CN108660279A - Improve the process for making and HRB400 steel of molten steel recovery rate - Google Patents
Improve the process for making and HRB400 steel of molten steel recovery rate Download PDFInfo
- Publication number
- CN108660279A CN108660279A CN201810390278.2A CN201810390278A CN108660279A CN 108660279 A CN108660279 A CN 108660279A CN 201810390278 A CN201810390278 A CN 201810390278A CN 108660279 A CN108660279 A CN 108660279A
- Authority
- CN
- China
- Prior art keywords
- steel
- liquid
- making
- ladle
- weight
- 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
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
- C21C7/00—Treating molten ferrous alloys, e.g. steel, not covered by groups C21C1/00 - C21C5/00
- C21C7/04—Removing impurities by adding a treating agent
- C21C7/06—Deoxidising, e.g. killing
-
- 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
Abstract
The invention discloses a kind of process for making improving molten steel recovery rate：1) by steel scrap, molten iron according to 1：It is blown to obtain after 46 weight proportion mixing and just makes steel liquid, and the just steel-making liquid is tapped into ladle；2) wait for that technic index meets：Argon flow amount is 150 200m3/ h simultaneously reaches distance >=500mm of the liquid level of the weight % of carbon content in 180 250 DEG C and the just steel-making liquid≤0.25, the just steel-making liquid at the top of the ladle to the bottom baking temperature of 150 200s of just steel-making liquid Argon, the ladle, discarded steel disk volume is added into the just steel-making liquid and carries out molten melting, 40 60min of refining, then casts.This is simple for process, cost-effective, reduces production iron loss, to realize the purpose for reducing converter blow loss, improving molten steel recovery rate increase production capacity.
Description
Technical field
The present invention relates to field of steel-making, and in particular, to a kind of process for making and HRB400 improving molten steel recovery rate
Steel.
Background technology
In recent years with the fluctuation in screw-thread steel market, domestic major steel mill is to realize HRB400 steel profit, how
Reduce iron and steel stock, improve molten steel recovery rate etc. makes related work.It is well known that molten steel recovery rate is the one of converter producing
One of the main body of the important integrated technology index of item and converter cost structure.To improve converter molten steel recovery rate, each steel mill is confused
It is confused to propose improvement converting process, converter splash number is reduced, it is horizontal to improve operation；Strengthening smelting improves a catch carbon hit
Rate, strengthening Bottom Argon Stirring reduces finishing slag (FeO) content and clinker band iron；Increase iron content cold burden dosage, reinforce working of a furnace management,
Reduce the related measures such as fettling number.Since Fe, O reaction certainly will be had during bessemerizing, which kind of work no matter taken
Skill can all cause the steel technology of 8%-10%.The blow loss of our factory converter at present about 8% or so thereby results in about 11 tons/stove
Iron and steel stock loses.In order to further increase HRB400 steel molten steel recovery rates, our factory is groped by continuous technique, it is proposed that converter
Ladle adds HRB400 steel wire rod techniques after stove.It was verified that in HRB400 steel production processes, steel after converter tapping
A certain amount of discarded HRB400 steel disks volume is added in packet, can largely improve molten steel recovery rate, reach and improve production capacity, reduce life
Produce the purpose of cost.
Invention content
The object of the present invention is to provide a kind of process for making and HRB400 steel improving molten steel recovery rate, process for making letters
It is single, cost-effective, reduce production iron loss, to realize the purpose for reducing converter blow loss, improving molten steel recovery rate increase production capacity.
To achieve the goals above, the present invention provides a kind of process for making improving molten steel recovery rate, including：
1) by steel scrap, molten iron according to 1：It is blown to obtain after the weight proportion mixing of 4-6 and just makes steel liquid, and will be described first
Steel-making liquid is tapped into ladle；
2) when technic index meets the following conditions, discarded steel disk volume progress melting is added into the just steel-making liquid and obtains
To melting liquid：
The technic index is：Argon flow amount is 150-200m3/ h and to the just steel-making liquid Argon 150-200s, described
The bottom baking temperature of ladle reaches the weight % of carbon content≤0.25, the just steel-making in 180-250 DEG C and the just steel-making liquid
Distance >=500mm of the liquid level of liquid at the top of the ladle；
3) the melting liquid is placed in refining converter, when converter temperature reaches 1640-1730 DEG C, to the melting liquid
Middle addition slag former and deoxidier carry out refining 40-60min, then cast.
HRB400 steel made from a kind of above-mentioned process for making is additionally provided in the present invention.
Through the above technical solutions, selecting steel scrap, molten iron according to 1 in the present invention：It is blown after the weight proportion mixing of 4-6
Refining obtains just making steel liquid, and technic index control is existed：Argon flow amount is 150-200m3/ h simultaneously just makes steel liquid Argon to described
150-200s, the ladle bottom baking temperature reach the weight of carbon content≤0.25 in 180-250 DEG C and the just steel-making liquid
Amount %, the liquid level for just making steel liquid add the useless of constant weight proportioning under distance >=500mm at the top of the ladle
The steel disk volume abandoned carries out melting and obtains melting liquid, adds deoxidier and is refined, casts to obtain HRB400 steel.In specific work
Under the conditions of skill, just steel-making liquid tapping after add steel disk volume, hence it is evident that improve molten steel recovery rate simultaneously, realize reduction iron loss
It has saved cost and has improved production capacity.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Specific implementation mode
The specific implementation mode of the present invention is described in detail with reference to embodiments.It should be understood that this place
The specific implementation mode of description is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
The present invention provides a kind of process for making improving molten steel recovery rate, including：
1) by steel scrap, molten iron according to 1：It is blown to obtain after the weight proportion mixing of 4-6 and just makes steel liquid, and will be described first
Steel-making liquid is tapped into ladle；
2) when technic index meets the following conditions, discarded steel disk volume progress melting is added into the just steel-making liquid and obtains
To melting liquid：
The technic index is：Argon flow amount is 150-200m3/ h and to the just steel-making liquid Argon 150-200s, described
The bottom baking temperature of ladle reaches the weight % of carbon content≤0.25, the just steel-making in 180-250 DEG C and the just steel-making liquid
Distance >=500mm of the liquid level of liquid at the top of the ladle；
3) the melting liquid is placed in refining converter, when converter temperature reaches 1640-1730 DEG C, to the melting liquid
Middle addition slag former and deoxidier carry out refining 40-60min, then cast.
In above-mentioned technical proposal, the condition of the blowing can select in a wide range, but in order to improve blowing effect
Fruit, it is preferable that the blowing at least meets the following conditions：Temperature is 1600-1800 DEG C, time 6-10h.
In above-mentioned technical proposal, the condition of the melting can select in a wide range, but in order to improve melting effect
Fruit, it is preferable that the smelting temperature is 1650-1750 DEG C.
In above-mentioned technical proposal, the amount for the steel scrap volume being added can select in a wide range, but in order to improve steel
Water recovery rate, it is preferable that the weight proportion of the steel scrap volume and the molten iron is 1：22.8-46.3.
In above-mentioned technical proposal, the amount of the steel scrap, slag former and the deoxidier that are added can select in a wide range, but
It is to improve molten steel recovery rate, it is preferable that the steel scrap, slag former and the weight proportion of deoxidation are 1：0.03-0.05：
0.026-0.46。
In above-mentioned technical proposal, the type of added slag former can select in a wide range, but in order to improve molten steel
Recovery rate, it is preferable that the slag former is by 1：The lime and refining slag of 0.125-0.19 weight ratios form.
In above-mentioned technical proposal, the type of added slag former can select in a wide range, but in order to improve molten steel
Recovery rate, it is preferable that the refining slag is by CaO, SiO2And Al2O3According to 1：0.05-0.06：The weight proportion group of 0.6-0.7
At.
In above-mentioned technical proposal, the specification of the albarium in added slag former can select in a wide range, but be
Improve steel-making effect, it is preferable that the weight % of the content of CaO in the lime >=85, and activity degree >=250mL.
In above-mentioned technical proposal, the type of institute's killing can select in a wide range, but in order to improve steel-making
Effect, it is preferable that the deoxidier is one or more in aluminium ingot, ferromanganese, aluminum steel, aluminium powder and ferrosilicon powder.
HRB400 steel made from a kind of above-mentioned process for making is additionally provided in the present invention.
The specific implementation mode of the present invention is described in detail by the following examples.
Embodiment 1
1) by steel scrap, molten iron according to 1：4 obtain just making steel liquid than the 10h that blows at 1600 DEG C after mixing, and are just refined described
Molten steel is tapped into ladle；
2) when technic index meets the following conditions, be added into the just steel-making liquid discarded steel disk volume (steel scrap roll up with
The weight proportion of the molten iron is 1：22.8) melting is carried out at 1650 DEG C obtain melting liquid：
The technic index is：Argon flow amount is 150m3/ h and to the bottom of the just steel-making liquid Argon 200s, the ladle
Portion's baking temperature reaches the liquid level distance of the weight % of carbon content≤0.25, the just steel-making liquid in 185 DEG C and the just steel-making liquid
Distance >=500mm at the top of the ladle；
3) the melting liquid is placed in refining converter, when converter temperature reaches 1645 DEG C, is added into the melting liquid
Enter slag former and deoxidier carries out refining 40min, then casting is made HRB400 steel, is denoted as A1；
Wherein, the refining slag is by CaO, SiO2And Al2O3According to 1：0.05：0.6 weight proportion forms and the slag making
Agent is by 1：The lime and refining slag of 0.125 weight ratio form.
Embodiment 2
1) by steel scrap, molten iron according to 1：The 8h that blows at 1700 DEG C after 5 weight proportion mixing obtains just making steel liquid, and by institute
Just steel-making liquid is stated to tap into ladle；
2) when technic index meets the following conditions, be added into the just steel-making liquid discarded steel disk volume (steel scrap roll up with
The weight proportion of the molten iron is 1：33) melting is carried out at 1700 DEG C obtain melting liquid：
The technic index is：Argon flow amount is 150-200m3/ h simultaneously just makes steel liquid Argon 180s, the ladle to described
Bottom baking temperature reach the liquid level of the weight % of carbon content≤0.25, the just steel-making liquid in 200 DEG C and the just steel-making liquid
Distance >=500mm at the top of the ladle；
3) the melting liquid is placed in refining converter, when converter temperature reaches 1670 DEG C, is added into the melting liquid
Enter slag former and deoxidier carries out refining 40-60min, then casting is made HRB400 steel, is denoted as A2；
Wherein, the refining slag is by CaO, SiO2And Al2O3According to 1：0.055：It 0.65 weight proportion composition and described makes
Slag agent is by 1：The lime and refining slag of 0.15 weight ratio form.
Embodiment 3
1) by steel scrap, molten iron according to 1：The 6h that blows at 1800 DEG C after 6 weight proportion mixing obtains just making steel liquid, and by institute
Just steel-making liquid is stated to tap into ladle；
2) when technic index meets the following conditions, be added into the just steel-making liquid discarded steel disk volume (steel scrap roll up with
The weight proportion of the molten iron is 1：46.3) melting is carried out at 1750 DEG C obtain melting liquid：
The technic index is：Argon flow amount is 200m3/ h and to the bottom of the just steel-making liquid Argon 150s, the ladle
Portion's baking temperature reaches the liquid level distance of the weight % of carbon content≤0.25, the just steel-making liquid in 250 DEG C and the just steel-making liquid
Distance >=500mm at the top of the ladle；
3) the melting liquid is placed in refining converter, when converter temperature reaches 1724 DEG C, is added into the melting liquid
Enter slag former and deoxidier carries out refining 40-60min, then casting is made HRB400 steel, is denoted as A3；
Wherein, the refining slag is by CaO, SiO2And Al2O3According to 1：0.06：0.7 weight proportion forms and the slag making
Agent is by 1：The lime and refining slag of 0.19 weight ratio form.
Comparative example 1
HRB400 steel is prepared Following the procedure of Example 1, is denoted as D1；Unlike, steel disk volume is not added.
Comparative example 2
HRB400 steel is prepared Following the procedure of Example 1, is denoted as D2；Unlike, steel disk volume is not added.
Comparative example 3
HRB400 steel is prepared Following the procedure of Example 1, is denoted as D3；Unlike, steel disk volume is not added.
Comparative example 4
HRB400 steel is prepared Following the procedure of Example 1, is denoted as D4；The difference is that the weight proportion of the steel scrap, molten iron
It is 1：3.5.
Comparative example 5
HRB400 steel is prepared Following the procedure of Example 1, is denoted as D5；The difference is that the weight proportion of the steel scrap, molten iron
It is 1：6.5.
Comparative example 6
HRB400 steel is prepared Following the procedure of Example 1, is denoted as D6；Unlike, the bottom baking temperature of the ladle
It is 170 DEG C.
Comparative example 7
HRB400 steel is prepared Following the procedure of Example 1, is denoted as D7；Unlike, carbon content is in the just steel-making liquid
3%.
Molten steel recovery rate concrete outcome is shown in Table 1 in above-described embodiment and comparative example：
Table 1
| The weight proportion of steel scrap volume/molten iron | Molten steel recovery rate (%) | |
| A1 | 1：22.8 | 96.5 |
| A2 | 1：33 | 96.7 |
| A3 | 1：46.3 | 97.8 |
| D1 | 1：22.8 | 92.5 |
| D2 | 1：33 | 92.4 |
| D3 | 1：46.3 | 93.6 |
| D4 | 1：22.8 | 89.2 |
| D5 | 1：22.8 | 96.1 |
| D6 | 1：22.8 | 95.9 |
| D7 | 1：22.8 | 93.7 |
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail can carry out a variety of simple variants to technical scheme of the present invention within the scope of the technical concept of the present invention, this
A little simple variants all belong to the scope of protection of the present invention.It is further to note that described in above-mentioned specific implementation mode
Each particular technique feature can be combined by any suitable means, in order to avoid not in the case of no contradiction
Necessary repetition, the present invention no longer separately illustrate various combinations of possible ways.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (10)
1. a kind of process for making improving molten steel recovery rate, which is characterized in that including：
1) by steel scrap, molten iron according to 1：It is blown to obtain after the weight proportion mixing of 4-6 and just makes steel liquid, and just made steel described
Liquid is tapped into ladle；
2) when technic index meets the following conditions, discarded steel disk volume progress melting is added into the just steel-making liquid and is melted
Refine liquid：
The technic index is：Argon flow amount is 150-200m3/ h simultaneously just makes steel liquid Argon 150-200s, the ladle to described
Bottom baking temperature reach the weight % of carbon content≤0.25 in 180-250 DEG C and the just steel-making liquid, the just steel-making liquid
Distance >=500mm of the liquid level at the top of the ladle；
3) the melting liquid is placed in refining converter, when converter temperature reaches 1640-1730 DEG C, is added into the melting liquid
Enter slag former and deoxidier carries out refining 40-60min, then casts.
2. process for making according to claim 1, wherein the blowing at least meets the following conditions：Temperature is 1600-
1800 DEG C, time 6-10h.
3. process for making according to claim 1, wherein the smelting temperature is 1650-1750 DEG C.
4. process for making according to claim 1, wherein the weight proportion of the steel scrap volume and the molten iron is 1：
22.8-46.3。
5. process for making according to claim 1, wherein the steel scrap, slag former and the weight proportion of deoxidation are 1：
0.03-0.05：0.026-0.46.
6. process for making according to claim 1, wherein the slag former is by 1：The lime of 0.125-0.19 weight ratios and
Refining slag forms.
7. process for making according to claim 6, wherein the refining slag is by CaO, SiO2And Al2O3According to 1：0.05-
0.06：The weight proportion of 0.6-0.7 forms.
8. process for making according to claim 6, wherein the weight % of the content of CaO in the lime >=85, and activity degree
≥250mL。
9. process for making according to claim 1, wherein the deoxidier is aluminium ingot, ferromanganese, aluminum steel, aluminium powder and ferrosilicon
It is one or more in powder.
10. HRB400 steel made from a kind of process for making as described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810390278.2A CN108660279A (en) | 2018-04-27 | 2018-04-27 | Improve the process for making and HRB400 steel of molten steel recovery rate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810390278.2A CN108660279A (en) | 2018-04-27 | 2018-04-27 | Improve the process for making and HRB400 steel of molten steel recovery rate |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108660279A true CN108660279A (en) | 2018-10-16 |
Family
ID=63781249
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810390278.2A Pending CN108660279A (en) | 2018-04-27 | 2018-04-27 | Improve the process for making and HRB400 steel of molten steel recovery rate |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108660279A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008274387A (en) * | 2007-05-07 | 2008-11-13 | Jfe Steel Kk | Method for melting cr-containing low alloy steel |
| CN101358323A (en) * | 2008-08-26 | 2009-02-04 | 攀钢集团成都钢铁有限责任公司 | Seamless steel tube for 27SiMnB steel, cylinder and production method thereof |
| CN102978538A (en) * | 2012-10-26 | 2013-03-20 | 河北钢铁股份有限公司承德分公司 | Smelting process for production of grade II hot-rolled reinforced bar |
| CN105401070A (en) * | 2015-12-18 | 2016-03-16 | 首钢水城钢铁（集团）有限责任公司 | Production method of finish rolling twisted steel for prestressed concrete |
| CN105734195A (en) * | 2014-12-09 | 2016-07-06 | 重庆金国凯畅机床厂 | Steel making converter process |
-
2018
- 2018-04-27 CN CN201810390278.2A patent/CN108660279A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008274387A (en) * | 2007-05-07 | 2008-11-13 | Jfe Steel Kk | Method for melting cr-containing low alloy steel |
| CN101358323A (en) * | 2008-08-26 | 2009-02-04 | 攀钢集团成都钢铁有限责任公司 | Seamless steel tube for 27SiMnB steel, cylinder and production method thereof |
| CN102978538A (en) * | 2012-10-26 | 2013-03-20 | 河北钢铁股份有限公司承德分公司 | Smelting process for production of grade II hot-rolled reinforced bar |
| CN105734195A (en) * | 2014-12-09 | 2016-07-06 | 重庆金国凯畅机床厂 | Steel making converter process |
| CN105401070A (en) * | 2015-12-18 | 2016-03-16 | 首钢水城钢铁（集团）有限责任公司 | Production method of finish rolling twisted steel for prestressed concrete |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104946972B (en) | Steel disc strip for diode lead and production technology of steel disc strip | |
| CN103642970B (en) | A kind of smelting process of carbon aluminium-killed steel | |
| CN103074545B (en) | High-strength low temperature hot rolling resistant channel steel for forklift gantry and preparation method for channel steel | |
| CN108251592A (en) | A kind of converter smelting method of extremely low phosphoretic steel | |
| CN114000048B (en) | SWRH82B hot-rolled wire rod for prestressed steel strand with nominal diameter of 12.5mm and preparation method thereof | |
| CN104087711B (en) | The method and the carbon that improve molten steel purity close knot steel ingot | |
| CN102851447B (en) | Outside-furnace refining production method of steel used in carbon steel welding wire | |
| CN102312054A (en) | Ladle furnace low alkalinity slag refining process | |
| CN108531807A (en) | A kind of heavy wall heavy caliber X80M pipelines clean steel and smelting process | |
| CN113322364B (en) | Low-cost smelting method of ultra-high phosphorus molten iron of steel for polar region | |
| CN102329917B (en) | Production method of clean steel | |
| CN107201422A (en) | A kind of production method of mild steel | |
| CN103966399B (en) | A kind of method of semisteel smelting medium carbon steel | |
| CN107365886B (en) | A kind of method of converter high temperature dephosphorization | |
| CN112626312B (en) | Low-carbon aluminum killed steel Al for reducing RH single process 2 O 3 Method of inclusion | |
| CN101775464A (en) | Micro carbon micro phosphorus aluminum manganese iron alloy as well as production method thereof | |
| CN104711476A (en) | Channel steel for hot rolling of forklift portal and preparation method of channel steel | |
| CN102962411B (en) | Production method of low-carbon and medium-carbon steel | |
| CN110317919B (en) | Low-cost production method of low-carbon enamel steel | |
| CN111455131A (en) | Smelting and continuous casting method of high-cleanliness wear-resistant steel | |
| CN107365884A (en) | A kind of method of ultra-low-carbon steel carbon component close limit control | |
| CN102732678A (en) | Control method of oxygen in low-carbon low-silicon aluminum-killed steel | |
| CN108660279A (en) | Improve the process for making and HRB400 steel of molten steel recovery rate | |
| CN106906330B (en) | A kind of method of cord steel LX72A non-metallic inclusion control | |
| CN115305411A (en) | Method for efficiently producing ultra-deep drawing cold-rolled enamel steel |
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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20181016 |
|
| RJ01 | Rejection of invention patent application after publication |