Besides, the quality of the high-alloyed steel slag was poor due to its tendency to disintegration, which couldn't be improved by physical treatments. More …
Qixing Yang et al., "AOD slag Treatments to recover Metal and to Prevent Slag Dusting", in Proceedings of The 7th Nordic-Japan Symposium on Science and Technology of Process Metallurgy ...
Qixing Yang, Fredrik Engström, Mia Tossavainen and Mingzhao He: AOD slag Treatments to recover Metal and to Prevent Slag Dusting, Proceedings of The 7 th Nordic-Japan Symposium on Science …
The evolution of non-metallic inclusions (> 10 µm) for the Al-killed steel in the stainless steelmaking is described. The effects of the slag basicity at the AOD/VOD process, Ca treatment, raw materials (dolomite and spent refractory), reoxidation and vacuum condition on the evolution of the non-metallic inclusion were investigated using …
integrating the treatments and steering of slags′ properties to the total process optimization system, the principles of circular ... 25% can be found in AOD slag after the decarburization ...
Therefore, how to effectively treat and use AOD slag has become a hot spot for domestic and foreign attention and research. Yadav [7,8], Ghouleh, and Santos …
The original AOD slag in the cold state contained more than 50 wt% low-hydration activity γ-C 2 S, which significantly affects the hydration activity. Therefore, the effect of the typical crystal stabilizer P 2 O 5 on the formation of a new phase and the enhancement in the mass fraction of high hydration activity β-C 2 S in AOD slag were …
DOI: 10.1016/S1006-706X(13)60078-3 Corpus ID: 137607628; Mechanism and Prevention of Disintegration of AOD Stainless Steel Slag @article{Zhao2013MechanismAP, title={Mechanism and Prevention of Disintegration of AOD Stainless Steel Slag}, author={Hai-quan Zhao and Yuan-hong Qi and Yongkai Shi and Xian-zhao Na and …
the slag characteristics and its variation throughout the process is necessary in order to obtain a better understanding of the AOD process as well as to create better conditions for process control. A few studies have treated different aspects on AOD slags. The melting behavior of AOD slags has been investigated [3],
Argon oxygen decarburization (AOD) slag is the by-product of the stainless steel refining process, which has caused considerable environmental stress. In this work, ... is a seed-borne disease of melons caused by Acidovorax citrulli. Traditional chemical treatments for BFB are ineffective … Expand.
aod slag and stabilizing agents for the laboratory studies A slag sample was obtained at the Avesta Works, after finishing of an AOD heat producing stainless steel of 304 grade, and sent to MiMeR ...
Treatments of AOD slag to produce aggregates for road construction. January 2011. ... the β-C2S mass fraction in AOD slag treated by water cooling at 680 °C reaches a maximum value of 47.5 wt ...
Treatments of AOD slag to Produce Aggregates for Road Construction, Proceeding AISTech 2006, Vol. 1, p 573-583. V ABSTRACT The Swedish steelmaking industry produces large amounts of by-products.
The disintegrating mechanism of the AOD slag was analyzed in detail, and experimental research on prevention of disintegrating of AOD stainless steel slag was developed by adjusting the basicity of the slag and adding the quartz sand and borax. ... Yang Q X, Engström F, Tossavainen M, et al. AOD Slag Treatments to Recover Metal …
Download scientific diagram | Stabilized AOD slag was cooled in slag yard at Avesta Works from publication: Treatments of AOD slag to produce aggregates for road construction | Road Construction ...
AOD slag is a by-product of the secondary refining process of stainless steel using argon-oxygen decarburization process. After natural cooling, AOD slag generally exists as a fine powder with a light gray color, its main chemical components include CaO, SiO 2, and MgO, with mass fractions of 57.72%, 31.69%, and 6.68% [], …
DISSOLUTION BEHAVIOR OF FLUORINE IN AOD SLAG FROM THE PRODUCTION OF STAINLESS STEEL AFTER TREATMENT FOR VOLUME STABILIZATION Qixing Yang1, Fredrik Engström1, Jianli Li2, Anjun Xu2 and Bo ...
EAF and AOD slag aggregates are more dense but more porous than natural aggregates. • Very few mineral phases can show expansive reaction in EAF and AOD slag aggregates. • The use of EAF and AOD slag aggregates improves concrete mechanical properties. • Concretes made of EAF and AOD slag aggregates show a slightly but …
The slag tapped from AOD (Argon Oxygen Decarburization) converter disintegrates, sometimes, during cooling. Slag fines from the disintegration are difficult to handle and to use as materials for co ...
In the AOD process, the primary decarburization slag is reduced and adjusted to higher basicity for desulfurization and after this treatment tapped into a slag pot (single slag practice). In the case of demanding final sulfur target, the reduction slag can be tapped and an additional slag with higher basicity can be formed (2-slag practice).
Therefore, proper treatments have to be conducted in order to improve the usage of steel slag in construction applications. ... Blanpain, B.; Van Balen, K. Effect of accelerated carbonation on AOD stainless steel slag for its valorisation as a CO 2-sequestering construction material. Chem. Eng. J. 2014, 246, 39–52. [Google Scholar]
Qixing Yang et al carried out laboratory tests to treat the AOD slag by water granulation 4, 5. X-ray diffraction analyses of the slag granules obtained from the tests indicated that the high ...
Argon-oxygen decarburization (AOD) is the main process for refining stainless steel. During the AOD process, the composition and properties of the slag undergo great changes owing to changes in ...
The AOD slag was first ground and dried at 378K for 8 h, followed by sieving through a 200-mesh sieve. Then, using deionized water, solutions of NaCl, NaOH, NH 4 Cl, and CH 3 COONH 4 were prepared at 1000 mL each. Different solid-liquid ratio led to different amount of AOD slag in 200 mL additive solution, and the mixture was added to …
AOD process – Stainless production in the AOD converter can be broken into three phases namely (i) decarburization which consists of reduction of carbon level to specification level, control of bath temperature, and additions to adjust heat weight, bath and slag composition, and control temperature, (ii) reduction / desulphurization which ...
The disintegrating problem during the cooling process of AOD stainless steel slag is caused by the 2CaO · SiO 2 phase transformation from α'-C 2 S to γ-C 2 S. By …
By integrating the treatments and steering of slags′ properties to the total process optimization system, the principles of circular economy could be achieved. ... 25% can be found in AOD slag ...
Laboratory treatment tests of AOD slag from stainless steelmaking have been performed by MiMeR. An induction furnace was used for slag reduction tests. The reduced slag was either water granulated ...
AOD is a process for the refinement of iron, nickel, and cobalt based alloys. ... This introduction causes significant agitation and, therefore, intimate slag-metal contact. Through the management of an additional high oxygen partial pressure gas mix and argon, the metal is refined and can reduce carbon levels to 0.01% or lower. Silicon and ...
The disintegrating mechanism of the AOD slag was analyzed in detail, and experimental research on prevention of disintegrating of AOD stainless steel slag was …
Steelmaking plants continuously strive to reduce the environmental load in the steelmaking process, resulting in the recycling of energy, water, and other byproducts. In this chapter, techniques for the treatment and recycling of metallurgical slags are described. Metallurgical slags are considered secondary raw materials and are used or …
Argon Oxygen Decarburization (AOD) converter slags are known to consist of both liquid and solid phases, but limited information on the slag characteristics has been published in the open literature.
Yang Q X, Engström F, Tossavainen M, et al. AOD Slag Treatments to Recover Metal and to Prevent Slag Dusting [C] //... Xiang-yu ZHANG et al. Beneficial Reuse of Stainless Steel Slag and Its Heavy Metals Pollution Risk [J] Research of Environmental Sciences ... The AOD slag naturally falls to a powder on cooling due to its mineralogy. …
SiO 2 and CaO are main components (80% of the total chemical composition). The basicity index of the AOD is 2.3 and around 1.3 for EAF slag aggregates. The mineralogical study was conducted in three steps. First, mineral phases found in EAF slag and AOD slag aggregates were determined through XRD analyses to get an …
AOD slag samples from steel works of Outokumpu Stainless Company were used to study F-dissolution relating to treatments for volume stabilization. Results from the slag tests and sample characterizations indicate that the slag re-melting with or without reduction and granulation with either water or gas have rather small effects on F leaching, as well as …
Estimations of structures and compositions of main compounds in powders of fly ash and AOD-slag and in briquette pieces before and after heat treatments were done by using a S-3700N (Tokyo, Japan) SEM equipped with a Bruker AXS XFlash Detector 4010 (MA, USA) in combination with energy dispersive spectroscopy (EDS).