CN103627838B - A kind of method reducing hot metal containing V-Ti desulphurization and slag skimming iron loss - Google Patents
A kind of method reducing hot metal containing V-Ti desulphurization and slag skimming iron loss Download PDFInfo
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Abstract
The invention discloses a kind of method reducing hot metal containing V-Ti desulphurization and slag skimming iron loss, in hot metal containing V-Ti, add 1.25kg/t
molten iron~ 1.75kg/t
molten irondesulphurization slag modifier and stir, then carry out desulfurization; After desulfurization terminates, the hot metal containing V-Ti after desulfurization is skimmed, when to take off to the residual content of desulfurization slag be 2/5 ~ 3/5 of the former desulfurization quantity of slag, then add 1.25kg/t
molten iron~ 1.75kg/t
molten irondesulphurization slag modifier and stir, then proceed to skim to desulfurization slag and taken off to the greatest extent, wherein, by weight percentage, described desulphurization slag modifier comprises CaO30 ~ 40%, SiO
230 ~ 40%, Al
2o
38 ~ 16%, Na
2cO
34 ~ 9%, CaF
24 ~ 8%, S0.010 ~ 0.080%, P0.010 ~ 0.080%.The present invention, under the prerequisite not affecting molten steel quality, rhythm of production and organization of production, significantly improves the slag state of hot metal containing V-Ti desulfurization slag, reduces desulphurization and slag skimming iron loss and the steel technology of hot metal containing V-Ti sweetening process, reduces STEELMAKING PRODUCTION cost.
Description
Technical field
The invention belongs to hot metal containing V-Ti technical field of smelting, more particularly, relate to a kind of method reducing hot metal containing V-Ti desulphurization and slag skimming iron loss.
Background technology
The feature of hot metal containing V-Ti desulfurization comprises that molten steel sulfur content is high, temperature is low, and due to blast furnace slag that hot metal containing V-Ti is with is containing V-Ti blast-furnace slag, and its fusing point is higher, mobility is poor and be with iron more in slag.And desulfurization slag slag state after hot metal containing V-Ti desulfurization is rarer, slag iron regardless of situation comparatively serious, therefore need after hot metal containing V-Ti desulfurization to control the sulfur content that returns of hot metal containing V-Ti.Therefore, in order to reduce after hot metal containing V-Ti desulfurization return sulfur content, most of molten iron can remove with desulfurization slag by the later stage of skimming together, cause the loss of molten iron and skim operation iron loss higher, greatly waste resource.
Disclose in prior art much for reducing the desulphurization slag modifier of sulphur content, but all do not relate to the method reducing iron loss.Publication number is that the Chinese patent application of CN101372722A discloses a kind of molten iron pretreatment slag collecting agent, wherein mention iron loss after adding this skim agent to decrease, but its for be common molten iron, cannot be applied to and have on the hot metal containing V-Ti of larger difference with common molten iron.
Summary of the invention
For deficiency of the prior art, the object of the invention is to solve the problem that desulphurization and slag skimming iron loss is higher, steel technology is comparatively large, desulfurizing iron cost is higher of hot metal containing V-Ti sweetening process.
To achieve these goals, the invention provides a kind of method reducing hot metal containing V-Ti desulphurization and slag skimming iron loss, in hot metal containing V-Ti, add 1.25kg/t
molten iron~ 1.75kg/t
molten irondesulphurization slag modifier and stir, then carry out desulfurization; After desulfurization terminates, the hot metal containing V-Ti after desulfurization is skimmed, when to take off to the residual content of desulfurization slag be 2/5 ~ 3/5 of the former desulfurization quantity of slag, then add 1.25kg/t
molten iron~ 1.75kg/t
molten irondesulphurization slag modifier and stir, then proceed to skim to desulfurization slag and taken off to the greatest extent, wherein, by weight percentage, described desulphurization slag modifier comprises CaO 30 ~ 40%, SiO
230 ~ 40%, Al
2o
38 ~ 16%, Na
2cO
34 ~ 9%, CaF
24 ~ 8%, S 0.010 ~ 0.080%, P 0.010 ~ 0.080%.
According to an embodiment of the method for reduction hot metal containing V-Ti desulphurization and slag skimming iron loss of the present invention, by weight percentage, the composition of the hot metal containing V-Ti before desulfurization comprises: the iron of C 3.8 ~ 4.8%, Mn 0.10 ~ 0.35%, V 0.25 ~ 0.50%, Si 0.10 ~ 0.40%, S 0.05 ~ 0.16%, P 0.05 ~ 0.16%, Ti 0.10 ~ 0.30% and surplus and inevitable impurity, the temperature of the hot metal containing V-Ti before desulfurization is 1240 ~ 1360 DEG C.
According to an embodiment of the method for reduction hot metal containing V-Ti desulphurization and slag skimming iron loss of the present invention, by weight percentage, desulfurization slag is comprised by the composition taking off the hot metal containing V-Ti to the greatest extent: the iron of C 3.8 ~ 4.8%, Mn0.10 ~ 0.35%, V 0.24 ~ 0.49%, Si 0.10 ~ 0.40%, S 0.001 ~ 0.005%, P 0.05 ~ 0.16%, Ti 0.10 ~ 0.30% and surplus and inevitably impurity, and desulfurization slag is 1220 ~ 1340 DEG C by the temperature of taking off the hot metal containing V-Ti to the greatest extent.
According to an embodiment of the method for reduction hot metal containing V-Ti desulphurization and slag skimming iron loss of the present invention, the Task-size Controlling of described desulphurization slag modifier is≤3mm.
According to an embodiment of the method for reduction hot metal containing V-Ti desulphurization and slag skimming iron loss of the present invention, adding the churning time after desulphurization slag modifier is 15 ~ 30 seconds.
According to an embodiment of the method for reduction hot metal containing V-Ti desulphurization and slag skimming iron loss of the present invention, the primary sample analysis carried out before described method is also included in desulfurization and calculated the step of iron loss by the secondary sample analysis carried out after taking off to the greatest extent in desulfurization slag.
The present invention, under the prerequisite not affecting molten steel quality, rhythm of production and organization of production, significantly improves the slag state of hot metal containing V-Ti desulfurization slag, reduces desulphurization and slag skimming iron loss and the steel technology of hot metal containing V-Ti sweetening process, reduces STEELMAKING PRODUCTION cost.
Embodiment
Hereinafter, the method for reduction hot metal containing V-Ti desulphurization and slag skimming iron loss of the present invention will be described in detail in conjunction with exemplary embodiment.
According to exemplary embodiment of the present invention, the method for reduction hot metal containing V-Ti desulphurization and slag skimming iron loss of the present invention comprises the following steps: in hot metal containing V-Ti, add 1.25kg/t
molten iron~ 1.75kg/t
molten irondesulphurization slag modifier and stir, then carry out desulfurization; After desulfurization terminates, the hot metal containing V-Ti after desulfurization is skimmed, when to take off to the residual content of desulfurization slag be 2/5 ~ 3/5 of the former desulfurization quantity of slag, then add 1.25kg/t
molten iron~ 1.75kg/t
molten irondesulphurization slag modifier and stir, then proceed to skim to desulfurization slag and taken off to the greatest extent, wherein, by weight percentage, described desulphurization slag modifier comprises CaO 30 ~ 40%, SiO
230 ~ 40%, Al
2o
38 ~ 16%, Na
2cO
34 ~ 9%, CaF
24 ~ 8%, S 0.010 ~ 0.080%, P 0.010 ~ 0.080%.Further, the primary sample analysis carried out before desulfurization can also being included according to method of the present invention and calculated the step of iron loss by the secondary sample analysis carried out after taking off to the greatest extent in desulfurization slag.
Wherein, hot metal containing V-Ti obtains by after vanadium titano-magnetite blast-furnace smelting.After hot metal containing V-Ti enters desulfurization station, and before this hot metal containing V-Ti is carried out desulfurization, first in hot metal containing V-Ti, add 1.25kg/t
molten iron~ 1.75kg/t
molten irondesulphurization slag modifier and stir, slag removal machine such as can be adopted directly to stir, and then carry out conventional desulfurization process.This is because hot metal containing V-Ti is obtained by blast-furnace smelting usually, in the process of blast furnace casting, part blast furnace slag enters in iron ladle with hot metal containing V-Ti, therefore hot metal containing V-Ti generally all can have the blast furnace slag that quantity is larger, with in blast furnace slag containing more iron, therefore need to add desulphurization slag modifier with the slag system making hot metal containing V-Ti surface slag system change low melting point into early stage in desulfurization, and a large amount of iron wherein carried are separated make it be added in molten iron, thus the preliminary band iron reduced in slag, improve the basicity of hot metal containing V-Ti surface slag system further simultaneously, reach the object improving sweetening process desulfuration efficiency.In this step, if the add-on of desulphurization slag modifier is less than 1.25kg/t
molten iron, residue adjustment effect is poor, and hot metal containing V-Ti surface slag system is difficult to change low melting point slag system into; If the add-on of desulphurization slag modifier is greater than 1.75kg/t
molten iron, then comparatively large on the temperature drop impact of hot metal containing V-Ti, cause steel desulfurization cost significantly to rise, therefore, the add-on of desulphurization slag modifier is set to 1.25kg/t
molten iron~ 1.75kg/t
molten ironthe most suitable.
Preferably, adding the churning time after desulphurization slag modifier is 15 ~ 30 seconds, to mix hot metal containing V-Ti and desulphurization slag modifier fully.If churning time is less than 15 seconds, the mixed effect of desulphurization slag modifier and desulfurization slag is not good, reacts insufficient, and residue adjustment effect can not give full play to; If churning time is greater than 30 seconds, then comparatively large on production logistics impact, extend logistics time and can hot metal temperature drop be strengthened, being unfavorable for STEELMAKING PRODUCTION.According to one embodiment of present invention, by weight percentage, the composition of the hot metal containing V-Ti before desulfurization comprises: the iron of C 3.8 ~ 4.8%, Mn 0.10 ~ 0.35%, V 0.25 ~ 0.50%, Si 0.10 ~ 0.40%, S 0.05 ~ 0.16%, P 0.05 ~ 0.16%, Ti 0.10 ~ 0.30% and surplus and inevitable impurity, the temperature of the hot metal containing V-Ti before desulfurization is 1240 ~ 1360 DEG C.
According to one embodiment of present invention, by weight percentage, desulphurization slag modifier of the present invention comprises CaO 30 ~ 40%, SiO
230 ~ 40%, Al
2o
38 ~ 16%, Na
2cO
34 ~ 9%, CaF
24 ~ 8%, S 0.010 ~ 0.080%, P 0.010 ~ 0.080%.
Specifically, the Main Function of CaO is to carry out calcification processing to the blast furnace slag on hot metal containing V-Ti surface, the basicity of hot metal containing V-Ti surface slag system before raising desulfurization, make slag system change the lower slag system of fusing point into simultaneously, be conducive to giving full play to and improving the captured sulfur result of slag system of slag sluicing system and later stage desulfuration efficiency, if when the content of CaO is less than 30%, improve slag system basicity and reduce the DeGrain of slag system fusing point, if when the content of CaO is greater than 40%, the basicity of hot metal containing V-Ti surface slag system is too high, makes desulfuration efficiency decrease on the contrary.
SiO
2mainly in order to make hot metal containing V-Ti surface slag system change the higher silicate slag system of fusing point into, silicate sludge ties up to and presents solid-state when molten iron temperature is about 1300 DEG C, can reach the effect of good slag sluicing system, is conducive to minimizing and skims band iron, if SiO
2content be less than 30%, then the effect generating high-melting-point slag system is poor, if SiO
2content be greater than 40%, then the slag state of desulfurization slag is thicker, and slag sluicing system effect is poor.
Al
2o
3be mainly used in and SiO
2mating reaction makes slag system change dystectic aluminosilicate slag system into, is conducive to slag sluicing system and desulphurization and slag skimming, Al
2o
3the excessive or too small slag system that all can make of add-on change the poor effect of aluminosilicate slag system into.
Na
2cO
3effect be to reduce the viscosity of desulfurization slag, reduce the iron loss of desulphurization and slag skimming further and control back sulfur content, if Na
2cO
3add-on too low, then the viscosity reduction effect of slag system is not obvious, if Na
2cO
3add-on excessive, slag state will be caused rarer, be unfavorable for slag sluicing system and reduce skimming iron loss and returning the control of sulfur content.
CaF
2main Function be to regulate the viscosity of desulfurization slag, be conducive to improving desulfuration efficiency and be conducive to desulphurization and slag skimming operation, working as CaF
2add-on add when being less than 4%, the thicker and poor fluidity of desulfurization slag, slag sluicing system weak effect, works as CaF
2add-on when being greater than 8%, desulfurization slag is rarer and comparatively serious to the etch of iron ladle refractory materials, is also unfavorable for desulphurization and slag skimming.
For S, P element, if S, P content is too low, slag supplying agent raw materials cost then can be made significantly to increase, if S, P too high levels, desulphurization cost and follow-up steel-making dephosphorization cost then can be made to increase considerably, therefore from the angle of cost control, need S, P content to control in the OK range of 0.010 ~ 0.080%.
Preferably, be≤3mm by the Task-size Controlling of above-mentioned desulphurization slag modifier, improve reaction efficiency with augmenting response interface.
After end to be desulfurization, the hot metal containing V-Ti after desulfurization is skimmed, when to take off to the residual content of desulfurization slag be 2/5 ~ 3/5 of the former desulfurization quantity of slag, then add 1.25kg/t
molten iron~ 1.75kg/t
molten irondesulphurization slag modifier and stir, then proceed to skim to desulfurization slag and taken off to the greatest extent.Preferably, now adding the churning time after desulphurization slag modifier is also 15 ~ 30 seconds.
After desulfurization terminates, the desulfurization slag slag state of hot metal containing V-Ti most surface is better, and the iron level of slag sluicing system better and in slag is lower, does not therefore need to use slag supplying agent can carry out skimming and can reach effect of skimming preferably.After removing a part of desulfurization slag, remaining desulfurization slag slag state is poor, difficulty of skimming and slag sluicing system effect is poor, band iron of skimming is more, now adding desulphurization slag modifier is again to make the slag system be left change dystectic slag system into, reach that slag state is good, slag sluicing system is effective, be easy to take off the object of slag operation, and the captured sulfur result of slag system in the process of skimming can be improved, be unlikely to make sulphur melt back in slag in hot metal containing V-Ti.In addition, carry out after substep skims, early stage after desulfurization terminates good for slag state desulfurization slag can be removed, and re-use in the later stage add-on that desulphurization slag modifier just significantly can reduce slag supplying agent when desulfurization slag slag state is poor, save production cost, reduce the wasting of resources.Desulphurization slag modifier is added again and to carry out the effect that secondary skims better when the residual content of skimming for the first time to desulfurization slag is 2/5 ~ 3/5 of the former desulfurization quantity of slag.
According to one embodiment of present invention, by weight percentage, desulfurization slag is comprised by the composition taking off the hot metal containing V-Ti to the greatest extent: the iron of C 3.8 ~ 4.8%, Mn 0.10 ~ 0.35%, V 0.24 ~ 0.49%, Si 0.10 ~ 0.40%, S 0.001 ~ 0.005%, P 0.05 ~ 0.16%, Ti 0.10 ~ 0.30% and surplus and inevitably impurity, and desulfurization slag is 1220 ~ 1340 DEG C by the temperature of taking off the hot metal containing V-Ti to the greatest extent.
In order to understand the present invention better, further illustrate the present invention below in conjunction with concrete example.Unless otherwise noted, the per-cent in example is all weight percentage.
Example 1
Hot metal containing V-Ti is obtained after vanadium titano-magnetite blast-furnace smelting terminates.After hot metal containing V-Ti enters desulfurization station, weight is 200t, and temperature is 1260 DEG C, and composition is: the iron of C 3.9%, Mn 0.15%, V 0.30%, Si 0.18%, S 0.070%, P 0.073%, Ti 0.15% and surplus and inevitable impurity.1.25kg/t is added in desulfurization forward direction hot metal containing V-Ti
molten irondesulphurization slag modifier, the composition of desulphurization slag modifier is: CaO30%, SiO
240%, Al
2o
316%, Na
2cO
39%, CaF
24.9%, S 0.05%, P 0.05%, uses slag removal machine to stir 20 seconds, then carries out desulfurization.After desulfurization terminates, desulfurization slag weight is 10.5t, first skims, and when slag to be desulfurization removes to residue 5 ~ 5.5t, adds 1.25kg/t
molten ironabove-mentioned desulphurization slag modifier, use slag removal machine to stir 20 seconds, proceed to skim to desulfurization slag and taken off to the greatest extent.After skimming, desulfurization slag is taken off that the hot metal containing V-Ti is to the greatest extent weighed, thermometric and sampling analysis, desulfurization slag by the weight of taking off the hot metal containing V-Ti be to the greatest extent 195.2t, temperature is 1250 DEG C, composition is C 3.9%, Mn 0.15%, V 0.0.29%, Si 0.18%, S 0.002%, P 0.073%, the iron of Ti 0.14% and surplus and inevitable impurity.Be 2.4% by calculating the desulphurization and slag skimming iron loss of sweetening process.
Example 2
Hot metal containing V-Ti is obtained after vanadium titano-magnetite blast-furnace smelting terminates.After hot metal containing V-Ti enters desulfurization station, weight is 250t, and temperature is 1350 DEG C, and composition is: the iron of C 4.4%, Mn 0.30%, V 0.45%, Si 0.38%, S 0.140%, P 0.120%, Ti 0.30% and surplus and inevitable impurity.1.75kg/t is added in desulfurization forward direction hot metal containing V-Ti
molten irondesulphurization slag modifier, the composition of desulphurization slag modifier is: CaO40%, SiO
230%, Al
2o
313%, Na
2cO
39%, CaF
27.9%, S 0.05%, P 0.05%, uses slag removal machine to stir 30 seconds, then carries out desulfurization.After desulfurization terminates, desulfurization slag weight is 13t, first skims, and when slag to be desulfurization removes to residue 6.5 ~ 7t, adds 1.75kg/t
molten irondesulphurization slag modifier, use slag removal machine to stir 30 seconds, proceed to skim to desulfurization slag and taken off to the greatest extent.After skimming, desulfurization slag is taken off that the hot metal containing V-Ti is to the greatest extent weighed, thermometric and sampling analysis, desulfurization slag by the weight of taking off the hot metal containing V-Ti be to the greatest extent 243.75t, temperature is 1335 DEG C, composition is iron and the inevitable impurity of C 4.4%, Mn 0.30%, V 0.44%, Si 0.37%, S 0.005%, P 0.120%, Ti 0.30% and surplus.Be 2.5% by calculating sweetening process desulphurization and slag skimming iron loss.
Example 3
Hot metal containing V-Ti is obtained after vanadium titano-magnetite blast-furnace smelting terminates.After hot metal containing V-Ti enters desulfurization station, weight is 220t, and temperature is 1280 DEG C, and composition is: the iron of C 4.2%, Mn 0.27%, V 0.35%, Si 0.30%, S 0.086%, P 0.058%, Ti 0.27% and surplus and inevitable impurity.1.5kg/t is added in desulfurization forward direction hot metal containing V-Ti
molten irondesulphurization slag modifier, the composition of desulphurization slag modifier is: CaO 37%, SiO
238%, Al
2o
312%, Na
2cO
37%, CaF
25.9%, S 0.05%, P 0.05%, uses slag removal machine to stir 20 seconds, then carries out desulfurization.After desulfurization terminates, desulfurization slag weight is 11t, first skims, and when slag to be desulfurization removes to residue 5.5 ~ 6t, adds 1.5kg/t
molten irondesulphurization slag modifier, use slag removal machine to stir 20 seconds, proceed to skim to desulfurization slag and taken off to the greatest extent.After skimming, desulfurization slag is taken off that the hot metal containing V-Ti is to the greatest extent weighed, thermometric and sampling analysis, desulfurization slag by the weight of taking off the hot metal containing V-Ti be to the greatest extent 215.6t, temperature is 1268 DEG C, composition is iron and the inevitable impurity of C 4.2%, Mn 0.27%, V 0.34%, Si 0.29%, S 0.002%, P 0.058%, Ti 0.27% and surplus.Be 2.0% by calculating sweetening process desulphurization and slag skimming iron loss.
Comparative example 1
Hot metal containing V-Ti is obtained after vanadium titano-magnetite blast-furnace smelting terminates, after hot metal containing V-Ti enters desulfurization station, weight is 225t, temperature is 1330 DEG C, and composition is: the iron of C 4.5%, Mn 0.25%, V 0.37%, Si 0.33%, S 0.094%, P 0.072%, Ti 0.22% and surplus and inevitable impurity.After hot metal containing V-Ti enters the station, directly carry out desulfurizing iron, do not add desulphurization slag modifier.After hot metal containing V-Ti desulfurization terminates, directly carrying out skimming, it is most to be taken off to desulfurization slag.After skimming, desulfurization slag is taken off that the hot metal containing V-Ti is to the greatest extent weighed, thermometric and sampling analysis, desulfurization slag by the weight of taking off the hot metal containing V-Ti be to the greatest extent 212.3t, temperature is 1268 DEG C, composition is: the iron of C 4.5%, Mn 0.25%, V 0.36%, Si 0.32%, S 0.005%, P 0.072%, Ti 0.22% and surplus and inevitably impurity.By calculating, sweetening process desulphurization and slag skimming iron loss is 3.5%.
In sum, the method of reduction hot metal containing V-Ti desulphurization and slag skimming iron loss of the present invention has the advantages such as simple to operate, result of use is good relative to prior art, sweetening process desulphurization and slag skimming iron loss is 2.0 ~ 2.5%, more than 1% is reduced than the desulphurization and slag skimming iron loss not by the inventive method, significantly improve the desulfurization slag slag state of hot metal containing V-Ti, reduce desulphurization and slag skimming iron loss and the steel technology of hot metal containing V-Ti sweetening process, reduce STEELMAKING PRODUCTION cost.
Although illustrate and describe the method for reduction hot metal containing V-Ti desulphurization and slag skimming iron loss of the present invention above in conjunction with the embodiments, but what those skilled in the art will appreciate that is, when not departing from the spirit and scope of the present invention as claims restriction, the various changes in form and details can be made here.
Claims (5)
1. reduce a method for hot metal containing V-Ti desulphurization and slag skimming iron loss, it is characterized in that, in hot metal containing V-Ti, add 1.25kg/t
molten iron~ 1.75kg/t
molten irondesulphurization slag modifier and stir, then carry out desulfurization; After desulfurization terminates, the hot metal containing V-Ti after desulfurization is skimmed, when to take off to the residual content of desulfurization slag be 2/5 ~ 3/5 of the former desulfurization quantity of slag, then add 1.25kg/t
molten iron~ 1.75kg/t
molten irondesulphurization slag modifier and stir, then proceed to skim to desulfurization slag and taken off to the greatest extent,
Wherein, by weight percentage, described desulphurization slag modifier comprises CaO 30 ~ 40%, SiO
230 ~ 40%, Al
2o
38 ~ 13%, Na
2cO
34 ~ 9%, CaF
24 ~ 8%, S 0.010 ~ 0.080%, P0.010 ~ 0.080%;
By weight percentage, the composition of the hot metal containing V-Ti before desulfurization comprises: the iron of C 3.8 ~ 4.8%, Mn0.10 ~ 0.35%, V 0.25 ~ 0.50%, Si 0.10 ~ 0.40%, S 0.05 ~ 0.16%, P 0.05 ~ 0.16%, Ti 0.10 ~ 0.30% and surplus and inevitable impurity, the temperature of the hot metal containing V-Ti before desulfurization is 1240 ~ 1360 DEG C.
2. the method for reduction hot metal containing V-Ti desulphurization and slag skimming iron loss according to claim 1, it is characterized in that, by weight percentage, desulfurization slag is comprised by the composition taking off the hot metal containing V-Ti to the greatest extent: the iron of C 3.8 ~ 4.8%, Mn 0.10 ~ 0.35%, V 0.24 ~ 0.49%, Si 0.10 ~ 0.40%, S 0.001 ~ 0.005%, P 0.05 ~ 0.16%, Ti 0.10 ~ 0.30% and surplus and inevitably impurity, and desulfurization slag is 1220 ~ 1340 DEG C by the temperature of taking off the hot metal containing V-Ti to the greatest extent.
3. the method for reduction hot metal containing V-Ti desulphurization and slag skimming iron loss according to claim 1, is characterized in that, the Task-size Controlling of described desulphurization slag modifier is≤3mm.
4. the method for reduction hot metal containing V-Ti desulphurization and slag skimming iron loss according to claim 1, is characterized in that, adding the churning time after desulphurization slag modifier is 15 ~ 30 seconds.
5. the method for reduction hot metal containing V-Ti desulphurization and slag skimming iron loss according to claim 1, it is characterized in that, the primary sample analysis carried out before described method is also included in desulfurization and calculated the step of iron loss by the secondary sample analysis carried out after taking off to the greatest extent in desulfurization slag.
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| CN106319128A (en) * | 2015-06-26 | 2017-01-11 | 鞍钢股份有限公司 | Method for reducing blowing desulfurization slagging-off and slagging-off loss of high-vanadium-titanium molten iron |
| CN105331772B (en) * | 2015-11-27 | 2017-11-03 | 攀钢集团攀枝花钢钒有限公司 | A kind of half steel desulphurization and slag skimming slag adjusting agent and its preparation and application |
| CN107287385B (en) * | 2016-03-31 | 2019-04-16 | 上海梅山钢铁股份有限公司 | Molten iron drossing stays the calculating and control method of slag ratio example |
| CN112553409B (en) * | 2020-12-11 | 2023-04-14 | 四川德胜集团钒钛有限公司 | Vanadium-titanium-containing molten iron slag conglomeration agent and preparation method thereof |
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| CN1199099A (en) * | 1998-02-24 | 1998-11-18 | 宝山钢铁(集团)公司 | Desulfurizing slag modifier |
| CN102851441A (en) * | 2011-06-28 | 2013-01-02 | 鞍钢股份有限公司 | Slag-iron separating agent for high-vanadium-titanium molten iron and slag-iron separating method thereof |
| CN103014217A (en) * | 2011-09-26 | 2013-04-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Desulfurizing agent and application thereof as well as molten iron krypton (KR) desulfurization method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1199099A (en) * | 1998-02-24 | 1998-11-18 | 宝山钢铁(集团)公司 | Desulfurizing slag modifier |
| CN102851441A (en) * | 2011-06-28 | 2013-01-02 | 鞍钢股份有限公司 | Slag-iron separating agent for high-vanadium-titanium molten iron and slag-iron separating method thereof |
| CN103014217A (en) * | 2011-09-26 | 2013-04-03 | 攀钢集团攀枝花钢铁研究院有限公司 | Desulfurizing agent and application thereof as well as molten iron krypton (KR) desulfurization method |
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