Improving the BOF Plant - Steel Recycling Project- Edesign 100

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 making process.

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Feasibility Study of Dephosphorization of Slag Generated ...

Abstract Basic oxygen furnace slag (BOF slag) is an unavoidable by-product of steelmaking process of basic oxygen furnace. The main chemical constituents of BOF slag are CaO, FeO, Al 2O 3, SiO 2 and MgO. Due to its high metallic value (FeO: 16 -20%) and lime content (CaO: 45 -50%), it is possible to use in iron making and steelmaking process to ...

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Recycling of the Steelmaking by-products into the Oxygen ...

The paper presents the results of research project directed to the utilization of demetallized steelmaking slag and oxygen converter flue dust in charge of top blowed oxygen converter. The influence of demetallized slag additions on slag regime in converter and chemical composition of final slag is described and discussed.

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Recycling Ladle Furnace Slag as Flux in Steelmaking: A ...

Sep 16, 2019· SSAB EMEA, Lulea, Sweden carried out trials by recycling ladle slag in BOF. They reported 3.5 kg/ton reductions in lime consumption without compromising on de-phosphorization and desulfurization. However, the blowing time increased by 4% …

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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

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National Slag Association Iron and Steel Slag Products ...

Jan 30, 2019· Since 1918, The NSA has promoted the use of Blast Furnace and Steel Furnace Slag. Blast Furnace slag has been called the "All-Purpose Aggregate" as it can be used in all construction applications ...

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SLAG; VALUE ADDED STEEL INDUSTRY BYPRODUCTS ŻUŻEL; …

Granulated BF slag as a replacement to part of ce-ment content of concrete. Slag contains significant amounts of iron units af-ter processing of the slag in order to recovery lower grade metallic and recycles them back to furnace. Recycling of BOF slag into sinter, B.F. and BOF charge. Recycling of LF slag …

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Recycling of steelmaking slag fines by weak ... - DeepDyve

Nov 01, 2014· Read "Recycling of steelmaking slag fines by weak magnetic separation coupled with selective particle size screening, Journal of Cleaner Production" on DeepDyve, the largest online rental service for scholarly research with thousands of academic publications available at your fingertips.

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Steel Slag - Material Description - User Guidelines for ...

Recycling. It is estimated that between 7.0 and 7.5 million metric tons (7.7 to 8.3 million tons) of steel slag is used each year in the United States. The primary applications for steel slag in the United States are its use as a granular base or as an aggregate material in construction applications. Disposal

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Progresses and Future Prospects of Steelmaking Technologies

slag Increase of Hot metal pretreatment efficiency in torpedo car and BOF (FetO) control in hot metal dephosphorizatin in BOF Blasting and slag hot recycling in hot metal desulfurization BOF Increase productivity Tuyer layout in bottom-blowing Secondary refining Gas jet control in vacuum condition Increase of heat capasity Oxy-fuel burner with ...

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BOF and EAF Steels: What are the Differences? – Economics ...

Mar 07, 2016· The article mentioned that the BOF process still has a dominant market share, but most of this stems from what is being demanded by consumers. High quality steels cannot be produced by recycling scrap metal, so EAF can’t even touch this portion of the market share.

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Recycling of ladle furnace slags - Research Online

Recycling of ladle furnace slags Abstract Ferrous industry slag is waste product of all steelmaking manufactures. These materials should be reused or stocked. There is abundant literature on the subject of reuse and recycling of blast furnace(BF), basic oxygen furnace(BOF), electric arc furnace(EAF).

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RECYCLING OF STEELMAKING DUSTS – THE RADUST CONCEPT

converter (BOF) and electric arc furnaces (EAF) have high contents of iron oxides. Due to heavy metals, like zinc and lead as well as alkaline oxides, halides and heavy hydrocarbons, both the recycling and final deposition of fine fractions is problematic. The amount of coarse and fine (sludge,

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Steelmaking Slag Beneficiation by Magnetic Separator and ...

Steelmaking Slag Beneficiation by Magnetic Separator and Impacts on Sinter Quality Ö. S. Bölükbaşı1, B. Tufan1* 1Department of Mining Engineering, Dokuz Eylül University, 35160, Izmir, Turkey Abstract: Basic oxygen furnaces (BOF) slag is the main problem at all iron and steel factories.

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Advances in slag recycling and reuse - UK Essays

In the past, slag was taken from the blast furnace, basic oxygen furnace (BOF), and electric arc furnace (EAF) and hauled off to a hazardous dump site where millions of tons have accumulated. The major waste by product from steel production is slag at 79.15% as shown in 1.

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(PDF) IRON AND STEELMAKING SLAGS: ARE THEY HAZARDOUS …

IRON AND STEELMAKING SLAGS: ARE THEY HAZARDOUS WASTE? ... For BOF steelmaking route, composition of slag depends on the composition of hot metal and …

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Influence of Ladle-slag Additions on BOF-Process …

Additionally, if ladle slag is recycled to the BOF, the amount of burnt lime added can be reduced thanks to the CaO-content in the ladle slag. Furthermore, the recycling of ladle slag to the BOF will induce a three time utilisation of the lime added in secondary steelmaking. First during ladle refining, secondly as recycled slag to the BOF and ...

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Life Cycle Assessment of Internal Recycling Options of ...

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 impacts and resources burdens for ...

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Basic Oxygen Furnace (BOF) slag cooling: Laboratory ...

The recycling of basic oxygen furnace (BOF) slag is largely limited by its free lime and free magnesia content leading to highly problematic swelling, preventing civil engineering applications.

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Economic and environmentally beneficial treatment of …

ECONOMIC & ENVIRONMENTALLY BENEFICIAL TREATMENT OF SLAGS IN DC ARC FURNACES 363 Introduction A common feature shared by all pyrometallurgical smelting processes is the production of slag. Slag is usually a by-product of metal production, although there are processes (such as ilmenite smelting, for example) where the slag is the principal product.

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Treatments and Recycling of Metallurgical Slags | IntechOpen

The coating and foaming practices are very useful in BOF converters and EAF. The ladle slag recycling also represents an important alternative to reduce steelmaking cost, decreasing the consumption of fluorspar and lime (among others metallurgical applications), and get ecofriendly benefits.

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UDC 669 . 054 . 82 : 669 . 184 . 244 . 66 Processing and ...

slag for the purpose of using the iron recovered as a substitute for scrap iron and/or making effective use of the slag for applications where iron would be an impurity. Therefore, after cooling, the steel slag is crushed and the iron is recovered by magnetic separation. In (a) BF slag (b) BOF slag

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Upgrading and recycling metallic steelmaking slag fines ...

Due to a low iron content and a high level of impurities, "metallic" steelmaking slag fines have accumulated on the ground in large quantities.

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CSC Corporate Social Responsibility

BOF slag is a good material for engineering; however, there’s limitation for utilizing BOF slag in engineering because of its material characteristics. CSC positively corresponds with Taiwan government’s policy for promoting the recycled materials utilized in public engineering, and continues to enhance the value-added and utilization way ...

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FACT SHEET Steel industry co-products

the blast furnace (BF) followed by steelmaking in the basic oxygen furnace (BOF), and ironmaking via direct reduction (DRI) followed by steelmaking in the electric arc furnace (EAF). 2. Scrap-based steel accounts for about 30% of global steel production. It is produced by recycling steel in an EAF. The main inputs are recycled steel and ...

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recycling slag bof - ocmd.co.za

recycling slag bof. County Waste and Recycling – Single Stream Recycling . County Waste and Recycling offers easier Single Stream Recycling System to make curbside recycling easier than ever to New York's Capital Region. Life Cycle Assessment of Internal Recycling Options of Steel ...

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Steelmaking Slag - an overview | ScienceDirect Topics

Apr 04, 2012· Ironmaking and steelmaking slags are inevitably generated as a by-product from ironmaking and steelmaking processes. Main components of the slags are CaO, SiO 2, Al 2 O 3, MgO, and iron oxides, and the compositions of slags depend on the process.In the case of Japan, three types of slags, namely BF slag, BOF slag, and EAF slag are mainly produced, which amount is shown in …

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The Effect of BOF Slag and BF Flue Dust on Coal ... - lkab.com

basic fluxes—BOF slag, burnt lime and burnt dolomite— ... Injection into a BF of BOF slag to improve the slag formation and of BF flue dust to improve the recycling of in-plant fines has previously been tested. The effects on the PC combustion efficiency at different condi-

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ITP Steel: Recycling and Reuse of Basic Oxygen Furnace ...

project fact sheet recycling and reuse of basic oxygen furnace (bof)/basic oxygen process (bop) steelmaking slags new technologies and methodologies may allow value- added utilization of steelmaking slag thus reducing waste and use of landfills, and saving energy office of industrial technologies energy efficiency and renewable energy • u.s. department of energy

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Cutting-Edge By-Product Recycling | Primetals Technologies

Ferrous briquetting – Recycling of by-products. Our solution for recycling of the by-products uses a cold briquetting process, with proven equipment and application of a suitable binder selected for each application, to ensure highest possible product quality of briquettes that can be charged into a DRI plant, blast furnace, Corex or LD (BOF) converter.

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(PDF) RECYCLING OF STEELMAKING SLAG | PANKAJ NARAYAN ...

While the usage of blast furnace slag is well established in the area of cement making, recycling of steelmaking slag is still a challenging task. About 150-180 kg steelmaking slag is generated per ton of steel depending upon the quality of hot

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Industrial uses of slag—The use and re-use of iron and ...

INDUSTRIAL USES OF SLAG—THE USE AND RE-USE OF IRON AND STEELMAKING SLAGS 57 Introduction Throughout the ages, slags have been used to refine metals ... slag, environment, iron, steel, recycling, blast furnace, steelmaking, ladle metallurgy, slag splashing, construction. ... has led to a significant reduction in the generation of BOF slag ...

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

The recycling effect of BOF slag in the portland cement properties. Author links open overlay panel S.Z. Carvalho a F. Vernilli a B. Almeida a M. Demarco b S.N. Silva b.

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