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·The present study aims in developing high density radiation shielding composite using induction furnace IF steel slag as an aggregate coarse/fine in concrete IF steel slag is incorporated in concrete specimens Mix a 0% of slag Mix b 40% of slag as coarse aggregate Mix c 40% of slag as coarse aggregate and 100% as fine aggregate of size 150 × 150 × 50
·Steel slag is the by product of steelmaking and it is the desirable substitution of natural aggregate in asphalt mixture [6] [7] Recycling steel slag as aggregate can reduce the consumption of natural aggregate and it relieves the environmental hazards caused by the accumulation of steel slag [8] [9]
·Ultrapure water MΩ cm 25 °C was collected from a HHitech water purification system The sample of steel slag was provided by Chengde Iron and Steel Corp Chengde China CO 2 decalcification towards amorphous CSH not only have potential in the direct reutilization of spent adsorbents for recycling metal adsorbed
·of strength than the steel slag; on the other hand steel slag due to its content of iron oxide has shown to be much stronger than granite In addition lower silica content in steel slag and bottom
·1 Introduction Integrated steel plants utilize large amounts of slag former such as lime and dolomite to produce steel During the production of steel 2 4 t of wastes are being generated per tonne of steel produced Das et al 2007 The various solids wastes exist in the form of slags sludges dusts mill scales etc Amongst the numerous solid wastes steel slag
·Global industrialization had led to the extensive use of fossil fuels resulting in significant emissions of greenhouse gases such as CO 2 [1] Among the contributing industries the steel and iron industry is responsible for about 7% of global CO 2 emission [2] Additionally the steel making industry produces a large amount of steel slag comprising approximately 10
·The recovery of metals from copper slag known as secondary metal recovery not only maximizes the value of resources but also responds to stable market demand Nowadays secondary metal recovery is an important research direction for copper slag utilization and recycling and has received increased attention in recent years [25 26]
·The high efficiency recycling of metals in copper cadmium slag by ozonation with ultrasonic catalysis is proposed • The leaching percentage of copper is over 99% and the apparent activation energy is kJ/mol • Wrapping layer and reaction interfaces are broken and renewed by mechanical and cavitation effects of ultrasound •
·Steel slag is a major waste product of the steelmaking process Owing to its chemical composition it can be reused as a raw material in steel mills and a substitute for aggregates in engineering In 2016 the Republic of Korea ROK introduced the Environmental Assessment of Recycling EAoR system for the safe recycling of waste products which
·In the secondary refining process of industrial silicon approximately 15 pct of the silicon is trapped in the silicon slag Thus the separation and recovery of silicon from the industrial silicon slag are highly significant for the reuse of silicon resources Based on the large difference among the melting temperature density and viscosity of the silicon and slag in
·Large amounts of lead slag are produced during the production of primary lead and secondary lead Considering lead concentrate smelting as an example a primary lead smelting system production of 1 t of lead will discharge 7100 kg of lead slag Hou 2011 At the secondary lead recycling process for each ton of metallic lead produced 100 350 kg of slag
·Recycling steel slag into construction materials is a promising approach to sustainable development addressing both waste management and resource scarcity challenges [23] [24] It was verified that steel slag with large adhesive force and honeycomb porous structure upgraded the performance indexes of asphalt mixtures [25] [26] Recently
·Leaching is a significant method for recycling valuable metals and refining copper slag and achieves the desired results through reactions between the valuable or harmful metal elements in the slag and some chemical leaching agents or biotic solutions added to the slag followed by subsequent filtration washing and extraction Georgiev et
In addition the immersion of steel slag aggregate in water for 6 months can reduce by 68% the content of free lime and free magnesia in order to avoid the expansion volume due to their characteristics "Reuse and Recycling of By Products in the Steel Sector Recent Achievements Paving the Way to Circular Economy and Industrial Symbiosis
·ABSTRACT The objective of this paper is to investigate the utilization of Submerged Arc Welding SAW slag as a fresh flux for sustainability Certain alloying elements were added to the crushed slag to adjust the resultant composition of the weld metal as per American Welding Society AWS and operational characteristics such as arc stability
·Considering the stable chemical property of PGMs and the environmental pressure in recycling metal/matte smelting is the most popular and effective method in recovering PGMs from SAC for its large processing capacity and mature industrial application 3 thus resulting in difficult separation of the metals from slag by their gravity [9]
·cessary to explore new slag recycling technologies based on the distinct physical or chemical properties of the slag Japan and China are two leading steel producing coun tries The mass production of crude steel is accompanied by large quantities of slags Great efforts have been made in both countries to decrease slag emission or promote slag
Currently there is a limited amount of research on the smelting slag in general Zhang S et al has successfully developed high porosity ceramics and glass ceramics using smelting slag from the waste automobile catalyst [31] In addition the Chinese invention patent also mentioned a method for recovering rare metals lanthanum cerium and zirconium from smelting slag
·With the in depth research on industrial solid waste recycling technology steel slag is widely paid attention to as an inevitable product in steelmaking process China produces more than 100 million tons of steel slag every year but 70% of steel slag is still not used rationally and its utilization potential is huge Using cheap steel slag
·Production of petrochemical catalysts accounts for one of the largest shares of platinum group metals PGMs consumption; thus recycling of spent petrochemical catalysts holds great economic value Conventionally PGMs are recovered through hydrometallurgical processes which have a low recovery efficiency and produce a large amount of waste In this
·A new route for preparing multidoped spinels MxMg1 xFe2O4 M = Mn Ca by using converter steel slag as raw materials is proposed in this study All of Mg Fe M and dopants used to prepare MxMg1 xFe2O4 were simultaneously recovered from the slag The results indicate that the slag derived MxMg1 xFe2O4 exhibited a single phase spinel and
Steel slag is one of the most common waste products from the steelmaking industry Conventional methods of slag disposal can cause negative impacts on humans and the environment In this paper the process of steel and steel slag production physical and chemical properties and potential options of slag recycling were reviewed Since steel is mainly produced through an
·The high recycling rate of steel slag in Japan may be due to the invention of the Multi Refining Converter MURC process in the last decade which separates the phosphorus from the molten metal prior to the BOF whereas low phosphorus iron ore may be the source used in many European steelworks In China enriched phosphorus ore returning a
·However they are limited to studies of steel slag recycling for Portland cement [63] concrete and mortar [40] alkaliactivated materials [64] and greenhouse gas emissions [65 66] Even though
