intensity of steelmaking slag

intensity of steelmaking slag

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

Slags, steelmaking - Substance Information - ECHA

Depending upon the particular steelmaking operation, the slag is composed primarily of sulfur and oxides of aluminum, calcium, iron, magnesium, manganese, phosphorus, and silicon. Regulatory process names 2 CAS names 1 IUPAC names 11 Trade names 19 Other identifiers 1 .

Slag in Steelmaking - AF Chemicals

Slag in Steelmaking; Slag Slag is the (lighter) dross solution that floats on top of the (heavier) molten steel that needs to be separated during refining. Slag mostly originates from: slag forming additives (lime and fluxing agents) byproducts of steel deoxidation products (Al 2 O 3, MnO, SiO 2)

Chemical, Mineralogical, and Morphological Properties of ...

Steel slag is a byproduct of the steelmaking and steel refining processes. This paper provides an overview of the different types of steel slag that are generated from basic-oxygen-furnace (BOF) steelmaking, electric-arc-furnace (EAF) steelmaking, and ladle-furnace steel refining processes. The mineralogical and morphological properties of BOF and electric-arc-furnace-ladle [EAF(L)] slag ...

Role of Slag in Converter Steelmaking – IspatGuru

Aug 01, 2015  Slag is a generic name and in steelmaking it is mostly a solution of oxides and sulphides in the liquid state and the multi-crystalline phases in the solid state. Slag is a separate phase than liquid steel since (i) it is lighter than the liquid steel, and (ii) it is immiscible in the liquid steel.

FeO content estimation in steel slag using Raman ...

Steel slag content is studied using several methods, in order to obtain information about the steel quality and the effectiveness of steelmaking process. Raman spectroscopy provides detailed information about the material content of the slag. The intensity of Raman scattered radiation refers to the concentration of a particular compound in the ...

Slag Foaming Fundamentals - A Critical Assessment

Slag foaming is part of steelmaking process and could bring several benefits: it helps to save energy, improves productivity, enhances the refractory service life, decreases noise pollution and protects the bath from nitrogen incorporation. Unfortunately, slag foaming is a highly dynamic process that

Recycling of steelmaking slag fines by weak magnetic ...

Nov 01, 2014  Test results of separating steelmaking slag fines with the pilot-scale magnetic drum separator. Test results from magnetic separation of steelmaking slag fines with hand-held magnets showed that significant separation occurred when surface magnetic field strengths of the magnets were below 1000 G, and especially when the strengths were below 500 G.

(PDF) Fundamentals of steelmaking metallurgy Chapter1

A detailed background reading material on thermodynamic fundamentals related to dilute solutions in steel, optical basicity, ionic theory of slag, cell model of slag, and molecular theory of slag ...

Application of Magnetic Separation to Steelmaking Slags ...

Steelmaking slag fines are leftover materials generated in routine slag processing and their particle sizes are usually smaller than 12.5 mm. ... High intensity dry magnetic separators are gaining ...

Steelmaking Slag - Optimus

Steelmaking Slag Safety Data Sheet according to Federal Register / Vol. 77, No. 58 / Monday, March 26, 2012 / Rules and Regulations Date of issue: 04/10/2018 Revision date: 04/10/2018 Version: 1.0

Slag in Steelmaking - AF Chemicals

Slag in Steelmaking; Slag Slag is the (lighter) dross solution that floats on top of the (heavier) molten steel that needs to be separated during refining. Slag mostly originates from: slag forming additives (lime and fluxing agents) byproducts of steel deoxidation products (Al 2 O 3, MnO, SiO 2)

Slag foaming practice in the steelmaking process ...

Jun 01, 2018  Nowadays slag is considered an essential component in iron and steelmaking processes, due to its direct contact with the metal baths, refractories and the environment of the equipment. By definition, slags are total or partial liquid solutions comprised by oxides and fluorides (usually a mixture of CaO-MgO-SiO 2 -FeO-Al 2 O 3 -CaF 2 ) that can ...

Role of Slag in Converter Steelmaking – IspatGuru

Aug 01, 2015  Role of Slag in Converter Steelmaking. satyendra; August 1, 2015; 0 Comments ; Basicity, Calcined dolomite, converter, Foaming, lime, lining, slag, slag splashing, Spitting,; Role of Slag in Converter Steelmaking. The oxygen converter process is the primary steelmaking process for the production of carbon and low-alloy steels.

Dissolution Mechanisms of Steelmaking Slag–Dredged Soil ...

steelmaking slag can enhance the growth of photoplankton, while the dissolution behaviors and mechanisms of nutrient elements from the steelmaking slag–dredged soil mixture still need to be clarified for more efficient application. In the current research, the variation of pH and disso- ... Intensity (a.u.) ...

Quantitative Determination of Free Lime Amount in ...

Steelmaking slag is a by-product of steel making. It has been reused as a material for civil engineering, pavement construction etc.For such applications, it is extremely important to evaluate the amount of free lime, which has the chemical form of calcium monoxide (CaO) and can cause the failure of mechanical properties by volume expansion through absorption of water or carbon dioxide gas.

steel making slag iron magnetic field intensity in us

steel making slag iron magnetic field intensity in us; steel making slag iron magnetic field intensity in us. Patent US20140166787 - Processing of steel making slag - Google ... 19 Jun 2014 ... A system for processing slag material from a steelmaking process ... 12/898,276 filed Oct. 5, 2010, which is a Continuation-in-Part of U.S. patent ...

Energy intensity and greenhouse gases footprint of ...

B oth energy intensity and greenhouse gas footprint are evaluated for the three technologies of interest. 2. Electric Furnace Based Steelmaking and CRISP Technology Steel manufacturing has been the pioneer industry in energy efficiency, reducing its energy intensity 55 percent from 1970 to 2000 [3].

MARINE DRIVE PROTECTION BY FORMATION OF SEA FOREST ...

Steel slag is classified into two types according to production process: steelmaking slag and blast-furnace slag. In Bangladesh we get around 1, 20,000-1, 60,000 tons of steelmaking slag in every year .Efficient recycling of steelmaking slag has not in concern in our country. We have

High Efficient Blowing Technique for Large and Medium ...

Feb 01, 2010  The high efficient blowing technique includes increasing oxygen supply intensity and optimizing slag forming. The oxygen supply intensity on 300 t converters of No. 1 steelmaking shop at Baosteel reaches 3.83 m 3 /(t min), and at Taiyuan Steel, Lianyuan Steel, Pingxiang Steel and other steel plants, the oxygen supply intensity on medium converters is in the range of 4.0–4.4 m 3 /(t min).

US4009024A - Process for regeneration and reuse of ...

A process for the regeneration of slag involves treating the slag after the steel has been removed from the steelmaking heat. Oxygen and a fluid hydrocarbon fuel are lanced into the molten slag to reduce metal oxides in the slag to their metallic state and to purify the slag. After the treatment, the metal constituents are removed from the slag treating vessel and the molten slag can be used ...

AISI Electric Arc Furnace Steelmaking

melt-in. The partition of phosphorus in the slag to phosphorus in the bath ranges from 5 to 15. Usually the phosphorus is reduced by 20 to 50 % in the EAF. Sulfur is removed mainly as a sulfide dissolved in the slag. The sulfur partition between the slag and metal is dependent on slag chemistry and is favored at low steel oxidation levels.

Steelmaking - Wikipedia

Steelmaking is the process of producing steel from iron ore and/or scrap.In steelmaking, impurities such as nitrogen, silicon, phosphorus, sulfur and excess carbon (the most important impurity) are removed from the sourced iron, and alloying elements such as manganese, nickel, chromium, carbon and vanadium are added to produce different grades of steel. ...

Possible Uses of Steelmaking Slag in Agriculture: An

Steelmaking slag deriving from BOF process (using the Linz-Donawitz (LD) converter) comes from the pig iron refining process, wh ich converts molten pig iron and steel scraps into high quality steel. Most slags from steel pl ant derive from this pr ocess, with an average of 150-200 kg of slag generated per tonne of st eel produced.

Continuous steelmaking: the balance between intensity and ...

counter curtznt flow of slag and metal a launder, would seem to be closely linked resolving this issœ of productivity and ptoœss intensity. 2 CONSIDERATIONS The development of WORCRA echnology cúcid with of the hearth sæelmaking and the riœ of oxygen steelmaking which utilized high levels of gas to produœ rapid stirring ard very fast ...

Effect of MgO and Al2O3 variations in oxygen steelmaking ...

intensity of bottom stirring, lance height, oxygen flow rate, addition scheme and timing of addition of fluxes and iron ore. Therefore, each plant usually develops its own blowing ... 3 variations in oxygen steelmaking (BOF) slag on slag morphology and phosphorus distribution.

Generation of iron and steel slag : NIPPON SLAG ASSOCIATION

Steelmaking slag is generated by the process that turns pig iron produced by a blast furnace into tough and highly workable steel. Converter slag is the oxidized material that is generated when lime and other auxiliary materials are added and oxygen is blown onto the pig iron in order to remove carbon, phosphorous, sulfur, and other components ...

Ground improvement : Iron and steel slag products : NIPPON ...

Steelmaking slag also forms shapes with many edges and rough surfaces, giving it characteristics that are similar to natural crushed stone or sand. The particle density is 3.3 - 3.6 g/cm 3 , which is higher than natural stone materials, and the material is heavy, with a unit mass of 21 - 23 kN/m 3 when moist or 14 - 16 kN/m 3 in water.

Synthetic Slag for Secondary Steelmaking – IspatGuru

Mar 28, 2017  Synthetic slag practice is normally used to obtain clean steels and also for the desulphurization of the liquid steel. Secondary steelmaking is a critical quality control step between the primary steelmaking and the continuous casting of the liquid steel. A key feature for success with the secondary steelmaking processes is the slag control.

A New Lance Design for BOF Steelmaking

The formation of a liquid slag with the right compo-sition such as basicity and FeO content is the foremost important step in the LD steelmaking process, because dephosphorization depends on the composition of the slag, the temperature, and the kinetics and mass transfer achieved through mixing of liquid metal and slag.

steel making slag iron magnetic field intensity in us

steel making slag iron magnetic field intensity in us; steel making slag iron magnetic field intensity in us. Patent US20140166787 - Processing of steel making slag - Google ... 19 Jun 2014 ... A system for processing slag material from a steelmaking process ... 12/898,276 filed Oct. 5, 2010, which is a Continuation-in-Part of U.S. patent ...

Decarburization and Melting Behavior of Direct-reduced ...

Pellets in Steelmaking Slag Erfan Sharifi Kiasaraei Master of Applied Science Department of Materials Science and Engineering University of Toronto 2010 Abstract An experimental study was undertaken to quantify the rate of DRI decarburization in a steelmaking slag using the constant–volume pressure increase technique.

Tata Steel - Natural capital

Blast furnace slag and steelmaking (LD) slag utilisation: Annually, Tata Steel handles ~17 MnTPA of by-products, which are converted and sold across 20+ product categories. The key solid waste generated during an integrated steel plant operation are the blast furnace and LD slag, which, if not utilised would require to be stored in engineered ...

The Effect of Fluorspar in Steelmaking Slags - Metalurgia

In contrast, the addition of CaF2 to a stiff high-Alumina slag will only slightly increase the fluidity of the slag (liquid CaF2), since CaF2 has a limited effect on the solubility of CaO in these slags. 4 Fluorspar should never be added in the stir-eye of a ladle, but instead to the bulk of the slag (middle of the ladle).

Quantitative Determination of Free Lime Amount in ...

X-ray diffraction patterns of the steelmaking slag samples. Step 0.02 deg, Counting time 3 s. Fig. 2. X-ray diffraction patterns of three different steelmaking slag samples. (a) steelmaking slag stabilized by carbon-ation, (b) steelmaking slag stabilized by hot steam, and (c) as received.

AISI Electric Arc Furnace Steelmaking

melt-in. The partition of phosphorus in the slag to phosphorus in the bath ranges from 5 to 15. Usually the phosphorus is reduced by 20 to 50 % in the EAF. Sulfur is removed mainly as a sulfide dissolved in the slag. The sulfur partition between the slag and metal is dependent on slag chemistry and is favored at low steel oxidation levels.

Steel - Electric-arc steelmaking Britannica

However, electric-arc steelmaking is not as oxidizing, and slag-metal mixing is not as intense; therefore, electric-arc steels normally have carbon contents higher than 0.05 percent. In addition, they usually have a higher nitrogen content of 40 to 120 parts per million, compared with 30 to 50 parts per million in basic-oxygen steels.

(PDF) Rapid and Simple Identification of Free Magnesia in ...

amounts of steelmaking slag, which is a byproduct from the conversion of carbon-rich molten 33 iron to steel in basic oxygen and an electric arc furnaces, are produced globally.