Impact of using metallized iron ore pellets to increase the efficiency of electric arc furnace-Reference-Cited by-同舟云学术

Impact of using metallized iron ore pellets to increase the efficiency of electric arc furnace

Published:2015-09-30 Issue:3 Volume:15 Page:35-40
ISSN:1992-5980
Container-title:Вестник Донского государственного технического университета
language:
Short-container-title:Vestnik Donskogo gosudarstvennogo tehničeskogo universiteta

Author:

Krakht Ludmila N.¹,Merker Edward E.¹,Kem Alexander Y.²,Stepanov Victor A.¹

Affiliation:

1. Stary Oskol Technological Institute after A.A.Ugarov (NITU "MISiS" branch)

2. Don State Technical University

Abstract

The work objective is to determine the effect of the metallurgical properties of iron-rich pellets and of the method of their submission to the arc furnace bath on the intensification of the heating and melting of the iron metallized pellets (IMP) in the slag-metal melt unit. A method of supplying pellets through the electrode axial passages that allows, simultaneously with the pellets, feeding supplementary bulk materials (lime, coke fines, scale, etc.) to the IMP melting zone through the holes in the electrodes is offered. Thus, the conditions of the full immersion of the arcs into the formed foaming slag are provided. The effect of iron oxides of various phase and chemical compositions on the plastic properties of pellets is investigated. It is found that the microstructure invariance of fluxed pellets including the bonded phase composition is determined by the level of fluxing and the difference of the iron valent states. Improvement in the efficiency of IMP melting is achieved by feeding pellets with improved physicochemical and technological properties, as well as supplementary materials, into the slag-metal bath through the axial passages of the electrodes.

Publisher

FSFEI HE Don State Technical University

Reference7 articles.

1. Merker, E.E., Chermenev, E.A. Elektroplavka metallizovannykh okatyshey v dugovoy pechi. [Electrosmelting of metallized pellets in arc furnace.] Staryy Oskol: Tonkie naukoemkie tekhnologii, 2015, 320 p. (in Russian).

2. Merker, E.E. Energosberegayushchie usloviya plavleniya metallizovannykh okatyshey v vanne dugovoy pechi. [Energy-saving conditions for melting metallized pellets in the arc furnace bath.] Chernaya metallurgiya, 2008, no. 1, pp. 35– 39 (in Russian).

3. Timofeyeva, A.S., et al. Rezul'taty issledovaniy plasticheskikh svoystv okatyshey pri vosstanovlenii. [Results of the research of pellet plastic properties under reduction.] Stal', 2008, no. 2, pp. 2–3 (in Russian).

4. Krakht, L.N., et al. Mikrostruktura obozhzhennykh i metallizovannykh okatyshey. [Microstructure of the fired and metallized pellets.] Izvestia. Ferrous Metallurgy, 2007, no. 10, pp. 7–8 (in Russian).

5. Merker, E.E., Stepanov, V.A. Povyshenie effektivnosti elektroplavki stali putem podachi metallizovannogo syr'ya v zonu vysokikh temperatur cherez kanaly v elektrodakh dugovoy pechi. [Improving the efficiency of steel electric smelting by supplying metallized raw material in the high temperature zone through channels in the arc furnace electrodes.] Chernaya metallurgiya, 2014, no. 1, pp. 41–49 (in Russian).

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