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 Grain Size Effect in Elution Test of Electric Arc Furnace Slag

2020 ◽  
Vol 10 (2) ◽  
pp. 477 ◽  
Author(s):  
Alessandro Riboldi ◽  
Giovanna Cornacchia ◽  
Marcello Gelfi ◽  
Laura Borgese ◽  
Annalisa Zacco ◽  
...  
Keyword(s):  
Electric Arc Furnace ◽  
Electric Arc ◽  
Leaching Tests ◽  
Arc Furnace ◽  
X Ray Diffraction ◽  
X Ray ◽  
Lombardy Region ◽  
Electric Arc Furnace Slag ◽  
Test Requirements ◽  
Furnace Slag

In this paper we discuss the effects of deslagging practices and the size of electric arc furnace (EAF) slags on structural, microstructural, composition and leaching tests. The samples were collected from seven steelmakers located in Brescia (Lombardy Region, Italy). Nine granularity fractions of four samples were tested to evaluate the influence of the granularity on the leaching tests. The results showed that, in general, the release of the elements arises when the size of the particle decreases, except in one sample, in which vanadium and zinc displayed the opposite trend. X-ray diffraction results suggest that behavior may be ascribed to the effect of the grinding, which causes a different percentage of the phases in the various fractions. In conclusion, the possible effects of the size should also be carefully considered when defining new leaching test requirements for EAF slags.

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.

scholarly journals Development of High Resistance Hot Mix Asphalt with Electric Arc Furnace Slag, Ladle Furnace Slag, and Cellulose Fibers from the Papermaking Industry

2021 ◽  
Vol 11 (1) ◽  
pp. 399
Author(s):  
Juan María Terrones-Saeta ◽  
Jorge Suárez-Macías ◽  
Francisco Javier Iglesias-Godino ◽  
Francisco Antonio Corpas-Iglesias
Keyword(s):  
Physical And Mechanical Properties ◽  
Cellulose Fibers ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Ladle Furnace ◽  
Arc Furnace ◽  
Bituminous Mixtures ◽  
Electric Arc Furnace Slag ◽  
Furnace Slag ◽  
By Products

Roads are currently essential links of communication and economic development. However, these roads are progressively requiring higher quality materials, implying a greater impact on the environment, in order to withstand the high levels of heavy vehicle traffic. Therefore, this research proposes the use of industrial by-products to create bituminous mixtures which are more resistant and durable than traditional ones. The industrial by-products used, are electric arc furnace slag, ladle furnace slag, and cellulose fibers from the papermaking industry. These by-products were physically and chemically characterized to be used to conform with bituminous mixtures. At the same time, bituminous mixtures were conformed with conventional materials, thus being able to compare the physical and mechanical properties of the conformed mixtures through different tests. The results showed how the use of cellulose fibers made it possible to absorb a greater percentage of bitumen, as well as the use of electric arc furnace slag and ladle furnace slag created mixtures, with greater Marshall stability. Therefore, sustainable, durable, resistant, and high waste mixtures were developed in this investigation.

Effects of fiber material in concrete manufactured with electric arc furnace slag: Experimental and numerical study

2022 ◽  
Vol 316 ◽  
pp. 125553
Author(s):  
Aratz Garcia-Llona ◽  
Vanesa Ortega-Lopez ◽  
Ignacio Piñero ◽  
Amaia Santamaría ◽  
Miquel Aguirre
Keyword(s):  
Numerical Study ◽  
Fiber Material ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Electric Arc Furnace Slag ◽  
Furnace Slag
Sign in / Sign up

Export Citation Format

Share Document