CN106381358B - The method of semisteel smelting high-phosphorus iron ore - Google Patents
The method of semisteel smelting high-phosphorus iron ore Download PDFInfo
- Publication number
- CN106381358B CN106381358B CN201610999504.8A CN201610999504A CN106381358B CN 106381358 B CN106381358 B CN 106381358B CN 201610999504 A CN201610999504 A CN 201610999504A CN 106381358 B CN106381358 B CN 106381358B
- Authority
- CN
- China
- Prior art keywords
- steel
- iron ore
- phosphorus iron
- smelting high
- semisteel smelting
- 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
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
-
- 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
- C21C5/32—Blowing from above
-
- 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 invention belongs to smelting iron and steel metal field, and in particular to a kind of method of semisteel smelting high-phosphorus iron ore.The method of the present invention includes：A, half steel hot metal composition and its percentage by weight is controlled to be：C 3.2~4.1%, Si 0.015~0.030%, Mn 0.02~0.04%, P 0.06~0.08%, S≤0.015%；B, it is 1300~1360 DEG C to control half steel charging temperature；C, after smelting oxygen blast 2min, addition active lime, dolomitic lime and slag former, oxygen blast later stage use low rifle position big flow oxygen blast, tap at 1650~1700 DEG C.The method of semisteel smelting high-phosphorus iron ore of the present invention, more traditional smelting process, can effectively reduce auxiliary material and ferrophosphorus consumption, it is contemplated that ton steel cost can reduce by 5 yuan.
Description
Technical field
The invention belongs to smelting iron and steel metal field, and in particular to a kind of method of semisteel smelting high-phosphorus iron ore.
Background technology
Phosphorus is with Fe in steel3P or Fe2P-shaped formula exists.The dephosphorisation reaction of steelmaking process is in molten metal and slag interface
Carry out, be that P is oxidized to P first2O5, stable calcium phosphate is then combined into CaO.The principal element for influencing dephosphorization is molten
The component of pond temperature, slag composition and molten metal.
Dephosphorisation reaction is strong exothermal reaction, and temperature reduces, and from thermodynamic consideration, low temperature dephosphorization is than advantageous.Slag composition
Influence be mainly shown as the influence of basicity of slag and slag beneficiation.P2O5Belong to the alkaline oxygen such as acidic oxide, CaO, MgO
Compound can reduce its activity, and basicity is higher, and effective w (CaO) is higher in slag, and dephosphorization is more complete.Be conducive to the condition of dephosphorization
It is：High alkalinity, high oxidative, good flow row slag, the agitation of sufficient molten bath, appropriate temperature and the big quantity of slag.
Existing smelting phosphor-containing steel is main phosphorous 0.025%~0.100%, and existing semi-steel making converter dephosphorization is extremely
0.010%~0.015%--LF-RH (addition ferrophosphorus), it is necessary to plus more auxiliary material and ferrophosphorus, there are cost it is higher the shortcomings of.
Such as Publication No. " CN104109727A ", entitled " method of half steel converter smelting Low-phosphorus Steel "；Publication number
For " CN104060018A ", entitled " a kind of method of low phosphorus steel by smelting semisteel "；Publication No. " CN101696462A ",
Entitled " a kind of method of low phosphorus steel by smelting semisteel " etc., will reduce phosphorus content in steel, it is necessary to add more
Slag making materials, makes in steel phosphorus content be less than 0.005%, and some processes when controlling half steel hot metal composition, it is necessary to add Ti,
The metals such as V, cost are higher.
The content of the invention
The technical problems to be solved by the invention are to provide a kind of low semisteel smelting of cost and obtain the method for high-phosphorus iron ore.
The method of semisteel smelting high-phosphorus iron ore, comprises the following steps：
A, half steel hot metal composition and its percentage by weight is controlled to be：C 3.2~4.1%, Si 0.015~0.030%, Mn
0.02~0.04%, P 0.06~0.08%, S≤0.015%；
B, it is 1300~1360 DEG C to control half steel charging temperature；
C, after smelting oxygen blast 2min, addition active lime, dolomitic lime and slag former, oxygen blast later stage use the big stream of low rifle position
Oxygen blast is measured, is tapped at 1650~1700 DEG C；
Wherein, active lime addition is 3.5~4.5kg/t steel, and dolomitic lime addition is 3.5~4.5kg/t steel, is made
Slag agent addition is 7~11kg/t steel；
Low rifle position for rifle position away from 1.2~1.49m of molten steel face, the oxygen blown oxygen flow of big flow is 40000~45000m3/
h；
Molten steel C content is 0.01~0.02% during tapping, and P content is 0.035~0.045%.
Further, half steel hot metal composition and its weight are controlled in the method for above-mentioned semisteel smelting high-phosphorus iron ore, wherein a steps
Percentage is：C 3.8%, Si 0.020%, Mn 0.03%, P 0.07%, S≤0.010%.
Further, the method for above-mentioned semisteel smelting high-phosphorus iron ore, it is 1340 that half steel charging temperature is wherein controlled in b step
DEG C, converter dress half steel amount is 130 tons.
Further, the method for above-mentioned semisteel smelting high-phosphorus iron ore, active lime addition is 4.0kg/t wherein in step c
Steel, dolomitic lime addition are 4.0kg/t steel, and slag former addition is 9kg/t steel.
The method of above-mentioned semisteel smelting high-phosphorus iron ore, wherein containing 85~90wt% of CaO in the active lime.
The method of above-mentioned semisteel smelting high-phosphorus iron ore, wherein containing CaO 48~55wt%, MgO 30 in the dolomitic lime
~40wt%.
The method of above-mentioned semisteel smelting high-phosphorus iron ore, wherein containing SiO in the slag former245~48wt%, MgO 3~
7wt%, CaO 3~5wt%, TFe ＞ 12wt%, MnO 3~8wt%, P ＜ 0.1wt%, S ＜ 0.1wt%.
Further, the method for above-mentioned semisteel smelting high-phosphorus iron ore, low rifle position is rifle position away from molten steel face wherein in step c
1.35m, the oxygen blown oxygen flow of big flow are 43000m3/h。
The method of semisteel smelting high-phosphorus iron ore of the present invention, it is more traditional smelt phosphor-containing steel method, can effectively reduce auxiliary material and
Ferrophosphorus consumption, it is contemplated that ton steel cost can reduce by 5 yuan, the method is mass produced throughout the year in, can effectively reduce and be produced into
This, larger profit is brought for enterprise.
Embodiment
The method of semisteel smelting high-phosphorus iron ore, comprises the following steps：
A, half steel water after vanadium extraction is controlled to meet vanadium extraction requirement, its component and its percentage by weight are：C 3.2~
4.1%, Si 0.015~0.030%, Mn 0.02~0.04%, P 0.06~0.08%, S≤0.015%；
B, it is 1300~1360 DEG C to control half steel charging temperature, if vessel dimensions are certain, is closed according to economy, security
Reason arranges charge weight, and according to the steel condition of production is climbed, its converter dress half steel amount is generally 125~145 tons；
C, for good slugging, after oxygen blast 2min is smelted, active lime, dolomitic lime and slag former, oxygen blast are added
Later stage uses low rifle position big flow oxygen blast, taps at 1650~1700 DEG C；The oxygen blast later stage of the present invention specifically refers to half steel
When smelting progress reaches 2/3；
Wherein, active lime addition is 3.5~4.5kg/t steel, and dolomitic lime addition is 3.5~4.5kg/t steel, is made
Slag agent addition is 7~11kg/t steel；
Low rifle position for rifle position away from 1.2~1.49m of molten steel face, the oxygen blown oxygen flow of big flow is 40000~45000m3/
h；
Tap in low-carbon amount, molten steel C content is 0.01~0.02% during tapping, and P content is 0.035~0.045%.
Further, half steel hot metal composition and its weight are controlled in the method for above-mentioned semisteel smelting high-phosphorus iron ore, wherein a steps
Percentage is：C 3.8%, Si 0.020%, Mn 0.03%, P 0.07%, S≤0.010%.
Further, the method for above-mentioned semisteel smelting high-phosphorus iron ore, it is 1340 that half steel charging temperature is wherein controlled in b step
DEG C, converter dress half steel amount is 130 tons.
Further, the method for above-mentioned semisteel smelting high-phosphorus iron ore, active lime addition is 4.0kg/t wherein in step c
Steel, dolomitic lime addition are 4.0kg/t steel, and slag former addition is 9kg/t steel.
The method of above-mentioned semisteel smelting high-phosphorus iron ore, wherein containing 85~90wt% of CaO in the active lime.
The method of above-mentioned semisteel smelting high-phosphorus iron ore, wherein containing CaO 48~55wt%, MgO 30 in the dolomitic lime
~40wt%.
The method of above-mentioned semisteel smelting high-phosphorus iron ore, wherein containing SiO in the slag former245~48wt%, MgO 3~
7wt%, CaO 3~5wt%, TFe ＞ 12wt%, MnO 3~8wt%, P ＜ 0.1wt%, S ＜ 0.1wt%.
Further, the method for above-mentioned semisteel smelting high-phosphorus iron ore, low rifle position is rifle position away from molten steel face wherein in step c
1.35m, the oxygen blown oxygen flow of big flow are 43000m3/h。
The embodiment of the present invention is further described with reference to embodiment, is not therefore limited the present invention
System is among the embodiment described scope.
Embodiment 1
The 200t converters of certain factory use semi-steel making, and according to half steel condition is controlled in table 1, experimental group 1~5 is using the present invention
Method control half steel hot metal composition, half steel charging temperature and half steel useful load, design parameter are shown in Table 1：
1 semisteel smelting condition of table
1~5 group of experimental group is after oxygen blast 2min is smelted, and adds active lime, dolomitic lime and slag former, experimental group 1
~5 groups use low rifle position big flow oxygen blast in the oxygen blast later stage, and rifle position is away from 1.2~1.49m of molten steel face, oxygen blown oxygen flow
40000~45000m3/ h, taps at 1650~1700 DEG C；Specific smelting process is shown in Table 2：
The technological parameter of 2 semisteel smelting high-phosphorus iron ore of table
The present invention is tapped using low-carbon, and tapping carbon content is 0.01~0.02%, using semisteel smelting high-phosphorus iron ore of the present invention
Method after phosphorus content control of tapping be 0.035~0.045%, improve converter tapping phosphorus content, it is relatively normal to smelt tapping phosphorus
Content 0.010~0.015% can increase by more than 0.028%, can not only greatly reduce ferrophosphorus and supplementary product onsumption, and steel per ton
Cost can reduce at least 5 yuan, have larger economic benefit and application prospect.
Claims (7)
1. the method for semisteel smelting high-phosphorus iron ore, it is characterised in that comprise the following steps：
A, half steel hot metal composition and its percentage by weight is controlled to be：C 3.2~4.1%, Si 0.015~0.030%, Mn 0.02
~0.04%, P 0.06~0.08%, S≤0.015%；
B, it is 1300~1360 DEG C to control half steel charging temperature；
C, after smelting oxygen blast 2min, addition active lime, dolomitic lime and slag former, oxygen blast later stage are blown using low rifle position big flow
Oxygen, taps at 1650~1700 DEG C；
Wherein, active lime addition is 3.5~4.5kg/t steel, and dolomitic lime addition is 3.5~4.5kg/t steel, slag former
Addition is 7~11kg/t steel；
Low rifle position refers to rifle position away from 1.2~1.49m of molten steel face, and the oxygen blown oxygen flow of big flow is 40000~45000m3/h；
Molten steel C content is 0.01~0.02% during tapping, and P content is 0.035~0.045%；
Contain SiO in the slag former245~48wt%, MgO 3~7wt%, CaO 3~5wt%, TFe ＞ 12wt%, MnO
3~8wt%, P ＜ 0.1wt%, S ＜ 0.1wt%.
2. the method for semisteel smelting high-phosphorus iron ore according to claim 1, it is characterised in that：Controlled in a steps half steel water into
Divide and its percentage by weight is：C 3.8%, Si 0.020%, Mn 0.03%, P 0.07%, S≤0.010%.
3. the method for semisteel smelting high-phosphorus iron ore according to claim 1, it is characterised in that：Half steel is controlled to enter furnace temperature in b step
Spend for 1340 DEG C, converter dress half steel amount is 130 tons.
4. the method for semisteel smelting high-phosphorus iron ore according to claim 1, it is characterised in that：Active lime addition in step c
For 4.0kg/t steel, dolomitic lime addition is 4.0kg/t steel, and slag former addition is 9kg/t steel.
5. according to the method for the semisteel smelting high-phosphorus iron ore of claim 1 or 4, it is characterised in that：Contain in the active lime
85~90wt% of CaO.
6. according to the method for the semisteel smelting high-phosphorus iron ore of claim 1 or 4, it is characterised in that：Contain in the dolomitic lime
30~40wt% of CaO 48~55wt%, MgO.
7. the method for semisteel smelting high-phosphorus iron ore according to claim 1, it is characterised in that：In step c low rifle position for rifle position away from
Molten steel face 1.35m, the oxygen blown oxygen flow of big flow are 43000m3/h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610999504.8A CN106381358B (en) | 2016-11-14 | 2016-11-14 | The method of semisteel smelting high-phosphorus iron ore |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610999504.8A CN106381358B (en) | 2016-11-14 | 2016-11-14 | The method of semisteel smelting high-phosphorus iron ore |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106381358A CN106381358A (en) | 2017-02-08 |
| CN106381358B true CN106381358B (en) | 2018-05-01 |
Family
ID=57958984
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610999504.8A Active CN106381358B (en) | 2016-11-14 | 2016-11-14 | The method of semisteel smelting high-phosphorus iron ore |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106381358B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102260822A (en) * | 2011-07-27 | 2011-11-30 | 攀钢集团有限公司 | High-phosphorus low-sulfur non-oriented electrical steel and smelting method thereof |
| CN102776313A (en) * | 2012-08-20 | 2012-11-14 | 武汉钢铁(集团)公司 | Method for smelting high-phosphorus steel by low-temperature low-silicon molten iron in converter |
| CN102876830A (en) * | 2011-07-15 | 2013-01-16 | 武汉钢铁(集团)公司 | Converter smelting method for high-phosphorus steel for containers |
| CN103131817A (en) * | 2011-11-30 | 2013-06-05 | 上海梅山钢铁股份有限公司 | Converter steelmaking phosphorus reservation smelting method |
| CN103773916A (en) * | 2014-01-23 | 2014-05-07 | 首钢总公司 | Method for smelting weather resistant steel through high-phosphorus-content steel discharging by converter |
| CN106086286A (en) * | 2016-08-02 | 2016-11-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium-bearing hot metal smelts the method controlling steelmaking converter tapping phosphorus content |
-
2016
- 2016-11-14 CN CN201610999504.8A patent/CN106381358B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102876830A (en) * | 2011-07-15 | 2013-01-16 | 武汉钢铁(集团)公司 | Converter smelting method for high-phosphorus steel for containers |
| CN102260822A (en) * | 2011-07-27 | 2011-11-30 | 攀钢集团有限公司 | High-phosphorus low-sulfur non-oriented electrical steel and smelting method thereof |
| CN103131817A (en) * | 2011-11-30 | 2013-06-05 | 上海梅山钢铁股份有限公司 | Converter steelmaking phosphorus reservation smelting method |
| CN102776313A (en) * | 2012-08-20 | 2012-11-14 | 武汉钢铁(集团)公司 | Method for smelting high-phosphorus steel by low-temperature low-silicon molten iron in converter |
| CN103773916A (en) * | 2014-01-23 | 2014-05-07 | 首钢总公司 | Method for smelting weather resistant steel through high-phosphorus-content steel discharging by converter |
| CN106086286A (en) * | 2016-08-02 | 2016-11-09 | 攀钢集团攀枝花钢铁研究院有限公司 | Vanadium-bearing hot metal smelts the method controlling steelmaking converter tapping phosphorus content |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106381358A (en) | 2017-02-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102268512B (en) | Control method for inclusion in steel | |
| CN102212643B (en) | Converter less-slag smelting process | |
| CN102952923B (en) | Process for smelting aluminum containing steel through calcium carbide deoxidation | |
| CN101519711A (en) | Method for desiliconizing, demanganizing, dephosphorizing and desulfurating molten iron | |
| CN104294002B (en) | A kind of method introducing carbonic acid gas converter single stage method smelting middle-low-carbon ferrochrome | |
| CN105483314B (en) | A kind of control method for improving the residual manganese content of converter terminal | |
| CN102559985B (en) | Method of smelting low-phosphorus steel through converter | |
| CN103789483B (en) | Method for smelting low-phosphorus steel by using semi-steel | |
| CN101717842A (en) | Method for dephosphorization and desulphurization in process of steel production in induction furnace | |
| CN109112249A (en) | A kind of middle high manganese molten iron improves the converter smelting method of the residual manganese of endpoint molten steel | |
| CN103146873B (en) | The semi-steel making slagging method of enrichment sludge ball and semi-steel making | |
| CN109097522B (en) | Converter smelting method for molten steel residual manganese at medium-high manganese, high phosphorus and low silicon iron water extraction and improvement end point | |
| CN104195290A (en) | Molten steel dephosphorization agent and molten steel dephosphorization refining method | |
| CN102952915B (en) | Phosphorus-containing steel converter smelting method | |
| CN105671248A (en) | Smelting method of converter efficient dephosphorization | |
| CN110117689A (en) | A method of based on high-silicon molten iron converter double slag process low phosphorus steel by smelting | |
| CN103627843B (en) | Semi-steel making slagging method and Semi-steel making method | |
| CN107365886B (en) | A kind of method of converter high temperature dephosphorization | |
| CN103215408B (en) | A kind ofly add the method that slag block carries out converter steelmaking | |
| CN103409595A (en) | Dephosphorization and steel-making method of vanadium-containing molten iron | |
| CN101020943A (en) | Phosphorus reducing method for process of smelting Ni-Cr pig iron with nickel oxide ore | |
| CN108570528B (en) | Control method for improving steelmaking converter blowing end point temperature | |
| CN106381358B (en) | The method of semisteel smelting high-phosphorus iron ore | |
| CN106086286B (en) | The method that vanadium-bearing hot metal smelts control steelmaking converter tapping phosphorus content | |
| CN111074037B (en) | Process method for upgrading structure of manganese-rich slag smelting product |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |