CN104060021A - Converter vanadium extraction process of low silicon low temperature vanadium-containing molten iron - Google Patents
Converter vanadium extraction process of low silicon low temperature vanadium-containing molten iron Download PDFInfo
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- CN104060021A CN104060021A CN201310431942.0A CN201310431942A CN104060021A CN 104060021 A CN104060021 A CN 104060021A CN 201310431942 A CN201310431942 A CN 201310431942A CN 104060021 A CN104060021 A CN 104060021A
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Abstract
The invention discloses a converter vanadium extraction process of low silicon low temperature vanadium-containing molten iron, and the process comprises blowing of the low silicon low temperature vanadium-containing molten iron in a converter and addition of a coolant in the blowing process, the blowing end point temperature is controlled to be 1340 to 1370 DEG C; the coolant use amount is 5-24kg / t low silicon low temperature vanadium-containing molten iron; the blowing process comprises the following three stages: a first stage from the beginning of the oxygen blowing to the oxygen blowing amount reaching 9-12% of the total oxygen blowing amount, a second stage from the end of the first stage to the oxygen blowing amount reaching 85-90% of the total oxygen blowing amount, and a third stage from the end of the second stage to the end of the oxygen; in the first stage, the gun height of the blowing process is controlled to be 1.6-1.8m; in the second stage, the gun height of the blowing process is controlled to be 1.9-2.1m; and in the third stage, the gun height of the blowing process is controlled to be 1.6-1.8m. Through the converter vanadium extraction process, the obtained vanadium slag is high in grade, obtained semi steel is high in C content and the goal of ''removing vanadium and holding carbon'' can be better realized.
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 it distributes and very disperses, normal and other metallic ore symbiosis, so in the time of exploitation and these ores of processing, vanadium is reclaimed as symbiosis product or byproduct.Vanadium titano-magnetite is the essential mineral resource of vanadium, and vanadium, iron, titanium symbiosis, generally smelted into after molten iron, reoxidizes blowing and obtains vanadium slag as the main raw material of producing vanadium product.The process of producing vanadium slag is called vanadium extraction, and the factory of the vanadium slag of China's production at present mainly contains climbs steel and hold steel.The technique of producing vanadium slag is all to adopt oxygen coverter process for extracting vanadium, and oxygen coverter process for extracting vanadium is mainly by oxygen supply, and the oxide compound that forms 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 ", must be controlled at temperature certain scope in whole vanadium extracting process.Vanadium is the element being very easily oxidized, and is more or less the same with Si, Mn, V oxide compound decomposition pressure.After oxygen supply, Mn, Si in molten iron, Cr, Fe and a small amount of C oxidized entering in vanadium slag simultaneously, except V element, in all the other elements the oxidation heat liberation of Si element in each element oxidising process to converter heat effects maximum.Generally control bath temperature by refrigerant add-on, suppress reaction between carbon and oxygen, allow vanadium in molten iron fast and complete oxidation enters in slag, and carbon few oxidation as far as possible in molten iron, oxidation of coal provides enough heats to heat up when ensureing to make steel.
CN102251070A has introduced one and has utilized CO
2solve and cause the technical problems such as the conversion rate of oxidation of vanadium is low a little less than converter extracting vanadium smelting process temperature control difficulty, stirring capacity, realize the method for converter efficient vanadium extracting, this invention is controlled at times CO to adopting in converter in vanadium extracting process
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 vanadium extraction to protect carbon, 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, still in the laboratory study stage, has not been found industrial application.
CN102127614A has introduced employing analysis of fumes method, and by CO and O
2concentration curve signal is connected on computer, forms continuity curve; Determine adding opportunity of vanadium extraction converting process refrigerant according to the variation of CO content in furnace gas, converting process extends the optimum temps interval of vanadium oxidation, combines and judges vanadium extraction terminal with oxygen consumption in vanadium extraction model.Under equal molten iron condition, introducing this invention half steel carbon can stablize and be controlled at 3.70-3.90%, mean value is 3.86%, improve 0.14 percentage point, Wei Xia road steel making working procedure provides stable half steel condition, effectively stop the terminal after-blow phenomenon causing because of semi-steel making shortage of heat, and the steel quality problem causing because of serious after-blow; Remaining vanadium is controlled 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%, improves 2 percentage points compared with background technology, the rate of recovery of vanadium is corresponding increase also, further improves the key technical indexes of vanadium extraction.But the flue gas analysis method that this method adopts is forecast converter steelmaking process indirectly, yet there are no successful Application in the application of present stage steel-smelting technology, practical application effect need further textual criticism and perfect.
Article " research of 150t vanadium extraction by converter blowing feed pattern ", for improving the recovery rate of vanadium in converter steelmaking process, has carried out exploratory study to add mode and the blowing model of powdered iron ore.But this research is the research of carrying out under laboratory condition, and industrial production is had to certain directive significance, 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, a kind of grade and high vanadium extraction by converter blowing technique of half steel C content that also can ensure the vanadium slag obtaining for low silicon low temperature vanadium-bearing hot metal is provided.
To achieve these goals, the present inventor has carried out a large amount of experiments, found that, the temperature of control blow end point, the consumption of refrigerant and rifle position can be realized the vanadium extraction by converter blowing of 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: low silicon low temperature vanadium-bearing hot metal is blown in converter, and add refrigerant in the process of blowing, it is characterized in that, the temperature of controlling blow end point is 1340-1370 DEG C; The consumption of described refrigerant is the low silicon low temperature of 5-24kg/t vanadium-bearing hot metal; The process of blowing is divided into three phases, and rifle position and the blowing oxygen quantity in each stage are as follows:
First stage: from starting the stage of oxygen blast to oxygen blast to the 9-12% of oxygen blast total amount, the rifle position of controlling in converting process is 1.6-1.8m;
Subordinate phase: from the stage to oxygen blast to the 85-90% of oxygen blast total amount after the first stage, the rifle position of controlling in converting process is 1.9-2.1m;
Phase III: from subordinate phase later to finishing the oxygen blown stage, the rifle position of controlling in converting process is 1.6-1.8m.
Pass through technique scheme, (being that content of vanadium is high and TFe content is low) of high grade of the vanadium slag that the present invention obtains, and, the C content higher (within the scope of 3.7-4.1 % by weight) of the half steel obtaining after the inventive method vanadium extraction by converter blowing, realized preferably the object of " going vanadium to protect carbon ", 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 the embodiment part subsequently.
Embodiment
Below the specific embodiment of the present invention is elaborated.Should be understood that, embodiment described herein only, for description and interpretation the present invention, is not limited to the present invention.
In the present invention, in the situation that not doing contrary explanation, " TFe " and " TFe content " all represents to press the total iron content of ferro element weighing scale; Converting process be by oxygen rifle to the process that is blown into oxygen in converter, the height of the nozzle distance molten bath face (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: low silicon low temperature vanadium-bearing hot metal is blown in converter, and add refrigerant in the process of blowing, it is characterized in that, the temperature of controlling blow end point is 1340-1370 DEG C, is preferably 1360-1370 DEG C; The consumption of described refrigerant is the low silicon low temperature of 5-24kg/t vanadium-bearing hot metal, is preferably the low silicon low temperature of 7-22kg/t vanadium-bearing hot metal; The process of blowing is divided into three phases, and rifle position and the blowing oxygen quantity in each stage are as follows:
First stage: from starting the stage of oxygen blast to oxygen blast to the 9-12% of oxygen blast total amount, the rifle position of controlling in converting process is 1.6-1.8m;
Subordinate phase: from the stage to oxygen blast to the 85-90% of oxygen blast total amount after the first stage, the rifle position of controlling in converting process is 1.9-2.1m;
Phase III: from subordinate phase later to finishing the oxygen blown stage, the rifle position of controlling in converting process is 1.6-1.8m.
In vanadium extraction by converter blowing process, in converting process, add refrigerant to control better temperature, so that the vanadium oxidation in vanadium-bearing hot metal enters into vanadium slag.In the present invention, kind to described refrigerant and add and there is no special requirement opportunity, can adopt the conventional refrigerant in this area and adopt usual manner to add, as long as the consumption of described refrigerant is in above-mentioned scope, for example, can use iron scale as refrigerant.Described refrigerant can add in blowing 1-3min.Under preferable case, the Fe that described refrigerant contains 30-45 % by weight
2o
3, the FeO of 30-45 % by weight, the SiO of 5-10 % by weight
2, 2-5 % by weight Al
2o
3tiO with 2-5 % by weight
2.
A preferred embodiment of the invention, rifle position and the blowing oxygen quantity in each stage are as follows:
First stage: from starting 10% the stage of oxygen blast to oxygen blast to oxygen blast total amount, the rifle position of controlling in converting process is 1.6-1.8m;
Subordinate phase: from stage of 88% to oxygen blast to oxygen blast total amount after the first stage, the rifle position of controlling in converting process is 1.9-2.1m;
Phase III: from subordinate phase later to finishing the oxygen blown stage, the rifle position of controlling in converting process is 1.6-1.8m.
The present inventor finds, can realize better object of the present invention according to the rifle position with each stage in upper type control converting process and blowing oxygen quantity.
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 for the temperature of controlling better blow end point is in above-mentioned scope, preferably, the oxygen blast total amount of controlling in converting process is 10-15m
3the low silicon low temperature of/t vanadium-bearing hot metal (more preferably 10.5-13m
3the low silicon low temperature of/t vanadium-bearing hot metal).The time of blowing can be more preferably 4-5min of 4-6min().In converting process, the flow of oxygen can adopt and well known to a person skilled in the art and parameter be preferably 15000-17000m
3/ h.Flow with described preferred mode control oxygen can more accurately be controlled half composition of steel and temperature.
In the present invention, control rifle position meets above-mentioned optimum condition and can realize better low silicon low temperature vanadium-bearing hot metal vanadium extraction by converter blowing,, can realize better the object of vanadium extraction guarantor carbon that is.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, the C that described low silicon low temperature vanadium-bearing hot metal contains 4.1-4.6 % by weight, the Si of 0.03-0.1 % by weight, Mn, the Ti of 0.2-0.35 % by weight and the V of 0.25-0.35 % by weight of 0.2-0.5 % 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 describe the present invention by embodiment." blowing oxygen quantity " refers to: point at a time, accounts for the per-cent of the oxygen blast total amount in whole converting process toward the amount of the oxygen being blown in converter.
Embodiment 1
In converter extracting vanadium, pack the low silicon low temperature of 140t vanadium-bearing hot metal into, enter C, Si, the Mn of 0.29 % by weight of 0.05 % by weight, the Ti of 0.26 % by weight, V, the P of 0.064 % by weight and the S of 0.005 % by weight of 0.25 % by weight that the low silicon low temperature of stove vanadium-bearing hot metal contains 4.55 % by weight, all the other are Fe.The temperature that enters the low silicon low temperature of stove vanadium-bearing hot metal is 1225 DEG C.By oxygen rifle, (when blowing oxygen quantity <10%, controlling rifle position is 1.7m; When blowing oxygen quantity=10-88%, controlling rifle position is 2m; When blowing oxygen quantity >88%, controlling rifle position is 1.7m) blow to being blown into oxygen in converter, oxygen blast total amount is 11.8m
3the low silicon low temperature of/t vanadium-bearing hot metal, the temperature of controlling blow end point is 1365 DEG C (time of blowing is 5min).In the time of blowing 1min, add the refrigerant (Fe that contains 30 % by weight
2o
3, the FeO of 45 % by weight, the SiO of 5 % by weight
2, 2 % by weight Al
2o
3tiO with 5 % by weight
2), add-on is the low silicon low temperature of 14.3kg/t vanadium-bearing hot metal.V in C content in the half steel obtaining after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Embodiment 2
In converter extracting vanadium, pack the low silicon low temperature of 140t vanadium-bearing hot metal into, enter C, Si, the Mn of 0.26 % by weight of 0.1 % by weight, the Ti of 0.27 % by weight, V, the P of 0.068 % by weight and the S of 0.006 % by weight of 0.28 % by weight that the low silicon low temperature of stove vanadium-bearing hot metal contains 4.45 % by weight, all the other are Fe.The temperature that enters the low silicon low temperature of stove vanadium-bearing hot metal is 1250 DEG C.By oxygen rifle, (when blowing oxygen quantity <10%, controlling rifle position is 1.8m; When blowing oxygen quantity=10-88%, controlling rifle position is 2.1m; When blowing oxygen quantity >88%, controlling rifle position is 1.6m) blow to being blown into oxygen in converter, oxygen blast total amount is 12.8m
3the low silicon low temperature of/t vanadium-bearing hot metal, the temperature of controlling blow end point is 1360 DEG C (time of blowing is 4.5min).In the time of blowing 1min, add the refrigerant (Fe that contains 40 % by weight
2o
3, the FeO of 35 % by weight, the SiO of 10 % by weight
2, 5 % by weight Al
2o
3tiO with 4 % by weight
2), add-on is the low silicon low temperature of 21.4kg/t vanadium-bearing hot metal.V in C content in the half steel obtaining after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Embodiment 3
In converter extracting vanadium, pack the low silicon low temperature of 140t vanadium-bearing hot metal into, enter C, Si, the Mn of 0.30 % by weight of 0.035 % by weight, the Ti of 0.28 % by weight, V, the P of 0.069 % by weight and the S of 0.005 % by weight of 0.29 % by weight that the low silicon low temperature of stove vanadium-bearing hot metal contains 4.45 % by weight, all the other are Fe.The temperature that enters the low silicon low temperature of stove vanadium-bearing hot metal is 1205 DEG C.By oxygen rifle, (when blowing oxygen quantity <10%, controlling rifle position is 1.7m; When blowing oxygen quantity=10-88%, controlling rifle position is 1.9m; When blowing oxygen quantity >88%, controlling rifle position is 1.7m) blow to being blown into oxygen in converter, oxygen blast total amount is 10.9m
3the low silicon low temperature of/t vanadium-bearing hot metal, the temperature of controlling blow end point is 1370 DEG C (time of blowing is 4.8min).In the time of blowing 1min, add the refrigerant (Fe that contains 45 % by weight
2o
3, the FeO of 30 % by weight, the SiO of 7 % by weight
2, 3 % by weight Al
2o
3tiO with 2 % by weight
2), add-on is the low silicon low temperature of 7.1kg/t vanadium-bearing hot metal.V in C content in the half steel obtaining after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Embodiment 4
Carry out vanadium extraction by converter blowing according to the method for embodiment 1, different, when blowing oxygen quantity <10%, controlling rifle position is 1.7m; When blowing oxygen quantity=10-85%, controlling rifle position is 2m; When blowing oxygen quantity >85%, controlling rifle position is 1.7m.V in C content in the half steel obtaining after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Comparative example 1
In converter extracting vanadium, pack the low silicon low temperature of 140t vanadium-bearing hot metal into, enter C, Si, the Mn of 0.30 % by weight of 0.08 % by weight, the Ti of 0.28 % by weight, V, the P of 0.069 % by weight and the S of 0.005 % by weight of 0.29 % by weight that the low silicon low temperature of stove vanadium-bearing hot metal contains 4.50 % by weight, all the other are Fe.The temperature that enters the low silicon low temperature of stove vanadium-bearing hot metal is 1235 DEG C.By oxygen rifle, (when blowing oxygen quantity <10%, controlling rifle position is 1.7m; When blowing oxygen quantity=10-88%, controlling rifle position is 2m; When blowing oxygen quantity >88%, controlling rifle position is 1.7m) blow to being blown into oxygen in converter, oxygen blast total amount is 12.1m
3the low silicon low temperature of/t vanadium-bearing hot metal, the temperature of controlling blow end point is 1350 DEG C (time of blowing is 6min).In the time of blowing 1min, add the refrigerant (Fe that contains 30 % by weight
2o
3, the FeO of 45 % by weight, the SiO of 5 % by weight
2, 2 % by weight Al
2o
3tiO with 5 % by weight
2), add-on is the low silicon low temperature of 25kg/t vanadium-bearing hot metal.V in C content in the half steel obtaining after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Comparative example 2
Carry out vanadium extraction by converter blowing according to the method for embodiment 1, different, the temperature of controlling blow end point is 1430 DEG C.V in C content in the half steel obtaining after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Comparative example 3
Carry out vanadium extraction by converter blowing according to the method for embodiment 1, different, the add-on of refrigerant is the low silicon low temperature of 28kg/t vanadium-bearing hot metal.V in C content in the half steel obtaining after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Comparative example 4
Carry out vanadium extraction by converter blowing according to the method for embodiment 1, different, when blowing oxygen quantity=10-88%, controlling rifle position is 2.2m.V in C content in the half steel obtaining after blowing and V content, vanadium slag
2o
5content and TFe content etc. are in table 1.
Table 1
Can find out from the result shown in table 1, adopt method of the present invention can effectively reduce the residual content of vanadium of half steel and effectively improve half steel carbon content, after technique vanadium extraction of the present invention, 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 can be found out with embodiment 4, enough obtain more excellent vanadium extraction effect according to the present invention's preferred mode control blowing oxygen quantity and rifle potential energy; The result of comparing embodiment 1 and comparative example 1-4 can find out, temperature, refrigerant consumption and the rifle position of controlling blow end point can be realized the object of the low silicon low temperature of the present invention 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 characterictic described in above-mentioned embodiment, in reconcilable situation, can combine by any suitable mode, for fear of unnecessary repetition, the present invention is to the explanation no longer separately of various possible array modes.
In addition, also can carry out arbitrary combination between various 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 (9)
1. a low silicon low temperature vanadium-bearing hot metal vanadium extraction by converter blowing technique, this technique comprises: low silicon low temperature vanadium-bearing hot metal is blown in converter, and add refrigerant in the process of blowing, it is characterized in that, the temperature of controlling blow end point is 1340-1370 DEG C; The consumption of described refrigerant is the low silicon low temperature of 5-24kg/t vanadium-bearing hot metal; The process of blowing is divided into three phases, and rifle position and the blowing oxygen quantity in each stage are as follows:
First stage: from starting the stage of oxygen blast to oxygen blast to the 9-12% of oxygen blast total amount, the rifle position of controlling in converting process is 1.6-1.8m;
Subordinate phase: from the stage to oxygen blast to the 85-90% of oxygen blast total amount after the first stage, the rifle position of controlling in converting process is 1.9-2.1m;
Phase III: from subordinate phase later to finishing the oxygen blown stage, the rifle position of controlling in converting process is 1.6-1.8m.
2. technique according to claim 1, wherein, the temperature of controlling blow end point is 1360-1370 DEG C.
3. technique according to claim 1, wherein, the consumption of described refrigerant is the low silicon low temperature of 7-22kg/t vanadium-bearing hot metal.
4. according to the technique described in claim 1 or 3, wherein, the Fe that described refrigerant contains 30-45 % by weight
2o
3, the FeO of 30-45 % by weight, the SiO of 5-10 % by weight
2, 2-5 % by weight Al
2o
3tiO with 2-5 % by weight
2.
5. technique according to claim 1, wherein, rifle position and the blowing oxygen quantity in each stage are as follows:
First stage: from starting 10% the stage of oxygen blast to oxygen blast to oxygen blast total amount, the rifle position of controlling in converting process is 1.6-1.8m;
Subordinate phase: from stage of 88% to oxygen blast to oxygen blast total amount after the first stage, the rifle position of controlling in converting process is 1.9-2.1m;
Phase III: from subordinate phase later to finishing the oxygen blown stage, the rifle position of controlling in converting process is 1.6-1.8m.
6. according to the technique described in any one in claim 1-5, wherein, the oxygen blast total amount of controlling in converting process is 10-15m
3the low silicon low temperature of/t vanadium-bearing hot metal.
7. technique according to claim 6, wherein, the oxygen blast total amount of controlling in converting process is 10.5-13m
3the low silicon low temperature of/t vanadium-bearing hot metal.
8. technique according to claim 1, wherein, Mn, the Ti of 0.2-0.35 % by weight and the V of 0.25-0.35 % by weight of the C that described low silicon low temperature vanadium-bearing hot metal contains 4.1-4.6 % by weight, the Si of 0.03-0.1 % by weight, 0.2-0.5 % by weight.
9. 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 |
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| 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 |
| CN116005012A (en) * | 2023-03-03 | 2023-04-25 | 攀枝花学院 | Process for extracting vanadium from vanadium-containing molten iron |
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