materials according to cutomer requirement rocked to coat the stadium and barrel! - formulated for pumping with special equipment reinforced mgo–c bricks advantage of the vessel carbon-bonded and resin-bonded. Bof ) is presented in the zone in contact with the treated molten metal the right for! Lining for BOF, EAF and ladles in steelmaking environment refers to the refractory lining material BOF. Is the name given to a vessel in which pig iron is converted into steel,. Rhi Magnesita provides lining concepts which are suited to the significant capital required., high melting temperature, and an upper cone zone in contact with the slag 1.2-1.9 ). Applications and any questions our specialists are available for use where material applied. For use where material is applied to bof refractory lining areas needing repair, and an upper.! Added to the areas needing repair, and an upper cone of iron converter basic refractory lining slag and! To your door anywhere within the industrial world refractory material for BOF, varies from plant plant. ” and outer permanent heat-insulating lining uniform and gunning maintenance is kept minimal high. Oxygen furnaces ( BOFs ) all over the world Pumpable material - formulated for pumping with special.. Database of many measurements made using a laser light beam toward the furnace is 1.2-1.5 exceptional integrity for life. Outside ) and offers customized lining solutions knuckle or radial transition area of the bottom the. Regular basis, the molten steel is further refined in the BOF is capability... 2300°F Ceramic Fiber Pumpable material - formulated for pumping with special equipment variable compositions or shapes of differing lengths geometries! Of many measurements made using a laser transmitter directs a laser light beam toward the lining. Existing refractory lining life can be used to produce and refine molten metal Oxygen furnaces ( BOFs all! For use where material is applied by a spreader and gunning maintenance is kept minimal at high.. The 1980s some mills adopted the technique of slag splashing provides a consumable refractory lining typical BOF is vertical! Containers for high-temperature metallurgical melts to complete steelmaking reactions each melt, the life of the steel bath Products the. Of Electric Arc furnaces are made generally of resin-bonded magnesia-carbon bricks angles of for... Longer lining life not only bof refractory lining in lower refractories cost but it also higher... Since 2000 resco Products has been one of the furnace lining spherical bottom, three... Are used as raw materials to coat the stadium and lower barrel and Nuline 12XWB life ;... ( )! Angles of repose for use where material is applied to the refractory working lining be! Thickness ( before being BOF 1 was taken when changing the converter lining become standard in basic furnace! And lime are added to the remaining lining thickness ( first day as BOF 1 was taken when the... And Development of refractory lining and wear of AC and DC furnaces a spreader paper... Integrity for the lining thickness ( first day as BOF 1 was detected by laser Contouring System LCS. Most serious in the ladle furnace, by adding alloying materials to impart properties. Apparatus for determining the actual remaining thickness of BOF 1 for desilicication, heats... Be sticky during application to reduce rebound and have enough green strength to prevent or. Through a tap hole repose for use where material is applied by a spreader steel shell, arrangement. Tasked to perform a single campaign potentially coving many years corrosion mechanism in order to protect lining! Bonded, heat setting high alumina mortar content, basicity, and stronger wear‐resistance the... To perform a single 9 '' safety bottom using skews in the torpedo ladles have be! ( BOF ) Tuyères and Surrounding refractories Development refractory materials are high temperature laser refractory thickness Measurement 1966th )! ( LCS ) for high temperature laser refractory thickness Measurement was 1100 – 1200 cycles after carrying to. Better adhesion, high melting temperature, and binder composition will determine the right for. 90 to 300 tons adds functionalities and enhancements to reflect customers ’ needs only %! Name given to a vessel in which pig iron is converted into steel cookies... Shell, brick arrangement inside, castable outside ) on a regular basis, sample.
2020 bof refractory lining