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.

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 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.

Evaluation of Degradation Causes of the Forged Rotors Made of NiCrMo Steel Grade

2014 ◽  
Vol 782 ◽  
pp. 227-230
Author(s):  
Petr Jonšta ◽  
Roman Heide ◽  
Irena Vlčková ◽  
Miriam Gabčová ◽  
Zdenĕk Jonšta ◽  
...  
Keyword(s):  
Steel Grade ◽  
Excessive Amount ◽  
Steam Turbines ◽  
Electron Microscopic ◽  
X Ray ◽  
Metallic Inclusions ◽  
Casting Ladle ◽  
Nicrmov Steel

Contamination of steel by excessive amount of non metallic inclusions leads tosignificant deterioration of its quality and consequent degradation. Cause of degradation of forgedrotors for steam turbines made of NiCrMoV steel grade is examined in this paper. Metallographicand electron-microscopic analyses were performed, including X-ray microanalysis for detecting thepurity of the forging being examinated. Concurrently, the consequence of failed technologicalproduction process, namely the influence of broken brick for argon blowing at the casting ladle, wasalso examined.

Determination of Some Mechanical Properties of Welded Reinforcing Steel with Self-Shielded Wires by Vibration Tests

2014 ◽  
Vol 1029 ◽  
pp. 206-211 ◽  
Author(s):  
Liviu Bereteu ◽  
Mircea Burcă ◽  
Raul Moisa ◽  
Dorin Simoiu ◽  
Gheorghe Drăgănescu ◽  
...  
Keyword(s):  
Mechanical Properties ◽  
Welding Process ◽  
Steel Reinforcement ◽  
Reinforcing Steel ◽  
Coated Electrode ◽  
Major Disadvantage ◽  
Steel Bars ◽  
Vibration Tests ◽  
The Cost

Reinforced concrete is a material formed by pouring concrete over reinforcement steel bars and wires and sometimes by a polymer that turns by drying in a hard and rigid composite. Welding of steel reinforcement concrete is a relatively difficult operation and with a large amount of work, given by the large number of welds that are needed and when this work is make in site conditions. The most common method of steel reinforcement welding is manual welding with coated electrode. The major disadvantage of this process is low productivity in welding effects on execution time, and the cost of welding. An alternative to manual welding with coated electrode for steel reinforcement welding on site is the welding process with self-shielded tubular wires.The aim of this paper is to determine the mechanical properties of welded reinforcing steel PC 52 with self-shielded wires, using a vibroacustic technique. To validate this method, the results obtained by vibroacoustic signal processing are compared with those determined by the tensile stresses of the same samples.

Characterization of Non-Metallic Inclusions in API Steel Grades Using Automated Energy Dispersive X-Ray

2018 ◽  
Vol 916 ◽  
pp. 217-220
Author(s):  
Masoud Al-Gahtani ◽  
Sunilkumar Pillai ◽  
Ahmad Al-Raddadi
Keyword(s):  
Inclusion Composition ◽  
X Ray ◽  
Steel Making ◽  
Metallic Inclusions ◽  
Hydrogen Induced Cracking ◽  
Steel Processing ◽  
Steel Grades ◽  
Formation And Evolution ◽  
Scanning Electron

Non-metallic inclusions in API steel grades deteriorate steels’ mechanical properties and their resistance to hydrogen induced cracking. The formation and evolution of inclusion during liquid steel processing was investigated by analyzing samples taken from different stages of the steel making process in API X52 and X60 steel grades. Scanning electron microscope (SEM) with automated feature EDX analyzer (INCAF 250) was used to identify each inclusion in terms of its size, area and composition. It was found that non-metallic inclusions in API X52 and X60 grades from steelmaking and casting samples were mainly Al2O3, Ca–Al and Ca-Mg-Al. In this work changes in inclusion composition, size and area fraction from ladle processing to casting were mapped and this information was used to improve steel cleanness and product quality.

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

MX01

Alloy Digest ◽  
2014 ◽  
Vol 63 (9) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Properties ◽  
Steel Grade ◽  
The Cost

Abstract MX01 is a steel grade developed to achieve useful properties to minimize the cost of forging dies. This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness. It also includes information on forming. Filing Code: SA-708. Producer or source: Industeel USA, LLC.

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 EVALUATION OF THE EFFICIENCY OF USING SK30 WIRE IN STEEL PROCESSING AT THE LADLE FURNACE PLANT

2021 ◽  
pp. 46-49
Author(s):  
D. V. Rutskiy ◽  
A. Y. Agarkov ◽  
N. A. Zyuban ◽  
M. S. Nikitin ◽  
R. M. Vojtenko ◽  
...  
Keyword(s):  
Cast Billet ◽  
Vacuum Cleaner ◽  
Metallic Inclusions ◽  
Calcium Aluminates ◽  
Continuously Cast Billet ◽  
Steel Processing ◽  
Negative Effect ◽  
Continuously Cast ◽  
Filling Path ◽  
Furnace Plant

The paper presents studies showing the effectiveness of the use of wire with SiCa filler in the out-of-furnace processing of steels. The efficiency of use was evaluated by calculating the contamination with non-metallic inclusions, as well as by determining the phase composition of non-metallic inclusions at the stages of out-of-furnace processing and casting. (installation bucket furnace→vacuum cleaner→continuous casting). The study found that the adjustment of the content of aluminum before casting leads to the formation of refractory inclusions of corundum - (AlO), spinels - (AlO·MgO), which are deposited on the walls of the steel filling path and worsen the spillability of steel. The use of SK30prov with SiCa filler at the final stages of extra-furnace processing (after the introduction of aluminum), leads to the modification of refractory inclusions in low-melting calcium aluminates of the type (CaO·AlO). The presence of low-melting inclusions is more preferable, since this type of inclusions is not deposited on the walls of the filling cup and does not have a negative effect on the contamination of the continuously cast billet and products obtained from them with inclusions.

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