CN116179792A - Rapid treatment method for converter flue and fume hood slag bonding - Google Patents
Rapid treatment method for converter flue and fume hood slag bonding Download PDFInfo
- Publication number
- CN116179792A CN116179792A CN202310059640.9A CN202310059640A CN116179792A CN 116179792 A CN116179792 A CN 116179792A CN 202310059640 A CN202310059640 A CN 202310059640A CN 116179792 A CN116179792 A CN 116179792A
- Authority
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- Prior art keywords
- converter
- slag
- hood
- nitrogen
- fume hood
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000002893 slag Substances 0.000 title claims abstract description 82
- 238000000034 method Methods 0.000 title claims abstract description 23
- 239000003517 fume Substances 0.000 title claims description 54
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 86
- 238000004140 cleaning Methods 0.000 claims abstract description 50
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 43
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 31
- 238000007664 blowing Methods 0.000 claims abstract description 27
- 238000004519 manufacturing process Methods 0.000 claims abstract description 14
- 238000009825 accumulation Methods 0.000 claims abstract description 10
- 238000001816 cooling Methods 0.000 claims abstract description 10
- 238000010926 purge Methods 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims description 10
- 238000003723 Smelting Methods 0.000 claims description 6
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 230000008602 contraction Effects 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 230000015572 biosynthetic process Effects 0.000 claims description 5
- 239000008400 supply water Substances 0.000 claims description 5
- 230000001154 acute effect Effects 0.000 claims description 3
- 230000002349 favourable effect Effects 0.000 claims description 3
- 230000005484 gravity Effects 0.000 claims description 3
- 239000002923 metal particle Substances 0.000 claims description 3
- 238000009991 scouring Methods 0.000 claims description 3
- 239000000779 smoke Substances 0.000 abstract description 14
- 239000002184 metal Substances 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 230000001595 contractor effect Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 206010010356 Congenital anomaly Diseases 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000001035 drying Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
- 238000010079 rubber tapping Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4693—Skull removal; Cleaning of the converter mouth
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21C—PROCESSING OF PIG-IRON, e.g. REFINING, MANUFACTURE OF WROUGHT-IRON OR STEEL; TREATMENT IN MOLTEN STATE OF FERROUS ALLOYS
- C21C5/00—Manufacture of carbon-steel, e.g. plain mild steel, medium carbon steel or cast steel or stainless steel
- C21C5/28—Manufacture of steel in the converter
- C21C5/42—Constructional features of converters
- C21C5/46—Details or accessories
- C21C5/4606—Lances or injectors
- C21C5/462—Means for handling, e.g. adjusting, changing, coupling
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses a quick treatment method for slagging of a converter flue and a smoke hood, which comprises the steps of firstly manufacturing a special cleaning gun, arranging a nozzle of the cleaning gun obliquely upwards, and shaking the converter to 50 ℃ behind the converter before water is supplied to the flue and the smoke hood; when slag accumulation occurs in the converter hood and the flue, continuously moving the cleaning gun up and down to realize water-cooling full coverage until the slag accumulation falls down; the method comprises the steps of opening high-pressure nitrogen to destroy and purge the foundation of the accumulated slag while forcibly cooling the accumulated slag in the converter hood through a cleaning gun, continuously blowing nitrogen for 5-10 min, continuously moving the position of the cleaning gun in the converter hood while blowing nitrogen until the residual accumulated slag is peeled off from the converter hood, enabling the nitrogen flow to be 75-100% of the normal splashing slag nitrogen blowing flow, adjusting the gun position of the converter hood cleaning gun to be 12800-13800 mm, shaking the converter to 45 degrees during nitrogen blowing, changing the cleaning gun into a water supply state after the nitrogen blowing is finished, and shaking the converter to 50 degrees after the converter hood is finished until the accumulated slag of the converter hood is cleaned.
Description
Technical Field
The invention relates to a quick treatment method for converter flue and fume hood slagging.
Background
In the metallurgical industry, a great amount of flue gas is generated in the normal smelting process of a converter, and the flue gas of the converter must be recycled in order to ensure that the environment and the atmosphere are not polluted and save energy. The fume hood and the flue are recovery channels of the converter fume, and the smooth and normal operation of the channels determines whether the converter can perform normal production activities, so the fume hood and the flue are significant for the converter. The converter fume hood is formed by welding a plurality of intercommunicated water pipes side by side, and belongs to water cooling equipment, wherein the wall thickness of the water cooling pipes is 5mm. The converter fume hood and flue slag accumulation are phenomena that when metal splashes or slag is returned to dry in the blowing process due to the excessively small converter volume ratio, a mixture of metal liquid drops and slag is adhered and stuck on the fume hood and the inner periphery of the flue through the suction of a fan. The thickness of the deposited slag is in direct proportion to the metal splashing degree or the slag 'back drying' degree, and the thickness can reach 600mm-1000mm when the deposited slag is serious. When slag accumulation of a converter hood is serious, a plurality of adverse effects can be caused for smelting production of the converter: (1) The inner diameter of the converter smoke hood is reduced, so that the smoke recycling and dust removing effects in the converting process are affected, and the smoke at the furnace mouth is turned over. (2) The blockage of a blanking opening of slag-making auxiliary materials is easy to cause severe gun formation and unsmooth blanking. (3) When the converter is used for replacing a tapping hole or pouring out steel, accumulated slag of the smoke hood is easy to fall off due to expansion with heat and contraction with cold, so that personal safety of operators is endangered. (4) Large-area fume hood slag accumulation and falling off can damage facilities such as oxygen guns, steel slag car cables, rails and the like. Can be said to be bad without benefit.
Because the water-cooling pipe wall of the converter fume hood is thinner, the conventional method for cleaning the accumulated slag of the converter fume hood in the prior art is that personnel enter the interior of the flue from the top end of the flue to manually clean the flue, and because the interior of the flue belongs to limited space operation, the safety risk is very high, the treatment time is longer, and the general treatment time is 40-70 hours. The invention changes the prior treatment method and mode from the perspective of safety and high efficiency, and effectively solves the difficult problem of cleaning the slagging of the flue and the smoke hood.
At present, a system is not available, and a cleaning method after efficient and labor-saving fume hood and flue slagging is effectively consulted, and how to control the occurrence of splashing is more, but in order to completely control all splashing, before the current process conditions are not improved significantly, various splashing cannot be completely eliminated, and the fume hood and flue slagging still are problems to be faced, and a specific implementation method is not found in related documents and no related auxiliary equipment are described for the cleaning method.
Disclosure of Invention
The invention aims to provide a rapid treatment method for slagging of a converter flue and a smoke hood, which can reduce the safety risk to the greatest extent, treat the slagging problem of the flue and the smoke hood in a short time and reduce the influence on the production link and the environmental protection of a steelmaking process.
The technical scheme adopted by the invention is that the quick treatment method for slagging of the converter flue and the smoke hood is implemented according to the following steps:
(1) Firstly, manufacturing a special cleaning gun, wherein the cleaning gun comprises a vertical pipe, the lower end of the vertical pipe is closed, nozzles are uniformly arranged on a circumferential surface pipe body at the lower part of the vertical pipe at intervals, and the nozzles are obliquely upwards arranged and form an acute angle with the central line of the vertical pipe; before the flue and the fume hood supply water, the converter is rocked to 50 ℃ behind the converter;
(2) When slag accumulation occurs in the converter hood and the flue, the manufactured cleaning gun is quickly replaced to supply water to the slag bonding part in the converter hood to generate thermal expansion and cold contraction reaction, water is continuously supplied for 15-20 min, and the cleaning gun is continuously moved up and down to realize water cooling full coverage until the slag accumulation falls down while water is supplied; when water is supplied, as the fume hood slag is in a high-temperature state after the converter smelting is finished, the continuous water supply function of the converter fume hood cleaning gun is utilized in a certain height and a short time, and the water jet and the high-temperature metal particles in the fume hood slag are alternately cooled and heated, so that the fume hood slag is melted and falls off under the action of gravity;
(3) The method comprises the steps of (1) opening high-pressure nitrogen to destroy and purge the accumulated slag in the converter hood while forcibly cooling the accumulated slag in the converter hood through a cleaning gun, continuously blowing nitrogen for 5-10 min, continuously moving the position of the cleaning gun in the converter hood while blowing nitrogen until the residual accumulated slag is peeled off from the converter hood, wherein the nitrogen flow is 75-100% of the normal splashing slag nitrogen blowing flow, adjusting the gun position of the converter hood cleaning gun to 12800-13800 mm, and shaking the converter to 45 ℃ during nitrogen blowing, so that the direction of the nitrogen jet is changed after the supersonic nitrogen jet meets the furnace shell, the effect of backflushing the accumulated slag of the converter hood is achieved, and no damage is caused to the hood;
(4) After nitrogen blowing is finished, part of residual slag is still in a high-temperature state, at the moment, the converter fume hood cleaning gun is changed into a water supply state, the converter is simultaneously rocked to 50 ℃ behind the converter, the water supply is utilized to forcedly cool the Wen Ji slag with the residual height of the fume hood part, and the high-temperature slag is favorable for the fume hood slag stripping due to the heat expansion and cold contraction effect and the scouring effect of supersonic nitrogen jet flow.
(5) Repeating the above operation, rapidly and thoroughly cleaning the accumulated slag of the fume hood, and recovering the normal production state until the accumulated slag of the fume hood of the converter is cleaned;
(6) In order to prevent the slag formation from being aggravated, after the normal converting of the converter is finished, the converter oxygen lance is used for blowing nitrogen to clean the fume hood, and after the nitrogen blowing is finished, the accumulated slag cleaning work of the converter fume hood is completed.
Aiming at the existing technological conditions and current situations, a labor-saving mode cleaning mode is established by means of the congenital conditions of equipment and facilities, and personnel do not need to enter the flue to perform cleaning activities while the flue and the smoke hood are not damaged in the operation process. The operation method and the tool are simple to operate, can rapidly cool the accumulated slag of the converter smoke hood, realize a treatment mode without personnel participation by utilizing the principles of thermal expansion and cold contraction and free falling, enable the converter smoke hood to fall freely, achieve the aim of safely, effectively and rapidly cleaning the accumulated slag, and furthest eliminate the safety risk, the environmental protection risk and the production loss. The invention starts from production practice, the converter fume hood cleaning gun is formed by reforming a normal converting oxygen gun, and gun bodies, gas and water sources are all necessary for smelting an oxygen gun system. When metal splash or slag is generated in the blowing process of the converter and slag is accumulated in a converter hood, the cleaning method disclosed by the invention can be used for safely, efficiently, time-saving, labor-saving, fast and effectively carrying out flue slag-bonding treatment, thoroughly solving the safety risk of the original cleaning mode, obviously improving the production operation rate of the converter, being popularized and applied in the field of converter steelmaking production and having remarkable effect.
Drawings
FIG. 1 is a diagram of the operation of the cleaning gun used in the present invention.
Description of the embodiments
A method for rapidly treating slag in a converter flue and a fume hood is implemented according to the following steps:
(1) Firstly, manufacturing a special cleaning gun, as shown in fig. 1, wherein the cleaning gun comprises a vertical pipe 1, the lower end of the vertical pipe 1 is closed, nozzles 2 are uniformly arranged on the circumferential surface pipe body at the lower part of the vertical pipe 1 at intervals, and the nozzles are obliquely upwards arranged and form an acute angle with the central line of the vertical pipe; before the flue and the fume hood supply water, the converter is rocked to about 50 ℃ behind the converter, so that cooling water is prevented from entering the converter, and other losses are caused.
(2) When slag accumulation occurs in the converter hood 3 and the flue, the special cleaning gun is quickly replaced, water is supplied to the slag-bonding part in the converter hood to generate thermal expansion and cold contraction reaction, and water is continuously supplied for 15-20 min. And when water is supplied, the position of the cleaning gun in the converter fume hood is continuously moved, so that water-cooling full coverage is realized until accumulated slag falls down. When water is supplied, because the fume hood accumulated slag is in a high-temperature state after the smelting of the converter 4 is finished, the continuous water supply function of the converter fume hood cleaning gun in a certain height and a short time is utilized, and the water jet and the high-temperature metal particles in the fume hood accumulated slag are alternately cooled and heated, so that the fume hood accumulated slag is melted and falls off under the action of self gravity.
(3) And (3) when the slag deposit inside the converter hood is cooled by forced water through a special cleaning gun, starting high-pressure nitrogen to destroy and purge the slag deposit, continuously blowing nitrogen for 5-10 min, and continuously moving the position of the cleaning gun inside the converter hood when blowing nitrogen until the residual slag deposit is peeled off from the converter hood. The nitrogen flow is 75-100% of the normal slag splashing nitrogen blowing flow opening, and the adjusting gun position of the converter hood cleaning gun is 12800-13800 mm. When nitrogen is blown, the converter is rocked to 45 degrees, so that the direction of the nitrogen jet is changed after the supersonic nitrogen jet meets the furnace shell, the effect of backflushing the accumulated slag of the fume hood of the converter is achieved, and no damage is caused to the fume hood.
(4) After nitrogen blowing is finished, part of residual slag is still in a high-temperature state, at the moment, the converter fume hood cleaning gun is changed into a water supply state, the converter is simultaneously rocked to 50 ℃ behind the converter, the water supply is utilized to forcedly cool the Wen Ji slag with the residual height of the fume hood part, and the high-temperature slag is favorable for the fume hood slag stripping due to the heat expansion and cold contraction effect and the scouring effect of supersonic nitrogen jet flow.
(5) The operation is repeated, so that the accumulated slag of the smoke hood can be quickly and thoroughly cleaned, and the normal production state is recovered. If the converter hood is excessively accumulated, the technical scheme can be carried out for a long time until the accumulated slag of the converter hood is cleaned.
(6) In order to prevent the slag formation from being aggravated, after the normal converting of the converter is finished, the converter oxygen lance is used for blowing nitrogen to clean the fume hood, and after the nitrogen blowing is finished, the accumulated slag cleaning work of the converter fume hood is completed.
Claims (1)
1. A method for rapidly treating slag formation of a converter flue and a fume hood is characterized by comprising the following steps:
1) Firstly, manufacturing a special cleaning gun, wherein the cleaning gun comprises a vertical pipe, the lower end of the vertical pipe is closed, nozzles are uniformly arranged on a circumferential surface pipe body at the lower part of the vertical pipe at intervals, and the nozzles are obliquely upwards arranged and form an acute angle with the central line of the vertical pipe; before the flue and the fume hood supply water, the converter is rocked to 50 ℃ behind the converter;
2) When slag accumulation occurs in the converter hood and the flue, the manufactured cleaning gun is quickly replaced to supply water to the slag bonding part in the converter hood to generate thermal expansion and cold contraction reaction, water is continuously supplied for 15-20 min, and the cleaning gun is continuously moved up and down to realize water cooling full coverage until the slag accumulation falls down while water is supplied; when water is supplied, as the fume hood slag is in a high-temperature state after the converter smelting is finished, the continuous water supply function of the converter fume hood cleaning gun is utilized in a certain height and a short time, and the water jet and the high-temperature metal particles in the fume hood slag are alternately cooled and heated, so that the fume hood slag is melted and falls off under the action of gravity;
3) The method comprises the steps of (1) opening high-pressure nitrogen to destroy and purge the accumulated slag in the converter hood while forcibly cooling the accumulated slag in the converter hood through a cleaning gun, continuously blowing nitrogen for 5-10 min, continuously moving the position of the cleaning gun in the converter hood while blowing nitrogen until the residual accumulated slag is peeled off from the converter hood, wherein the nitrogen flow is 75-100% of the normal splashing slag nitrogen blowing flow, adjusting the gun position of the converter hood cleaning gun to 12800-13800 mm, and shaking the converter to 45 ℃ during nitrogen blowing, so that the direction of the nitrogen jet is changed after the supersonic nitrogen jet meets the furnace shell, the effect of backflushing the accumulated slag of the converter hood is achieved, and no damage is caused to the hood;
4) After nitrogen blowing is finished, part of residual slag is still in a high-temperature state, at the moment, the converter fume hood cleaning gun is changed into a water supply state, the converter is simultaneously rocked to 50 ℃ behind the converter, the water supply is utilized to forcedly cool Wen Ji slag with the residual height of the fume hood part, and the high-temperature slag is favorable for the fume hood slag stripping due to the action of thermal expansion and contraction and the scouring action of supersonic nitrogen jet flow;
5) Repeating the above operation, rapidly and thoroughly cleaning the accumulated slag of the fume hood, and recovering the normal production state until the accumulated slag of the fume hood of the converter is cleaned;
6) In order to prevent the slag formation from being aggravated, after the normal converting of the converter is finished, the converter oxygen lance is used for blowing nitrogen to clean the fume hood, and after the nitrogen blowing is finished, the accumulated slag cleaning work of the converter fume hood is completed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310059640.9A CN116179792B (en) | 2023-01-20 | 2023-01-20 | Rapid treatment method for converter flue and fume hood slag bonding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202310059640.9A CN116179792B (en) | 2023-01-20 | 2023-01-20 | Rapid treatment method for converter flue and fume hood slag bonding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN116179792A true CN116179792A (en) | 2023-05-30 |
| CN116179792B CN116179792B (en) | 2023-12-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202310059640.9A Active CN116179792B (en) | 2023-01-20 | 2023-01-20 | Rapid treatment method for converter flue and fume hood slag bonding |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN116179792B (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5865876A (en) * | 1995-06-07 | 1999-02-02 | Ltv Steel Company, Inc. | Multipurpose lance |
| JPH11350015A (en) * | 1998-06-04 | 1999-12-21 | Kawasaki Heavy Ind Ltd | Lance for removing skull |
| CN203947122U (en) * | 2014-05-04 | 2014-11-19 | 河北钢铁股份有限公司承德分公司 | A kind of converter flue is stained with slag cleaning device |
| CN205635674U (en) * | 2016-04-01 | 2016-10-12 | 广东韶钢工程技术有限公司 | Portable petticoat pipe residue beating platform of converter |
| CN207159264U (en) * | 2017-08-04 | 2018-03-30 | 新疆八一钢铁股份有限公司 | A kind of specific purpose tool for clearing up nitrogen seal ring air holes |
| CN108344307A (en) * | 2018-03-20 | 2018-07-31 | 马鞍山钢铁股份有限公司 | A kind of revolving furnace fume hood accumulated slag method for cleaning and revolving furnace fume hood accumulated slag clear up rifle |
| CN111926143A (en) * | 2020-07-10 | 2020-11-13 | 河北敬业中厚板有限公司 | Converter smoke hood accumulated slag cleaning gun and cleaning method thereof |
| CN113755665A (en) * | 2021-09-10 | 2021-12-07 | 广东韶钢松山股份有限公司 | Slag removal method for converter smoke hood |
-
2023
- 2023-01-20 CN CN202310059640.9A patent/CN116179792B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5865876A (en) * | 1995-06-07 | 1999-02-02 | Ltv Steel Company, Inc. | Multipurpose lance |
| JPH11350015A (en) * | 1998-06-04 | 1999-12-21 | Kawasaki Heavy Ind Ltd | Lance for removing skull |
| CN203947122U (en) * | 2014-05-04 | 2014-11-19 | 河北钢铁股份有限公司承德分公司 | A kind of converter flue is stained with slag cleaning device |
| CN205635674U (en) * | 2016-04-01 | 2016-10-12 | 广东韶钢工程技术有限公司 | Portable petticoat pipe residue beating platform of converter |
| CN207159264U (en) * | 2017-08-04 | 2018-03-30 | 新疆八一钢铁股份有限公司 | A kind of specific purpose tool for clearing up nitrogen seal ring air holes |
| CN108344307A (en) * | 2018-03-20 | 2018-07-31 | 马鞍山钢铁股份有限公司 | A kind of revolving furnace fume hood accumulated slag method for cleaning and revolving furnace fume hood accumulated slag clear up rifle |
| CN111926143A (en) * | 2020-07-10 | 2020-11-13 | 河北敬业中厚板有限公司 | Converter smoke hood accumulated slag cleaning gun and cleaning method thereof |
| CN113755665A (en) * | 2021-09-10 | 2021-12-07 | 广东韶钢松山股份有限公司 | Slag removal method for converter smoke hood |
Non-Patent Citations (1)
| Title |
|---|
| 欧阳德刚;宋中华;: "转炉炉口粘渣清理技术现状与发展方向", 工业加热, no. 03 * |
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| Publication number | Publication date |
|---|---|
| CN116179792B (en) | 2023-12-22 |
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