CN109797264A - A kind of control method and silicon steel production method of silicon steel Ti content - Google Patents
A kind of control method and silicon steel production method of silicon steel Ti content Download PDFInfo
- Publication number
- CN109797264A CN109797264A CN201910032729.XA CN201910032729A CN109797264A CN 109797264 A CN109797264 A CN 109797264A CN 201910032729 A CN201910032729 A CN 201910032729A CN 109797264 A CN109797264 A CN 109797264A
- Authority
- CN
- China
- Prior art keywords
- content
- silicon steel
- converter
- steel
- molten iron
- 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
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
- Treatment Of Steel In Its Molten State (AREA)
Abstract
The present invention relates to iron and steel smelting technology field, in particular to the control method and silicon steel production method of a kind of silicon steel Ti content.The control method of above-mentioned silicon steel Ti content is in the tapping process of converter smelting, and using infrared slide plate slag pushing equipment, slag thickness of slag layer is less than 10mm in ladle after converter tapping.The technique does not need to claim to molten iron Ti content range, has both met the needs of blast fumance titanium nitride furnace retaining, in turn avoids the process cost of the pre- de- titanium of molten iron.Can be minimum to can achieve within 10ppm within 20ppm by residual elements Ti content stability contorting in molten steel using the process, meet requirement of the silicon steel production to molten steel Ti content.
Description
Technical field
The present invention relates to iron and steel smelting technology field, in particular to the control method and silicon steel of a kind of silicon steel Ti content produce
Method.
Background technique
Ti is the harmful element in silicon steel production, formation for non-orientation silicon steel TiN and will moved back in the precipitation of crystal boundary
Growing up for crystal grain is hindered during fire, will affect the quantity of inhibitor in steel for the formation of orientation silicon steel TiN, it finally all can be right
Silicon steel product magnetic property has an adverse effect.Therefore Ti needs strict control to contain as harmful residual element in silicon steel production
Amount, generally requires Ti content less than 0.0020%.
The source of Ti is mainly the Ti element contained in Ti element and the Antaciron in molten iron in silicon steel.In order to control
The content of Ti in silicon steel finished product, Ti content in molten iron has all done when producing silicon steel in each factory clearly stipulate that some steel mills require
Molten iron Ti content is less than 0.03%.But for the needs of blast furnace protecting, and need that titaniferous furnace charge is added in ironmaking processes, is
This contradiction is solved, some steel mills also developed the pre- de- titanium technique of molten iron.
The prior art or by the blast-melted titaniferous amount of strict control, or reduced by molten iron pretreatment mode into turning
The method of furnace molten iron Ti content, to meet silicon steel production needs, but increase Iron-smelting control difficulty and process at
This, while increasing silicon steel and producing the difficulty on organizing and coordinating.Therefore a kind of novel liquid steel Ti content control technique side is developed
Method becomes the needs of current silicon steel production technology optimization.
Summary of the invention
In view of this, the present invention provides the control method and silicon steel production method of a kind of silicon steel Ti content.
The present invention provides a kind of control method of silicon steel Ti content, and in the tapping process of converter smelting, use is infrared
Slide plate slag pushing equipment, slag thickness of slag layer is less than 10mm in ladle after converter tapping.
Further, enter before converter that Ti content is more than 0.05% in molten iron.
Further, enter before converter that Ti content is 0.05%~0.08% in molten iron.
The present invention also provides a kind of silicon steel production methods comprising following steps:
Melting；
Converter smelting, in tapping process, using infrared slide plate slag pushing equipment, slag thickness of slag layer in ladle after converter tapping
Less than 10mm；
Refining；
Continuous casting；
Rolling；
Post-processing.
Further, enter before converter that Ti content is more than 0.05% in molten iron.
Further, enter before converter that Ti content is 0.05%~0.08% in molten iron.
Further, the post-processing includes: pickling, cold stamping, annealing, insulating coating.
Compared with the existing technology, the control method of silicon steel Ti content provided by the invention has the advantages that
1, it does not need to claim to molten iron Ti content range, has both met the needs of blast fumance titanium nitride furnace retaining,
In turn avoid the process cost of the pre- de- titanium of molten iron.
2, by, in the research of STEELMAKING PRODUCTION each process link changes of contents situation, making full use of converter smelting to titanium elements
The effect of de- titanium takes control vessel slag to enter the method for ladle, and titanium oxide reduction in clinker is avoided to enter in steel.
3, using the process can by residual elements Ti content stability contorting in molten steel within 20ppm, it is minimum can
To reach within 10ppm, meet requirement of the silicon steel production to molten steel Ti content.
Specific embodiment
The invention discloses a kind of control method of silicon steel Ti content, those skilled in the art can use for reference present disclosure,
It is suitably modified realization of process parameters.In particular, it should be pointed out that all similar substitutions and modifications carry out those skilled in the art
Say it is it will be apparent that they are considered as being included in the present invention.Method and application of the invention has passed through preferred embodiment
It is described, related personnel can obviously not depart from the content of present invention, in spirit and scope to method described herein and answer
With being modified or appropriate changes and combinations, carry out implementation and application the technology of the present invention.
In order to control the content of Ti in silicon steel, at present it is generally to use to start with from source, controls blast-melted titaniferous amount, or
Person reduces the content of Ti in silicon steel by molten iron pretreatment mode.But the present invention it has been investigated that, in smelting process, molten iron exists
Oxygen blast smelting is carried out in converter, the titanium elements in molten iron form titanium oxide in conjunction with oxygen element, and titanium oxide, which floats, enters vessel slag,
Ti content is minimum in blowing latter stage molten steel can drop to 1ppm, at this time meet requirement of the silicon steel to Ti content.But institute
With Ti content in finished product silicon steel it is exceeded be because are as follows: in tapping process, steel slag can first pass through converter taphole in the tapping of falling furnace
Ladle is flowed to, in tapping latter stage as the reduction in molten steel face in converter can form whirlpool at tapping hole, the clinker on molten steel face
Ladle will be entered with molten steel swirling flow.During liquid steel refining in tapping process and later, a large amount of ferrosilicon and ferro-aluminum add
Enter ladle and component controlling is carried out to molten steel, unstable oxide ferrous oxide, manganese oxide, titanium oxide in steel slag etc. also can
It is reduced, enters molten steel in a metallic form, lead to the increase of manganese content and Ti content in steel.
It is mostly the technology because in molten iron more than Ti content that present inventor, which overcomes Ti in silicon steel in the prior art, as a result,
Prejudice looks for another way, and pre-process except Ti to molten iron, only enters the amount of ladle from control converter slag to realize in silicon steel
The control of Ti content.
Specifically, the control method of silicon steel Ti content provided by the invention uses in the tapping process of converter smelting
Infrared slide plate slag pushing equipment, slag thickness of slag layer is less than 10mm in ladle after converter tapping.Molten iron is subjected to oxygen blast in converter
It smelts, the titanium elements in molten iron form titanium oxide in conjunction with oxygen element, and titanium oxide, which floats, enters vessel slag, in the latter stage molten steel that blows
Ti content drops to 20ppm, minimum to drop to 10ppm, meets requirement of the silicon steel to Ti content.
Infrared slag pushing equipment is the content of slag steel during tapping using infrared camera detection, and is controlled according to this signal
The opening and closing of slide plate.Infrared slag pushing equipment in the present invention can use existing equipment.As a preferred solution of the present invention, infrared
Slag pushing equipment specifically includes: infrared camera, CPU and slide plate.Infrared camera is connected with CPU, the infrared letter that will test
Number being sent to CPU is handled, and CPU calculates the heat radiation of beam real-time area of section value, the section according to the signal processing
Energy value and real-time energy per unit area value are compared, when real-time area of section with setting unit section energy correlation data
Value is closed with control slide plate when setting the ratio of unit section energy less than 15%.
The above method is not necessarily to carry out pre-processing except Ti to molten iron, does not need to claim to molten iron Ti content range, both full
Foot needs of the blast fumance with titanium nitride furnace retaining, in turn avoid the process cost of the pre- de- titanium of molten iron.This method make to be suitable for into
The case where Ti content is more than 0.05% in molten iron before converter, it is preferable that enter before converter Ti content in molten iron be 0.05%~
0.08%.
Based on the above method, the present invention also provides a kind of silicon steel production methods comprising following steps:
Melting；
Converter smelting, in tapping process, using infrared slide plate slag pushing equipment, slag thickness of slag layer in ladle after converter tapping
Less than 10mm；
Refining；
Continuous casting；
Rolling；
Post-processing.
Further, enter before converter that Ti content is more than 0.05% in molten iron.It is highly preferred that entering before converter Ti content in molten iron
It is 0.05%~0.08%.
Above-mentioned post-processing can specifically include: pickling, cold stamping, annealing, insulating coating.
The control method of silicon steel Ti content provided by the invention has the advantages that
(1) it does not need to claim to molten iron Ti content range, has both met the needs of blast fumance titanium nitride furnace retaining,
In turn avoid the process cost of the pre- de- titanium of molten iron.
(2) by, in the research of STEELMAKING PRODUCTION each process link changes of contents situation, making full use of converter smelting to titanium elements
The effect for refining de- titanium takes control vessel slag to enter the method for ladle, and titanium oxide reduction in clinker is avoided to enter in steel.
(3) using the process can by residual elements Ti content stability contorting in molten steel within 20ppm, it is minimum can
To reach within 10ppm, meet requirement of the silicon steel production to molten steel Ti content.
Below with reference to embodiment, the present invention is further explained:
Embodiment 1
In the tapping process of converter smelting, using infrared slide plate slag pushing equipment, such as table 1, to 50 furnace iron of quantity-produced
Water Ti content and blowing end point molten steel Ti content are counted, and entering furnace molten iron Ti content range is 0.019%~0.078%, are put down
Equal Ti content is 0.0546%.Oxidation reaction occurs for titanium and oxygen during bessemerizing in molten iron water, generates on titanium oxide
Floating to enter clinker, bessemerizing endpoint molten steel Ti content is 0~0.0010%, and average value 0.0001% shows in molten iron
Titanium is bessemerized available good removing, and Ti content reaches extremely low level in converter smelting endpoint molten steel.
Thickness of slag layer measures after converter slag-resisting: iron pipe being inserted into molten steel after smelting, clinker is attached on iron, will
Iron takes out, and measurement is attached to the thickness of the clinker of steel pole
1 molten iron Ti content of table and bessemerize endpoint molten steel Ti content (%) and slag thickness
Embodiment 2
In the tapping process of converter smelting, using infrared slide plate slag pushing equipment, 12 furnace molten iron titanium of quantity-produced is contained
Amount and blowing end point molten steel Ti content are counted, and in molten iron, Ti content is listed in table 2 in RH furnace molten steel and in casting machine molten steel.
Thickness of slag layer measures after converter slag-resisting, and method is same as above, and is as a result listed in table 2.As shown in Table 2, molten iron Ti content range be 0.041~
0.056%, casting machine molten steel Ti content is 0.0011~0.0018%, is below 20ppm.
2 molten iron Ti content of table, RH furnace molten steel Ti content, Ti content (%) and slag thickness (mm) in casting machine molten steel
As shown in the above, use technique of the invention can be with stability contorting within 20ppm by molten steel Ti content
Range, it is minimum to can control within 10ppm.
The above is only a preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (7)
1. a kind of control method of silicon steel Ti content, which is characterized in that in the tapping process of converter smelting, using infrared slide plate
Slag pushing equipment, slag thickness of slag layer is less than 10mm in ladle after converter tapping.
2. control method according to claim 1, which is characterized in that enter before converter that Ti content is more than 0.05% in molten iron.
3. control method according to claim 2, which is characterized in that enter before converter Ti content in molten iron be 0.05%~
0.08%.
4. a kind of silicon steel production method, which comprises the steps of:
Melting；
Converter smelting, in tapping process, using infrared slide plate slag pushing equipment, slag thickness of slag layer is less than in ladle after converter tapping
10mm；
Refining；
Continuous casting；
Rolling；
Post-processing.
5. production method according to claim 4, which is characterized in that enter before converter that Ti content is more than 0.05% in molten iron.
6. production method according to claim 5, which is characterized in that enter before converter Ti content in molten iron be 0.05%~
0.08%.
7. production method according to claim 6, which is characterized in that the post-processing includes: pickling, and cold stamping is annealed,
Insulating coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910032729.XA CN109797264A (en) | 2019-01-14 | 2019-01-14 | A kind of control method and silicon steel production method of silicon steel Ti content |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910032729.XA CN109797264A (en) | 2019-01-14 | 2019-01-14 | A kind of control method and silicon steel production method of silicon steel Ti content |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109797264A true CN109797264A (en) | 2019-05-24 |
Family
ID=66558755
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910032729.XA Pending CN109797264A (en) | 2019-01-14 | 2019-01-14 | A kind of control method and silicon steel production method of silicon steel Ti content |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109797264A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111471827A (en) * | 2020-04-03 | 2020-07-31 | 湖南华菱涟源钢铁有限公司 | Method for controlling titanium content in smelted silicon steel to be less than or equal to 15ppm |
| CN111560557A (en) * | 2020-05-29 | 2020-08-21 | 鞍钢股份有限公司 | Process for controlling titanium and reducing titanium of non-oriented silicon steel |
| CN113462847A (en) * | 2021-05-27 | 2021-10-01 | 马鞍山钢铁股份有限公司 | Control method for ultralow titanium content of ultralow-carbon high-aluminum steel |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796948A (en) * | 2011-05-27 | 2012-11-28 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with extremely low content of Ti and smelting method for non-oriented electrical steel plate |
| CN102864274A (en) * | 2012-09-18 | 2013-01-09 | 山西太钢不锈钢股份有限公司 | Method for producing silicon steel with converter |
| CN104988424A (en) * | 2015-07-31 | 2015-10-21 | 河北钢铁股份有限公司承德分公司 | Method for smelting non-oriented silicon steel by using molten iron containing vanadium and titanium |
| CN105441638A (en) * | 2015-12-02 | 2016-03-30 | 武汉钢铁(集团)公司 | Method for smelting alloyed oriented silicon steel alloyed in RH furnace |
-
2019
- 2019-01-14 CN CN201910032729.XA patent/CN109797264A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102796948A (en) * | 2011-05-27 | 2012-11-28 | 宝山钢铁股份有限公司 | Non-oriented electrical steel plate with extremely low content of Ti and smelting method for non-oriented electrical steel plate |
| CN102864274A (en) * | 2012-09-18 | 2013-01-09 | 山西太钢不锈钢股份有限公司 | Method for producing silicon steel with converter |
| CN104988424A (en) * | 2015-07-31 | 2015-10-21 | 河北钢铁股份有限公司承德分公司 | Method for smelting non-oriented silicon steel by using molten iron containing vanadium and titanium |
| CN105441638A (en) * | 2015-12-02 | 2016-03-30 | 武汉钢铁(集团)公司 | Method for smelting alloyed oriented silicon steel alloyed in RH furnace |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111471827A (en) * | 2020-04-03 | 2020-07-31 | 湖南华菱涟源钢铁有限公司 | Method for controlling titanium content in smelted silicon steel to be less than or equal to 15ppm |
| CN111560557A (en) * | 2020-05-29 | 2020-08-21 | 鞍钢股份有限公司 | Process for controlling titanium and reducing titanium of non-oriented silicon steel |
| CN113462847A (en) * | 2021-05-27 | 2021-10-01 | 马鞍山钢铁股份有限公司 | Control method for ultralow titanium content of ultralow-carbon high-aluminum steel |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106636953B (en) | A kind of effective martensitic stain less steel P91 smelting processes of boiler | |
| CN109797264A (en) | A kind of control method and silicon steel production method of silicon steel Ti content | |
| CN107151763B (en) | Thin gauge is high-strength cold-formed to use hot rolled strip and its production method | |
| CN102061351B (en) | Method for producing low-carbon steel and ultra-low-carbon steel by VD, LF and VD processes | |
| CN102978505B (en) | Smelting method of high-strength IF steel | |
| CN101633038B (en) | Method for reducing surface defect of stainless steel continues casting blank | |
| CN102330021A (en) | Full production process of low-temperature oriented silicon steel | |
| CN102345057A (en) | High strength and toughness Q460E structural steel thick plate and production method thereof | |
| CN107841687B (en) | A kind of smelting process of ultralow boron steel | |
| CN112342333A (en) | High-efficiency low-oxygen-level ultra-low-carbon steel production method | |
| CN105950966B (en) | Using the method for intrinsic inhibitor method and strand low-temperature heat technique productions Hi-B steel | |
| CN101619378A (en) | Method for deoxidizing molten steel | |
| CN107829024A (en) | A kind of 700MPa levels above superhigh intensity weather-resistant steel plate and its hot continuous rolling process | |
| CN106399822B (en) | A kind of Hi-B steel manufactured using intrinsic inhibitor method and slab low-temperature heat technique | |
| WO2021036974A1 (en) | Method for controlling cold-rolled steel defect of titanium-containing ultra-low carbon steel | |
| CN108411205B (en) | The method of CSP process production high-magnetic induction, low-iron loss non-oriented electrical steel | |
| CN112921237A (en) | Smelting method of silicon-manganese killed non-oriented silicon steel | |
| CN103695775A (en) | 345MPa-level steel plate for high-rise building structure and production method thereof | |
| CN105568118B (en) | Low-temperature and high-magnetic-strength oriented silicon steel production process | |
| CN104263875B (en) | A kind of top blown converter adopts high phosphorus hot metal to produce the dephosphorizing method of alloy bonding wire steel | |
| CN109023023A (en) | A kind of manufacturing method of rare-earth heat-resistant steel board | |
| CN105331776B (en) | A kind of calcium treating method of Ultra-low carbon high-aluminum steel | |
| CN105463316A (en) | Method for producing ultra-low carbon steel on basis of flexible thin slab casting (FTSC) | |
| CN112322835A (en) | LF high-alkalinity slagging process for square billet aluminum killed steel | |
| CN102876851B (en) | Method for improving calcium yield of RH vacuum furnace |
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: 20190524 |
|
| RJ01 | Rejection of invention patent application after publication |