CN108265154A - A kind of automatic control system for preventing converter smelting coal gas venting of dust explosion - Google Patents
A kind of automatic control system for preventing converter smelting coal gas venting of dust explosion Download PDFInfo
- Publication number
- CN108265154A CN108265154A CN201810177062.8A CN201810177062A CN108265154A CN 108265154 A CN108265154 A CN 108265154A CN 201810177062 A CN201810177062 A CN 201810177062A CN 108265154 A CN108265154 A CN 108265154A
- Authority
- CN
- China
- Prior art keywords
- converter
- nitrogen injection
- nitrogen
- control system
- gas
- 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
- 239000000428 dust Substances 0.000 title claims abstract description 29
- 239000003034 coal gas Substances 0.000 title claims abstract description 26
- 238000004880 explosion Methods 0.000 title claims abstract description 24
- 238000013022 venting Methods 0.000 title claims abstract description 24
- 238000003723 Smelting Methods 0.000 title claims description 11
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims abstract description 116
- 239000007789 gas Substances 0.000 claims abstract description 59
- 229910052757 nitrogen Inorganic materials 0.000 claims abstract description 58
- 238000002347 injection Methods 0.000 claims abstract description 56
- 239000007924 injection Substances 0.000 claims abstract description 56
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 37
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 24
- 239000001301 oxygen Substances 0.000 claims abstract description 24
- 238000001514 detection method Methods 0.000 claims abstract description 9
- 239000000523 sample Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 10
- 238000012360 testing method Methods 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000012716 precipitator Substances 0.000 abstract description 4
- 238000009628 steelmaking Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- 238000007664 blowing Methods 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 4
- 230000005684 electric field Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 230000003068 static effect Effects 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010790 dilution Methods 0.000 description 2
- 239000012895 dilution Substances 0.000 description 2
- 238000000605 extraction Methods 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 241001503485 Mammuthus Species 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000003546 flue gas Substances 0.000 description 1
- 238000004868 gas analysis Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 238000009827 uniform distribution Methods 0.000 description 1
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
- C21C5/38—Removal of waste gases or dust
- C21C5/40—Offtakes or separating apparatus for converter waste gases or dust
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
- Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
Abstract
A kind of automatic control system for preventing coal gas of converter venting of dust explosion, belongs to steelmaking technical field.Including OG facility exits gas piping, laser gas analyzer, nitrogen injection device and converter second control system；The detection probe of laser gas analyzer is directly installed on OG facility exit gas pipings, and nitrogen injection device includes：Nitrogen injection control valve group, nitrogen injection endless tube and intermediate conduit, nitrogen injection control valve group is connected by intermediate conduit and nitrogen injection endless tube, the nitrogen injection endless tube is sleeved on OG facility exit gas pipings, nitrogen injection endless tube set sets multiple injection points, and multiple injection points are circumferentially uniformly distributed.Terminate duration of blast section the advantage is that solving in the existing wet electric precipitator of once dust collection of converter facility rifle under converter oxygen gun and starting to blow and carry rifle, easily generate venting of dust explosion, influence the problem of converter normally produces, ensure primary dedusting equipment safety and converter steady production.
Description
Technical field
The invention belongs to steelmaking technical field more particularly to a kind of prevent the automatically controlling for converter smelting coal gas venting of dust explosion from being
System.
Background technology
The environmental protection pressure that steel and iron manufacturing industry faces increasingly is sent out greatly, and flue gas emission of converter is up to state standards only base
This requirement, place row's control standard in many areas are also higher than national standard.Present once dust collection of converter technology, in addition to mammoth conveter, factory is big
Mostly using dry method dust, can meet country with outside the discharge standard of place, in many, the OG method dedustings that primary converter factory generally uses
(including novel OG methods and semidry method), it is impossible to meet increasingly stringent environmental requirement.Therefore, BOF steelmaking shop, it is particularly middle or small
The primary dedusting facility environmental transformation of converter shed is imperative.OG wet dust removals+wet static dedusting technology is a kind of economic conjunction
The technical solution of reason, concentration of emission can reach 30mg/Nm3Hereinafter, meet discharging standards and local tightened up row
Standard is put, and this technology has started application implementation.But wet cottrell normal work to converter smelting coal gas into
Dividing has stringent control requirement, if CO>9% and O2>6% may generate venting of dust explosion, influence converter and normally produce, therefore how steady
It is the technical problem that wet static dedusting technology application faces that fixed production, which prevents venting of dust explosion,.
Invention content
The purpose of the present invention is to provide a kind of automatic control systems for preventing converter smelting coal gas venting of dust explosion, solve and reduce
The possibility of potential converter smelting coal gas venting of dust explosion in the application of wet static dedusting technology, stablizes converter and normally produces.
The automatic control system of the present invention, including：OG facility exits gas piping 1, laser gas analyzer 2, nitrogen spray
Blowing apparatus and converter second control system 3.The detection probe of the laser gas analyzer 2 is directly installed on OG facility exits
On gas piping 1, coal gas of converter composition is tested and analyzed in real time；Described controls program setting in converter second control system 3
Under the conditions of converter oxygen gun start oxygen blow duration section and stop oxygen blow duration section be blown nitrogen into OG facility exits gas piping 1
Gas.
OG facility exits gas piping 1, laser gas analyzer 2, converter second control system 3, nitrogen injection control valve
Group 4, nitrogen injection endless tube 5, intermediate conduit 6, pneumatic fast cut valve 7, flow control valve 8.
Further, the nitrogen injection device includes：Nitrogen injection control valve group 4, nitrogen injection endless tube 5 and centre
Pipeline 6, nitrogen injection control valve group 4 are connected by intermediate conduit 6 and nitrogen injection endless tube 5；The nitrogen injection endless tube set 5
On OG facility exits gas piping 1, multiple injection points is set to be blown into gas piping, multiple injection points are circumferentially uniform
Distribution.
Further, the converter second control system receives the data that laser gas analyzer 2 transmits, and calculates and leads to
Cross the injection flow that nitrogen injection control valve group 4 controls nitrogen in real time.
Into upper step, the laser gas analyzer 2 is installed on OG facility exit gas piping leading portions, nitrogen injection ring
Pipe 5 is installed on 1 back segment of OG facility exits gas piping.
The method that the present invention prevents converter smelting coal gas venting of dust explosion is：It is installed on OG facility exits gas piping 1 online sharp
Light gas analyzer detects coal gas composition in real time.Start oxygen blow duration section in converter oxygen gun and stop oxygen blow duration section, due to turning
Stove, which is smelted, easily occurs CO>9% and O2>6% generates venting of dust explosion, therefore, is blown in the two time windows into gas piping centainly
CO and O in the nitrogen dilution coal gas of converter of fundamental quantity2, eliminate potential venting of dust explosion possibility.If the CO and O that detect2The two
Simultaneously all beyond permissible value, and wherein at least there is 1 beyond permissible value≤20%, then calculated by converter second control system
The nitrogen flow being blown is needed, automatic control system adjusts the flow control valve in nitrogen injection valve group in real time, increases to turning
CO, O in producer gas2Dilution, so as to reduce coal gas of converter venting of dust explosion.If the CO and O that detect2The two is simultaneously all beyond fair
Perhaps it is worth, and all exceeds>20%, then automatic control system directly close wet electric precipitator high voltage electric field, avoid venting of dust explosion.
Technical solution provided by the invention, has the following technical effect that：
1st, the detection probe of gas analyzer is directly installed on OG facility exit gas pipings, this on-line gas analysis
Mode tests and analyzes out coal gas of converter composition in real time, compared to the offline mode for analyzing detection gas extraction, testing number
It according to more rapidly, is not delayed, is more advantageous to anti-venting of dust explosion control.
2nd, start oxygen blow duration section in converter oxygen gun and stop oxygen blow duration section, since CO easily occurs for converter smelting>9% and
O2>6% generates venting of dust explosion, and therefore, the nitrogen for being blown certain fundamental quantity into gas piping in the two time windows dilutes converter
CO and O in coal gas2, eliminate potential venting of dust explosion possibility.If the CO and O that detect2The two all exceeds permissible value simultaneously, and
Wherein at least there is 1 to exceed permissible value≤20%, then the nitrogen flow for needing to be blown calculated by converter second control system,
Automatic control system adjusts the flow control valve in nitrogen injection valve group in real time, increases to CO, O in coal gas of converter2It is dilute
It releases, so as to reduce coal gas of converter venting of dust explosion.If the CO and O that detect2The two is simultaneously all beyond permissible value, and all>20%, then certainly
Autocontrol system directly closes wet electric precipitator high voltage electric field, avoids venting of dust explosion.These automatically control measure, advantageously ensure that primary
Dust removal installation equipment safety and converter steady production.
Description of the drawings
Fig. 1 is the system composition schematic diagram that the embodiment of the present invention carries arch.Wherein, OG facility exits gas piping 1, laser
It is gas analyzer 2, converter second control system 3, nitrogen injection control valve group 4, nitrogen injection endless tube 5, intermediate conduit 6, pneumatic
Fast cut valve 7, flow control valve 8.
Specific embodiment
Above-mentioned technical proposal in order to better understand, in conjunction with appended figures and specific embodiments to upper
Technical solution is stated to be described in detail.
Referring to Fig. 1, the automatic control system processed provided in an embodiment of the present invention for preventing converter smelting coal gas venting of dust explosion, including：
OG facility exits gas piping 1, laser gas analyzer 2, nitrogen injection device and converter second control system 3.Laser gas
The detection probe of analyzer 2, which is mounted directly, puts on OG facility exits gas piping 1, tests and analyzes coal gas of converter composition in real time.
Nitrogen injection device converter second control system 3 control program setting under conditions of converter oxygen gun start oxygen blow duration section and
Stop oxygen blow duration section nitrogen-blow into OG facility exits gas piping 1.The online mounting means of laser gas analyzer 2,
Coal gas of converter composition is tested and analyzed out in real time, compared to the offline mode for analyzing detection gas extraction, detection data is more
Rapidly, it is not delayed, is more advantageous to anti-venting of dust explosion control.
In order to realize that converter second control system 3 automatically controls nitrogen-blow, nitrogen injection device includes：Nitrogen sprays
Control valve group 4, nitrogen injection endless tube 5 and intermediate conduit 6 are blown, nitrogen injection endless tube 5 is sleeved on OG facility exits gas piping 1,
4 injection points of setting are blown into gas piping 1, and 4 injection points are circumferentially uniformly distributed；Nitrogen injection control valve group 4 is logical
Intermediate conduit 6 is crossed to connect with nitrogen injection endless tube 5.
Converter second control system 3 receives the data that laser gas analyzer 2 transmits, and calculates and passes through nitrogen injection control
Valve group 4 controls the injection flow of nitrogen in real time.
Laser gas analyzer 2 is installed on 1 leading portion of OG facility exits gas piping, and nitrogen injection endless tube 5 is installed on OG and sets
Apply outlet 1 back segment of gas piping.
The work step of the present invention is as follows：
1) rifle starts to blow under converter oxygen gun, and the pneumatic fast cut valve 7 of nitrogen injection control valve group 4 is automatic with opening oxygen point interlocking
It opens, starts the nitrogen-blow into gas piping 1, nitrogen bare flow is 5000Nm3/ h, flow are controlled by flow control valve 8；
2 on-line real-time measuremen of laser gas analyzer analyzes coal gas composition, if rifle starts to blow CO always in the 90s times under oxygen rifle
≤ 9% and O2≤ 6%, then after starting blowing delay 90s, pneumatic fast cut valve 7 is automatically closed.Laser gas analyzer 2 is in converter
Whole detection and analysis coal gas composition in real time, stores data in second control system server, for converter two level in smelting cycle
Control system 3 uses；
2) converter oxygen gun carries rifle and terminates to blow, and the pneumatic fast cut valve 7 of nitrogen injection control valve group 4 is automatic with closing oxygen point interlocking
It opens, starts the nitrogen-blow into gas piping 1, nitrogen bare flow is also 5000Nm3/ h, flow are controlled by flow control valve 8
System；2 on-line real-time measuremen of laser gas analyzer analyze coal gas composition, if oxygen rifle carry rifle terminate blow the 60s times in one
Straight CO≤9% and O2≤ 6%, then after terminating blowing delay 60s, pneumatic fast cut valve 7 is automatically closed；
If 3) rifle starts to blow under converter oxygen gun, the CO and O that detect2The two is simultaneously all beyond permissible value, and wherein
At least 1 exceeds permissible value≤20%, then calculates the nitrogen flow for needing to be blown by converter second control system 3, from
Autocontrol system adjusts the flow control valve 8 in nitrogen injection valve group 4 in real time, increases to CO, O in coal gas of converter2It is dilute
It releases, so as to reduce coal gas of converter venting of dust explosion.The nitrogen injection end time is to detect CO or O2After gas content exceeds permissible value, then
It is secondary CO≤9% and O occur2≤ 6% time point is initial point, is delayed after 90s, pneumatic fast cut valve 7 is automatically closed；If oxygen rifle carries
Rifle terminates blowing and identical abnormal conditions occurs, to occur CO≤9% and O again2≤ 6% time point is initial point, and be delayed 60s
Afterwards, pneumatic fast cut valve 7 is automatically closed；
If 4) starting to blow and terminating CO and O that duration of blast section detects2The two all exceeds permissible value simultaneously, and
All>20%, then automatic control system directly close wet electric precipitator high voltage electric field, avoid venting of dust explosion.
Claims (2)
1. a kind of automatic control system for preventing converter smelting coal gas venting of dust explosion, which is characterized in that including OG facility exit gas pipes
Road (1), laser gas analyzer (2), nitrogen injection device and converter second control system (3)；Laser gas analyzer (2)
Detection probe is directly installed on OG facility exits gas piping (1), tests and analyzes coal gas of converter composition in real time；In converter two level
Start oxygen blow duration section in converter oxygen gun under conditions of control system (3) control program setting and stopping oxygen blow duration section is set to OG
Apply outlet gas piping (1) interior nitrogen-blow；
The nitrogen injection device includes：Nitrogen injection control valve group (4), nitrogen injection endless tube (5) and intermediate conduit (6),
Nitrogen injection control valve group (4) is connected by intermediate conduit (6) and nitrogen injection endless tube (5), the nitrogen injection endless tube set
(5) on OG facility exits gas piping (1), the multiple injection points of nitrogen injection endless tube set (5) setting are blown into gas piping,
Multiple injection points are circumferentially uniformly distributed；
The converter second control system receives the data that laser gas analyzer (2) transmits, and calculates and passes through nitrogen injection
Control valve group (4) controls the injection flow of nitrogen in real time.
2. according to the system described in claim (1), which is characterized in that the laser gas analyzer (2) is installed on OG and sets
Outlet gas piping (1) leading portion is applied, nitrogen injection endless tube (5) is installed on OG facility exits gas piping (1) back segment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810177062.8A CN108265154A (en) | 2018-03-04 | 2018-03-04 | A kind of automatic control system for preventing converter smelting coal gas venting of dust explosion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810177062.8A CN108265154A (en) | 2018-03-04 | 2018-03-04 | A kind of automatic control system for preventing converter smelting coal gas venting of dust explosion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108265154A true CN108265154A (en) | 2018-07-10 |
Family
ID=62774541
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810177062.8A Pending CN108265154A (en) | 2018-03-04 | 2018-03-04 | A kind of automatic control system for preventing converter smelting coal gas venting of dust explosion |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108265154A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109868337A (en) * | 2019-04-22 | 2019-06-11 | 中冶华天工程技术有限公司 | A method of preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201620173U (en) * | 2009-12-22 | 2010-11-03 | 邯钢集团邯宝钢铁有限公司 | Device for monitoring and controlling recovery of coal gas of convertor |
| CN101892343A (en) * | 2010-07-30 | 2010-11-24 | 中冶南方工程技术有限公司 | Converter gas dry-dedusting system and using method thereof |
| JP2012102367A (en) * | 2010-11-10 | 2012-05-31 | Nippon Steel Corp | Device and method for recovering converter exhaust gas |
| CN103276139A (en) * | 2013-06-09 | 2013-09-04 | 中国重型机械研究院股份公司 | Nitrogen dilution anti-explosion system in dry-method cooling and purifying recovery system for converter gas |
| CN105112602A (en) * | 2015-09-06 | 2015-12-02 | 山东钢铁集团日照有限公司 | All-dry-method converter smoke waste heat and coal gas recycling device and method |
| CN205035421U (en) * | 2015-08-19 | 2016-02-17 | 麦格瑞冶金工程技术（北京）有限公司 | System for reduction converter dry process is removed dust to let out and is exploded |
| CN206799670U (en) * | 2017-05-09 | 2017-12-26 | 江阴兴澄特种钢铁有限公司 | A kind of converter gas exhaust system |
| CN208104457U (en) * | 2018-03-04 | 2018-11-16 | 北京首钢国际工程技术有限公司 | A kind of automatic control system preventing converter smelting coal gas venting of dust explosion |
-
2018
- 2018-03-04 CN CN201810177062.8A patent/CN108265154A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201620173U (en) * | 2009-12-22 | 2010-11-03 | 邯钢集团邯宝钢铁有限公司 | Device for monitoring and controlling recovery of coal gas of convertor |
| CN101892343A (en) * | 2010-07-30 | 2010-11-24 | 中冶南方工程技术有限公司 | Converter gas dry-dedusting system and using method thereof |
| JP2012102367A (en) * | 2010-11-10 | 2012-05-31 | Nippon Steel Corp | Device and method for recovering converter exhaust gas |
| CN103276139A (en) * | 2013-06-09 | 2013-09-04 | 中国重型机械研究院股份公司 | Nitrogen dilution anti-explosion system in dry-method cooling and purifying recovery system for converter gas |
| CN205035421U (en) * | 2015-08-19 | 2016-02-17 | 麦格瑞冶金工程技术（北京）有限公司 | System for reduction converter dry process is removed dust to let out and is exploded |
| CN105112602A (en) * | 2015-09-06 | 2015-12-02 | 山东钢铁集团日照有限公司 | All-dry-method converter smoke waste heat and coal gas recycling device and method |
| CN206799670U (en) * | 2017-05-09 | 2017-12-26 | 江阴兴澄特种钢铁有限公司 | A kind of converter gas exhaust system |
| CN208104457U (en) * | 2018-03-04 | 2018-11-16 | 北京首钢国际工程技术有限公司 | A kind of automatic control system preventing converter smelting coal gas venting of dust explosion |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109868337A (en) * | 2019-04-22 | 2019-06-11 | 中冶华天工程技术有限公司 | A method of preventing once dust collection of converter Wet-electric duster ontology venting of dust explosion |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1316044C (en) | Rotary furnace steelmaking process and end point control system | |
| CN208104457U (en) | A kind of automatic control system preventing converter smelting coal gas venting of dust explosion | |
| CN108265154A (en) | A kind of automatic control system for preventing converter smelting coal gas venting of dust explosion | |
| CN110699527A (en) | Operation method of nitrogen interlocking control system for detecting oxygen content on hot galvanizing vertical annealing furnace | |
| CN112657960A (en) | One set of system that sweeps to denitration export net sampling device | |
| CN101884989A (en) | Method for dredging pressure guiding system by using high-pressure nitrogen backblowing | |
| CN207891371U (en) | A kind of efficient blockage clearing device for converter mouth elementary errors pressure pipeline | |
| WO2021093054A1 (en) | Process device control method and apparatus | |
| CN107841593B (en) | A kind of auxiliary material nitrogen seal device and its control method | |
| CN206161457U (en) | Steel pylons member surface receives testing system of sand blown by wind environment erosion | |
| CN111897027A (en) | Anti-blocking detection cleaning device and method for CEMS probe | |
| CN111500811A (en) | Device and method for automatically inspecting on blast furnace tuyere platform | |
| CN201268691Y (en) | Automatic explosion suppression apparatus of converter gas dry cleaning apparatus | |
| CN114384119B (en) | Method and device for detecting dew point of compressed air in steel plant | |
| CN109239193A (en) | A method of for detecting converter slag | |
| CN206450640U (en) | Gas sample introduction regulating system for dioxin on-line checking | |
| CN110681520B (en) | Quenching tower spray gun dredging device and dredging control method | |
| CN110699504B (en) | Device and method for separating blast furnace gas and sweeping steam | |
| CN103184303A (en) | Self-adaptive regulation control system for oxygen blowing pressure of converter and control method thereof | |
| CN101713005A (en) | Method for blowing-in operation of steel-making blast furnace | |
| CN209841751U (en) | Online real-time detection device for water dew point of gas pipeline | |
| CN113564290B (en) | Monitoring system and method for blast furnace iron notch oxygen lance | |
| CN108384918A (en) | System and method for handling converter splash | |
| CN105180644A (en) | Muffle furnace and furnace pressure control method thereof | |
| US3681052A (en) | Method for controlling the treatment of exhaust gases in oxygen top-blowing converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180710 |