management of slag
Steel Slag
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 …
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Influence of Steel Slag on Properties of Cement-Based …
The improper treatment of steel slag (SS) will cause serious environmental problems. Therefore, appropriate management and disposal practices are essential to …
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Sustainable Approaches for LD Slag Waste Management in …
Reduce, reuse, and recycle are important techniques for waste management. These become significant for improving environmental and economic condition of industries. Integrated steel industries are generating huge amounts of steel slag as waste through the blast furnace and Linz–Donawitz (LD) process. Presently, …
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Slag Management of Carbon Feedstock Used in Gasification …
NETL, in collaboration with Eastman Chemical Corp (Kingsport, TN), targeted the joint evaluation and refinement of a slag management program developed by NETL (NETL IP, patent applied for) to control gasifier slag properties formed from ash in individual or combinations of different coal-based carbon feedstock materials and …
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Experimental Determination of Slag Emissivities for …
This article addresses the need for comprehensive slag emissivity data as a first step toward assessing the applicability of infrared (IR)-based systems in online …
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Effects of EDTA on the accelerated carbonation behavior of steel slag
To utilize the steel slag (SS) on a large scale and sequester CO2, a room-temperature wet carbonation process with the assistance of ethylene-diamine-tetra-acetic acid (EDTA) was developed. In this work, the accelerated carbonation process of SS with EDTA was investigated. The evolution of phase composition and microstructure of …
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Approach to the management of magnesium slag via …
Keywords Magnesium slag · Portland cement clinker · Burnability · Setting time · Strength Introduction Magnesium slag (MS) is a by-product that is generated in the production of metallic magnesium. MS, as a type of solid waste, generally contains harmful components. If MS is ran-domly disposed, the land resource is occupied and rivers or
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Steel slag in China: Treatment, recycling, and management
Steel slag is the main waste product in the steelmaking process. Because of its chemical composition and technical properties, it can be reused as raw material in steel plants and can serve as a ...
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A Review on Environmental Concerns and Technological …
Mineral process wastes, such as metallurgical slags nowadays, are of significant metals and materials resources in the circular economy. The usability of iron-making slag is well established; however, steel slag still needs to be utilized due to various physicochemical constraints. In this context, we have reviewed the global steel slag …
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Solid waste management in developing countries: Reusing of steel slag
Slag contain free lime (CaO) and magnesium oxide (MgO) in very small amount that can cause volumetric instability in concrete. However, such risk can be mitigated by stockpiling and sufficiently exposing the slag materials in an open environment to weathered for a long period of time before usage [33, 39].Some of the common …
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Study on comprehensive utilization and management of …
management content, formulating reasonable utilization principles, and implementing the measures and control of the tunnel slag gravel yard and the waste slag yard can improve the recycling utilization rate of tunnel slag, reduce the amount of tunnel slag waste, reduce the land occupation and damage the ecological environment.
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Constructed wetlands for steel slag leachate management: Partitioning
Highly alkaline leachates (pH > 12) can result from the current management practices of steel slag, a by-product of steel production, if water is allowed to contact and react with calcium oxide (CaO), calcium silicates and periclase (MgO) in the slag (Chaurand et al., 2007; Gomes et al., 2016b).
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Sustainable Approaches for LD Slag Waste Management in …
A detailed study on steel manufacturing with waste management of LD slag reveals that it can be cost effective if handled properly. For reuse of LD slag, after …
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Constructed wetlands for steel slag leachate management: …
Constructed wetlands can treat highly alkaline leachate resulting from the weathering of steel slag before reuse (e.g. as aggregate) or during disposal in repositories and legacy sites. ... s soluble at high pH, such as arsenic (As), chromium (Cr), and vanadium … Constructed wetlands for steel slag leachate management: Partitioning …
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Recent trends in slag management & utilization in the steel …
the slag management system. needs to be further strengthened . for making successful and. economically viable efforts for . its 100 % utilization (F ig.1). of iron ore and flux materials.
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Mechanistic study on calcium ion diffusion into fayalite: A …
Granulated iron silicate slag, a by-product of pyrometallurgical copper extraction, has excellent properties for construction applications. Slag modification with CaO enhances the application ...
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Steelmaking Slag
Steelmaking slag, or steel slag, is a by-product from the production of steel during the conversion of hot metal to crude steel in a basic oxygen furnace, or during the melting of scrap in an EAF.The slag is generated as a melt and is a complex solution of silicates and oxides that solidify upon cooling. 11 Depending on the specific steel production process, …
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Environmental and Socioeconomic Impact of Copper Slag…
Copper slag is generated when copper and nickel ores are recovered from their parent ores using a pyrometallurgical process, and these ores usually contain other elements which include iron, cobalt, silica, and alumina. Slag is a major problem in the metallurgical industries as it is dumped into heaps which have accumulated into millions …
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Use of waste copper slag, a sustainable material
The utilization of solid waste is the challenge for the civil and environmental engineers to utilize the waste from different industry to excel the sustainable development, and in the same time, it is matching with the cost concern of the present materials. Copper slag is a by-product obtained during smelting and refining of copper. The waste copper …
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Structural Characteristics and Cementitious Behavior of Magnesium Slag
Magnesium slag is an industrial solid waste generated during the production of magnesium metal. In China, the smelting of magnesium metal via the Pijiang method is the main commercial process for magnesium production [1,2].More than 6 tons of magnesium slag is produced when smelting 1 ton of magnesium metal on average, and …
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Slag Atomising Technology (SAT): Strategic management of
Comparison of conventional slag processing (CSP) versus new SAT process. A) Slag status of conventional method (CSP): In general slag that is processed after cooling by water in normal temperature. This slag processed by CSP contains free CaO about 0.1 % to 20%. Over 1% of free CaO is the primary factor of expansion of …
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Legacy iron and steel wastes in the UK: Extent
The extent of legacy iron and steel slag deposits was previously not well quantified. • A national database of slag deposits was created and analysed for mainland UK sites. • Carbon capture potential and critical raw materials (CRM) recovery potential estimated. • Current land use and conservation designations may limit resource recovery ...
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Risk post-assessment and management of a waste slag site …
The failure of waste slag is a disaster that impacting both environment and lives. In China, there are many waste slags after the engineering projects such as the construction of railway and road. Although the treatment of the waste slags obeys the regulations that the government have established, some accidents still happened. In …
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Study on comprehensive utilization and …
Based on the investigation of the comprehensive utilization technology of tunnel slag in expressway, the author finds that combining with the characteristics of the project, planning scientific ...
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Approach to the management of magnesium slag via the production …
This work aims to develop another approach to the management of magnesium slag (MS) via the production of Portland cement clinker. Thus, 0, 10, 20, 30, 40 and 50% limestone was replaced by MS and ...
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Use of steel slag as sustainable construction materials: A review …
Three methods have been widely employed to improve the reactivity of steel slag and concurrently reduce its potential harm on cement-based host materials: (i) physical excitation, which stimulates the hydration activity by physically grinding steel slag into finer powder (Liu et al., 2016), (ii) chemical excitation, which adds chemical admixtures, such …
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Steel slag in China: Treatment, recycling, and management
Steel slag is the main waste product in the steelmaking process. Because of its chemical composition and technical properties, it can be reused as raw material in steel plants and can serve as a substitute for aggregates in civil engineering. In this paper, we reviewed steel slag treatment, recyclin …
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Granulation and Heat Recovery from Metallurgical Slags
Conventionally, little chemical adjustments are made to the slag prior to its processing for subsequent use or disposal. However, recent attempts have looked into modifying the chemical composition of slag while hot, to render its chemistry and properties suitable for high-value products or recovery of minerals/metals from slag [11, …
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Environmental benefit assessment of steel slag utilization …
The rapid increase in steel slag generation globally highlights the urgent need to manage the disposal or utilization processes. In addition to conventional landfill …
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Review on the innovative uses of steel slag for waste …
New approaches towards utilization of slag for waste management such as landfill daily cover material, sand capping, carbon sequestration, water treatment and …
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