CN101648728A - Method for recovering vanadium pentoxide from molten iron containing vanadium - Google Patents
Method for recovering vanadium pentoxide from molten iron containing vanadium Download PDFInfo
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Abstract
The invention relates to a method for recovering vanadium pentoxide from molten iron containing vanadium. The method comprises the steps of oxidizing the vanadium in the molten iron into the vanadiumpentoxide, and separating vanadium slag; and the method also comprises the step of contacting the molten iron with a carbon material containing simple substance carbon after oxidizing the vanadium inthe molten iron into the vanadium pentoxide and before separating the vanadium slag. The method can significantly improve the concentration of the vanadium pentoxide in the vanadium slag and the recovery rate of the vanadium pentoxide.
Description
Technical field
The present invention relates to a kind of method that from the molten iron that contains vanadium, reclaims Vanadium Pentoxide in FLAKES.
Background technology
In China, part iron factory adopts v-bearing titanomagnetite smelting, in order to guarantee the resources effective utilization, need carry out process for extracting vanadium before steel-making, make the vanadium in the molten iron be oxidized to Vanadium Pentoxide in FLAKES by oxygen blast, vanadium-bearing hot metal obtains half steel behind vanadium extraction processing, separation vanadium slag.
Carrying out vanadium extraction from hot metal according to existing vanadium extraction by converter blowing technology, the rate of recovery lower, vanadium of Vanadium Pentoxide in FLAKES concentration is lower in the vanadium slag.For example, method elemental silicon content in molten iron according to Comparative Examples 1 is 0.23 weight %, elemental vanadium content is to reclaim Vanadium Pentoxide in FLAKES under the situation of 0.291 weight %, and the content of Vanadium Pentoxide in FLAKES has only 14.1 weight % in the vanadium slag that obtains, and the rate of recovery of Vanadium Pentoxide in FLAKES only is 78.5%.
Summary of the invention
The content of Vanadium Pentoxide in FLAKES is low in the vanadium slag that the objective of the invention is to obtain for the method that reclaims Vanadium Pentoxide in FLAKES from the molten iron that contains vanadium that overcomes prior art, the defective that the rate of recovery of vanadium is low, provide a kind of content of Vanadium Pentoxide in FLAKES that makes in the vanadium slag higher, the method that from the molten iron that contains vanadium, reclaims Vanadium Pentoxide in FLAKES that the rate of recovery of Vanadium Pentoxide in FLAKES is higher.
The present inventor finds that the content of Vanadium Pentoxide in FLAKES is low in the vanadium slag that the vanadium extraction by converter blowing technology of employing prior art obtains, and the major cause that the rate of recovery of Vanadium Pentoxide in FLAKES is low is:
1, in existing vanadium extraction from hot metal technology, oxygen blast vanadium extraction process is the Fe that will contain in the molten iron, V, C, Si, Mn, Ti, elements such as P carry out the process of oxidizing reaction, the oxidized back of elemental silicon in the molten iron generates silicon-dioxide, with ferric oxide (FeO), effect such as manganese oxide (MnO) generates low-melting silicic acid salt faces such as fayalite, thereby the fusing point of vanadium slag is reduced, viscosity degradation, mobile increasing, particularly, when the content of elemental silicon in the molten iron during more than or equal to 0.18 weight %, because low melting point phase ratio is higher in the slag, the slag attitude is rare excessively, increase the loss that vanadium slag in the half steel process, and caused the decline of the Vanadium Pentoxide in FLAKES rate of recovery.
2, the oxidized slag phase that enters of elemental silicon rises the ratio of silicon-dioxide in the thick vanadium slag, and has diluted the content of Vanadium Pentoxide in FLAKES in the vanadium slag.
3, during the vanadium extraction of high silicon iron water in rare, the slag of slag attitude total iron (comprise FeO and Fe
2O
3) content height (about 28-30%), the quantity of slag of being taken out of by half steel when separating half steel and vanadium slag is big, because the oxidisability of vanadium slag is strong, too much vanadium slag half steel after half steel is transferred to the half steel jar is in a large number easily being seethed, cause pyritous slag steel reinforced concrete compound to overflow the half steel jar, threaten half steel to transport operating personnel along the line and device security.
4, oxygen blast vanadium extraction process is the process that elements such as Fe, the V that will contain in the molten iron, C, Si, Mn, Ti, P carry out oxidizing reaction, the speed of these element oxidizing reactions depends on the content of this element in the molten iron, the thermodynamics and kinetics condition when blowing vanadium, and the size of response capacity depends on chemical affinity---G ° of the standard free energy of formation Δ of each component and oxygen in the molten iron.When the too high levels of elemental silicon in the molten iron, because silicon is stronger than the avidity of vanadium and oxygen with the avidity of oxygen, when elemental silicon content is higher in the molten iron, oxidation that will the inhibition vanadium.And the higher meeting of elemental silicon content causes the intensification in melt tank reaction zone in the converter to accelerate in the molten iron, the rate of oxidation that temperature of reaction is got over high-carbon rate of oxidation quickening vanadium then slows down, suitable temperature of reaction can guarantee that the equilibrium of the oxidizing reaction rate of carbon-vanadium carries out, accelerate then shortened the vanadium extraction bath temperature to be in " carbon-vanadium invert point " following time if heat up, and suppressed the oxidation of vanadium.
According to method of the present invention, on the one hand, after the vanadium in the molten iron is oxidized to Vanadium Pentoxide in FLAKES, separate before the vanadium slag, molten iron is contacted with the carbonaceous material that contains simple substance carbon, can make carbon and the reaction of the ferric oxide in the vanadium slag in this carbonaceous material, with iron oxide reduction is fe, half steel is returned in the sedimentation in grate and/or bottom blowing nitrogen-burst agitation process or in the tapping process of iron in the reaction product, another reaction product carbon monoxide is discharged with furnace gas, or with ferric oxide generation reduction reaction, iron is reduced in the half steel, the carbonic acid gas that produces enters atmosphere, to improve the concentration of Vanadium Pentoxide in FLAKES in the vanadium slag, the more important thing is that the present inventor finds, the ferric oxide fusing point is 1370 ℃, the reduction of low melting point phase oxidation iron level has the effect of obvious reduction vanadium slag fusing point, and slag viscosity is significantly improved.
When the half steel that separates vanadium slag and obtain, can reduce the amount of the vanadium slag that runs off with half steel, help improving the rate of recovery of Vanadium Pentoxide in FLAKES.
The invention provides a kind of method that from the molten iron that contains vanadium, reclaims Vanadium Pentoxide in FLAKES, this method comprises the vanadium in the molten iron is oxidized to Vanadium Pentoxide in FLAKES, and separation vanadium slag, wherein, this method also is included in the vanadium in the molten iron is oxidized to after the Vanadium Pentoxide in FLAKES, separates before the vanadium slag, and molten iron is contacted with the carbonaceous material that contains simple substance carbon.
Adopt method provided by the invention, under identical molten iron condition, compare with the method that adopts prior art, the content of Vanadium Pentoxide in FLAKES is 15.3 weight % in the vanadium slag that the method for the embodiment of the invention 1 obtains, and has improved 8.5% than Comparative Examples 1; The rate of recovery of Vanadium Pentoxide in FLAKES has reached 79.6%, has improved 1.4% than Comparative Examples 1.In addition, method of the present invention workable, simple, safe and reliable, the stable content of Vanadium Pentoxide in FLAKES in the vanadium slag.The raising of pentoxide content helps follow-up process for making and organization of production in the vanadium slag, produces reduction vanadium production of articles cost for follow-up water law vanadium extraction technical guarantee is provided.Simultaneously, method of the present invention can also reduce the loss of metallic iron in the vanadium extraction from hot metal process.
Embodiment
According to method of the present invention, this method comprises and is oxidized to after the Vanadium Pentoxide in FLAKES, separates before the vanadium slag containing vanadium in the molten iron of vanadium, and molten iron is contacted with the carbonaceous material that contains simple substance carbon.
Method of the present invention is applicable to the molten iron of various conditions, is benchmark in the weight with molten iron particularly, and under the molten iron condition of the content of elemental silicon more than or equal to 0.18 weight %, the recovering effect of Vanadium Pentoxide in FLAKES is better in the described molten iron.
According to the present invention, the described carbonaceous material that contains simple substance carbon can be the various carbonaceous materials that contain simple substance carbon, under the preferable case, in order more to help the reaction of carbonaceous material and vanadium slag, the content of simple substance carbon is not less than 85 weight % in the described carbonaceous material that contains simple substance carbon, as being selected from coal, graphite and the class graphite one or more.The described carbonaceous material that contains simple substance carbon can be commercially available, also can be according to well known to a person skilled in the art the method preparation.Class graphite be a kind of be the natural mineral of main component with carbon, it can be commercially available, and for example, meets the steel-making class graphite of YB/T 044-2007 standard.
According to method of the present invention, the adjustable extent broad of the consumption of the described carbonaceous material that contains simple substance carbon, under the preferable case, with respect to molten iron per ton, in simple substance carbon, the described consumption that contains the carbonaceous material of simple substance carbon is the 1.1-2.1 kilogram.
More preferably under the situation, according to a specific embodiment of the present invention, when the gross weight with molten iron is a benchmark, when the content of elemental silicon is 0.18-0.21 weight %, with respect to molten iron per ton, in simple substance carbon, the described consumption that contains the carbonaceous material of simple substance carbon is the 1.1-1.7 kilogram.
Perhaps, according to another embodiment of the present invention, when the gross weight with molten iron is a benchmark, the content of silicon is during greater than 0.21 weight %, with respect to molten iron per ton, in simple substance carbon, the consumption that contains the carbonaceous material of simple substance carbon is greater than 1.7 kilograms to 2.1 kilograms.
The carbonaceous material that contains simple substance carbon provided by the invention can be made the particle of different shape, as bulk.Described blocky particles of carbonaceous material can be stock size, and for example, the volume of described blocky carbonaceous material can be the 5-30 cubic centimetre, is preferably the 10-20 cubic centimetre.
According to the present invention, molten iron can be adopted variety of way with contacting of the carbonaceous material that contains simple substance carbon, because the vanadium slag that generates floats over the molten iron upper strata, generally, to be the carbonaceous material that will contain simple substance carbon by intake chute, feed bin blanking pipeline or mode such as manually feed intake from the top of container join the molten iron contacts with molten iron.
According to method of the present invention, under the preferable case, when this method also is included in molten iron is contacted with the carbonaceous material that contains simple substance carbon, in molten iron, be blown into nitrogen, because after adding this carbonaceous material, carbonaceous material is the upper strata that floats over molten iron, for carbonaceous material and the vanadium slag that is positioned at the upper strata are fully reacted, after in molten iron, being blown into nitrogen, make liquid level produce fluctuation, reach the purpose that carbonaceous material can fully be reacted with vanadium slag, the adjustable extent broad of described nitrogen flow is under the preferable case, with respect to drop per ton, the flow of described nitrogen be the 0.3-1.5 cubic meter/hour, be preferably the 0.7-1.5 cubic meter/hour; The time that feeds nitrogen can be 1-5 minute, is preferably 2-4 minute.
According to method of the present invention, in order to make the more complete of the carbonaceous material that contains simple substance carbon and vanadium slag reaction, under the preferable case, when this method also is included in molten iron is contacted with carbonaceous material, the container that fills molten iron is swung with the pivot angle that is less than or equal to 45 °, also can be called grate, the purpose of grate also is to make liquid level produce fluctuation, reaches the purpose that slag supplying agent can fully be reacted with vanadium slag.The time of swing is not particularly limited, and can be 1-5 minute, is preferably 2-4 minute and gets final product.Described pivot angle refers to the maximum amplitude of this reactor that fills molten iron swing and the angle between this reactor vertical position.
According to method of the present invention, the method that vanadium in the molten iron is oxidized to Vanadium Pentoxide in FLAKES can be the whole bag of tricks known in those skilled in the art, for example, in molten iron, be blown into oxygen, the purpose that is blown into oxygen is with the iron in the molten iron, vanadium, carbon, manganese, element such as titanium and phosphorus carries out oxidizing reaction and generates oxide compound, slag making, the described method that is blown into oxygen can adopt the whole bag of tricks in the process for extracting vanadium well known in the art, for example, adopt the oxygen rifle to molten iron, to be blown into oxygen from the top of the container that fills molten iron, described oxygen pressure is the 0.6-0.8 MPa, be preferably the 0.65-0.75 MPa, with respect to molten iron per ton, oxygen-supplying amount is the 5-15 cubic meter, is preferably the 8-12 cubic meter, oxygen supply time is 3-8 minute, is preferably 4-6 minute.
After oxygen blast finishes, promptly can carbonaceous material be contacted the half steel that separates vanadium slag then and obtain with molten iron according to method of the present invention.The method of described separation vanadium slag and the half steel that obtains can adopt and well known to a person skilled in the art various separation methods, because vanadium slag and half steel layering, and vanadium slag is positioned at the upper strata, therefore, can utilize the principle of separating funnel, directly half steel is discharged from container bottom, and vanadium slag is stayed in the container, discharge from container more after a while.
According to commercial run, generally, behind every smelting 3-5 stove, just the vanadium slag that obtains is discharged converter together, and add carbonaceous material again after only needing a stove oxygen blast in the end to smelt end.Behind every refining one stove molten iron, the major part that will obtain (the 95-98 weight % of whole approximately half steels) half steel is separated from the converter bottom earlier, vanadium slag and small part half steel are stayed in the stove, proceed the smelting of next stove molten iron, because when separating half steel, vanadium slag is in the upper strata, most of half steel is discharged vanadium slag is discharged thereupon together.In addition, in oxygen blown process, partial molten iron can be oxidized into ferric oxide and be retained in the vanadium slag, after too much stove is smelted, a stove oxygen blast in the end finishes the back and adds carbonaceous material, make the ferric oxide stayed in the vanadium slag can be fully and the carbonaceous material reaction, make it to be reduced to iron and the concentration that improves Vanadium Pentoxide in FLAKES in the vanadium slag, and reduce the loss of metallic iron.And then separate half steel and the vanadium slag obtain fully.According to this commercial run, can determine the amount of the carbonaceous material of adding according to average silicone content in many stoves molten iron.
Method of the present invention only relates to the improvement to Vanadium Pentoxide in FLAKES recovery method in the vanadium slag, all can be to the method for converter steelmaking and other condition according to well known to a person skilled in the art that method and condition carry out, for example, send converter or Electric furnace steel making after isolating half steel, the temperature of converter steelmaking is generally 1600-1700 ℃.
Mode below by embodiment further describes the present invention.
Embodiment 1
Present embodiment is used for illustrating the method that reclaims Vanadium Pentoxide in FLAKES from high silicon iron water provided by the invention.
With the vanadium-bearing hot metal that blast-furnace smelting goes out, behind desulphurization and slag skimming, obtain containing the vanadium desulphurised hot metal, vanadium extraction 4 stoves that blow in 120 tons converter, the average iron water amount of 4 stoves is 140 a tons/stove.
The main component that contains the vanadium desulphurised hot metal according to YB/T5125-2006 (this standard is People's Republic of China's ferrous metallurgy industry standard) this 4 stove of sampling and measuring is: C (4.51-4.94 weight %), average content is 4.88 weight %, V (0.287-0.294 weight %), average content is 0.289 weight %, Si (0.213-0.232 weight %), average content is 0.23 weight %, and surplus is mainly Fe.
Oxygen is blown into by the oxygen rifle by the converter top (oxygen pressure is 0.7 MPa in the converter, with respect to molten iron per ton, oxygen-supplying amount is 9.8 cubic metres), the time of aerating oxygen is 5 minutes, smelt 4 stoves continuously according to above-mentioned condition, most of half steel that will obtain behind every refining 1 furnace accretion bundle (the 96 weight % that are about whole half steels) is discharged from the converter bottom, vanadium slag and small part half steel (the 4 weight % that are about whole half steels) are stayed in the stove, after the 4th stove finishing blowing, before going out half steel, adding 300 kilograms of hard coals (simple substance carbon content is 90 weight %, and the particulate volume is the 10-20 cubic centimetre) in molten iron, is 45 ° angle swinging grate 2 minutes with pivot angle, simultaneously, to molten iron, be blown into nitrogen (pressure 0.78 MPa, with respect to molten iron per ton, the flow of nitrogen is 1.14 cubic metres/hour) 2 minutes from the converter bottom, separate half steel and vanadium slag then fully, obtain 23.0 tons of GB vanadium slags altogether, and be: CaO 2.4 weight %, V according to the main component of this vanadium slag of YB/T008-2006 sampling and measuring
2O
515.3 weight %, SiO
218.9 weight %, TFe 23.4 weight %.And calculating the rate of recovery of Vanadium Pentoxide in FLAKES according to the following equation, the result is as shown in table 1.
The rate of recovery (%)=GB vanadium slag weight * 10% * (102/182)/(the average percentage composition of vanadium in molten iron gross weight * molten iron)
Embodiment 2
Present embodiment is used for illustrating the method that reclaims Vanadium Pentoxide in FLAKES from high silicon iron water provided by the invention.
With the vanadium-bearing hot metal that blast-furnace smelting goes out, behind desulphurization and slag skimming, obtain containing the vanadium desulphurised hot metal, vanadium extraction 3 stoves that blow in 120 tons converter, the average iron water amount of 3 stoves is 142 a tons/stove.
The main component that contains the vanadium desulphurised hot metal according to this 3 stove of GB YB/T5125-2006 sampling and measuring is: C (4.68-4.88 weight %), average content is 4.75 weight %, V (0.275-0.29 weight %), average content is 0.285 weight %, Si (0.15-0.234 weight %), average content is 0.189 weight %, and surplus is mainly Fe.
Oxygen is blown into by the oxygen rifle simultaneously by converter top and bottom (oxygen pressure is 0.69 MPa in the converter, with respect to molten iron per ton, oxygen-supplying amount is 10.3 cubic metres, the time of aerating oxygen is 5.3 minutes) smelt 3 stoves continuously according to above-mentioned condition, most of half steel that will obtain behind every refining 1 furnace accretion bundle (the 95 weight % that are about whole half steels) is discharged from the converter bottom, vanadium slag and small part half steel (the 5 weight % that are about whole half steels) are stayed in the stove, after the 3rd stove finishing blowing, before going out half steel, (simple substance carbon content is 85% to add 250 kilograms of hard coals in molten iron, the particulate volume is the 10-20 cubic centimetre), it with pivot angle 45 ° angle swinging grate 2 minutes, and to molten iron, be blown into nitrogen (pressure 0.79 MPa, with respect to molten iron per ton, 1 cubic metre/hour of the flow of nitrogen) from converter bottom 1.5 minutes, separate half steel and vanadium slag then fully, obtain 17.33 tons of GB vanadium slags altogether, and be: CaO 2.0 weight %, V according to the main component of this vanadium slag of YB/T008-2006 sampling and measuring
2O
516.5 weight %, SiO
215.9 weight %, TFe 26.4 weight %.And calculating the rate of recovery of Vanadium Pentoxide in FLAKES according to the formula of embodiment 1, the result is as shown in table 1.
Embodiment 3
Present embodiment is used for illustrating the method that reclaims Vanadium Pentoxide in FLAKES from high silicon iron water provided by the invention.
With the vanadium-bearing hot metal that blast-furnace smelting goes out, behind desulphurization and slag skimming, obtain containing the vanadium desulphurised hot metal, at 120 tons of vanadium extraction by converter blowing, 3 stoves that blow, the average iron water amount of 3 stoves is 141 a tons/stove.The main component that contains the vanadium desulphurised hot metal according to this 3 stove of YB/T5125-2006 sampling and measuring is: C (4.40-4.74 weight %), average content is 4.55 weight %, V (0.299-0.302 weight %), average content is 0.301 weight %, Si (0.134-0.274 weight %), average content is 0.193 weight %, and surplus is mainly Fe.
Oxygen is blown into by the oxygen rifle simultaneously by converter top and bottom (oxygen pressure is 0.7 MPa in the converter, with respect to molten iron per ton, oxygen-supplying amount is 10 cubic metres, the time that is blown into oxygen is 5.2 minutes) smelt 3 stoves continuously according to above-mentioned condition, most of half steel that will obtain behind every refining 1 furnace accretion bundle (the 96 weight % that are about whole half steels) is discharged from the converter bottom, vanadium slag and small part half steel (the 4 weight % that are about whole half steels) are stayed in the stove, after the 3rd stove finishing blowing, before going out half steel, (simple substance carbon content is 95% to add 250 kilograms of graphite in molten iron, the particulate volume is the 10-20 cubic centimetre), it with pivot angle 40 ° angle swinging grate 2 minutes, and to molten iron, be blown into nitrogen (pressure 0.75 MPa, with respect to molten iron per ton, 1.2 cubic metres/hour of the flows of nitrogen) from converter bottom 2 minutes, separate half steel and vanadium slag then fully, obtain 17.89 tons of GB vanadium slags altogether, and be: CaO 2.27 weight %, V according to the main component of this vanadium slag of YB/T008-2006 sampling and measuring
2O
515.5 weight %, SiO
215.4 weight %, TFe 26.5 weight %, and calculate the rate of recovery of Vanadium Pentoxide in FLAKES according to the formula of embodiment 1, the result is as shown in table 1.
Embodiment 4
Present embodiment is used for illustrating the method that reclaims Vanadium Pentoxide in FLAKES from high silicon iron water provided by the invention.
Method according to embodiment 1 reclaims Vanadium Pentoxide in FLAKES, and different is not swing grate.Obtain 22.8 tons of GB vanadium slags at last, and be: CaO 2.35 weight %, V according to the main component of this vanadium slag of YB/T008-2006 sampling and measuring
2O
514.85 weight %, SiO
218.5 weight %, TFe 26.0 weight %, and calculate the rate of recovery of vanadium according to the formula of embodiment 1, the result is as shown in table 1.
Embodiment 5
Present embodiment is used for illustrating the method that reclaims Vanadium Pentoxide in FLAKES from high silicon iron water provided by the invention.
Method according to embodiment 1 reclaims Vanadium Pentoxide in FLAKES, different is, the main component that contains the vanadium desulphurised hot metal according to this 4 stove of YB/T5125-2006 sampling and measuring is: C (4.41-4.91 weight %), average content is 4.85 weight %, V (0.285-0.295 weight %), average content is 0.290 weight %, Si (0.12-0.178 weight %), average content is 0.165 weight %, and surplus is mainly Fe.After the 4th stove finishing blowing, before going out half steel, (simple substance carbon content is 80 weight % to add 180 kilograms of hard coals in molten iron, the particulate volume is the 10-20 cubic centimetre), obtain 23.3 tons of GB vanadium slags at last, and be: CaO 2.0 weight %, V according to the main component of this vanadium slag of YB/T008-2006 sampling and measuring
2O
516.1 weight %, SiO
215.8 weight %, TFe 25.4 weight %, and calculate the rate of recovery of vanadium according to the formula of embodiment 1, the result is as shown in table 1.
Comparative Examples 1
This Comparative Examples is used for illustrating the reference method that reclaims Vanadium Pentoxide in FLAKES from high silicon iron water.
Method according to embodiment 1 reclaims Vanadium Pentoxide in FLAKES from high silicon iron water, different is, in last stove molten iron, do not add the carbonaceous material hard coal, do not carry out the operation of bottom blowing nitrogen and swing grate yet, obtain 22.82 tons of GB vanadium slags at last, and be: CaO 2.2 weight %, V according to the main component of this vanadium slag of YB/T008-2006 sampling and measuring
2O
514.1 weight %, SiO
218.7 weight %, TFe 27.1 weight %, and calculate the rate of recovery of vanadium according to the formula of embodiment 1, the result is as shown in table 1.
Table 1
| Embodiment or Comparative Examples numbering | The average content of Si (%) in the molten iron | V in the vanadium slag 2O 5Content (%) | ??V 2O 5The rate of recovery (%) |
| Embodiment 1 | ??0.230 | ??15.3 | ??79.6 |
| Comparative Examples 1 | ??0.230 | ??14.1 | ??78.5 |
| Embodiment 2 | ??0.189 | ??16.5 | ??81.1 |
| Embodiment 3 | ??0.193 | ??15.5 | ??80.1 |
| Embodiment 4 | ??0.230 | ??14.9 | ??79.0 |
| Embodiment 5 | ??0.176 | ??16.1 | ??80.0 |
According to the data in the table 1 as can be seen, under the identical molten iron condition, compare, adopt V in the vanadium slag that method of the present invention (embodiment 1) obtains with existing technology (Comparative Examples 1)
2O
5Content improved 8.5%, because vanadium slag retrogradation, tapping process vanadium slag number of dropouts reduces, and the rate of recovery of Vanadium Pentoxide in FLAKES has improved 1.4%, illustrates to adopt method of the present invention can significantly improve the concentration of Vanadium Pentoxide in FLAKES in the vanadium slag and the rate of recovery of Vanadium Pentoxide in FLAKES.
Claims (9)
1, a kind of method that from the molten iron that contains vanadium, reclaims Vanadium Pentoxide in FLAKES, this method comprises the vanadium in the molten iron is oxidized to Vanadium Pentoxide in FLAKES, and separation vanadium slag, it is characterized in that, this method also is included in the vanadium in the molten iron is oxidized to after the Vanadium Pentoxide in FLAKES, separates before the vanadium slag, and molten iron is contacted with the carbonaceous material that contains simple substance carbon.
2, method according to claim 1, wherein, the condition that molten iron contacts with the carbonaceous material that contains simple substance carbon comprises that be 1-5 minute duration of contact, with respect to molten iron per ton, in simple substance carbon, the consumption that contains the carbonaceous material of simple substance carbon is the 1.1-2.1 kilogram.
3, method according to claim 1 and 2, wherein, the content of simple substance carbon is not less than 85 weight % in the described carbonaceous material that contains simple substance carbon.
4, method according to claim 1 and 2, wherein, the described carbonaceous material of simple substance carbon that contains is for block; The volume of this block carbon material is the 5-30 cubic millimeter.
5, method according to claim 1 and 2, wherein, the described carbonaceous material that contains simple substance carbon is selected from one or more in coal, graphite and the class graphite.
6, method according to claim 1 and 2 wherein, is a benchmark with the weight of molten iron, and the content of elemental silicon is more than or equal to 0.18 weight % in the described molten iron.
7, method according to claim 1, wherein, this method also comprises when molten iron contacted with carbonaceous material, is blown into nitrogen in molten iron, with respect to molten iron per ton, the flow of nitrogen be the 0.3-1.5 cubic meter/hour, the time that feeds nitrogen is 1-5 minute.
8, according to claim 1 or 7 described methods, wherein, this method also comprises when molten iron contacted with carbonaceous material, and the container that fills molten iron is swung with the pivot angle that is less than or equal to 45 °, and the time of swing is 1-5 minute.
9, method according to claim 1, wherein, the method that the vanadium in the molten iron is oxidized to Vanadium Pentoxide in FLAKES is for being blown into oxygen in molten iron, described oxygen pressure is the 0.6-0.8 MPa, with respect to molten iron per ton, oxygen-supplying amount is the 5-15 cubic meter, and oxygen supply time is 3-8 minute.
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| CN107312905A (en) * | 2017-07-03 | 2017-11-03 | 攀枝花学院 | A kind of high-grade vanadium slag and preparation method thereof |
| CN109957635A (en) * | 2019-03-29 | 2019-07-02 | 承德钢铁集团有限公司 | A kind of carbon-based vanadium slag modifying agent and its method applied to efficient vanadium extraction by converter blowing |
| CN115849890A (en) * | 2022-11-25 | 2023-03-28 | 东北大学 | Preparation method of vanadium pentoxide/calcium oxide diffusion couple |
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2008
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102605182A (en) * | 2011-12-27 | 2012-07-25 | 江苏江南铁合金有限公司 | Method for Production 70# ferrotitanium with high titanium by perrin process |
| CN107312905A (en) * | 2017-07-03 | 2017-11-03 | 攀枝花学院 | A kind of high-grade vanadium slag and preparation method thereof |
| CN109957635A (en) * | 2019-03-29 | 2019-07-02 | 承德钢铁集团有限公司 | A kind of carbon-based vanadium slag modifying agent and its method applied to efficient vanadium extraction by converter blowing |
| CN115849890A (en) * | 2022-11-25 | 2023-03-28 | 东北大学 | Preparation method of vanadium pentoxide/calcium oxide diffusion couple |
| CN115849890B (en) * | 2022-11-25 | 2023-08-08 | 东北大学 | Preparation method of vanadium pentoxide/calcium oxide diffusion couple |
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