SU662020A3 - Method of protecting bottom tuyeres - Google Patents
Method of protecting bottom tuyeresInfo
- Publication number
- SU662020A3 SU662020A3 SU772459655A SU2459655A SU662020A3 SU 662020 A3 SU662020 A3 SU 662020A3 SU 772459655 A SU772459655 A SU 772459655A SU 2459655 A SU2459655 A SU 2459655A SU 662020 A3 SU662020 A3 SU 662020A3
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- protective fluid
- tuyeres
- flow
- per minute
- phase
- Prior art date
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/48—Bottoms or tuyéres of converters
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Description
-1-one
Изобретение относитс к металлургии и может быть использовано при продувке ванны кислородом через дно конвертера.The invention relates to metallurgy and can be used when blowing a bath with oxygen through the bottom of a converter.
Известны способы защиты донных фурм дл продувКй конверторной ваннь кислородом , окруженным защитной жидкостью {1 .There are known methods for protecting bottom tuyeres for blowing through a converter bath with oxygen surrounded by a protective liquid {1.
Наиболее близким по технической. сущности и достигаемому результату к описывае мому изобретению вл етс способ защиты донных фурм дл продувки конверторной ванны кислородом, окруженным защитной жидкостью, содержацхей углеводороды, BKJlroчающи .й регулировку расхода защитной жидкости 2.The closest technical. The essence and the achieved result to the described invention is a method of protection of bottom tuyeres for blowing the converter bath with oxygen surrounded by a protective fluid containing hydrocarbons, BKJrochuyuyuyu regulating the flow of protective fluid 2.
Недостатком известного способу вл етс больщой расход защитной жидкости и низка стойкость фурм.A disadvantage of the known method is the large consumption of protective fluid and the low resistance of the tuyeres.
Целью изобретени вл етс увеличение стойкости фурм.The aim of the invention is to increase the resistance of the tuyeres.
Указанна цель достигаетс тем, что -регулировку расхода защитной жидкости осуществл ют в три фазы, причем от начала продувки до содержани углерода в ванне 0,3-0,7°/о расход защитной жидкости поддерживают равным 0,4-0,6 Dn, до 90-95% общего времени продувки равным Dn и до конца продувки 1,5-2,0 Dn, где Dn- нормальный расход защитной жидкости, равный 0,08-0,15 литров в минуту на сантиметр средней длины окружности кольцевого прохода в фурме дл защитной жидкости.This goal is achieved by the fact that the adjustment of the flow rate of the protective fluid is carried out in three phases, and from the beginning of the purge to the carbon content in the bath of 0.3-0.7 ° / o the flow rate of the protective fluid is maintained at 0.4-0.6 Dn, up to 90-95% of the total blowing time equal to Dn and until the end of blowing 1.5-2.0 Dn, where Dn is the normal flow of protective fluid, equal to 0.08-0.15 liters per minute per centimeter of average circumference of the annular passage in tuyere for protective fluid.
Пример осуществлени способа.An example of the method.
Продувка велась в конверторе - 60 тонн, днище которого имело 7 двойных фурм, кажда из которых имеет трубку 28 мм/34 мм дл кислорода и трубку 36 мм/42 мм дл защитной жидкости. В данном случае защитной жидкостью вл етс мазут.The purge was carried out in the converter — 60 tons, the bottom of which had 7 double tuyeres, each of which had a tube of 28 mm / 34 mm for oxygen and a tube of 36 mm / 42 mm for a protective fluid. In this case, the protective liquid is fuel oil.
При фурмах этого размера нормальный расход мазута составит около 1,43 литров в минуту и 1,5 литров в минуту на фурму.With tuyeres of this size, the normal consumption of fuel oil will be about 1.43 liters per minute and 1.5 liters per minute per tuyere.
1-а фаза; с начала до объема продутоto кислорода в 2200 Нм, то есть 65% общего дуть . В этот момент содержание уг5 лерода э ванне не дозируетс , но оно составл ет около 0,500%. В течение всего этого первого периода расход мазута регулируетс 0,5 Dn 0,5x1,5 0,75 литров в минуту на фурму, то есть 5,25 литров в минуту на 7 1st phase; from the beginning to the volume of oxygen production in 2200 Nm, that is 65% of the total blowing. At this point, the carbon dioxide content is not dosed, but it is about 0.500%. Throughout this first period, the consumption of fuel oil is regulated by 0.5 Dn 0.5 × 1.5 0.75 liters per minute per lance, i.e. 5.25 liters per minute at 7
0 фурм. В насто щем примере перва фаза длитс 8,5 минут. 0 lances In the present example, the first phase lasts 8.5 minutes.
Claims (2)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772459655A SU662020A3 (en) | 1977-03-16 | 1977-03-16 | Method of protecting bottom tuyeres |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
SU772459655A SU662020A3 (en) | 1977-03-16 | 1977-03-16 | Method of protecting bottom tuyeres |
Publications (1)
Publication Number | Publication Date |
---|---|
SU662020A3 true SU662020A3 (en) | 1979-05-15 |
Family
ID=20698289
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
SU772459655A SU662020A3 (en) | 1977-03-16 | 1977-03-16 | Method of protecting bottom tuyeres |
Country Status (1)
Country | Link |
---|---|
SU (1) | SU662020A3 (en) |
-
1977
- 1977-03-16 SU SU772459655A patent/SU662020A3/en active
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