Carbon mineralization of steel and iron making slag Paving

Carbon mineralization technology has emerged as a promising method for permanently sequestering CO 2 by transforming it into a thermodynamically stable solid carbonate material Recently alkaline industrial waste particularly from steel and iron making processes has been identified as a proper feedstock due to its high potential for CO 2 storage and the

PERFORMANCE OF ALKALI ACTIVATED CONCRETE

C E R T I F I C A T E This is to certify that the thesis entitled Performance of Alkali Activated Concrete Mixes with Steel Slag as Coarse Aggregate for Rigid pavements submitted by Mr NITENDRA PALANKAR Register Number 121172CV12F03 as the record of the research work carried out by him is accepted as the thesis submission in partial fulfilment of the requirements

Study on the Early Effect of Excitation Method

In all measurements Cd < mg/L Pb < mg/L Hg < mg/L Cu < mg/L Zn < mg/L and Cr < mg/L were determined 18 692 thousand m 3 steel slag was used as the base

Applying steel slag leachate as a reagent substantially

A cost effective easy to implement and sustainable approach is needed to mitigate the production of alkaline leachate from steel slags that are reused or disposed in the environment To address this issue a humidification treatment process which is operated by wetting a stack of steel slag using aqueous reagents and letting atmospheric CO2 to be

Solidification/stabilization of soil heavy metals by alkaline

The addition of steel slag reduced the soluble Cd in soil by % compared to the control soil Bashir et al 2019 Steel slag Paddy field rhizobag experiment Smelter polluted soi As and Cd Steel slag significantly reduced Cd concentration in rice tissues by 48 78% at both growth stages of rice but increased As by 13 38% He et al

Steel slag amendment impacts on soil microbial communities

With the increase in iron/steel production the higher volume of by products slag generated necessitates its efficient recycling Because the Linz Donawitz LD slag is rich in silicon Si and

Steel slag in China Treatment recycling and management

Because of its porous structure and alkaline properties steel slag can be used for wastewater treatment Ortiz et al 2001 Yildirim and Prezzi regulations policies and standards related to steel slag We analyze why the utilization rate in China is low and introduce the challenges facing China s steel slag utilization Finally we

The mineral phase evolution characteristics and hydration

The cumulative heat release from the steel slag after alkaline excitation was J/g at 72 h which was J/g higher than that of the raw steel slag These conditions significantly improved the early hydration performance of the steel slag and promoted the

Effect of steel slag as alkaline exciter on the properties of

DOI / Corpus ID 269812128; Effect of steel slag as alkaline exciter on the properties of supersulfate cement article{Xu2024EffectOS title={Effect of steel slag as alkaline exciter on the properties of supersulfate cement} author={Fu Xu and Haoyu Meng and Wenxi Liu and Xiang Tang and Wenbo Ma} journal={Materials Letters} year={2024}

PDF Options for managing alkaline steel slag leachate A

Management of steel slag a major by product of the steel industry includes the treatment of highly alkaline leachate pH > from rainwater infiltration of slag deposits to prevent adverse

Effect of steel slag as alkaline exciter on the properties of

Steel slag is a byproduct of the steelmaking process with most steel slag in China being converter slag a material rich in CaO [6] The presence of C 2 S and C 3 S provides binding properties making it a potential cementitious material [7] Research has identified the interaction mechanism between steel slag powder and Portland cement in the early hydration

Geopolymers and other alkali activated materials why how

This paper presents a review of alkali activation technology moving from the atomic scale and chemical reaction path modelling towards macroscopic observables such as strength and durability of alkali activated concretes These properties and length scales are intrinsically interlinked and so the chemistry of both low calcium geopolymer and high

Steel Slag as a Precursor Material for Alkali Activated

steel slag; alkali activated; ProKnow C; review; bibliometric 1 Introduction In the steelmaking industry are generated two main kinds of slag blast furnace slag and steel slag The blast furnace slag if granulated is widely used for Portland cement fabrication [1] Their use by the cement industry is very common in many countries and

Remediation of Acid Mine Drainage AMD Using Steel Slag

Steel slag has been proven to be an effective environment remediation media for acid neutralization and a potential aid to mitigate acid mine drainage AMD Yet its acid neutralization capacity ANC is frequently inhibited by precipitate after a period of time while the characteristics of the precipitate formation process are unclear yet In this study ANC for basic

Recycling of steel slag as an alkali activator for blast furnace slag

The recycling utilization rate of steel slag in China is less than 30% Steel slag is rich in CaO and can produce the Ca OH 2 after hydration which are expected to activate the pozzolanic activity of blast furnace slag This work recycled steel slag as an alkali activator for the activation of blast furnace slag and prepared a steel slag blast furnace slag based SS BFS

Effect and Mechanism of Acetic Acid to Improve the

Alkali activation is the most common way to enhance the hydration properties of solid wastes including steel slag 5 It can not only recycle solid wastes but also reduce the amount of cement cutting the cost and carbon emissions 11 Up to now alkali activated steel slag has been widely used in mortar 12 13 concrete 14 brick 15 and

Mechanical properties and durability of alkali activated

refined Ma et al [28] reported that the addition of steel slag could improve the 3D concrete printing properties of geopolymer due to the increased alkalinity of the reaction system and the optimum content of steel slag was 10% Another investigation was about the replacement of Port land cement by alkali activated stainless steel slag in the

A review of the application of steel slag in concrete

Modern industrialization leads to an increasing demand for steel around the world the production of one ton of crude steel generates a substantial amount of steel slag SS 1 ranging from 130 200 accumulation of SS poses economic and environmental challenges particularly in developing countries with low utilization rates

Wettability and corrosion behavior between alkaline slag

The sodium smelting of vanadium titanium magnetite can achieve the comprehensive utilization of Fe V and Ti However the generation of alkaline slag during this process may cause damage to refractory materials The wettability and corrosion behavior of alkaline slag on three types of refractory MgO C SiC and high alumina refractory substrates

Solidification/stabilization of soil heavy metals by alkaline

The addition of steel slag reduced the soluble Cd in soil by % compared to the control soil Bashir et al 2019 Steel slag Paddy field rhizobag experiment Smelter polluted soi As and Cd Steel slag significantly reduced Cd concentration in rice tissues by 48 78% at both growth stages of rice but increased As by 13 38% He et al

Hydrogeochemistry of Alkaline Steel Slag Leachates in the UK

Drainage from steel slag disposal sites can be extremely alkaline and a source of pollution to surface and ground waters Data is presented detailing the hydrogeochemistry of seven highly alkaline

Mechanism of Acid Mine Drainage Remediation

The disposal of slag generated by the steel industry can have negative consequences upon the surrounding aquatic environment by the generation of high pH waters leaching of potentially problematic trace metals and rapid rates of calcite precipitation which smother benthic habitats A 36 year dataset was collated from the long term ambient