CN104611492A - Method for rapidly processing bend loss tuyere small sleeve of blast furnace - Google Patents
Method for rapidly processing bend loss tuyere small sleeve of blast furnace Download PDFInfo
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- CN104611492A CN104611492A CN201510049480.5A CN201510049480A CN104611492A CN 104611492 A CN104611492 A CN 104611492A CN 201510049480 A CN201510049480 A CN 201510049480A CN 104611492 A CN104611492 A CN 104611492A
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- small sleeve
- tuyere small
- water
- blast furnace
- tuyere
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/16—Tuyéres
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention discloses a method for rapidly processing a bend loss tuyere small sleeve of a blast furnace and belongs to the field of blast furnace iron making, wherein the bend loss tuyere small sleeve is processed by water closing and melting loss during the damping down process under a hot air pressure of 80-100 KPa. The method for rapidly processing bend loss tuyere small sleeve of a blast furnace can achieve the aims of immediately processing the bend loss tuyere small sleeve, reducing the time of changing tuyere small sleeve and relieving the difficulty of replacing the tuyere small sleeve, thereby shortening the damping down time, weakening the labor strength of the manual operation and reducing the yield loss.
Description
Technical field
The invention belongs to blast furnace ironmaking field, a kind of fast processing blast furnace song damages the method for tuyere small sleeve.
Background technology
Require in blast furnace production process to realize direct motion steady in a long-term, especially when high-coal ratio, low coke ratio are produced, balance pressure magnitude relation in stove, control certain edge Gas Flow and furnace heat load, if furnace wall slag crust is blocked up, then can there is the pernicious industrial accident that tuyere small sleeve song damages, need blast furnace damping down replacing immediately, avoid fault spread, prevent second accident.The bent concept of damaging of tuyere small sleeve, namely causes tuyere small sleeve to sink and the bent damage of generation because furnace wall slag crust big area comes off in process of production.
The basis for estimation that tuyere small sleeve song damages: 1. little song damages: observe in eye hole mirror, finds that tuyere small sleeve front end is sagging, without leaking out.2. serious bent damage: thermal load sharply rises, and furnace wall comes off and causes the tuyere small sleeve song damage below this region to run wind.3. the more serious bent tuyere small sleeve forward and back water pipe damaged will withstand tuyere big sleeve, causes water pipe to ftracture or fracture, needs damping down immediately to change.
At present following method is adopted to the process that tuyere small sleeve song damages:
1, damage without the song that leaks out, only need strengthen the spot check to this tuyere small sleeve, and contact coal powder injection and adjust coal rifle angle or stop-spraying;
2, carry out outside to the tuyere small sleeve that leaks out to fetch water cooling, to leak out situation to the long report of operation.
3, the confluent that Daqu damages tuyere small sleeve is added.
4, the push rod of lower link and tuyere small sleeve bottom on the fastening belly pipe in stokehold is contacted.
5, treated invalid when still leaking out serious, carry out subtracting, damping down process.
6, treated still having is leaked out, time fetching water and cool and change the bent tuyere small sleeve damaged after normal procedure damping down in visual range degree employing pressurized air or outside, the tuyere small sleeve distortion damaged due to song is serious, dismounting difficulty, cause the time lengthening changing tuyere small sleeve, thus affect furnace processor and recover difficulty.
Summary of the invention
The invention provides quick-detachment song when there is above-mentioned 6th kind of situation and damage the method for tuyere small sleeve, object reduces to change the bent time of damaging tuyere small sleeve, alleviate and change bent difficulty of damaging tuyere small sleeve, thus reduce the damping down time, reduce labor intensity and reduce furnace processor loss.
Technical scheme of the present invention: a kind of fast processing blast furnace song damages the method for tuyere small sleeve, namely damages tuyere small sleeve to song in damping down process and carries out pass aqueous fusion damage process under hot-blast pressure is 80 ~ 100KPa state.
Close aqueous fusion to damage treatment process and comprise after damping down operation starts, gradually reduce the tuyere small sleeve water yield, the water yield and thermal air pressure synchronization control, namely the tuyere small sleeve water yield reduces to 300L/ min, and hot blast rate reduces to 5000m
3/ min; When hot blast rate reduces to furnace roof normal pressure, tuyere small sleeve plumbing is switched to bypass; Fetched water cooling in tuyere small sleeve outside; When thermal air pressure reduces to 80kpa, tuyere small sleeve feedwater is closed; Water-break valve is closed when tuyere small sleeve drainage head emits coal gas.
Summed up by the production practice damaging low pressure melting loss to many blast furnace tuyere small sleeve songs.The present invention under low pressure can damage tuyere small sleeve to song and carry out melting loss in damping down process, thus minimizing is changed the time of bent damage tuyere small sleeve and reduced labor intensity, i.e. minimizing damping down time (shortening 2 hours) and furnace processor loss.
Embodiment
Embodiment: the people that stands is forbidden in three, the rifle that is ready to before damping down operation to fetch water (aim at this tuyere small sleeve to fix to, water shoot flange, another root is done for subsequent use) tuyere small sleeve front.
1, the tuyere small sleeve water yield is reduced to 300L/ min, hot blast rate reduces to 5000m
3the water yield 600 ~ 630L/ min when/min(normally produces);
2, when hot blast rate reduces to 3000 ~ 3500m3/min, tuyere small sleeve plumbing is switched to bypass state, (first driving No. 3 bypass water intaking valves, No. 6 bypass water-break valves, No. 1, rear pass water intaking valve, No. 2 water intaking valves, No. 4 water-break valves, No. 5 valve water-break valves).(illustrate: blast furnace 1,2, No. 3 water intaking valves, 4,5, No. 6 water-break valves are all the attached valves of blast furnace.）
3, with rifle of fetching water, fetched water cooling (each tuyere small sleeve 3 rifles in outside, tuyere small sleeve advance and retreat water pipe place, fix 2 in advance, one is for subsequent use) blast reduces to 80 ~ 100KPa and starts to cut off the water, close No. 3 valves and (cut off the water 10 minutes, 80 ~ 60KPa, cuts 5 minutes coal gas time).When tuyere small sleeve drainage head has coal gas to blow out, close No. 6 valves at once.
4, stop after damping down fetching water.
Precaution:
Tuyere small sleeve front forbid stand people;
To look over one's shoulder situation and drainage condition in tuyere small sleeve;
Prevent from tuyere small sleeve advance and retreat water metallic hose from burning to hurt sb.'s feelings;
Tuyere small sleeve is fetched water and flows in platform water-break groove;
Before windward is young cover, the water flowing of tuyere small sleeve intake-discharge pipe is cleaned;
In strict accordance with regulated procedure operation.
Claims (3)
1. fast processing blast furnace song damages a method for tuyere small sleeve, it is characterized in that under hot-blast pressure is 80 ~ 100KPa state, damaging tuyere small sleeve to song in damping down process carries out pass aqueous fusion damage process.
2. a kind of fast processing blast furnace song according to claim 1 damages the method for tuyere small sleeve, it is characterized in that described pass aqueous fusion damages treatment process and is: after damping down operation starts, gradually reduce the tuyere small sleeve water yield, the water yield and thermal air pressure synchronization control, namely hot blast rate reduces to 5000m
3/ min, the tuyere small sleeve water yield reduces to 300L/ min; When hot blast rate reduces to furnace roof normal pressure, tuyere small sleeve plumbing valve transfer is to bypath valve; Fetched water cooling in tuyere small sleeve outside; When thermal air pressure reduces to 80kpa, tuyere small sleeve feedwater is closed; Water-break valve is closed when tuyere small sleeve drainage head emits coal gas.
3. a kind of fast processing blast furnace song according to claim 2 damages the method for tuyere small sleeve, it is characterized in that described tuyere small sleeve plumbing valve transfer order first drives No. 3 bypass water intaking valves, No. 6 bypass water-break valves, No. 1, rear pass water intaking valve, No. 2 water intaking valves, No. 4 water-break valves, No. 5 valve water-break valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049480.5A CN104611492B (en) | 2015-02-01 | 2015-02-01 | A kind of quick process blast furnace song damages the method for tuyere small sleeve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510049480.5A CN104611492B (en) | 2015-02-01 | 2015-02-01 | A kind of quick process blast furnace song damages the method for tuyere small sleeve |
Publications (2)
| Publication Number | Publication Date |
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| CN104611492A true CN104611492A (en) | 2015-05-13 |
| CN104611492B CN104611492B (en) | 2016-06-22 |
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| CN201510049480.5A Active CN104611492B (en) | 2015-02-01 | 2015-02-01 | A kind of quick process blast furnace song damages the method for tuyere small sleeve |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111304389A (en) * | 2020-04-10 | 2020-06-19 | 山东钢铁集团日照有限公司 | Method for reducing bending loss of blast furnace tuyere |
| CN111676335A (en) * | 2020-06-17 | 2020-09-18 | 安徽长江钢铁股份有限公司 | Metal hose connection modified from hard pipe of tuyere small sleeve cooling water pipe |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0649518A (en) * | 1992-07-31 | 1994-02-22 | Sumitomo Metal Ind Ltd | Closing method for blast furnace tuyere |
| CN203569129U (en) * | 2013-10-29 | 2014-04-30 | 宝山钢铁股份有限公司 | Blast furnace tuyere simulation test device |
-
2015
- 2015-02-01 CN CN201510049480.5A patent/CN104611492B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0649518A (en) * | 1992-07-31 | 1994-02-22 | Sumitomo Metal Ind Ltd | Closing method for blast furnace tuyere |
| CN203569129U (en) * | 2013-10-29 | 2014-04-30 | 宝山钢铁股份有限公司 | Blast furnace tuyere simulation test device |
Non-Patent Citations (1)
| Title |
|---|
| 马洪斌等: "高炉风口损坏的判断与治理", 《第十届全国大高炉炼铁学术年会论文集》, 31 December 2009 (2009-12-31) * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111304389A (en) * | 2020-04-10 | 2020-06-19 | 山东钢铁集团日照有限公司 | Method for reducing bending loss of blast furnace tuyere |
| CN111676335A (en) * | 2020-06-17 | 2020-09-18 | 安徽长江钢铁股份有限公司 | Metal hose connection modified from hard pipe of tuyere small sleeve cooling water pipe |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104611492B (en) | 2016-06-22 |
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