CN113108607A - Quick repairing process for lining of silicomanganese ore heating furnace with super furnace age - Google Patents
Quick repairing process for lining of silicomanganese ore heating furnace with super furnace age Download PDFInfo
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- CN113108607A CN113108607A CN202110404475.7A CN202110404475A CN113108607A CN 113108607 A CN113108607 A CN 113108607A CN 202110404475 A CN202110404475 A CN 202110404475A CN 113108607 A CN113108607 A CN 113108607A
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- 229910000720 Silicomanganese Inorganic materials 0.000 title claims abstract description 18
- 238000010438 heat treatment Methods 0.000 title claims abstract description 17
- 238000000034 method Methods 0.000 title claims description 35
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 56
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims abstract description 42
- 229910052799 carbon Inorganic materials 0.000 claims abstract description 42
- 239000011449 brick Substances 0.000 claims abstract description 31
- 229910052742 iron Inorganic materials 0.000 claims abstract description 28
- 239000002893 slag Substances 0.000 claims abstract description 25
- 238000004140 cleaning Methods 0.000 claims abstract description 17
- 230000008439 repair process Effects 0.000 claims abstract description 17
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 230000005540 biological transmission Effects 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims description 18
- 238000006073 displacement reaction Methods 0.000 claims description 13
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000000571 coke Substances 0.000 claims description 10
- 239000002245 particle Substances 0.000 claims description 8
- 238000010079 rubber tapping Methods 0.000 claims description 7
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000003723 Smelting Methods 0.000 claims description 5
- 238000009415 formwork Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 5
- 230000037431 insertion Effects 0.000 claims description 5
- 239000002023 wood Substances 0.000 claims description 4
- 238000007664 blowing Methods 0.000 claims description 3
- 239000004615 ingredient Substances 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims 1
- 230000000694 effects Effects 0.000 abstract description 3
- 229910001021 Ferroalloy Inorganic materials 0.000 abstract description 2
- 239000010410 layer Substances 0.000 description 11
- 229910000914 Mn alloy Inorganic materials 0.000 description 5
- PYLLWONICXJARP-UHFFFAOYSA-N manganese silicon Chemical compound [Si].[Mn] PYLLWONICXJARP-UHFFFAOYSA-N 0.000 description 3
- 230000000630 rising effect Effects 0.000 description 3
- 208000027418 Wounds and injury Diseases 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 239000010425 asbestos Substances 0.000 description 2
- 239000004927 clay Substances 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 208000014674 injury Diseases 0.000 description 2
- 230000007774 longterm Effects 0.000 description 2
- 238000007726 management method Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 229910052895 riebeckite Inorganic materials 0.000 description 2
- 238000007493 shaping process Methods 0.000 description 2
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- 229910000616 Ferromanganese Inorganic materials 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- DALUDRGQOYMVLD-UHFFFAOYSA-N iron manganese Chemical compound [Mn].[Fe] DALUDRGQOYMVLD-UHFFFAOYSA-N 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 239000011819 refractory material Substances 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D1/00—Casings; Linings; Walls; Roofs
- F27D1/16—Making or repairing linings increasing the durability of linings or breaking away linings
- F27D2001/1605—Repairing linings
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Vertical, Hearth, Or Arc Furnaces (AREA)
Abstract
The invention belongs to the technical field of ferroalloy production, relates to repair of a furnace lining of a silicomanganese ore heating furnace after the furnace lining is over-aged, and particularly relates to a rapid repair process of the furnace lining of the silicomanganese ore heating furnace with the over-aged furnace lining, which comprises the following steps: s1: preparing before stopping the furnace; s2: cleaning residual furnace burden and iron slag in the furnace; s3: the furnace lining is integrally molded and repaired, wherein cold ramming paste is used for replacing carbon bricks to repair the furnace lining, and the furnace lining is integrally knotted and molded; s4: preparing before power transmission; s5: the ignition furnace is started to recover production, the first furnace iron is organized within 5-7 days, and then the first furnace iron is gradually strengthened to be normal, so that the cost can be reduced, the time can be saved, the effect can be quickly achieved, and the problems in the prior art are solved.
Description
Technical Field
The invention belongs to the technical field of ferroalloy production, and relates to repair of a furnace lining of a silicomanganese ore heating furnace after the furnace lining is over-aged, in particular to a rapid repair process of the furnace lining of the silicomanganese ore heating furnace with the over-aged furnace lining.
Background
The silicon-manganese alloy is an alloy consisting of manganese, silicon, iron, a small amount of carbon and other elements, and is an iron alloy with wide application and high yield. The silicomanganese alloy is a compound deoxidizer commonly used in steel making and is also a reducing agent for producing medium-low carbon ferromanganese and producing metal manganese by an electro-silicothermic method.
The lining of the silicomanganese ore heating furnace comprises a furnace bottom, a furnace wall and a furnace eye, wherein the furnace bottom comprises a furnace bottom steel plate, an asbestos plate, a clay refractory grain elastic layer, a furnace bottom low-temperature rough joint paste leveling protective layer, furnace bottom refractory bricks and furnace bottom carbon bricks (the furnace bottom carbon bricks are divided into three layers, the thickness of each layer is 400mm, and the total thickness is 1200 mm); the furnace wall is composed of a furnace shell, an asbestos plate, a furnace wall fire clay light brick layer and ring carbon (the thickness of the ring carbon is 400 mm); the furnace eye is built by furnace eye carbon bricks.
The furnace lining masonry process for normal repair comprises the following steps: cleaning the accumulated materials and slag iron in the furnace, removing the original furnace wall ring carbon and furnace bottom carbon bricks, building three layers of carbon bricks at the furnace bottom after re-leveling, and building the furnace wall ring carbon. The method is suitable for the submerged arc furnace which needs to be produced for a long time after being repaired and simultaneously the matched system is synchronously updated, and benefits are created through long-term production. But for the ore-smelting furnace with part of furnace ages exceeding the furnace age, in order to meet the requirements of synchronous development and long-term planning, only the safe operation of the furnace body needs to be maintained after the furnace lining is repaired, long-time production is not needed after the furnace lining is repaired, the stable service life is within 2 years, and the repair of the furnace lining under the condition needs a repair process with short period, less investment and quick effect.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention aims to provide a rapid repair process for the furnace lining of the silicomanganese ore heating furnace with the super furnace age, which can reduce the cost, save the time, take effect rapidly and solve the problems in the prior art.
The technical scheme adopted by the invention is as follows:
the quick repairing process of the lining of the silicomanganese ore heating furnace with the super furnace age comprises the following steps:
s1: preparing before stopping the furnace;
s2: cleaning residual furnace burden and iron slag in the furnace;
s3: the furnace lining is integrally molded and repaired, wherein cold ramming paste is used for replacing carbon bricks to repair the furnace lining, and the furnace lining is integrally knotted and molded;
s4: preparing before power transmission;
s5: the ignition furnace is started to recover the production, the first furnace iron is organized for 5-7 days, and then the furnace iron is gradually strengthened to be normal.
The control electrode in preparation before stopping the furnace can create space for subsequent operation; the self-produced slag consumption of 50 kg/batch is increased one day before the furnace is shut down, so that the slag quantity is increased, and the slag iron in the furnace can be smoothly discharged and cleaned; the slag iron is discharged completely, so that the material accumulation and the slag iron participation in the furnace can be reduced, the cleaning time is effectively shortened, and conditions are created for quickly restoring the production; before furnace burden cleaning, the electrode is lifted to the upper limit, so that space can be created for furnace burden cleaning, the electrode is locked by a steel wire rope, and personnel injury caused by falling of the electrode is prevented; the cold ramming paste can be knotted after the carbon bricks are cleaned to be regular, and the knotting quality is mainly prevented from being reduced due to the fact that damaged carbon bricks are mixed between the cold ramming paste layer and the furnace bottom; the cold ramming paste is knotted after the bottom and the ring carbon formwork are supported, so that the cold ramming paste is connected into a whole and is in seamless connection, and the repairing quality is improved; a layer of refractory bricks is paved on the bottom of the furnace to mainly protect the cold ramming paste layer of the bottom of the furnace from being directly impacted by the electrode and damaged by arc light in the process of blowing in the furnace.
In a preferred step S1, the preparation before blowing out includes electrode control, batch adjustment and tapping management;
wherein the electrode controls: the electrodes are parked 2-3 days before the furnace is stopped, smelting is carried out through the lower insertion displacement, the electrode displacement is inserted downwards to about 650mm through the lower insertion displacement while the electrode pressure discharge amount is reduced, and the slag iron in the furnace can be discharged as completely as possible through tapping before the furnace is stopped;
adjusting ingredients: the self-produced slag consumption is increased by 50-80 kg/batch one day before the furnace is stopped, so that the slag iron in the furnace can be smoothly and completely discharged;
tapping management: and stopping the last furnace iron, naturally descending the charge level, simultaneously opening the two furnace eyes during tapping, and forming the eyes when the iron slag does not flow out any more.
Preferably, step S2 further includes locking the electrodes;
locking of the electrodes: after the furnace is stopped, the electrode displacement is lifted to the upper limit, so that a space can be created for cleaning furnace burden, the electrode is locked by a steel wire rope, and personnel injury caused by falling of the electrode is prevented;
cleaning residual furnace charge and iron slag in the furnace: the loose materials at the upper part are cleaned firstly, then the residual iron slag at the lower part is cleaned, and the burnt and broken carbon bricks are cleaned together in the cleaning process until the carbon bricks are arranged regularly.
Preferably, in the step S3, the furnace lining is integrally formed and repaired by knotting a layer of 200-500mm cold ramming paste on the bottom of the furnace based on the original regular carbon bricks, and then knotting and filling the ring carbon and the bottom mold with the cold ramming paste to connect the ring carbon and the bottom of the furnace into a whole.
The preferable material used by the furnace bottom formwork is a steel plate with the thickness of 4-5mm, the thickness of the cold ramming paste knotted by ring carbon is 80-100mm, the diameter of the hearth is prevented from being too small, the knotted thickness of the furnace bottom is consistent with the thickness of the original furnace bottom, and the depth of the original hearth is ensured.
Preferably, the bottom formwork is formed by connecting the bottom and the cold ramming paste knotted by the ring carbon into a whole and roasting at high temperature in the baking process to prevent seams.
In a preferable step S4, the preparation before power transmission is that after the furnace lining is integrally formed, a refractory brick is paved on the bottom of the furnace mainly for protecting the newly knotted furnace lining and preventing the furnace lining from being damaged by mechanical impact and arc light of the electrode in the process of opening the furnace, an opening ring is placed under the three-phase electrode, the lower electrode is placed in the opening ring to be seated, the opening ring is filled with large-particle coke of 50-100mm, the large-particle coke of 200-300 mm is paved on the bottom of the furnace, and a proper amount of wood is placed in the bottom of the furnace, so that the conductivity of the three-phase electrode and the uniformity of the temperature rise of the furnace are.
In a preferred step S1, the preparation before the furnace shutdown further includes that the material level of the furnace top bin does not exceed 2 batches during the material level reduction process; all materials in the furnace top material pipes are added into the furnace before the furnace is shut down, and no materials are allowed to be stored; and controlling the height of the paste column three days before stopping the furnace, reducing the height of the paste column by 200mm for each team, and finally controlling the height of the paste column to be about 2.5-3.0m without adding paste.
The invention has the beneficial effects that:
1. in the invention, under the normal masonry process, all materials in the furnace, including furnace bottom carbon bricks and ring carbon, need to be cleaned completely, the workload is large, the time consumption is long, generally about 10-15 days, after the furnace lining repairing process is optimized, the cleaning work can be completed within 5-8 days, the cleaning time is effectively shortened, and the cleaning cost investment is reduced.
2. The process realizes the rapid forming of the furnace lining after implementation, greatly reduces the repair time of the furnace lining, simultaneously, in the furnace baking process, the furnace lining which is knotted into a whole is roasted and formed along with stable rising, and various accidents caused by gaps existing in the newly repaired furnace lining are effectively avoided.
3. The process adopts cold ramming paste to form the brick by knotting, the price of the brick is between 50 and 70 percent of that of the carbon brick, and the refractory material cost for repairing the furnace lining is greatly reduced.
4. From digging to re-producing, the invention saves 10-15 days compared with the normal masonry process, reduces the labor cost in the process, also enables the submerged arc furnace to be re-produced in advance, increases the productivity and improves the overall benefit.
5. The method mainly reflects the requirement of on-demand repair, is suitable for the submerged arc furnace with short-term production and furnace life requirement compensation, and greatly improves the cost performance of submerged arc furnace repair.
Detailed Description
Example 1:
the process for smelting the common silicon-manganese alloy and rapidly converting the high-silicon-manganese alloy in the submerged arc furnace comprises the following steps of:
preparing before stopping the furnace, beginning to reduce the pressure discharge electrodes in the furnace 3 days before stopping the furnace, controlling by reducing the pressure discharge electrodes by 50 mm/shift from the normal temperature of 280 plus materials of 310 mm/shift, and simultaneously monitoring the temperature of the furnace bottom and the furnace body to prevent the local temperature of the furnace body from rising after the electrodes are short; when the electrode pressure is reduced, the electrode displacement is inserted downwards to 590mm through inserting the electrode displacement downwards, the self-produced slag consumption is increased by 55 kg/batch one day before furnace shutdown, and the smooth and complete discharge of iron slag in the furnace is ensured.
After the furnace is stopped, the displacement of the three-phase electrode is respectively lifted to the upper limit of 280mm, and the end of the three-phase electrode is locked with the large sleeve by a steel wire rope, so that the electrode is prevented from falling.
The furnace charge and iron slag are organized in the cleaning furnace, broken or half lost carbon bricks are removed together in the process until complete or regular carbon bricks are seen, and meanwhile, powder in the ring carbon gaps is cleaned.
The one deck cold ramming paste of knoing earlier makes level at the stove bottom after the clearance, adopts 4 mm's steel sheet to prop up the mould, and steel sheet is apart from ring carbon distance 80mm, adopts the cold ramming paste to tie a knot the shaping afterwards, and stove bottom thickness control 2000mm, furnace degree of depth 2800 mm.
After knotting, a layer of refractory bricks is laid on the bottom of the furnace, a ring (diameter 1800 mm) is placed under the three-phase electrode, the electrode is placed into the ring and is fixed, the ring is filled with 50-100mm large-particle coke, 280mm thick large-particle coke is laid on the bottom of the furnace, and a proper amount of wood is put in the coke.
Igniting and opening the furnace.
In the embodiment, the overall repair period is normally shortened by 10 days, various expenses are saved by 138 ten thousand yuan, the submerged arc furnace recovers production 10 days in advance, and the yield is increased by 613 tons.
Example 2:
the process for smelting the common silicon-manganese alloy and rapidly converting the high-silicon-manganese alloy in the submerged arc furnace comprises the following steps of:
preparing before stopping the furnace, beginning to reduce the pressure discharge electrodes in the furnace 3 days before stopping the furnace, controlling by reducing the pressure discharge electrodes by 60 mm/shift every shift from the normal 280 plus materials of 310 mm/shift, and simultaneously monitoring the temperature of the furnace bottom and the furnace body to prevent the local temperature of the furnace body from rising after the electrodes are short; when the electrode pressure and discharge amount is reduced, the electrode is inserted to 650mm through the displacement of the lower insertion electrode; the self-produced slag consumption is increased by 70 kg/batch one day before the furnace is stopped, so that the smooth and complete discharge of the iron slag in the furnace is ensured.
After the furnace is stopped, the displacement of the three-phase electrode is respectively lifted to the upper limit of 20mm, and the end of the three-phase electrode is locked with the large sleeve by a steel wire rope, so that the electrode is prevented from falling.
The furnace charge and iron slag are organized in the cleaning furnace, broken or half lost carbon bricks are removed together in the process until complete or regular carbon bricks are seen, and meanwhile, powder in the ring carbon gaps is cleaned.
The one deck cold ramming paste of knoing earlier makes level at the stove bottom after the clearance, adopts 5 mm's steel sheet to prop up the mould, and steel sheet is from ring carbon distance 100mm, adopts the cold ramming paste to tie a knot the shaping afterwards, and stove bottom thickness control 2000mm, furnace degree of depth 2800 mm.
After knotting, a layer of refractory bricks is laid on the bottom of the furnace, a ring (with the diameter of 1700 mm) is placed under the three-phase electrode, the electrode is placed into the ring and is completely seated, the ring is filled with 50-100mm large-particle coke, 300mm large-particle coke is laid on the bottom of the furnace, and a proper amount of wood is put in the coke.
Igniting and opening the furnace.
In the embodiment, the whole repair period is shortened by 12 days compared with the normal repair period, various expenses are saved by 150 ten thousand yuan, the submerged arc furnace recovers production 12 days in advance, and the yield is increased by 756 tons.
Claims (8)
1. The quick repairing process of the lining of the silicomanganese ore heating furnace with the super furnace age is characterized by comprising the following steps of:
s1: preparing before stopping the furnace;
s2: cleaning residual furnace burden and iron slag in the furnace;
s3: the furnace lining is integrally molded and repaired, wherein cold ramming paste is used for replacing carbon bricks to repair the furnace lining, and the furnace lining is integrally knotted and molded;
s4: preparing before power transmission;
s5: the ignition furnace is started to recover the production, the first furnace iron is organized for 5-7 days, and then the furnace iron is gradually strengthened to be normal.
2. The rapid repairing process for the lining of the silicomanganese ore heating furnace with the super-furnace age according to claim 1, which is characterized in that: in step S1, before blowing out, preparing for electrode control, ingredient adjustment and tapping management;
wherein the electrode controls: stopping the electrode 2-3 days before stopping the furnace, smelting by lower insertion displacement, reducing the pressure release amount of the electrode, and inserting the electrode displacement to about 500-650mm by lower insertion displacement;
adjusting ingredients: the self-produced slag consumption is increased by 50-80 kg/batch one day before the furnace is stopped;
tapping management: and stopping the last furnace iron, naturally descending the charge level, simultaneously opening the two furnace eyes during tapping, and forming the eyes when the iron slag does not flow out any more.
3. The rapid repairing process for the lining of the silicomanganese ore heating furnace with the super-furnace age according to claim 1, which is characterized in that: in step S2, locking the electrodes is further included;
locking of the electrodes: after stopping the furnace, lifting the displacement of the electrode to the upper limit and fixing;
cleaning residual furnace charge and iron slag in the furnace: the loose materials at the upper part are cleaned firstly, then the residual iron slag at the lower part is cleaned, and the burnt and broken carbon bricks are cleaned together in the cleaning process until the carbon bricks are arranged regularly.
4. The rapid repairing process for the lining of the silicomanganese ore heating furnace with the super-furnace age according to claim 3, characterized in that: the integrated forming and repairing of the furnace lining in the step S3 is to tie a layer of 200-plus-500 mm cold ramming paste at the furnace bottom on the basis of the original regular carbon bricks, and then to tie and fill a circle of ring carbon and a mold at the furnace bottom by using the cold ramming paste, so as to connect the ring carbon and the furnace bottom into a whole.
5. The rapid repairing process for the lining of the silicomanganese ore heating furnace with the super-furnace age according to claim 4, wherein the repairing process comprises the following steps: the bottom formwork is made of 4-5mm steel plates, the thickness of the cold ramming paste knotted by ring carbon is 80-100mm, and the knotted thickness of the bottom is consistent with the original thickness of the bottom.
6. The rapid repairing process for the lining of the silicomanganese ore heating furnace with the super-furnace age according to claim 5, wherein the repairing process comprises the following steps: the furnace bottom formwork needs to connect the furnace bottom and the cold ramming paste knotted by the ring carbon into a whole, and the mixture is baked and formed at high temperature in the furnace baking process.
7. The rapid repairing process for the lining of the silicomanganese ore heating furnace with the super-furnace age according to claim 1, which is characterized in that: in step S4, preparation before power transmission is that after the furnace lining is integrally formed, refractory bricks are flatly laid on the bottom of the furnace, a ring for opening the furnace is placed under a three-phase electrode, the electrode is placed down into the ring for opening the furnace to be seated, the ring for opening the furnace is filled with large-particle coke of 50-100mm, the large-particle coke of 200-300 mm is flatly laid on the bottom of the furnace, and a proper amount of wood is put in.
8. The rapid repairing process for the lining of the silicomanganese ore heating furnace with the super-furnace age according to claim 2, characterized in that: in the step S1, the preparation before the furnace shutdown further comprises that the material level of a furnace top bin does not exceed 2 batches in the process of reducing the material level; all materials in the furnace top material pipes are added into the furnace before the furnace is shut down, and no materials are allowed to be stored; and controlling the height of the paste column three days before stopping the furnace, reducing the height of the paste column by 200mm for each team, and finally controlling the height of the paste column to be about 2.5-3.0m without adding paste.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114659370A (en) * | 2022-03-24 | 2022-06-24 | 新疆西部合盛硅业有限公司 | Maintenance technology for hot furnace blowing-out furnace eye of industrial silicon ore hot furnace |
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| CN106524776A (en) * | 2016-10-19 | 2017-03-22 | 嘉峪关宏电铁合金有限责任公司 | Method for blowing out submerged arc furnace for long time to protect electrode |
| CN106435073A (en) * | 2016-11-11 | 2017-02-22 | 武汉宏程冶金材料有限公司 | Blast furnace liner overall pouring construction method for replacing spraying materials and refractory bricks |
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| CN109631588A (en) * | 2019-01-31 | 2019-04-16 | 王贵江 | A kind of method for maintaining of all-electric melting kiln |
| CN110653450A (en) * | 2019-08-01 | 2020-01-07 | 广东韶钢松山股份有限公司 | Online repairing method for converter body perforation |
| CN111947473A (en) * | 2020-07-06 | 2020-11-17 | 嘉峪关宏电铁合金有限责任公司 | Furnace body protecting method for submerged arc furnace |
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| CN114659370A (en) * | 2022-03-24 | 2022-06-24 | 新疆西部合盛硅业有限公司 | Maintenance technology for hot furnace blowing-out furnace eye of industrial silicon ore hot furnace |
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