The converter vessel consists of a spherical bottom, a cylindrical shell, and an upper cone. • The excess slag is poured out. 184.108.40.206 BOF Refractory Lining. 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. Design and development of Steelmaking solutions, including working models, in integrated projects with customers to … Supply and assembly of brick pieces (steel shell, brick arrangement inside, castable outside). Oxygen, nitrogen, argon, or propane is injected through the Q-BOP bottom tuyeres. 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. Standard BOF Operating Conditions in North America and Europe Performance criterion North America Europe Lining life (heats/campaign) 20,000–35,000 2,500–5,000 Slag MgO (wt.%) 10–14 2–7 Highest campaign lifetime levels … Most shops utilize a single 9" safety bottom using skews in the knuckle or radial transition area of the bottom to the barrel. The amount of post combustion taking place in the furnace can be ... • Slag refractory provides a consumable refractory lining which protects the furnace lining. Meanwhile, the sample of corrosion lining of BOF 1 was taken when changing the converter lining. Since 2000 Resco Products has been one of the leading producers of Basic Oxygen Furnace (BOF) refractories in North America. SAFETY LINING REQUIREMENTS. Refractory Selection for BOF Converter such as paid samples, free samples. The new refractory lining of a BOF is usually "burned in" by placing hot coke in the relined furnace and then blowing a nominal amount of oxygen through a lance that has been lowered into the furnace. The size, i.e. 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. Refractory Processing, Refractory Crushing, Refractory Lining, Refractory Construction, Refractory Demolition, Refractory Restoration, Refractory Repair Get In Touch Mahmutbey Mah. The MgO–carbon bricks of varying carbon concentration are used as refractory lining material in BOF. +1 412 375-6724. Typical basic oxygen furnace has a vertical vessel lined with refractory 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. The lining of the refractory material was considered as magnesite brick for inner lining, dolomite for intermediate lining and steel shell as outer part. Refractory linings of Electric Arc Furnaces are made generally of resin-bonded magnesia-carbon bricks. During the blow, the refractory lining of an oxygen converter is under arduous conditions of aggressive slag and iron melt, oxidizing atmosphere and high temperature. 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. We supply such refractory materials according to cutomer requirement. Slag splashing provides a refractory coating over the existing lining. Both carbon-bonded and synthetic resin-bonded bricks are offered as required. Dipl.-Ing. the slag to counteract refractory corrosion also differ from the European approach to BOF steelmaking. Longer lining life not only results in lower refractories cost but it also enables higher productivity through increased furnace availability. After a heat is tapped, … Most shops utilize a single 9" safety bottom using skews in the knuckle or radial transition area of the bottom to the barrel. 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. Learn about the critical work that our engineers and scientists at the ATRC do... Industry advancements have been greatly influenced by the continued development of global economic diversification. 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. VESUVIUS offers a comprehensive range of refractory products for BOF, for primary linings as well as for repairs, that includes seating blocks - blended 98% pure fused / large crystal magnesia 15% carbon, magnesia castable, sleeves - blended 98% pure fused / large … improved furnace availability. Post-Combustion Carbon monoxide is the main component in BOF off-gas. HWI’s mobile app adds functionalities and enhancements to reflect customers’ needs. Resco Products understands the detail it requires to create a BOF that stays in service. The scheme of a Basic Oxygen Furnace (BOF) is presented in the picture. NavigationIndustry HomeIndustry: SteelArgon-Oxygen Decarburization (AOD)Blast FurnaceCoke OvenDegasserDirect Reduced Iron (DRI)Electric Arc Furnace (EAF)FoundryIron LadleLadle FurnaceMiscellaneousReheat FurnaceSlag PotSteel LadleTorpedo Car. The refractory block (20) is carried by a mounting unit (25) and having a proximate end (26), which can be introduced into the taphole. Highest campaign lifetime levels … Dipl.-Ing. 85% Alumina, Dry Press Brick designed for superior steel ladle performance versus standard 80% alumina brick. 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. 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. A wet, resin bonded, heat setting high alumina mortar. This process blasts the slag mixture over the existing refractory lining. The life of BOF refractory can vary greatly depending on factory practices. The aim of this paper is to present the initial results of these tests. Suite 100 Professional steelmaking and refractory specialist Design and development of refractory linings for BOF, EAF and ladles in Steelmaking environment. We offer an integrated refractory solutions for both steel making and rolling production; shaped / not shaped refractory products BOF Lining and repair for EAF/ LF and CCM . 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 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. Dolomite and lime are added to the remaining slag, and nitrogen is injected through the top lance. Key words: refractory lining, basic oxygen furnace, mechanism of wearing, gunning material 1. Optimized Lining for BOF RHI Magnesita provides lining concepts which are suited to the customer-specific converter operation and process conditions. The refractory working lining must be designed to meet each unique process. molten state ready for charging the BOF converters for up to 22 hrs. Magnesium oxide content, basicity, and binder composition will determine the right material for each application. LMM GROUP supply total solution for linning of EAF/BOF/ladle, tundish etc. On a regular basis, the lining is inspected after the vessel has been tapped. +1 412 375-6756, Customer-Service@thinkHWI.com SMS has in total supplied four 120-ton BOF converters with oxygen lance systems, sublance systems, refractory lining devices, converter tilt drives, the maintenance-free lamella suspension systems developed by SMS group and P3S pneumatic slag stopper systems. Identification of chemical compounds in BOF slag 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. 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. Basic Oxygen Furnace (BOF) Tuyères and Surrounding Refractories Development Refractory materials are high temperature resistant ceramics used for lining metallurgical vessels. BOF refractory lining life can be greatly increased due to better adhesion, high melting temperature, and stronger wear‐resistance of the slag layer. +1 412 375-6600, Technical-Marketing@thinkHWI.com Alumina Basic, ex. The MgO–carbon bricks of varying carbon concentration are used as refractory lining material in BOF. Previously, the lining life was 1100 – 1200 cycles after carrying 300 to 350kt of iron. Introduction Wear process mechanism of refractory lining of BOF was analyzed by available literature and by thermodynamic software HSC Chemistry 5.11 from Outokumpu. The BOF converts molten iron and scrap to steel by injecting gases at supersonic velocities. The bottom of the BOF vessel can be designed for many years of service. Slag splashing provides a refractory coating over the existing lining. improved furnace availability. 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. ... Laser Contouring System (LCS) for High Temperature Laser Refractory Thickness Measurement. Common working lining brands are Nuline 12XF and Nuline 12XWB. 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). RH degasser lining concept. 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. 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. Benefits of Vesuvius BOF maintenance solutions. The main function of converter basic refractory lining is to provide durable containers for high-temperature metallurgical melts to complete steelmaking reactions. The bath depth is about 4-6.5 ft (1.2-1.9 m). Vesuvius BOF maintenances solutions. Lining thickness (before being BOF 1 for desilicication, 1908th heats). 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. Professional steelmaking and refractory specialist Design and development of refractory linings for BOF, EAF and ladles in Steelmaking environment. 60,000 heats with one vessel lining have been realized. BOF vessels can range from 90 to 300 tons. 2300°F Ceramic Fiber Pumpable Material - formulated for pumping with special equipment. In a steel plant, refractories enable containment of liquid metal products, ensuring availability of furnaces for production and safe conduct of metallurgical operations. Working Lining: HWI analyzes individual current and historical shop conditions and offers customized lining solutions. Alumina Basic, ex. HarbisonWalker International provides a full range products for every part of the BOF process, including: Gun mixes are used to extend the life of the vessel working lining. The LCS uses a suite of sensors capable of measuring the remaining lining thickness in vessels used to produce and refine molten metal. • The excess slag is poured out. Whereas brick working lining in the ladle wears down and becomes hard to repair, when our monolithic lining wears down the hotface can be recast much more efficiently (including Calderys supply of moulds for this concept). Photo of refractory brick. The multiple tuyeres produce a higher agitation of the steel bath. Fused Magnesia Bricks, Sintered Magnesia Bricks, Magnesia Ramming Mixes and Magnesia Gunning Mortar are mainly used for BOF Converter. The lining of oxygen converters consists of inner “working lining” and outer permanent heat-insulating lining. Only 8-12% of the furnace volume is filled with the treated molten metal. A laser transmitter directs a laser light beam toward the furnace lining. Currently, wear of refractory lining in basic oxygen furnaces for raw steel manufacturing is a factor which exerts a significant influence on the production costs in actual industrial steelmaking plants.
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