Tenova HYL


Tenova HYL

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Duarte P.,Tenova HYL | Scarnati T.,Tenova HYL | Martinis A.,Danieli and C. officine Meccaniche SpA
MPT Metallurgical Plant and Technology International | Year: 2013

The Energiron HYL direct reduction technology developed jointly by Tenova and Danieli eliminates the need for an external gas reformer by carrying out the reforming, reduction and carburization reactions within the same furnace. The resulting direct reduced iron (DRI) product is highly metallized and with comfortable carbon levels. This in turn leads to a better reduced iron product for making steel in an electric arc furnace meltshop or other steelmaking unit. By taking advantage of the pressurized operation, resulting in smaller plant and equipment size as well as increased process dynamics, the Energiron process actually uses fewer raw materials per/t of DRI produced. At the same time, the DRI is unique in that it contains the highest levels of carbon content in the form of iron carbide. In addition to the savings on the DR plant side, it is easy to see that the combination of the Energiron process at high pressure, producing DRI of the highest quality and carbon content, allows steelmakers to produce high-quality steel at significant cost advantages.

Duarte P.E.,Tenova HYL | Becerra J.,VP Commercial and Projects | Lizcano C.,Tenova HYL | Martinis A.,Danieli and C. officine Meccaniche SpA
Steel Times International | Year: 2010

Energiron is a new brand that has emerged from the alliance between Tenova HYL, Techint and Danieli. The Energiron process is a development of HYL's ZR self-reforming process, developed to allow reduction of iron ores in a shaft furnace without external gas reforming equipment. Reducing gases are generated in-situ in the reduction reactor, feeding natural gas as make-up to the reducing gas circuit and injecting oxygen at the inlet of the reactor. The basic Energiron Direct Reduction Ironmaking (DRI) scheme permits the direct use of natural gas. Energiron plants can also use the conventional steam-natural gas reforming equipment, which provides increased productivity from the plant. Carbon in the DRI is mostly present as iron carbide (Fe3C) and the level of carbon is adjusted by controlling the composition of the reducing gas and oxygen injected. Hot DRI feed provides additional sensible heat to the EAF, reducing power consumption further as well as tap-to-tap time, which is reflected in a productivity increase.

Martinis A.,Danieli and C. officine Meccaniche SpA | Pauluzzi D.,Danieli and C. officine Meccaniche SpA | Duarte P.,Tenova HYL
AISTech - Iron and Steel Technology Conference Proceedings | Year: 2016

The depressed situation of steel market is forcing to improve steelmaking performances. This leads to develop technologies focused on production of high quality steel at economic and sustainable way. In areas where natural gas is available at low cost, electric steelmakers can optimize product quality, production cost and emissions reduction by using DRI as feeding material. This paper presents the latest achievements obtained in increasing the DRI quality. The latest operating data from Energiron plants show how electrical energy consumption is reduced and liquid steel production is increased by maximizing the DRI energy, both in terms of its physical (feeding temperature) and chemical (carbon content) enhanced properties. © 2016 by AIST.

Duarte P.,Tenova HYL | Martinez J.,Tenova HYL | Morales J.,Tenova HYL | Martinis A.,Danieli and C. officine Meccaniche SpA
AISTech - Iron and Steel Technology Conference Proceedings | Year: 2016

The benefits of producing steel through the DR-EAF configuration, as compared to the integrated BF-BOF route regarding CO2 emissions, are by now well known. In general the carbon footprint of a DR-EAF plant is about 50% of that of an integrated mill; however, among available DR technologies, the ENERGIRON ZR scheme is characterized not only by 45% less CO2 emissions vs. competing technologies, but also has the possibility to further increase CO2 capture up to 90%, and its inherent commercialization as a valuable by-product. In connection with other emissions from the plant, specifically total solids particulates (TSP) and NOx, the parameters are low enough to comply with all worldwide environmental regulations without the need of special and costly treatment systems. This is because the ZR scheme is characterized by high operating pressure, which is reflected in low gas velocities (less fines carry-over) and fully optimized energy integration, thus eliminating the need for huge energy recovery systems and preventing fuel air preheating with high flame temperatures. © 2016 by AIST.

Suttitam N.,Tenova HYL
SEAISI Quarterly (South East Asia Iron and Steel Institute) | Year: 2013

The Office of Industrial Economics (OIE) in association with The Iron and Steel Institute of Thailand had together conducted the study about strategies and measures to promote the usage of steel structures particularly with pre-engineered steel system. Such cooperation is aimed at studying along with analyzing the strength, weakness, opportunity and threat of Thai's steel construction industry in order to promote the usage of pre-engineered steel for the construction industry in Thailand. For this project, the research team selected typical bridge structures in Thailand as the project's case studies to analyze the total cost of construction. The reason why bridges are considered proper samples is because they represent the basic fundamental infrastructures that affect the quality of lives and well beings of general population. Since the government owns the majority of the bridges in Thailand and that most bridges are constructed using concrete, it is extremely imperative that the government has to consider the total cost of ownership rather than the cost of construction based solely on its accounting cost. More importantly, the construction of bridges is relatively simple, which help eliminate bias (advantages) on the comparative cost analysis and assessment between concrete and preengineered steel structures.

Scarnati T.,Tenova HYL
MPT Metallurgical Plant and Technology International | Year: 2011

The world's first Energiron ZR micro-module is in full operation at Gulf Sponge Iron, LLC in Abu Dhabi, UAE. This new plant is designed to produce 200,000 t/year of highly metallized, high- carbon direct reduced iron (DRI). The concept is an Energiron ZR plant configuration without gas reformer and with a compact, efficient plant design to produce DRI of at least 94% metallization and carbon typically around 3.6%. The module offers more capacity, clean operation, higher quality, higher commercial prices for the product since demand is greater, and is an investment which will pay for itself in a few years. The plant includes as main units the DR reactor, process gas heater, recycle gas compressor, cooling gas ejector, CO 2 removal system, water systems, material handling system and distributed control system (DCS).

Duarte P.,Tenova HYL | Becerra J.,Tenova HYL
Stahl und Eisen | Year: 2015

Optimum carbon content in DRI has always been a topic for debate. As the DRI-EAF route for steel production intensifies worldwide, the DRI quality requirement is of most importance for both DR plants and EAF operations. Carbon is not only a source of energy for steel production but is also necessary for the proper and optimized operation of the EAF. The form in which carbon is present in the DRI, free or as iron carbide, is reflected in different characteristics and benefits related to stability and energy release; both are discussed in this analysis. High-carbon DRI refers to ≥3.5 % carbon in the DRI, out of which a minimum of 90% is in the form of iron carbide.

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