Properties and hydration of blended cements with steelmaking slag
The utilization of two kinds of iron slag in the production of pozzolanic cement is introduced. A series was created with a fixed percentage of OPC (30%) and varying amounts of imported granulated blast-furnace slag (IGBFS) and air-cooled slag (ACS) at which imported IGBFS was substituted by ACS with the mass ratios of 10, 20, and 30%.
New Applications for Iron and Steelmaking Slag
Iron and steelmaking slag is classified as BF (Blast Furnace) slag or steelmaking slag. BF slag is generated during the process of reducing iron ore by coke in a blast furnace. Its sources are the gangue content of iron ore, that is, constituents of iron ore other than iron, and lime con-tent added to adjust the composition of molten slag. Most ...
Steelmaking Slag Recycling as Raw Material and Its Effect on …
The discussed study concerns the recovery of steelmaking slag (SS), produced by a local steel plant, to make this by-product a raw material for portland cement clinker …
Preparation and properties of carbonated steel slag used in cement …
1. Introduction. Steel slag (SS) is a waste residue produced by steelmaking, which produces more than 110 million tons each year in China, but the effective utilization rate of SS is about 22% [1].The accumulation of SS is not only a waste of resources, but also a pollution to the environment [2], [3], [4].. Researches show that SS and Portland cement clinker have …
The potential utilization of slag generated from iron- and …
Cement produced from slag has been used for decades, and the most typical one is Portland clinker (35%)–Steelmaking Slag (30%)–Blast Furnace Slag (30%) Cement …
Utilization of Local Steelmaking Slag in Concrete
The use of local steel slag in asphalt pavement has been investigated. Bayomy and Abdul Wahhab [9] concluded that steel slag can be used to replace coarse aggregate in asphalt concrete mixes.Slag mixes showed significantly better stability, better water damage resistance, higher splitting tensile strength and modulus of resilience than those made with natural …
Industrial uses of slag. The use and re-use of …
The use of slag in cement represents a substantial reduction. ... Steelmaking slag, an important metallurgical by-product, is composed of a large amount of valuable components, including CaO, Fe t ...
Upcycling of Slags from Ferrovanadium Production as Low …
From stainless steelmaking slags, ferrochrome and ... A quality testing of the novel cement (slag 2) is the strength development upon the first firing. To monitor the strength evolution of the FeV slag-bonded refractory castables while sintering occurs, samples of the developed mix design (20MA-R) were dried at 110 °C, then dehydroxylated at ...
[PDF] A Review of Circular Economy Prospects for Stainless Steelmaking …
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 contain high-value elements (Cr, Ni, Mo, Ti, V…) …
Chemical, Mineralogical, and Morphological Properties of Steel Slag
The slag generated from a steelmaking cycle is later processed, and the final product after processing is referred to as basic-oxygen-furnace slag (BOF slag). The chemical reactions occurring during the removal of impurities determine the chemical composition of the basic-oxygen-furnace slag [ 1, 3, 5 ].
CO2 Mineralization and Utilization using Steel Slag for …
Both steelmaking via an electric arc furnace and manufacturing of portland cement are energy-intensive and resource-exploiting processes, with great amounts of carbon dioxide (CO2) emission and ...
Steel slag and its applications in cement and concrete …
Steel Slag—Its Production, Processing, Characteristics, and Cementitious Properties. Steel slag is a byproduct from either the conversion of iron to steel in a basic …
Self-compacting concrete incorporating electric arc-furnace steelmaking
Two types of cement were used in the present research: first, a Portland cement type I 52.5 R; second, a Portland cement type IV/B-V 32.5-N; both in accordance with UNE-EN 197-1 standard. The type I cement includes 90% Portland clinker, 5% calcium carbonate powder fines and 5% gypsum.
Development of a calcium aluminate cement from …
The slag paste, prepared by mixing slag with water, exhibited flash setting behaviour due to the presence of C 12 A 7 and C 3 A phases. In contrast, the slag clinker, developed by sintering a …
Roller-Compacted Concrete Pavements Produced Entirely with Steelmaking
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BOF Steel Slag: Critical Assessment and Integrated Approach for
During steel production, the impurities in the hot metal react with the fluxes forming the steel slag. Chemical constituents of this steel slag (SS) are relevant to iron/steelmaking or blended cement manufacture. Harmful impurities present in it, however, limit its recycling to these applications. Japan, Europe, and the US consume a significant amount of …
The Steelmaking Transformation Process and Its Consequences for Slag
The main challenge of the European steel industry for the next decade is the steel production transformation process. Many steel producers aim to avoid their CO 2 emissions by substituting the CO 2-intensive blast furnace/basic oxygen furnace route by a gas-based direct reduced iron (DRI) process combined with an electric smelting process.Thus, the well-known …
Effects of Steelmaking Slag and Moisture on Electrical …
2.1. Mix Designs, Materials, and Specimen Preparation. The mix design of the concrete specimens used in this study are shown in Table 1.Hong et al. [] evaluated the microstructure and strength characteristics of concrete containing steelmaking slag according to water to binder ratio (w/b).Among the three w/b (0.275, 0.300, and 0.325), the best …
Characteristics of steel slags and their use in cement and concrete…
Section snippets Generation processes. 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 …
An Overview of Utilization of Blast Furnace and Steelmaking Slag …
Ever-increasing energy costs and environmental restrictions have compelled researchers to focus on the reutilization of vast amounts of industrial by-products such as blast furnace slag and steelmaking slag, in energy extensive and material extensive industries such as iron-steel production and construction.
Research Progress on Iron- and Steelmaking Iste Slag …
Promoted by carbon neutrality and solid iste policies, iron- and steelmaking iste slag (ISWS)-based glass-ceramics have drawn attention because of their contribution to achieving the net-zero carbon emissions goal for the iron- and steelmaking industry. However, a holistic estimation of the preparation, property and GHG (greenhouse gas) emission …
The steel slag blended cement | Semantic Scholar
The potential application of iron- and steelmaking slag has been reviewed, which included the slag utilization in construction as cement and sand, in water, soil, and gas treatment, as well as in value material recovery.
The Steelmaking Transformation Process and Its …
Thus, the well-known latent hydraulic granulated blast furnace slag (GBS) will vanish step by step. For more than 140 years, this slag has been used as a supplementary …
Durability studies on steelmaking slag concretes
Slag concrete requires a higher water content, due in all probability to the greater porosity of EAF and the greater proportion of fine fraction (0–1 mm) [11], [38]; part of the mixing water becomes trapped in the pores of EAF.The proportioning of both slag concretes was similar (in volume), the main factor behind their different water demand and global weight being …
Utilization of steelmaking slag in cement clinker production: …
The cement industry significantly contributes to global CO2 emissions, with a notable portion attributed to limestone calcination during cement clinker production. To …
The recycling and reuse of steelmaking slags — A review
A 4000 m 2 steel slag (SS) bed was constructed in the brackish water area for water quality remediation in 2017. This study demonstrates the ability of SS to stimulate carbon sequestration based on one-year pilot and in situ SS beds. The pilot SS bed increased the soil organic matter (SOM) content by 5.1 wt %, sequestering sewage-derived organic carbon (C …
Utilization of steelmaking slag in cement clinker
The cement industry significantly contributes to global CO 2 emissions, with a notable portion attributed to limestone calcination during cement clinker production. To …
CO2 Mineralization and Utilization using Steel …
Both steelmaking via an electric arc furnace and manufacturing of portland cement are energy-intensive and resource-exploiting processes, with …
Properties and hydration of blended cements with steelmaking slag
One reference cement and three cements containing up to 45% w/w steelmaking slag were prepared. Water demand, setting time, soundness and compressive strength were measured. In addition, XRD, TGA and SEM were applied in order to study the hydration products, the hydration rate and the microstructure of the cement-slag system. 2. Experimental
Microstructure and Dimensional Stability of Slag
DOI: 10.1061/(asce)mt.1943-5533.0004372 Corpus ID: 250137148; Microstructure and Dimensional Stability of Slag-Based High-Workability Concrete with Steelmaking Slag Aggregate and Fibers
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