CN106319118A - Method for prolonging service life of blast furnace copper cooling wall - Google Patents
Method for prolonging service life of blast furnace copper cooling wall Download PDFInfo
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- CN106319118A CN106319118A CN201510337015.1A CN201510337015A CN106319118A CN 106319118 A CN106319118 A CN 106319118A CN 201510337015 A CN201510337015 A CN 201510337015A CN 106319118 A CN106319118 A CN 106319118A
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- blast furnace
- copper cooling
- cooling wall
- slag crust
- stave
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- 238000001816 cooling Methods 0.000 title claims abstract description 130
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 title claims abstract description 110
- 229910052802 copper Inorganic materials 0.000 title claims abstract description 110
- 239000010949 copper Substances 0.000 title claims abstract description 110
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000002893 slag Substances 0.000 claims abstract description 49
- 239000002826 coolant Substances 0.000 claims abstract description 14
- 238000004364 calculation method Methods 0.000 claims abstract description 7
- 238000009423 ventilation Methods 0.000 claims abstract description 6
- 238000012546 transfer Methods 0.000 claims description 10
- 239000007788 liquid Substances 0.000 claims description 9
- 239000003507 refrigerant Substances 0.000 claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 9
- 238000001914 filtration Methods 0.000 claims description 3
- 238000002309 gasification Methods 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 3
- 238000005057 refrigeration Methods 0.000 claims description 3
- 239000008234 soft water Substances 0.000 claims description 3
- 230000006835 compression Effects 0.000 claims description 2
- 238000007906 compression Methods 0.000 claims description 2
- 230000007774 longterm Effects 0.000 abstract description 2
- 230000002159 abnormal effect Effects 0.000 abstract 1
- 230000017525 heat dissipation Effects 0.000 abstract 1
- 238000000746 purification Methods 0.000 abstract 1
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 9
- 239000000498 cooling water Substances 0.000 description 6
- 238000012544 monitoring process Methods 0.000 description 5
- 238000001514 detection method Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 4
- 229910001018 Cast iron Inorganic materials 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000005265 energy consumption Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 239000010959 steel Substances 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
- 238000013528 artificial neural network Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 239000011737 fluorine Substances 0.000 description 1
- 229910052731 fluorine Inorganic materials 0.000 description 1
- JEGUKCSWCFPDGT-UHFFFAOYSA-N h2o hydrate Chemical compound O.O JEGUKCSWCFPDGT-UHFFFAOYSA-N 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000011241 protective layer Substances 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- 230000005619 thermoelectricity Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Blast Furnaces (AREA)
Abstract
The invention discloses a method for prolonging the service life of a copper cooling wall of a blast furnace, which is used for effectively protecting the copper cooling wall of the blast furnace. The method comprises the following steps: the hot surface temperature of the copper cooling wall of the blast furnace can be obtained by the hot surface temperature calculation system; the system for judging the thickness of the slag crust on the hot surface of the copper cooling wall of the blast furnace can judge whether the slag crust with a certain thickness needs to be quickly established to protect the copper cooling wall; the blast furnace copper cooling wall refrigerating system forcibly cools the blast furnace copper cooling wall needing to be protected, so that the hot surface of the copper cooling wall is quickly provided with effective slag crust; and the ventilation and purification device and the control system are responsible for completing the ventilation and heat dissipation of the whole system and the liquefaction circulation process of the cooling medium. Compared with the prior art, the invention relieves the contradiction that the copper cooling wall of the blast furnace is quick to damage and is not easy to replace in the past, and further improves the first-generation furnace service of the blast furnace. Moreover, the invention can reduce the temperature fluctuation of the blast furnace hearth caused by the abnormal falling of the slag skin of the copper cooling wall of the blast furnace and ensure the long-term stable and smooth running of the blast furnace.
Description
Technical field
The present invention relates to prolonging campaign technology, a kind of method extending blast furnace copper cooling stave service life,
Belong to field of metallurgy.
Background technology
Blast furnace process energy consumption accounts for the 60% of steel and iron industry total energy consumption, is the energy consumption rich and influential family of steel and iron industry, and it is energy-conservation
Potentiation has a high potential.Blast furnace produces from the smelting of the investment construction of early stage to later stage, then repaiies, greatly in period
Repairing, blast furnace maintenance investment is huge.The most domestic and international each iron and steel enterprise is all by improving the usage factor of blast furnace, strong
Change the means such as smelting and excavate the potentiality of blast furnace so that the maximizing the benefits of blast furnace, but the most unavoidably increase
The burden of blast furnace high thermal load regions, even can make be substantially reduced the service life of blast furnace, how to give full play to
It is pendulum a difficult problem in face of iron industry that the production capacity of blast furnace does not the most reduce the life-span of blast furnace.With regard to high furnace superintendent
For longevity, main restricted link is in blast furnace high thermal load regions, including under bosh, furnace bosh and shaft
Region, portion.Original cast-iron cooling wall is extremely difficult to these efficient, long-lived targets above-mentioned.Repeatedly industrialness examination
Test and show: copper cooling wall using effect on blast furnace is very good.Therefore, at restoration of lower stack furnace bosh and bosh
High thermal load regions modern blast furnace commonly used copper cooling wall cooling technology.Many blast furnaces in the world over nearly 10 years
Employ copper cooling wall, it may be said that the life-span of cooling wall directly decides the service life of blast furnace.According to copper material
Requiring its hot-face temperature less than 230 DEG C, copper cooling wall hot side needs one layer of slag crust protective layer, and thickness of the slag crust is fitted
When and to stablize, it is possible to reduce copper cooling wall region heat loss and keep the reasonable operation type of furnace.Owing to the modern times are big
Type blast furnace uses " high utilization factor, low coke ratio, big coal injection, long-life " operation policy, when injecting coal quantity is close
After 180kg/t, bosh, furnace bosh, restoration of lower stack become extreme high heat load area, are in cohesive zone formation range
In, to be washed away by high temperature and high speed Gas Flow, heat flow rate per unit area is big, and variations in temperature is big, and copper cooling wall hot side slag crust holds
Easy to fall off, and be the evil shaken of a high temperature, high pressure, highly corrosive, high heat near blast furnace copper cooling stave hot side
Bad region, without good slag crust protection, will have a greatly reduced quality the service life of copper cooling wall, and then not
The requirement that modern big blast furnace is kept the safety in production continuously can be met.
Patent " intelligent monitoring method for cooling wall of blast furnace " (publication number CN 101319256A, publication date 2008
On December 10) in text, application is blast-furnace cast iron cooling wall, uses nonlinear regression mode to refine
Go out the kernel model that conducts heat, draw the inspection of cooling wall hot side maximum temperature value in conjunction with kernel model and artificial neural network
Surveying model and form monitoring of software, the problem mainly solved is the duty of monitoring cast-iron cooling wall, it is ensured that casting
The safety of ferrum cooling wall, does not relate to the monitoring of blast furnace copper cooling stave and blast furnace profile.
Patent " a kind of method measuring blast furnace lining " (publication number CN 101275829A, publication date 2008
On October 1) in text, the method extrapolating blast furnace crucible corrosion thickness by the data of thermocouple detection,
Implementing region is bottom house cupola well region, is not directed to thickness of the slag crust and blast furnace in the stove of blast furnace high heat load area
The monitoring of inner mold.
Summary of the invention
The present invention precisely in order to solve the deficiency mentioned in background technology, consider blast furnace copper cooling stave feature and
The reality of blast furnace operating, designs a kind of method extending blast furnace copper cooling stave service life, alleviates in the past
Blast furnace copper cooling stave is damaged very fast and the most easily changeable contradiction.Use the method can be the most thinning at basque
Containment vessel is set up in region, thus plays and slow down the effect that blast-furnace shaft corrodes and improves the life of the blast furnace.
The present invention designs a kind of method extending blast furnace copper cooling stave service life, comprises the steps of
1, blast furnace copper cooling stave hot-face temperature calculates system, according to blast furnace copper cooling stave version, thermocouple
Installation site and quantity, blast furnace copper cooling stave methods for cooling, use blast furnace copper cooling stave Calculation of Heat Transfer model to count
Calculate blast furnace copper cooling stave hot-face temperature；
2, blast furnace copper cooling stave hot side thickness of the slag crust judges system, according to blast furnace copper cooling stave Calculation of Heat Transfer model
The slag crust of the COMPREHENSIVE CALCULATING blast furnace copper cooling stave hot sides such as the blast furnace hot-face temperature calculated and slag crust heat conductivity remains
Remaining thickness, is then allowed minimal thickness by the rational slag crust of furnace volume and structure choice, determines that blast furnace copper cools down
Wall hot side thickness of the slag crust is the thinnest to come off to less than the minimal thickness or be complete allowed, determine be
No needs set up rapidly certain thickness slag crust to protect copper cooling wall；
3, blast furnace copper cooling stave refrigeration system, when the thickness of the slag crust of copper cooling wall hot side is less than the thin and thick allowed
The quickly cooling medium that cooling medium is switched to including liquid freon rapidly by degree by demineralized water or soft water, with
The Quick-gasifying of the cold-producing mediums such as liquid freon, force cooling to need blast furnace copper cooling stave to be protected, make blast furnace
Copper cooling wall hot side sets up rapidly the protection of effective slag crust；
4, ventilating and purifier and control system, ventilation and heat and the cooling of being responsible for whole system are situated between
The liquefaction cycles of matter, can make the cold-producing medium of gasification in copper cooling wall cooling line liquefy rapidly.Compression
Machine, by the gaseous refrigerant of the gaseous refrigerant boil down to High Temperature High Pressure in copper cooling wall, is then delivered to condenser and dissipates
The liquid refrigerant becoming normal temperature high voltage after heat is re-circulated in copper cooling wall use after filtering；
5, step 1, step 2 are repeated, if copper cooling wall hot side thickness of the slag crust meets protection copper cooling wall
Low requirement, stops performing step 3, step 4 simultaneously, with switching back to original coolant by cooling medium, high
Stove copper cooling wall recovers normal cooling and operation.
The present invention has following characteristics and a beneficial effect:
1) alleviate that conventional blast furnace copper cooling stave is damaged very fast and the most easily changeable contradiction.Use the method is permissible
Quickly set up containment vessel in basque weakened region, thus play and slow down blast-furnace shaft erosion and improve the blast furnace longevity
The effect of life.
2) exception reducing blast furnace copper cooling stave slag crust comes off, and slag crust comes off the blast furnace crucibe temperature brought
Fluctuation, has ensured blast furnace direct motion steady in a long-term.
Detailed description of the invention
Below in conjunction with specific embodiment the present invention is described:
With certain 3200m domestic3As a example by blast furnace, use this method to blast furnace copper cooling stave implement protection, comprise with
Lower step:
1, blast furnace copper cooling stave hot-face temperature calculates system, according to blast furnace copper cooling stave version, thermocouple
Installation site and quantity, blast furnace copper cooling stave methods for cooling etc., use blast furnace copper cooling stave Calculation of Heat Transfer model
Calculate blast furnace copper cooling stave hot-face temperature.
Blast furnace copper cooling stave physical arrangement is as follows, length 1800～3200mm, thickness 125mm, and hot side is processed
Multiple dovetail grooves, for stablizing carbon brick, dovetail groove spacing 104mm, depth of dovetail 35mm, dovetail groove width
Degree 50mm, processes dovetail groove, and every piece has 4 passage Ф 50mm water service pipes, and water flow velocity is stable at 2.0m/s, cold
But water inlet temperature, outlet temperature are provided with galvanic couple on-line checking.One piece of copper cooling wall has 2 galvanic couple detection temperature
Change, wall body detection galvanic couple gos deep into wall body half (x1=47.5mm).The rib detection galvanic couple degree of depth is the deepest
(x2=90.5).Obtaining cooling water outlet and inlet temperature, test point electric thermo-couple temperature, copper cooling wall physical arrangement
Under parameter premise, it is possible to calculate copper cooling wall hot-face temperature according to 2 dimension heat transfer models.
The heat transfer of monoblock cooling wall can be divided into two parts, a part is rib, it is believed that material is single；Another
Part is copper and refractory composition.Heat flow rate per unit area q of monoblock cooling wall can utilize cooling water parameter to calculate:
In formula: q is the heat flow rate per unit area of monoblock cooling wall, kW/m2；C is cooling water specific heat capacity, kJ/ (kg DEG C)；m
For unit time inner cooling water flow, kg/s；toFor cooling down water leaving water temperature, DEG C；tiFor cooling water water inlet temperature
Degree, DEG C；F is copper cooling wall surface area,.
Rib heat flow rate per unit area q1Calculate such as:
In formula: q1For rib heat flow rate per unit area, kW/m2；λ is copper cooling wall heat conductivity, W/ (m DEG C)；tx2For
Copper cooling wall hot-face temperature, DEG C；t2For inserting the temperature value of rib thermocouple, DEG C；Δx2For hot side and thermoelectricity
Even distance, m.
Copper and refractory composition part heat flow rate per unit area q2Calculate such as formula:
In formula: q2For copper and refractory composition part heat flow rate per unit area, kW/m2；tx1For inlaying refractory heat
Surface temperature, DEG C；B for inlaying refractory thickness, m；λ1For inlaying Refractory Thermal Conductivity, W/ (m DEG C)；
A is copper cooling wall wall thickness half, m；l1For cooling wall inner conduit spacing, m；D is cooling water pipe diameter,
m；α cools down heat transfer water coefficient, W/ (DEG C)；
It is considered that the meansigma methods that the heat flow rate per unit area of monoblock cooling wall is two part heat flow rate per unit areas in Practical Project,
So monoblock copper cooling wall heat flow rate per unit area q can also be expressed as:
Due to tx1And tx2Reflection is the temperature value of fore-and-aft distance the nearest 2, is simultaneously in again copper cooling
The hot side of wall, therefore, takes t hereinx1=tx2, therefore more than simultaneous various, finally extrapolate tx1And tx2, as follows
Formula:
2, blast furnace copper cooling stave hot side thickness of the slag crust judges system, according to blast furnace copper cooling stave Calculation of Heat Transfer model
The slag crust of the COMPREHENSIVE CALCULATING blast furnace copper cooling stave hot sides such as the blast furnace hot-face temperature calculated and slag crust heat conductivity remains
Remaining thickness, is then allowed minimal thickness by the rational slag crust of furnace volume and structure choice, determines that blast furnace copper cools down
Wall hot side thickness of the slag crust is the thinnest to come off to less than the minimal thickness or be complete allowed, if need
Set up rapidly certain thickness slag crust to protect copper cooling wall；Try to achieve copper cooling wall hot-face temperature and heat flow rate per unit area
In the case of, solidify boundary temperature condition with 1150 DEG C for slag crust, according to the thing including the material such as copper, slag crust
Property value just can release slag crust residual thickness Δ x according to heat transfer model is counter1:
In formula, λ2For slag crust heat conductivity, W/ (m DEG C)；△ t is slag crust cold and hot surface temperature difference, DEG C；T is slag
Skin solidification boundary temperature, DEG C；txFor copper cooling wall hot-face temperature i.e. slag crust coldface temperature, DEG C；Δx1Copper cools down
Wall hot side slag crust residual thickness, m.
Assuming that rational slag crust allows minimal thickness to be e, if Δ x1< e then needs to set up rapidly certain thickness
Slag crust protect copper cooling wall；In this example, e is 20mm.
3, blast furnace copper cooling stave refrigeration system, rapidly will according to the thickness of the slag crust estimate of situation of copper cooling wall hot side
The quickly cooling medium that cooling medium is switched to including liquid freon by demineralized water or soft water, along with liquid fluorine
The Quick-gasifying of the cold-producing mediums such as Leon, forces cooling to need blast furnace copper cooling stave to be protected, makes blast furnace copper cooling stave
Hot side sets up rapidly the protection of effective slag crust；
4, ventilation and heat and the cooling medium of whole system has been responsible in ventilation and purifier and control system
Liquefaction cycles, the cold-producing medium of gasification can be made in copper cooling wall cooling line to liquefy rapidly.Compressor
By the gaseous refrigerant of the gaseous refrigerant boil down to High Temperature High Pressure in copper cooling wall, it is then delivered to condenser heat radiation
After become the liquid refrigerant of normal temperature high voltage and be re-circulated to after filtering in copper cooling wall use.
5, step 1, step 2 are repeated, if copper cooling wall hot side thickness of the slag crust meets protection copper cooling wall
Low requirement, stops performing step 3, step 4 simultaneously, with switching back to original coolant by cooling medium, high
Stove copper cooling wall recovers normal cooling and operation.
Claims (2)
1. the method extending blast furnace copper cooling stave service life, it is characterised in that comprise the steps of
1) blast furnace copper cooling stave hot-face temperature calculates system, according to blast furnace copper cooling stave version, thermocouple
Installation site and quantity, blast furnace copper cooling stave methods for cooling, use blast furnace copper cooling stave Calculation of Heat Transfer model to count
Calculate blast furnace copper cooling stave hot-face temperature；
2) blast furnace copper cooling stave hot side thickness of the slag crust judges system, according to blast furnace copper cooling stave Calculation of Heat Transfer model
The blast furnace hot-face temperature calculated and the slag crust residue of slag crust heat conductivity COMPREHENSIVE CALCULATING blast furnace copper cooling stave hot side
Thickness, blast furnace copper cooling stave hot side thickness of the slag crust is the thinnest to low then to be allowed minimal thickness to determine by slag crust
Come off in the minimal thickness or be complete allowed, decide whether to set up rapidly certain thickness slag crust
Protect copper cooling wall；
3) blast furnace copper cooling stave refrigeration system, when the thickness of the slag crust of copper cooling wall hot side is less than the thin and thick allowed
The quickly cooling medium that cooling medium is switched to including liquid freon rapidly by degree by demineralized water or soft water, with
The Quick-gasifying of the cold-producing mediums such as liquid freon, force cooling to need blast furnace copper cooling stave to be protected, make blast furnace
Copper cooling wall hot side sets up rapidly the protection of effective slag crust；
4) ventilating and purifier and control system, ventilation and heat and the cooling of being responsible for whole system are situated between
The liquefaction cycles of matter, can make the cold-producing medium of gasification in copper cooling wall cooling line liquefy rapidly；Compression
Machine, by the gaseous refrigerant of the gaseous refrigerant boil down to High Temperature High Pressure in copper cooling wall, is then delivered to condenser and dissipates
The liquid refrigerant becoming normal temperature high voltage after heat is re-circulated in copper cooling wall use after filtering；
5) step 1, step 2 are repeated, if copper cooling wall hot side thickness of the slag crust meets protection copper cooling wall
Low requirement, stops performing step 3, step 4 simultaneously, with switching back to original coolant by cooling medium, high
Stove copper cooling wall recovers normal cooling and operation.
A kind of method extending blast furnace copper cooling stave service life the most according to claim 1, its feature
It is that slag crust allows minimal thickness 10-50mm.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107385131A (en) * | 2017-09-01 | 2017-11-24 | 武汉钢铁有限公司 | It is a kind of to tackle the bosh furnace bosh restoration of lower stack blast-furnace soft water cooling means that instantaneously big heat impacts |
| CN111500808A (en) * | 2020-03-18 | 2020-08-07 | 唐山钢铁集团有限责任公司 | Method for judging comprehensive heat-conducting performance of cooling wall |
| CN112575134A (en) * | 2020-12-04 | 2021-03-30 | 攀钢集团研究院有限公司 | Blast furnace slag skin thickness calculation method and blast furnace high-temperature area operation furnace type online calculation system |
| CN112668148A (en) * | 2020-12-04 | 2021-04-16 | 攀钢集团研究院有限公司 | Method for judging upper airflow distribution condition and furnace condition of high-titanium blast furnace |
| CN116663277A (en) * | 2023-05-22 | 2023-08-29 | 广州吉谷电器有限公司 | Method and device for prolonging service cycle based on water boiling kettle |
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| CN103439999A (en) * | 2013-08-23 | 2013-12-11 | 武汉钢铁(集团)公司 | Method for controlling abnormal furnace temperature of blast furnace according to temperature changes of cooling wall |
| CN104404187A (en) * | 2014-11-24 | 2015-03-11 | 中冶赛迪工程技术股份有限公司 | Blast furnace brickwork slag shell thickness monitoring system and method |
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| KR20030049815A (en) * | 2001-12-17 | 2003-06-25 | 주식회사 포스코 | method for prolonging of blast furnace stave campaign life |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107385131A (en) * | 2017-09-01 | 2017-11-24 | 武汉钢铁有限公司 | It is a kind of to tackle the bosh furnace bosh restoration of lower stack blast-furnace soft water cooling means that instantaneously big heat impacts |
| CN111500808A (en) * | 2020-03-18 | 2020-08-07 | 唐山钢铁集团有限责任公司 | Method for judging comprehensive heat-conducting performance of cooling wall |
| CN111500808B (en) * | 2020-03-18 | 2021-10-12 | 唐山钢铁集团有限责任公司 | Method for judging comprehensive heat-conducting performance of cooling wall |
| CN112575134A (en) * | 2020-12-04 | 2021-03-30 | 攀钢集团研究院有限公司 | Blast furnace slag skin thickness calculation method and blast furnace high-temperature area operation furnace type online calculation system |
| CN112668148A (en) * | 2020-12-04 | 2021-04-16 | 攀钢集团研究院有限公司 | Method for judging upper airflow distribution condition and furnace condition of high-titanium blast furnace |
| CN112668148B (en) * | 2020-12-04 | 2022-07-29 | 攀钢集团研究院有限公司 | Method for judging upper airflow distribution condition and furnace condition of high-titanium blast furnace |
| CN116663277A (en) * | 2023-05-22 | 2023-08-29 | 广州吉谷电器有限公司 | Method and device for prolonging service cycle based on water boiling kettle |
| CN116663277B (en) * | 2023-05-22 | 2023-12-26 | 广州吉谷电器有限公司 | Method and device for prolonging service cycle based on water boiling kettle |
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| CN106319118B (en) | 2018-04-03 |
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