CN104611492B - A kind of quick process blast furnace song damages the method for tuyere small sleeve - Google Patents
A kind of quick process blast furnace song damages the method for tuyere small sleeve Download PDFInfo
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- CN104611492B CN104611492B CN201510049480.5A CN201510049480A CN104611492B CN 104611492 B CN104611492 B CN 104611492B CN 201510049480 A CN201510049480 A CN 201510049480A CN 104611492 B CN104611492 B CN 104611492B
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- small sleeve
- tuyere small
- water
- song
- damage
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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
A kind of quick process blast furnace song damage tuyere small sleeve method, belong to blast furnace ironmaking field, it is characterized in that in damping down process hot-blast pressure be under 80～100KPa state to song damage tuyere small sleeve carry out close aqueous fusion damage process。The present invention can reach quickly to process song and damage the purpose of tuyere small sleeve, reduces the time changing tuyere small sleeve and alleviates the difficulty changing tuyere small sleeve, thus shortening the damping down time, alleviating manual work labor intensity and reducing production loss。
Description
Technical field
The invention belongs to blast furnace ironmaking field, a kind of quick process blast furnace song damages the method for tuyere small sleeve。
Background technology
Blast furnace production process requires realize direct motion steady in a long-term, when producing particularly in high-coal ratio, low coke ratio, balance the intrinsic pressure magnitude relation of stove, control certain edge Gas Flow and furnace heat load, if furnace wall slag crust is blocked up, then can there is the pernicious production accident that tuyere small sleeve song damages, it is necessary to blast furnace damping down immediately is changed, avoid fault spread, it is prevented that second accident。The concept that tuyere small sleeve song damages, namely causes tuyere small sleeve sinking that bent damage occurs owing to furnace wall slag crust large area comes off in process of production。
The basis for estimation that tuyere small sleeve song damages: 1. little bent damage: observe in eye hole mirror, it has been found that tuyere small sleeve front end is sagging, without leaking out。2. serious bent damage: thermic load steeply rises, and furnace wall comes off and causes the tuyere small sleeve song below this region to damage and run wind。3. the more serious bent tuyere small sleeve forward and back water pipe damaged will withstand tuyere big sleeve, causes water pipe cracking or fracture, it is necessary to damping down is changed immediately。
The process at present tuyere small sleeve song damaged adopts following method:
1, without the bent damage leaked out, only need to strengthening the spot check to this tuyere small sleeve, coal rifle angle or stop-spraying are adjusted in taken in conjunction coal powder injection；
2, the tuyere small sleeve that leaks out carries out outside fetch water cooling, report, to operation length, situation of leaking out。
3, add Daqu (massive raw stater for alcholic liquor) and damage the confluent of tuyere small sleeve。
4, the push rod of lower link and tuyere small sleeve bottom on contact stokehold fastening belly pipe。
5, treated invalid when still leaking out serious, carry out subtracting, damping down processes。
6, treated still having is leaked out, fetch water when cooling down and change the tuyere small sleeve of song damage after normal procedure damping down in visual range degree employing compression air or outside, the tuyere small sleeve deformation damaged due to song is serious, dismounting difficulty, cause the time lengthening changing tuyere small sleeve, thus affecting furnace processor and recovering difficulty。
Summary of the invention
The present invention provides and occurs quickly to dismantle the bent method damaging tuyere small sleeve during above-mentioned 6th kind of situation, purpose is the time reducing and changing song damage tuyere small sleeve, alleviate the difficulty changing song damage tuyere small sleeve, thus reducing the damping down time, reducing labor intensity and reducing furnace processor loss。
Technical scheme: a kind of quick process blast furnace song damage tuyere small sleeve method, namely in damping down process hot-blast pressure be under 80～100KPa state to song damage tuyere small sleeve carry out close aqueous fusion damage process。
Closing aqueous fusion damage to process technique and include after damping down operation starts, gradually reducing 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 5000m3/ min；When hot blast rate reduces to furnace roof normal pressure, tuyere small sleeve plumbing is switched to bypass；To cooling of fetching water outside tuyere small sleeve；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。
Sum up by many blast furnace tuyere small sleeve songs being damaged the production practices of low pressure melting loss。Song under low pressure can be damaged tuyere small sleeve in damping down process and carry out melting loss by the present invention, thus reducing the time changing song damage tuyere small sleeve and reducing labor intensity, namely reduces damping down time (shortening 2 hours) and furnace processor loss。
Detailed description of the invention
Embodiment: three, the rifle that is ready to before damping down operation to fetch water (is directed at this tuyere small sleeve to fix to, drain pipe flange, another root is made standby) tuyere small sleeve front and forbids people from station。
1, the tuyere small sleeve water yield being reduced to 300L/min, hot blast rate reduces to 5000m3The 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, rear pass No. 1 water intaking valve, No. 2 water intaking valves, No. 4 water-break valves, No. 5 valve water-break valves)。(illustrate: 1,2, No. 3 water intaking valves of blast furnace, 4,5, No. 6 water-break valves are all the attached valves of blast furnace。)
3, with rifle of fetching water, cooling of fetching water outside tuyere small sleeve advance and retreat water pipe place (3 rifles of each tuyere small sleeve, fix 2 in advance, and one standby) blast is reduced to 80～100KPa and started to cut off the water, close No. 3 valves (cut off the water 10 minutes, 80～60KPa, cut the coal gas time 5 minutes)。When tuyere small sleeve drainage head has coal gas to blow out, immediately close off No. 6 valves。
4, stop after damping down fetching water。
Points for attention:
Tuyere small sleeve front forbid people from station；
Look over one's shoulder situation and drainage condition in tuyere small sleeve；
Prevent from tuyere small sleeve advance and retreat water metal hose from burning to hurt sb.'s feelings；
Tuyere small sleeve is fetched water stream in platform water-break groove；
Before the little set of uptake, tuyere small sleeve intake-discharge pipe water flowing is cleaned；
In strict accordance with regulated procedure operation。
Claims (2)
1. quick process blast furnace song damage tuyere small sleeve a method, in damping down process hot-blast pressure be under 80～100KPa state to song damage tuyere small sleeve carry out close aqueous fusion damage process；It is characterized in that described pass aqueous fusion damage processes technique and is: after damping down operation starts, gradually reducing the tuyere small sleeve water yield, the water yield and thermal air pressure synchronization control, namely hot blast rate reduces to 5000m3/ 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；To cooling of fetching water outside tuyere small sleeve；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。
2. the method that a kind of quick process blast furnace song according to claim 1 damages tuyere small sleeve, it is characterized in that described tuyere small sleeve plumbing valve transfer order is first to drive No. 3 bypass water intaking valves, No. 6 bypass water-break valves, rear pass No. 1 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 |
|---|---|
| CN104611492A CN104611492A (en) | 2015-05-13 |
| CN104611492B true 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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Families Citing this family (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 |
|---|
| 高炉风口损坏的判断与治理;马洪斌等;《第十届全国大高炉炼铁学术年会论文集》;20091231 * |
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| CN104611492A (en) | 2015-05-13 |
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