CN102796840B - Coolant for dephosphorizing and extracting vanadium of converter, production method thereof, and method for dephosphorizing and extracting vanadium of converter - Google Patents
Coolant for dephosphorizing and extracting vanadium of converter, production method thereof, and method for dephosphorizing and extracting vanadium of converter Download PDFInfo
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- CN102796840B CN102796840B CN201210238253.3A CN201210238253A CN102796840B CN 102796840 B CN102796840 B CN 102796840B CN 201210238253 A CN201210238253 A CN 201210238253A CN 102796840 B CN102796840 B CN 102796840B
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Abstract
The invention discloses a coolant for dephosphorizing and extracting vanadium of a converter, a production method of the coolant, a method for dephosphorizing and extracting vanadium of the converter by using the coolant. The production method of the coolant for dephosphorizing and extracting vanadium of the converter comprises the following steps of: mixing sodium salt particles, oxidized iron sheet particles, bauxite fine powder and water, so that mixture can be formed; pressing the mixture into small balls by a ball press; and baking the small balls to remove moisture, so that a cold solid pellet final product can be obtained. The coolant, the production method of the coolant, and the method for dephosphorizing and extracting vanadium of the converter have the advantages that the dephosphorization and the vanadium extraction can be simultaneously realized when the vanadium is extracted in the converter; the operation is simple; the influences on the existing vanadium extracting technology and the quality of semisteel are small; the dephosphorizing efficiency is high, and the production efficiency of the vanadium extracting converter can be guaranteed. Furthermore, according to the invention, part of the dephosphorizing task of the steel converter can be forwarded to the vanadium extracting converter, so that the semisteel low-cost converter steelmaking can be realized, and the molten steel with eligible ingredients and temperature can be conveniently obtained.
Description
Technical field
The present invention relates to vanadium extraction by converter blowing technical field, more particularly, relate to a kind of converter dephosphorization vanadium extraction refrigerant and production method thereof and a kind of converter dephosphorization extraction vanadium method that uses this refrigerant.
Background technology
Conventionally, bessemerizing vanadium slag is to use more a kind of vanadium extraction from hot metal method.The molten iron of 1400 DEG C of left and right through oxygen or converting with air, makes the elemental oxygens such as vanadium change into slag in converter, and half molten steel is for steel-making, and vanadium slag is for water law vanadium extraction.
In actual production, vanadium-bearing hot metal main ingredient is except Fe, C, V, also have the elements such as Ti, Cr, Si, Mn, P, can oxidized generation oxide compound in oxidizing atmosphere, but each component at a certain temperature and the avidity of oxygen and oxide compound standard free energy are discrepant, cause each component to there is different oxidation order and oxidation rate.
In vanadium extraction converting process, oxygen first forms by reacting with Fe the first irony slag having comparative advantage with FeO, and this is the principal feature of vanadium extraction operation.After irony slag occurs from the teeth outwards, then by the effect of mass transmitting of reaction FeO, carry out the oxidizing reaction of the elements such as V, Ti, Si at slag iron interface.
The vanadium extraction of converter pyrogenic process utilizes selective oxidation principle exactly, adopts high speed pure oxygen jet in converter, vanadium-bearing hot metal to be stirred, and the vanadium in molten iron is oxidized to the stable barium oxide of high price and produces a kind of physical-chemical reaction process of vanadium slag; In reaction process, by adding refrigerant control bath temperature at C, below V conversion temp, reach the object of " going vanadium to protect carbon ".The advantage of the method is: half steel temperature is high; Can ensure to produce the steel of various kinds; The vanadium slag of producing is high containing vanadium, and the impurity such as CaO, P are few, is conducive to next step and extracts V
2o
5; Vanadium slag inclusion metallic is few; Furnace campaign improves; Vanadium oxidation ratio is high.
In addition, the half steel after vanadium extraction need to pass through follow-up process for making (for example, the steps such as dephosphorization, decarburization, alloying) conventionally, could form qualified molten steel.
Therefore, comprise that the existing Technology of the vanadium extraction of converter pyrogenic process and follow-up process for making exists the shortcoming of step complexity.
Summary of the invention
For the above-mentioned deficiency of prior art, one of object of the present invention is to provide a kind of refrigerant and production method thereof that can simultaneously realize vanadium extraction and dephosphorization in vanadium extraction by converter blowing process.In addition, another object of the present invention is to provide a kind of method that can simultaneously realize vanadium extraction and dephosphorization in vanadium extraction by converter blowing process.
An aspect of of the present present invention provides the production method of a kind of converter dephosphorization vanadium extraction refrigerant, and described production method comprises step: sodium salt particle, iron scale particle, bauxitic clay fine powder and water are mixed, form compound; Through ball press, compound is pressed into bead; Baking bead, to remove moisture, obtains cooled agglomerated pellet finished product.
In one exemplary embodiment of the present invention, in the step of described formation compound, by weight, sodium salt particle accounts for 22～28 parts, and iron scale particle accounts for 3～7 parts, and bauxitic clay fine powder accounts for 37～43 parts, and water accounts for 27～33 parts.
In one exemplary embodiment of the present invention, described sodium salt is sodium carbonate.
In one exemplary embodiment of the present invention, the temperature of described baking procedure is 250～350 DEG C.
In one exemplary embodiment of the present invention, the particle diameter of described bead is 20～30mm.
Another aspect of the present invention provides a kind of converter dephosphorization vanadium extraction refrigerant, and described refrigerant is cooled agglomerated pellet, and the composition of described refrigerant comprises by weight: the Na of 35～45 parts
2cO
3, FeO, the Fe of 20～30 parts of 20～30 parts
2o
3, the SiO of 3～5 parts
2, the Al of 3～5 parts
2o
3.
In one exemplary embodiment of the present invention, the particle diameter of described refrigerant is 20～30mm.
Another aspect of the present invention provides a kind of method of converter dephosphorization vanadium extraction, described method is used converter to blow to vanadium-bearing hot metal, to make vanadium slag and low-phosphorous half steel, and described method is also included in converting process and adds converter dephosphorization vanadium extraction refrigerant as above to carry out dephosphorization and vanadium extraction processing to vanadium-bearing hot metal in converter simultaneously.
Compared with prior art, beneficial effect of the present invention comprises: a kind of refrigerant and production method thereof that can simultaneously realize vanadium extraction and dephosphorization in vanadium extraction by converter blowing process is provided; A kind of method that can simultaneously realize vanadium extraction and dephosphorization in vanadium extraction by converter blowing process is provided; Simple to operate; Impact on existing process for extracting vanadium and half steel quality is less; Dephosphorization efficiency is high, can ensure the production efficiency of converter extracting vanadium.In addition, the present invention can move forward to converter extracting vanadium by the part dephosphorization task of steel-making converter, realizes the converter steelmaking of half steel low cost, is convenient to obtain composition, molten steel that temperature is qualified.
Embodiment
Hereinafter, describe converter dephosphorization vanadium extraction of the present invention refrigerant and production method and converter dephosphorization extraction vanadium method in detail in connection with exemplary embodiment.
Converter dephosphorization vanadium extraction according to an aspect of the present invention comprises step by the production method of refrigerant: sodium salt particle, iron scale particle, bauxitic clay fine powder and water are mixed, form compound; Through ball press, compound is pressed into bead; Baking bead, to remove moisture, obtains cooled agglomerated pellet finished product.
Here, preferably, in the step of described formation compound, by weight, sodium salt particle (for example, sodium carbonate) accounts for 22～28 parts, and iron scale particle accounts for 3～7 parts, and bauxitic clay fine powder accounts for 37～43 parts, and water accounts for 27～33 parts.But, the invention is not restricted to this, for example, sodium carbonate particle, iron scale particle, bauxitic clay fine powder can be prepared burden according to the proportioning that is different from above-mentioned scope.Because the density of iron scale, bauxitic clay is all greater than the density of sodium carbonate, therefore, the density that three mixes the cooled agglomerated pellet finished product of rear formation with any proportioning is greater than the density of sodium carbonate, thereby effectively overcomes Na
2cO
3the problem on molten iron surface can only be floated over, and then Dephosphorization and vanadium extraction can be effectively realized.
In an exemplary embodiment of refrigerant production method of the present invention, the temperature of described baking procedure can be 250～350 DEG C, and preferably, the temperature of described baking procedure is 300 DEG C.
In an exemplary embodiment of refrigerant production method of the present invention, the particle diameter of described bead is 20～30mm.
Converter dephosphorization vanadium extraction according to a further aspect of the invention comprises by weight with the composition of refrigerant: the Na of 35～45 parts
2cO
3, FeO, the Fe of 20～30 parts of 20～30 parts
2o
3, the SiO of 3～5 parts
2, the Al of 3～5 parts
2o
3, and described refrigerant can be for having pelletizing shape.In addition, preferably, the particle diameter of described refrigerant can be 20～30mm.
The method of converter dephosphorization vanadium extraction is according to a further aspect of the invention used converter to blow to vanadium-bearing hot metal, to make vanadium slag and low-phosphorous half steel, wherein, described method is included in converting process and adds converter dephosphorization vanadium extraction refrigerant as above to carry out dephosphorization and vanadium extraction processing to vanadium-bearing hot metal in converter simultaneously.In addition,, in an exemplary embodiment of converter dephosphorization extraction vanadium method of the present invention, described converter dephosphorization vanadium extraction can require (for example, phosphorus content) and temperature requirement to determine according to the composition of target half steel by the add-on of refrigerant.
In the present invention, the Na in refrigerant for converter dephosphorization vanadium extraction
2cO
3there is the feature of fusing point low (308 DEG C), thereby not only can reduce the fusing point of vanadium extraction cold-consolidated ball, and Na
2cO
3can also under low-temperature condition, there is following decomposition:
Na
2CO
3＝Na
2O+CO
2↑。
Wherein, Na
2o is strong dephosphorization material, and dephosphorizing capacity is stronger than CaO, Na
2o occurs to react as follows with the P in vanadium-bearing hot metal:
3Na
2O+2[P]+5/2O
2＝3Na
2O·P
2O
5
Using the Na as dephosphorizing agent
2cO
3while adding converter separately, due to Na
2cO
3very easily decompose, therefore, dephosphorizing agent utilization ratio is low, and due to Na
2cO
3in decomposition course, can produce a large amount of basic metal flue dust, thus not only larger on equipment impact, and the threat huge to site operation personnel's healthy formation.But converter dephosphorization vanadium extraction of the present invention can avoid adopting separately Na with refrigerant
2cO
3as dephosphorizing agent deficiency.
In addition, in converter dephosphorization vanadium extraction of the present invention, with in refrigerant, because it contains sodium carbonate, therefore, converter dephosphorization vanadium extraction of the present invention is better than the dephosphorizing agent using CaO as effective constituent with the dephosphorization effect of refrigerant.
Particularly, in one exemplary embodiment of the present invention, converter dephosphorization extraction vanadium method of the present invention can be realized by following steps:
By Na
2cO
3after (its mass percent>=97%) particle (diameter≤1mm) fully mixes with iron scale particle (diameter≤1mm), bauxitic clay fine powder (diameter≤1mm), water, become the bead of 20～30mm through ball press mechanical compaction, then bead through process furnace (for example, 300 DEG C) toast after 2 hours, remove moisture, make the cooled agglomerated pellet finished product with Dephosphorization vanadium extraction function.
Wherein, Na
2cO
3: bauxitic clay fine powder: water: iron scale particle=25: 5: 40: 30.
Iron scale is Steel Plant's common materials.For example, the main component of iron scale particle can comprise by weight percentage: FeO:40～60wt%, Fe
2o
3: 40～60wt%.
Bauxitic clay fine powder is also common materials.For example, the main component of bauxitic clay fine powder can comprise by weight percentage: SiO
2: 40～50%, Al
2o
3: 35～45%, H
2o:5～15%.
Further describe the present invention below in conjunction with concrete example.
Example 1
At 120 tons of vanadium extraction by converter blowing of certain steel mill, its molten iron Intake Quantity is 140t, in vanadium extraction by converter blowing process, adds the cooled agglomerated pellet with Dephosphorization vanadium extraction function to carry out converter Dephosphorization vanadium extraction operation.This smelts heat, and vanadium-bearing hot metal composition and blow end point half composition of steel and temperature are as shown in table 1, and vanadium-bearing hot metal, all the other compositions of pig half steel are Fe.
Table 1 vanadium-bearing hot metal composition and blow end point half composition of steel and temperature
The ratio of the cooled agglomerated pellet finished product composition with Dephosphorization vanadium extraction function used is (mass percent): Na
2cO
3: 42%; FeO:25%; Fe
2o
3: 25%; SiO
2: 4%; Al
2o
3: 4%.Cooled agglomerated pellet consumption is 12.5kg/t iron.
Blow end point, dephosphorization rate reaches 85.71%; In half steel, V content only has 0.02%, and vanadium extraction rate reaches 93.33%, and all the other compositions of half steel and temperature are all in claimed range, and converter simultaneously vanadium extraction and dephosphorization has reached good effect.
Example 2
At 120 tons of vanadium extraction by converter blowing of certain steel mill, its molten iron Intake Quantity is 145t, in vanadium extraction by converter blowing process, adds the cooled agglomerated pellet with Dephosphorization vanadium extraction function to carry out converter Dephosphorization vanadium extraction operation.This smelts heat, and vanadium-bearing hot metal composition and blow end point half composition of steel and temperature are as shown in table 2, and vanadium-bearing hot metal, all the other compositions of pig half steel are Fe.
Table 2 vanadium-bearing hot metal composition and blow end point half composition of steel and temperature
The ratio of the cooled agglomerated pellet finished product composition with Dephosphorization vanadium extraction function used is (mass percent): Na
2cO
3: 45%; FeO:20%; Fe
2o
3: 30%; SiO
2: 2%; Al
2o
3: 3%.Cooled agglomerated pellet consumption is 15kg/t iron.
Blow end point, dephosphorization rate reaches 94.44%; In half steel, V content only has 0.018%, and vanadium extraction rate reaches 95.5%, and all the other compositions of half steel and temperature are all in claimed range, and converter simultaneously vanadium extraction and dephosphorization has reached good effect.
Example 3
At 120 tons of vanadium extraction by converter blowing of certain steel mill, its molten iron Intake Quantity is 135t, in vanadium extraction by converter blowing process, adds the cooled agglomerated pellet with Dephosphorization vanadium extraction function to carry out converter Dephosphorization vanadium extraction operation.This smelts heat, and vanadium-bearing hot metal composition and blow end point half composition of steel and temperature are as shown in table 3, and vanadium-bearing hot metal, all the other compositions of pig half steel are Fe.
Table 3 vanadium-bearing hot metal composition and blow end point half composition of steel and temperature
The ratio of the cooled agglomerated pellet finished product composition with Dephosphorization vanadium extraction function used is (mass percent): Na
2cO
3: 35%; FeO:30%; Fe
2o
3: 25%; SiO
2: 5%; Al
2o
3: 5%.Cooled agglomerated pellet consumption is 11kg/t iron.
Blow end point, dephosphorization rate reaches 70%; In half steel, V content only has 0.015%, and vanadium extraction rate reaches 94%, and all the other compositions of half steel and temperature are all in claimed range, and converter simultaneously vanadium extraction and dephosphorization has reached good effect.
In sum, the present invention can provide a kind of converter Dephosphorization vanadium extraction refrigerant and production method and using method, and present method is by Na
2cO
3carry out combination with the material at high temperature with cooling power, form the refrigerant of a kind of converter energy Dephosphorization vanadium extraction, due to density, strength increase, effectively overcome Na
2cO
3can only float over the problem on molten iron surface, adopt present method both can as much as possible reduce because of Na
2cO
3the basic metal flue dust decomposing more than vanadium-bearing hot metal liquid level and produce, in the diffusion of operation site, can fully make again Na
2cO
3with mixing of vanadium-bearing hot metal, thus the raising Na of maximum possible
2cO
3dephosphorization efficiency.In addition, advantage of the present invention also comprises: effectively simple in operation, less on the impact of existing process for extracting vanadium and half steel quality, execute-in-place work left-hand seat is simple, and dephosphorization efficiency is high, can ensure the production efficiency of converter extracting vanadium.In addition, the present invention can move forward to converter extracting vanadium by the part dephosphorization task of steel-making converter, realizes the converter steelmaking of half steel low cost, is convenient to obtain composition, molten steel that temperature is qualified.
Although described the present invention in conjunction with exemplary embodiment above, those of ordinary skill in the art should be clear, in the case of not departing from the spirit and scope of claim, can carry out various amendments to above-described embodiment.
Claims (6)
1. a production method for refrigerant for converter dephosphorization vanadium extraction, is characterized in that, described production method comprises the following steps:
Sodium salt particle, iron scale particle, bauxitic clay fine powder and water are mixed, form compound, wherein, described sodium salt is sodium carbonate;
Through ball press, compound is pressed into bead;
Baking bead, to remove moisture, obtains cooled agglomerated pellet finished product,
The composition of described cooled agglomerated pellet finished product comprises by weight: the Na of 35～45 parts
2cO
3, FeO, the Fe of 20～30 parts of 20～30 parts
2o
3, the SiO of 3～5 parts
2, the Al of 3～5 parts
2o
3.
2. the production method of refrigerant for converter dephosphorization vanadium extraction according to claim 1, is characterized in that, the temperature of described baking procedure is 250～350 DEG C.
3. the production method of refrigerant for converter dephosphorization vanadium extraction according to claim 1, is characterized in that, the particle diameter of described bead is 20～30mm.
4. a converter dephosphorization vanadium extraction refrigerant, is characterized in that, described refrigerant is cooled agglomerated pellet, and the composition of described refrigerant comprises by weight: the Na of 35～45 parts
2cO
3, FeO, the Fe of 20～30 parts of 20～30 parts
2o
3, the SiO of 3～5 parts
2, the Al of 3～5 parts
2o
3.
5. converter dephosphorization vanadium extraction refrigerant according to claim 4, is characterized in that, the particle diameter of described refrigerant is 20～30mm.
6. the method for a converter dephosphorization vanadium extraction, described method is used converter to blow to vanadium-bearing hot metal, to make vanadium slag and low-phosphorous half steel, it is characterized in that, described method is included in converting process to adding according to the converter dephosphorization vanadium extraction refrigerant described in any one in claim 1 to 5 in converter carries out dephosphorization and vanadium extraction processing to vanadium-bearing hot metal simultaneously.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103194565B (en) * | 2013-04-28 | 2014-12-31 | 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 |
| CN103540711B (en) * | 2013-10-23 | 2015-04-29 | 攀钢集团攀枝花钢铁研究院有限公司 | Method for simultaneously removing sulfur and phosphorus from semi-steel |
| CN104774994B (en) * | 2015-03-31 | 2017-09-15 | 河北钢铁股份有限公司承德分公司 | A kind of method that vanadium-bearing hot metal extracts the synchronous dephosphorization of vanadic anhydride |
| CN108486454B (en) * | 2018-03-30 | 2020-05-19 | 攀钢集团攀枝花钢钒有限公司 | Smelting method of ultra-low phosphorus steel |
| CN110904346A (en) * | 2019-12-17 | 2020-03-24 | 攀枝花钢城集团有限公司 | Sodium-containing vanadium extraction coolant and preparation method and application thereof |
| CN111647706B (en) * | 2020-07-21 | 2022-01-28 | 攀钢集团攀枝花钢钒有限公司 | Converter vanadium extraction coolant and production method thereof |
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- 2012-07-11 CN CN201210238253.3A patent/CN102796840B/en not_active Expired - Fee Related
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| RU2105072C1 (en) * | 1997-04-25 | 1998-02-20 | Петренев Владимир Вениаминович | Method for production of steel naturally alloyed with vanadium in conversion of vanadium iron in oxygen steel-making converters by monoprocess with scrap consumption up to 30% |
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