Efficiency of Using Oxygen and Development of Locally Distributed Methods for Afterburning of Combustible Gases in Electric-Arc Furnace or Ladle Furnace

Metallurgist ◽  
2021 ◽  
Vol 64 (11-12) ◽  
pp. 1130-1135
Author(s):  
E. E. Merker
Keyword(s):  
Electric Arc Furnace ◽  
Electric Arc ◽  
Ladle Furnace ◽  
Arc Furnace ◽  
Combustible Gases

scholarly journals Changes in Hydrogen Content During Steelmaking

2015 ◽  
Vol 60 (1) ◽  
pp. 295-299 ◽  
Author(s):  
K. Vrbek ◽  
J. Lamut ◽  
M. Marolt ◽  
M. Knap
Keyword(s):  
Hydrogen Content ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Engineering Industry ◽  
Ladle Furnace ◽  
Arc Furnace ◽  
Measurement Results ◽  
Industry Applications ◽  
Steel Grades ◽  
Steelmaking Technology

Abstract Štore Steel produces steel grades for spring, forging and engineering industry applications. Steelmaking technology consists of scrap melting in Electric Arc Furnace (EAF), secondary metallurgy in Ladle Furnace (LF) and continuous casting of billets (CC). Hydrogen content during steelmaking of various steel grades and steelmaking technologies was measured. Samples of steel melt from EAF, LF and CC were collected and investigated. Sampling from Electric Arc Furnace and Ladle Furnace was carried out using vacuum pin tubes. Regular measurements of hydrogen content in steel melt were made using Hydris device. Hydrogen content results measured in tundish by Hydris device were compared with results from pin tube samples. Based on the measurement results it was established that hydrogen content during steelmaking increases. The highest values were determined in tundish during casting. Factors that influence the hydrogen content in liquid steel the most were steelmaking technology and alloying elements.

Wasteless Joint Processing of Ladle Furnace and Electric Arc Furnace Slags

2021 ◽  
Vol 51 (3) ◽  
pp. 156-162
Author(s):  
O. Yu. Sheshukov ◽  
D. K. Egiazar’yan ◽  
D. A. Lobanov
Keyword(s):  
Electric Arc Furnace ◽  
Electric Arc ◽  
Ladle Furnace ◽  
Arc Furnace ◽  
Joint Processing

scholarly journals On optimization of steelmaking in electric arc furnace and its ladle treatment in ladle-furnace

10.12737/4471 ◽  
2014 ◽  
Vol 14 (2) ◽  
Author(s):  
Aleksandr Kem ◽  
Vladimir Kazartsev ◽  
Eduard Merker ◽  
Denis Harlamov
Keyword(s):  
Electric Arc Furnace ◽  
Ladle Treatment ◽  
Electric Arc ◽  
Ladle Furnace ◽  
Arc Furnace

Coupled modelling of electric arc furnace and ladle furnace processes

2010 ◽  
Vol 37 (3) ◽  
pp. 181-186 ◽  
Author(s):  
G. Straffelini ◽  
A. Gabos ◽  
L. Labiscsak ◽  
D. Bodino ◽  
S. Adinolfi ◽  
...  
Keyword(s):  
Electric Arc Furnace ◽  
Electric Arc ◽  
Ladle Furnace ◽  
Arc Furnace ◽  
Coupled Modelling

scholarly journals Stabilization and Crystal Characterization of Electric Arc Furnace Oxidizing Slag Modified with Ladle Furnace Slag and Alumina

Metals ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 501 ◽  
Author(s):  
Chia-Chun Li ◽  
Chi-Ming Lin ◽  
Yu-En Chang ◽  
Wei-Ti Chang ◽  
Weite Wu
Keyword(s):  
Electric Arc Furnace ◽  
Electric Arc ◽  
Ladle Furnace ◽  
Arc Furnace ◽  
X Ray Diffraction ◽  
Free Lime ◽  
Expansion Test ◽  
Xrd Patterns ◽  
Crystal Characterization ◽  
Furnace Slag

Ladle furnace slag (LFS) is a by-product of a steel plant. As the chemical composition and free lime (f-CaO) content of each batch of slag are significantly different, it is difficult to use the same operation method to recover LFS. In this study, three types of LFS were used to partially replace lime in the dephosphorization process, and the compositions were adjusted to a fixed range by adding Al2O3. This method reduced the effect of different LFS components and significantly reduced the Ca2SiO4 amount (from 31.4% to 17.1%) in the produced modified oxidizing slag. Furthermore, after dephosphorization, the X-ray diffraction (XRD) patterns of the three LFSs indicated transformation into gehlenite and wustite. The modified oxidizing slag f-CaO content was 0.41%, which was lower than that in the electric arc furnace oxidizing slag (1.2–1.4%) and the LFS (0.9–3.4%). In addition, the expansion test results of the modified oxidizing slag showed almost no expansion, which conforms to the ASTM D2940 standards; thus, this material can be used for preparing paving materials. This study provides an approach for LFS treatment that could reduce costs within the steel industry.

scholarly journals Wasteless processing of ladle furnace and electric arc furnace slag

2021 ◽  
Vol 64 (3) ◽  
pp. 192-199
Author(s):  
O. Yu. Sheshukov ◽  
D. K. Egiazar’yan ◽  
D. A. Lobanov
Keyword(s):  
Cast Iron ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Chemical Compositions ◽  
Ladle Furnace ◽  
Arc Furnace ◽  
Actual Problem ◽  
Normative Documents ◽  
Electric Arc Furnace Slag ◽  
Furnace Slag

The actual problem of mineral resources depletion in ferrous metallurgy can be effectively solved by complex reuse of technogenic waste. That waste is mostly presented by EAF (electric arc furnace) slag and LF (ladle furnace) slag. These two kinds of slag have no complex full utilization. The residues of slag are going to the dump and then the slag dump locations pollute the environment. However, the residues of EAF and LF slag can be transformed into the valuable industrial product by interaction of the slag components. This work presents the research for joint wasteless processing of EAF and LF slag with production of Portland clinker and cast iron. The article describes disadvantages of known methods of each slag processing; the paper also shows the significance of LF slag utilization. Design and calculations of the research are presented as well as its experiment methodology. The final results show five chemical compositions for the mixtures, which allow the complex processing of this slag without any waste left. Such processing provides the production of cast iron and Portland clinker both meeting requirements of normative documents. The paper also describes the results of viscosity measurements of slag compositions, the obtained slag phases, and presents the final temperature conditions. The work also considers the results of industrial tests for the developed processing technology and a complete technological chain involving the use of tilt rotary furnaces.

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