aod slag treatments to

The role of P2O5 on the stability of β-C2S in AOD slag based …

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 ...

Mechanism and Prevention of Disintegration of AOD …

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 …

Blog What Is AOD (Argon Oxygen Decarburization)?

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 ...

Briquetting of Wastes from Pulp and Paper Industries by Using AOD …

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).

Carbonation of argon oxygen decarburization stainless steel slag …

This study focuses on evaluating the carbonation potential of argon oxygen decarburization (AOD) slag and analyzing influence mechanism of carbonation on chromium leachability.Static thin-film accelerated carbonation and sequential leaching tests were carried out. Results show that the liquid to solid (L/S) ratio was the most …

DISSOLUTION BEHAVIOR OF FLUORINE IN AOD SLAG …

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 ...

Mineralogical influence of different cooling conditions …

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.

Mechanism and Prevention of Disintegration of AOD Stainless Steel Slag

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 …

Dissolution behavior of fluorine in AOD slag from the …

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 ...

Experimental Study and Modeling of Concrete Containing AOD Steel Slag

The present study evaluated various properties of concrete mixes containing 0–25% of AOD steel slag as a partial replacement of ordinary portland cement and further curing the mixes for 28, 90, 180 and 365 days. Thus, the study investigated the compressive and flexural strengths, abrasion resistance, resistance to acid attack and …

Recovery of chromium from chromium-bearing slags …

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 …

Hazard-Free Treatment and Reuse of Magnesium Slag

Both treatments and leaching tests of an Mg slag sample containing F of 2.15% from an Mg factory in northwest China were conducted in the present study, focusing on problems of F pollutions.

Treatments of AOD slag to produce aggregates for …

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 ...

Mineralogical composition of EAF slag and stabilised AOD slag

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 …

Treatments and Recycling of Metallurgical Slags

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 …

A Review of Circular Economy Prospects for Stainless Steelmaking Slags

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).

The InsPyro-Spark toolbox for slag engineering properties …

Laboratory treatment tests of AOD slag from stainless steelmaking have been carried out by MiMeR, Minerals and Metals Recycling Research Centre, at Luleå University of Technology. The slag was ...

Treatments of AOD Slag to enhance recycling and resource …

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 ...

Methods to Determine Characteristics of AOD-Converter …

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],

Effect of Carbonation Treatment on the Strength and CO

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]

In-Line Co-Processing of Stainless Steel Pickling Sludge …

Stainless steel pickling sludge (SSPS) is classified as hazardous solid waste, while Argon Oxygen Decarburization (AOD) slag is challenging to utilize due to …

Slurry-Phase Carbonation Reaction Characteristics of AOD …

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% [], …

A Review of Circular Economy Prospects for Stainless …

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).

Stabilized AOD slag was cooled in slag yard at Avesta Works

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 ...

Argon Oxygen Decarburization Process – IspatGuru

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 ...

Slag-based silicon fertilizer improves the resistance to …

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.

Stabilization of Stainless Steel Slag via Air Granulation

The role of P2O5 on the stability of β-C2S in AOD slag based …

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 …

Evolution of Non-Metallic Inclusions in Al-Killed Stainless …

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 …

Dynamic changes in slag properties during the reduction stage …

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 ...