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2 325 444

(13)

(51)

IPC

C21B7/16(2006-01-01)

(21) (22)

Application

2006112186/02, 2006-04-12

(24)

Start date

2006-04-12

(22)

Actual filing date

2006-04-12

(45)

Published

2008-05-27

(72)

Inventor

Saprykin Nikolaj IvanovichKrikunov Nikolaj IvanovichKostin Aleksandr AlekseevichKuznetsov Aleksandr EfimovichLjapin Sergej SemenovichDolgov Vladimir IvanovichEmel'Janov Vjacheslav LeonidovichLysenko Sergej AleksandrovichTitljanov Aleksandr EvgrafovichRadjuk Aleksandr Germanovich

(73)

Holder

Otkrytoe Aktsionernoe Obshchestvo Metallurgicheskij Kombinat"

METHOD OF PREPARATION OF BLAST FURNACE AIR TUYERE FOR OPERATION Russian patent published in 2008 - IPC C21B7/16

Abstract RU 2325444 C2

FIELD: metallurgy; equipment for heat treatment.

SUBSTANCE: said utility invention relates to the field of metallurgy and may be used during manufacture of blast furnace air tuyeres. The method involves shot blasting of the tuyere nozzle, its external cup, and a weld connecting them. An aluminium-containing gas-thermal coating is applied on the treated surface and annealing is carried out. Before shot blasting of the tuyere, the protruding part of the weld between the tuyere nozzle and the external cup is ground off to a remaining depth of no more than 1.0 mm. The side surface of the weld is chamfered at the side of the tuyere nozzle and the external cup. The use of the invention increases the tuyere resistance.

EFFECT: increased resistance of furnace tuyere.

1 tbl, 1 ex

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RU 2 325 444 C2

Authors

Saprykin Nikolaj Ivanovich

Krikunov Nikolaj Ivanovich

Kostin Aleksandr Alekseevich

Kuznetsov Aleksandr Efimovich

Ljapin Sergej Semenovich

Dolgov Vladimir Ivanovich

Emel'Janov Vjacheslav Leonidovich

Lysenko Sergej Aleksandrovich

Titljanov Aleksandr Evgrafovich

Radjuk Aleksandr Germanovich

Dates

2008-05-27—Published

2006-04-12—Filed