CN103627843A - Slagging method in semisteel steelmaking and semisteel steelmaking method - Google Patents
Slagging method in semisteel steelmaking and semisteel steelmaking method Download PDFInfo
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- CN103627843A CN103627843A CN201310629791.XA CN201310629791A CN103627843A CN 103627843 A CN103627843 A CN 103627843A CN 201310629791 A CN201310629791 A CN 201310629791A CN 103627843 A CN103627843 A CN 103627843A
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Abstract
The invention provides a slagging method in semisteel steelmaking and a semisteel steelmaking method. The slagging method comprises the following steps: adding active lime at a ratio of 5-9Kg/t steel and high-magnesium lime at a ratio of 9-13Kg/t steel to a converter after finishing converter blowing and carrying out slag-splashing protection and slag remaining operation; adding semisteel to the converter, and adding active lime at a ratio of 5-9Kg/t steel, high-magnesium lime at a ratio of 9-13Kg/t steel, a high-aluminum slagging agent at a ratio of 12-15Kg/t steel and an enriched sludge ball at a ratio of 6-8Kg/t steel after adding the semisteel; blowing by a top-blown oxygen gun. After the slagging method disclosed by the invention is adopted, the problems that a converter steelmaking method of the semisteel is difficult in slagging, low in slag speed and the like can be solved, and the targets of quickly slagging employing a semisteel converter and reducing consumption of steelmaking auxiliary materials are achieved.
Description
Technical field
The present invention relates to converter semi-steel making technical field, more particularly, relate to the quick slagging method of a kind of semi-steel making and a kind of Semi-steel making method that uses this semi-steel making slagging method to carry out slag making.
Background technology
Converter slag-making is exactly that the slag that affinability is strong has been made in requirement as early as possible, early changes slag while so just requiring to blow, and has changed slag.
Converter slagging speed depends primarily on the burn-off rate in the initial stage acid slag that lime silicon and manganese oxidation when blowing starts form.Along with the lime melting in acid slag in the early stage, the basicity of slag also increases thereupon.When slag alkalescence improves, slag becomes alkalescence from acidity, enters people's Dicalcium Phosphate (Feed Grade) solid phase area, occurs Dicalcium Phosphate (Feed Grade) crystallization in slag, and around crusts at lime.Dicalcium Phosphate (Feed Grade) fusing point is up to 2130 ℃, and very difficult melting at steel-making temperature, has hindered the new slag of part and contacted with lime, thereby has reduced the fusing speed of lime.Thereby, in the slagging process of semi-steel making, existenceization slag difficulty, carry out the problems such as slag speed is slow, finishing slag TFe content is higher.
Summary of the invention
For the deficiencies in the prior art, one of object of the present invention is to solve the one or more problems that exist in above-mentioned prior art.
One of object of the present invention is to provide a kind of can solve semi-steel making process slag difficulty in prior art, carry out the slow-footed slagging method of slag.
To achieve these goals, an aspect of of the present present invention provides a kind of semi-steel making slagging method.Described slagging method comprises the following steps: in converter a heat finishing blowing and carry out slag splashing remaining slag operation after, in converter, add 5～9Kg/t
steelquickened lime and 9～13Kg/t
steelhigh magnesium lime; In converter, be blended into half steel, and add 5～9Kg/t after half steel has been converted
steelquickened lime, 9～13Kg/t
steelhigh magnesium lime, 12～15Kg/t
steelhigh alumina slag former and 6～8Kg/t
steelenrichment sludge ball; Lower top blow oxygen lance blowing.
Semi-steel making slagging method embodiment according to the present invention, the composition of described half steel comprises by mass percentage 3.2～4.1% C, 0.015～0.030% Si, 0.02～0.04% Mn, 0.06～0.08% P and is not more than 0.015% S, and temperature when it is blended into converter is 1300～1360 ℃.
Semi-steel making slagging method embodiment according to the present invention, described enrichment sludge ball comprises 45～60% FeO, 8～15% Fe by mass percentage
2o
3, 5～10% MFe, 5～8% CaO, 10～12% SiO
2, 1～3% Al
2o
3, 1～2% MnO, 3～5% MgO, be less than 0.2% P, be less than 0.05% S, be less than 1% moisture and inevitable impurity.
Semi-steel making slagging method embodiment according to the present invention, the granularity of described enrichment sludge ball is 10～80mm.
Semi-steel making slagging method embodiment according to the present invention, described high alumina slag former comprises 45～48% SiO by mass percentage
2, 3～7% MgO, 3～5% CaO, be greater than 12% TFe, 3～8% MnO, 5～8% Al
2o
3, be less than 0.1% P, be less than 0.1% S, be less than 1% moisture and inevitable impurity.
Semi-steel making slagging method embodiment according to the present invention, described quickened lime contains 85～90% CaO by mass percentage.
Semi-steel making slagging method embodiment according to the present invention, described high magnesium lime contains 48～55% CaO and 30～40% MgO by mass percentage.
Semi-steel making slagging method embodiment according to the present invention, described lower top blow oxygen lance blowing comprises: in the 90s after blowing starts, the oxygen supply intensity of controlling top blow oxygen lance is 1.5～2.5m
3/ (mint
steel), oxygen lance position is 1.5～2.5m; While reaching 0.40～0.80% to the carbon content of molten steel in converter after blowing starts 90s, the oxygen supply intensity of controlling top blow oxygen lance is 2.5～3.5m
3/ (mint
steel), oxygen lance position is 1.8～2.5m; Carbon content of molten steel in converter reaches 0.40～0.80% to blow end point, and the oxygen supply intensity of controlling top blow oxygen lance is 1.5～2.0m
3/ (mint
steel), oxygen lance position is 1.4～2m.
Semi-steel making slagging method embodiment according to the present invention, described slag splashing remaining slag operation is included in to be bessemerized after end, and tapping is also stayed slag in converter, then adds 3～5Kg/t
steelquickened lime slag is wrapped up in dry.
The present invention has improved a kind of Semi-steel making method on the other hand.Described Semi-steel making method adopts semi-steel making slagging method as above to carry out slag making.
Compared with prior art, beneficial effect of the present invention comprises: solved existingization of semisteel converter steelmaking method slag difficulty and carried out the problems such as slag speed is slow, reached half steel converter rapid slagging, reduced the object that steelmaking ingredient consumes.
Embodiment
Hereinafter, in connection with exemplary embodiment, describe in detail according to semi-steel making slagging method of the present invention and Semi-steel making method.In the present invention, if there is no the statement of exception, in the material of conventionally mentioning, the content of each element or composition is all quality percentage compositions.
In one exemplary embodiment, the slagging process of semi-steel making specifically comprises:
(1) half steel water
Half steel refers to the molten iron that vanadium-bearing hot metal obtains after desulfurization and vanadium extraction processing, and its composition comprises by percentage to the quality: C:3.2～4.1%, Si:0.015～0.030%, Mn:0.02～0.04%, P:0.06～0.08%, S≤0.015%, temperature when it is blended into converter is 1300～1360 ℃.
The converter Intake Quantity adopting is 125～145 tons.
(2) slag making auxiliary material
The slag making auxiliary material adopting comprises quickened lime, high magnesium lime, high alumina slag former and enrichment sludge ball, wherein, and each slag making auxiliary material consisting of by percentage to the quality: contain 85～90% CaO in quickened lime; In high magnesium lime, contain 48～55% CaO and 30～40% MgO; The composition of high alumina slag former comprises 45～48% SiO
2, 3～7% MgO, 3～5% CaO, be greater than 12% TFe, 3～8% MnO, 5～8% Al
2o
3, be less than 0.1% P, be less than 0.1% S, be less than 1% moisture and inevitable impurity; Enrichment sludge ball contains 45～60% FeO, 8～15% Fe
2o
3, 5～10% MFe, 5～8% CaO, 10～12% SiO
2, 1～3% Al
2o
3, 1～2% MnO, 3～5% MgO, be less than 0.2% P, be less than 0.05% S, be less than 1% moisture and inevitable impurity, the granularity of enrichment sludge ball is 10～80mm.
(3) technological process
1. normal running when smelting the first stove, stays slag after finishing blowing slag splashing.From smelting the second stove, before converter hot metal charging, first add first required auxiliary material of steel-making, wherein, first auxiliary material comprises quickened lime and high magnesium lime, quickened lime add-on is controlled at 5～9Kg/t
steel, high magnesium lime add-on is controlled at 9～13Kg/t
steel.After utilizing the remaining gentle slag splashing of a upper stove smelting converter, stay the remaining temperature of slag by first auxiliary material temperature increase, and make the auxiliary material and the upper slag-metal reaction that stove stays that add.
2. in converter, be blended into half steel, add successively second batch auxiliary material after having converted half steel again, wherein, second batch auxiliary material comprises quickened lime, high magnesium lime, high alumina slag former and enrichment sludge ball, and quickened lime add-on is controlled at 5～9Kg/t
steel, high magnesium lime add-on is controlled at 9～13Kg/t
steel, high alumina slag former add-on is controlled at 12～15Kg/t
steel, enrichment sludge ball add-on is controlled at 6～8Kg/t
steel.Add opportunity and the add-on of above-mentioned two batches of slag charges are controlled at this scope in order to accelerate the fusing of lime, too much can cause bath temperature to decline too much if add, and cause slag charge conglomeration and lime block surface to form layer of metal scull and postpone slagging; Added and do not reach at least dephosphorization effect.
3. at lower top blast oxygen, carry out in the process of oxygen blast blowing, total blowing is controlled principle and is: Fast Slag Melting, and morningization slag, slag is active, and process is not returned dry, not splash.
Before blowing, 90s top blow oxygen lance oxygen supply intensity is 1.5～2.5m
3/ (mint
steel), oxygen lance position is 1.5～2.5m.It is not also very violent opening the interior reaction between carbon and oxygen of stove while blowing, the amount of oxygen consuming is less, now employing " low oxygen supply intensity, higher rifle position " is in order to improve the oxidisability of slag on the one hand, prevents that decarburization in early stage from heating up violent, causes the too fast dephosphorization that is unfavorable for of bath temperature rising; Prevent from the other hand early stage from because the too low blowing in rifle position causes, returning dry.
When oxygen blast 90s is 0.40～0.80% to the carbon content of molten steel in converter, controlling top blow oxygen lance oxygen supply intensity is 2.5～3.5m
3/ (mint
steel), oxygen lance position is 1.8～2.5m.Now because carbon content in molten steel is lower, there is conversion in the factor that affects decarburizing reaction speed, from depending on that oxygen supply intensity is converted to the velocity of diffusion that depends on carbon, oxygen supply intensity has not played obvious effect to decarbonization rate, in this case, increase bubble-metal interface (as being blown into gas) and increase stirring intensity of molten pool, can improve decarbonization rate.
From carbon content of molten steel, be 0.40～0.80% during to blow end point, the oxygen supply intensity of controlling top blow oxygen lance is 1.5～2.0m
3/ (mint
steel), oxygen lance position is 1.4～2m.Due in smelting the later stage in order to increase the needs of stirring, should adopt larger air supply intensity and lower oxygen lance position.
Smelting endpoint no longer carries out deslagging after having gone out steel, slag is stayed in converter, and added 3～5Kg/t
steelquickened lime slag is wrapped up in dry, and use semi-steel making slagging method as above to carry out the smelting of next heat.
Adopt above-mentioned slagging process to have the following advantages:
1. in the enrichment sludge ball adding early stage and high alumina slag former, contain ferric oxide and can make Primary period molten bath oxidisability strengthen, be conducive to dephosphorization in early stage.
2. the Al containing in high alumina slag former and enrichment sludge ball
2o
3, FeO, Fe
2o
3, MnO disintegrates Dicalcium Phosphate (Feed Grade), can make the reduced viscosity of slag, promotionization slag.
3. after a upper stove slag splashing, stay slag, then add quickened lime and high magnesium lime, can make auxiliary material temperature rising in early stage, oxidisability strengthens, being more conducive to slag.
4. stay slag steelmaking ingredient to consume compared with normal and smelt heat reduction by 20～30%.
Semi-steel making method according to a further aspect of the invention adopts semi-steel making slagging process as above to carry out slag making.
In order to understand better above-mentioned exemplary embodiment of the present invention, below in conjunction with concrete example, it is further described.
Example 1
Certain 200t of factory converter adopts semi-steel making, wherein, enters stove half steel hot metal composition and temperature as shown in table 1.
Table 1 enter stove half steel hot metal composition (%) and charging temperature (℃)
| ? | C | Si | Mn | P | S | Charging temperature |
| Half steel water | 3.3 | 0.015 | 0.03 | 0.06 | 0.012 | 1300 |
Normal running when converter the first stove is smelted, stays slag after finishing blowing slag splashing.Since the second stove, smelt, before converting half steel to converter, first add first required auxiliary material of steel-making, comprise 5Kg/t
steelquickened lime and 9Kg/t
steelhigh magnesium lime.In converter, be blended into half steel, add successively again second batch auxiliary material after having converted half steel, comprise 5Kg/t
steelquickened lime, 9Kg/t
steelhigh magnesium lime, 12Kg/t
steelhigh alumina slag former and 6Kg/t
steelenrichment sludge ball.
Wherein, two batches of slag making auxiliary materials composition is by percentage to the quality: in quickened lime, contain 90% CaO; In high magnesium lime, contain 55% CaO and 30% MgO; The composition of high alumina slag former comprises 48% SiO
2, 3% MgO, 3% CaO, 18% TFe, 8% MnO, 8% Al
2o
3, 0.08% P, 0.09% S and 0.5% H
2o, all the other are inevitable impurity; Enrichment sludge ball contains 59% FeO, 8% Fe
2o
3, 8% MFe, 5% CaO, 10% SiO
2, 1% Al
2o
3, 2% MnO, 3% MgO, 0.1% P, 0.04% S, 0.08% moisture and inevitable impurity, the granularity of enrichment sludge ball is 40mm.
Lower top blast oxygen starts blowing, and wherein, before blowing, 90s top blow oxygen lance oxygen supply intensity is 1.7m
3/ (mint
steel), oxygen lance position is 2.2m.When oxygen blast 90s is 0.5% to carbon content of molten steel, top blow oxygen lance oxygen supply intensity is 2.7m
3/ (mint
steel), oxygen lance position is 1.9m.From carbon content of molten steel, be 0.5% to blow end point, the oxygen supply intensity of controlling top blow oxygen lance is 1.95m
3/ (mint
steel), oxygen lance position is 1.9m, smelting endpoint no longer carries out deslagging after having gone out steel, slag is stayed in converter, and added 4Kg/t
steelquickened lime slag is wrapped up in dry, prepare next stove and smelt, so repeatedly.
Go out composition of steel and tapping temperature is as shown in table 2 below.
Table 2 endpoint molten steel composition (%), tapping temperature (℃) and change the slag time (s)
| ? | C | Si | Mn | P | S | Tapping temperature | Change the slag time |
| Endpoint molten steel | 0.04 | 0.006 | 0.0343 | 0.008 | 0.013 | 1625 | 210 |
Changing the slag time (carrying out the slag time) is 210s, and dephosphorization rate is 86.7%, and slag state is controlled good, and it is qualified that terminal molten steel component is controlled.
Example 2
Certain 200t of factory converter adopts semi-steel making, wherein, enters stove half steel hot metal composition and temperature as shown in table 3.
Table 3 enter stove half steel hot metal composition (%) and charging temperature (℃)
| ? | C | Si | Mn | P | S | Charging temperature |
| Half steel water | 3.5 | 0.02 | 0.025 | 0.07 | 0.010 | 1360 |
Normal running when converter the first stove is smelted, stays slag after finishing blowing slag splashing.Since the second stove, smelt, before converting half steel to converter, first add first required auxiliary material of steel-making, comprise 9Kg/t
steelquickened lime and 13Kg/t
steelhigh magnesium lime.In converter, be blended into half steel, add successively again second batch auxiliary material after having converted half steel, comprise 9Kg/t
steelquickened lime, 13Kg/t
steelhigh magnesium lime, 15Kg/t
steelhigh alumina slag former and 8Kg/t
steelenrichment sludge ball.
Wherein, two batches of slag making auxiliary materials composition is by percentage to the quality: in quickened lime, contain 85% CaO; In high magnesium lime, contain 48% CaO and 40% MgO; The composition of high alumina slag former comprises 45% SiO
2, 7% MgO, 4% CaO, 23% TFe, 3% MnO, 5% Al
2o
3, 0.08% P, 0.09% S and 0.8% H
2o, all the other are inevitable impurity; Enrichment sludge ball contains 50% FeO, 15% Fe
2o
3, 5% MFe, 7% CaO, 12% SiO
2, 2% Al
2o
3, 1% MnO, 5% MgO, 0.1% P, 0.03% S, 0.08% moisture and inevitable impurity, the granularity of enrichment sludge ball is 70mm.
Lower top blast oxygen starts blowing, and wherein, before blowing, 90s top blow oxygen lance oxygen supply intensity is 2.5m
3/ (mint
steel), oxygen lance position is 2.4m.When oxygen blast 90s is 0.5% to carbon content of molten steel, top blow oxygen lance oxygen supply intensity is 3.0m
3/ (mint
steel), oxygen lance position is 2.0m.From carbon content of molten steel, be 0.5% to blow end point, the oxygen supply intensity of controlling top blow oxygen lance is 1.7m
3/ (mint
steel), oxygen lance position is 1.7m, smelting endpoint no longer carries out deslagging after having gone out steel, slag is stayed in converter, and added 5Kg/t
steelquickened lime slag is wrapped up in dry, prepare next stove and smelt, so repeatedly.
Go out composition of steel and tapping temperature is as shown in table 4 below.
Table 4 endpoint molten steel composition (%), tapping temperature (℃) and change the slag time (s)
| ? | C | Si | Mn | P | S | Tapping temperature | Change the slag time |
| Endpoint molten steel | 0.05 | 0.005 | 0.0251 | 0.008 | 0.012 | 1635 | 200 |
Changing the slag time is 200s, and dephosphorization rate is 88.6%, and slag state is controlled good, and it is qualified that terminal molten steel component is controlled.
Example 3
Certain 200t of factory converter adopts semi-steel making, wherein, enters stove half steel hot metal composition and temperature as shown in table 5.
Table 5 enter stove half steel hot metal composition (%) and charging temperature (℃)
| ? | C | Si | Mn | P | S | Charging temperature |
| Half steel water | 4.0 | 0.03 | 0.04 | 0.08 | 0.010 | 1340 |
Normal running when converter the first stove is smelted, stays slag after finishing blowing slag splashing.Since the second stove, smelt, before converting half steel to converter, first add first required auxiliary material of steel-making, comprise 7Kg/t
steelquickened lime and 11Kg/t
steelhigh magnesium lime.In converter, be blended into half steel, add successively again second batch auxiliary material after having converted half steel, comprise 7Kg/t
steelquickened lime, 11Kg/t
steelhigh magnesium lime, 14Kg/t
steelhigh alumina slag former and 7.5Kg/t
steelenrichment sludge ball.
Wherein, two batches of slag making auxiliary materials composition is by percentage to the quality: in quickened lime, contain 87% CaO; In high magnesium lime, contain 50% CaO and 35% MgO; The composition of high alumina slag former comprises 46% SiO
2, 5% MgO, 5% CaO, 15% TFe, 5% MnO, 7% Al
2o
3, 0.08% P, 0.09% S and 0.6% H
2o, all the other are inevitable impurity; Enrichment sludge ball contains 46% FeO, 15% Fe
2o
3, 8% MFe, 8% CaO, 11% SiO
2, 3% Al
2o
3, 2% MnO, 4% MgO, 0.1% P, 0.04% S, 0.08% moisture and inevitable impurity, the granularity of enrichment sludge ball is 15mm.
Lower top blast oxygen starts blowing, and wherein, before blowing, 90s top blow oxygen lance oxygen supply intensity is 1.56m
3/ (mint
steel), oxygen lance position is 1.5m.When oxygen blast 90s is 0.5% to carbon content of molten steel, top blow oxygen lance oxygen supply intensity is 3.4m
3/ (mint
steel), oxygen lance position is 2.4m.From carbon content of molten steel, be 0.5% to blow end point, the oxygen supply intensity of controlling top blow oxygen lance is 1.6m
3/ (mint
steel), oxygen lance position is 1.52m, smelting endpoint no longer carries out deslagging after having gone out steel, slag is stayed in converter, and added 3Kg/t
steelquickened lime slag is wrapped up in dry, prepare next stove and smelt, so repeatedly.
Go out composition of steel and tapping temperature is as shown in table 6 below.
Table 6 endpoint molten steel composition (%), tapping temperature (℃) and change the slag time (s)
| ? | C | Si | Mn | P | S | Tapping temperature | Change the slag time |
| Endpoint molten steel | 0.04 | 0.006 | 0.0543 | 0.007 | 0.0132 | 1628 | 190 |
Changing the slag time is 190s, and dephosphorization rate is 91.3%, and slag state is controlled good, and it is qualified that terminal molten steel component is controlled.
From above-mentioned example, adopt after slagging process of the present invention, carrying out the slag time is 190～210s, and endpoint molten steel phosphorus content is 0.007～0.008%, dephosphorization rate reaches more than 86%, having slag rapidly, come that slag is fast, slag state is active, improve the advantages such as dephosphorizing capacity of slag.
In sum, in the present invention, with remained converter slag steel-making and in semisteel converter steelmaking is produced, quickened lime, high magnesium lime, high alumina slag former and enrichment mud are added to converter as slag making auxiliary material, and appropriately control it and add opportunity and add-on, what while effectively having solved semisteel smelting, existed comes slag speed slow and change the problems such as slag difficulty.
Although above by having described the present invention in conjunction with exemplary embodiment, it will be apparent to those skilled in the art that in the situation that do not depart from the spirit and scope that claim limits, can carry out various modifications and change to exemplary embodiment of the present invention.
Claims (10)
1. a semi-steel making slagging method, is characterized in that, described slagging method comprises the following steps:
In converter a heat finishing blowing and carry out slag splashing remaining slag operation after, in converter, add 5～9Kg/t
steelquickened lime and 9～13Kg/t
steelhigh magnesium lime;
In converter, be blended into half steel, and add 5～9Kg/t after half steel has been converted
steelquickened lime, 9～13Kg/t
steelhigh magnesium lime, 12～15Kg/t
steelhigh alumina slag former and 6～8Kg/t
steelenrichment sludge ball;
Lower top blow oxygen lance blowing.
2. semi-steel making slagging method according to claim 1, it is characterized in that, the composition of described half steel comprises by mass percentage 3.2～4.1% C, 0.015～0.030% Si, 0.02～0.04% Mn, 0.06～0.08% P and is not more than 0.015% S, and temperature when it is blended into converter is 1300～1360 ℃.
3. semi-steel making slagging method according to claim 1, is characterized in that, described enrichment sludge ball comprises 45～60% FeO, 8～15% Fe by mass percentage
2o
3, 5～10% MFe, 5～8% CaO, 10～12% SiO
2, 1～3% Al
2o
3, 1～2% MnO, 3～5% MgO, be less than 0.2% P, be less than 0.05% S, be less than 1% moisture and inevitable impurity.
4. semi-steel making slagging method according to claim 3, is characterized in that, the granularity of described enrichment sludge ball is 10～80mm.
5. semi-steel making slagging method according to claim 1, is characterized in that, described high alumina slag former comprises 45～48% SiO by mass percentage
2, 3～7% MgO, 3～5% CaO, be greater than 12% TFe, 3～8% MnO, 5～8% Al
2o
3, be less than 0.1% P, be less than 0.1% S, be less than 1% moisture and inevitable impurity.
6. semi-steel making slagging method according to claim 1, is characterized in that, described quickened lime contains 85～90% CaO by mass percentage.
7. semi-steel making slagging method according to claim 1, is characterized in that, described high magnesium lime contains 48～55% CaO and 30～40% MgO by mass percentage.
8. semi-steel making slagging method according to claim 1, is characterized in that, described lower top blow oxygen lance blowing comprises: in the 90s after blowing starts, the oxygen supply intensity of controlling top blow oxygen lance is 1.5～2.5m
3/ (mint
steel), oxygen lance position is 1.5～2.5m; While reaching 0.40～0.80% to the carbon content of molten steel in converter after blowing starts 90s, the oxygen supply intensity of controlling top blow oxygen lance is 2.5～3.5m
3/ (mint
steel), oxygen lance position is 1.8～2.5m; Carbon content of molten steel in converter reaches 0.40～0.80% to blow end point, and the oxygen supply intensity of controlling top blow oxygen lance is 1.5～2.0m
3/ (mint
steel), oxygen lance position is 1.4～2m.
9. semi-steel making slagging method according to claim 1, is characterized in that, described slag splashing remaining slag operation is included in to be bessemerized after end, and tapping is also stayed slag in converter, then adds 3～5Kg/t
steelquickened lime slag is wrapped up in dry.
10. a Semi-steel making method, is characterized in that, described Semi-steel making method adopts semi-steel making slagging method as in one of claimed in any of claims 1 to 9 to carry out slag making.
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| CN103993120A (en) * | 2014-06-06 | 2014-08-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for smelting low-sulfur steel with semisteel |
| CN103993121A (en) * | 2014-06-06 | 2014-08-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for enhancing end point carbon of high-carbon steel in molten iron/steel/semisteel smelting process |
| CN103993123A (en) * | 2014-06-06 | 2014-08-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for lowering end point oxygen content in molten iron/steel/semisteel smelting process |
| CN103993119A (en) * | 2014-06-06 | 2014-08-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Semisteel slag forming method |
| CN106755715A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | A kind of agent of vanadium slag slag sluicing system and vanadium slag slag sluicing system method |
| CN106884069A (en) * | 2015-12-16 | 2017-06-23 | 鞍钢股份有限公司 | A kind of converter smelting slagging method |
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| CN103146873A (en) * | 2013-03-29 | 2013-06-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Enriching sludge ball for semisteel steelmaking and slagging method for semisteel steelmaking |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103146873A (en) * | 2013-03-29 | 2013-06-12 | 攀钢集团攀枝花钢铁研究院有限公司 | Enriching sludge ball for semisteel steelmaking and slagging method for semisteel steelmaking |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103993120A (en) * | 2014-06-06 | 2014-08-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for smelting low-sulfur steel with semisteel |
| CN103993121A (en) * | 2014-06-06 | 2014-08-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for enhancing end point carbon of high-carbon steel in molten iron/steel/semisteel smelting process |
| CN103993123A (en) * | 2014-06-06 | 2014-08-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for lowering end point oxygen content in molten iron/steel/semisteel smelting process |
| CN103993119A (en) * | 2014-06-06 | 2014-08-20 | 攀钢集团攀枝花钢铁研究院有限公司 | Semisteel slag forming method |
| CN103993121B (en) * | 2014-06-06 | 2016-02-03 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method of molten iron and steel and semi-steel making raising medium and high carbon steel end point carbon |
| CN103993123B (en) * | 2014-06-06 | 2016-02-03 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method of molten iron and steel and semi-steel making reduction terminal oxygen level |
| CN103993120B (en) * | 2014-06-06 | 2016-03-16 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method of semisteel smelting low-sulfur steel |
| CN103993119B (en) * | 2014-06-06 | 2016-04-13 | 攀钢集团攀枝花钢铁研究院有限公司 | A kind of method of half steel slag making |
| CN106884069A (en) * | 2015-12-16 | 2017-06-23 | 鞍钢股份有限公司 | A kind of converter smelting slagging method |
| CN106755715A (en) * | 2016-12-14 | 2017-05-31 | 四川德胜集团钒钛有限公司 | A kind of agent of vanadium slag slag sluicing system and vanadium slag slag sluicing system method |
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