CN103966399A - Method of utilizing semisteel to smelt medium-carbon steel - Google Patents
Method of utilizing semisteel to smelt medium-carbon steel Download PDFInfo
- Publication number
- CN103966399A CN103966399A CN201410188279.0A CN201410188279A CN103966399A CN 103966399 A CN103966399 A CN 103966399A CN 201410188279 A CN201410188279 A CN 201410188279A CN 103966399 A CN103966399 A CN 103966399A
- Authority
- CN
- China
- Prior art keywords
- steel
- weight
- slag
- lime
- converter
- 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.)
- Granted
Links
Landscapes
- Carbon Steel Or Casting Steel Manufacturing (AREA)
Abstract
The invention discloses a method of utilizing semisteel to smelt medium-carbon steel. The method comprises the following steps: feeding the semisteel to a converter, adding active lime, high-magnesium lime and an acidic compound slagging constituent to the converter, performing top blowing of oxygen to carry out converting, adjusting the basicity of slag in the converter to be 2-2.5, converting until the carbon content of the molten steel is 1.0-1.5 wt%, and discarding the slag; (2) under the converting condition of top blowing of oxygen, adding active lime, high-magnesium lime and the acidic compound slagging constituent to the converter again, adjusting the basicity of slag in the converter to be 3-4, then performing smelting end point control and conducting tapping of the molten steel; (3) after the tapping of the molten steel, pouring out 30-50 wt% of slag, and performing splash protection for the converter; (4) circulating the steps of (1) to (3), and smelting the next furnace of semisteel. The method can effectively dephosphorize and protect carbon, achieves the medium-carbon steel smelting purpose under dephosphorization, and recycles part of slag, so that the cost for semisteel smelting is reduced.
Description
Technical field
The present invention relates to metallurgical technology field, particularly, relate to a kind of method of semisteel smelting medium carbon steel.
Background technology
Along with industry and scientific and technological development, every profession and trade is more and more harsher to the specification of quality of steel.In steel, carbon content and phosphorus content directly affect the quality of steel.The method that during converter smelting, end point carbon is controlled generally has two kinds, a kind of is homlolgation, the carbon of tapping is lower, tapping process adds carburelant to carry out carburetting to molten steel, the method can guarantee in endpoint molten steel, to have lower phosphorus content, but slag oxidation can corrode the high reductor consumption that can increase of furnace lining, molten steel oxygen activity, also can reduce yield of alloy, and the backward ladle of tapping adds a large amount of carburelants, make molten steel composition fluctuation larger simultaneously; Another kind method is that height draws the method for re-blowing, and the method tapping carbon content is higher, and generally, between >=0.20%, steel oxygen content in water is lower, and yield of alloy is higher and stablely save a large amount of carburelants simultaneously, but the method is difficult to realize liquid steel dephosphorization simultaneously, protects carbon.
At present, domestic molten iron-steelmaking enterprise, by the optimization to converter smelting process, substantially can realize molten steel Dephosphorization under high catch carbon steel-making mode and protect carbon.Existing with the high report that draws the method smelting high carbon steel of re-blowing of molten iron employing in existing document, as the 7th (2009) China Steel nd Annual Meeting collection of < < (on) " converter high carbon steel Study on Smelting Process and application " literary composition in > > discloses Anshan iron and steel plant two steel-making for solving the dephosphorization of converter smelting high carbon steel, protect carbon, the problem that temperature raising three is difficult to realize simultaneously, by terminal is stayed to the quantity of slag, bottom blowing flow, the optimization that oxygen lance position and terminal are controlled has finally realized height and has drawn the method smelting high carbon steel of re-blowing, and obtained good effect.But the design parameter while not relating to converter smelting high carbon steel in literary composition, as slagging method etc., and what adopt is conventional molten iron-steelmaking.
In order to ensure the effective utilization to vanadium resource, adopting schreyerite resource to smelt need to carry out vanadium extraction and desulfurization before steel-making.But, carbonaceous amount percentage composition low (3.4%-4.0%) in the half steel that semi-steel making enterprise obtains after by desulfurization vanadium extraction, in half steel, silicon, manganese heating slagging constituent content are vestige, and during semisteel smelting, slag making mostly adopts and adds acid slag making materials, slag system constituent element is single, slagging speed is slow, and dephosphorization rate is low.Therefore, during semisteel smelting high carbon steel, nearly all adopt homlolgation, and use half steel for raw material and adopt high method of drawing the method for re-blowing to smelt medium carbon steel not yet to have report.Adopt the semisteel smelting method of homlolgation owing to adding a large amount of carburelants, increased the cost of smelting and can cause in molten steel composition fluctuation larger, and in the method, needed a large amount of auxiliary materials also further to improve the cost of semisteel smelting.
Summary of the invention
The object of the invention is in order to overcome the defect that in existing semisteel smelting method, cost is higher, sludging time is long and dephosphorization effect is poor, the method for the semisteel smelting medium carbon steel of a kind of low cost and effective dephosphorization is provided.
The present inventor finds under study for action, at top blast oxygen, carry out under blowing condition, by adding quickened lime, high magnesium lime and acid composite fluxing medium working the slag basicity, the problem that can effectively solve that half steel temperature is low, slagging constituent element is single, the slow dephosphorization rate of slagging speed is low in prior art; And can effectively slow down reaction between carbon and oxygen speed in stove by again adding quickened lime, high magnesium lime and acid composite fluxing medium working the slag basicity and carrying out the control of smelting endpoint, reach the object of protecting carbon.The present inventor further studies discovery, the circulation that the part slag of a upper stove terminal is carried out to half steel for next stove is smelted, can solve the problem that semi-steel making slagging is difficult, dephosphorization rate is low, and reduce the consumption of quickened lime, high magnesium lime and acid composite fluxing medium, thereby reduced the cost of semisteel smelting.
To achieve these goals, the invention provides a kind of method of semisteel smelting medium carbon steel, wherein, the method comprises: (1) adds quickened lime, high magnesium lime and acid composite fluxing medium be blended into half steel in converter after in stove, top blast oxygen blows, basicity of slag in converter is adjusted to 2-2.5, blows and when carbon content in molten steel is 1.0-1.5 % by weight, outwell slag; (2) under the condition blowing at top top blast oxygen, again in stove, add quickened lime, high magnesium lime and acid composite fluxing medium, the basicity of slag in converter is adjusted to 3-4, then carry out Terminal Process Control tapping; (3) pour out the slag of 30-50 % by weight after having tapped, and carry out the operation of slag splashing; (4) smelting of next stove half steel is carried out in circulation step (1)-(3).
According to method provided by the invention, the object that can realize dephosphorization and protect carbon.In addition, the circulation that utilizes a upper stove terminal slag can carry out half steel is smelted, and has improved dephosphorization effect, and has effectively reduced the usage quantity of quickened lime, high magnesium lime and acid composite fluxing medium, has reduced the production cost of semisteel smelting.
Other features and advantages of the present invention partly in detail are described the embodiment subsequently.
Embodiment
Below the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
In the present invention, in the situation that not doing contrary explanation, described basicity of slag is CaO and SiO
2the ratio of weight percentage, i.e. R=CaO/SiO
2, wherein, CaO does not comprise the CaO in acid composite fluxing medium; ; " the m of unit
3/ (ton steel min) " refer to respect to half steel molten steel per ton the gas flow of per minute (in standard volume).
A kind of method that the invention provides semisteel smelting medium carbon steel, the method comprises:
(1) in stove, add quickened lime, high magnesium lime and acid composite fluxing medium be blended into half steel in converter after, top blast oxygen blows, basicity of slag in converter is adjusted to 2-2.5, blows and when carbon content in molten steel is 1.0-1.5 % by weight, outwell slag;
(2) under the condition blowing at top blast oxygen, again in stove, add quickened lime, high magnesium lime and acid composite fluxing medium, the basicity of slag in converter is adjusted to 3-4, then carry out Terminal Process Control tapping;
(3) pour out the slag of 30-50 % by weight after having tapped, and carry out the operation of slag splashing;
(4) smelting of next stove half steel is carried out in circulation step (1)-(3).
In the present invention, described medium carbon steel refers to that finished product carbon content is at the steel grade of 0.25-0.5 % by weight.
The present inventor finds under study for action, be blended into half steel in converter after, add quickened lime, high magnesium lime and acid composite fluxing medium, top blast oxygen blows, basicity of slag in converter is adjusted to 2-2.5, blow, slag making fast, blow to carbon content in molten steel be 1.0-1.5 % by weight, now slag oxidation is not high, good fluidity, being beneficial to slag pours out, now slag is rich phosphorus slag, slag is all outwelled, thereby realize effective dephosphorization of molten steel, all outwell slag has also avoided the accumulation of phosphorus in slag to be beneficial to circulation smelting process simultaneously.In described molten steel, the measuring method of carbon content can be also the conventional method of using in this area, and under preferable case, in described molten steel, the measurement of carbon content is used sublance to measure.
In the present invention, in step (1) and step (2), add the order of quickened lime, high magnesium lime and acid composite fluxing medium to be not particularly limited, as long as make the basicity of slag in converter be adjusted to described basicity, for example can be for add quickened lime, high magnesium lime and acid composite fluxing medium to make basicity of slag in converter be adjusted to required basicity or first add quickened lime and high magnesium lime to add again acid composite fluxing medium to make basicity of slag in converter be adjusted to required basicity simultaneously.Under preferable case, the order that adds quickened lime, high magnesium lime and acid composite fluxing medium for first adding quickened lime and high magnesium lime to add composite fluxing medium again so that basicity of slag is adjusted to required basicity in converter.
In the present invention, for quickened lime, high magnesium lime and acid composite fluxing medium, be not particularly limited, under preferable case, in step (1), when semisteel smelting is the first stove smelting, the add-on of described quickened lime is 10-15kg/ ton steel, and the add-on of described high magnesium lime is 10-12kg/ ton steel; Circulation is smelted while smelting since the second stove, and the add-on of described quickened lime is 5-10kg/ ton steel, and the add-on of described high magnesium lime is 4-7kg/ ton steel, and it is 2-2.5 that the add-on of described acid composite fluxing medium makes basicity of slag in converter; In step (2), the add-on of described quickened lime is 6-10kg/ ton steel, and the add-on of described high magnesium lime is 5-8kg/ ton steel, and it is 3-4 that the add-on of described acid composite fluxing medium makes basicity of slag in converter.
In the present invention, under preferable case, in step (1), the condition of top blast oxygen comprises: oxygen supply intensity is 3-3.5m
3/ (ton steel min), the rifle position of oxygen rifle is 1.5-2.5m; In step (2), the condition of top blast oxygen comprises: oxygen supply intensity is 2.5-3m
3/(ton steel min), the rifle position of oxygen rifle is 1.4-1.8m.
In the present invention, for the number of times circulating, there is no particular limitation, and under preferable case, cycle index is 5-7 time.
In the present invention, for described quickened lime, high magnesium lime and acid composite fluxing medium, do not have special requirement, can be conventional quickened lime, high magnesium lime and the acid composite fluxing medium using in this area, for example, described quickened lime can be the quickened lime of content>=85 % by weight of CaO; Described high magnesium lime can be the high magnesium lime of the MgO of the CaO that contains 45-55 % by weight and 30-50 % by weight; Described acid composite fluxing medium can be for containing the SiO of 60-75 % by weight
2, the CaO of 10-15 % by weight is, the FeO of the MgO of 1-3 % by weight, 7-15 % by weight and the Fe of 1-37 % by weight
2o
3acid composite fluxing medium.
In the present invention, in order further to ensure the quality of tapping molten steel, under preferable case, in step (1) and step (2), converting process also comprises bottom blowing nitrogen or argon gas.For bottom blowing nitrogen or argon gas, do not have special requirement, for example, in step (1), the intensity of bottom blowing nitrogen or argon gas is 0.03-0.05m
3/ (ton steel min); In step (2), the intensity of bottom blowing nitrogen or argon gas is 0.05-0.08m
3/ (ton steel min).
In the present invention, under preferable case, described Terminal Process Control comprises: tapping molten steel is that in 1630-1650 ℃, molten steel, carbon content is that 0.15-0.3 % by weight and phosphorus content are 0.006-0.015 % by weight.
In the present invention, described half steel can be the half steel after vanadium extraction, and the half steel after described vanadium extraction can contain: the C that is more than or equal to 3.5 % by weight, the Si of 0-0.01 % by weight, the Mn of 0-0.04 % by weight, the P of 0.05-0.09 % by weight, the S of 0.005-0.02 % by weight and the Fe of surplus; Under preferable case, the half steel after described vanadium extraction can contain: the C of 3.5-4 % by weight, the Si of 0-0.1 % by weight, the Mn of 0-0.04 % by weight, the P of 0.05-0.09 % by weight, the Fe of the S of 0.005-0.02 % by weight and 95.4-96.4 % by weight.The temperature of the half steel after described vanadium extraction can be more than or equal to 1300 ℃, is preferably 1300-1360 ℃.
Below will describe the present invention by embodiment.
Embodiment 1
The present embodiment is for illustrating the method for semisteel smelting medium carbon steel provided by the invention.
In the present embodiment, quickened lime is the quickened lime of the CaO that contains 85 % by weight; High magnesium lime is the high magnesium lime of the CaO of the MgO that contains 38 % by weight and 55 % by weight; Acid composite fluxing medium is the SiO that contains 70 % by weight
2, the CaO of 13 % by weight is, the FeO of the MgO of 3 % by weight, 15 % by weight and the Fe of 1 % by weight
2o
3acid composite fluxing medium.
Steel-making converter nominal capacity is 120t.Half steel C content after vanadium extraction is 3.5 % by weight, and Si content is 0.01 % by weight, Mn content 0.04 % by weight, and P content is 0.05 % by weight, and S content is 0.005 % by weight, and temperature is 1300 ℃, and weight is 130t.
(1) half steel after vanadium extraction is directly blended into converter, in converter, add ton quickened lime of steel 10kg and a ton high magnesium lime of steel 10kg, then add acid composite fluxing medium working the slag basicity 2, top blast oxygen and argon bottom-blowing blow simultaneously, blow while being 1.5 % by weight to carbon content of molten steel, outwell slag.Wherein, the condition of top blast oxygen comprises: oxygen lance position is 2m, and the intensity of top blast oxygen is 3.5m
3/ (ton steel min); The condition of argon bottom-blowing comprises: the intensity of argon bottom-blowing is 0.03m
3/ ton steel min.
(2) then, under the condition blowing at top blast oxygen and argon bottom-blowing, again add ton steel 6kg quickened lime and ton steel 5kg high magnesium lime, then adding acid composite fluxing medium working the slag basicity is 3, blowing 3min carries out Terminal Process Control, and to obtain temperature be 1650 ℃, carbon content is 0.15 % by weight, and phosphorus content is the endpoint molten steel of 0.006 % by weight; Wherein, the condition of top blast oxygen comprises: oxygen lance position is 1.4m, and the intensity of top blast oxygen is 2.5m
3/ (ton steel min); The condition of argon bottom-blowing comprises: the intensity of argon bottom-blowing is 0.05m
3/ ton steel min.
(3) pour out the slag of 50 % by weight after having tapped, and carry out the operation of slag splashing.
Complete after above-mentioned steps (3), the smelting of next stove half steel is carried out in circulation step (1)-(3), different is, the high magnesium lime that adds ton quickened lime of steel 5kg and ton steel 4kg in step (1), carrying out Terminal Process Control, to obtain temperature be 1641 ℃, carbon content is 0.18 % by weight, and phosphorus content is the endpoint molten steel of 0.009 % by weight.
Embodiment 2
In the present embodiment, quickened lime is the quickened lime of the CaO that contains 88 % by weight; High magnesium lime is the high magnesium lime of the CaO of the MgO that contains 30 % by weight and 55 % by weight; Acid composite fluxing medium is the SiO that contains 75 % by weight
2, the CaO of 10 % by weight is, the FeO of the MgO of 3 % by weight, 10 % by weight and the Fe of 1 % by weight
2o
3acid composite fluxing medium.
Steel-making converter nominal capacity is 120t.Half steel C content after vanadium extraction is 3.6 % by weight, and Si content is 0.01 % by weight, Mn content 0.03 % by weight, and P content is 0.07 % by weight, and S content is 0.015 % by weight, and temperature is 1310 ℃, and weight is 130t.
(1) half steel after vanadium extraction is directly blended into converter, in converter, add ton quickened lime of steel 13kg and a ton high magnesium lime of steel 11kg, then add acid composite fluxing medium working the slag basicity 2.3, top blast oxygen and argon bottom-blowing blow simultaneously, blow while being 1.25 % by weight to carbon content of molten steel, outwell slag.Wherein, the condition of top blast oxygen comprises: oxygen lance position is 2.5m, and the intensity of top blast oxygen is 3m
3/ (ton steel min); The condition of argon bottom-blowing comprises: the intensity of argon bottom-blowing is 0.04m
3/ ton steel min.
(2) then, under the condition blowing at top blast oxygen and argon bottom-blowing, again add ton steel 8kg quickened lime and ton steel 6kg high magnesium lime, then adding acid composite fluxing medium working the slag basicity is 3.5, blowing 3.5min carries out Terminal Process Control, and to obtain temperature be 1640 ℃, carbon content is 0.25 % by weight, and phosphorus content is the endpoint molten steel of 0.01 % by weight; Wherein, the condition of top blast oxygen comprises: oxygen lance position is 1.6m, and the intensity of top blast oxygen is 3m
3/ (ton steel min); The condition of argon bottom-blowing comprises: the intensity of argon bottom-blowing is 0.065m
3/ ton steel min.
(3) pour out the slag of 30 % by weight after having tapped, and carry out the operation of slag splashing.
Complete after above-mentioned steps (3), the smelting of next stove half steel is carried out in circulation step (1)-(3), different is, the high magnesium lime that adds ton quickened lime of steel 7kg and ton steel 5kg in step (1), carrying out Terminal Process Control, to obtain temperature be 1643 ℃, carbon content is 0.24 % by weight, and phosphorus content is the endpoint molten steel of 0.011 % by weight.
Embodiment 3
In the present embodiment, quickened lime is the quickened lime of the CaO that contains 85 % by weight; High magnesium lime is the high magnesium lime of the CaO of the MgO that contains 50 % by weight and 45 % by weight; Acid composite fluxing medium is the SiO that contains 60 % by weight
2, the CaO of 15 % by weight is, the FeO of the MgO of 1 % by weight, 15 % by weight and the Fe of 1 % by weight
2o
3acid composite fluxing medium.
Steel-making converter nominal capacity is 120t.Half steel C content after vanadium extraction is 3.62 % by weight, and Si content is 0.01 % by weight, Mn content 0.03 % by weight, and P content is 0.09 % by weight, and S content is 0.02 % by weight, and temperature is 1325 ℃, and weight is 130t.
(1) half steel after vanadium extraction is directly blended into converter, in converter, add ton quickened lime of steel 15kg and a ton high magnesium lime of steel 12kg, then add acid composite fluxing medium working the slag basicity 2.5, top blast oxygen and argon bottom-blowing blow simultaneously, blow while being 1 % by weight to carbon content of molten steel, outwell slag.Wherein, the condition of top blast oxygen comprises: oxygen lance position is 1.5m, and the intensity of top blast oxygen is 3.3m
3/ (ton steel min); The condition of argon bottom-blowing comprises: the intensity of argon bottom-blowing is 0.05m
3/ ton steel min.
(2) then, under the condition blowing at top blast oxygen and argon bottom-blowing, again add ton steel 10kg quickened lime and ton steel 8kg high magnesium lime, then adding acid composite fluxing medium working the slag basicity is 4, blowing 3.5min carries out Terminal Process Control, and to obtain temperature be 1630 ℃, carbon content is 0.3 % by weight, and phosphorus content is the endpoint molten steel of 0.015 % by weight; Wherein, the condition of top blast oxygen comprises: oxygen lance position is 1.8m, and the intensity of top blast oxygen is 2.8m
3/ (ton steel min); The condition of argon bottom-blowing comprises: the intensity of argon bottom-blowing is 0.08m
3/ ton steel min.
(3) pour out the slag of 40 % by weight after having tapped, and carry out the operation of slag splashing.
Complete after above-mentioned steps (3), the smelting of next stove half steel is carried out in circulation step (1)-(3), different is, the high magnesium lime that adds ton quickened lime of steel 10kg and ton steel 7kg in step (1), carrying out Terminal Process Control, to obtain temperature be 1633 ℃, carbon content is 0.29 % by weight, and phosphorus content is the endpoint molten steel of 0.012 % by weight.
By embodiment 1-3, can be found out, according to method provided by the invention, effectively dephosphorization and guarantor's carbon are realized semisteel smelting medium carbon steel.Meanwhile, the circulation that the part slag of a upper stove terminal is carried out to half steel for next stove is smelted, and has reduced the use of slag making materials, has saved cost.
More than describe the preferred embodiment of the present invention in detail; but the present invention is not limited to the detail in above-mentioned embodiment, within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, between various embodiment of the present invention, also can carry out arbitrary combination, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. a method for semisteel smelting medium carbon steel, is characterized in that, the method comprises:
(1) in stove, add quickened lime, high magnesium lime and acid composite fluxing medium be blended into half steel in converter after, top blast oxygen blows, basicity of slag in converter is adjusted to 2-2.5, blows and when carbon content in molten steel is 1.0-1.5 % by weight, outwell slag;
(2) under the condition blowing at top blast oxygen, again in stove, add quickened lime, high magnesium lime and acid composite fluxing medium, the basicity of slag in converter is adjusted to 3-4, then carry out Terminal Process Control tapping;
(3) pour out the slag of 30-50 % by weight after having tapped, and carry out the operation of slag splashing;
(4) smelting of next stove half steel is carried out in circulation step (1)-(3).
2. method according to claim 1, wherein, in step (1), when semisteel smelting is the first stove while smelting, the add-on of described quickened lime is 10-15kg/ ton steel, the add-on of described high magnesium lime is 10-12kg/ ton steel; Circulation is smelted while smelting since the second stove, and the add-on of described quickened lime is 5-10kg/ ton steel, and the add-on of described high magnesium lime is 4-7kg/ ton steel.
3. method according to claim 1, wherein, in step (2), the add-on of described quickened lime is 6-10kg/ ton steel, the add-on of described high magnesium lime is 5-8kg/ ton steel.
4. method according to claim 1, wherein, in step (1), the condition of top blast oxygen comprises: oxygen supply intensity is 3-3.5m
3/ (ton steel min), the rifle position of oxygen rifle is 1.5-2.5m.
5. method according to claim 1, wherein, in step (2), the condition of top blast oxygen comprises: oxygen supply intensity is 2.5-3m
3/ (ton steel min), the rifle position of oxygen rifle is 1.4-1.8m.
6. according to the method described in any one in claim 1-3, wherein, content >=85 % by weight of CaO in described quickened lime;
The MgO of the CaO that described high magnesium lime contains 45-55 % by weight and 30-50 % by weight;
The SiO that described acid composite fluxing medium contains 60-75 % by weight
2, the CaO of 10-15 % by weight is, the FeO of the MgO of 1-3 % by weight, 7-15 % by weight and the Fe of 1-37 % by weight
2o
3.
7. method according to claim 1, in step (1) and step (2), converting process also comprises bottom blowing nitrogen or argon gas.
8. method according to claim 7, wherein, in step (1), the intensity of bottom blowing nitrogen or argon gas is 0.03-0.05m
3/ (ton steel min).
9. method according to claim 7, wherein, in step (2), the intensity of bottom blowing nitrogen or argon gas is 0.05-0.08m
3/ (ton steel min).
10. method according to claim 1, wherein, described Terminal Process Control comprises: tapping molten steel is that in 1630-1650 ℃, molten steel, carbon content is that 0.15-0.3 % by weight and phosphorus content are 0.006-0.015 % by weight.
11. methods according to claim 1, wherein, described half steel is the half steel after vanadium extraction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410188279.0A CN103966399B (en) | 2014-05-06 | 2014-05-06 | A kind of method of semisteel smelting medium carbon steel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410188279.0A CN103966399B (en) | 2014-05-06 | 2014-05-06 | A kind of method of semisteel smelting medium carbon steel |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103966399A true CN103966399A (en) | 2014-08-06 |
| CN103966399B CN103966399B (en) | 2016-08-10 |
Family
ID=51236399
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410188279.0A Expired - Fee Related CN103966399B (en) | 2014-05-06 | 2014-05-06 | A kind of method of semisteel smelting medium carbon steel |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103966399B (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805249A (en) * | 2015-05-20 | 2015-07-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Slagging method of double slag-remaining slag semi-steel steelmaking |
| CN105483313A (en) * | 2016-01-16 | 2016-04-13 | 河北钢铁股份有限公司承德分公司 | Semi-steel making method |
| CN108774660A (en) * | 2018-07-02 | 2018-11-09 | 攀钢集团攀枝花钢铁研究院有限公司 | The smelting process of DTLA steel |
| CN108796164A (en) * | 2018-07-02 | 2018-11-13 | 攀钢集团攀枝花钢铁研究院有限公司 | The smelting process of No. 45 steel |
| CN109913613A (en) * | 2019-04-01 | 2019-06-21 | 攀钢集团攀枝花钢铁研究院有限公司 | The half steel of rapid slagging lacks slag dephosphorization smelting process |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962700A (en) * | 2010-07-29 | 2011-02-02 | 攀钢集团有限公司 | Method for smelting low-phosphorous molten steel by utilizing semisteel |
| CN102071277A (en) * | 2010-12-23 | 2011-05-25 | 攀钢集团钢铁钒钛股份有限公司 | Converter dephosphorizing and steelmaking method |
| CN102199682A (en) * | 2011-04-13 | 2011-09-28 | 攀钢集团钢铁钒钛股份有限公司 | Semisteel steelmaking method |
| CN102304606A (en) * | 2011-09-09 | 2012-01-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Slag former and slagging method for semisteel steelmaking |
| CN102329921A (en) * | 2011-09-30 | 2012-01-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Semi-steel making method |
| CN103498017A (en) * | 2013-09-23 | 2014-01-08 | 攀钢集团西昌钢钒有限公司 | Semi-steel converter steelmaking method |
| CN103627842A (en) * | 2013-11-14 | 2014-03-12 | 攀钢集团研究院有限公司 | Method for enhancing end point carbon content in smelting medium-carbon steel from semisteel and semisteel steelmaking method |
-
2014
- 2014-05-06 CN CN201410188279.0A patent/CN103966399B/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101962700A (en) * | 2010-07-29 | 2011-02-02 | 攀钢集团有限公司 | Method for smelting low-phosphorous molten steel by utilizing semisteel |
| CN102071277A (en) * | 2010-12-23 | 2011-05-25 | 攀钢集团钢铁钒钛股份有限公司 | Converter dephosphorizing and steelmaking method |
| CN102199682A (en) * | 2011-04-13 | 2011-09-28 | 攀钢集团钢铁钒钛股份有限公司 | Semisteel steelmaking method |
| CN102304606A (en) * | 2011-09-09 | 2012-01-04 | 攀钢集团攀枝花钢铁研究院有限公司 | Slag former and slagging method for semisteel steelmaking |
| CN102329921A (en) * | 2011-09-30 | 2012-01-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Semi-steel making method |
| CN103498017A (en) * | 2013-09-23 | 2014-01-08 | 攀钢集团西昌钢钒有限公司 | Semi-steel converter steelmaking method |
| CN103627842A (en) * | 2013-11-14 | 2014-03-12 | 攀钢集团研究院有限公司 | Method for enhancing end point carbon content in smelting medium-carbon steel from semisteel and semisteel steelmaking method |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104805249A (en) * | 2015-05-20 | 2015-07-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Slagging method of double slag-remaining slag semi-steel steelmaking |
| CN105483313A (en) * | 2016-01-16 | 2016-04-13 | 河北钢铁股份有限公司承德分公司 | Semi-steel making method |
| CN108774660A (en) * | 2018-07-02 | 2018-11-09 | 攀钢集团攀枝花钢铁研究院有限公司 | The smelting process of DTLA steel |
| CN108796164A (en) * | 2018-07-02 | 2018-11-13 | 攀钢集团攀枝花钢铁研究院有限公司 | The smelting process of No. 45 steel |
| CN109913613A (en) * | 2019-04-01 | 2019-06-21 | 攀钢集团攀枝花钢铁研究院有限公司 | The half steel of rapid slagging lacks slag dephosphorization smelting process |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103966399B (en) | 2016-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101696462B (en) | Method for producing low phosphorus steel by smelting semisteel | |
| CN103060512B (en) | Dephosphorizing and steelmaking method of medium-high-phosphorous semisteel by top-blown converter | |
| CN103205524A (en) | Method for smelting low-sulfur steel from semi-steel | |
| CN103966399A (en) | Method of utilizing semisteel to smelt medium-carbon steel | |
| CN105112595A (en) | Smelting method capable of realizing phosphorus content of less than 70ppm in high-carbon converter tapping | |
| CN104928431A (en) | Method for single slag smelting low-carbon high-phosphorus and high-weathering steel by adopting combined blown converter | |
| CN103320566B (en) | Double slag process smelts the method for half steel | |
| CN103627843B (en) | Semi-steel making slagging method and Semi-steel making method | |
| CN103866077B (en) | The two slag of a kind of semi-steel making stays the method for making steel of slag | |
| CN105671248A (en) | Smelting method of converter efficient dephosphorization | |
| CN103627842A (en) | Method for enhancing end point carbon content in smelting medium-carbon steel from semisteel and semisteel steelmaking method | |
| CN103966389B (en) | A kind of method of semisteel smelting high carbon steel | |
| CN102952915B (en) | Converter smelting method of phosphorus-containing steel | |
| CN103642971A (en) | Method for improving steelmaking end-point carbon content of semisteel and semisteel steelmaking method | |
| CN104060020B (en) | A kind of dephosphorization method for making steel improving converter terminal molten steel Fe content | |
| CN103409595B (en) | Dephosphorization and steel-making method of vanadium-containing molten iron | |
| CN103642966B (en) | Method for improving high-carbon high-manganese steel converter smelting endpoint carbon content and steelmaking method | |
| CN105132611A (en) | Method for producing ultra-low phosphorous steel through single slag of converter | |
| CN105087851A (en) | Method for smelting high-carbon steel with semisteel | |
| CN102094103B (en) | Method for increasing endpoint carbon content of converter | |
| CN104109727B (en) | The method of half steel converter smelting Low-phosphorus Steel | |
| CN103627851A (en) | Semisteel steelmaking temperature control method and semisteel steelmaking method | |
| CN110564908A (en) | double-slag dephosphorization and steel-making method for semisteel converter | |
| CN105177217A (en) | Process for reducing steel slag quantity during converter smelting | |
| CN108676954A (en) | A kind of interior dephosphorization method for making steel recycled of converter steel slag hearth |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160810 Termination date: 20170506 |