System for measuring lance position in steel-melting baths

Metallurgist ◽  
1976 ◽  
Vol 20 (5) ◽  
pp. 325-327
Author(s):  
�. �. Merker ◽  
A. T. Stepanov ◽  
V. N. Nikolaev ◽  
V. A. Kulichenko
Keyword(s):  
Steel Melting ◽  
Lance Position

scholarly journals The investigation on the middle period dephosphorization in 70t converter

2020 ◽  
Vol 39 (1) ◽  
pp. 567-575
Author(s):  
Deng Nanyang ◽  
Wang Haijun ◽  
Ling Haitao ◽  
Wang Jianjun
Keyword(s):  
Theoretical Calculation ◽  
Experimental Test ◽  
Limiting Factor ◽  
Molten Bath ◽  
Large Margin ◽  
Test Conditions ◽  
Middle Period ◽  
Slag Conditions ◽  
Dephosphorization Rate ◽  
Lance Position

AbstractAn experimental test is carried out on the 70t converter in Masteel to study the law of middle period dephosphorization in the smelting period. It is found that the dephosphorization rate is slow in the early and middle period of smelting and the content of the final P in steel cannot reach the standard due to the low oxidation of slag. The content of the final P in steel can be controlled within 0.02% by adding ore to the molten bath in the middle period and raising the lance position. The experimental test shows that the dephosphorization can still be achieved by a large margin if appropriate slag conditions are maintained in the middle period when the C and O reactions are strong. By theoretical calculation, it is concluded that the slag content should be controlled between 15 and 23%, and the basicity of slag should be between 2.5 and 2.8 in the middle period of production. Through the observation of experimental slag by SEM, it is found that the limiting factor of dephosphorization in the middle period under the test conditions is that the dephosphorization speed is too slow due to the low oxidation, rather than the solidification of phosphorus.

Assimilation of High-Strength Austenitic Corrosion Resistant Nitrogen-Containing Steel Melting Technology Using Large-Capacity Equipment

Metallurgist ◽  
2015 ◽  
Vol 58 (9-10) ◽  
pp. 800-805 ◽  
Author(s):  
V. G. Milyuts ◽  
V. V. Tsukanov ◽  
G. Yu. Kalinin ◽  
A. A. Kazakov ◽  
S. Yu. Afanas’ev
Keyword(s):  
High Strength ◽  
Steel Melting ◽  
Large Capacity ◽  
Corrosion Resistant ◽  
Melting Technology

New developments in the automation of steel melting

Metallurgist ◽  
1968 ◽  
Vol 12 (6) ◽  
pp. 293-297
Author(s):  
V. M. Vinogradov ◽  
O. B. Kleshko ◽  
B. I. Krasnov ◽  
V. E. Pirozhnikov
Keyword(s):  
Steel Melting ◽  
New Developments

Ensuring the eco safety of mixing departments steel melting shops

2021 ◽  
pp. 45-51
Author(s):  
V. Kravets ◽  
◽  
S. Padalko ◽  
V. Gorovenko ◽  
◽  
...  
Keyword(s):  
Cast Iron ◽  
Nitrogen Supply ◽  
Dust Collector ◽  
Steel Melting ◽  
Compartment System ◽  
Gas Cleaning ◽  
Aspiration System ◽  
Purification Efficiency ◽  
Low Emission ◽  
New Construction

Introduction. Mixer branches of metallurgical enterprises are an intermediate link between blast furnace and steelmaking workshops. They are equipped with mixers – footer containers for storing cast iron melt. In Ukraine, mixers with a capacity of 1300 or 2500 tons are used. Technological operations are accompanied by emissions of finely dispersed brown smoke and large-dispersed graphite dust into the atmosphere. Problem. Mixer compartments of Ukrainian factories are equipped with aspiration systems that dimity emissions from cast iron pouring and draining units with the help of fume tubes, then emissions pass the dust collector and discharge into the atmosphere through a chimney. The main impact of mixer compartments on the environment is: disorganized emission through an aerodynamic dust lamp, which is not allotted by the aspiration system; organized emission through a smoke pipe of dust not caught by a dust collector; solid waste from gas cleaning and dust hoppers settling on the floor and structures of the mixer compartment from the disorganized ejection that did not come out through the lantern. The main problems are insufficient aspiration (disorganized emission) and low emission purification efficiency (emission through the chimney). A separate problem is the disposal of caught dust. The degree of aspiration in the factories of Ukraine is about 0.7 for the filling unit in the mixer and 0.8 for the drain unit from the mixer at the power of the aspiration system 150-250 thousand tons. This does not meet modern requirements. Results. Cyclones are used as a dust collector in most factories, which completely capture graphite, but are not effective enough for brown smoke. Therefore, it is proposed to use sleeve filters or electro filters. It is also possible to introduce the suppression of brown smoke with nitrogen. The use of nitrogen is possible in accordance with cyclones (for existing systems) or compatible with filters (during reconstruction or new construction). The use of suppression of brown smoke with nitrogen allows to solve the problem of disposal of caught dust, because nitrogen supply leads to enrichment of dust with graphite. The content of graphite increases from 15% to more than 30%, which converts dust from care to commodity product. Keywords: mixer, cast iron pouring, cast iron drainage, dust suppression by nitrogen, aspirational mixer compartment system.

Influence of Secondary Refining on the Non-Metallic Inclusions Rating during 26KhMFBA Steel Melting

2021 ◽  
Vol 51 (7) ◽  
pp. 475-479
Author(s):  
D. V. Rutskii ◽  
N. A. Zyuban ◽  
M. V. Kirilichev ◽  
M. S. Nikitin
Keyword(s):  
Steel Melting ◽  
Secondary Refining ◽  
Metallic Inclusions

Quality improvement of the steel melting technology in an electric arc furnace

2021 ◽  
Vol 11 (7) ◽  
pp. 48-54
Author(s):  
Nodir Turakhodjaev ◽  
Nozimjon Kholmirzaev ◽  
Shokhista Saidkhodjaeva ◽  
Bakhtiyor Kasimov
Keyword(s):  
Quality Improvement ◽  
Electric Arc Furnace ◽  
Electric Arc ◽  
Arc Furnace ◽  
Steel Melting ◽  
Melting Technology
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