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No. 1688, Gaoke East Road, Pudong new district, Shanghai, China.
In order to promote the building material utilization of SS, high-temperature modification (HTM) of SS is performed using a composite modifier (CMSFR) containing silicon calcium slag (SCS), fly ash (FA), and reservoir …
The value-added utilization of converter steel slag is crucial, with China's annual production having reached 100 million tons. The utilization of converter slag in the construction materials sector is limited as it undergoes volume expansion during the aging process, mainly caused by the hydration reaction of free calcium oxide present in the slag. The influence of …
This paper investigates the use of steel slag in the place of basalt coarse aggregate in Stone Mastic Asphalt-13 (SMA-13) gradings in the early forming of an experimental pavement and evaluates the test performance of the mixes, combined with 3D scanning techniques to analyse the initial textural structure of the pavement. Laboratory tests were …
Steel slag is a solid waste produced in crude steel smelting, and a typical management option is stockpiling in slag disposal yards. ... Long et al. added 5%, 7%, and 14% fly ash to molten steel slag as the modifier. After the reaction at 1580 °C for 30 min, the corresponding digestion rate of f-CaO was 56.99%, 63.69%, and 68.55%, respectively ...
The results show that quicklime as modifier can greatly increase the content of cementitious minerals in modified steel slag and also promote the decomposition of RO phases and transformation of MgO in RO phase to f-MgO. ... Steel slag Quicklime Iron tailings Temperature/ ℃ SC５Ｇï¼'ï¼"ï¼ ï¼ ï¼™ï¼• ï¼ ...
Carbon dioxide sequestration using steel slag—modeling and experimental investigation. Smitha Gopinath, Anurag Mehra, in Carbon Dioxide Sequestration in Cementitious Construction Materials, 2018. 4.1 Introduction. Steel slag is an industrial waste that is generated during the production of steel. In the production of steel, oxides of metal impurities in the iron combine …
Most applications of steel slag such as concrete admixture, steel slag fertilizer and soil modifier, have also been presented in many studies [3], [4]. However, due to its special physicochemical properties and radioactivity, the large-scale use of steel slag in these aspects is limited [5]. If steel slag can be used to partially replace ...
Indirect carbonation of steel slag is an effective method for CO2 storage, reducing emissions, and promoting cleaner production in the steel industry. However, challenges remain, such as low Ca2+ leaching rates and slag management complexities arising from variations in mineral compositions. To address this, a high-temperature modification process is proposed to …
This article primarily reviews the research progress in catalytic fields such as catalytic pyrolysis, organic degradation, electrocatalysis, photocatalysis, transesterification, and carbon capture and storage, as well as …
Steel slag contains a large amount of CaO so it is possible to store CO 2 in carbonates forms using steel slag slurry with mild conditions of temperature and CO 2 pressure [61]. Chang, et al. [62] investigated the technological condition of CO 2 sequestration with steel slag slurry, including reaction time, liquid-to-solid ratio (L/S ...
Results showed that MS with 18 wt.% modifier addition exhibited an iron recovery rate of 61.0%, much higher than that (34.6%) of the original slag. The iron element in electric arc furnace (EAF) slag is extremely difficult to recycle due to the low specific magnetic susceptibility of the RO phase (a so ... Steel slag is an indispensable tool ...
Based on the insights of molecular dynamics simulation and results of microscopic properties, the covalent bond of O–Si–C was formed between the steel slag surface and the …
Gao [1] used steel slag composite micro-powder (SSCM) technology to initially realize high added value and utilization rates in industrial applications. However, overall SS incorporation remains limited, with its valuable elements underutilized. ... Adding a modifier promotes phosphorus-rich phase formation, then phosphorus is removed by ...
By using tartaric acid (TA) as a wet-method modifier to modify steel slag powder (SS), it is helpful to reduce the content of free calcium oxide (f-CaO) in SS and further improve …
Basic oxygen steelmaking (BOS) slag, a product of hot metal element (e.g., Si, Mn, Fe, P) oxidation and flux (e.g. lime, dolomite) dissolution, plays a critical role in the production of high-quality crude steel, although its behavior inside the BOS vessel (formation and reaction with metal droplets and gas) is still not clear and its recycling has always been challenging.
The growth of electric arc furnace (EAF) steelmaking in North America has occurred mainly in the past 40 years due to low electricity prices, an abundance of steel scrap (especially near large population centers), and the …
Using steel slag, iron tailings and fly ash as aggregates, a new polymer-modified waterproof mortar was developed with this P(St-co-HEMA) microsphere as modifier. The products will have both environmental and economic benefits.
Steel slag, which makes up a gigantic amount of metallurgical industrial solid waste, was in this experiment successfully synthesized an inexpensive adsorbent used to remove nitrate pollution from aqueous solution. This adsorbent was obtained by mixing steel slag, aluminium hydroxide and deionized water, and aging this at a mass ratio of 3:0.45:2, and then activating it at 800 …
A new treatment method of combined crumb rubber and steel slag modifier for asphalt binders was proposed in this work. The viscosity, rheological properties, and thermogravimetric analysis of modified asphalt mortar were …
Hot slag was modified to enhances its properties or prepare high value-added products. Disposing hazardous solid waste and recovering valuable metals by modification …
The phosphoric acid modifier (HP) with anhydrous ethanol as the solvent is prepared as modifier for steel slag. To understand the effects of HP modifier on the performance of steel slag powder, the changes of mineral compositions, specific surface area, hydration activity and soundness of converter steel slag powder are characterized.
Various percentages of steel slag modifier, namely 5%, 10%, 15%, and 20% of the total weight of the fine aggregate, were incorporated. The outcome s of .
The steel slag output is about 12% 15% of the crude steel output[1]. Based on this, it is estimated that the global steel slag output in 2021 would be about 230-290 million tons. China's steel slag production is about 120-160 In 2021, China's steel industry carbon emissions accounted for 15% of the country's total
Pavement construction requires a large amount of aggregate; however, natural aggregate mainly originates from mountain mining, which significantly impacts the natural environment, and the scarcity of aggregate cannot be ignored [5].Steel slag aggregate (SSA) exhibits superior robustness and wear resistance properties compared to conventional …
Steel slag will be an alternate source to conserve natural resources by utilizing large quantity of steel slag in construction industry. ... The mortars developed gave better water resistance and mechanical properties than that of commercially available modifiers such as ethylene vinyl acetate and styrene acrylic copolymers (Liu et al., 2014).
Steel slag had lower activity and much lower hydration rate than cement. Quicklime and iron tailings were designed as modification agent to adjust the composition and properties of high temperature steel slag. The results show that quicklime as modifier can greatly increase the content of cementitious minerals in modified steel slag and also promote the decomposition of …
This study investigates the pattern of influence of blast furnace slag tempering on the composition and structure of steel slag. The chemical composition, equilibrium phase composition, microscopic morphological characteristics and elemental composition of microscopic regions of steel slag and blast furnace slag modified by high temperature reconstruction were …
In order to promote the building material utilization of SS, high-temperature modification (HTM) of SS is performed using a composite modifier (CMSFR) containing silicon …
The lower degree of application of steel slag in pavement engineering in China directly shows that about 70.5% of steel slag is not recycled, which causes environmental pollution and waste of useful resources (Das et al., 2007; Guo et al., 2018). With the rapid growth of car production in China, the disposal of used tires is also becoming a ...
Drawing on the idea of treating steel slag with waste and using CMCDL as a composite modifier, this study improved the chemical composition and mineral composition of steel slag through multi-component raw materials, increased the content of cementitious phases (C 3 S, C 2 S, C 3 A) and vitreous body in steel slag, revealed the mechanism of ...
