CN103757167A - Iron notch pretreatment method used during blowing in of blast furnace - Google Patents
Iron notch pretreatment method used during blowing in of blast furnace Download PDFInfo
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- CN103757167A CN103757167A CN201410016257.6A CN201410016257A CN103757167A CN 103757167 A CN103757167 A CN 103757167A CN 201410016257 A CN201410016257 A CN 201410016257A CN 103757167 A CN103757167 A CN 103757167A
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- iron mouth
- oxygen
- iron notch
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Abstract
The invention discloses an iron notch pretreatment method used during blowing in of a blast furnace. The iron notch pretreatment method comprises the following steps: preboring an iron notch, flatly putting an oxygen pipe while enabling the oxygen pipe to directly face the iron notch, feeding oxygen, enabling the oxygen pipe to burn inwards and melt cold iron slag in an iron notch channel, when the inward movement distance of the oxygen pipe is approximate to the normal thickness of a furnace wall, upwards bending the oxygen pipe, meanwhile swinging the oxygen pipe, and enabling the oxygen pipe to spirally advance so as to burn upwards and melt cold iron slag in the furnace; meanwhile, feeding oxygen, enabling the oxygen pipe to burn from air ports at the two sides of the iron notch to the direction of the iron notch so as to melt cold iron slag in the iron notch channel and an air port channel, after hot iron slag outflows, continuing feeding oxygen so as to heat iron slag for draining, and after the iron notch channel and the air port channel is burned through, plugging and thus completing iron notch pretreatment. According to the iron notch pretreatment method, the iron notch channel and the air port channel are quickly and effectively communicated with each other by doing various preparatory work well such as butt welding and lengthening the oxygen pipe in advance and swinging the oxygen pipe during burning the iron notch, the rapid blowing in and the designed capacity achievement are realized, and good economic benefits are achieved.
Description
Technical field
The invention belongs to the technical field of blast furnace flushing and casting, more particularly, relate to a kind of blast furnace iron mouth pretreatment process during blow-on again.
Background technology
When banking or while there is after hearth freeze-up blow-on again, because temperature in stove is low, slag iron mobility extreme difference, cold slag iron is often difficult to discharge out of the furnace in time, is unfavorable for the recovery of conditions of blast furnace.Therefore, the iron mouth pre-treatment work before blow-on is extremely important, need fully carry out every preparation work, burns rapidly the passage between Tong Tiekou and air port and discharges rapidly cold slag iron, thinks that the fast quick-recovery of blast furnace creates favorable conditions.
Traditional burning iron mouth method is to adopt oxygen hose to keep flat even downward-slopingly always, causes air port, iron mouth to be promptly effectively communicated with, and exist iron mouth passage narrow, frequently change the drawbacks such as oxygen hose expends time in.
In sum, needing a kind of better iron mouth pretreatment process badly creates favorable conditions for the fast quick-recovery of blast furnace.
Summary of the invention
For the existing deficiency of existing burning iron mouth method, the object of the invention is to one or more in overcoming the above problems.
The object of the present invention is to provide a kind of iron mouth pretreatment process of blow-on fast.
To achieve these goals, iron mouth pretreatment process while the invention provides a kind of blast furnace opening, described pretreatment process comprises the following steps: preboring iron mouth, oxygen hose is kept flat and just to iron mouth, logical oxygen burns oxygen hose and the interior cold slag iron of smelting iron mouth passage inwards, until oxygen hose miles of relative movement approaches normal furnace wall thickness inwards time, oxygen hose is bent upwards, swing oxygen hose simultaneously and make oxygen hose spiral advance upwards to burn and smelting furnace in cold slag iron; Simultaneously, logical oxygen makes oxygen hose burn with cold slag iron in the passage of smelting iron mouth-air port to iron mouth direction from the air port of Tie Kou both sides, after warm sludge flowing molten iron goes out, continues logical oxygen heating slag iron and carries out drainage, after passage burning in iron mouth-air port is logical, blocks up and complete the pre-treatment of iron mouth.
An embodiment of the iron mouth pretreatment process during according to blast furnace opening of the present invention, described pretreatment process also comprises the step of making in advance interim Sha Kou, iron mouth mud cover, main iron hook, an iron runner and dry slag runner.
An embodiment of the iron mouth pretreatment process during according to blast furnace opening of the present invention, described pretreatment process also comprises that butt welding oxygen hose is to increase the step of oxygen hose length in advance.
An embodiment of the iron mouth pretreatment process during according to blast furnace opening of the present invention, described pretreatment process also comprises adjusts the step that oxygen pressure is 0.50～0.55MPa in advance.
An embodiment of the iron mouth pretreatment process during according to blast furnace opening of the present invention, the iron mouth degree of depth of described preboring is 100～200mm.
An embodiment of the iron mouth pretreatment process during according to blast furnace opening of the present invention, the diameter of described iron mouth-air port passage is 150～200mm.
The present invention lengthens every preparation works such as oxygen hose as butt welding by well in advance, and swing oxygen hose when burning iron mouth, and iron mouth-air port passage is effectively communicated with rapidly, not only efficiency is high, and realized blow-on fast, reach product, obtained good economic benefit.
Embodiment
Iron mouth pretreatment process during hereinafter, by detailed description blast furnace opening of the present invention.
Iron mouth pretreatment process during blast furnace opening comprises the following steps according to an exemplary embodiment of the present invention:
First, preboring iron mouth, the iron mouth that is 100～200mm with the pre-drilling depth of taphole drilling machine after compensating bar mouth eye, thinks that follow-up pre-treatment step provides enough spaces of putting to good use.
Then, oxygen hose is kept flat and just to iron mouth, logical oxygen burns oxygen hose and the interior cold slag iron of smelting iron mouth passage inwards, until oxygen hose miles of relative movement approaches normal furnace wall thickness inwards time, oxygen hose is bent upwards, swing oxygen hose simultaneously and make oxygen hose spiral advance upwards to burn and smelting furnace in cold slag iron.Carry out on the upper edge that should as far as possible make oxygen hose be close to iron mouth passage while wherein, being bent upwards.The object of this step is in order to expand to greatest extent iron mouth-air port passage.And normal furnace wall thickness is the thickness of iron mouth passage contained bricking in the horizontal direction, it is about 800mm, and the diameter of iron mouth-air port passage is 150～200mm.
When carrying out above-mentioned steps, logical oxygen makes oxygen hose burn with cold slag iron in the passage of smelting iron mouth-air port to iron mouth direction from the air port of Tie Kou both sides, both in order to accelerate to get through Tie Kou-air port passage, also for the ease of the warm sludge iron after fusing, discharges smoothly.And after warm sludge flowing molten iron goes out, due to its temperature deficiency, mobility extreme difference, the very easily condensation and cannot discharging smoothly in the passage of Tie Kou-air port of slag iron, carry out drainage therefore need to continue logical oxygen heating slag iron.After passage burning in iron mouth-air port is logical, beats a small amount of stemming and block up and complete the pre-treatment of iron mouth.
For the ease of follow-up blow-on, pretreatment process of the present invention also comprises in advance to be made interim sand mouth, make iron mouth mud cover and making step tight and that dry is paved and clapped to main iron hook, a cleek and dry slag runner with yellow sand with refractory brick, stemming and yellow sand.Because oxygen hose is in use often because length needs to change not, therefore the present invention also comprises that butt welding oxygen hose is to increase the step of oxygen hose length in advance, this plays important effect for reducing the replacement frequency of oxygen hose and saving time.
In addition, before carrying out the pre-treatment of iron mouth, need adjust in advance oxygen pressure and be 0.50～0.55MPa to guarantee carrying out smoothly of preprocessing process, also need to be ready to enough butt welding oxygen hoses standby, check simultaneously and guarantee oxygen hose unimpeded, without gas leakage.
Below in conjunction with concrete example, describe the present invention in detail.
After the stewing stove of certain 2# of Iron And Steel Company banking, prepare blow-on, after ready work, 14:00 starts to carry out the pre-treatment of iron mouth, after preboring iron mouth, oxygen hose is kept flat, just iron mouth is burnt inward, when burning extremely approaches normal furnace wall thickness (about 800mm), the limit position of oxygen hose being close to edge on iron mouth passage is up bending, upwards burns the cold slag iron in stove; The oxygen hose front end that simultaneously swings, makes it to advance with spirrillum, thereby expands to greatest extent burn iron mouth-air port passage.
When burning iron mouth, use oxygen hose to burn toward iron mouth direction from the air port on Tie Kou both sides, to accelerate to get through Tie Kou-air port passage.22:30, when Dang Tiekou-air port passage reaches 180mm, iron mouth-air port channel connection, obviously, warm sludge iron starts to discharge the ejection of iron mouth place gas flame.
After slag flowing molten iron goes out, due to temperature deficiency, mobility extreme difference, condensation in iron mouth passage place and cannot discharging continuously.23:50, with oxygen hose continue logical oxygen and back and forth the slag iron after heating-condensing carry out drainage.
Next day 7:30, iron mouth-air port passage burn completely logical after, beat a small amount of stemming and block up (be about normal mud amount 1/3rd), wait for and answer wind.
10:58, multiple wind, reached product after 3 days, and blow-on is more in the past shortened time of recovery greatly.
In sum, the iron mouth pretreatment process while adopting blast furnace opening of the present invention, has realized blow-on fast, has reached product, has obtained good economic benefit.
Although the iron mouth pretreatment process when illustrating in conjunction with example above and having described blast furnace opening of the present invention, but what those skilled in the art will appreciate that is, in the case of not departing from the spirit and scope of the present invention that limit as claims, can make the various changes in form and details here.
Claims (6)
1. iron mouth pretreatment process during blast furnace opening, is characterized in that, described pretreatment process comprises the following steps:
Preboring iron mouth, oxygen hose is kept flat and just to iron mouth, logical oxygen burns oxygen hose and the interior cold slag iron of smelting iron mouth passage inwards, until oxygen hose miles of relative movement approaches normal furnace wall thickness inwards time, oxygen hose is bent upwards, swing oxygen hose simultaneously and make oxygen hose spiral advance upwards to burn and smelting furnace in cold slag iron;
Simultaneously, logical oxygen makes oxygen hose burn with cold slag iron in the passage of smelting iron mouth-air port to iron mouth direction from the air port of Tie Kou both sides, after warm sludge flowing molten iron goes out, continues logical oxygen heating slag iron and carries out drainage, after passage burning in iron mouth-air port is logical, blocks up and complete the pre-treatment of iron mouth.
2. iron mouth pretreatment process during blast furnace opening according to claim 1, is characterized in that, described pretreatment process also comprises the step of making in advance interim Sha Kou, iron mouth mud cover, main iron hook, an iron runner and dry slag runner.
3. iron mouth pretreatment process during blast furnace opening according to claim 1, is characterized in that, described pretreatment process also comprises that butt welding oxygen hose is to increase the step of oxygen hose length in advance.
4. iron mouth pretreatment process during blast furnace opening according to claim 1, is characterized in that, described pretreatment process also comprises adjusts the step that oxygen pressure is 0.50～0.55MPa in advance.
5. iron mouth pretreatment process during blast furnace opening according to claim 1, is characterized in that, the iron mouth degree of depth of described preboring is 100～200mm.
6. iron mouth pretreatment process during blast furnace opening according to claim 1, is characterized in that, the diameter of described iron mouth-air port passage is 150～200mm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201410016257.6A CN103757167B (en) | 2014-01-14 | 2014-01-14 | Iron mouth pretreatment process during a kind of blast furnace opening |
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| CN201410016257.6A CN103757167B (en) | 2014-01-14 | 2014-01-14 | Iron mouth pretreatment process during a kind of blast furnace opening |
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| CN103757167B CN103757167B (en) | 2015-11-04 |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105586458A (en) * | 2016-03-03 | 2016-05-18 | 重庆钢铁(集团)有限责任公司 | Iron notch burn-through method for blast furnace to return to work |
| CN105838835A (en) * | 2016-06-22 | 2016-08-10 | 山东钢铁股份有限公司 | Blast furnace blowing-in iron notch device and blast furnace blowing-in iron notch method |
| CN110643768A (en) * | 2019-01-23 | 2020-01-03 | 广东韶钢松山股份有限公司 | Method for controlling depth of newly-thrown taphole of blast furnace |
| CN114111332A (en) * | 2021-11-26 | 2022-03-01 | 攀钢集团攀枝花钢钒有限公司 | Method for improving discharge efficiency of smelting furnace |
| CN115198044A (en) * | 2022-06-30 | 2022-10-18 | 南京钢铁股份有限公司 | Method for rapidly processing blast furnace hearth freezing |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3819164A (en) * | 1972-10-13 | 1974-06-25 | Sydney Steel Corp | Operation of a blast furnace |
| CN201459153U (en) * | 2009-08-26 | 2010-05-12 | 鞍钢股份有限公司 | Oxygen nozzle in front of blast furnace |
-
2014
- 2014-01-14 CN CN201410016257.6A patent/CN103757167B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3819164A (en) * | 1972-10-13 | 1974-06-25 | Sydney Steel Corp | Operation of a blast furnace |
| CN201459153U (en) * | 2009-08-26 | 2010-05-12 | 鞍钢股份有限公司 | Oxygen nozzle in front of blast furnace |
Non-Patent Citations (1)
| Title |
|---|
| 张殿友: "《高炉炉前工》", 30 September 1978, 冶金工业出版社 * |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105586458A (en) * | 2016-03-03 | 2016-05-18 | 重庆钢铁(集团)有限责任公司 | Iron notch burn-through method for blast furnace to return to work |
| CN105838835A (en) * | 2016-06-22 | 2016-08-10 | 山东钢铁股份有限公司 | Blast furnace blowing-in iron notch device and blast furnace blowing-in iron notch method |
| CN110643768A (en) * | 2019-01-23 | 2020-01-03 | 广东韶钢松山股份有限公司 | Method for controlling depth of newly-thrown taphole of blast furnace |
| CN110643768B (en) * | 2019-01-23 | 2021-08-31 | 广东韶钢松山股份有限公司 | Method for controlling depth of newly-thrown taphole of blast furnace |
| CN114111332A (en) * | 2021-11-26 | 2022-03-01 | 攀钢集团攀枝花钢钒有限公司 | Method for improving discharge efficiency of smelting furnace |
| CN114111332B (en) * | 2021-11-26 | 2023-11-21 | 攀钢集团攀枝花钢钒有限公司 | Method for improving smelting furnace discharging efficiency |
| CN115198044A (en) * | 2022-06-30 | 2022-10-18 | 南京钢铁股份有限公司 | Method for rapidly processing blast furnace hearth freezing |
| CN115198044B (en) * | 2022-06-30 | 2023-09-22 | 南京钢铁股份有限公司 | Method for rapidly treating freezing of blast furnace hearth |
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| CN103757167B (en) | 2015-11-04 |
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