Carbothermic reduction for recycling of iron and chromium …
The distribution equilibrium of Mn between ladle slag and liquid steel during the refining of ultra low carbon Al-Si killed steel was simulated in a LaCrO3 high temperature furnace at 1873K, the ...
Stability of Chromium in Stainless Steel Slag during Cooling …
The chromium elution behavior of stainless steel (SS) slag depends highly on the chromium distribution, and the molten modification process proved to effectively improve the chromium enrichment in stable phases. However, the phase transformation and variation of chromium stability during the subsequent cooling process is still poorly …
Immobilization of lead by application of soil amendment
This paper presents a new soil amendment used for immobilization of soil Pb, produced from vinegar residue, stainless steel slag, and weathered coal. The pH value measuring, granulation and adsorption experiments were carried out to determine the optimal composition of soil amendment. Optimizing soil amendment B2 was composed of …
(PDF) Crystallization Behaviour of Chromium in Stainless Steel Slag
The synthetic stainless steel slag systems with different basicity and different FeO contents were prepared using reagent powders, the crystallization of which was experimented by cooling from ...
Slag recycling in submerged arc welding and its effects on …
Since cladding of stainless steel is an important industrial process and a large amount of slag waste is also generated during this process, it was decided to undertake the present study wherein a technology for recycling of SAW slag generated during submerged arc cladding of stainless steel has been developed.
Recovery of chromium from chromium-bearing slags
As shown in Fig. 4, the stainless-steel production process includes ferroalloy production and stainless-steel smelting processes.In the chain of stainless-steel production, the ferrochromium and ferronickel alloys are the important intermediate products, which are produced by using a submerged arc furnace (SAF) process, so that …
Inhibition Kinetics of Chromium Leaching by Calcite Coating …
Abstract Chromium leaching from stainless steel slag should be dealt with when utilized them as construction materials, an original idea of increasing calcite coating compactness in slag matrix is proposed for solving this problem. The paper originally proposes a carbonation strategy balancing carbon dioxide sequestration efficiency and …
Comprehensive utilization of steel slag: A review
1. Introduction. Steel slag is the main solid waste generated in the steel-making process, accounting for 15 to 20% of crude steel output [1].China's crude steel output in 2021 was 1.035 billion tons [2], more than half of the global crude steel output (1.9505 billion tons) [3], and the steel slag output exceeded 120 million tons.In contrast, …
Stainless Steel Slag Recycling Solution and …
Stainless Steel Slag Recycling Solution and Beneficiation Equipment. April 27, 2021. 10:00 am. Stainless steel slag is divided into dry slag and water-granulated slag. The specific gravity difference …
Slag recycling in submerged arc welding and its effects
A technology for recycling of slag generated during submerged arc cladding of stainless steel was developed. In the present study the effects of process parameters and recycled slag on flux ...
Slag Recycling and Metal Recovery
MEKA is designing and manufacturing customized steel slag processing and metal recovery plants for each project-specific purposes. Our portfolio; MEKA offers stand-alone machines, process solutions, turnkey plants, separation and sorting technology, and control and automation solutions perfectly tailored to individual requirements. DESCRIPTIONS.
The recycling and reuse of steelmaking slags — A review
Abstract. Large volumes of slags are formed as by-products during the refinement of pig iron by basic oxygen steelmaking or electric arc furnace steelmaking. In order to lower the environmental impact of the steel industry and ensure its economic sustainability, there have been significant studies finding the ways to recycle by-products.
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 the leaching toxicity of Cr. This study introduces a novel in-line co-processing technique for AOD slag and SSPS, parallel to the steelmaking process, aimed at metal recovery, …
Review Characteristics of steel slags and their use in cement …
In China, BOF slag accounts for about 70% of the annual steel slag production (Cheng and Yang, 2010).In the BOF process (Fig. 1), minor steel scrap and a large amount of molten iron from ironmaking as well as fluxes (lime/dolomite) are added into the furnace, and a 99% pure oxygen flow is applied at supersonic speed through a lance …
Steel Slag
Steel slag, a by-product of steel making, is produced during the separation of the molten steel from impurities in steel-making furnaces. The slag occurs as a molten liquid melt and is a complex solution of silicates and oxides that solidifies upon cooling. ... Recycling. It is estimated that between 7.0 and 7.5 million metric tons (7.7 to 8.3 ...
Stainless steel recycling: how to recycle steel | Montanstahl
Ease of recycling steels. Steel mills melt both steel and stainless steel scrap, once cleaned, directly in an apparatus such as an electric arc furnace. After that, the melt passes to a steel converter to remove excess carbon and nitrogen. Once carried out, at a ladle station a final analysis process allows metallurgical adjustments to the ...
Removal mechanisms of cadmium and lead ions in
Stainless steel slag obtained from scrap metal recycling, on the other hand, removed more than 90% of Cd from aqueous solutions [50]. Yu et al. [27] reported that activated modified steel slag at ...
Removal mechanism of arsenic (V) by stainless steel slags …
In this study, retention mechanisms of As(V) to the stainless steel slag from scrap metal recycling was investigated at initial pH (pH ini) ranging from acidic (pH 1.0) to alkaline (pH 10). The function was evaluated for the original slag as well as after a simple washing procedure to remove readily soluble surface coatings i.e. soluble oxides.
Detoxification and comprehensive recovery of stainless steel …
The fitting spectra of Moss spectrum analysis of stainless steel dust and chromium containing slag are shown in Fig. 2 (a) and (b), respectively. The Moss spectra were fitted with appropriate combinations of lorentzian profiles representing singlet, doublet and sextet components, and spectral parameters of these components IS …
Potential of Stainless Steel Slag Waste in …
Very encouraging results were obtained, since this research demonstrates the possible application of this stainless steel slag as a construction material, improving …
Recycling of stainless steel – British Stainless Steel …
This makes it a valuable source of those constituents to the stainless steel producer and a high proportion of material going into the melting furnace is usually recycled. Therefore there are well established systems to collect and recycle stainless steel. This includes trimmings and other scrap which arise during manufacturing of stainless ...
Slag recycling in submerged arc welding and its effects on …
Methodology used for recycling the slag has been presented graphically in Fig. 1.Approximately 30 kg of slag was collected from an Indian industrial unit engaged in the manufacturing of pressure vessels, boilers, digesters and chemical process vessels, free of cost. Fig. 2 (a) shows the slag as collected from the industry. The slag was …
A Review of Circular Economy Prospects for Stainless
Abstract The world of stainless steel production was 52 Mt in 2019, and the annual amount of slags including electric furnace, AOD converter, ladle, and casting tundish, was estimated at 15–17 Mt. Nowadays, only a minor fraction of slags from stainless steel production is utilized and a major part goes to landfilling. These slags …
An overview for the utilization of wastes from stainless steel
The phase analyses of the stainless steel slags were reported in many articles (Li and Tsai, 1993, Lopez et al., 1997, Huiting and Forssberg, 2004, Tossavainen et al., 2007, Tang et al., 2008, Zhang et al., 2008, Ma and Garbers-Craig, 2009).Huiting and Forssberg have already made a systematic research about the physicochemical and …
Steel Slag Recycling Solution and Beneficiation …
Steel slag is the waste slag produced in the steelmaking process, and its output is 15%-20% of the crude steel output, and it accounts for a large proportion of the industrial waste slag.
Recycling of Stainless-Steel Pickling Sludge via RKEF Route
Abstract. Stainless-steel pickling sludge (SSPS) is a hazardous solid waste, mainly containing CaSO 4, CaF 2 and certain amounts of Fe, Cr and Ni. The abundant sulfur in the SSPS hinders its utilization and deteriorates the product quality when the sludge is recycled as the feed for ferronickel production. In this chapter, we introduce a …
Efficient Utilization of Stainless Steel Dust and Chromium
In 2021, the output of stainless steel in China was 30.63 million tons, producing about 1 million tons of stainless steel dust and about 5 million tons of chromium-containing slag. At present, the development of efficient recycling of secondary solid waste resources can alleviate the consumption and depletion of mineral resources and is an ...
Valuable Recovery Technology and Resource Utilization of
As a type of metallurgical solid waste with a significant output, chromium-containing metallurgical dust and slag are gaining increasing attention. They mainly include stainless steel dust, stainless steel slag, ferrochrome dust, and ferrochrome slag, which contain significant amounts of valuable elements, such as chromium, iron, and zinc, as …
Assessment of Electric Arc Furnace (EAF) Steel Slag Waste's Recycling …
Steel slag is one of the most common waste products from the steelmaking industry. Conventional methods of slag disposal can cause negative impacts on humans and the environment. In this paper, the process of steel and steel slag production, physical and chemical properties, and potential options of slag recycling were reviewed. Since steel …
Recycling of steel slag aggregate in portland cement concrete…
With a complete steel slag treatment and recycling system, Japan recycled 98.4% of its 14 million tons of steel slag each year. Approximately 60% of steel slag is used in civil engineering and road construction, while 20% is used for internal recycling ( Nippon Slag Association, 2016 ).
