CN101492748A - Two-stage type blowing breeze method and apparatus for blast furnace - Google Patents
Two-stage type blowing breeze method and apparatus for blast furnace Download PDFInfo
- Publication number
- CN101492748A CN101492748A CNA2009100104705A CN200910010470A CN101492748A CN 101492748 A CN101492748 A CN 101492748A CN A2009100104705 A CNA2009100104705 A CN A2009100104705A CN 200910010470 A CN200910010470 A CN 200910010470A CN 101492748 A CN101492748 A CN 101492748A
- Authority
- CN
- China
- Prior art keywords
- valve
- pulverized coal
- winding
- blowing
- transportation pipe
- 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.)
- Pending
Links
Images
Landscapes
- Manufacture Of Iron (AREA)
Abstract
The invention relates to a method for two-stage coal injection in blast furnace ironmaking and a device thereof. The invention is characterized in that the inventive two-stage coal injection device provided with a special distributor, an inert gas special pipeline, a plurality of control valves, a flowmeter and a control meter is utilized, fixed operational programs are executed and partial technological parameters are controlled, thus realizing the two-stage coal injection of the blast furnace; through practical production verification for 40 days, by adopting the device and method, blockage of injection guns is effectively avoided; the average coal ratio of the blast furnace is increased by 11.35kg/tHM; and the coke ratio is reduced by 9.87kg/tHM.
Description
Affiliated technical field:
A kind of method and apparatus of blast furnace ironmaking two-stage type blowing breeze.
Technical background
Blast furnace ironmaking now and future will be the main process of production molten iron in the smelting iron and steel always, have the incomparable production advantage.And utilize blast-furnace tuyere to be the winding-up mouth, the technology of coal injection has been implemented for many years in blast furnace, and coal dust replaces a part of coke, has obtained metallurgical effect energetically.
2003; patented technology (the patent No.: ZL00123294.0) can be that " technology for smelting iron in blast furnace by two-segment blowing of powdered coal " occurred with breeze blowing to blast furnace melting with soft top, furnace bosh or restoration of lower stack position; with this alleviate before the air port and dropping zone in local excessive accumulated powder; it is poor to reduce blast furnace stock column total head; helping improving coal powder blowing amount and reinforcing blast furnace smelts; this technology can also effectively be protected coke strenth simultaneously, improves every technical indicator of blast furnace ironmaking.But, improper if operating parameters is selected when implementing the two-part winding-up, problems such as spray gun obstruction, coal dust skewness appear easily, and make this innovation and creation not reach due effect.
Goal of the invention
The purpose of this invention is will be on the patented technology basis of blast furnace two-stage type blowing breeze, in stove, fully be utilized for fear of stifled rifle occurring and guarantee to spray into coal dust, require further to improve the method and apparatus of winding-up, make the two-stage type blowing breeze technology be utilized effectively, and in the whole nation and even world wide, applied rapidly.
Inventive principle
The coal dust that sprays into from second section spray gun enters into after the high furnace interior; coal dust can be distributed to comparatively uniformly under the effect of carrier gas the winding-up position around; contacting with carbonic acid gas in the coal gas in the stove afterwards can be prior to the quick gasification reaction of coke; generate carbon monoxide; because the gasification reaction of coal dust has consumed carbonic acid gas; thereby protected coke to greatest extent; make it the intensity that still keeping enough; the uniform distribution of coal dust can obviously improve the ventilation property of blast furnace stock column simultaneously, makes blast furnace be able to further high yield direct motion.
Based on above principle, the ideal blowing process must guarantee that the fine coal flow that utilizes second section breeze blowing equipment to be injected in the blast furnace will stablize, and the concentration and the flow of the Dual-Phrase Distribution of Gas olid that coal dust and carrier gas form are relatively stable.Clearly be exactly in fact:
1. be that specific equipment or the device that second section coal injection set up must fully satisfy the requirement of stablizing blowing process;
2. to guarantee the suitable winding-up amount of coal dust in second section spray gun in the operation, and the uniform distribution in each spray gun;
3. carry out suitably secondary air compensating and guarantee certain jetting pressure with this suitable solid-gas ratio that guarantees Dual-Phrase Distribution of Gas olid.
Summary of the invention
This invention is with the further refinement of blast furnace ironmaking two-stage type blowing breeze technology, establishes isolated plant, on this basis, implements suitable processing parameter, makes it to obtain satisfied more winding-up effect.
This invention is adopted special blowing device on two-stage type blowing breeze technology basis in the past, this kind device not only comprises pipeline, spray gun, and comprises special-purpose divider, rare gas element pipe special and a plurality of by-pass valve control, under meter, control table etc.Concrete structure sees later description of drawings for details as shown in Figure 1.
Second section blowing process that this invention is created the two-stage type blowing breeze of being finished comprises following concrete operation method.
1. connect the nitrogen of nitrogen gas delivery-line 10, open on power transportation pipe 1 and the nitrogen gas delivery-line 10 all valves except that trip valve 2 successively to maximum opening degree, all pipelines are purged, time remaining is in 30 minutes, with this comprehensive mediation of guaranteeing power transportation pipe 1, close all valves then;
2. open variable valve 4 and control it and be opened to a certain degree, open trip valve 2 and blowing valve 6 again, guarantee that coal dust can be assigned on power transportation pipe 1 each branch road at pulverized coal gun 9 places uniformly, wherein the coal dust to blowing valve 6 is that concentrated phase is carried from trip valve 2, and its solid-gas ratio is 50～75kg/kg;
3. according to the displayed value of single rifle winding-up under meter 7, regulate secondary air-supplementing valve 12, controlling second section list, to prop up pulverized coal gun 9 winding-up amounts be 3～5kg/tHM, solid-gas ratio≤20kg/kg, and second section list props up the jetting pressure P in pulverized coal gun 9 exits
Spray=P
Wind+ 50kPa～P
Wind+ 150kPa, wherein P
WindBe blast-furnace hot-air pressure.
4. when the first section winding-up of coal dust undertaken by the air port such as stop-spraying, second section breeze blowing of shaft be stop-spraying thereupon;
5. to close all valves in the blowing device during blast furnace staying, recover by the said step of aforesaid operations 1-3 bar again behind the multiple wind comprehensively.
In the aforesaid method, secondary air compensating is very important.Generally speaking, hot blast enters in the stove from the air port in the blast furnace production process, produces the district of circling round, and makes the coal dust that sprays into from the air port successfully to enter in the stove.But,,, cause coal spraying pipeline to stop up owing to do not exist the district of circling round, the coal dust that sprays into to be deposited in the outlet of coal rifle if still adopt the air port mode to carry out coal powder injection second section spray gun position.Therefore, second section list props up the jetting pressure (P in pulverized coal gun 9 exits
Spray) should be greater than blast-furnace hot-air pressure (P
Wind) 50kPa～150kPa, i.e. P
Spray=P
Wind+ 50kPa～P
Wind+ 150kPa, and keeping of this pulverized coal gun 9 outlet pressure must be carried out secondary air compensating and guarantee by regulating secondary air-supplementing valve 12.Usually divider 5 total pipe pressures are 0.5～0.65MPa, and the secondary air compensating source of the gas is selected high pressure nitrogen, the about 1.5MPa of its pressure.
Description of drawings
Accompanying drawing 1 is the schematic diagram of the employed blast furnace second winding-up of this invention coal dust equipment therefor. As shown in Figure 1, this dress Put total power transportation pipe 1, cut off valve 2, second segment winding-up total flow meter 3, control valve 4, distributor 5, blowing valve 6, Single coal dust spray gun winding-up flowmeter 7, jetting pressure table 8, coal dust spray gun 9, nitrogen gas delivery-line 10, nitrogen purge valve 11, Secondary air-supplementing valve 12 forms. Wherein, cut-out valve 2, second segment winding-up total flow meter 3, control valve 4, distributor 5 pass through coal Powder conveyance conduit 1 is together in series successively, and distributor 5 joins with each coal dust spray gun 9 by power transportation pipe 1, from distributor 5 each of drawing connect all be equipped with successively on spray gun power transportation pipes 1 blowing valve 6, single coal dust spray gun winding-up flowmeter 7, Jetting pressure table 8 and coal dust spray gun 9, nitrogen gas delivery-line 10 parallel connections totally three of two nitrogen blowings and secondary air compensatings The road, wherein a purging branch road in two nitrogen blowing branch roads by nitrogen purge valve 11 in that to cut off the winding-up of valve 2 and second segment total Communicate with power transportation pipe 1 between the flowmeter 3, on another nitrogen blowing branch road and in succession and coal dust spray gun 9 quantity equate A plurality of single purging branch road, each single purging branch road again the nitrogen purge valve 11 by separately in power transportation pipe 1 each spray Communicate with it between the blowing valve 6 on gun road and single coal dust spray gun winding-up flowmeter 7, the secondary air compensating branch road passes through secondary air compensating Valve 12 communicates with it between the blowing valve 6 of power transportation pipe 1 and single coal dust spray gun winding-up flowmeter 7 equally, system Single spray gun and pipeline thereof have 4～6, wherein 2000m3Following blast furnace can arrange four second segment spray guns, 2000m3More than Blast furnace can arrange six second segment spray guns.
Said apparatus can guarantee carrying out smoothly of blast furnace two-part winding-up operating procedure.
The invention effect
Two-stage type blowing breeze technology has positive impact to the blast furnace operating index, has obtained due effect, is mainly manifested in:
1. coke sampling result in air port shows: second segment coal dust spray gun position is the coke granularity in air port, place on the line vertically downward Greater than the coke under the no second segment spray gun on its top vertical line, and vertically downward air port, the place taking-up on the line of spray gun position Coke rotary drum intensity to be higher than no second segment spray gun coke about 2%;
2. unburned coal powder content is not when adopting this technology basic one in the gravity deduster ashes when adopting the two-part coal spraying process Cause, show that the coal dust that the second segment spray gun sprays into blast furnace has obtained utilizing fully;
3. after adopting the two-part winding-up, coal is than increasing, and coke ratio reduces, thereby has reduced production cost.
4. adopt the two-part winding-up, guaranteeing that the blow rate required increases under the constant prerequisite of stock column pressure reduction, output also improves thereupon, with Shi Tieshui contains [Si] amount, slag composition is substantially stable, and the molten iron qualification rate does not reduce.
Embodiment
The volume of certain Steel Plant's blast furnace is 1800m
3, implementing the two-part winding-up initial stage, because blowing device is reasonable inadequately, and correlation parameter control is improper, stifled rifle accident takes place frequently (reaching sometimes 8 times/day), does not receive due effect.Adopt this invention technology, the device shown in its blowing device and the accompanying drawing 1 is consistent, has four spray guns, is being symmetrically distributed on the same circumference along the shaft cross section above blast furnace stack bottom, the cohesive zone.And properly controlled the operating parameters of second section injection system, wherein:
1. single rifle winding-up amount 350～650kg/h, average 402kg/h;
2. by secondary air compensating control solid-gas ratio≤20kg/kg;
3. control jetting pressure P
Wind+ 50kPa～P
Wind+ 150kPa, mean pressure are P
Wind+ 110kPa.
Entire operation was jetted 40 days continuously, and stifled rifle accident takes place once, and the average coal ratio of blast furnace increases 11.35kg/tHM, coke ratio reduction 9.87kg/tHM, and the two-section type winding-up has obtained metallurgical effect preferably.
Claims (2)
1. the method for a blast furnace ironmaking two-stage type blowing breeze, the second section blowing device that adopts in the method comprises power transportation pipe 1, pulverized coal gun 9, it is characterized in that also comprising in the blowing device trip valve 2, second section winding-up total flux meter 3, variable valve 4, divider 5, blowing valve 6, single pulverized coal gun winding-up under meter 7, jetting pressure table 8, nitrogen gas delivery-line 10, nitrogen purge valve 11, secondary air-supplementing valve 12 is formed, wherein, trip valve 2, second section winding-up total flux meter 3, variable valve 4, divider 5 is together in series successively by power transportation pipe 1, divider 5 joins with each pulverized coal gun 9 by power transportation pipe 1, on each connection spray gun power transportation pipe 1 that divider 5 is drawn, blowing valve 6 is installed successively all, single pulverized coal gun winding-up under meter 7, jetting pressure table 8 and pulverized coal gun 9, two nitrogen purgings and secondary air compensating totally three branch roads in nitrogen gas delivery-line 10 parallel connections, wherein a purging branch road in two nitrogen purging branch roads communicates with power transportation pipe 1 between trip valve 2 and second section winding-up total flux meter 3 by nitrogen purge valve 11, on another nitrogen purging branch road and in succession and a plurality of single purging branch road that pulverized coal gun 9 quantity equate, each single purging branch road nitrogen purge valve 11 by separately again communicates with it between the blowing valve 6 of power transportation pipe 1 each spray gun branch road and single pulverized coal gun winding-up under meter 7, the secondary air compensating branch road communicates with it between the blowing valve 6 of power transportation pipe 1 and single pulverized coal gun winding-up under meter 7 equally by secondary air-supplementing valve 12, when utilizing aforesaid this device coal injection, at first connect the nitrogen of nitrogen gas delivery-line 10, open on power transportation pipe 1 and the nitrogen gas delivery-line 10 all valves except that trip valve 2 successively to maximum opening degree, all pipelines are purged, power transportation pipe 1 is closed all valves after the mediation comprehensively, open variable valve 4 then and control it and be opened to a certain degree, open trip valve 2 and blowing valve 6 again, again according to the displayed value of single rifle winding-up under meter 7, regulate secondary air-supplementing valve 12, controlling second section list, to prop up pulverized coal gun 9 winding-up amounts be 3～5kg/tHM, solid-gas ratio≤20kg/kg, and second section list props up the jetting pressure P in pulverized coal gun 9 exits
Spray=P
Wind+ 50kPa～P
Wind+ 150kPa.
2. second section blowing device that the blast furnace ironmaking two-stage type blowing breeze is used, this device comprises power transportation pipe 1, pulverized coal gun 9, it is characterized in that also comprising in the blowing device trip valve 2, second section winding-up total flux meter 3, variable valve 4, divider 5, blowing valve 6, single pulverized coal gun winding-up under meter 7, jetting pressure table 8, nitrogen gas delivery-line 10, nitrogen purge valve 11, secondary air-supplementing valve 12 is formed, wherein, trip valve 2, second section winding-up total flux meter 3, variable valve 4, divider 5 is together in series successively by power transportation pipe 1, divider 5 joins with each pulverized coal gun 9 by power transportation pipe 1, on each connection spray gun power transportation pipe 1 that divider 5 is drawn, blowing valve 6 is installed successively all, single pulverized coal gun winding-up under meter 7, jetting pressure table 8, pulverized coal gun 9, two nitrogen purgings and secondary air compensating totally three branch roads in nitrogen gas delivery-line 10 parallel connections, wherein a purging branch road in two nitrogen purging branch roads communicates with power transportation pipe 1 between trip valve 2 and second section winding-up total flux meter 3 by nitrogen purge valve 11, on another nitrogen purging branch road and in succession and a plurality of single purging branch road that pulverized coal gun 9 quantity equate, each single purging branch road nitrogen purge valve 11 by separately again communicates with it between the blowing valve 6 of power transportation pipe 1 each spray gun branch road and single pulverized coal gun winding-up under meter 7, and the secondary air compensating branch road communicates with it between the blowing valve 6 of power transportation pipe 1 and single pulverized coal gun winding-up under meter 7 equally by secondary air-supplementing valve 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100104705A CN101492748A (en) | 2009-02-27 | 2009-02-27 | Two-stage type blowing breeze method and apparatus for blast furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100104705A CN101492748A (en) | 2009-02-27 | 2009-02-27 | Two-stage type blowing breeze method and apparatus for blast furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN101492748A true CN101492748A (en) | 2009-07-29 |
Family
ID=40923537
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNA2009100104705A Pending CN101492748A (en) | 2009-02-27 | 2009-02-27 | Two-stage type blowing breeze method and apparatus for blast furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101492748A (en) |
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921886A (en) * | 2010-08-05 | 2010-12-22 | 中冶南方工程技术有限公司 | Method for controlling coal injecting rate of blast furnace |
| CN102888476A (en) * | 2012-10-15 | 2013-01-23 | 中冶南方工程技术有限公司 | Blast furnace coal injection method by using blast furnace gas as coal injection delivery carrier |
| CN103233086A (en) * | 2013-05-16 | 2013-08-07 | 新兴河北工程技术有限公司 | Mutual pulverized coal injection pipeline for iron-making blast furnace |
| CN104232820A (en) * | 2013-06-14 | 2014-12-24 | 山西太钢不锈钢股份有限公司 | Coal-injection setting optimization method based on calculation on blast-furnace discharged material speed difference |
| TWI490437B (en) * | 2013-12-04 | 2015-07-01 | 中國鋼鐵股份有限公司 | Pulverized coal injection system of blast furnace and method for clearing out pulverized coal injecting pipe thereof |
| CN108120290A (en) * | 2017-03-31 | 2018-06-05 | 中冶长天国际工程有限责任公司 | A kind of combustion gas blowing device and combustion gas blowing method |
| CN108220515A (en) * | 2018-03-01 | 2018-06-29 | 东北大学 | A kind of vertical two-part pulverized coal injection in blast furnace method |
| CN108265141A (en) * | 2018-03-01 | 2018-07-10 | 东北大学 | A kind of vertical two-part blast-furnace coal injection device |
| CN108265146A (en) * | 2018-03-01 | 2018-07-10 | 东北大学 | The vertical apparatus of gas fluid distrbution in a kind of improvement blast furnace |
| CN109161621A (en) * | 2018-11-19 | 2019-01-08 | 东北大学 | A kind of two-part blast-furnace coal injection device |
| CN110690481A (en) * | 2019-09-23 | 2020-01-14 | 北京亿华通科技股份有限公司 | Pressure regulator control method of fuel cell system |
| CN111154933A (en) * | 2020-01-03 | 2020-05-15 | 青岛恒拓环保科技有限公司 | Pressure equalizing device between injection tanks of blast furnace coal injection system |
| CN113174453A (en) * | 2021-04-28 | 2021-07-27 | 陕西龙门钢铁有限责任公司 | Application of activated carbon powder in sintered ore desulfurization process |
| CN114774601A (en) * | 2022-03-29 | 2022-07-22 | 青岛恒拓环保科技有限公司 | Intelligent coal injection control system of iron-making blast furnace |
-
2009
- 2009-02-27 CN CNA2009100104705A patent/CN101492748A/en active Pending
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101921886A (en) * | 2010-08-05 | 2010-12-22 | 中冶南方工程技术有限公司 | Method for controlling coal injecting rate of blast furnace |
| CN101921886B (en) * | 2010-08-05 | 2011-11-09 | 中冶南方工程技术有限公司 | Method for controlling coal injecting rate of blast furnace |
| CN102888476A (en) * | 2012-10-15 | 2013-01-23 | 中冶南方工程技术有限公司 | Blast furnace coal injection method by using blast furnace gas as coal injection delivery carrier |
| CN103233086A (en) * | 2013-05-16 | 2013-08-07 | 新兴河北工程技术有限公司 | Mutual pulverized coal injection pipeline for iron-making blast furnace |
| CN104232820A (en) * | 2013-06-14 | 2014-12-24 | 山西太钢不锈钢股份有限公司 | Coal-injection setting optimization method based on calculation on blast-furnace discharged material speed difference |
| CN104232820B (en) * | 2013-06-14 | 2015-12-02 | 山西太钢不锈钢股份有限公司 | A kind of coal powder injection setting optimization method calculated based on blast furnace blanking material speed difference |
| TWI490437B (en) * | 2013-12-04 | 2015-07-01 | 中國鋼鐵股份有限公司 | Pulverized coal injection system of blast furnace and method for clearing out pulverized coal injecting pipe thereof |
| CN108120290A (en) * | 2017-03-31 | 2018-06-05 | 中冶长天国际工程有限责任公司 | A kind of combustion gas blowing device and combustion gas blowing method |
| CN108120290B (en) * | 2017-03-31 | 2023-09-29 | 中冶长天国际工程有限责任公司 | Gas injection device and gas injection method |
| CN108265146A (en) * | 2018-03-01 | 2018-07-10 | 东北大学 | The vertical apparatus of gas fluid distrbution in a kind of improvement blast furnace |
| CN108220515A (en) * | 2018-03-01 | 2018-06-29 | 东北大学 | A kind of vertical two-part pulverized coal injection in blast furnace method |
| CN108265146B (en) * | 2018-03-01 | 2019-09-03 | 东北大学 | The vertical apparatus of gas fluid distrbution in a kind of improvement blast furnace |
| CN108220515B (en) * | 2018-03-01 | 2019-09-03 | 东北大学 | A kind of vertical two-part pulverized coal injection in blast furnace method |
| CN108265141A (en) * | 2018-03-01 | 2018-07-10 | 东北大学 | A kind of vertical two-part blast-furnace coal injection device |
| CN109161621A (en) * | 2018-11-19 | 2019-01-08 | 东北大学 | A kind of two-part blast-furnace coal injection device |
| CN109161621B (en) * | 2018-11-19 | 2019-11-05 | 东北大学 | A kind of two-part blast-furnace coal injection device |
| CN110690481A (en) * | 2019-09-23 | 2020-01-14 | 北京亿华通科技股份有限公司 | Pressure regulator control method of fuel cell system |
| CN110690481B (en) * | 2019-09-23 | 2021-04-27 | 北京亿华通科技股份有限公司 | Pressure regulator control method of fuel cell system |
| CN111154933A (en) * | 2020-01-03 | 2020-05-15 | 青岛恒拓环保科技有限公司 | Pressure equalizing device between injection tanks of blast furnace coal injection system |
| CN111154933B (en) * | 2020-01-03 | 2021-06-08 | 青岛恒拓环保科技有限公司 | Pressure equalizing device between injection tanks of blast furnace coal injection system |
| CN113174453A (en) * | 2021-04-28 | 2021-07-27 | 陕西龙门钢铁有限责任公司 | Application of activated carbon powder in sintered ore desulfurization process |
| CN114774601A (en) * | 2022-03-29 | 2022-07-22 | 青岛恒拓环保科技有限公司 | Intelligent coal injection control system of iron-making blast furnace |
| CN114774601B (en) * | 2022-03-29 | 2024-01-23 | 青岛恒拓环保科技有限公司 | Intelligent coal injection control system of ironmaking blast furnace |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101492748A (en) | Two-stage type blowing breeze method and apparatus for blast furnace | |
| CN101254861B (en) | Fine coal dense phase conveying system of fusion reducing furnace | |
| CN102115798A (en) | Method for protecting blast furnace by injecting coal and spraying schreyerite powder | |
| JP5194504B2 (en) | Apparatus for injecting gas reducing material into blast furnace and operating method of blast furnace using the same | |
| KR101344102B1 (en) | Method of integrating a blast furnace with an air gas separation unit | |
| CN102031325A (en) | Iron making system and process for producing molten iron by melting gasification | |
| CN103205515A (en) | Blast furnace coke oven gas injection system and method thereof | |
| CN104854249A (en) | Equipment for injecting oxygen from blast furnace tuyere and blast furnace operation method | |
| CN112143847A (en) | Method and device for adjusting vault temperature and coal gas yield in total oxygen smelting reduction iron-making process | |
| CN113549717A (en) | Blast furnace gas injection system for Europe and metallurgy | |
| US10633199B2 (en) | Enhanced pressurising of bulk material in lock hoppers | |
| CN111690787B (en) | System and method for improving coal gas recovery amount by blowing coal powder at converter mouth | |
| RU2263715C2 (en) | Metal melting method and apparatus | |
| CN215799659U (en) | Blast furnace gas injection system for Europe and metallurgy | |
| CN107841593A (en) | A kind of auxiliary material nitrogen seal device and its control method | |
| CN103620068B (en) | The system and method for the gas and microgranule conveying for metallurgical tank | |
| CN209957819U (en) | Improved control device for coal distributing bottle of blast furnace | |
| CN200955055Y (en) | Blast furnace two-section type coal-spraying mechanism | |
| CN112342335A (en) | Converter smoke dust overflow control method | |
| CN111910038A (en) | Device for adding circulating coal gas to crown of gasification furnace of pyrometallurgical furnace | |
| CN201778037U (en) | Pure oxygen magnesium spraying device for realizing fast blowing-in of blast furnace | |
| CN219409773U (en) | Blast furnace coal injection double-distributor control system based on pulverized coal flow regulating valve | |
| SMAHA et al. | Introducing SIP Technology and its Impact on Blast Furnace Operation | |
| KR101191969B1 (en) | Control device and control method for reduction gas of pig iron manufacturing equipment | |
| KR100391914B1 (en) | Process for coal based ironmaking to reduce loss of fine ore |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Open date: 20090729 |