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Desphosphorization in ironmaking and oxygen steel making Page 1 of 42 Desphosphorization in ironmaking and oxygen steelmaking Authors: Saqlain, Muhammad a; Muhammad Owais a; Järvinen, Mika ; Visuri, Ville-Valtterib; Fabritius, Timob a Thermodynamics and Combustion Technology group, Department of Mechanical Engineering, Aalto University, P.O box. 14400- FI00076, Sähkömiehentie .
Conceptualized flowsheet of two-way valorization of blast furnace slag. Recent works on the production of PCC from steelmaking slags,,, have primarily focused on converter slag (also known as Basic Oxygen Furnace (BOF) slag), as this residue is in pressing need of new valorization routes.
Slag disposal is a huge problem to the steel industry, typically, 400 Mt of slag is produced annually worldwide, whereas the EU annual sha re is a lmost 50 M t [8]. Slag produced
Nov 22, 2013· blast furnace, CO, Reaction, slag, Chemistry of the Ironmaking by Blast Furnace Process. Liquid iron (hot metal) is produced in a blast furnace from the burden materials through a series of chemical reactions which are taking place at various levels in a blast furnace. ... CO would be regenerated and its concentration is raised to 90 %, so that ...
Thermal conductivities of Na 2 O–CaO–SiO 2 slags have been determined using the non-stationary hot wire method over a wide temperature range between room temperature and 1773 K, to propose a prediction equation for the thermal conductivities of this slag system. Samples used were xNa 2 O–yCaO–zSiO 2 (x+y+z=100 mol-%), where 5
The high phosphorus content in BOF slag makes it difficult to recycle it as a flux for ironmaking and steelmaking processes because the phosphorus will revert back to the metal.
Effect of Alkalis on Ironmaking Process in a Blast Furnace. satyendra; March 27, 2020; ... a part of alkali in the slag is reduced generating alkali vapour which ascends with the surrounding gas. The alkali vapour condenses in the upper part of the BF where a part leaves with the top gas, while the remaining condenses on the inner walls or on ...
Sulphur removal in ironmaking and oxygen steelmaking Frank Nicolaas Hermanus Schrama a,b, Elisabeth Maria Beunder b, Bart Van den Bergc, YongxiangYang a and ... sulphur concentration in the slag. For the HMD and the SM, it is assumed that all sulphur that is measured at the station's
Rec. slag 0.003 Off-gas 0.035 Additions 0.002 Off-gas 0.006 Additions 0.016 Slag 0.028 Slag 0.002 Slag 0.033 Scrap 0.094 Steel 0.091 Steel 0.091 Steel 0.057 HM slag 0.036 Balance 0.022 HM 0.028 Total 0.176 0.176 0.096 0.096 Schrama Sulphur removal in ironmaking and oxygen steelmaking 334 Ironmaking and Steelmaking 2017 VOL 44 NO 5
(2020). Influence of slag temperature on phosphorus enrichment in P-bearing steelmaking slag. Ironmaking & Steelmaking. Ahead of Print.
The primary purpose of the present work is to compute the volume and composition of the products of a theoretical charring unit for high volatile coals. In particular, the compositions of volatile gas and char and the hydrogen yield of the process. The volume of oxygen necessary to supply the energy for the process was also calculated. The model consists of materials and energy balance ...
tO content and the slag basicity, (mass% CaO)/(mass% SiO 2) in the slag basicity less than 2.0 and they were compared with the change of the MgO solubility with increasing MnO concentration in the slags. The present data were temperature-extrapolated to those at 1873K and compared with the previ-ously reported MgO solubilities in steelmaking slags.
Ironmaking Dewatering Process The granulated slag and water mix is distributed evenly over the whole length of the drum. Axial vanes inside the drum continuously lift the slag sand onto a conveyor belt for immediate evacuation. The fine mesh on the exterior of the drum retains the slag sand and allows the water to filter through. The slag
(2016). Thermodynamic design of electroslag remelting slag for high titanium and low aluminium stainless steel based on IMCT. Ironmaking & Steelmaking: Vol. 43, No. 7, pp. 517-525.
Kinetic experiments were performed in an induction furnace to investigate the reduction of chromite ore by carbon dissolved in a high carbon ferrochromium alloy melt under conditions of varying Cr 2 O 3 concentration, slag basicity, and temperature. The results obtained show that chromite reduction by dissolved carbon in slag systems of the type MgO-CaO-SiO 2-FeO-Cr 2 O 3 - Al 2 O 3 occurs ...
The potential for slag to reduce CO 2 emissions in the iron and steelmaking industry through CO 2 mineralization has long been recognized. Direct, gas-solid CO 2 mineralization has major benefits of simplicity, cost, and CO 2 accounting but has been historically plagued by 'slow kinetics'.
Na 2 O in the slag will volatilize with high temperatures and reducing conditions. Furthermore, based on experimental data for the sulfur distribution ratio between CaO-SiO 2-Al 2 O 3-Na 2 O-TiO 2 slag and the carbon-saturated iron, the following fitting formula is obtained: log L S = 45.584 Λ + 10568.406 − 17184.041 Λ T − 8.529 Full article
Coal-based direct reduction of nickel slag and magnetic separation of iron are effective methods of secondary resource utilization. The growth characteristics of metallic iron particles in this process are of great significance for subsequent grinding and magnetic separation process. The nickel slag is mixed with coal powder and other additives in a certain proportion, and then subjected to a ...
Formation of 2CaO·SiO 2 that has high melting point will give negative effect to molten slag formation during ironmaking process and enhancing the dissolution of SiO 2 into CaO–FeO liquid phase is crucial. ... SiO 2 concentration in the liquid was low and the composition was .
Apr 21, 2016· Further, the slag chemistry has a strong impact on the activity of FeO in the slag, which impacts the yield at the end of ironmaking and steelmaking. It is important to understand how the slag chemistry and structure affect slag–metal reaction equilibria as well as slag properties such as viscosity, density, and conductivity.
The removal of sulphur is based on one principle: to move the dissolved sulphur from the iron to the slag, after which the slag layer is separated from the metal. This leads to the following reaction, for the sulphur transfer between the metal and slag 2, 9 : (1) The equilibrium constant of this equation ( K 1 ) can be written as (2) where a x ...
Jan 01, 2014· The final slag runs along with the molten iron into the hearth. Iron droplets pass through the slag layer to form the molten hot metal pool. During this passage, the slag reacts with the metal, and transfer of Si, Mn, and S occurs between the metal and the slag, tending to attain equilibrium.
Aug 07, 2015· Slag and its Role in Blast Furnace Ironmaking. satyendra; August 7, 2015; 0 Comments ; alumina, Basicity, BF slag, Flowability, silica, slag, viscosity,; Slag and its Role in Blast Furnace Ironmaking. Blast furnace (BF) is the oldest (more than 700 years old) of the various reactors which are being used in the steel plants.
Ironmaking Slag Granulation with Continuous Dewatering and Pollution Control Slag Granulation with the INBA Dewatering System Molten slag is often considered as a waste material when it is cast into slag pits.
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