Effect of wet-grinding steel slag on the properties of …

The main mineral composition of steel slag is olivine, merwinite, C 2 S, C 3 S, C 4 AF, C 2 F, RO phase (CaO-FeO-MnO-MgO), f-CaO and Fe. Due to the presence of C 2 S, C 3 S, C 4 AF and C 2 F, steel slag could show a weak cementitious performance, which could be considered as supplementary cementitious material after processing. However, the bad grind …

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The mechanism of hydration reaction of granulated blast furnace slag

Metallurgical solid waste produced in the iron and steel industry and cement clinker has the same chemical compositions such as C 2 S, C 3 A and C 4 AF. By using granulated blast furnace slag and steel slag as admixtures, a series of concrete with different excellent properties such as high strength, low heat release, and strong chlorine fixation was developed [[1], [2], [3]].

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Steel-slag: a supplementary cementious material and basis …

This article introduces a commercialised energy-saving cement made by co-grinding OPC clinker with steelmaking slag (steel-slag) and blastfurnace slag that represents a different …

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Sustainable Utilization of Steel Slag from Traditional …

With the rapid development of China's steel industry, rising rates of steel production have led to the increase of steel slag emissions. Steel slag is a kind of industrial solid waste produced in the process of iron and steel smelting, and its emission is about 15 wt%–20 wt% of crude steel output [].According to the data released by the World Iron and Steel …

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Semi-dry and aqueous carbonation of steel slag: …

The moistened and homogenized steel slag powder was then transferred to a specialized carbonation chamber for semi-dry carbonation curing. A 20% CO 2 stream (by volume) was introduced into the chamber, maintaining a constant pressure of 2 bar at room temperature to facilitate ongoing carbonation. The carbonation duration was varied (10 min, 30 ...

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Effect of steel slag powder on the sulfate corrosion …

Steel slag comprises 10–15 % of the steel production output and has a mineral composition similar to that of Portland cement clinker (C 3 S, C 2 S, RO phase) and, theoretically, should have high cementitious properties. Because steel slag is generated after rapid cooling at temperatures above 1600 ℃ (higher than the formation temperature of ...

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Investigation on the Role of Steel Slag Powder in Blended …

Steel slag powder and quartz powder with different particle sizes were prepared using a laboratory ball mill under different grinding times. Then, four types of steel slag powders with median diameter in the range of 10∼15 μm (denoted by R1), 15∼20 μm (denoted by R2), 20∼30 μm (denoted by R3), and 60∼70 μm (denoted by R4) were selected, respectively.

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Preparation of mine backfilling from steel slag-based non-clinker …

The mechanism of hydration reaction of granulated blast furnace slag-steel slag-refining slag-desulfurisation gypsum-based clinker-free cementitious materials Journal of Building Engineering., 44 ( 2021 ), 10.1016/j.jobe.2021.103289

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Innovative utilization of carbonated steel slag in low-carbon …

Due to the substitution of cement clinker by carbonated steel slag, the cement clinker content decreases, resulting in a reduction of generated hydration products and a gradual decrease in compressive strength. The strength of MW-50(C20) is similar to that of LC 3-(20–30) (with a clinker content of 20–30). When carbonated steel slag is used ...

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Different carbon treatments for steel slag powder and their …

Steel slag powder is the waste slag produced in the steelmaking process, and its emissions account for about 15%–20% of crude steel production in China (Shi et al., 2022a; Shi, 2004; Wang et al., 2011).However, a large amount of steel slag cannot be effectively utilized, which resulting in a large amount of steel slag stockpiled (Li et al., 2021).

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Influencing mechanisms of RO phase on the cementitious …

Steel slag (SS) is a by-product of the steelmaking process, which accounts for about 12 % ∼ 15 % of steel production [1], [2].More than 100 million tons of SS are produced every year in China, and the cumulative stockpile stock has exceeded 1 billion tons [3], [4].However, the utilization rate of SS is only around 22 % in China [5], [6], [7].

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Review of hydration and hardening properties of steel slag in …

This study indicates that: (1) Desulfurized gypsum could promote the hydration and dissolution of steel slag, while cement clinker, slag, and fly ash provide an alkaline environment for steel slag …

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Applications of Steel Slag Powder and Steel Slag Aggregate …

1. Introduction. Steel slag is a by-product of steel manufacturing [].Approximately 160 kg of steel slag is generated per ton of steel produced [].The common chemical compounds in steel slag are SiO 2, CaO, Fe 2 O 3, Al 2 O 3, and MnO [3, 4].The major mineral components of steel slag are C 3 S, C 2 S, C 4 AF, RO phase, and free-CaO [5, 6].Many studies have shown …

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Application of Steel Slag as an Aggregate in Concrete …

The latest research combines accelerated carbonation techniques with artificial granulation or compaction manufacturing processes to make steel slag powder into artificial aggregates …

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Hydration and soundness properties of phosphoric acid modified steel

Indeed, steel slag powder can be a potential material for blended cement, the incorporation of steel slag powder in cement can not only reduce the cement clinker production, but can also improve the microstructure of concrete owing to …

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Hydration mechanism and orthogonal optimisation of mix proportion …

Steel slag and blast furnace slag-based clinker-free concrete has very low early strength. This paper focuses on the effect of different curing temperatures on the compressive strength of clinker-free concrete and on optimising the mix proportion by orthogonal tests based on the perspective of prefabricated concrete, and then discusses the hydration procedures.

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Use of Slags in the Production of Portland Cement Clinker

The introduction of slag intensifies the formation of belite phase at early burning stages. Some changes in the composition of a 'liquid' phase, which increase its temperature and molten viscosity with the increase of slag composition in a raw mix, also affect the features of crystallization of clinker phases.

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Investigation on industrial trial production of multi-phased clinker …

Steel slag multi-phased clinker implemented trial production in cement plant for the first time, which provided an effective low carbon strategy for comprehensive utilization of granular steel slag to produce high quality cement clinker.The results show that through optimizing process parameter of cement kiln system, superior qualified clinker was produced stably along with a …

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Greener phosphogypsum-based all-solid-waste

This work evaluates steel slag powder (SSP) as the alkaline activator for EPSC, to fabricate greener all-solid-waste binders. Hydration properties, mechanical strength, carbonation resistance, and volumetric stability are researched. ... Study on the properties and carbon footprint of low heat cement clinker prepared by recycled concrete powder ...

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Effect of the combination of polyvinyl chloride (PVC) and steel slag …

Preparation of specimens and mix proportions. The study utilized ordinary Portland cement in specific mixing proportions, as shown in Table 3, to assess the mechanical strength, durability, and microstructural properties of cement mortar.A total of 13 mixes of cement mortar are prepared using steel slag and PVC powder as a partial replacement for cement according …

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Review Accelerated carbonation of steel slag: A review of …

Research has shown that steel slag, due to its similarity in composition to cement clinker components such as dicalcium silicate (C 2 S), tricalcium silicate (C 3 S), ... 30% steel slag powder and OPC as binder;natural river sand as fine aggregate: Staphylococcus pasteurii SS9: Strength improvement by 15.9% for 7 days [90]

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Process to utilize crushed steel slag in cement industry …

The steel slag powder is thoroughly mixed with other raw meal powder, while those larger steel slag particles are wrapped in raw meal powder and enter the rotary kiln. ... However, by implementing optimized quality indices and operational processes, the plant was able to produce a steel slag clinker with excellent performance, whose indicators ...

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Synergistic hydration mechanism of steel slag-metakaolin …

Steel slag (SS), as a solid waste from the bulk iron and steel metallurgical industry, is similar to cement clinker in terms of its main mineral components and chemical composition, which contains large amounts of silicate minerals (C 2 S, C 3 S) and small amounts of aluminates (C 3 A) and ferric aluminates (C 4 AF). These minerals confer hydration and reactivity to SS, …

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SRON® Silo System For Cement, Mining, Coal, Fly …

It is 3 sets of spiral steel silos with a total storage capacity of 15,000t for the storage and disposal of steel slag powder at BAOWU Wuhan Metal Resources Limited Company Material: Steel Slag Powder ... and bulk material port …

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A review of the application of steel slag in concrete

A slight addition of SSP (0 - 15%) has slightly adverse effects on the compressive strength of clinker [60], [70], ... When Steel Slag Powder (SSP) is incorporated as an SCM in concrete, there is a tendency to improve the workability of concrete. However, certain issues may arise, such as delayed setting, decreased early strength and adverse ...

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Experimental Study on Calcination of Portland Cement …

In order to increase the utilization rate of stainless steel slag, reduce storage needs, and mitigate environmental impacts, this study replaces a portion of limestone with varying amounts of …

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Experimental and theoretical study of fire resistance of steel slag

Currently, steel slag has been widely used in many fields such as road construction, soil improvement and building materials. In particular, the mineral composition of steel slag is similar to that of cement clinker, including various oxides such as amorphous silica (SiO 2), magnesium oxide (MgO), alumina (Al 2 O 3), iron oxide (FeO/Fe 2 O 3 /Fe), manganese oxide (MnO/Mn 3 …

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Investigation on the Role of Steel Slag Powder in Blended …

Steel slag powder has the most obvious effect on the 3 d strength of blended cement. For example, when 20% steel slag powder is added, the 3d strength of blended …

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Exploring properties and hydration mechanisms in clinker …

Semantic Scholar extracted view of "Exploring properties and hydration mechanisms in clinker-free cement formulated from steel industry solid waste using the extreme vertices method" by Jie Liu et al. ... Effect of environment conditions on volume deformation of blended cement mortars containing blast furnace slag and steel slag powder. Jihui ...

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Benefits of using steel slag in cement clinker production for

The two clinkers showed acceptable phase compositions according to the standard; this indicated that the addition of steel slag did not affect the formation of the main mineralogical phases, which were comparable with those in clinker O. Steel slag clinker A showed minimal differences with iron ore clinker O in terms of distribution of the ...

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Utilization of steelmaking slag in cement clinker production: A review

To improve the utilization efficiency of steel slag in cement industry, cement clinkers are prepared by simulated multi-phased clinker sintering technology with crushed steel …

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Hydration Mechanism of Sustainable Clinker-Free Steel Slag …

More than 600 million tons of slag are generated globally every year, leading to multiple environmental issues. Thus, research on applications of slags is crucial. The use of steel slag in cement is limited by its low hydraulic activity and volumetric instability. In the current study, we present a clinker-free steel slag binder (SSB) and discuss the coupled alkali–sulfate …

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Process to utilize crushed steel slag in cement industry …

The steel slag powder is thoroughly mixed with other raw meal powder, while those larger steel slag particles are wrapped in raw meal powder and enter the rotary kiln. ... Moreover, clinker minerals in steel slag produce an effect of seed crystal, reducing the nucleation barrier and promote the formation of clinker minerals like C 3 S and C 2 S ...

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The Incorporation of Steel Slag into Belite …

The potential use of steel slag from treated steel slag in belite-sulfoaluminate cements was investigated in this study. Cement clinkers with two phase compositions were synthesized, allowing the incorporation of different …

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Experimental study on performance optimization of steel slag powder …

Ma et al. [19] prepared a clinker-free solid waste concrete with a composite cementitious material, containing steel slag, slag and flue gas desulfurization gypsum (FGDG), and concluded that the ...

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Hydration and mechanical properties of cement-steel slag …

Considering that the chemical compositions of converter steel slag is similar to that of Portland cement clinker, using steel slag as supplementary cementitious material (SCM) is a promising way owing to the dual benefits of resource utilization and environmental protection. ... Properties of 5-year-old concrete containing steel slag powder ...

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Physical properties and chemical composition of …

Steel slag is more wear-resistant than blast furnace slag. The main chemical composition of steel slag is basically similar to that of Portland cement clinker and blast furnace slag. The content of crushed steel slag varies …

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Comparative analysis of carbonation strengthening …

Ethanol was added to the steel slag powder to ensure thorough mixing, followed by10 min of ultrasonic treatment. Drops of the resulting suspension were then applied to a copper grid, and images were captured using an accelerated voltage of 200 kV. ... Process to utilize crushed steel slag in cement industry directly: multi-phased clinker ...

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Hydration superposition effect and mechanism of steel slag …

Steel slag-slag composite powder (SSCP) has three exothermic peaks, which are the dissolution peak, hydration peak of steel slag and pozzolanic ash reaction peak of GBFS …

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Application of molten iron desulfurization slag to replace steel slag …

The strength activity index of atmospheric-pressure mineralized steel slag reaches 95.8 % on 28 d due to the dissolution of the barrier layer during hydration process, with pozzolanic activity being the most improved. ... cement clinker (CC): gypsum powder (GP):NaOH: slaked lime (SL) by analyzing the physical and chemical properties of CSS and ...

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