CN104060021B - A kind of low silicon low temperature vanadium-bearing hot metal vanadium extraction by converter blowing technique - Google Patents
A kind of low silicon low temperature vanadium-bearing hot metal vanadium extraction by converter blowing technique Download PDFInfo
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Abstract
The invention discloses a kind of low silicon low temperature vanadium-bearing hot metal vanadium extraction by converter blowing technique, this technique comprises and being blown in converter by low silicon low temperature vanadium-bearing hot metal, and adds refrigerant in the process of blowing, and wherein, the temperature controlling blow end point is 1340-1370 DEG C; The consumption of described refrigerant is 5-24kg/t low silicon low temperature vanadium-bearing hot metal; Blowing process be divided into three phases: from beginning oxygen blast to oxygen blast to the first stage of the 9-12% of oxygen blast total amount, control converting process in rifle position be 1.6-1.8m; From after the first stage to oxygen blast to the subordinate phase of the 85-90% of oxygen blast total amount, the rifle position controlled in converting process is 1.9-2.1m; To the end oxygen blown stage after subordinate phase, the rifle position controlled in converting process is 1.6-1.8m.Vanadium slag of high grade that the present invention obtains, the C content of the half steel of acquisition is higher, achieves the object of " going vanadium to protect carbon " preferably.
Description
Technical field
The invention belongs to vanadium extraction by converter blowing technical field, relate to a kind of low silicon low temperature vanadium-bearing hot metal vanadium extraction by converter blowing method.
Background technology
Vanadium belongs to noble metal, applied range, and economic worth is high, is a kind of very important industrial raw material, can be widely used in iron and steel, chemical industry, aerospace, electronic industry, biology and agriculture field.Vanadium is very wide in the distribution of occurring in nature, accounts for 0.02% of earth crustal mass; But its distribution very disperses, normal and other metallic ore symbiosis, so when exploiting with these ores of processing, vanadium is reclaimed as symbiotic products or byproduct.Vanadium titano-magnetite is the essential mineral resource of vanadium, vanadium, iron, titanium symbiosis, after generally being smelted into molten iron, reoxidizes blowing and obtains vanadium slag as the main raw material producing vanadium product.The process of producing vanadium slag is called vanadium extraction, and the factory of current China production vanadium slag mainly contains climbs steel and holds steel.The technique of producing vanadium slag is all adopt oxygen coverter process for extracting vanadium, and oxygen coverter process for extracting vanadium is mainly by oxygen supply, and the oxide compound forming vanadium enters in slag.
The key distinction of vanadium extraction by converter blowing and converter steelmaking process is that the main task of vanadium extraction by converter blowing is " vanadium extraction guarantor carbon ", temperature must be controlled in certain scope in whole vanadium extracting process.Vanadium is the element be very easily oxidized, and is more or less the same with Si, Mn, V peroxide breaks down pressure.After oxygen supply, Mn, Si, Cr, Fe in molten iron and a small amount of C are simultaneously oxidized to be entered in vanadium slag, and except V element, in all the other elements, the oxidation heat liberation of Si element is maximum to converter heat effects in each element oxide process.Generally control bath temperature by refrigerant add-on, suppress reaction between carbon and oxygen, allow the vanadium in molten iron fast and complete oxidation enters in slag, and the carbon few oxidation as far as possible in molten iron, during to ensure steel-making, oxidation of coal provides enough heats to heat up.
CN102251070A describes one and utilizes CO
2solution converter extracting vanadium smelting process temperature control is difficult, stirring capacity is weak causes the technical problems such as the conversion rate of oxidation of vanadium is low, and realize the method for converter efficient vanadium extracting, this invention adopts time-division transfer CO in vanadium extracting process in converter
2infeed amount, CO
2participate in temperature control function and the strong mixing effect of melt tank reaction, control vanadium extraction reaction process bath temperature at 1350-1400 DEG C, strengthen melting bath stirring, improve CO dividing potential drop in stove, suppress decarburizing reaction, promote that carbon is protected in vanadium extraction, improve conversion rate of oxidation and the v slag grade of vanadium.Introduce this invention and belong to green process for extracting vanadium, be applicable to 30-300 ton converter extracting vanadium, ton steel CO
2consumption is 5-50kg/t.Adopt this invention can improve vanadium extraction by converter blowing rate 3-15%, v slag grade improves more than 1%, realizes the object of converter efficient vanadium extracting.But this method is still in the laboratory study stage, has not found industrial application.
CN102127614A describes and adopts analysis of fumes method, and by CO and O
2concentration curve signal is connected on computer, forms continuity curve; That determines vanadium extraction converting process refrigerant according to the change of CO content in furnace gas adds opportunity, and the optimum temps that converting process extends vanadium oxidation is interval, combines judge vanadium extraction terminal with oxygen consumption in vanadium extraction model.Under equal molten iron condition, introducing this invention half steel carbon Absorbable organic halogens controls at 3.70-3.90%, mean value is 3.86%, improve 0.14 percentage point, for lower road steel making working procedure provides stable half steel condition, effectively stop the terminal after-blow phenomenon because semi-steel making shortage of heat causes, and the steel quality problem caused because of serious after-blow; Remaining vanadium controls between 0.030-0.050%, and average remaining vanadium reaches 0.039%, and remaining vanadium reduces by 0.004 percentage point, vanadium oxidation ratio reaches 81-92%, and mean value is 85%, and comparatively background technology improves 2 percentage points, the rate of recovery also corresponding increase of vanadium, improves the key technical indexes of vanadium extraction further.But the flue gas analysis method that this method adopts is forecast converter steelmaking process indirectly, and the application of present stage steel-smelting technology yet there are no successful Application, practical application effect need further textual criticism and perfect.
Article " research of 150t vanadium extraction by converter blowing feed pattern " is the recovery rate improving vanadium in converter steelmaking process, has carried out exploratory study to the feed postition of powdered iron ore and blowing model.But this research is the research carried out in laboratory conditions, has certain directive significance to industrial production, but practical application effect need further textual criticism and perfect.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide a kind of and can ensure the grade of vanadium slag that obtains and the high vanadium extraction by converter blowing technique of half steel C content for low silicon low temperature vanadium-bearing hot metal.
To achieve these goals, the present inventor has carried out a large amount of experiments, found that, controls the vanadium extraction by converter blowing that the temperature of blow end point, the consumption of refrigerant and rifle position can realize low silicon low temperature vanadium-bearing hot metal within the specific limits well.Therefore, to achieve these goals, the invention provides a kind of low silicon low temperature vanadium-bearing hot metal vanadium extraction by converter blowing technique, this technique comprises: blown in converter by low silicon low temperature vanadium-bearing hot metal, and refrigerant is added in the process of blowing, it is characterized in that, the temperature controlling blow end point is 1340-1370 DEG C; The consumption of described refrigerant is 5-24kg/t low silicon low temperature vanadium-bearing hot metal; Blowing process be divided into three phases, the rifle position in each stage and blowing oxygen quantity as follows:
First stage: from oxygen blast to oxygen blast to the stage of the 9-12% of oxygen blast total amount, the rifle position controlled in converting process is 1.6-1.8m;
Subordinate phase: from after the first stage to oxygen blast to the stage of the 85-90% of oxygen blast total amount, the rifle position controlled in converting process is 1.9-2.1m;
Phase III: to the end oxygen blown stage after subordinate phase, the rifle position controlled in converting process is 1.6-1.8m.
Pass through technique scheme, (i.e. content of vanadium high and TFe content is low) of high grade of the vanadium slag that the present invention obtains, and, the C content of the half steel obtained after the inventive method vanadium extraction by converter blowing is higher (in 3.7-4.1 % by weight scope), achieve the object of " going vanadium to protect carbon " preferably, and the temperature of half steel can meet follow-up steel-making demand.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Embodiment
Below the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In the present invention, when not doing contrary explanation, " TFe " and " TFe content " all represents the total iron content pressing ferro element weighing scale; Converting process is the process being blown into oxygen by oxygen rifle in converter, and the height in the face, nozzle distance molten bath (minimum level of molten iron) of oxygen rifle is called as rifle position.
Low silicon low temperature vanadium-bearing hot metal vanadium extraction by converter blowing technique provided by the invention comprises: blown in converter by low silicon low temperature vanadium-bearing hot metal, and refrigerant is added in the process of blowing, it is characterized in that, the temperature controlling blow end point is 1340-1370 DEG C, is preferably 1360-1370 DEG C; The consumption of described refrigerant is 5-24kg/t low silicon low temperature vanadium-bearing hot metal, is preferably 7-22kg/t low silicon low temperature vanadium-bearing hot metal; Blowing process be divided into three phases, the rifle position in each stage and blowing oxygen quantity as follows:
First stage: from oxygen blast to oxygen blast to the stage of the 9-12% of oxygen blast total amount, the rifle position controlled in converting process is 1.6-1.8m;
Subordinate phase: from after the first stage to oxygen blast to the stage of the 85-90% of oxygen blast total amount, the rifle position controlled in converting process is 1.9-2.1m;
Phase III: to the end oxygen blown stage after subordinate phase, the rifle position controlled in converting process is 1.6-1.8m.
In vanadium extraction by converter blowing process, in converting process, add refrigerant carry out control temperature better, be oxidized to make the vanadium in vanadium-bearing hot metal and enter into vanadium slag.In the present invention, to the kind of described refrigerant and add special requirement on opportunity, the conventional refrigerant in this area can be adopted also to adopt usual manner to add, as long as the consumption of described refrigerant is in above-mentioned scope, such as, iron scale can be used as refrigerant.Described refrigerant can add in blowing 1-3min.Under preferable case, described refrigerant contains the Fe of 30-45 % by weight
2o
3, 30-45 % by weight the SiO of FeO, 5-10 % by weight
2, 2-5 % by weight Al
2o
3with the TiO of 2-5 % by weight
2.
A preferred embodiment of the invention, the rifle position in each stage and blowing oxygen quantity as follows:
First stage: from oxygen blast to oxygen blast to the stage of 10% of oxygen blast total amount, the rifle position controlled in converting process is 1.6-1.8m;
Subordinate phase: from after the first stage to oxygen blast to the stage of 88% of oxygen blast total amount, the rifle position controlled in converting process is 1.9-2.1m;
Phase III: to the end oxygen blown stage after subordinate phase, the rifle position controlled in converting process is 1.6-1.8m.
The present inventor finds, can realize object of the present invention better according to the rifle position and blowing oxygen quantity controlling each stage in converting process with upper type.
According to the present invention, the oxygen blast total amount in converting process and duration of blast, without particular requirement, can adopt the condition of this area routine, and in order to control the temperature of blow end point better in above-mentioned scope, preferably, the oxygen blast total amount controlled in converting process is 10-15m
3/ t low silicon low temperature vanadium-bearing hot metal (is more preferably 10.5-13m
3/ t low silicon low temperature vanadium-bearing hot metal).The time of blowing can be more preferably 4-5min for 4-6min().In converting process, the flow of oxygen can adopt and well known to a person skilled in the art parameter, is preferably 15000-17000m
3/ h.The flow controlling oxygen in described preferred mode can more accurately control half composition of steel and temperature.
In the present invention, control rifle position meets above-mentioned optimum condition and can realize low silicon low temperature vanadium-bearing hot metal vanadium extraction by converter blowing better, that is, can realize the object that carbon is protected in vanadium extraction better.In addition, the concrete control method of rifle position is well known to those skilled in the art, and does not repeat them here.
According to the present invention, vanadium extraction by converter blowing technique of the present invention is specially adapted to the vanadium extraction by converter blowing of low silicon low temperature vanadium-bearing hot metal, therefore, preferably, described low silicon low temperature vanadium-bearing hot metal contains the V of Ti and 0.25-0.35 % by weight of Mn, 0.2-0.35 % by weight of Si, 0.2-0.5 % by weight of C, 0.03-0.1 % by weight of 4.1-4.6 % by weight.Wherein, the main component of described low silicon low temperature vanadium-bearing hot metal is Fe, and content is generally 93-96 % by weight.
According to the present invention, before blowing, the temperature of described low silicon low temperature vanadium-bearing hot metal preferably≤1250 DEG C (as 1200-1250 DEG C).
Below will be described the present invention by embodiment." blowing oxygen quantity " refers to: at certain time point, and the amount of the oxygen be blown in converter accounts for the per-cent of the oxygen blast total amount in whole converting process.
Embodiment 1
140t low silicon low temperature vanadium-bearing hot metal is loaded in converter extracting vanadium, enter stove low silicon low temperature vanadium-bearing hot metal contain 4.55 % by weight C, 0.05 % by weight Si, 0.29 % by weight Mn, Ti, the V of 0.25 % by weight of 0.26 % by weight, the S of the P of 0.064 % by weight and 0.005 % by weight, all the other are Fe.The temperature entering stove low silicon low temperature vanadium-bearing hot metal is 1225 DEG C.By oxygen rifle, (during blowing oxygen quantity <10%, controlling rifle position is 1.7m; During blowing oxygen quantity=10-88%, controlling rifle position is 2m; During blowing oxygen quantity >88%, controlling rifle position is 1.7m) in converter, be blown into oxygen blow, oxygen blast total amount is 11.8m
3/ t low silicon low temperature vanadium-bearing hot metal, the temperature controlling blow end point is 1365 DEG C (time of blowing is 5min).Refrigerant is added (containing the Fe of 30 % by weight when blowing 1min
2o
3, the FeO of 45 % by weight, the SiO of 5 % by weight
2, 2 % by weight Al
2o
3with 5 % by weight TiO
2), add-on is 14.3kg/t low silicon low temperature vanadium-bearing hot metal.V in C content in the half steel obtained after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Embodiment 2
140t low silicon low temperature vanadium-bearing hot metal is loaded in converter extracting vanadium, enter stove low silicon low temperature vanadium-bearing hot metal contain 4.45 % by weight C, 0.1 % by weight Si, 0.26 % by weight Mn, Ti, the V of 0.28 % by weight of 0.27 % by weight, the S of the P of 0.068 % by weight and 0.006 % by weight, all the other are Fe.The temperature entering stove low silicon low temperature vanadium-bearing hot metal is 1250 DEG C.By oxygen rifle, (during blowing oxygen quantity <10%, controlling rifle position is 1.8m; During blowing oxygen quantity=10-88%, controlling rifle position is 2.1m; During blowing oxygen quantity >88%, controlling rifle position is 1.6m) in converter, be blown into oxygen blow, oxygen blast total amount is 12.8m
3/ t low silicon low temperature vanadium-bearing hot metal, the temperature controlling blow end point is 1360 DEG C (time of blowing is 4.5min).Refrigerant is added (containing the Fe of 40 % by weight when blowing 1min
2o
3, the FeO of 35 % by weight, the SiO of 10 % by weight
2, 5 % by weight Al
2o
3with 4 % by weight TiO
2), add-on is 21.4kg/t low silicon low temperature vanadium-bearing hot metal.V in C content in the half steel obtained after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Embodiment 3
140t low silicon low temperature vanadium-bearing hot metal is loaded in converter extracting vanadium, enter stove low silicon low temperature vanadium-bearing hot metal contain 4.45 % by weight C, 0.035 % by weight Si, 0.30 % by weight Mn, Ti, the V of 0.29 % by weight of 0.28 % by weight, the S of the P of 0.069 % by weight and 0.005 % by weight, all the other are Fe.The temperature entering stove low silicon low temperature vanadium-bearing hot metal is 1205 DEG C.By oxygen rifle, (during blowing oxygen quantity <10%, controlling rifle position is 1.7m; During blowing oxygen quantity=10-88%, controlling rifle position is 1.9m; During blowing oxygen quantity >88%, controlling rifle position is 1.7m) in converter, be blown into oxygen blow, oxygen blast total amount is 10.9m
3/ t low silicon low temperature vanadium-bearing hot metal, the temperature controlling blow end point is 1370 DEG C (time of blowing is 4.8min).Refrigerant is added (containing the Fe of 45 % by weight when blowing 1min
2o
3, the FeO of 30 % by weight, the SiO of 7 % by weight
2, 3 % by weight Al
2o
3with 2 % by weight TiO
2), add-on is 7.1kg/t low silicon low temperature vanadium-bearing hot metal.V in C content in the half steel obtained after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Embodiment 4
Vanadium extraction by converter blowing is carried out according to the method for embodiment 1, unlike, during blowing oxygen quantity <10%, controlling rifle position is 1.7m; During blowing oxygen quantity=10-85%, controlling rifle position is 2m; During blowing oxygen quantity >85%, controlling rifle position is 1.7m.V in C content in the half steel obtained after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Comparative example 1
140t low silicon low temperature vanadium-bearing hot metal is loaded in converter extracting vanadium, enter stove low silicon low temperature vanadium-bearing hot metal contain 4.50 % by weight C, 0.08 % by weight Si, 0.30 % by weight Mn, Ti, the V of 0.29 % by weight of 0.28 % by weight, the S of the P of 0.069 % by weight and 0.005 % by weight, all the other are Fe.The temperature entering stove low silicon low temperature vanadium-bearing hot metal is 1235 DEG C.By oxygen rifle, (during blowing oxygen quantity <10%, controlling rifle position is 1.7m; During blowing oxygen quantity=10-88%, controlling rifle position is 2m; During blowing oxygen quantity >88%, controlling rifle position is 1.7m) in converter, be blown into oxygen blow, oxygen blast total amount is 12.1m
3/ t low silicon low temperature vanadium-bearing hot metal, the temperature controlling blow end point is 1350 DEG C (time of blowing is 6min).Refrigerant is added (containing the Fe of 30 % by weight when blowing 1min
2o
3, the FeO of 45 % by weight, the SiO of 5 % by weight
2, 2 % by weight Al
2o
3with 5 % by weight TiO
2), add-on is 25kg/t low silicon low temperature vanadium-bearing hot metal.V in C content in the half steel obtained after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Comparative example 2
Vanadium extraction by converter blowing is carried out according to the method for embodiment 1, unlike, the temperature controlling blow end point is 1430 DEG C.V in C content in the half steel obtained after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Comparative example 3
Vanadium extraction by converter blowing is carried out according to the method for embodiment 1, unlike, the add-on of refrigerant is 28kg/t low silicon low temperature vanadium-bearing hot metal.V in C content in the half steel obtained after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Comparative example 4
Vanadium extraction by converter blowing is carried out according to the method for embodiment 1, unlike, during blowing oxygen quantity=10-88%, controlling rifle position is 2.2m.V in C content in the half steel obtained after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Table 1
As can be seen from the result shown in table 1, adopt method of the present invention effectively can reduce the residual content of vanadium of half steel and effectively improve half steel carbon content, after present invention process vanadium extraction, the temperature of half steel is more suitable for the demand of follow-up steel-making.And the grade of the vanadium slag that the inventive method obtains is higher.
In addition, comparing embodiment 1 and embodiment 4 can be found out, control blowing oxygen quantity and rifle potential energy enough obtains more excellent vanadium extraction effect according to the preferred mode of the present invention; The result of comparing embodiment 1 and comparative example 1-4 can be found out, controls the object that the temperature of blow end point, refrigerant consumption and rifle position can realize the present invention's low silicon low temperature vanadium-bearing hot metal vanadium extraction by converter blowing within the scope of the invention.
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 characteristic described in above-mentioned embodiment, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible array mode.
In addition, also can carry out arbitrary combination between various different embodiment of the present invention, 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 (7)
1. a low silicon low temperature vanadium-bearing hot metal vanadium extraction by converter blowing technique, this technique comprises: blown in converter by low silicon low temperature vanadium-bearing hot metal, and adds refrigerant in the process of blowing, it is characterized in that, the temperature controlling blow end point is 1340-1370 DEG C; The consumption of described refrigerant is 5-24kg/t low silicon low temperature vanadium-bearing hot metal; Blowing process be divided into three phases, the rifle position in each stage and blowing oxygen quantity as follows:
First stage: from oxygen blast to oxygen blast to the stage of the 9-12% of oxygen blast total amount, the rifle position controlled in converting process is 1.6-1.8m;
Subordinate phase: from after the first stage to oxygen blast to the stage of the 85-90% of oxygen blast total amount, the rifle position controlled in converting process is 1.9-2.1m;
Phase III: to the end oxygen blown stage after subordinate phase, the rifle position controlled in converting process is 1.6-1.8m;
Wherein, described refrigerant contains the Fe of 30-45 % by weight
2o
3, 30-45 % by weight the SiO of FeO, 5-10 % by weight
2, 2-5 % by weight Al
2o
3with the TiO of 2-5 % by weight
2; Described low silicon low temperature vanadium-bearing hot metal contains the V of Ti and 0.25-0.35 % by weight of Mn, 0.2-0.35 % by weight of Si, 0.2-0.5 % by weight of C, 0.03-0.1 % by weight of 4.1-4.6 % by weight.
2. technique according to claim 1, wherein, the temperature controlling blow end point is 1360-1370 DEG C.
3. technique according to claim 1, wherein, the consumption of described refrigerant is 7-22kg/t low silicon low temperature vanadium-bearing hot metal.
4. technique according to claim 1, wherein, the rifle position in each stage and blowing oxygen quantity as follows:
First stage: from oxygen blast to oxygen blast to the stage of 10% of oxygen blast total amount, the rifle position controlled in converting process is 1.6-1.8m;
Subordinate phase: from after the first stage to oxygen blast to the stage of 88% of oxygen blast total amount, the rifle position controlled in converting process is 1.9-2.1m;
Phase III: to the end oxygen blown stage after subordinate phase, the rifle position controlled in converting process is 1.6-1.8m.
5. according to the technique in claim 1-4 described in any one, wherein, the oxygen blast total amount controlled in converting process is 10-15m
3/ t low silicon low temperature vanadium-bearing hot metal.
6. technique according to claim 5, wherein, the oxygen blast total amount controlled in converting process is 10.5-13m
3/ t low silicon low temperature vanadium-bearing hot metal.
7. technique according to claim 1, wherein, before blowing, temperature≤1250 DEG C of described low silicon low temperature vanadium-bearing hot metal.
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| CN104694698B (en) * | 2015-03-16 | 2016-08-17 | 攀钢集团研究院有限公司 | The control method of slag state when chrome alum is extracted in containing vanadium and chromium molten iron converter |
| CN104711389B (en) * | 2015-03-16 | 2016-08-24 | 攀钢集团研究院有限公司 | The method of adjustment of slag state when chrome alum is extracted in containing vanadium and chromium molten iron converter |
| CN105112596A (en) * | 2015-08-20 | 2015-12-02 | 四川德胜集团钒钛有限公司 | Vanadium extraction process for low-silicon-titanium molten iron |
| CN107641678A (en) * | 2017-09-29 | 2018-01-30 | 四川德胜集团钒钛有限公司 | A kind of vanadium-bearing hot metal vanadium extraction by converter blowing technique |
| CN108018394A (en) * | 2017-12-19 | 2018-05-11 | 攀钢集团西昌钢钒有限公司 | Semisteel smelting depth decarbonization method |
| CN109136445A (en) * | 2018-09-04 | 2019-01-04 | 云南德胜钢铁有限公司 | A kind of vanadium extraction half steel processing technology |
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| CN102660659A (en) * | 2012-04-20 | 2012-09-12 | 北京科技大学 | Converter vanadium extraction process adopting top blowing oxygen lance to blow cooling agents |
| CN103194565A (en) * | 2013-04-28 | 2013-07-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for synchronously dephosphorization and vanadium extraction of vanadium-containing molten iron |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102660659A (en) * | 2012-04-20 | 2012-09-12 | 北京科技大学 | Converter vanadium extraction process adopting top blowing oxygen lance to blow cooling agents |
| CN103194565A (en) * | 2013-04-28 | 2013-07-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for synchronously dephosphorization and vanadium extraction of vanadium-containing molten iron |
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