eaf gas quenching steel slag

Treatment and characterisation of electric arc furnace ...

 · Electric Arc Furnace slag from an integrated steel plant has been characterised for its physico-chemical and mineralogical properties. It is classified as low to medium reactivity slag, based on its chemical composition (basicity) and phase assemblage. The melt-quench treatment in a graphite lined furnace failed to yield improved glass content.

Steel Slag

Steel slag can also be produced by smelting iron ore in a basic oxygen furnace. According to methods for cooling molten steel slag, steel slag is classified into five types: natural air-cooling steel slag, water-spray steel slag, water-quenching steel slag, air-quenching steel slag, and shallow box chilling steel slag …

A Study of EAF High-Chromium Stainless Steelmaking Slags ...

A good slag practice is essential for production of a high-quality stainless steel. In addition, the electrical and material efficiency of the electric arc furnace (EAF) can considerably be improved by a good slag practice. The metallurgical properties of the slag are strongly influenced by …

Environmental compliance and profitable steelmaking ...

Selling the slag products and using the magnetic parts results in a net profit which makes slag treatment interesting not only for environmental but also for economic reasons. 2.3.2 DUST For each ton of produced steel 15-20 kg of dust are generated. The main components of the EAF dust at BSW are: Zinc 25 %- 30 % Iron 10 % - 40 %

Chemical characteristics of iron and steel slag : NIPPON ...

The primary components of iron and steel slag are limestone (CaO) and silica (SiO 2).Other components of blast furnace slag include alumina (Alsub>2 O 3) and magnesium oxide (MgO), as well as a small amount of sulfur (S), while steelmaking slag contains iron oxide (FeO) and magnesium oxide (MgO) the case of steelmaking slag, the slag contains metal elements (such as iron) in oxide form ...

Recommended technologies for energy

EAF dust and slag recycling system by oxygen-fuel burner - Zn recovery rate will be expected to be 95% - Fe in EAF dust cannot be recovered as metal - - --- Zn material and concrete aggregate can be gained from EAF dust-C-2 EAF slag agglomeration for aggregate use - Molten slag is rapidly cooled by jet air, and becomes 0.5 - 3.0 mm heavy and ...

Sorel Forge

Electric Arc Furnace (EAF) Melting At Finkl Steel - Sorel, our 45-ton electric arc furnace gives us the flexibility to custom-melt a wide range of carbon, alloy, mold and tool steel grades. At this step, we build a charge of solid steel scrap material from controlled sources and convert them into a liquid bath.

Understanding Electric Arc Furnace Steel Making Operations

 · During slag foaming, slag may overflow the sill level in the EAF and flow out of the slag door. The typical composition of EAF slag is CaO -45 % to 58 %, SiO2 – 5 % to 15 %, FeO- 10 % to 28 %, MgO 5% to 8%, and MnO – 2 % to 5 % sides it also contains CaF2, S, and P. Tapping of liquid steel

Off‐Gas Waste Heat Recovery for Electric Arc Furnace ...

 · In addition to the off-gas waste heat flow, the amount of electric arc furnace dust (EAFD) must be considered for the process design. The reference steel plant has a dust load of 20 g · m − 3 (STP) after off-gas quenching, which results in an average mass flow of 580 g EAFD · s −1 .

Dry Granulation of Blast Furnace Slag | Steel360 News

 · Also a significant off-gas temperature increase could be measured. With the obtained data, process optimization can be done and a scale up for further investigations can be realized in the future. Using dry slag granulation at integrated steel plants will gain access to the sensible heat of the BF slag.

Effect of Direct Reduced Iron (DRI) on Dephosphorization ...

steel(+ DRI) under an Ar-3 pct H 2 gas mixture atmosphere. After EAF slag addition, metal and slag samples were taken at various time intervals (5, 10, 30, and 60 minutes). Slag samples were collected by dipping the tip of a stainless steel rod into the slag layer only, followed by quenching …

G/SA

performed, simultaneously, at the EAF Before Slag Quenching (BSQ) and Slag Quenching Alone (SQA) sampling locations at the Baghouse Inlet, the Slag Pit and the Baghouse Outlet (Exhaust Stack), which shall include complete, individual process heat cycles per test run. 3.

The effect of chemical composition on the leaching ...

The basic oxygen furnace (BOF) and electric arc furnace (EAF) slag samples were collected from the seven large steel making factories of Vietnam and brought back to evaluate leaching amount from ...

Recycling and environmental issues of metallurgical slags ...

slag. The BF slag accounts for about twice the amount of BOF slag, and the SMP slag is relatively less significant in terms of utilization due to the lower generated amount. Roughly BOF slag, EAF slag and SMP slag can be defined as steel slags. Reviewing the past, utilization of ironmaking slag has a …

The State–of-the-Art Clean Technologies (SOACT) for ...

The State–of-the-Art Clean Technologies (SOACT) for Steelmaking Handbook (2nd Edition) . December 2010 . Raw materials through Steelmaking, …

Analysis of Energy Balance for a Steel Electric Arc Furnace

It is a fact that steel industry contributes significantly to the CO2 emissions due to anthropogenic activities [3, 4]. Kuramochi [5] pointed out that higher costs for carbon emission certificates drive the steel industry towards the electric arc furnace route, due to lower total

Furnace Fume Extraction Systems (Furnace Air Pollution ...

From many industrial operations fumes can be generated during processing with Induction Furnace, AOD Furnace, EAF Furnace, ARC Furnace, SMS Plant, SAW Welding, SMAW Welding, TIG Welding, MIG Welding, Brazing, Oil Quenching, Dipping, Boiler, Cupola Furnace, Gas Cutting, Robotic Welding, Spot Welding, Buffing, Grinding or any other process.

20 MEXICAN STEEL FORUM STEEL CANCUN, MEXICO 28-30 …

BOF GAS CLEANING PLANT GREEN STEEL ENVIRONMENTAL SOLUTIONS ZERO-EMISSION TOTAL RECOVERY SCRAP SHREDDING PLANT . ... > 200,000 tons / year EAF slag > 3% recovered scrap ... 1 Quenching tower 2 Injection of activated coal 3 Sound proofing of bag filter

Tools & Equipment – Badische Stahl Engineering

Optimising the electrical energy and adding chemical energy are major steps for maximum efficiency in EAF steel production. The energy input concept by BSE represents a system family of sidewall and slag door input devices for chemical energy, current conducting electrode arms, hard- and software for measurement, control and analysis plus decades of experience in EAF steel production.

CO 2 abatement in the iron and steel industry

CDQ coke dry quenching CFB circulating fluidised bed ... tcs tonnes of crude steel TGR top gas recycling thm tonne of hot metal ... or electric arc furnace (EAF), producing liquid steel. CO 2abatement measures and technologies for BOFs and EAFs are covered in Chapters 7 and 8, respectively. Recycling wastes generated within and outside the ...

(PDF) Characteristics of steel slag under different ...

 · 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 …

Thermodynamic Calculations Predicting MgO Saturated …

Keywords: EAF, MgO saturated slags, Thermodynamic calculations Abstract Foamy slags are widely used in EAF steel production because the use of these slags result in energy savings, productivity improvements, and enhanced refractory service life. Foamy slag requires the control of slag viscosity to sustain gas bubbles during processing. This is

Quenching

In materials science, quenching is the rapid cooling of a workpiece in water, oil or air to obtain certain material properties.A type of heat treating, quenching prevents undesired low-temperature processes, such as phase transformations, from occurring. It does this by reducing the window of time during which these undesired reactions are both thermodynamically favorable, and kinetically ...

12.5 Iron And Steel Production

The production of steel in an EAF is a batch process. Cycles, or "heats", range from about 1-1/2 to 5 hours to produce carbon steel and from 5 to 10 hours or more to produce alloy steel. Scrap steel is charged to begin a cycle, and alloying agents and slag materials are added for refining. Stages

Slag Evaluation to Reduce Energy Consumption and EAF ...

The slag foaming quality is an important factor to be studied in steel production in EAF process. The foamy slag contributes to reduce energy costs as it ensures that the heat from the liquid bath is not lost through the EAF walls. Furthermore, if a good slag foaming is ensured, energy efficiency of the furnace increases. Also, there is a

GENERAL INFORMATION Iron & Steel Slags ...

Processed steel slag is strong, hard, durable, dense and roughly cubical particles which make it especially suitable for use in road construction. Not all steel slag is expansive, but water quenching is the first step in weathering of steel slag which may be essential to provide a stable, non-expansive construction material. In the cooling process,

Carbon Injection into Electric Arc Furnace Slags

In the EAF process, carbon, in the form of coke or coal, is injected into molten slag in the late stages of scrap melting. This carbon reacts with iron oxide in the slag, creating gas, which causes slag foaming. The kinetics of oxidization of carbonaceous materials have been extensively studied by Turkdogan et al., 1968; Turkdogan and Vinters, 1969

Structure characterization and grinding performance of gas ...

 · Gas-quenched steel slag abrasive was obtained by gas quenching with high-temperature liquid steel slag as raw material. The phase composition, thermal properties, micromorphology, magnetic properties, and mechanical properties of the particles were characterized by using an X-ray diffractometer, a differential thermal analyzer, a scanning electron microscope, a magnetic property …

Effect of CaF 2 on Phosphorus Refining from Molten Steel ...

 · The effect of CaF2 addition on dephosphorization reaction between molten steel and electric arc furnace (EAF) slag using direct reduced iron (DRI) at 1823 K (1550 °C) was investigated. Basicity, the thermodynamic parameter affecting the removal capacity of phosphorus (i.e., phosphate capacity), decreased using DRI due to an increased SiO2 concentration in the slag.

Treatments and Recycling of Metallurgical Slags | IntechOpen

 · In this case, slag constitutes a good raw material for cement production and also contributes with Fe addition to the clinker. A great part of the steel produced in the world is obtained through electric arc furnace (EAF), the process involves the use of scrap metal and reduces the CO 2 emissions. EAF slags present great possibilities of ...

Electric Arc Furnace Process

When phosphate rock, phosphorus concentrate, and fluxes are smelted in an electric arc furnace under temperatures of 1400–1500 °C (2552–2732 °F), molten slag is formed and tapped out from the furnace and goes through an air-cooling or water quenching process. The elemental phosphorus is separated from the impurities during the slagging ...

Comparison of the mineralogy and microstructure of EAF ...

EAF stainless steel (EAF S) slags are a by-product of the primary steel-making process in an electric arc furnace (EAF). The annual amount of produced EAF S slags in the Europe in year 2010 was 1.74 million tonnes [1], which present enormity annual quantities for dumping. In spirit of zero-waste assessment the

Slag

Slag is the glass-like by-product left over after a desired metal has been separated (i.e., smelted) from its raw ore.Slag is usually a mixture of metal oxides and silicon dioxide.However, slags can contain metal sulfides and elemental metals. While slags are generally used to remove waste in metal smelting, they can also serve other purposes, such as assisting in the temperature control of ...

Iron Steel

gas in miscellaneous combustion units (40 percent) and steel production in the EAF (10 percent). For Coke facilities, the battery stack is the highest source with over 95 percent of …

Manipulators for Temperature & Sampling for EAF

Heat treatment furnace with quenching line (water and oil) ... oxygen and carbon contents and take samples inside the electric arc furnace in a fully automatic way. Measurements are carried out by consumable cartridges introduced into the furnace through the slag door. The machine consists of a steel column fixed on the working platform close ...

Liquid Steel Yield in EAFs – A Lean Operations Perspective ...

 · The EAF slag has been seen to have higher FeO% compared to oxygen converters. This is a direct consequence of lower stirring energy inherent in the EAF process (Figure 8) Figure 8: Relation between FeO% and C% in steel at tap in EAF compared to BOF and Q-BOP (Source: E. T. Turkdogan)