Treatments and Recycling of Metallurgical Slags - Research …

In this chapter, techniques for the treatment and recycling of metallurgical slags are described. Metallurgical slags are considered secondary raw materials and are used or added during the process to improve steelmaking practice. Steelmaking slag added into ladle slags makes it possible to minimize slag line wear.

Recycling of Steelmaking Slag in Seawater as an Iron …

composition range of actual BOF slags. Slag-I with larger CaO/SiO 2 ratio (= 3.0), located in the 2CaO·SiO 2-saturated region at steel refining temperature (approximately 1723K), is designed to represent the BOF slag. Slag-II with smaller CaO/SiO 2 ratio (= 1.0), located in the liquid region, is used to represent the composition-adjusted BOF ...

Treatments and Recycling of Metallurgical Slags

EAF slags present great possibilities of recycling, similar to those of BOF slags. Slags recycling in cement production, road buildup, or other applications (that involve soil contact) are subjected to important environmental requirements. The material must not present reactions or composition changes greater than 1% in a period of 100 years.

Recycle Metal From Slag: The Recycling Process - JXSC Machine

Ball mill is for grinding slag (0-20mm) to 0-1mm or smaller size depending on customer requirement. Then output small fine powder go to shaking table for recovery the metals from slag. The shaking table has an extremely high recovery ratio for recovery heavy metals from slag. Then will get metal concentrate from the shaking table.

Recycling of crushed concrete and steel slag in drainage …

For steel slag with particle sizes between 4.75 and 9.5 mm, the final volume expansion rate of the modified steel slag was 46% lower than that of unmodified steel slag.

ITP Steel: Recycling and Reuse of Basic Oxygen …

The recycling of blast furnace (BF) slag has made significant progress in past years with much of the material being utilized as construction aggregate and in cementitious applications. However, the recycling of BOF/BOP slag still faces many technical, economical, and environmental challenges.

Recycling & Reuse of BOF - BOP SM Slags - osti.gov

OSTI.GOV Program Document: Recycling & Reuse of BOF - BOP SM Slags. Recycling & Reuse of BOF - BOP SM Slags. Full Record; Other Related Research; Abstract. New Technologies and Methodologies May Allow Value-Added Utilization of Steelmaking Slag Thus Reducing Waste and Use of Landfills, and Saving Energy. Publication Date: Tue Jan 01 …

Recycling of ironmaking and steelmaking slags in Japan and …

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- ... contrast, basic oxygen furnace (BOF) slags contain signific-ant amounts of CaO as a refining flux to absorb impurities, e.g., S and P, in hot metals, as well as iron ...

Dissemination of results of the European projects dealing with …

Webinar on Slag (14 June 2021) Recycling of BOF slag in sinter plant and LF slag in BF REFFIPLANT • Summery of by-products and waste management in the steel works • Integrated process optimization in the steelworks: case studies using holistic models for material treatment units • Simulation of BOF slag use as pellets for sinter plant showed

Recycling of Basic Oxygen Furnace Slag as a Raw Material for …

The purpose of this study was to recycle basic oxygen furnace (BOF) slag in the production of autoclaved aerated concrete (AAC), and to examine the influence on the properties of AAC products. The magnetic substances in the BOF slag accounted for about 15 wt.% and the magnetic proportion increased as the particle size decreased. The nonmagnetic portion of the …

Recycling of BOF steelmaking slag | Industrial Efficiency …

Recycling of BOF steelmaking slag Michigan Technological University is developing an integrated system of technologies to recover the iron value from BOF steelmaking slag. It will also divert the residual non-iron bearing fraction into a feedstock for the manufacture of acid mine drainage (AMD) neutralizing agent.

Assessment of Electric Arc Furnace (EAF) Steel Slag Waste's …

recycling EAF slag in an attempt to reduce the environmental impact caused by this by-product. In this section, a comprehensive assessment of EAF slag recycling options into a green product is presented. A product is considered 'green' if it is made from industrial waste, is non-hazardous, is recyclable, and cheaper in cost [78].

Life Cycle Assessment of Internal Recycling Options of Steel Slag …

The internal recycling process of BOF slag which is one of the huge solid wastes from iron and steel industry was emphasized. Based on the four scenarios of different internal recycling strategies for BOF slag, life cycle assessment (LCA) as a valuable tool for industrial solid waste management was applied to analyze the contribution to reducing environmental …

Recycling of Basic Oxygen Furnace Slag as a Raw Material for …

Abstract:The purpose of this study was to recycle basic oxygen furnace (BOF) slag in the production of autoclaved aerated concrete (AAC), and to examine the influence on the properties of AAC products. The magnetic substances in the BOF slag accounted for about 15 wt.% and the magnetic proportion increased as the particle size decreased.

Recycling of Basic Oxygen Furnace Slag as a Raw Material for

The purpose of this study was to recycle basic oxygen furnace (BOF) slag in the production of autoclaved aerated concrete (AAC), and to examine the influence on the properties of AAC products. The magnetic substances in the BOF slag accounted for about 15 wt.% and the magnetic proportion increased as the particle size decreased. The nonmagnetic portion of the …

Recycling and environmental issues of metallurgical slags and …

In comparison to BF slags, BOF and EAF slags are produced from an oxidation process, thus have higher iron oxides contents. It contains several valuable components: Fe 2–8%, CaO 40–60%, MgO 3–10%, MnO 1–8%. The slag basicity from BOF slag is in the range of 3.5, which is higher than the basicity of EAF slags with a basicity of about 2.0.

A way to use ladle slag to partially replace lime in BOF

Phosphate capacity of BOF slag was calculated and found that it was better ... The low recycling for reuse of LS slag was mainly attri-buted to its volume instability i.e. disintegration of slag du-ring cooling due to phase transformation and wide-ranging slag composition [20]. The disintegration of LS slag is a long

The recycling and reuse of steelmaking slags — A review

This method eliminates free lime from the slag, creating many more possibilities for recycling ( Liu et al., 2016 ). (24)2CaO + xFe2O3 + (1 − x)Al2O3 → Ca2(FexAl1-x)2O5 In the second method, the BOS slag undergoes a carbothermic reduction reaction. The Fe and P phases are reduced along with the CaO.

Recycling of Vanadium-Containing BOF Slag with Agitation …

BOF slag for its recycling needs new investigation and engineering approaches. Technologies of agitation leaching, despite their efficiency, cannot solve the problem by recycling millions of tons of vanadium-con-taining BOF slag worldwide, so it is necessary also to apply heap leaching to solve this global problem.

Recycling of basic oxygen furnace slag in asphalt mixture: …

Recycling of BOF is an important ongoing project world widely. Researchers have been trying to search its value added applications. ... Laboratory investigation of basic oxygen furnace slag for substitution of aggregate in porous asphalt mixture. Constr Build Mater, 23 (1) (2009), pp. 453-461. Article Download PDF View Record in Scopus Google ...

The recycling effect of BOF slag in the portland cement properties ...

The BOF slag is composed by CaO (up to 65%), SiO 2 (10–15%), FeO (about 30%), Fe 2 O 3 (above 20%), Al 2 O 3 (2–17%) and MgO (1–10%). The high CaO content in BOF slag may cause the slag volumetric expansion and disintegration after cement hardening due to the free-CaO hydration reactions, this instability is considered a limiting factor ...

Recycling of Vanadium-Containing BOF Slag with …

Technologies of agitation leaching, despite their efficiency, cannot solve the problem by recycling millions of tons of vanadium-containing BOF slag worldwide, so it is necessary also to apply heap leaching to solve this global problem. This article proposes heap leaching for waste processing.

Strategy Paper On Resource Efficiency in Steel Sector …

7.1 Integrated Steel Recycling & Slag Utilization approach ... Furnace-Basic Oxygen Furnace (BF-BOF) route and Electric Arc Furnace (EAF) and /or Induction Furnace (IF) route. The BF-BOF route (primary sector) caters to around 45% of India's steelmaking capacity, while the remaining 55% is processed through the EAF and IF route, mostly in ...

The recycling effect of BOF slag in the portland cement …

in this context, the goal of recycling bof slag is to minimize the amount of waste sent to landfill, concerning the reduction of the occupied areas and the cost of maintaining these areas; the recovery of iron in the bof slag and the reduction of natural resource extraction by substituting some raw materials in other industrial sectors, as shown …

Slag recycling - recovery

The Waste Framework Directive 2008/98/EC also regulated the recycling of iron and steel slags. Fig. 6 shows the recycling of blast furnace slag for 2018. The production volume was 20.7 Mta, of which 86.0 % was sand slag from slag granulation and 14 % was air-cooled BFS.

Experimental investigations on recycling the BOF-slag by …

Experimental investigations on recycling the BOF-slag by reductive heating and as a medium for CO2 phosphorus and arsenic removal

The recycling and reuse of steelmaking slags — A review

Steel Slag—Its Production, Processing, Characteristics, and Cementitious Properties. Steel slag is a byproduct from either the conversion of iron to steel in a basic oxygen furnace, or the melting of scrap to make steel in an electric arc …

The recycling and reuse of steelmaking slags — A review

The recycling and reuse of steelmaking slags — A review @article{Fisher2019TheRA, title={The recycling and reuse of steelmaking slags — A review}, author={Lucy V. Fisher and Andrew R. Barron}, journal={Resources, Conservation and Recycling}, year={2019} } Lucy V. Fisher, A. Barron; Published 1 July 2019; Materials Science

The recycling effect of BOF slag in the portland cement properties ...

The basic oxygen furnace (BOF) slag use as raw material for cement production carries economic, environmental and technical benefits to, the cement industry, reducing energy costs, material consumption and waste storage areas. This study evaluates the partial replacement of blast furnace slag by BOF slag in the production of slag portland cement.

Improving the BOF Plant - Steel Recycling Project- Edesign 100 - Google

1. Increase Recycling of Slag: Due to the recent increase in demand for steel over the past decade, a lower percentage of BOF slag has been recycled. Therefore, the steel industry must get back into its old habit of recycling BOF slag, especially since great amounts of steel are being produced now more than ever. Slag is basically the scraps left over after the steel …

Recycling of Basic Oxygen Furnace Slag as a Raw Material …

Since most of the current ways of reusing BOF slag are high-cost and low-benefit, the trade market for BOF slag is stagnant, and some surplus slag is now treated and dumped as industrial waste. Therefore, developing a practical and economic recycling method for BOF slag and enhancing the value of slag-derived products are important research ...

Recycling and environmental issues of metallurgical slags …

Roughly BOF slag, EAF slag and SMP slag can be defined as steel slags. Reviewing the past, utilization of ironmaking slag has a long history. The broken slag from ironmaking was already REUTER, M., XIAO, Y., and BOIN, U. Recycling and environmental issues of metallurgical slags and salt fluxes. VII International Conference on Molten

Study on a Recycling Solution of Basic Oxygen Furnace Slag in ...

Basic oxygen furnace slag (BOF slag) contains high amount of useful oxides such as CaO, MgO, SiO2, etc., therefore, a solution of the slag recycling would be used as a flux in pelletizing process. To understand role of slag in the pellet, this research examines the mechanical, chemical and microstructure properties of the pellets containing various amount of the slag.

Reductive Heating Experiments on BOF‐Slag: Simultaneous …

Basic‐oxygen furnace (BOF) slag is the second abundant by‐product from the steel‐making process. It is not readily recycled for high phosphorus content and volume instability. ... To optimize silicate–metal segregation for recycling BOF‐slag, it is suggested (i) bringing the BOF‐slag composition within the low‐temperature side of ...

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