scholarly journals EXTRA-FURNACE STEEL PROCESSING BY RECYCLED SECONDARY ALUMINUM WASTE

2018 ◽  
pp. 100-105 ◽  
Author(s):  
I. V. Tribushevskiy ◽  
B. M. Nemenenok ◽  
G. V. Rumiantseva ◽  
M. A. Kulik
Keyword(s):  
Thermodynamic Analysis ◽  
Breaking Load ◽  
Refining Slag ◽  
Secondary Aluminum ◽  
Drying Time ◽  
Ladle Refining ◽  
Steel Processing ◽  
Furnace Steel ◽  
Calcium Aluminosilicates

The paper presents the results of research on the use of recycled aluminum waste (RAW) during extra-furnace steel processing in ladle refining furnace. It has been established that simultaneously with the deoxidation of refining slags before desulfurization of steel, their liquid mobility increases, which eliminates the need for using fluorspar for these purposes.A thermodynamic analysis of possible reactions of formation of aluminates and calcium aluminosilicates in the refining slag has been carried out. It has been suggested that the cause of thinning of refining slags from the addition of RAW is the formation of a number of low-melting eutectics containing aluminates and calcium aluminosilicates. The composition of briquettes based on RAW for liquefaction of refining slags is proposed. Dependence of the friability and breaking load of briquettes on the content of CaO, the temperature and drying time is established. The data on the composition and properties of the refining slag after treatment with a diluent based on RAW are given.

scholarly journals Using of aluminium slags and products of their pro‑cessing in metallurgical production

2021 ◽  
pp. 42-49
Author(s):  
L. V. Tribushevskiy ◽  
B. M. Nemenenok ◽  
G. A. Rumiantseva ◽  
A. V. Arabey
Keyword(s):  
Chloride Content ◽  
Aluminum Production ◽  
Secondary Aluminum ◽  
Technical Literature ◽  
Metallurgical Production ◽  
Production Wastes ◽  
Steel Processing ◽  
Furnace Steel ◽  
Sodium And Potassium ◽  
Steel Treatment

The work contains the results of the analysis of technical literature and author’s research on the use of aluminium slags and products of their processing in metallurgical production. It has been shown that the bulk of reagents derived from secondary aluminum production wastes (APWs) are used with increased sodium and potassium chloride. This creates some inconvenience for out‑of‑furnace steel treatment due to the increased chloride content in the working area. It is proposed for steel processing to use APWs formed during flux‑free melting or dump aluminium slags. This allows to reduce the content of salt fluxes residues to 1.0–1.5 % and to improve working conditions at ladle furnaces when liquefying refining slags.

scholarly journals The experience of using calcium carbide for the deoxidation of steel to replace aluminum in the conditions of OJSC «BSW – Management company of the holding «BMC»

2020 ◽  
pp. 53-58
Author(s):  
О. M. Grudnitsky
Keyword(s):  
Calcium Carbide ◽  
Steel Grade ◽  
Reinforcing Steel ◽  
Degree Of Contamination ◽  
Secondary Aluminum ◽  
Management Company ◽  
Metallic Inclusions ◽  
Steel Processing ◽  
Furnace Steel ◽  
The Cost

The article deals with issues related to the use of calcium carbide in steelmaking, instead of secondary aluminum and other deoxidizing materials, in order to reduce the cost of deoxidizing steel and slag.It was assumed that reducing the content of aluminum in the metal of the reinforcing steel grade would improve its spillability, and by improving the spillability, the yield of usable metal would increase. It was also expected that as a result of the use of calcium carbide for deoxidizing the coating slag in the ladle, the degree of contamination of cord steel with non-metallic inclusions would decrease.During the tests, the optimal amount of additive material was determined. In General, as a result of the work carried out, it was found that calcium carbide can be used for deoxidation of slag and metal during extra-furnace steel processingThe methods of adding the material are described in detail. The results of this work are presented.

Estimated and experimental determination of the phase composition of out-of-furnace steel processing slags

2019 ◽  
pp. 46-49
Author(s):  
V. V. Kozlov ◽  
A. P. Shevchik ◽  
S. A. Suvorov ◽  
A. V. Ivanov ◽  
N. V. Arbuzova ◽  
...  
Keyword(s):  
Phase Composition ◽  
Experimental Determination ◽  
Steel Processing ◽  
Furnace Steel

Performance of secondary aluminum melting: Thermodynamic analysis and plant-site experiments

Energy ◽  
2006 ◽  
Vol 31 (12) ◽  
pp. 1769-1779 ◽  
Author(s):  
T LI ◽  
M HASSAN ◽  
K KUWANA ◽  
K SAITO ◽  
P KING
Keyword(s):  
Thermodynamic Analysis ◽  
Secondary Aluminum ◽  
Plant Site

Effect of B2O3 and CaF2 on Viscosity of Ladle Refining Slag

2011 ◽  
Vol 295-297 ◽  
pp. 2647-2650 ◽  
Author(s):  
Hong Ming Wang ◽  
Ting Wang Zhang ◽  
Hua Zhu ◽  
Yong Qi Yan ◽  
Yi Nan Zhao
Keyword(s):  
Refining Process ◽  
Slag Viscosity ◽  
Mass Ratio ◽  
Refining Slag ◽  
Ladle Refining ◽  
Ladle Slag ◽  
Viscosity Measurements ◽  
Cylinder Method

To avoid slag sticking onto the snorkel during CAS-OB ladle refining process, B2O3-CaO(mass ratio equals 1:1) and CaF2-CaO(mass ratio equals 1:1) were respectively employed as modifiers added to decrease the viscosity of ladle slag. The rotary cylinder method was adopted in the viscosity measurements. The results showed that the modifiers could decrease the viscosity of ladle refining slag remarkably. At 1500°C, the viscosity of ladle slag without any modifiers is about 6.0 Pa·s. But by adding more than 10mass% CaO-B2O3 or CaO-CaF2, the slag viscosity at 1500°C could be decreased lower than 1.0 Pa·s. The mechanism of modifiers decreasing the slag viscosity was analyzed.

Application of Celox oxygen probes for out-of-furnace steel processing

2007 ◽  
Vol 2007 (8) ◽  
pp. 702-704
Author(s):  
I. V. Zinkovskii ◽  
A. L. Ignatov ◽  
V. V. Kromm ◽  
A. A. Ivanov
Keyword(s):  
Steel Processing ◽  
Furnace Steel ◽  
Oxygen Probes

scholarly journals Chemical Stabilization Features Of Ladle Furnace Slag In Ferrous Metallurgy

2017 ◽  
Vol 2 (2) ◽  
pp. 59 ◽  
Author(s):  
Sheshukov O. Yu. ◽  
Mikheenkov M.A. ◽  
Egiazaryan D.K. ◽  
Ovchinnikova L.A. ◽  
Lobanov D.A.
Keyword(s):  
Ferrous Metallurgy ◽  
Chemical Stabilization ◽  
Ladle Furnace ◽  
Refining Slag ◽  
Processing Methods ◽  
High Calcium ◽  
Steel Processing ◽  
High Degree ◽  
Furnace Slag

<p class="TNR">Nowadays due to the application expansion of secondary steel processing methods, which provide high-degree metal desulfurization, a problem of the ladle furnace slag (or high-calcium refining slag) stabilization arose in the ferrous metallurgy. This slag cannot be stabilized because of its self-disintegrating properties.</p>

scholarly journals MODERN EQUIPMENT FOR REFINING AND CASTING OF STEEL AND ALLOYS IN FOUNDRY PRODUCTION

2018 ◽  
pp. 28-33
Author(s):  
V. I. Zolotukhin ◽  
A. G. Golovko ◽  
E. I. Gordeev ◽  
D. A. Provotorov
Keyword(s):  
Nonmetallic Inclusions ◽  
Metal Stream ◽  
Arc Furnace ◽  
Secondary Oxidation ◽  
Steel Processing ◽  
Complex Technology ◽  
Furnace Steel ◽  
Wire Feeding ◽  
Protection Of The Metal ◽  
Casting Steel

The article deals with the issues of complex technology and equipment for refining and casting steel and alloys in the foundry industry. Solutions are given that make it possible to guarantee a reduction in nonmetallic inclusions in the melt, as well as to solve a number of other related problems of foundry production, such as the introduction of a bottom blowing melt system with an inert gas; the introduction of protection of the metal stream from secondary oxidation; lining the arch of an electric arc furnace, etc. Various types of products and equipment produced by NPP Vulkan-TM are shown: blowing bottom plugs and assemblies, metering nozzles, gas-dynamic protection of the metal stream from secondary oxidation, two-arm wire-feeding machine mod. TAP 2–1 with unwinding device.Advantages of the equipment for steel casting and extra-furnace steel processing are described.

scholarly journals RESEARCH OF BARIUM AND STRONTIUM REDUCTION CONCERNING THE CONDITIONS OF OUT-OF-FURNACE STEEL PROCESSING

2012 ◽  
Vol 55 (4) ◽  
pp. 27-29 ◽  
Author(s):  
V. I. Dmitrienko ◽  
I. D. Rozhikhina ◽  
O. I. Nokhrina ◽  
R. S. Aizatulov ◽  
M. A. Platonov
Keyword(s):  
Steel Processing ◽  
Furnace Steel

scholarly journals Application of ionic theory to calculate sulfide capacity of slags

2021 ◽  
Vol 64 (2) ◽  
pp. 104-111
Author(s):  
A. A. Metelkin ◽  
O. Yu. Sheshukov ◽  
M. V. Savel’ev ◽  
O. I. Shevchenko ◽  
D. K. Egiazar’yan
Keyword(s):  
Aluminum Oxide ◽  
Distribution Coefficient ◽  
Sulfur Removal ◽  
Sulfide Capacity ◽  
Optical Basicity ◽  
Basic Oxide ◽  
Factors Affecting ◽  
Sulfur Distribution ◽  
Steel Processing ◽  
Furnace Steel

The article considers the issues of sulfur removal in the ladle-furnace unit. The sulfur distribution coefficient depends on sulfide capacity of the slag, sulfur activity coefficient, oxidizing potential of the medium and equilibrium constant. The sulfide capacity CS of slags is one of the most important characteristics of refining capacity of the slags used in extra-furnace steel processing. One of the factors affecting the sulfide capacity is temperature. The formula was proposed showing the dependence of sulfide capacity on the optical basicity and temperature, in the temperature range of 1650 – 1400 °C and when the optical basicity Λ is not more than 0.75; the error of the presented formula does not exceed 6 %. The formula for calculating the optical basicity is proposed, which takes into account the influence of basic, acidic oxides and amphoteric oxide Al2O3. It is shown that slags, completely consisting of a homogeneous phase, have an increased optical basicity of aluminum oxide. Heterogeneous slags have a reduced optical basicity of Al2O3 in comparison with homogeneous slags. Perhaps, this fact can be explained by the fact that in homogeneous slags there is a deficiency of the basic oxide CaO and in the conditions under consideration Al2O3 compound begins to exhibit more basic properties than acidic ones, thus, in homogeneous slags, the optical basicity of aluminum oxide is increased and approaches optical basicity of CaO oxide. Calculations carried out on the basis of real heats have shown that with an increase in the content of Al2O3 oxide in the slag, its optical basicity decreases. Known value of the optical basicity makes it possible to determine sulfide capacity of the slag, sulfur distribution coefficient between metal and slag, and, accordingly, final sulfur content in the metal. The research results have shown that it is advisable to apply the ionic theory of slags for the sulfide capacity determination.

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