Oxygen in Acid Electric Steel Production

JOM ◽  
1951 ◽  
Vol 3 (8) ◽  
pp. 601-602
Author(s):  
J. H. Garrison
Keyword(s):  
Steel Production ◽  
Electric Steel

scholarly journals Investigation on the Chemical and Thermal Behavior of Recycling Agglomerates from EAF by-Products

2020 ◽  
Vol 10 (22) ◽  
pp. 8309
Author(s):  
Thomas Willms ◽  
Thomas Echterhof ◽  
Stefan Steinlechner ◽  
Matti Aula ◽  
Ahmed Abdelrahim ◽  
...  
Keyword(s):  
Thermal Behavior ◽  
Raw Materials ◽  
Central Element ◽  
Steel Production ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Electric Steel ◽  
Crude Steel ◽  
By Products

In addition to the blast furnace converter route, electric steel production in the electric arc furnace (EAF) is one of the two main production routes for crude steel. In 2019, the global share of crude steel produced via the electric steel route was 28%, which in numbers is 517 million metric tons of crude steel. The production and processing of steel leads to the output of a variety of by-products, such as dusts, fines, sludges and scales. At the moment, 10–67% of these by-products are landfilled and not recycled. These by-products contain metal oxides and minerals including iron oxide, zinc oxide, magnesia or alumina. Apart from the wasted valuable materials, the restriction of landfill space and stricter environmental laws are additional motivations to avoid landfill. The aim of the Fines2EAF project, funded by the European Research Fund for Coal and Steel, is to develop a low-cost and flexible solution for the recycling of fines, dusts, slags and scales from electric steel production. During this project, an easy, on-site solution for the agglomeration of fine by-products from steel production has to be developed from lab scale to pilot production for industrial tests in steel plants. The solution is based on the stamp press as the central element of the agglomeration process. The stamp press provides the benefit of being easily adapted to different raw materials and different pressing parameters, such as pressing-force and -speed, or mold geometry. Further benefits are that the stamp press process requires less binding material than the pelletizing process, and that no drying process is required as is the case with the pelletizing process. Before advancing the agglomeration of by-products via stamp press to an industrial scale, different material recipes are produced in lab-scale experiments and the finished agglomerates are tested for their use as secondary raw materials in the EAF. Therefore, the tests focus on the chemical and thermal behavior of the agglomerates. Chemical behavior, volatilization and reduction behavior of the agglomerates were investigated by differential thermogravimetric analysis combined with mass spectroscopy (TGA-MS). In addition, two melts with different agglomerates are carried out in a technical-scale electric arc furnace to increase the sample size.

scholarly journals Management possibilities for increasing the electric steel quality

2018 ◽  
Vol 178 ◽  
pp. 08008
Author(s):  
Mihnea Costoiu ◽  
Adrian Ioana ◽  
Augustin Semenescu ◽  
Dragos Marcu ◽  
Massimo Polifroni
Keyword(s):  
Patent Application ◽  
Steel Production ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Electric Steel ◽  
Basic Premise ◽  
Steel Quality ◽  
Technological Advances ◽  
Steel Processing

The article presents the technological advances and modernizations carried out at national and / or world level in the field of increasing the electric steel quality. In this context, conventional complex steel processing methods are analyzed outside the electric arc furnace, in order to increase the electric steel quality. Special non-conventional procedures for the production of quality steels are also presented. The progress achieved in the field of steel production, mainly aimed at increasing productivity and quality, had as a basic premise the "secondary metallurgy" or the treatment of the metal outside the primary production aggregate (furnace or converter). This concept involves transforming the furnace or the converter into a specialized fast-melting aggregate, the rest of the processes specific to advanced steel refining being carried out in pots (which is why the "pot metallurgy" denomination is also used). We will also present in the article a revolutionary concept for the steel production in the electric arc furnace, a procedure which is the subject of a patent application belonging to the authors of this article, applying the pyramid effect for the steel production in the electric arc furnace.

Drying and heating of scrap metal at steelmaking: industrial safety, economics, ecology

2020 ◽  
Vol 76 (12) ◽  
pp. 1353-1258
Author(s):  
V. A. Spirin ◽  
V. E. Nikol’skii ◽  
D. V. Vokhmintsev ◽  
A. A. Moiseev ◽  
P. G. Smirnov ◽  
...  
Keyword(s):  
Energy Efficiency ◽  
High Efficiency ◽  
Steel Production ◽  
Scrap Metal ◽  
Industrial Safety ◽  
Technical Solution ◽  
Metal Charge ◽  
Basic Task ◽  
Scrap Heating ◽  
Winter Time

At steel production based on scrap metal utilization, the scrap heating before charging into a melting facility is an important way of energy efficiency increase and ecological parameters improving. In winter time scrap metal charging with ice inclusions into a metal melt can result in a considerable damage of equipment and even accidents. Therefore, scrap preliminary drying is necessary to provide industrial safety. It was shown, that in countries with warm and low-snow climate with no risk of scrap metal icing up during its transportation and storing in the open air, the basic task being solved at the scrap drying is an increase of energy efficiency of steelmaking. InRussiathe scrap metal drying first of all provides the safety of the process and next - energy saving. Existing technologies of scrap metal drying and heating considered, as well as advantages and drawbacks of technical solutions used at Russian steel plants. In winter time during scrap metal heating at conveyers (Consteel process) hot gases penetrate not effectively into its mass, the heat is not enough for evaporation of wetness in the metal charge. At scrap heating by the furnace gases, a problem of dioxines emissions elimination arises. Application of shaft heaters results in high efficiency of scrap heating. However, under conditions of Russian winter the upper scrap layers are not always heated higher 0 °С and after getting into a furnace bath the upper scrap layers cause periodical vapor explosions. The shaft heaters create optimal conditions for dioxines formation, which emit into atmosphere. It was shown, that accounting Russian economic and nature conditions, the metal charge drying and heating in modified charging buckets by the heat of burnt natural gas or other additional fuel is optimal. The proposed technical solution enables to burnt off organic impurities ecologically safely, to melt down ice, to evaporate the wetness in the scrap as well as to heat the charge as enough as the charging logistics enables it. The method was implemented at several Russian steel plants. Technical and economical indices of scrap metal drying in buckets under conditions of EAF-based shop, containing two furnaces ДСП-100, presented.

Factors Affecting the Decision to Apply Material Flows Cost Accounting MFCA in Thai Nguyen Steel Production Enterprises

2020 ◽  
Vol 36 (3) ◽  
Author(s):  
Nguyen Thi Kim Huyen
Keyword(s):  
Production Process ◽  
Environmental Performance ◽  
Steel Production ◽  
Cost Accounting ◽  
Environmental Accounting ◽  
Production Costs ◽  
Accounting System ◽  
Material Flows ◽  
Factors Affecting ◽  
Legal Documents

Applying the Material Flows Cost Accounting method in Thai Nguyen steel enterprises is one of the solutions to improve the efficiency in the production process, using input materials, and environmental performance, as well as to measure more correctly the production costs based on the change of the price calculation basic. Identifying the factors which affect the decision on applying MFCA to the accounting process of Thai Nguyen steel production enterprises by a direct survey is carried out with 119 accountants and managers working at 13 steel enterprises. The results show that applying MFCA to the accounting process in these enterprises depends on the strategies, capacities, the accounting system of those enterprises, and the system of legal documents related to environmental accounting.

LUKENS HARDWEAR 500F

Alloy Digest ◽  
1994 ◽  
Vol 43 (6) ◽  
Keyword(s):  
Wear Resistance ◽  
Tensile Properties ◽  
Production Technology ◽  
Steel Production ◽  
Carbon Equivalent ◽  
Steel Company ◽  
Armor Steel

Abstract LUKENS HARDWEAR 500F steel was developed from armor steel production technology to have as low a carbon equivalent as possible, consistent with meeting both surface and through-thickness hardness. Uses include truck body liners, bucket lips and conveyor troughs. This datasheet provides information on composition, hardness, and tensile properties. It also includes information on wear resistance as well as forming and joining. Filing Code: SA-476. Producer or source: Lukens Steel Company.

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