STUDY OF COMPOSITION AND STRUCTURE OF NLMK BF No. 6 HEARTH SCULL. Report 2-Reference-Cited by-同舟云学术

STUDY OF COMPOSITION AND STRUCTURE OF NLMK BF No. 6 HEARTH SCULL. Report 2

Published:2021-12-28 Issue:12 Volume:77 Page:1253-1262
ISSN:2619-0753
Container-title:Ferrous Metallurgy. Bulletin of Scientific , Technical and Economic Information
language:
Short-container-title:Černaâ metallurgiâ. Bûlletenʹ naučno-tehničeskoj informacii

Author:

KURUNOV I. F.¹,BLIZNYUKOV A. S.²,LOGVINOV N. V.¹,TIKHONOV D. N.³,SADRADINOV M. R.²,MAKAVETSKAS А. R.⁴,FISHCHENKO YU. YU.⁴

Affiliation:

1. PJSC NLMK

2. OJSC TD “Carbon-Shungit Trade”

3. DDG Technologies, LLC

4. FGAOU VO “National Research Technical University “MISiS”

Abstract

Resistance of hearth walls lining and their joint with hearth plug considerably governs a blast furnace (BF) campaign duration. Development of hearth design of modern BFs provides a high effective heat sink by copper cooling plates and application for the lining carbonaceous blocks having high heat conductivity, which causes stable scull formation. Study of the composition and the structure of the scull is an important and actual task to provide the highest technical and economical indices of blast furnace production, increasing of the furnaces campaign duration. It was shown that the scull in the hearth zone has a laminated structure. It was established that content of titanium compounds (oxide, carbides and nitrides) in the scull is low. Zinc buildups were not found on the carbonaceous refractories of the hearth walls lower the tap hole. Considerable content of zinc compounds was revealed in the scull of brickwork of the hearth top, in the area of tap holes and hole channels, on the hearth refractories. It was found that basic components of the scull were represented by carbon in the form of graphite, metal (mainly in the form of α-Fe) and slag, amount of which was nincreasing from the lower part of the hearth to the upper one while the content of metal and graphite in it was decreasing.

Publisher

South Ural State University

Subject

General Medicine

Reference3 articles.

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2. Bliznyukov A.S., Feshchenko S.A., Kurunov I.F., Korovushkin V.V. Investigation into the lining of the Hearth in the Blast Furnace (Report 1). Chernaya metallurgiya. Byulleten’ nauchno-tekhnicheskoi i ekonomicheskoi informatsii = Ferrous met-allurgy. Bulletin of scientific, technical and economic information, 2010, no. 9, pp. 31–36. (In Russ.).

3. Bliznyukov A.S., Sadradinov M.R., Makavetskas A.R., Fishchenko Yu.Yu. Study of Blast Furnace Hearth Lining (Report 2). Chernaya metallurgiya. Byulleten’ nauchno-tekhnicheskoi i ekonomicheskoi informatsii = Ferrous metallurgy. Bulletin of scientific, technical and economic information, 2018, no. 2, pp. 37–43. (In Russ.).