CN112899425A - Method for preventing slag bonding of blast furnace sludge sleeve - Google Patents
Method for preventing slag bonding of blast furnace sludge sleeve Download PDFInfo
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- CN112899425A CN112899425A CN202110057984.7A CN202110057984A CN112899425A CN 112899425 A CN112899425 A CN 112899425A CN 202110057984 A CN202110057984 A CN 202110057984A CN 112899425 A CN112899425 A CN 112899425A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
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- C21B7/12—Opening or sealing the tap holes
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- C21B5/00—Making pig-iron in the blast furnace
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Abstract
The invention relates to the field of steel smelting, in particular to a method for preventing slag bonding of a blast furnace sludge sleeve, which comprises the following steps: s1, mixing the river sand and the coke powder uniformly and airing to obtain a protective material; s2, removing impurities on the surface of the mud sleeve, and repairing the damaged position of the surface of the mud sleeve; s3, paving a heat-insulating layer with the height of 3-15 cm and the width of 35-60 cm on the periphery of the mud sleeve by using the split charging heat-insulating agent; s4, paving a protective layer with the width of 25-45 cm at the lower end and the width of 5-25 cm at the upper end on the protective material mixed in the step S1 in the heat preservation of the step S3, wherein the lower end of the protective layer is in contact with the heat preservation layer, and the top end of the protective layer is flush with the center line of the taphole hole; s5 drilling the iron notch and then plugging the notch. The invention can effectively reduce the risk hidden danger of blocking the opening and running mud and not blocking the opening, simultaneously reduce the damage of slag iron to the mud sleeve, prolong the service life of the mud sleeve, save the cost and reduce the workload of a stokehole iron taphole worker.
Description
Technical Field
The invention relates to the field of iron and steel smelting, in particular to a method for preventing slag bonding of a blast furnace sludge sleeve.
Technical Field
At present, iron slag produced by blast furnace smelting is discharged from a blast furnace taphole, so that the aim of continuous production of a blast furnace is fulfilled. The operation of the blast furnace taphole is an important link in the production of the blast furnace, the maintenance of the blast furnace taphole directly influences the discharge of iron slag and the smooth operation of furnace conditions, the taphole operation mainly comprises tapping operation before tapping iron, plugging operation after removing clean iron slag, taphole mud sleeve maintenance and taphole mud bag formation maintenance. Among them is the important ring for maintenance of the taphole mud sleeve.
The iron notch mud sleeve slagging is a main factor influencing the maintenance of the iron notch mud sleeve. The iron notch mud cover slagging part is mainly below the iron notch mud cover, and high temperature slag iron drips in the iron notch below during the tapping, and partial slag iron and iron notch lower surface contact bond together with the mud cover surface bonding at high temperature, form hard bonding body after the cooling, hardly clean up, lead to iron notch mud cover surface not smooth, and the leak mud appears in the sprue, and the serious incident such as molten iron overflow can lead to the sprue failure seriously after the molten iron jar is full.
The existing iron notch mud sleeve slagging treatment method comprises the following steps: firstly, steel drill rods are used for poking away the slagging scorification to process large blocks of slagging scorification, but the iron notch area is high in temperature, the iron notch light is strong, the processing difficulty is high, particularly, the slag iron which is tightly bonded is difficult to poke away, and a mud sleeve is poked away or the slagging scorification is not poked away. Compressed air or oxygen are used for blowing, the mud sleeve is easily blown by oxygen, the safety risk of oxygen burning at a high-temperature slag iron position is large, compressed air is generally used for blowing the surface of the mud sleeve before the blockage, blowing is not clean if the slag iron is bonded tightly, the mud sleeve is blown together with the slag material or the mud sleeve surface is blown to be damaged due to long-time blowing, and no quick and effective method is available for slagging on the surface of the mud sleeve.
Therefore, a method for preventing the mud sleeve from slagging in the tapping period is developed, so that the risk of blocking the tap hole can be reduced, the tap hole can be effectively maintained, and the labor intensity of workers in front of the furnace can be effectively reduced.
Disclosure of Invention
The present invention is directed to overcoming the problems of the prior art as described above and providing a method for preventing slag accretion in a blast furnace sludge sleeve.
The purpose of the invention is realized by the following technical scheme:
a method for preventing slag bonding of a blast furnace sludge sleeve comprises the following steps:
s1, uniformly mixing river sand and coke powder according to a weight ratio of (8-9) to (0.5-1.5), and airing to obtain a protective material;
s2, removing impurities on the surface of the mud sleeve, and repairing the damaged position of the surface of the mud sleeve;
s3, paving a heat preservation layer with the height of 3-15 cm and the width of 35-60 cm on the periphery of the mud sleeve by using the split charging heat preservation agent;
s4, paving a protective layer with the width of 25-45 cm at the lower end and the width of 5-25 cm at the upper end on the protective material obtained by mixing in the step S1 on the heat preservation in the step S3, wherein the lower end of the protective layer is in contact with the heat preservation layer, and the top end of the protective layer is level with the central line of the taphole hole;
s5, drilling an iron notch and then plugging the notch.
Preferably, in the step S1, the weight ratio of the river sand to the coke powder is 9:1.
Preferably, in the step S2, in the process of removing impurities on the surface of the mud sleeve, impurities in the position 40-70 cm in front of the mud sleeve are removed completely.
Preferably, in the step S2, the damaged position of the mud cover film is repaired, and the damaged position of the mud cover surface is ground.
Preferably, in the step S3, the height of the heat insulation layer is 5-10 cm.
Preferably, in the step S3, the width of the heat insulation layer is 40-50 cm.
Preferably, in the step S4, the width of the lower end of the protective layer is 30-40 cm.
Preferably, in the step S4, the width of the upper end of the release layer is 10 to 20 cm.
Preferably, in the step S5, in the process of drilling the taphole, when the tapping machine starts to drill the taphole, no water vapor is opened before drilling for 20 cm; and after drilling for 20cm, fully opening water vapor.
Preferably, in the step S5, in the plugging operation, the tuyere of the iron notch is used to pry off the large slag outside the mud sleeve, the protective layer is blown off by compressed air with a pressure of 0.5 to 0.8MPa, and the hydraulic gun is opened to plug the opening.
Compared with the prior art, the invention has the following technical effects:
the invention discloses a method for preventing blast furnace sludge from being coated with slag, which adopts a mixed material of river sand and coke powder as a protective material, the coke powder is not easy to bond and easy to clean after being mixed with the river sand, and the coke powder has relatively high density and cannot be easily blown off by an atomizing device of a tapping machine. River sand and coke powder are used as a protective layer, and the dropped paste water is bonded and cooled on the protective layer, so that the direct contact of molten iron on the surface of the mud sleeve is avoided, and the mud sleeve is effectively protected. The slag iron on the protective layer is pried off after the air comes from the taphole, the protective layer is swept by compressed air, the taphole surface is effectively protected, the taphole hydraulic gun muzzle and the mud sleeve surface are tightly connected, the frequent phenomenon of the taphole caused by taphole mud sleeve bonding slag is effectively avoided, and the taphole stabilizing rate is greatly improved. The invention can well ensure the flatness of the mud sleeve surface of the taphole during the taphole plugging, effectively reduce the risk hidden danger of taphole mud leakage and non-taphole plugging, simultaneously reduce the damage of slag iron to the mud sleeve, prolong the service life of the mud sleeve, save the cost and reduce the workload of the taphole worker in front of the furnace.
Drawings
FIG. 1 is a schematic view of a blast furnace.
Description of reference numerals:
1. a furnace wall; 2. mud bagging; 3. a taphole channel; 4. mud sheathing; 5. a heat-insulating layer; 6. a protective layer; 7. the center line of the iron notch.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below with reference to specific examples and comparative examples. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
Unless otherwise specified, the devices used in the present examples, comparative examples and experimental examples were all conventional experimental devices, the materials and reagents used were commercially available without specific reference, and the experimental methods without specific reference were also conventional experimental methods.
Example 1 method for preventing slag bonding of blast furnace sludge sleeve
The method comprises the following steps:
s1, uniformly mixing river sand and coke powder according to a weight ratio of 8:0.5, and airing to obtain a protective material;
s2, cleaning the periphery of the mud sleeve 4: after the hydraulic gun is withdrawn, cleaning up sundries such as iron slag, stemming and the like around the taphole mud sleeve, and ensuring that the iron slag at the position 40cm in front of the mud sleeve is cleaned up;
cleaning the surface of the mud cover: after the hydraulic gun is withdrawn, cleaning the stemming adhered to the surface of the mud sleeve to ensure that the surface of the taphole is smooth, and if the surface of the mud sleeve is damaged, repairing and grinding the mud sleeve;
s3, paving a layer of heat preservation layer 5 with the height of 3cm and the width of 35cm on the periphery of the mud sleeve by using the split charging heat preservation agent;
s4, paving a protective layer with the width of 25cm at the lower end and the width of 5cm at the upper end on the protective material obtained by mixing in the step S1 on the heat preservation in the step S3, wherein the lower end of the protective layer 7 is in contact with the heat preservation layer, and the top end of the protective layer 7 is level with the central line of the taphole hole;
s5, water vapor is not opened before the tapping machine starts to drill the iron notch, and the water vapor is opened completely when the drilling is carried out for 20 cm;
and (3) plugging operation: and (3) using a steel chisel to pry off large outside slag at an iron notch air inlet, blowing off the outer surface retaining wall by using compressed air (with the pressure of 0.5MPa), and then opening a hydraulic gun plugging port.
Example 2 method for preventing slag bonding of blast furnace sludge sleeve
The method comprises the following steps:
s1, uniformly mixing river sand and coke powder according to a weight ratio of 9:1.5, and airing to obtain a protective material;
s2, cleaning the periphery of the mud sleeve 4: after the hydraulic gun is withdrawn, cleaning up sundries such as iron slag, stemming and the like around the taphole mud sleeve, and ensuring that the iron slag at the position 70cm in front of the mud sleeve is cleaned up;
cleaning the surface of the mud cover: after the hydraulic gun is withdrawn, cleaning the stemming adhered to the surface of the mud sleeve to ensure that the surface of the taphole is smooth, and if the surface of the mud sleeve is damaged, repairing and grinding the mud sleeve;
s3, paving a heat-insulating layer 5 with the height of 15cm and the width of 60cm on the periphery of the mud sleeve by using the split charging heat-insulating agent;
s4, paving a protective layer with the width of 45cm at the lower end and the width of 25cm at the upper end on the protective material obtained by mixing in the step S1 on the heat preservation in the step S3, wherein the lower end of the protective layer 7 is in contact with the heat preservation layer, and the top end of the protective layer 7 is aligned with the central line of the taphole hole;
s5, water vapor is not opened before the tapping machine starts to drill the iron notch, and the water vapor is opened completely when the drilling is carried out for 20 cm;
and (3) plugging operation: and (3) using a steel chisel to pry off large outside slag at an iron notch air inlet, blowing off the outer surface retaining wall by using compressed air (the pressure is 0.8MPa), and then opening a hydraulic gun plugging port.
Example 3 method for preventing slag bonding of blast furnace sludge sleeve
The method comprises the following steps:
s1, uniformly mixing river sand and coke powder according to a weight ratio of 9:1, and airing to obtain a protective material;
s2, cleaning the periphery of the mud sleeve 4: after the hydraulic gun is withdrawn, cleaning up sundries such as iron slag, stemming and the like around the taphole mud sleeve, and ensuring that the iron slag at the position 60cm in front of the mud sleeve is cleaned up;
cleaning the surface of the mud cover: after the hydraulic gun is withdrawn, cleaning the stemming adhered to the surface of the mud sleeve to ensure that the surface of the taphole is smooth, and if the surface of the mud sleeve is damaged, repairing and grinding the mud sleeve;
s3, paving a heat-insulating layer 5 with the height of 8cm and the width of 45cm on the periphery of the mud sleeve by using the split charging heat-insulating agent;
s4, paving a protective layer with the width of 35cm at the lower end and the width of 15cm at the upper end on the protective material obtained by mixing in the step S1 on the heat preservation in the step S3, wherein the lower end of the protective layer 7 is in contact with the heat preservation layer, and the top end of the protective layer 7 is aligned with the central line of the taphole hole;
s5, water vapor is not opened before the tapping machine starts to drill the iron notch, and the water vapor is opened completely when the drilling is carried out for 20 cm;
and (3) plugging operation: and (3) using a steel chisel to pry off large outside slag at an iron notch air inlet, and then blowing off the outer surface retaining wall by using compressed air (with the pressure of 0.6MPa) and then opening a hydraulic gun plugging port.
Comparative example 1 method for preventing slag bonding of blast furnace sludge sleeve
The method comprises the following steps:
s1, uniformly mixing river sand and coke powder according to a weight ratio of 8:5, and airing to obtain a protective material;
s2, cleaning the periphery of the mud sleeve 4: after the hydraulic gun is withdrawn, cleaning up sundries such as iron slag, stemming and the like around the taphole mud sleeve, and ensuring that the iron slag at the position 60cm in front of the mud sleeve is cleaned up;
cleaning the surface of the mud cover: after the hydraulic gun is withdrawn, cleaning the stemming adhered to the surface of the mud sleeve to ensure that the surface of the taphole is smooth, and if the surface of the mud sleeve is damaged, repairing and grinding the mud sleeve;
s3, paving a heat-insulating layer 5 with the height of 8cm and the width of 45cm on the periphery of the mud sleeve by using the split charging heat-insulating agent;
s4, paving a protective layer with the width of 35cm at the lower end and the width of 15cm at the upper end on the protective material obtained by mixing in the step S1 on the heat preservation in the step S3, wherein the lower end of the protective layer 7 is in contact with the heat preservation layer, and the top end of the protective layer 7 is aligned with the central line of the taphole hole;
s5, water vapor is not opened before the tapping machine starts to drill the iron notch, and the water vapor is opened completely when the drilling is carried out for 20 cm;
and (3) plugging operation: and (3) using a steel chisel to pry off large outside slag at an iron notch air inlet, and then blowing off the outer surface retaining wall by using compressed air (with the pressure of 0.6MPa) and then opening a hydraulic gun plugging port.
In comparison with example 3, the proportion of river sand in this comparative example is below the range of the present invention.
Comparative example 2 method for preventing slag bonding of blast furnace sludge sleeve
The method comprises the following steps:
s1, uniformly mixing river sand and coke powder according to a weight ratio of 30:1, and airing to obtain a protective material;
s2, cleaning the periphery of the mud sleeve 4: after the hydraulic gun is withdrawn, cleaning up sundries such as iron slag, stemming and the like around the taphole mud sleeve, and ensuring that the iron slag at the position 60cm in front of the mud sleeve is cleaned up;
cleaning the surface of the mud cover: after the hydraulic gun is withdrawn, cleaning the stemming adhered to the surface of the mud sleeve to ensure that the surface of the taphole is smooth, and if the surface of the mud sleeve is damaged, repairing and grinding the mud sleeve;
s3, paving a heat-insulating layer 5 with the height of 8cm and the width of 45cm on the periphery of the mud sleeve by using the split charging heat-insulating agent;
s4, paving a protective layer with the width of 35cm at the lower end and the width of 15cm at the upper end on the protective material obtained by mixing in the step S1 on the heat preservation in the step S3, wherein the lower end of the protective layer 7 is in contact with the heat preservation layer, and the top end of the protective layer 7 is aligned with the central line of the taphole hole;
s5, water vapor is not opened before the tapping machine starts to drill the iron notch, and the water vapor is opened completely when the drilling is carried out for 20 cm;
and (3) plugging operation: and (3) using a steel chisel to pry off large outside slag at an iron notch air inlet, and then blowing off the outer surface retaining wall by using compressed air (with the pressure of 0.6MPa) and then opening a hydraulic gun plugging port.
The river sand ratio of this comparative example is outside the scope of the invention compared to example 3.
Comparative example 3 method for preventing slag bonding of blast furnace sludge sleeve
The method comprises the following steps:
s1, airing river sand to obtain a protective material;
s2, cleaning the periphery of the mud sleeve 4: after the hydraulic gun is withdrawn, cleaning up sundries such as iron slag, stemming and the like around the taphole mud sleeve, and ensuring that the iron slag at the position 60cm in front of the mud sleeve is cleaned up;
cleaning the surface of the mud cover: after the hydraulic gun is withdrawn, cleaning the stemming adhered to the surface of the mud sleeve to ensure that the surface of the taphole is smooth, and if the surface of the mud sleeve is damaged, repairing and grinding the mud sleeve;
s3, paving a heat-insulating layer 5 with the height of 8cm and the width of 45cm on the periphery of the mud sleeve by using the split charging heat-insulating agent;
s4, paving a protective layer with the width of 35cm at the lower end and the width of 15cm at the upper end on the protective material obtained by mixing in the step S1 on the heat preservation in the step S3, wherein the lower end of the protective layer 7 is in contact with the heat preservation layer, and the top end of the protective layer 7 is aligned with the central line of the taphole hole;
s5, water vapor is not opened before the tapping machine starts to drill the iron notch, and the water vapor is opened completely when the drilling is carried out for 20 cm;
and (3) plugging operation: and (3) using a steel chisel to pry off large outside slag at an iron notch air inlet, and then blowing off the outer surface retaining wall by using compressed air (with the pressure of 0.6MPa) and then opening a hydraulic gun plugging port.
In comparison with example 3, this comparative example uses coke powder.
Comparative example 4 method for preventing slag bonding of blast furnace sludge sleeve
The method comprises the following steps:
s1, drying coke powder to obtain a protective material;
s2, cleaning the periphery of the mud sleeve 4: after the hydraulic gun is withdrawn, cleaning up sundries such as iron slag, stemming and the like around the taphole mud sleeve, and ensuring that the iron slag at the position 60cm in front of the mud sleeve is cleaned up;
cleaning the surface of the mud cover: after the hydraulic gun is withdrawn, cleaning the stemming adhered to the surface of the mud sleeve to ensure that the surface of the taphole is smooth, and if the surface of the mud sleeve is damaged, repairing and grinding the mud sleeve;
s3, paving a heat-insulating layer 5 with the height of 8cm and the width of 45cm on the periphery of the mud sleeve by using the split charging heat-insulating agent;
s4, paving a protective layer with the width of 35cm at the lower end and the width of 15cm at the upper end on the protective material obtained by mixing in the step S1 on the heat preservation in the step S3, wherein the lower end of the protective layer 7 is in contact with the heat preservation layer, and the top end of the protective layer 7 is aligned with the central line of the taphole hole;
s5, water vapor is not opened before the tapping machine starts to drill the iron notch, and the water vapor is opened completely when the drilling is carried out for 20 cm;
and (3) plugging operation: and (3) using a steel chisel to pry off large outside slag at an iron notch air inlet, and then blowing off the outer surface retaining wall by using compressed air (with the pressure of 0.6MPa) and then opening a hydraulic gun plugging port.
In contrast to example 3, no river sand was used in this comparative example.
Comparative example 5 method for preventing slag bonding of blast furnace sludge sleeve
The method comprises the following steps:
s1, airing river sand and coke powder according to a weight ratio of 9:1 to obtain a protective material;
s2, cleaning the periphery of the mud sleeve 4: after the hydraulic gun is withdrawn, cleaning up sundries such as iron slag, stemming and the like around the taphole mud sleeve, and ensuring that the iron slag at the position 60cm in front of the mud sleeve is cleaned up;
cleaning the surface of the mud cover: after the hydraulic gun is withdrawn, cleaning the stemming adhered to the surface of the mud sleeve to ensure that the surface of the taphole is smooth, and if the surface of the mud sleeve is damaged, repairing and grinding the mud sleeve;
s3, paving a heat-insulating layer 5 with the height of 8cm and the width of 45cm on the periphery of the mud sleeve by using the split charging heat-insulating agent;
s4, laying a first protective layer by river sand and laying a second protective layer by coke powder on the protective material obtained by mixing in the step S1 in the heat preservation of the step S3, wherein the first protective layer and the second protective layer are integrally a protective layer with the width of 35cm at the lower end and the width of 15cm at the upper end, the lower end of the protective layer 7 is in contact with the heat preservation layer, and the top end of the protective layer 7 is aligned with the central line of the taphole hole;
s5, water vapor is not opened before the tapping machine starts to drill the iron notch, and the water vapor is opened completely when the drilling is carried out for 20 cm;
and (3) plugging operation: and (3) using a steel chisel to pry off large outside slag at an iron notch air inlet, and then blowing off the outer surface retaining wall by using compressed air (with the pressure of 0.6MPa) and then opening a hydraulic gun plugging port.
In contrast to example 3, this comparative example did not mix river sand with coke breeze, and was laid first with river sand and then with coke breeze.
Comparative example 6 method for preventing slag bonding of blast furnace sludge sleeve
The method comprises the following steps:
s1, airing river sand and coke powder according to a weight ratio of 9:1 to obtain a protective material;
s2, cleaning the periphery of the mud sleeve 4: after the hydraulic gun is withdrawn, cleaning up sundries such as iron slag, stemming and the like around the taphole mud sleeve, and ensuring that the iron slag at the position 60cm in front of the mud sleeve is cleaned up;
cleaning the surface of the mud cover: after the hydraulic gun is withdrawn, cleaning the stemming adhered to the surface of the mud sleeve to ensure that the surface of the taphole is smooth, and if the surface of the mud sleeve is damaged, repairing and grinding the mud sleeve;
s3, paving a heat-insulating layer 5 with the height of 8cm and the width of 45cm on the periphery of the mud sleeve by using the split charging heat-insulating agent;
s4, laying a first protective layer by using coke powder and laying a second protective layer by using river sand on the protective material obtained by mixing in the step S1 in the heat preservation of the step S3, wherein the first protective layer and the second protective layer are integrally a protective layer with the width of 35cm at the lower end and the width of 15cm at the upper end, the lower end of the protective layer 7 is in contact with the heat preservation layer, and the top end of the protective layer 7 is aligned with the central line of the taphole hole;
s5, water vapor is not opened before the tapping machine starts to drill the iron notch, and the water vapor is opened completely when the drilling is carried out for 20 cm;
and (3) plugging operation: and (3) using a steel chisel to pry off large outside slag at an iron notch air inlet, and then blowing off the outer surface retaining wall by using compressed air (with the pressure of 0.6MPa) and then opening a hydraulic gun plugging port.
In contrast to example 3, this comparative example did not mix river sand with coke powder, and laid first with coke powder and then with river sand.
Examples of the experiments
The blast furnace sludge sleeves were treated according to the methods of the examples and comparative examples, and the service lives of the groups of sludge sleeves were compared. Specifically, the results are shown in Table 1.
TABLE 1 Life-table for mud sets
From the above table it can be seen that the mud casing treated by the method of the example has a significantly lower mud run out than the comparative example.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the protection scope of the present invention, although the present invention is described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions can be made on the technical solutions of the present invention without departing from the spirit and scope of the technical solutions of the present invention.
Claims (10)
1. The method for preventing the slag bonding of the blast furnace sludge sleeve is characterized by comprising the following steps of:
s1, uniformly mixing river sand and coke powder according to a weight ratio of (8-9) to (0.5-1.5), and airing to obtain a protective material;
s2, removing impurities on the surface of the mud sleeve, and repairing the damaged position of the surface of the mud sleeve;
s3, paving a heat preservation layer with the height of 3-15 cm and the width of 35-60 cm on the periphery of the mud sleeve by using the split charging heat preservation agent;
s4, paving a protective layer with the width of 25-45 cm at the lower end and the width of 5-25 cm at the upper end on the protective material obtained by mixing in the step S1 on the heat preservation in the step S3, wherein the lower end of the protective layer is in contact with the heat preservation layer, and the top end of the protective layer is level with the central line of the taphole hole;
s5, drilling an iron notch and then plugging the notch.
2. The method for preventing slag formation of a blast furnace sludge sheath as claimed in claim 1, wherein in the step S1, the weight ratio of the river sand to the coke powder is 9:1.
3. The method for preventing the slag bonding of the blast furnace sludge sleeve as claimed in claim 1, wherein in the step S2, impurities in the position 40-70 cm in front of the sludge sleeve are removed completely in the process of removing the impurities on the surface of the sludge sleeve.
4. The method for preventing slag bonding in a blast furnace sludge blanket as claimed in claim 1, wherein in step S2, the damaged portion of the sludge blanket film is repaired and the damaged portion of the sludge blanket surface is ground flat.
5. The method for preventing the slag bonding of the blast furnace sludge sheath as claimed in claim 1, wherein in the step S3, the height of the heat-insulating layer is 5-10 cm.
6. The method for preventing slag bonding in a blast furnace sludge sheath as claimed in claim 1, wherein in step S3, the width of the insulating layer is 40-50 cm.
7. The method for preventing slag accretion in a blast furnace sludge as claimed in claim 1, wherein in said step S4, said protective layer has a lower end width of 30-40 cm.
8. The method for preventing slag accretion in a blast furnace sludge as claimed in claim 1, wherein in said step S4, the width of the upper end of said discharged layer is 10 to 20 cm.
9. The method for preventing slag bonding of the blast furnace sludge sleeve as claimed in claim 1, wherein in the step S5, when the tapping machine starts to drill the tap hole during the process of drilling the tap hole, no water vapor is generated before the tapping machine drills the tap hole by 20 cm; and after drilling for 20cm, fully opening water vapor.
10. The method for preventing the slag bonding of the blast furnace sludge sleeve as claimed in claim 1, wherein in the step S5, in the operation of plugging, a taphole is used for blowing in, so as to pry off the large slag bonding outside the sludge sleeve, then the protective layer is blown off by compressed air with the pressure of 0.5-0.8 MPa, and the hydraulic gun is started to plug the opening.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115558731A (en) * | 2022-10-08 | 2023-01-03 | 北京首钢股份有限公司 | Device for preventing molten iron from pouring by mud gun under blast furnace main ditch accident state |
| CN115612763A (en) * | 2022-09-09 | 2023-01-17 | 重庆钢铁股份有限公司 | Operation method for maintaining depth of iron notch |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110643766A (en) * | 2019-04-11 | 2020-01-03 | 广东韶钢松山股份有限公司 | Blast furnace taphole mud sleeve safety detection and repair operation method |
| CN111876534A (en) * | 2020-06-22 | 2020-11-03 | 山西太钢不锈钢股份有限公司 | Method for reducing blast furnace tuyere and spray gun slag receiving |
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| CN115612763A (en) * | 2022-09-09 | 2023-01-17 | 重庆钢铁股份有限公司 | Operation method for maintaining depth of iron notch |
| CN115612763B (en) * | 2022-09-09 | 2023-11-28 | 重庆钢铁股份有限公司 | Operation method for maintaining depth of iron notch |
| CN115558731A (en) * | 2022-10-08 | 2023-01-03 | 北京首钢股份有限公司 | Device for preventing molten iron from pouring by mud gun under blast furnace main ditch accident state |
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| CN112899425B (en) | 2022-07-29 |
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