CN102559986B - Method for single-stage vanadium extraction in same converter - Google Patents
Method for single-stage vanadium extraction in same converter Download PDFInfo
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- CN102559986B CN102559986B CN201210040322.XA CN201210040322A CN102559986B CN 102559986 B CN102559986 B CN 102559986B CN 201210040322 A CN201210040322 A CN 201210040322A CN 102559986 B CN102559986 B CN 102559986B
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Abstract
The invention discloses a method for single-stage vanadium extraction in the same converter. In a blowing early stage, lime is not added for slagging, vanadium in molten iron is oxidized to enter slag, and silicon, manganese and titanium in the molten iron are oxidized to enter a slag phase; and blowing is stopped after the vanadium is oxidized, vanadium slag is discharged, lime and other slag formers are added for slagging and steelmaking, and qualified molten steel is produced. Compared with the prior art, the method for single-stage vanadium extraction in the same converter has the advantages of reducing temperature loss in the vanadium extracting process, improving the production efficiency of a converter workshop and reducing production cost.
Description
Technical field
The present invention relates to battery production field, exactly refer to a kind of method of single-stage vanadium extraction in same converter.
Background technology
Vanadium, as a kind of important metal, all has widely and uses in numerous fields.The vanadium resource in the world is very limited at present, it is mainly derived from vanadium titano-magnetite, vanadium titano-magnetite is very large containing ratio shared in vanadium resource, and the main path that reclaims vanadium from this ore deposit is to be pig iron containing vanadium by v-ti magnetite green ore by blast-furnace smelting, then from pig iron containing vanadium, reclaims vanadium.The method of vanadium extraction from hot metal mainly contains the shaking ladle vanadium extraction in South Africa and Chinese converter top end duplex practice vanadium extraction at present.And the converter duplex method process for extracting vanadium of China not only needs independent converter to carry out vanadium extraction from hot metal, molten iron calorific loss in vanadium extracting process is very large simultaneously, causes steel scrap treatment capacity to reduce.
Summary of the invention
For above-mentioned defect, the technical problem that the present invention solves is to provide a kind of method of single-stage vanadium extraction in same converter, can reduce the temperature loss in vanadium extracting process, improves the production efficiency of converter mill, reduces production costs.
In order to solve above technical problem, the method for single-stage vanadium extraction in same converter provided by the invention, comprises the following steps:
(1), vanadium-bearing hot metal packs converter into, wherein the carbon content of molten iron is not less than 3.6%, content of vanadium is not less than 0.20%, molten iron temperature is between 1250 ℃～1290 ℃, silicon, manganese, titanium total content are no more than 0.90%, silicon, titanium total content are no more than 0.60%;
(2), molten iron pretreatment desulfurizing, below desulfurizing iron to 0.070%;
(3), remove the dregs in molten iron, make the band quantity of slag of molten iron be less than or equal to 0.5%;
(4), molten iron thermometric and sampling, enter stove hot metal composition, temperature and need meet the requirement of step (1), (2);
(5), early stage blow vanadium, blow the oxygen operating pressure 0.7-0.8MPa of vanadium, oxygen-supplying amount is 11400-12000Nm
3/ h, oxygen supply intensity 2.15-2.55m
3/ (min.t), bottom blowing nitrogen intensity 0.20-0.40m
3/ (min.t), blow the vanadium time to be controlled at 3～6min, the substantially oxidized slag phase that enters of vanadium, wherein molten iron point temperature is controlled between 1430 ℃～1480 ℃;
(6), to the whipping agent and the poly-slag agent that add 40-60Kg in the molten iron of converter, gather slag, it is fixed that concrete whipping agent and poly-slag agent add-on are looked concrete the condition of production, to be that slag is rare add principle, slag is thick to be added less;
(7), vanadium slag is grilled in vanadium slag tank, takes off the vanadium slag time to complete in 1min-3min, and then carry out vanadium extraction.
Preferably, in step (1), vanadium-bearing hot metal Intake Quantity is controlled at 79.0 tons/stove～82.0 ton/stove.
Preferably, in step (2), the sulphur load≤0.070% of the molten iron after molten iron pretreatment desulfurizing, desulfurization periodic Control is in 20min.
Preferably, in step (4), if molten iron does not reach requirement, molten iron is directly used in to steel-making, does not carry out vanadium extraction processing.
Preferably, the method for single-stage vanadium extraction in same converter also comprises step (8): molten iron adds lime to adjust basicity to 3.5-4.5 after taking off vanadium slag.
Preferably, the method for single-stage vanadium extraction in same converter also comprises step (9): the later stage is blown carbon, blows the oxygen operating pressure 0.80-0.90MPa of carbon, and oxygen-supplying amount is 16500-18500Nm
3/ h, oxygen supply intensity 3.2-4.0Nm
3/ (min.t), bottom blowing (N
2) intensity 0.20-0.40m
3/ (min.t).
Preferably, the method for single-stage vanadium extraction in same converter also comprises step (10): tapping.
Compared with prior art, the method of single-stage vanadium extraction in same converter provided by the invention, solve traditional converter duplex vanadium extracting method needs the defective workmanship of the independent converter refining of independent vanadium extraction by converter blowing half steel in vanadium extracting process, also solve the problem that its thermosteresis is large simultaneously, making vanadium extraction from hot metal make steel whole process carries out in same converter, when the maximum utilization that reaches vanadium resource is reclaimed, reduce the converter process energy consumption of its production process, for vanadium extraction from hot metal process for making provides the road of a low cost production.
Accompanying drawing explanation
Fig. 1 is the process flow sheet of the method for single-stage vanadium extraction in same converter provided by the invention.
Embodiment
For those skilled in the art can understand technical scheme provided by the present invention better, set forth below in conjunction with specific embodiment.
Refer to Fig. 1, the process flow sheet of the method that this figure is single-stage vanadium extraction in same converter provided by the invention.
Vanadium extraction by converter blowing principle of the present invention is as follows: vanadium extraction by converter blowing is exactly the principle of utilizing selective oxidation, adopt high speed oxygen jet in converter, vanadium-bearing hot metal to be stirred, vanadium in molten iron is oxidized to stable barium oxide, to produce a kind of physical-chemical reaction process of vanadium slag.In reaction process, by adding refrigerant control bath temperature below carbon vanadium invert point, reach the object of " going vanadium to protect carbon ", to obtain high-grade vanadium slag and high physical thermal, produce commodity vanadium slag for next step and supply raw materials.
Same stove single-link procedure vanadium extraction principle of the present invention is as follows: do not add lime slag making at Primary period, first the vanadium in molten iron is oxidized into slag, simultaneously silicon, manganese, the also oxidized slag phase that enters of titanium in molten iron.After the oxidation of vanadium finishes, suspend blowing, vanadium slag is clawed, then add lime and other slag former slagging and producing steels, and then produce qualified molten steel.
Be below in the present invention converter with two specific embodiments of the method for stove simply connected vanadium extraction.
Embodiment 1
The method of the single-stage vanadium extraction in same converter that the present embodiment provides, comprises the following steps:
(1), vanadium-bearing hot metal packs converter into, Intake Quantity is controlled at 82.0 tons/stove, wherein the carbon content of molten iron is 3.6%, is 0.20%, molten iron temperature is at 1290 ℃, silicon, manganese, titanium total content are 0.90%, silicon, titanium total content are 0.60%;
(2), molten iron pretreatment desulfurizing, by desulfurizing iron to 0.070%;
(3), remove the dregs in molten iron, the band quantity of slag that makes molten iron is 0.5%;
(4), molten iron thermometric and sampling, stove hot metal composition, temperature need meet the requirement of step (1), (2), and molten iron+pig is blended in converter;
(5), early stage blow vanadium, blow the oxygen operating pressure 0.8MPa of vanadium, oxygen-supplying amount is 12000Nm
3/ h, oxygen supply intensity 2.35m
3/ (min.t), bottom blowing nitrogen intensity 0.27m
3/ (min.t), blow the vanadium time to be controlled at 6min, the substantially oxidized slag phase that enters of vanadium, wherein molten iron point temperature is controlled between 1480 ℃;
(6), to the whipping agent and the poly-slag agent that add 40-60Kg in the molten iron of converter, gather slag, it is fixed that concrete whipping agent and poly-slag agent add-on are looked concrete the condition of production, to be that slag is rare add principle, slag is thick to be added less;
(7), vanadium slag is grilled in vanadium slag tank, takes off the vanadium slag time to complete in 3min, and then carry out vanadium extraction.
In step (2), the sulphur load≤0.070% of the molten iron after molten iron pretreatment desulfurizing, desulfurization periodic Control is in 20min.
In step (4), if molten iron does not reach requirement, molten iron is directly used in to steel-making, does not carry out vanadium extraction processing.
The method of single-stage vanadium extraction in same converter also comprises step (8): molten iron adds lime to adjust basicity to 4.5 after taking off vanadium slag.
The method of single-stage vanadium extraction in same converter also comprises step (9): the later stage is blown carbon, blows the oxygen operating pressure 0.90MPa of carbon, and oxygen-supplying amount is 18500Nm
3/ h, oxygen supply intensity 4.0Nm
3/ (min.t), bottom blowing nitrogen intensity 0.27m
3/ (min.t).
The method of single-stage vanadium extraction in same converter also comprises step (10): tapping.
Embodiment 2
The method of the single-stage vanadium extraction in same converter that the present embodiment provides, comprises the following steps:
(1), vanadium-bearing hot metal packs converter into, Intake Quantity is controlled at 79.0 tons/stove, wherein the carbon content of molten iron is 5.8%, content of vanadium is 0.40%, molten iron temperature is at 1250 ℃, silicon, manganese, titanium total content are 0.50%, silicon, titanium total content are 0.40%;
(2), molten iron pretreatment desulfurizing, by desulfurizing iron to 0.030%;
(3), remove the dregs in molten iron, the band quantity of slag that makes molten iron is 0.2%;
(4), molten iron thermometric and sampling, stove hot metal composition, temperature need meet the requirement of step (1), (2), and molten iron+pig is blended in converter;
(5), early stage blow vanadium, blow the oxygen operating pressure 0.7 of vanadium, oxygen-supplying amount is 11400Nm
3/ h, oxygen supply intensity 2.15m
3/ (min.t), bottom blowing nitrogen intensity 0.35m
3/ (min.t), blow the vanadium time to be controlled at 3min, the substantially oxidized slag phase that enters of vanadium, wherein molten iron point temperature is controlled between 1430 ℃;
(6), to the whipping agent and the poly-slag agent that add 40-60Kg in the molten iron of converter, gather slag, it is fixed that concrete whipping agent and poly-slag agent add-on are looked concrete the condition of production, to be that slag is rare add principle, slag is thick to be added less;
(7), vanadium slag is grilled in vanadium slag tank, takes off the vanadium slag time to complete in 2min, and then carry out vanadium extraction.
In step (2), the sulphur load≤0.070% of the molten iron after molten iron pretreatment desulfurizing, desulfurization periodic Control is in 20min.
In step (4), if molten iron does not reach requirement, molten iron is directly used in to steel-making, does not carry out vanadium extraction processing.
The method of single-stage vanadium extraction in same converter also comprises step (8): molten iron adds lime to adjust basicity to 3.5 after taking off vanadium slag.
The method of single-stage vanadium extraction in same converter also comprises step (9): the later stage is blown carbon, blows the oxygen operating pressure 0.80MPa of carbon, and oxygen-supplying amount is 16500Nm
3/ h, oxygen supply intensity 3.2Nm
3/ (min.t), bottom blowing nitrogen intensity 0.20m
3/ (min.t).
The method of single-stage vanadium extraction in same converter also comprises step (10): tapping.
The present invention has not only solved traditional duplex practice and has taken the defective workmanship of independent vanadium extraction by converter blowing, has also reduced the thermosteresis of half steel in transport process simultaneously.According to statistics, the vanadium slag temperature drop in circular flow after traditional duplex practice vanadium extraction reaches 120 ℃ more than, and by the pricing of 1.2 yuan/℃, the present invention is that 120 yuan of ton steel costs are saved in vanadium extraction steel-making.
Compared with prior art, the method of single-stage vanadium extraction in same converter provided by the invention, solve traditional converter duplex vanadium extracting method needs the defective workmanship of the independent converter refining of independent vanadium extraction by converter blowing half steel in vanadium extracting process, also solve the problem that its thermosteresis is large simultaneously, making vanadium extraction from hot metal make steel whole process carries out in same converter, when the maximum utilization that reaches vanadium resource is reclaimed, reduce the converter process energy consumption of its production process, for vanadium extraction from hot metal process for making provides the road of a low cost production.
To the above-mentioned explanation of the disclosed embodiments, make professional and technical personnel in the field can realize or use the present invention.To be apparent for those skilled in the art to the multiple modification of these embodiment, General Principle as defined herein can, in the situation that not departing from the spirit or scope of the present invention, realize in other embodiments.Therefore, the present invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Claims (7)
1. a method for single-stage vanadium extraction in same converter, is characterized in that, comprises the following steps:
(1), vanadium-bearing hot metal packs converter into, wherein the carbon content of molten iron is not less than 3.6%, content of vanadium is not less than 0.20%, molten iron temperature is between 1250 ℃～1290 ℃, silicon, manganese, titanium total content are no more than 0.90%, silicon, titanium total content are no more than 0.60%;
(2), molten iron pretreatment desulfurizing, below desulfurizing iron to 0.070%;
(3), remove the dregs in molten iron, make the band quantity of slag of molten iron be less than or equal to 0.5%;
(4), molten iron thermometric and sampling, make need meet into composition, the temperature of stove molten iron the requirement of step (1), (2);
(5), early stage blow vanadium, blow the oxygen operating pressure 0.7-0.8MPa of vanadium, oxygen-supplying amount is 11400-12000Nm
3/ h, oxygen supply intensity 2.15-2.55m
3/ (mint), bottom blowing nitrogen intensity 0.20-0.40m
3/ (mint), blow the vanadium time to be controlled at 3～6min, the substantially oxidized slag phase that enters of vanadium, wherein molten iron point temperature is controlled between 1430 ℃～1480 ℃;
(6), to the whipping agent and the poly-slag agent that add 40-60Kg in the molten iron of converter, gather slag;
(7), vanadium slag is grilled in vanadium slag tank, takes off the vanadium slag time to complete in 1min-3min, and then carry out vanadium extraction.
2. the method for single-stage vanadium extraction in same converter according to claim 1, is characterized in that, in step (1), vanadium-bearing hot metal Intake Quantity is controlled at 79.0 tons/stove～82.0 ton/stove.
3. the method for single-stage vanadium extraction in same converter according to claim 1, is characterized in that, in step (2), and the sulphur load≤0.070% of the molten iron after molten iron pretreatment desulfurizing, desulfurization periodic Control is in 20min.
4. the method for single-stage vanadium extraction in same converter according to claim 1, is characterized in that, in step (4), if molten iron does not reach requirement, molten iron is directly used in to steel-making, does not carry out vanadium extraction processing.
5. the method for single-stage vanadium extraction in same converter according to claim 1, is characterized in that, also comprises step (8): molten iron adds lime to adjust basicity to 3.5-4.5 after taking off vanadium slag.
6. the method for single-stage vanadium extraction in same converter according to claim 5, is characterized in that, also comprises step (9): the later stage is blown carbon, blows the oxygen operating pressure 0.80-0.90MPa of carbon, and oxygen-supplying amount is 16500-18500Nm
3/ h, oxygen supply intensity 3.2-4.0Nm
3/ (mint), bottom blowing nitrogen intensity 0.20-0.40m
3/ (mint).
7. the method for single-stage vanadium extraction in same converter according to claim 6, is characterized in that, also comprises step (10): tapping.
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| CN103194567A (en) * | 2013-04-26 | 2013-07-10 | 攀钢集团攀枝花钢铁研究院有限公司 | Smelting process of iron ore containing vanadium |
| CN103409595B (en) * | 2013-07-24 | 2015-02-18 | 攀钢集团攀枝花钢铁研究院有限公司 | Dephosphorization and steel-making method of vanadium-containing molten iron |
| CN104178594B (en) * | 2014-08-11 | 2016-01-20 | 攀钢集团成都钢钒有限公司 | A kind of method of converter simply connected vanadium extraction steel-making |
| CN112813223B (en) * | 2020-12-30 | 2022-10-04 | 承德建龙特殊钢有限公司 | Method for recovering vanadium slag in vanadium extraction in converter |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102127613A (en) * | 2011-02-25 | 2011-07-20 | 河北钢铁股份有限公司承德分公司 | Method for extracting vanadium through composite blowing of converter |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102127613A (en) * | 2011-02-25 | 2011-07-20 | 河北钢铁股份有限公司承德分公司 | Method for extracting vanadium through composite blowing of converter |
Non-Patent Citations (4)
| Title |
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| 万朝明等.低钒铁水提钒炼钢工艺分析.《四川冶金》.2010,第32卷(第1期),4-7、23. |
| 低钒铁水提钒炼钢工艺分析;万朝明等;《四川冶金》;20100228;第32卷(第1期);4-7、23 * |
| 玉钢提钒半钢冶炼的生产实践;王定树;《云南冶金》;20110430;第40卷(第2期);57-62 * |
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