CN108588324B - Pneumatic steelmaking passes through CO2The method that (FeO) and dust generate in high-intensitive input control slag - Google Patents

Pneumatic steelmaking passes through CO2The method that (FeO) and dust generate in high-intensitive input control slag Download PDF

Info

Publication number
CN108588324B
CN108588324B CN201810668801.3A CN201810668801A CN108588324B CN 108588324 B CN108588324 B CN 108588324B CN 201810668801 A CN201810668801 A CN 201810668801A CN 108588324 B CN108588324 B CN 108588324B
Authority
CN
China
Prior art keywords
blowing
blown
intensitive
target
flow
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.)
Active
Application number
CN201810668801.3A
Other languages
Chinese (zh)
Other versions
CN108588324A (en
Inventor
朱荣
魏光升
韩宝臣
董凯
刘润藻
吴学涛
武文合
唐天平
冯超
姜娟娟
董建锋
彭玉华
田博涵
吕明
王云
胡绍岩
李伟峰
朱长富
苏荣芳
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
University of Science and Technology Beijing USTB
Original Assignee
University of Science and Technology Beijing USTB
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by University of Science and Technology Beijing USTB filed Critical University of Science and Technology Beijing USTB
Priority to CN201810668801.3A priority Critical patent/CN108588324B/en
Publication of CN108588324A publication Critical patent/CN108588324A/en
Application granted granted Critical
Publication of CN108588324B publication Critical patent/CN108588324B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

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
    • C21C5/30—Regulating or controlling the blowing
    • 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
    • C21C5/36—Processes yielding slags of special composition

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Carbon Steel Or Casting Steel Manufacturing (AREA)

Abstract

The present invention relates to process for making technical fields more particularly to a kind of pneumatic steelmaking to pass through CO2The method that (FeO) and dust generate in high-intensitive input control slag, is suitable for 30~400t convertor steelmaking process.During bessemerizing, according to raw material parameter, the parameters such as combining target heating rate, target carbon content, molten bath surplus heat predict that melt tank reaction feature determines heat CO by real-time monitoring composition of fumes, molten steel temperature and ingredient2High-intensitive flow pattern.The method of the present invention, which can be realized, bessemerizes process CO2High-intensitive input, improve CO2Utilization efficiency is precisely controlled blowing end point molten steel component, regulates and controls (FeO) in slag, improves furnace gas CO concentration, reduces converter dust yield, improves quality of molten steel, reduce production cost.

Description

Pneumatic steelmaking passes through CO2(FeO) and dust generate in high-intensitive input control slag Method
Technical field
The present invention relates to process for making technical fields more particularly to a kind of pneumatic steelmaking to pass through CO2High-intensitive input control The method that (FeO) and dust generate in slag.
Background technique
In recent years, CO2Recycling is applied to steelmaking process and gradually rises, due to CO2Excellent pyroreaction characteristic, can make For the oxidant of steel-making, blender gas and protection gas etc., CO is being realized2, it can be achieved that energy saving and cost lowering and raising molten steel while emission reduction Quality.The application of the technology can get country's relevant policies and support, meets development of iron and steel enterprises interests and country pushes science and technology The theory of innovation, however, there has been no the converter CO of efficient stable at present2Dynamic blowing process for making, realizes CO2High intensity input Meanwhile guaranteeing to bessemerize the completion of task, improve every technical-economic index.
Chinese patent CN 200810104127.2 discloses a kind of using CO2Gas reduces the method that fume from steel making generates, By a small amount of CO2It is blended into oxygen jet, reduces certain soot emissions, but this method only provides a kind of static blowing Model, it is difficult to efficiently use CO2Or by CO2Advantage play to maximum.
Chinese patent CN 200510011478.5 discloses a kind of blowing CO2The electric steelmaking process of gas, utilizes CO2Generation For partial oxidation as the gas for smelting molten steel, reduces the scaling loss of metal, reduce production cost, however the technique is equally not Accurate and strong moral conduct flow pattern is provided, therefore blowing end point molten steel component cannot be prejudged accurately, quality of molten steel is difficult To guarantee.
Therefore how CO is formulated2High-intensitive blowing process, while guaranteeing the effect that blows, control accurate smelting index will be at For CO2Can large-scale application in the critical issue of steel-making.
Summary of the invention
In view of the above-mentioned problems, the present invention proposes that a kind of pneumatic steelmaking passes through CO2(FeO) and powder in high-intensitive input control slag The method that dirt generates, during bessemerizing, according to raw material parameter, combining target heating rate, target carbon content, molten bath are rich The parameters such as excess heat predict that melt tank reaction feature determines the heat by real-time monitoring composition of fumes, molten steel temperature and ingredient CO2High-intensitive flow pattern carries out proportion mixing to injecting mixed gas online, and dynamic adjusts injection parameter, realizes in slag (FeO), the control accurate that dust generates reduces production cost, improves quality of molten steel.
The present invention is achieved by the following technical solutions:
A kind of pneumatic steelmaking passes through CO2The method that (FeO) and dust generate in high-intensitive input control slag, is being bessemerized In the process, according to raw material parameter, the parameters such as combining target heating rate, target carbon content, molten bath surplus heat, to required blowing Ratio of gas mixture and flow are calculated and complete to match online, by real-time monitoring composition of fumes, molten steel temperature and ingredient, Determine the CO of converting process2High-intensitive inputting process parameters realize CO2High-intensitive blowing, control accurate molten steel component reduces Production cost；
Further, the injecting mixed gas is CO2-O2Gaseous mixture or CO2-O2Vapor；
Further, the method bessemerizes process suitable for 30~400t.
Further, the method specifically includes the following steps:
1) acquisition of raw material parameter: converter raw material parameter collection module acquires feed stock for blast furnace parameter, the raw material parameter packet Include hot metal composition and additional amount, molten iron temperature, steel scrap ingredient and additional amount, slag material type and additional amount；
2) setting of target component: blowing object parameter data library is according to the target molten steel for smelting steel grade setting blowing end point Pre- period parameters, the target component include target heating rate, target decarbonization rate, target molten steel oxygen content, target molten steel phosphorus Content；
3) Index Content of real-time monitoring: monitoring system the real time measure smelting index content, the index of the real-time monitoring Content includes molten steel component variation, molten steel temperature variation, composition of fumes, dust concentration；
4)CO2The determination of injection parameters: according to step 1), 2) and 3) in obtain raw material parameter, target component and The index of real-time monitoring, CO2Injection parameter computing module is based on material balance and energy balance and real-time detection index to blowing Refine each stage CO2Blowing ratio and flow are calculated: (1) slag-formation period that heats up, determines CO according to target heating rate2Highest spray Ratio and flow are blown, while meeting heating slugging requirement, reduces dust yield, guarantees that the period dephosphorization is in suitable Temperature range；(2) quick carbon period determines CO according to target decarbonization rate2Highest is blown proportional flow, in quick decarburization liter While warm, enhance melting bath stirring ability, improves CO concentration in furnace gas；(3) blowing end point control period, according to molten bath surplus heat And blowing end point molten steel component, determine CO2Highest is blown proportional flow, reduces in slag (FeO), improves recovery rate of iron；
5) top-blown gas on-line mixing matches: top-blown gas on-line mixing matching system is according to blowing process system in step 4) The calculated result of cover half block completes the on-line mixing of top-blown gas, with when switching, and mixed uniformly top-blown gas is injected and is pushed up Blowpipe road；
6) each phased mission that blows is completed: before starting blowing, CO2Blowing process is formulated module starting top-blown gas and is mixed online Matching system and air supply system are closed, according to CO2Injection parameters control spray gun to molten bath injecting mixed gas, carry out each rank Section blowing；
7) blowing task terminates: top-blown gas on-line mixing matching system and air supply system are in CO2Blowing process formulates mould Block effect is lower to stop the blowing of converter spray gun, and converting process terminates, and spray gun resets, and next furnace is waited to blow.
Further, each stage CO2Injection parameters control are as follows: (1) it heats up slag-formation period, target heating rate 15~30 DEG C/min, then CO2Blowing ratio 10~25%, CO2It is blown 10~50Nm of flow3/(h·t)；(2) quick carbon period, Target decarbonization rate 0.2~0.8% [C]/min, CO2Blowing ratio 3~15%, CO2It is blown 5~30Nm of flow3/(h·t)； (3) blowing end point control period, molten bath surplus heat 0.83~1.67MJ/t steel, CO2Blowing ratio 30~60%, CO2Blowing stream Measure 60~120Nm3/(h·t)；Molten bath surplus heat 1.67~2.67MJ/t steel, CO2Blowing ratio 60~90%, CO2Blowing 120~180Nm of flow3/(h·t)；Molten bath surplus heat 2.67~3.33MJ/t steel, CO2Blowing ratio 90~100%, CO2 It is blown 180~200Nm of flow3/(h·t)。
Further, the method is applied to CO2High-intensitive injection system, the CO2High-intensitive injection system includes control System, monitoring system, air supply system, top-blown gas match hybrid system, gas source, spray gun online；The control system includes to turn Furnace raw material parameter collection module, blowing object parameter data library, CO2Injection parameter computing module, blowing process formulate module；
Feed stock for blast furnace parameter is acquired according to the converter raw material parameter collection module, blowing object parameter data library is set The pre- period parameters of target molten steel and monitoring system the real time measure smelting index content, the CO2Injection parameter computing module is based on Material balance and energy balance are in each stage CO of line computation blowing2Blowing ratio and flow.
Further, the blowing process formulates module for determining converting process CO2High-intensitive injection parameters, institute State CO2High-intensitive injection parameters include CO in injecting mixed gas2Mixed proportion and CO2Input flow rate；And the spray Blow moulding formulates module and completes CO by control top-blown gas on-line mixing matching system and air supply system2High-intensitive dynamic is sprayed It blows.
Further, the top-blown gas on-line mixing matching system is used for according to the CO2Injection parameter computing module The calculated result for formulating module with blowing process completes the on-line mixing proportion of blowing gas.
Advantageous effects of the invention:
The method of the invention, which can be realized, bessemerizes process CO2High-intensitive input, improve CO2Utilization efficiency, precisely Blowing end point molten steel component is controlled, regulates and controls (FeO) in slag, improves furnace gas CO concentration, reduces converter dust yield, improve molten steel Quality reduces production cost.
Detailed description of the invention
Fig. 1 is pneumatic steelmaking CO of the present invention2The control logic block diagram that (FeO) and dust generate in high-intensitive input control slag
Specific embodiment
In order to make the objectives, technical solutions, and advantages of the present invention clearer, with reference to embodiments, to the present invention It is explained in further detail.It should be appreciated that specific embodiment described herein is used only for explaining the present invention, it is not used to Limit the present invention.
On the contrary, the present invention covers any substitution done on the essence and scope of the present invention being defined by the claims, repairs Change, equivalent method and scheme.Further, in order to make the public have a better understanding the present invention, below to of the invention thin It is detailed to describe some specific detail sections in section description.Part without these details for a person skilled in the art The present invention can also be understood completely in description.
Embodiment
A kind of pneumatic steelmaking passes through CO2The method that (FeO) and dust generate in high-intensitive input control slag, is being bessemerized In the process, according to raw material parameter, the pre- period parameters such as combining target heating rate, target carbon content, molten bath surplus heat, to required Injecting mixed gas ratio and flow are calculated and complete to match online, by real-time monitoring composition of fumes, molten steel temperature and Ingredient determines the CO of converting process2High-intensitive inputting process parameters realize converter CO2High-intensitive blowing, control accurate molten steel Ingredient reduces production cost；
In the present embodiment, the method is applied to 300t pneumatic steelmaking, and top blow oxygen lance is blown CO2-O2Mixed gas is mixed It closes gas jet and directly contacts molten bath completion blowing, the method specifically:
1) acquisition of raw material parameter: converter raw material parameter collection module obtains feed stock for blast furnace parameter, the raw material parameter packet Include hot metal composition and additional amount, molten iron temperature, steel scrap ingredient and additional amount, slag material type and additional amount, specific value such as table 1 With 2；
1 converter metal charge parameter of table
Raw material C/% Si/% Mn/% P/% S/% Temperature/DEG C Additional amount/ton
Steel scrap 0.1 0.05 0.20 0.015 0.010 25 292.4
Molten iron 4.34 0.15 0.17 0.117 0.013 1350 26.98
2 converter auxiliary material parameter of table/%
Title CaO SiO2 MgO Al2O3 CaS Fe2O3 MnO CaF2 Caustic soda
High calcium lime 95.41 0.86 1.92 0 0.045 —— —— —— 1.25
Ore 11.19 5.45 1.73 1.85 0.063 79.70 1.50 —— ——
Fluorite —— 4.01 —— —— 0.09 —— —— 91.36 ——
Light dolomite 50.84 2.17 37.46 —— 0.20 —— —— —— 8.33
2) setting of target component: blowing object parameter data library is according to the target molten steel for smelting steel grade setting blowing end point Pre- period parameters, the target component include 25 DEG C/min of target heating rate, target decarbonization rate 0.45%/min, target molten steel Oxygen content 0.04%, target molten steel phosphorus content 0.012%；
3) Index Content of real-time monitoring: monitoring system the real time measure smelting index content, the index of the real-time monitoring Content includes molten steel component variation, molten steel temperature variation, composition of fumes, dust concentration；
4)CO2The determination of injection parameters: according to step 1), 2) and 3) in obtain raw material parameter, target component and The index of real-time monitoring, CO2Injection parameter computing module is based on material balance and energy balance and real-time detection index to blowing Refine each stage CO2Blowing ratio and flow are calculated: (1) slag-formation period that heats up, determines CO according to target heating rate2Highest spray Blowing ratio is 18%, flow 36Nm3/ (ht) reduces dust yield, guarantees while meeting heating slugging requirement The period dephosphorization is in suitable temperature range；(2) quick carbon period determines CO according to target decarbonization rate2Highest is blown ratio Example 6%, flow 12Nm3/ (ht) enhances melting bath stirring ability while quick decarburization heating, and it is dense to improve CO in furnace gas Degree；(3) blowing end point control period, under the premise of guaranteeing tapping temperature, molten bath surplus heat 1.063MJ/t steel, CO2Blowing ratio Example 39%, CO2It is blown flow 78Nm3/(h·t)；It reduces in slag (FeO), improves recovery rate of iron；
5) top-blown gas on-line mixing matches: top-blown gas on-line mixing matching system is according to blowing process system in step 4) The calculated result of cover half block completes the on-line mixing of top-blown gas, with when switching, and mixed uniformly top-blown gas is injected and is pushed up Blowpipe road；
6) each phased mission that blows is completed: before starting blowing, CO2Blowing process is formulated module starting top-blown gas and is mixed online Matching system and air supply system are closed, according to CO2Injection parameters control spray gun to molten bath injecting mixed gas, carry out each rank Section blowing；
7) blowing task terminates: top-blown gas on-line mixing matching system and air supply system are in CO2Blowing process formulates mould Block effect is lower to stop the blowing of converter spray gun, and converting process terminates, and spray gun resets, and next furnace is waited to blow.
After the method for the invention, reach outside target in guarantee molten steel component and temperature, (FeO) is reduced in slag 1.5% (mass percent), CO concentration improves 6.3% (percentage by volume) in furnace gas, and dust concentration reduces 9g/m3。

Claims (5)

1. a kind of pneumatic steelmaking passes through CO2The method that (FeO) and dust generate in high-intensitive input control slag, which is characterized in that During bessemerizing, according to raw material parameter, combining target heating rate, target carbon content, molten bath surplus heat parameter, prediction Melt tank reaction feature determines heat CO by real-time monitoring composition of fumes, molten steel temperature and ingredient2High-intensitive flow pattern, Realize the control accurate that (FeO) in slag, dust are generated；
Its characterization step is as follows:
1) acquisition of raw material parameter: converter raw material parameter collection module acquires feed stock for blast furnace parameter, and the raw material parameter includes iron Water constituent and additional amount, molten iron temperature, steel scrap ingredient and additional amount, slag material type and additional amount；
2) setting of target component: blowing object parameter data library is expected according to the target molten steel for smelting steel grade setting blowing end point Parameter, the target component include target heating rate, target decarbonization rate, target molten steel oxygen content, target molten steel phosphorus content；
3) Index Content of real-time monitoring: monitoring system the real time measure smelting index content, the Index Content of the real-time monitoring Including molten steel component variation, molten steel temperature variation, composition of fumes, dust concentration；
4) CO2The determination of injection parameters: according to step 1), 2) and 3) in the raw material parameter, the target component and in real time that obtain The index of monitoring, CO2It is each to blowing that injection parameter computing module is based on material balance and energy balance and real-time detection index Stage CO2Blowing ratio and flow are calculated: (1) slag-formation period that heats up, determines CO according to target heating rate2Highest is blown ratio Example and flow reduce dust yield, guarantee that the period dephosphorization is in suitable temperature while meeting heating slugging requirement Section；(2) quick carbon period determines CO according to target decarbonization rate2Highest is blown proportional flow, in quick decarburization heating Meanwhile enhancing melting bath stirring ability, improve CO concentration in furnace gas；(3) blowing end point control period, according to molten bath surplus heat and Blowing end point molten steel component, determines CO2Highest is blown proportional flow, reduces in slag (FeO), improves recovery rate of iron；
Blowing process formulates module and calculates acquisition each stage CO of converting process2Injection parameters, each stage CO2Blowing process ginseng Numerical control is made as: (1) it heats up slag-formation period, CO2Blowing ratio 5 ~ 25%, CO2It is blown 10 ~ 50Nm of flow3/( h· t)；(2) quickly de- Carbon phase, CO2Blowing ratio 3 ~ 15%, CO2It is blown 5 ~ 30Nm of flow3/( h·t)；(3) blowing end point control period, CO2Blowing ratio 30 ~ 100%, CO2It is blown 60 ~ 200Nm of flow3/( h·t)；
5) top-blown gas on-line mixing matches: top-blown gas on-line mixing matching system formulates mould according to blowing process in step 4) The calculated result of block completes the on-line mixing of top-blown gas, with when switching, and mixed uniformly top-blown gas is injected top blast pipe Road；
6) each phased mission that blows is completed: before starting blowing, CO2Blowing process is formulated module starting top-blown gas on-line mixing and is matched Than system and air supply system, according to CO2Injection parameters, to molten bath injecting mixed gas, carry out each stage blows control spray gun Refining；
7) blowing task terminates: top-blown gas on-line mixing matching system and air supply system are in CO2Blowing process formulates module effect Lower stopping converter spray gun blowing, converting process terminate, and spray gun resets, and next furnace is waited to blow.
2. a kind of pneumatic steelmaking according to claim 1 passes through CO2(FeO) and dust generate in high-intensitive input control slag Method, which is characterized in that the injecting mixed gas be CO2-O2Gaseous mixture or CO2-O2Vapor.
3. a kind of pneumatic steelmaking according to claim 1 passes through CO2 (FeO) and dust generate in high-intensitive input control slag Method, which is characterized in that each stage CO2Injection parameters control are as follows: (1) it heats up slag-formation period, target heating rate 15 ~ 30 DEG C/min, then CO2Blowing ratio 10 ~ 25%, CO2It is blown 10 ~ 50Nm of flow3/( h·t)；(2) quick carbon period, target decarburization Rate 0.2 ~ 0.8% [C]/min, CO2Blowing ratio 3 ~ 15%, CO2It is blown 5 ~ 30Nm of flow3/( h·t)；(3) blowing end point control Phase processed, molten bath surplus heat 0.83 ~ 1.67MJ/t steel, CO2Blowing ratio 30 ~ 60%, CO2It is blown 60 ~ 120Nm of flow3/( h· t)；Molten bath surplus heat 1.67 ~ 2.67MJ/t steel, CO2Blowing ratio 60 ~ 90%, CO2It is blown 120 ~ 180Nm of flow3/( h· t)；Molten bath surplus heat 2.67 ~ 3.33MJ/t steel, CO2Blowing ratio 90 ~ 100%, CO2It is blown 180 ~ 200Nm of flow3/( h· t)。
4. a kind of pneumatic steelmaking according to claim 1 passes through CO2(FeO) and dust generate in high-intensitive input control slag Method, which is characterized in that the method be applied to CO2High-intensitive injection system, the CO2High-intensitive injection system includes control System processed, monitoring system, air supply system, top-blown gas match hybrid system, gas source, spray gun online；The control system includes Converter raw material parameter collection module, blowing object parameter data library, CO2Injection parameter computing module, blowing process formulate module；
The target of feed stock for blast furnace parameter, the setting of blowing object parameter data library is acquired according to the converter raw material parameter collection module The pre- period parameters of molten steel and monitoring system the real time measure smelting index content, the CO2Injection parameter computing module is based on material Balance and energy balance are in each stage CO of line computation blowing2Blowing ratio and flow；
The blowing process formulates module for determining converting process CO2High-intensitive injection parameters, the CO2High intensity spray Blow moulding parameter includes CO in injecting mixed gas2Mixed proportion and CO2Input flow rate；And the blowing process formulates module CO is completed by control top-blown gas on-line mixing matching system and air supply system2High-intensitive dynamic is blown；
The top-blown gas on-line mixing matching system is used for according to the CO2Injection parameter computing module and blowing process are formulated The calculated result of module completes the on-line mixing proportion of blowing gas.
5. a kind of pneumatic steelmaking according to claim 1 passes through CO2(FeO) and dust generate in high-intensitive input control slag Method, which is characterized in that the method be suitable for 30 ~ 400t bessemerize process.
CN201810668801.3A 2018-06-26 2018-06-26 Pneumatic steelmaking passes through CO2The method that (FeO) and dust generate in high-intensitive input control slag Active CN108588324B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201810668801.3A CN108588324B (en) 2018-06-26 2018-06-26 Pneumatic steelmaking passes through CO2The method that (FeO) and dust generate in high-intensitive input control slag

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201810668801.3A CN108588324B (en) 2018-06-26 2018-06-26 Pneumatic steelmaking passes through CO2The method that (FeO) and dust generate in high-intensitive input control slag

Publications (2)

Publication Number Publication Date
CN108588324A CN108588324A (en) 2018-09-28
CN108588324B true CN108588324B (en) 2019-04-26

Family

ID=63634304

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201810668801.3A Active CN108588324B (en) 2018-06-26 2018-06-26 Pneumatic steelmaking passes through CO2The method that (FeO) and dust generate in high-intensitive input control slag

Country Status (1)

Country Link
CN (1) CN108588324B (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114854929B (en) * 2022-05-07 2023-03-17 北京科技大学 Converter blowing CO 2 Method for dynamically predicting molten steel components and temperature in real time
CN115927784B (en) * 2022-11-30 2023-07-14 北京科技大学 Based on CO 2 Converter steelmaking end point control method by dynamic mixed blowing

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101476014B (en) * 2009-02-06 2010-09-29 北京北科创新科技发展有限公司 Whole process dynamic monitoring method for converter steel melting
CN101845531B (en) * 2010-05-07 2011-11-02 河北省首钢迁安钢铁有限责任公司 Converter smelting endpoint molten steel carbon and temperature control system and method thereof
CN107893142A (en) * 2017-11-29 2018-04-10 扬州高立达科技产业有限公司 The control method that two kinds of gases of steelmaking converter top blast accurately mix

Also Published As

Publication number Publication date
CN108588324A (en) 2018-09-28

Similar Documents

Publication Publication Date Title
CN102660658B (en) Method for curing converter slag
CN110804684B (en) CO converter2-O2Dynamic control method for temperature of mixed blowing smelting fire point area
CN105525055B (en) A kind of control method of converter less-slag melting carbon period splash
CN106282487B (en) A kind of pre-dephosporizing method for molten iron
CN103773919B (en) Method for smelting middle-high phosphorus molten iron in converter
CN109321704B (en) Smelting method for reducing phosphorus content of smelting final slag by slag splashing furnace protection
CN102505062B (en) Converter rapid desilicification and dephosphorization pretreatment method
CN105112599B (en) A kind of ultra-low phosphoretic steel smelting process
CN103361461A (en) Method for performing online prediction and control on phosphorus content of low-carbon steel smelted by converter
CN108588324B (en) Pneumatic steelmaking passes through CO2The method that (FeO) and dust generate in high-intensitive input control slag
CN108647407A (en) A kind of pneumatic steelmaking flue gas analysis carbon determination method
CN106702069A (en) Method for producing low phosphorus, low sulfur and ultra-low carbon steel
CN105950826B (en) A kind of ladle refining furnace refining slag deoxidier and its application method
CN105132611B (en) Method for producing ultra-low phosphorous steel through single slag of converter
Kumakura Advances in steel refining technology and future prospects
CN106978517B (en) Modify the method and apparatus that converter emission coal gas recycling is applied to steel-making bottom blowing
CN104263875B (en) A kind of top blown converter adopts high phosphorus hot metal to produce the dephosphorizing method of alloy bonding wire steel
CN102051444A (en) Desulfurizing method of ladle refining furnace and desulfurizing method used for slab-grade steel
CN102146493B (en) Method for smelting clean steel in electromagnetic induction furnace by blowing CO2
CN103757173B (en) The converter steel making method of low lime consumption
CN108085449A (en) The method of the double slag production ultra-low phosphoretic steels of converter
CN208517458U (en) A kind of LF furnace dynamic bottom blowing CO2- Ar purifier system
CN101250606A (en) Method for reducing dust of steel mill by using CO2
CN114672607B (en) Method for online reduction of iron oxide by converter deslagging
CN107574281A (en) The method that Low-phosphorus Steel or extremely low phosphoretic steel are produced with slagging with Lime stone single slag process

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
GR01 Patent grant
GR01 Patent grant