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Fantuzzi M.,Tenova LOI - Italimpianti SpA | Malfa E.,Centro Sviluppo Materiali | Scotti M.,Tenaris Group
Revue de Metallurgie. Cahiers D'Informations Techniques | Year: 2010

Tenova started a research program in 2002 for strongly lowering NOx emissions. After the excellent results achieved in the reheating furnaces, the Tenova FlexyTech® burner family was enlarged with the TLX burner whose first application was in the furnace for austenitizing treatment of seamless tubes at TenarisDalmine (2006). The main goals of the revamping were strongly decreasing NOx emissions and increasing the productivity. The results after one year of operation are presented. © EDP Sciences.


Battaglia V.,Centro Sviluppo Materiali S.p.A | Malfa E.,Centro Sviluppo Materiali S.p.A | Fantuzzi M.,Tenova LOI - Italimpianti SpA | Filippini E.,Feralpi Siderurgica SpA
Metallurgia Italiana | Year: 2011

Il presente lavoro descrive il modello matematico sviluppato da CSM, nell'ambiente di calcolo AnsysFLUENT (Computation Fluid Dynamics - CFD), per la simulazione di un forno di riscaldo/trattamento e la validazione condotta attraverso l'applicazione al riscaldo bilette del walking hearth di Feralpi Siderurgica LAM2. Le simulazioni condotte hanno consentito sia l'analisi di dettaglio della termo-fluidodinamica dei gas all'interno del forno che il calcolo del bilancio energetico complessivo e della curva di riscaldo della billetta, dimostrando la potenzialità del modello per la valutazioni di possibili modifiche sia geometriche che legate al sistema di combustione. La conoscenza dei campi di temperature, velocità, e concentrazione delle specie chimiche in prossimità della superficie delle billette hanno permesso inoltre di calcolare la formazione della scaglia attraverso l'accoppiamento con un modello già disponibile presso CSM.


Trademark
Tenova LOI - Italimpianti SpA and Techint Compagnia Tecnica; Internazionale S.P.A. | Date: 2010-12-28

Continuous and discontinuous scrap loaders; machines and lines composed thereof for the production of metal strips; mechanical machines to manage position and stresses in the strip during treatment, namely, steering rolls, tension levelers and loop towers and to manage strips in the production line, namely, reels, electric or gas welding machines, cutters; storage and moving apparatus and machines, namely, power jacks and mechanical and hydraulic lifts; open cast mining, port and yard machines, namely, bucket wheel and chain excavators, surface miners, mobile, semi-mobile and stationary crushing machines and structural parts and components therefor; mobile transfer conveyors and belt wagons in the nature of open and closed belt conveyors and bucket conveyors; mechanical spreaders and cross pit mechanical spreaders; heap/leach systems, namely, copper or other precious metal extraction machines, long distance conveyors, conveyor belts for open and closed belt conveyors, slope conveyor belts for open and closed belt conveyors; transport crawler track loaders, bucket chain continuous and grab type ship unloaders, ship loaders, boom stacking machines, boom bucket wheel reclaimers, namely, ore, coal and other bulk material reclaimers; bridge type bucket wheel reclaimers, namely, ore, coal and other bulk material reclaimers, bridge and portal scraper reclaimers namely, for ore, coal and other bulk materials, barrel reclaimers, namely, for ore, coal and other bulk materials, combined bucket wheel stacker reclaimers, namely, for ore, coal and other bulk materials, circular stockyard systems, namely, stacker, reclaimers, stacker/reclaimers, and conveyors for ore, coal and other bulk materials, tube conveyors, belt conveyors, train loading and unloading machines; vacuum degassing machines, direct reduction reactors, namely, industrial chemical reactors for the production of DRI starting from iron ores and discharged materials from steel-making; pneumatic machines for the handling of hot DRI for the production of ferroalloys, namely, iron, pig iron and steel, for base metal reduction, slag cleaning and alloy refining, calcium recovery plants in the nature of powderisation machines for hot solid ladle furnaces slags to recover secondary metallurgy residues and other calcium containing materials; steel plant production lines, installations and machinery, namely, roll shops in the nature of roll grinders,; handling, loading and automatic storage means for managing rolling stand cylinders, namely, loading and unloading machines; machines and lines composed thereof for the production of insulating material in the nature of glass fibres, rockwool for civil and industrial application; machines and lines composed thereof for the production of glass fibre working as reinforcement; machines and lines composed thereof for the production of automotive glass; machines and lines composed thereof for the production of flat and curved tempered glass for household appliances and architectural furniture; machines and lines composed thereof for the production of stone-based and glass-based fibres, wiskers, bushers, namely, insulation manifold, Chopped strand mats and blankets; fibering machines in the nature of power operated blowers; machines and lines composed thereof for the formation of blankets in glass and mineral fibres; machines and lines thereof for the formation of blankets in glass and mineral fibres, production lines, installations and machinery for the production of tempered glass curved sheets, namely, industrial machine presses, glass sheet tempering machines. Electronic control systems for machines for analyzing fumes, controlling and automatically managing processes and lines of steel plants; electronic control systems for machines for controlling and managing feeding material of furnaces at steel and iron plants; electronic control systems for machines for controlling, conducting and managing heating processes; electronic control systems for machines for controlling polluting gases going into the atmosphere; electronic control systems for machines for control, working and management of steel industry installations, machinery and of grinding machines; electronic control systems for machines for controlling, moving and managing loose material at ports and steel plants and for controlling, moving and managing lines, installations and machinery doing said operations; electronic control systems for Open Cast Mining Equipments, electronic control systems for machines for controlling and managing steel plant materials; electronic control systems for machines for controlling, working and managing lines for the manufacture of superficially and/or thermally treated rolled sections and apparatus to obtain said products; electronic control systems for machines for controlling, moving and managing production lines for glass fibers and stone wool fibers; electronic control systems for machines for controlling, moving and managing lines for the production of tempered and curved glass sheets; installations for transforming, controlling and distributing energy in Electric Arc Furnaces in the nature of transformers; current conductive arms control means, namely, electrical controllers; Electrode position trimming machines in electrode holding arms in the nature of electric capacitors holding secondary arms and laser telemetry devices; installations for managing electric and chemical energy in Arc Furnaces for liquid Steel, Glass and Stone - making in the nature of digital electrode regulators; control systems for the handling of graphite electrodes, namely, electronic control systems for machines; control systems for the moving and positioning of electrodes in steel-making and production of products of glasses, rocks, stone fibers and metals, namely, electronic control systems for machines; in line and off line non destructive measurement and metallurgical characterization instruments for stand cylinders and rolls in the nature of slide calipers, instruments for measuring surface roughness and ultrasound flaw detectors not for medical purposes. Furnaces for the production of melt metals; industrial equipment and related components for the commercial production of iron, sponge iron, cast iron and steel, namely, scrap pre-heaters in the nature of heat exchangers not being parts of machines from hot Off Gasses and cold scraps, rotating hearth furnaces, electric arc furnaces and equipment to reduce environmental impact in the nature of injector and lances to correct local compositions and emissions being structural parts of furnaces; furnaces, reactors and equipment for heating, heat-treatment, calcinating, smelting, cooking, curing, direct reduction of products and materials for the metallurgical industry, namely, industrial heat treatment furnaces, walking beam furnaces, rotary heat furnaces, carburizing furnaces, controlled atmosphere furnaces, Electric Arc Furnaces, ladle furnaces and ladle heating systems in the nature of electric heating elements, ladle furnaces and ladle heating systems in the nature of oil, gas and liquid fuel burners, graphite electrodes baking in the nature of self baking heating elements; gas and liquid fuel furnace burners; industrial furnaces and structural parts therefor; carburizing/decarburization furnaces; equipment, machinery and systems for thermal processing and their parts, namely, structural parts of furnaces and smelting machines in the nature of heat treatment holders, quenching shape stabilizers, quenching systems in the nature of gas refrigerators, liquid and salt quenching tanks and dye systems in the nature of dispenser and furnace charge holders, namely, parts restrainers and holders, cooling pools in the nature of water, oil, salt quenching tanks; Furnaces for the hardening of metal parts and their components; equipment to produce engineered and shielding or vacuum atmosphere for carburizing, nitriding, carbo-nitriding, nitro carburizing, namely, combustion chambers, distillers for the cracking of carbon and nitrogen bearing materials, electrical heating elements, liquid and gas burners; dew point analyzer, namely, industrial de-humidifier; computerized anti-pollution devices and control apparatus for all above mentioned products, namely, gas scrubbers, powder separator for the cleaning and purification of gases, liquids, and air, feed back systems to manage feeding of furnaces as a function of off gasses in the nature of gas regulators; Production lines, installations and machinery for the iron and steel, industry and for the metallurgical industry, namely, primary and secondary steel making furnaces, furnaces, Electric Arc Furnaces, electric submerged-arc furnaces, Electric Arc Furnaces for the treatment of post-steelwork residues, furnaces for the treatment of glass and stones, production lines, installations and machinery for recycling and regeneration of valuable materials from rejection waste, slag, scrap and other regeneration material coming from steel plants, namely, smelter in the nature of Electric Arc Furnaces, ladle furnaces, electric submerged-arc furnaces; pyrometallurgical plants in the nature of electric arc furnaces for the treatment of post-steelwork residues; production lines, installations and machinery for the manufacture of metal strips, namely, heat treatment continuous and batch furnaces, heating furnaces. Building services related to thermal processing equipment, plants, installations and machinery, namely, building construction and installation of machinery and thermal processing equipment; construction planning, namely, planning lay out of plants and working path optimization services; building of equipment, installations and machinery for thermal processing, namely, repair or maintenance of chemical and thermal processing machines and apparatus; installation, fixing and maintenance services related to thermal processing equipment, installations and machinery, namely, installation and maintenance of chemical and thermal processing machines and apparatus; installation, repair and maintenance of power control machines and industrial automation equipment; installation, maintenance and repair of machinery for the metallurgical industry; improvement and adjustment interventions on metallurgical processing lines, namely, maintenance of metalworking and steelmaking machines and tools; maintenance and repair of machinery for Open Cast Mining Equipments. Treatment of materials, namely, metal treatment; planning of processes and installations for treating metals, namely, metal treatment consultation; consultation in the field of custom manufacture of furnaces, furnace burners, and equipment for heating, thermal processing, calcination, cooking, direct reduction of products and materials for the metallurgical industry; consultation in the field of custom manufacture of materials movement machines and metal working and processing machines; metal treatment consultation in the field of heating, thermal processing, calcination, cooking, and direct reduction processes in the field of metallurgy; consultation in the fields of custom manufacture of thermal processing machines and lines composed thereof, glass processing and finishing, and custom manufacture of materials handling machines and lines composed thereof; environmental impact reduction of all listed technologies in the nature of environmental remediation services, namely, consultation in the field of soil, waste, and water treatment services. Scientific and technological services and research and design relating thereto, namely, scientific research in the field of chemistry, Non destructive testing and heat treatment; industrial analysis and research services, namely, industrial research in the field of reduction of environmental impact and reduction of energy consumption, design and development of computer hardware and software; technical and commercial consultancy services, planning, feasibility studies and engineering of industrial plants for the production of iron, sponge iron, cast iron, steel, metal in general, glass in various shapes, material moving devices and their reduction of environmental impact, namely, engineering and technology consultation in the field of metallurgy and Open Cast Mining.


Ageno M.,Tenova LOI - Italimpianti SpA | Fantuzzi M.,Tenova LOI - Italimpianti SpA | Landi A.,Centro Sviluppo Materiali S.p.A | Zanusso U.,Centro Sviluppo Materiali S.p.A
AISTech - Iron and Steel Technology Conference Proceedings | Year: 2010

Many well known potential drawbacks (cost, complexity, control, impact on the product quality, emissions, etc.) which limited a wide diffusion of the regenerative technology are faced by Tenova with specific technological solutions such as the coupling with the flameless technology, the proper choice of the materials and the internal design of the burner (air baffle, gas lances), the control strategy, the design of the furnace. This know-how is derived from more than forty years of experience gained in the design of reheating furnaces installed all over the world and from the continuous R&D development and improvement of the combustion systems. Tenova FlexyTech® regenerative flameless burners combine the advantages of the flameless combustion which allows the lowest NOx emissions level with the high temperature combustion air preheating which allows an important energy saving. The demand of the steel industry for an effective environmental care and a profitable energy saving find a robust answer with Tenova FlexyTech® technology.


Battaglia V.,Enrico Malfa | Fantuzzi M.,Tenova LOI - Italimpianti SpA
AISTech - Iron and Steel Technology Conference Proceedings | Year: 2012

The CFD modelling approach developed by Centro SviluppoMateriali, in the frame of FlexyTech©Tenova project for the simulation of single burners has been extended to the complete reheating furnaces.The main problems to set up the comprehensive furnace model have been approached: the dimension of the computational domain. Taking into account that the main part of the cells used for discrediting the computational domain (50%) are required by in the burners region a procedure has been set up to simplify the burners representation: each burner type used in the furnace has been simulated separately, the profiles of the variable at the burner outlet have been extracted and applied as boundary condition to the complete furnace model. modelling of the steel charge. In principal the heating of charge (billet, bloom, tubes) requires unsteady calculation due to the its advancement inside the furnace and, therefore, very high computation time. The model implemented by CSM iteratively performs the stationary simulation of the fluid dynamic inside the furnace and the un-steady simulation of the charge during its movement in the furnace. The charge model, developed in the AnsysFLUENT© UDF, can be applied to any types of steel charge geometry and handling system. The paper describes the validation of the modelling approaching the case of a complete furnace, 100 t/h walking hearth furnace for billets, equipped with central recuperator and roof burners. The application of the model to analyse the effect of the installation of side flameless regenerative burner in a zone of the same furnace has been discussed, too. Moreover the example of a big rotary heart furnace simulation, equipped with more than 250 burners of FlexyTech© TENOVA family, is reported to underline that the computation time requested by the proposed model is compatible withthe design cycle of reheating furnaces.


Fantuzzi M.,Tenova LOI - Italimpianti SpA
Steel Times International | Year: 2011

Internal R&D projects conducted by Tenova focusing on innovative combustion system technologies which can overcome environmental issues were started in the context of the Tenova FlexyTech® Furnace and led to the development flameless regenerative burners to combine low NOx emissions with reduced fuel consumption. In the FlexyTech research program, Tenova and the Italian research organization Centro Sviluppo Materiali (CSM) used the Design of Experiment (DOE) technique, which reduced the number of field tests and the time taken to market the new products, thus reducing the costs. Flameless technology was the basis of TSX burner development and it has been successfully employed in association with highly preheated combustion air while maintaining low NOx valves. Two different prototype TRGX burners were tested on the CSM Modular furnace and NOx measurements indicate that flameless combustion achieves a decrease of about 60% in NOx emission.


Fantuzzi M.,Tenova LOI - Italimpianti SpA | Aceno M.,Tenova LOI - Italimpianti SpA | Della Rocca A.,Tenova LOI - Italimpianti SpA
SEAISI Quarterly (South East Asia Iron and Steel Institute) | Year: 2012

Following the promising results in terms of low NOx emissions achieved in many reheating furnaces equipped with the Flexy-Tech® Flameless burners, Tenova completed the combustion research program integrating the flameless technology with regenerative systems capable of obtaining a high temperature air preheating. As a result the new family of Regenerative Flameless burners was developed. Honeycombs and ceramic balls beds were considered among the alternatives for a high efficient regenerator technology. The development program was structured into different activities, starting from CFD modeling to laboratory tests and finally long run tests on various industrial furnaces. All these activities demonstrated that Tenova Regenerative Flameless burners achieve a remarkable reduction in NOx emissions (less than 35 ppm with 3% O2 in dry flue gas and furnace temperature 1250°C) coupled with significant energy savings. The application on an industrial RHF and the main results are herein presented.


Carbonaro M.,Tenova LOI - Italimpianti SpA | Fantuzzi M.,Tenova LOI - Italimpianti SpA | Gnemmi S.,Tenova LOI - Italimpianti SpA | Mori C.,Tenova LOI - Italimpianti SpA
Steel Times International | Year: 2010

Tenova's FlexyTech furnace technology TSX with flameless burners provides low NOx emissions, reduced fuel consumption and achieves uniform heating of slab. FlexyTech Level 2 represents one of the Techint Furnace technology kernels, it can be easily integrated into any reheating furnace typology within the existing automation system. It is a computer based system that can be built on several hardware and software platforms, Windows Server, OpenVMS, HP-UX. The furnace is fired with natural gas supplying top and bottom burners and has a nominal throughput of 100t/h when charged with carbon steel slab. Its dimensions are 295m long, 8.1m wide and 1.3-2.0m high and it is fitted with six fixed beams. The combustion system is designed to provide sufficient heat input to maintain the design production levels with a skid insulation loss of 10% (bare pipe). The control of the furnace combustion process is by means of a supervisor program running in the PCs, which constitute the HMI in the control room.


Trademark
Tenova LOI - Italimpianti SpA | Date: 2013-02-05

Furnaces for the production of molten metals. Installation, maintenance and repair of machinery for the metallurgical industry.


Fmf

Trademark
Tenova LOI - Italimpianti SpA | Date: 2016-02-23

Ovens and furnaces; ovens and furnaces for industrial use; induction, electric and gas ovens and furnaces; furnaces for foundries; founding furnaces; melting ovens and furnaces; ovens and furnaces for melting metals; ovens and furnaces for metals recovering. Construction, installation, maintenance and repairing services of ovens and furnaces. Design and development of ovens and furnaces; conducting of technical feasibility studies relating to ovens and furnaces construction; engineering services relating to ovens and furnaces.

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