Constructive and functional modernization of EAF

Ioana, Adrian; Constantin, Nicolae; Moldovan, Petru

doi:10.1088/1757-899x/85/1/012014

Cited by 6 publications

(3 citation statements)

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“…The functional characteristics of the electrical installations that use aggregates for the production and refining of steel, as well as the consumption of electrical energy, depend to a large extent on the electrical conductivity, and respectively the resistivity, of the materials that are found at a given moment in the furnace tank [10][11][12].…”

Section: Introductionmentioning

confidence: 99%

Possibilities of Physical-Chemical Sensors’ Use for Optimizing the Processing of Metallurgical Melting Based on Computer Systems

Ioana

Constantin

Istrate

et al. 2023

Sensors

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This article presents aspects regarding the possibilities of optimizing the quality of the elaboration of metallurgical melts by determining their physical-chemical properties. Thus, the article analyzes and presents methods for determining the viscosity and electrical conductivity related to metallurgical melts. Among the viscosity determination methods, two methods are presented, namely: the rotary viscometer method and the electro-vibratory viscometer method. Determining the electrical conductivity of a metallurgical melt is also of particular importance for ensuring the quality of the elaboration and refining of the melt. The article also presents the possibilities of using and implementing computer systems that ensure the accuracy of determining the physical-chemical properties of metallurgical melts, as well as examples of the use of physical-chemical sensors and specific computer systems for determining the analyzed parameters. The specific electrical conductivity measurements of oxide melts are performed by direct methods (by contact), with Ohm’s law as a starting point. Thus, the article presents the voltmeter-ammeter method and the point method (or the zero method). The novelty of this article is the description and the use of specific methods and sensors for certain determinations (viscosity and electrical conductivity) for metallurgical melts. The motivation here is the presentation of the authors’ research in the addressed field. The article presents an original contribution of the adaptation and use of some methods for determining some physico-chemical parameters, including specific sensors, in the field of the elaboration of metal alloys, with the aim of optimizing their quality.

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Section: Introductionmentioning

confidence: 99%

Possibilities of Physical-Chemical Sensors’ Use for Optimizing the Processing of Metallurgical Melting Based on Computer Systems

Ioana

Constantin

Istrate

et al. 2023

Sensors

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“…Mainly, steel refining in LF aims the following objectives [3], [4]:  To continue steel dezoxidation started during tapping;  To complete steel desulphurization also started during tapping;  To homogenize steel bath thermic and chemically;  To increase steel temperature according to required values for further events;  To adjust the Carbon content and steel alloying;  To eliminate inclusions in flotation in order to reach desired cleanliness;  To modify inclusions shape in order to improve casting process at CCM; Diversification of the refining process for steel aims to ensure a way to continue the metallurgical operations from primary aggregates in secondary aggregates, the process consisting in two stages: primary steelmaking (melting) and secondary steel making, steel treatment outside the furnace [5].…”

Section: Introductionmentioning

confidence: 99%

Steel refining possibilities in LF

Dumitru

Ioana

Constantin

et al. 2018

IOP Conf. Ser.: Mater. Sci. Eng.

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IntroductionAt a basic level, the refining is a purifying process of certain gaseous/solid substances. The word "refining" is commonly used in relation with raw materials. The nature and complexity of liquid steel refining depends mainly by the steel type, meaning steel chemical composition and requiredRefining is a stage of the secondary steel making process which is also referred as ladle metallurgy. The secondary metallurgy concept forced the reorganization of the technological flux. In this way, between primary steel making and steel casting in Continuous Casting Machine, a series of specific installations have been installed one being Ladle Furnace.Mainly, steel refining in LF aims the following objectives [3], [4]:  To continue steel dezoxidation started during tapping;  To complete steel desulphurization also started during tapping;  To homogenize steel bath thermic and chemically;  To increase steel temperature according to required values for further events;  To adjust the Carbon content and steel alloying;  To eliminate inclusions in flotation in order to reach desired cleanliness;  To modify inclusions shape in order to improve casting process at CCM;

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“…This concept consists in a quality-economical matrix (M QE ). The M QE matrix has three main components (vectors) [4,6,7]:…”

Section: Introductionmentioning

confidence: 99%

Elements of the quality management in the materials’ industry

Ioana¹,

Semenescu²,

Costoiu³

et al. 2017

AIP Conference Proceedings

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Abstract. The criteria function concept consists of transforming the criteria function (CF) in a qualityeconomical matrix math M QE . The levels of prescribing the criteria function was obtained by using a composition algorithm for three vectors: T vector -technical parameters' vector (t i ); E vector -economical parameters' vector (e j ) and P vector -weight vector (p 1 ). For each product or service, the area of the circle represents

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Constructive and functional modernization of EAF

Cited by 6 publications

References 1 publication

Possibilities of Physical-Chemical Sensors’ Use for Optimizing the Processing of Metallurgical Melting Based on Computer Systems

Possibilities of Physical-Chemical Sensors’ Use for Optimizing the Processing of Metallurgical Melting Based on Computer Systems

Steel refining possibilities in LF

Elements of the quality management in the materials’ industry

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