CN113564286A - Iron notch switching operation method without affecting blast furnace condition - Google Patents
Iron notch switching operation method without affecting blast furnace condition Download PDFInfo
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- CN113564286A CN113564286A CN202110792763.4A CN202110792763A CN113564286A CN 113564286 A CN113564286 A CN 113564286A CN 202110792763 A CN202110792763 A CN 202110792763A CN 113564286 A CN113564286 A CN 113564286A
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- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 290
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 145
- 238000000034 method Methods 0.000 title claims abstract description 29
- 238000010079 rubber tapping Methods 0.000 claims abstract description 54
- 238000004519 manufacturing process Methods 0.000 claims abstract description 19
- 239000002893 slag Substances 0.000 claims description 23
- 239000002184 metal Substances 0.000 claims description 15
- 229910052751 metal Inorganic materials 0.000 claims description 15
- 239000000428 dust Substances 0.000 claims description 10
- 238000002360 preparation method Methods 0.000 claims description 10
- 238000005266 casting Methods 0.000 claims description 7
- 230000007613 environmental effect Effects 0.000 claims description 6
- 238000007689 inspection Methods 0.000 claims description 6
- 239000000571 coke Substances 0.000 claims description 4
- 229910001018 Cast iron Inorganic materials 0.000 claims description 3
- 230000000903 blocking effect Effects 0.000 claims description 3
- 238000011010 flushing procedure Methods 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000011017 operating method Methods 0.000 claims 1
- 238000009826 distribution Methods 0.000 abstract description 8
- 239000000463 material Substances 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 238000003723 Smelting Methods 0.000 description 2
- 229910000746 Structural steel Inorganic materials 0.000 description 2
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 239000001301 oxygen Substances 0.000 description 2
- 229910052760 oxygen Inorganic materials 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 238000005469 granulation Methods 0.000 description 1
- 230000003179 granulation Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000008520 organization Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 238000012795 verification Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
-
- 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 an operation method for switching iron notch without affecting the condition of a blast furnace, wherein four iron notches are arranged on the blast furnace, and two iron notches work and the other two iron notches are reserved; the method for switching the taphole comprises the following steps: 1) after a new taphole of the blast furnace is put on, two old tapholes are matched for tapping, namely three tapholes are circularly tapped; 2) stopping an old taphole, and tapping according to a mode that a new taphole is provided with the old taphole; 3) and after the new iron notch is normally put, performing another new iron notch switching operation according to the mode of the step 1 and the step 2. The problems of air flow distribution in the furnace, pressure difference and thermal load fluctuation caused by the replacement of the position of the tap hole are solved, so that the bottleneck that the tap hole and the rest hole influence the production stability of the blast furnace is overcome, the production efficiency is improved, and the continuity and the stability of the production of the blast furnace are ensured.
Description
Technical Field
The invention relates to the technical field of blast furnace smelting, in particular to an iron notch switching operation method without influencing the condition of a blast furnace.
Background
The smelting blast furnace is generally provided with four tapholes and has two purposes. And (4) normally producing two pairs of angle iron outlets for tapping, and maintaining the other two pairs of angle iron outlets for later use. The daily switching of the iron notch basically always attacks the operation mode of the conventional switching iron notch: namely, a new taphole is used for stopping an old taphole, the time of one day is finished, every other day, a new taphole is used for stopping an old taphole, and the switching of four tapholes is finished in three days; however, in the process of switching the tapholes and in the initial tapping stage of two new tapholes after the tapholes are switched, the instability of the initial tapping of the new taphole feeding due to the replacement of the taphole position has different influences on the airflow distribution, the pressure difference and the heat load in the blast furnace, the corresponding adjustment needs to be carried out in the furnace, measures such as reducing the wind, controlling the oxygen, adding light materials and the like are adopted to ensure the smooth operation of the blast furnace, and the stability and the yield of the operation in the furnace are directly influenced.
Disclosure of Invention
Aiming at the defects in the prior art, the technical problem to be solved by the invention is to provide the iron notch switching operation method which does not influence the furnace condition of the blast furnace, overcomes the bottleneck that the iron notch throwing and rest affects the production stability of the blast furnace, and improves the production efficiency.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows:
the method for switching the tapholes without influencing the furnace condition of the blast furnace comprises the following steps of:
1) after a new taphole of the blast furnace is put on, two old tapholes are matched for tapping, namely three tapholes are circularly tapped;
2) stopping an old taphole, and tapping according to a mode that a new taphole is provided with the old taphole;
3) and after the new iron notch is normally put, performing another new iron notch switching operation according to the mode of the step 1 and the step 2.
Wherein,
before the step 1, preparation work is carried out, and the preparation work comprises the following steps:
contacting a production operation department one day before the groove is cast, and leading the torpedo ladle to be heavy to the air when the groove is cast;
confirming that the baking of each ditch and the swinging spout in front of the furnace is finished and tapping conditions are met;
the comprehensive inspection of mechanical, hydraulic, electrical and the like of a plurality of devices is carried out two days ahead of the furnace and point inspection in advance, so that the normal operation of the devices is ensured during the switching operation of a new taphole;
preparing for tapping before casting a channel in a stokehole operation area;
and checking and confirming the working state of the slag flushing system and the environment-friendly dust removal system after starting.
In step 1, the taphole switching operation method includes the following steps:
the preparation of tapping is confirmed to be ready, the taphole mud sleeve is intact, the gun nozzle is confirmed to be matched with the mud sleeve surface, the slag skimmer is unblocked, the slag treatment is ready, and the granulated slag water is opened; the torpedo hot metal mixer car is accurately in place, and the torpedo hot metal mixer car body is not inclined; confirming that each dust suction point for dust removal in front of the furnace starts to suck air;
performing trial operation on the equipment and confirming the equipment to be normal;
the opening uses a drill rod which is one size larger than the normal drill rod, coke clamping is prevented, the actual depth of the taphole is confirmed, and the normal drill rod is used for opening after the taphole is normal;
a newly-cast iron notch is shallow, the tapping time is too short, and a furnace can be continuously tapped;
adjusting the amount of the blocking mud according to the depth and the condition of the taphole; and finally, carrying out three iron notch circulating tapping.
The three iron notch circulating tapping is as follows:
when the No. 2 and No. 4 iron openings are normally tapped, if the No. 1 iron opening is selected for a new iron opening, the iron openings are circularly operated according to the sequence of 1-4-1-4-2 at the early stage of the switching of the iron openings, the tapping of the new iron opening is strengthened, and the circular operation is carried out according to the sequence of 4-2-4-1 of the main iron opening and the auxiliary iron opening after the new iron opening is stabilized; if the new iron notch is selected to be No. 3, the iron notch is circularly operated according to the sequence of 3-2-3-2-4 in the earlier stage of iron notch switching, the tapping of the new iron notch is enhanced, and the hot metal ladle is circularly operated according to the sequence of 2-4-2-3 of the main iron notch and the auxiliary iron notch after the new iron notch is stabilized, so that the pressure of the hot metal ladle on the empty and slag treatment switching and the environmental protection is reduced.
Or the three iron notch circulating tapping is as follows:
when the number 1 and the number 3 of the iron openings are normally tapped, if the number 2 is selected for a new iron opening, the iron openings are circularly operated according to the sequence of 2-3-2-3-1 at the earlier stage of the iron opening switching, the tapping of the new iron opening is strengthened, and the circular operation is carried out according to the sequence of 3-1-3-2 of the main iron opening and the auxiliary iron opening after the new iron opening is stabilized; if the number 4 is selected for the new iron notch, the iron notch is circularly operated according to the sequence of 4-1-4-1-3 in the earlier stage of iron notch switching, the tapping of the new iron notch is enhanced, and the circular operation is carried out according to the sequence of 1-3-1-4 of the main iron notch and the auxiliary iron notch after the new iron notch is stabilized, so that the pressure of the hot metal ladle on the empty and slag treatment switching and the environmental protection is reduced.
Compared with the prior art, the invention has the following advantages:
the method for switching the taphole without influencing the furnace condition of the blast furnace has reasonable design, solves the problems of air flow distribution, pressure difference and thermal load fluctuation in the furnace caused by the replacement of the taphole position, thereby overcoming the bottleneck of influencing the production stability of the blast furnace by the taphole throwing and the taphole breaking, improving the production efficiency and ensuring the continuity and the stability of the production of the blast furnace.
Drawings
The contents of the description and the references in the drawings are briefly described as follows:
FIG. 1 is a schematic view of the position of a blast furnace taphole according to the present invention.
FIG. 2 is a schematic view of the blast furnace gas flow, pressure differential and heat load according to the present invention.
Fig. 3 is a schematic diagram showing comparison between before and after the taphole switching method of the present invention is implemented.
In the figure:
Detailed Description
The following description of the embodiments of the present invention will be made in detail with reference to the accompanying drawings.
As shown in the figure 1 and the figure 2, the method for switching the taphole without influencing the furnace condition of the blast furnace overcomes the bottleneck that the taphole throwing and the taphole breaking influence the production stability of the blast furnace, improves the production efficiency and ensures the continuity and the stability of the production of the blast furnace.
Aiming at the difficult problems of air flow distribution, pressure difference and thermal load fluctuation in the blast furnace caused by the daily iron notch switching and the iron notch position replacement of the blast furnace, the invention develops a safe, reliable and effective blast furnace iron notch switching operation method; the method can meet the requirement of daily tap hole switching of the blast furnace, and can also solve the adverse effect on the operation in the blast furnace caused by the position replacement and unstable tapping of the tap hole during the tap hole switching; meanwhile, the furnace condition is stable during the switching of the tapholes, and in turn, favorable conditions are provided for the quick recovery of new tapholes.
Four tapholes are arranged on the blast furnace, wherein the four tapholes are respectively a No. 1 taphole, a No. 2 taphole, a No. 3 taphole and a No. 4 taphole, and two tapholes work and the other two tapholes are reserved.
The method for switching the taphole comprises the following steps:
considering that the old runner still needs to be operated on line for a period of time when the iron notch is switched, calculating the iron passing amount before the furnace in order to ensure the safety of the old runner, and starting the iron notch switching operation one week before the expiration of the old runner;
after a new taphole of the blast furnace is put on, two old tapholes are matched for tapping, namely three tapholes are circularly tapped; strengthening the tapping of a new taphole at the early stage of the taphole casting (about 1 day), judging whether the actual states of the new taphole and the groove reach the requirements in the furnace, converting the actual states into the tapping of a main taphole and an auxiliary taphole (about 2 days), finally confirming whether the new taphole is normal, meeting the requirements in the furnace, and stopping an old groove after meeting the conditions;
stopping an old taphole, and tapping according to a mode that a new taphole is provided with the old taphole; after the new iron notch casting condition is normal, another new iron notch switching operation is carried out according to the mode; specifically, after confirming that the new taphole casting condition is normal one day later, the casting operation of another new channel is carried out, and the operation is carried out according to the same mode.
The invention can effectively control the airflow distribution in the furnace and balance the pressure difference and the heat load in the furnace through the alternate tapping of the three tapholes; through practical operation verification, in the blast furnace taphole switching period, airflow distribution, pressure difference and heat load in the blast furnace are stable, the phenomenon of reducing wind, controlling oxygen and adding light materials caused by taphole switching, poor taphole condition and unsmooth slag iron in the blast furnace does not occur, and the blast furnace production is in a stable and smooth state; three tapholes are used for tapping, when the tapholes are in poor conditions, the tapping sequence can be flexibly adjusted, sufficient time is provided for maintaining the taphole pore channels and the mud bags, and tapping is safer.
The preparation work is carried out before the iron notch is switched, and the preparation work comprises the following steps:
contacting a production operation department one day before the groove is cast, and leading the torpedo ladle to be heavy to the air when the groove is cast;
confirming that the baking of each ditch and the swinging spout in front of the furnace is finished and tapping conditions are met;
the comprehensive inspection of mechanical, hydraulic, electrical and the like of a plurality of devices is carried out two days ahead of the furnace and point inspection in advance, so that the normal operation of the devices is ensured during the switching operation of a new taphole;
preparing for tapping before casting a channel in a stokehole operation area;
and checking and confirming the working state of the slag flushing system and the environment-friendly dust removal system after starting.
Preferably, the taphole switching operation method comprises the following steps:
the preparation of tapping is confirmed to be ready, the taphole mud sleeve is intact, the gun nozzle is confirmed to be matched with the mud sleeve surface, the slag skimmer is unblocked, the slag treatment is ready, and the granulated slag water is opened; the torpedo hot metal mixer car is accurately in place, and the torpedo hot metal mixer car body is not inclined; confirming that each dust suction point for dust removal in front of the furnace starts to suck air;
performing trial operation on the equipment and confirming the equipment to be normal;
the opening uses a drill rod which is one size larger than the normal drill rod, coke clamping is prevented, the actual depth of the taphole is confirmed, and the normal drill rod is used for opening after the taphole is normal;
a newly-cast iron notch is shallow, the tapping time is too short, and a furnace can be continuously tapped;
adjusting the amount of the blocking mud according to the depth and the condition of the taphole; and finally, carrying out three iron notch circulating tapping.
Wherein, the three tapholes are circularly cast:
when the No. 2 and No. 4 iron openings are normally tapped, if the No. 1 iron opening is selected for a new iron opening, the iron openings are circularly operated according to the sequence of 1-4-1-4-2 at the early stage of the switching of the iron openings, the tapping of the new iron opening is strengthened, and the circular operation is carried out according to the sequence of 4-2-4-1 of the main iron opening and the auxiliary iron opening after the new iron opening is stabilized; if the new iron notch is selected to be No. 3, the iron notch is circularly operated according to the sequence of 3-2-3-2-4 in the earlier stage of iron notch switching, the tapping of the new iron notch is enhanced, and the hot metal ladle is circularly operated according to the sequence of 2-4-2-3 of the main iron notch and the auxiliary iron notch after the new iron notch is stabilized, so that the pressure of the hot metal ladle on the empty and slag treatment switching and the environmental protection is reduced.
Or the three iron notch circulating tapping is as follows:
when the number 1 and the number 3 of the iron openings are normally tapped, if the number 2 is selected for a new iron opening, the iron openings are circularly operated according to the sequence of 2-3-2-3-1 at the earlier stage of the iron opening switching, the tapping of the new iron opening is strengthened, and the circular operation is carried out according to the sequence of 3-1-3-2 of the main iron opening and the auxiliary iron opening after the new iron opening is stabilized; if the number 4 is selected for the new iron notch, the iron notch is circularly operated according to the sequence of 4-1-4-1-3 in the earlier stage of iron notch switching, the tapping of the new iron notch is enhanced, and the circular operation is carried out according to the sequence of 1-3-1-4 of the main iron notch and the auxiliary iron notch after the new iron notch is stabilized, so that the pressure of the hot metal ladle on the empty and slag treatment switching and the environmental protection is reduced.
The production conditions of the invention are compared and shown in the drawing 3 before and after the iron notch switching method is implemented. It can be seen from the table that before the new method for switching the taphole is not implemented, in the process of switching the taphole once in the background technology, the average daily output three days before the groove feeding is 8085 tons, the average daily output three days after the groove feeding is 7650 tons, the average daily output is 435 tons, the total output loss three days is 1305 tons, the airflow in the furnace is disordered, the pipeline airflow even appears in the furnace in the later period, the condition of adding light materials to transition the furnace is added, and the total coke loss is 73 tons; the air quantity in the furnace is blocked, the pressure difference is high, the heat load of the cooling wall is high, the airflow is disordered, the pipeline airflow appears, and the furnace condition is difficult to operate.
After the novel method for switching the iron notch is implemented, the yield is basically stable, the air flow is stable, the furnace condition is adjusted without adding light materials, and the furnace condition is in a stable and smooth state in the whole iron notch switching process; it can be seen from FIG. 2 that during the iron notch switching period of the present invention, the blast furnace gas flow distribution, the pressure difference and the heat load are stable, and the blast furnace condition is stable and smooth.
In the implementation process of the invention, the following matters are taken: when the iron notch is thrown for operation, the slag is ensured not to enter the tank, and the furnace front is responsible for organization; closely watching the change of the liquid level of the main runner and the size of the iron flow; if the slag is dissolved firstly, a coke powder dam at the head of the iron runner is timely reinforced to ensure that the slag enters a dry slag pit or a granulation tower, and a heat preservation agent is thrown into a main runner and a small well; if molten iron comes first, the coke powder dam at the head of the iron runner should be removed in time; the nozzle swinging worker monitors that molten iron flows into the swinging nozzle to the molten iron receiving tank, and the new nozzle swinging angle is properly set to be 3-5 degrees; when the iron amount of the new channel is less than 400 tons for the first time, the new channel needs to be continuously connected once; when the weight is more than 400 tons, the continuous discharge can be avoided, but the interval time cannot exceed 3 hours; three-channel alternative tapping (particularly after the first iron feeding of a new channel), keeping the temperature of the skimmer, and turning off the dust removal after finishing the iron preparation operation; the condition of the skimmer must be checked before tapping the iron notch with long tapping interval, and tapping can be performed after the skimmer is determined to be smooth.
The method for switching the taphole without influencing the furnace condition of the blast furnace has reasonable design, solves the problems of air flow distribution, pressure difference and thermal load fluctuation in the furnace caused by the replacement of the taphole, thereby overcoming the bottleneck of influencing the production stability of the blast furnace by the taphole throwing and the taphole breaking, improving the production efficiency and ensuring the continuity and the stability of the production of the blast furnace.
The above-mentioned features are merely for describing preferred embodiments of the present invention and may be arbitrarily combined to form a plurality of embodiments of the present invention.
The invention is described above with reference to the accompanying drawings, it is obvious that the specific implementation of the invention is not limited by the above-mentioned manner, and it is within the scope of the invention to adopt various insubstantial modifications of the inventive concept and solution, or to apply the inventive concept and solution directly to other applications without modification.
Claims (5)
1. The utility model provides a do not influence blast furnace condition's switching iron notch operating method, set up four tapholes on the blast furnace, two work other two are reserve, its characterized in that:
the iron notch switching operation method comprises the following steps:
1) after a new taphole of the blast furnace is put on, two old tapholes are matched for tapping, namely three tapholes are circularly tapped;
2) stopping an old taphole, and tapping according to a mode that a new taphole is provided with the old taphole;
3) and after the new iron notch is normally put, performing another new iron notch switching operation according to the mode of the step 1 and the step 2.
2. The method of switching the taphole operating without affecting the furnace condition of the blast furnace according to claim 1, wherein: before the step 1, preparation work is carried out, and the preparation work comprises the following steps:
contacting a production operation department one day before the groove is cast, and leading the torpedo ladle to be heavy to the air when the groove is cast;
confirming that the baking of each ditch and the swinging spout in front of the furnace is finished and tapping conditions are met;
the comprehensive inspection of mechanical, hydraulic, electrical and the like of a plurality of devices is carried out two days ahead of the furnace and point inspection in advance, so that the normal operation of the devices is ensured during the switching operation of a new taphole;
preparing for tapping before casting a channel in a stokehole operation area;
and checking and confirming the working state of the slag flushing system and the environment-friendly dust removal system after starting.
3. The method of switching the taphole operating without affecting the furnace condition of the blast furnace according to claim 1, wherein: in step 1, the taphole switching operation method includes the following steps:
the preparation of tapping is confirmed to be ready, the taphole mud sleeve is intact, the gun nozzle is confirmed to be matched with the mud sleeve surface, the slag skimmer is unblocked, the slag treatment is ready, and the granulated slag water is opened; the torpedo hot metal mixer car is accurately in place, and the torpedo hot metal mixer car body is not inclined; confirming that each dust suction point for dust removal in front of the furnace starts to suck air;
performing trial operation on the equipment and confirming the equipment to be normal;
the opening uses a drill rod which is one size larger than the normal drill rod, coke clamping is prevented, the actual depth of the taphole is confirmed, and the normal drill rod is used for opening after the taphole is normal;
a newly-cast iron notch is shallow, the tapping time is too short, and a furnace can be continuously tapped;
adjusting the amount of the blocking mud according to the depth and the condition of the taphole; and finally, carrying out three iron notch circulating tapping.
4. The method of switching the taphole operating without affecting the furnace condition of the blast furnace according to claim 3, wherein: the three iron notch circulating tapping is as follows:
when the No. 2 and No. 4 iron openings are normally tapped, if the No. 1 iron opening is selected for a new iron opening, the iron openings are circularly operated according to the sequence of 1-4-1-4-2 at the early stage of the switching of the iron openings, the tapping of the new iron opening is strengthened, and the circular operation is carried out according to the sequence of 4-2-4-1 of the main iron opening and the auxiliary iron opening after the new iron opening is stabilized; if the new iron notch is selected to be No. 3, the iron notch is circularly operated according to the sequence of 3-2-3-2-4 in the earlier stage of iron notch switching, the tapping of the new iron notch is enhanced, and the hot metal ladle is circularly operated according to the sequence of 2-4-2-3 of the main iron notch and the auxiliary iron notch after the new iron notch is stabilized, so that the pressure of the hot metal ladle on the empty and slag treatment switching and the environmental protection is reduced.
5. The method of switching the taphole operating without affecting the furnace condition of the blast furnace according to claim 3, wherein: the three iron notch circulating tapping is as follows:
when the number 1 and the number 3 of the iron openings are normally tapped, if the number 2 is selected for a new iron opening, the iron openings are circularly operated according to the sequence of 2-3-2-3-1 at the earlier stage of the iron opening switching, the tapping of the new iron opening is strengthened, and the circular operation is carried out according to the sequence of 3-1-3-2 of the main iron opening and the auxiliary iron opening after the new iron opening is stabilized; if the number 4 is selected for the new iron notch, the iron notch is circularly operated according to the sequence of 4-1-4-1-3 in the earlier stage of iron notch switching, the tapping of the new iron notch is enhanced, and the circular operation is carried out according to the sequence of 1-3-1-4 of the main iron notch and the auxiliary iron notch after the new iron notch is stabilized, so that the pressure of the hot metal ladle on the empty and slag treatment switching and the environmental protection is reduced.
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| CN202110792763.4A CN113564286A (en) | 2021-07-14 | 2021-07-14 | Iron notch switching operation method without affecting blast furnace condition |
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| CN202110792763.4A CN113564286A (en) | 2021-07-14 | 2021-07-14 | Iron notch switching operation method without affecting blast furnace condition |
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Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112899424A (en) * | 2021-01-15 | 2021-06-04 | 山东钢铁集团日照有限公司 | Method for pouring and tapping oversize blast furnace |
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112899424A (en) * | 2021-01-15 | 2021-06-04 | 山东钢铁集团日照有限公司 | Method for pouring and tapping oversize blast furnace |
Non-Patent Citations (2)
| Title |
|---|
| 张福忠: "唐钢南区3200m3高炉提高风温生产实践", 《河北冶金》, no. 3, 28 March 2014 (2014-03-28), pages 36 - 39 * |
| 盛亚: "武钢5号高炉出铁倒场模式分析", 《武钢技术》, vol. 53, no. 2, 26 April 2015 (2015-04-26), pages 13 - 15 * |
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