CN111041260A - Preparation method of 80 ferrovanadium and 80 ferrovanadium prepared by using same - Google Patents
Preparation method of 80 ferrovanadium and 80 ferrovanadium prepared by using same Download PDFInfo
- Publication number
- CN111041260A CN111041260A CN201911338495.8A CN201911338495A CN111041260A CN 111041260 A CN111041260 A CN 111041260A CN 201911338495 A CN201911338495 A CN 201911338495A CN 111041260 A CN111041260 A CN 111041260A
- Authority
- CN
- China
- Prior art keywords
- raw material
- ferrovanadium
- vanadium
- containing raw
- iron
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/04—Making non-ferrous alloys by powder metallurgy
- C22C1/05—Mixtures of metal powder with non-metallic powder
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/10—Dry methods smelting of sulfides or formation of mattes by solid carbonaceous reducing agents
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C27/00—Alloys based on rhenium or a refractory metal not mentioned in groups C22C14/00 or C22C16/00
- C22C27/02—Alloys based on vanadium, niobium, or tantalum
- C22C27/025—Alloys based on vanadium, niobium, or tantalum alloys based on vanadium
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention relates to a preparation method of 80 ferrovanadium and 80 ferrovanadium prepared by the same. The preparation method comprises the following steps: (1) uniformly mixing a vanadium-containing raw material, a carbon-containing raw material and an iron-containing raw material; (2) and (2) putting the mixed raw material obtained in the step (1) into a pushed slab kiln filled with protective gas for carbon-thermal solid-phase reduction to obtain 80 ferrovanadium. The preparation method does not need to be vacuumized, can prepare the qualified 80 ferrovanadium in the pushed slab kiln under the protective gas environment, has the recovery rate of vanadium of more than 98 percent, has the advantages of simple flow, low production cost and easily obtained raw materials, and can realize continuous large-scale production by utilizing the common pushed slab kiln.
Description
Technical Field
The invention relates to the technical field of metallurgy, in particular to a preparation method of 80 ferrovanadium and 80 ferrovanadium prepared by the same.
Background
Ferrovanadium is a vanadium microalloyed intermediate alloy which is most widely applied in the steel industry at present, and is widely applied to the industries of mechanical manufacturing, aerospace, construction of roads and bridges and the like.
Ferrovanadium is an important alloy additive in the steel industry, mainly plays a role in refining grains, increasing the strength of steel and inhibiting the aging effect of steel, and is specifically represented as follows: in the alloy structural steel, ferrovanadium has the function of refining grains and increasing the strength and toughness of the steel; in spring steel, ferrovanadium is used in combination with chromium or manganese, so that the elastic limit of the steel is increased, and the quality of the steel is improved; in the tool steel, the ferrovanadium has the functions of refining the structure and the crystal grains of the steel, increasing the tempering stability of the steel, enhancing the secondary hardening effect of the steel, improving the wear resistance of the steel and prolonging the service life of the tool; vanadium added into cast iron promotes the formation of pearlite due to the formation of carbide, so that cementite is stable, the shape of graphite particles is fine and uniform, and the crystal grains of a matrix are refined, thereby improving the hardness, tensile strength and wear resistance of a casting.
The preparation principle of the ferrovanadium alloy is mainly that a reducing agent is used for reducing vanadium-containing oxide and other vanadium-containing raw materials, and the vanadium-containing oxide and other vanadium-containing raw materials are mutually dissolved with an iron melt in a high-temperature molten state to obtain the ferrovanadium alloy. The traditional 80 ferrovanadium smelting method comprises an aluminothermic method and a vacuum furnace smelting method. The aluminothermic process adopts a strong reducing agent aluminum, so that a large amount of heat can be generated in the process of reducing vanadium oxide, the heat requirement of the aluminothermic smelting process can be met, the reaction temperature is reduced by adding return ferrovanadium scraps, and the slag viscosity is reduced by adding lime, magnesia and fluorite, so that the smelting recovery rate of vanadium is only 90-95%. Therefore, the aluminothermic process has the disadvantages of low vanadium recovery, intermittent production and high price of the reducing agent aluminum. The vacuum furnace smelting method comprises the steps of adding water into vanadium oxide, a reducing agent and iron powder for mixing, then pressing into blocks, drying, carrying out vacuum smelting, and finally reacting to generate ferrovanadium. Although the method can adopt cheap carbon powder as a reducing agent and improve the smelting recovery rate to more than 95 percent, the method still has the defects of complex process, high production cost of a vacuum furnace, intermittent production and the like, and can not meet the continuous large-scale production requirement.
CN106244805A discloses a method for smelting FeV80 by an electro-aluminothermic process, which comprises the step of uniformly paving ferrovanadium at the bottom of a straight-tube furnaceFine powder; adding the evenly mixed smelting raw material V into the furnace2O5Electrifying aluminum powder, iron particles, lime and ferrovanadium fine powder for arc-striking smelting; after a molten pool is formed in the furnace, uniformly mixed smelting raw material V is added2O3Continuously electrifying and smelting aluminum powder, iron particles and lime; and after smelting, sequentially carrying out blowing, electrified refining, standing and cooling of the furnace body, disassembling the furnace, water quenching of the alloy cake and crushing to obtain the FeV80 alloy. The method realizes that a molten ferrovanadium alloy layer is formed at the bottom of the furnace in the smelting process, and avoids direct contact between a furnace bottom bonding layer and a smelting slag layer; meanwhile, the ferrovanadium fine powder is added into the smelting raw material containing V2O5 to absorb redundant heat, so that the purposes of reducing the MgO content in the ferrovanadium smelting slag and improving the slag system characteristics are achieved. However, the method still adopts the aluminothermic process with high energy consumption, high cost and high pollution, and has the defects of complex process, intermittent production, high production cost and the like, so that the method cannot meet the continuous large-scale production requirement.
CN103060524A discloses a process for extracting vanadium from vanadium magnetite concentrate to smelt FeV80 ferrovanadium, the process comprises the steps of mixing vanadium magnetite concentrate with NaCO3, feeding into an electric furnace, smelting molten iron and vanadium-containing dross; atomizing molten iron into iron powder, and preparing a ferric sulfate solution by sequentially adopting dilute sulfuric acid and hydrogen peroxide; leaching the vanadium-containing dross into a vanadium solution by water; introducing the ferric sulfate solution into the vanadium solution in proportion, and heating to obtain ferric vanadate precipitate; drying the ferric vanadate precipitate, adding aluminum particles and calcium oxide in proportion, and adding into an electric arc furnace for smelting to generate FeV80 ferrovanadium. The process aims at vanadium extraction of vanadium from vanadium magnetite concentrate to smelt FeV80 ferrovanadium, still adopts an aluminothermic method with high energy consumption, high cost and high pollution, has the defects of complex working procedures, limited application range, high production cost and the like, and cannot meet the continuous large-scale production requirement.
CN106854700A discloses a method for preparing a ferrovanadium alloy, which comprises the steps of preparing mixed pellets, carrying out reduction roasting to obtain metallized pellets, and continuously charging and smelting to obtain the ferrovanadium alloy. Although the method comprehensively utilizes iron in the vanadium slag to replace steel scraps to smelt the ferrovanadium, compared with the existing ferrovanadium smelting process, the method saves the comprehensive energy consumption by more than 20 percent, reduces the consumption of aluminum particles by more than 70 percent and reduces the consumption of the steel scraps by 100 percent, but still adopts an aluminothermic method with high energy consumption, high cost and high pollution, so that the application range of the preparation method is limited, and the continuous large-scale production requirement cannot be met.
CN108330303A discloses a new method for preparing medium and high vanadium iron, the preparation method comprises the steps of mixing vanadium pentoxide with vanadium trioxide, aluminum powder, aluminum wire sections, scrap iron, calcium oxide and scrap iron uniformly, putting the mixture into a smelting furnace for aluminothermic reduction reaction, then carrying out electric arc heating refining, immediately blowing aluminum powder into molten slag after stopping, carrying out electric arc heating refining again, cooling, turning over the furnace and separating to obtain a vanadium iron alloy product. Although the preparation method can improve the recovery rate of vanadium to more than 98 percent, compared with the existing electro-aluminothermic method for producing ferrovanadium alloy, the preparation method reduces the electric energy consumption, reduces splashing generated during smelting reaction, saves aluminum materials consumed by vanadium pentoxide for smelting ferrovanadium, still adopts an aluminothermic method with high energy consumption, high cost and high pollution, has the defects of complex working procedures, intermittent production, high production cost and the like, and cannot meet the continuous large-scale production requirement.
CN109722581A discloses 85-90 ferrovanadium and a preparation method thereof, the preparation method comprises the steps of adding powder vanadium oxide, carbon powder, iron oxide powder and a composite binder into a mixer, adding water into the mixer for mixing uniformly, adding the mixed raw materials into a ball press or a briquetting machine for ball pressing or briquetting, drying the wet pressed balls or briquettes in a dryer, then filling the dried pressed balls or briquettes into a vacuum resistance furnace or a vacuum intermediate frequency electric furnace, vacuumizing in a closed manner, heating, and performing carbothermic solid phase reduction, thereby producing the 85-90 ferrovanadium alloy. Although the preparation method improves the recovery rate of vanadium to 98% or above, the preparation method still has the defects of complex process, high production cost of a vacuum furnace, intermittent production and the like, and cannot meet the continuous large-scale production requirement.
Therefore, there is a need to develop a new method for preparing 80 ferrovanadium.
Disclosure of Invention
In view of the problems in the prior art, the invention provides a preparation method of 80 ferrovanadium and 80 ferrovanadium prepared by the same. The preparation method comprises the following steps: (1) uniformly mixing a vanadium-containing raw material, a carbon-containing raw material and an iron-containing raw material; (2) and (2) putting the mixed raw material obtained in the step (1) into a pushed slab kiln filled with protective gas for carbon-thermal solid-phase reduction to obtain 80 ferrovanadium. The preparation method does not need to be vacuumized, can prepare the qualified 80 ferrovanadium in the pushed slab kiln under the protective gas environment, has the recovery rate of vanadium of more than 98 percent, has the advantages of simple flow, low production cost and easily obtained raw materials, and can realize continuous large-scale production by utilizing the common pushed slab kiln.
In order to achieve the purpose, the invention adopts the following technical scheme:
one of the purposes of the invention is to provide a preparation method of 80 ferrovanadium, which comprises the following steps:
(1) uniformly mixing a vanadium-containing raw material, a carbon-containing raw material and an iron-containing raw material;
(2) and (2) putting the mixed raw material obtained in the step (1) into a pushed slab kiln filled with protective gas for carbon-thermal solid-phase reduction to obtain 80 ferrovanadium.
The preparation method provided by the invention does not adopt high-valence aluminum in an aluminothermic method as a reducing agent, does not adopt a vacuum furnace with high production cost in a vacuum furnace smelting method, and further simplifies the preparation method into two steps of uniformly mixing raw materials and carrying out carbothermic solid-phase reduction in a pushed slab kiln filled with protective gas, does not need to be vacuumized, can improve the recovery rate of vanadium to more than 98%, has the advantages of simple flow, low production cost and easiness in obtaining of raw materials, and can realize continuous large-scale production by utilizing a common pushed slab kiln.
As a preferable technical scheme of the invention, the vanadium-containing raw material, the carbon-containing raw material and the iron-containing raw material in the step (1) are proportioned according to the mass ratio of elements.
Preferably, the element mass ratio is V: c: fe 1000 (620) -300 (200) -350), such as 1000:620:250, 1000:600:280, 1000:500:200, 1000:400:300, or 1000:300:350, but is not limited to the recited values, and other non-recited values within the range are also applicable.
As a preferred technical solution of the present invention, in the step (1), the vanadium-containing raw material is any one or a mixture of at least two of vanadium dioxide, vanadium trioxide, vanadium pentoxide, ammonium metavanadate or ammonium polyvanadate, and typical but non-limiting examples of the mixture are: mixtures of vanadium dioxide and vanadium trioxide, mixtures of vanadium trioxide and vanadium pentoxide, mixtures of ammonium metavanadate and ammonium polyvanadate or mixtures of vanadium dioxide, vanadium trioxide and vanadium pentoxide, and the like.
Preferably, the vanadium-containing raw material in step (1) has a particle size of 50 to 300 mesh, such as 50 mesh, 70 mesh, 100 mesh, 120 mesh, 150 mesh, 180 mesh, 200 mesh, 230 mesh, 250 mesh, 280 mesh or 300 mesh, but not limited to the recited values, and other values not recited in the range of the values are also applicable.
As a preferred technical scheme of the invention, the carbonaceous raw material in the step (1) is any one or a mixture of at least two of graphite, coke, tar or asphalt, and typical but non-limiting examples of the mixture are as follows: a mixture of graphite and coke, a mixture of coke and tar or a mixture of tar and pitch, etc.
The invention adopts the carbon-containing raw material with low price as the reducing agent, and the carbon-containing raw material can be not only graphite or coke with high C purity, even carbon powder, but also hydrocarbon mixture tar or asphalt with lower C purity, and the like, thereby further reducing the production cost.
As a preferred technical scheme of the invention, the iron-containing raw material in the step (1) is any one or a mixture of at least two of iron, ferric oxide and ferroferric oxide, and typical but non-limiting examples of the mixture are as follows: mixtures of iron and ferric oxide, mixtures of ferric oxide and ferroferric oxide or mixtures of iron and ferroferric oxide, and the like.
Preferably, the iron-containing material of step (1) has a particle size of 50 to 300 mesh, such as 50 mesh, 70 mesh, 100 mesh, 120 mesh, 150 mesh, 180 mesh, 200 mesh, 230 mesh, 250 mesh, 280 mesh or 300 mesh, but not limited to the recited values, and other values not recited in this range are equally applicable.
As a preferred technical solution of the present invention, the shielding gas in step (2) is any one or a mixture of at least two of nitrogen, helium, neon or argon, and typical but non-limiting examples of the mixture are: a mixture of nitrogen and helium, a mixture of helium and neon, or a mixture of neon and argon, and the like.
Preferably, the pressure of the shielding gas in step (2) is 0 to 80Pa, such as 0Pa, 10Pa, 20Pa, 30Pa, 40Pa, 50Pa, 60Pa, 70Pa, or 80Pa, but is not limited to the recited values, and other values not recited within the range are equally applicable.
The pressure of the protective gas belongs to micro-positive pressure, can be consistent with the pressure of external atmospheric pressure, and can also be slightly higher than the pressure of the external atmospheric pressure, so that extra requirements on the tightness in the existing equipment can not be generated, and unnecessary waste of the protective gas can not be caused.
In a preferred embodiment of the present invention, the reaction time of the carbothermic solid phase reduction in step (2) is 6 to 70 hours, for example, 6 hours, 10 hours, 15 hours, 20 hours, 25 hours, 30 hours, 35 hours, 40 hours, 50 hours, 60 hours, or 70 hours, but is not limited to the above-mentioned values, and other values not shown in the above-mentioned range are also applicable, preferably 20 to 40 hours.
Preferably, the carbothermic solid phase reduction of step (2) is heated to 1550-.
As a preferred technical scheme of the invention, the preparation method comprises the following steps:
(1) uniformly mixing a vanadium-containing raw material with the granularity of 50-300 meshes, a carbon-containing raw material and an iron-containing raw material with the granularity of 50-300 meshes, wherein the vanadium-containing raw material, the carbon-containing raw material and the iron-containing raw material are mixed according to the mass ratio of elements V: c: fe 1000 (620) and 300 (200) and 350 (200) are proportioned;
(2) and (2) putting the mixed raw material obtained in the step (1) into a pushed slab kiln filled with protective gas for carbon thermal solid-phase reduction, wherein the pressure of the protective gas is 0-80Pa, the reaction time of the carbon thermal solid-phase reduction is 6-70h, and the mixed raw material is heated to 1550-1900 ℃ to obtain 80 ferrovanadium.
The second purpose of the invention is to provide 80 ferrovanadium prepared by the preparation method of the first purpose, wherein the 80 ferrovanadium comprises 75-82% of V and 0.1-0.3% of C by mass percent, and the balance is iron.
As a preferred technical scheme of the invention, the 80 ferrovanadium is a compact block.
Compared with the prior art, the invention has at least the following beneficial effects:
(1) the preparation method of the 80 ferrovanadium adopts the carbon-containing raw material with low price and wide source as the reducing agent, and does not adopt a vacuum furnace for reaction, thereby greatly reducing the production cost;
(2) the preparation method of the 80 ferrovanadium can improve the recovery rate of vanadium to more than 98 percent;
(3) the preparation method of the 80 ferrovanadium utilizes a common pushed slab kiln to carry out reaction, has the advantages of simple flow, low production cost and easy operation, and can realize continuous large-scale production.
Detailed Description
For the purpose of facilitating an understanding of the present invention, the present invention will now be described by way of examples. It should be understood by those skilled in the art that the examples are only for the understanding of the present invention and should not be construed as the specific limitations of the present invention.
Example 1
The embodiment provides a preparation method of 80 ferrovanadium, which comprises the following steps:
(1) uniformly mixing 1000kg of vanadium trioxide with the granularity of 180 meshes and the purity of 98%, 245kg of graphite with the purity of 98.6% and 223kg of ferroferric oxide with the granularity of 80 meshes and the purity of 95.9%;
(2) putting the mixed raw material obtained in the step (1) into a pushed slab kiln with the length of 34 meters, wherein 24 temperature zones are arranged in the pushed slab kiln, each temperature zone of 1-6 temperature zones is 1 meter long, each temperature zone of 7-16 temperature zones is 2 meters long, and each temperature zone of 17-24 temperature zones is 1 meter; introducing argon as a protective gas into the pushed slab kiln, wherein the pressure of the argon is 0Pa, namely the pressure is consistent with the pressure of the external atmospheric pressure; the temperature of the pushed slab kiln is set to be 1-8 temperature zone, which is gradually heated from 200 ℃ to 1500 ℃, 9-17 temperature zone, which is constant at 1600 ℃, and 18-24 temperature zone, which is gradually cooled from 1500 ℃ to 100 ℃; the mixed raw materials enter a temperature zone 1 from the kiln head of the pushed slab kiln, and then come out from the kiln tail of the pushed slab kiln after 50 hours to obtain 80 ferrovanadium.
The 80 ferrovanadium obtained in this example comprises 80.21% V and 0.16% C by mass, with the balance being iron and unavoidable impurities. The vanadium recovery of this example was 98.7%.
Example 2
The embodiment provides a preparation method of 80 ferrovanadium, which comprises the following steps:
(1) mixing 1000kg of vanadium pentoxide with the granularity of 300 meshes and the purity of 99.1 percent, 265kg of coke with the purity of 90.6 percent and 135kg of iron powder with the granularity of 50 meshes and the purity of 95.9 percent uniformly;
(2) putting the mixed raw material obtained in the step (1) into a pushed slab kiln with the length of 36 meters, wherein the pushed slab kiln is provided with 26 temperature zones, each temperature zone of 1-7 temperature zones is 1 meter long, each temperature zone of 8-17 temperature zones is 2 meters long, and each temperature zone of 18-26 temperature zones is 1 meter; introducing argon as a protective gas into the pushed slab kiln, wherein the pressure of the argon is 60 Pa; the temperature of the pushed slab kiln is set to be 1-8 temperature zone, which is gradually heated from 200 ℃ to 1800 ℃, 9-18 temperature zone, which is constant at 1900 ℃, and 19-26 temperature zone, which is gradually cooled from 1800 ℃ to 100 ℃; the mixed raw materials enter a temperature zone 1 from the kiln head of the pushed slab kiln and then come out from the kiln tail of the pushed slab kiln after 40 hours to obtain 80 ferrovanadium.
The 80 ferrovanadium obtained in this example comprises 82% V and 0.1% C by mass, with the balance being iron and unavoidable impurities. The vanadium recovery of this example was 98.5%.
Example 3
The embodiment provides a preparation method of 80 ferrovanadium, which comprises the following steps:
(1) mixing 1000kg of vanadium dioxide with the granularity of 300 meshes and the purity of 98.7 percent, 245kg of carbon powder with the purity of 99.1 percent and 214kg of ferric oxide with the granularity of 100 meshes and the purity of 96.7 percent uniformly;
(2) putting the mixed raw material obtained in the step (1) into a pushed slab kiln with the length of 42 meters, wherein the pushed slab kiln is provided with 29 temperature zones, each temperature zone of 1-7 temperature zones is 1 meter long, each temperature zone of 8-20 temperature zones is 2 meters long, and each temperature zone of 21-29 temperature zones is 1 meter; introducing argon as a protective gas into the pushed slab kiln, wherein the nitrogen pressure is 80 Pa; the temperature of the pushed slab kiln is set to be 1-11 temperature zone, which is gradually heated from 200 ℃ to 1600 ℃, 12-21 temperature zone, which is constant at 1700 ℃, and 22-29 temperature zone, which is gradually cooled from 1600 ℃ to 100 ℃; the mixed raw materials enter a temperature zone 1 from the kiln head of the pushed slab kiln and then come out from the kiln tail of the pushed slab kiln after 18 hours to obtain 80 ferrovanadium.
The 80 ferrovanadium obtained in this example comprises 78.9% V and 0.22% C by mass, with the balance being iron and unavoidable impurities. The vanadium recovery of this example was 98.2%.
Example 4
(1) Mixing 1000kg of vanadium pentoxide with the granularity of 100 meshes and the purity of 98.2 percent, 265kg of carbon powder with the purity of 99.2 percent and 178kg of iron powder with the granularity of 200 meshes and the purity of 97.8 percent uniformly;
(2) putting the mixed raw material obtained in the step (1) into a pushed slab kiln with the length of 46 meters, wherein 32 temperature zones are arranged in the pushed slab kiln, each temperature zone of 1-7 temperature zones is 1 meter long, each temperature zone of 8-21 temperature zones is 2 meters long, and each temperature zone of 22-32 temperature zones is 1 meter; introducing nitrogen as protective gas into the pushed slab kiln, wherein the pressure of the nitrogen is 20 Pa; the temperature of the pushed slab kiln is set to be 1-13 temperature zone, which is gradually heated from 300 ℃ to 1700 ℃, 14-21 temperature zone, which is constant at 1800 ℃, and 22-32 temperature zone, which is gradually cooled from 1700 ℃ to 100 ℃; the mixed raw materials enter a temperature zone 1 from the kiln head of the pushed slab kiln and then come out from the kiln tail of the pushed slab kiln after 24 hours, so as to obtain 80 ferrovanadium.
The 80 ferrovanadium obtained in this example comprises, in mass%, 75% V and 0.3% C, with the balance being iron and unavoidable impurities. The vanadium recovery of this example was 98.9%.
Example 5
The embodiment provides a preparation method of 80 ferrovanadium, which comprises the following steps:
(1) uniformly mixing 1000kg of vanadium trioxide with the granularity of 200 meshes and the purity of 99%, 242kg of graphite with the purity of 95.7% and 155kg of iron powder with the granularity of 300 meshes and the purity of 96.2%;
(2) putting the mixed raw material obtained in the step (1) into a pushed slab kiln with the length of 46 meters, wherein 32 temperature zones are arranged in the pushed slab kiln, each temperature zone of 1-7 temperature zones is 1 meter long, each temperature zone of 8-21 temperature zones is 2 meters long, and each temperature zone of 22-32 temperature zones is 1 meter; introducing argon as a protective gas into the pushed slab kiln, wherein the pressure of the argon is 80 Pa; the temperature of the pushed slab kiln is set to be 1-13 temperature zone, which is gradually heated from 200 ℃ to 1500 ℃, 14-21 temperature zone, which is constant at 1550 ℃, and 22-32 temperature zone, which is gradually cooled from 1500 ℃ to 80 ℃; and the mixed raw material enters a temperature zone 1 from the kiln head of the pushed slab kiln, and then comes out from the kiln tail of the pushed slab kiln after 15 hours to obtain the 80 ferrovanadium.
The 80 ferrovanadium obtained in this example comprises, in mass%, 80.4% V and 2.2% C, with the balance being iron and unavoidable impurities. The vanadium recovery of this example was 99.1%.
The embodiment shows that the preparation method can prepare qualified 80 ferrovanadium in the pushed slab kiln under the protective gas environment without vacuumizing, the recovery rate of vanadium is up to more than 98 percent, and the method has the advantages of simple flow, low production cost and easily obtained raw materials and can realize continuous large-scale production by utilizing the common pushed slab kiln.
The applicant states that the present invention is illustrated by the above examples to show the detailed process equipment and process flow of the present invention, but the present invention is not limited to the above detailed process equipment and process flow, i.e. it does not mean that the present invention must rely on the above detailed process equipment and process flow to be implemented. It should be understood by those skilled in the art that any modification of the present invention, equivalent substitutions of the raw materials of the product of the present invention, addition of auxiliary components, selection of specific modes, etc., are within the scope and disclosure of the present invention.
Claims (10)
1. The preparation method of 80 ferrovanadium is characterized by comprising the following steps:
(1) uniformly mixing a vanadium-containing raw material, a carbon-containing raw material and an iron-containing raw material;
(2) and (2) putting the mixed raw material obtained in the step (1) into a pushed slab kiln filled with protective gas for carbon-thermal solid-phase reduction to obtain 80 ferrovanadium.
2. The preparation method according to claim 1, wherein the vanadium-containing raw material, the carbon-containing raw material and the iron-containing raw material in the step (1) are proportioned according to the mass ratio of elements;
preferably, the element mass ratio is V: c: fe 1000 (620-.
3. The preparation method according to claim 1 or 2, wherein the vanadium-containing raw material in step (1) is any one or a mixture of at least two of vanadium dioxide, vanadium trioxide, vanadium pentoxide, ammonium metavanadate or ammonium polyvanadate;
preferably, the vanadium-containing raw material in the step (1) has a particle size of 50-300 meshes.
4. The method according to any one of claims 1 to 3, wherein the carbonaceous raw material in step (1) is any one or a mixture of at least two of graphite, coke, tar and pitch.
5. The preparation method according to any one of claims 1 to 4, wherein the iron-containing raw material in the step (1) is any one of iron, ferric oxide and ferroferric oxide or a mixture of at least two of the iron, the ferric oxide and the ferroferric oxide;
preferably, the iron-containing raw material of step (1) has a particle size of 50-300 mesh.
6. The production method according to any one of claims 1 to 5, wherein the shielding gas in step (2) is any one or a mixture of at least two of nitrogen, helium, neon or argon;
preferably, the pressure of the protective gas in the step (2) is 0-80 Pa.
7. The process according to any one of claims 1 to 6, wherein the carbothermic solid phase reduction of step (2) is carried out for a reaction time of 6 to 70 hours, preferably 20 to 40 hours;
preferably, the carbothermic solid phase reduction of step (2) is heated to 1550-.
8. The production method according to any one of claims 1 to 7, characterized by comprising the steps of:
(1) uniformly mixing a vanadium-containing raw material with the granularity of 50-300 meshes, a carbon-containing raw material and an iron-containing raw material with the granularity of 50-300 meshes, wherein the vanadium-containing raw material, the carbon-containing raw material and the iron-containing raw material are mixed according to the mass ratio of elements V: c: fe 1000 (620) and 300 (200) and 350 (200) are proportioned;
(2) and (2) putting the mixed raw material obtained in the step (1) into a pushed slab kiln filled with protective gas for carbon thermal solid-phase reduction, wherein the pressure of the protective gas is 0-80Pa, the reaction time of the carbon thermal solid-phase reduction is 6-70h, and the mixed raw material is heated to 1550-1900 ℃ to obtain 80 ferrovanadium.
9. An 80 ferrovanadium which is produced by the production method according to any one of claims 1 to 8, wherein the 80 ferrovanadium comprises 75 to 82% V and 0.1 to 0.3% C in terms of mass percentage, and the balance is iron.
10. The 80 ferrovanadium according to claim 9 wherein the 80 ferrovanadium is a dense cake.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911338495.8A CN111041260A (en) | 2019-12-23 | 2019-12-23 | Preparation method of 80 ferrovanadium and 80 ferrovanadium prepared by using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911338495.8A CN111041260A (en) | 2019-12-23 | 2019-12-23 | Preparation method of 80 ferrovanadium and 80 ferrovanadium prepared by using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111041260A true CN111041260A (en) | 2020-04-21 |
Family
ID=70238604
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911338495.8A Pending CN111041260A (en) | 2019-12-23 | 2019-12-23 | Preparation method of 80 ferrovanadium and 80 ferrovanadium prepared by using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111041260A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113151730A (en) * | 2021-04-25 | 2021-07-23 | 攀钢集团北海特种铁合金有限公司 | External smelting method of ferrovanadium |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1847432A (en) * | 2005-04-12 | 2006-10-18 | 陈东红 | Sintered ferrovanadium alloy and its prepn process |
| CN105483507A (en) * | 2016-01-05 | 2016-04-13 | 北京科技大学 | Nitrided ferrovanadium alloy and preparing method thereof |
| CN106381384A (en) * | 2016-09-26 | 2017-02-08 | 河钢股份有限公司承德分公司 | Method for preparing ferrovanadium through vacuum reduction |
| CN109722581A (en) * | 2017-10-30 | 2019-05-07 | 承德锦科科技股份有限公司 | 85-90 vanadium iron and preparation method thereof |
-
2019
- 2019-12-23 CN CN201911338495.8A patent/CN111041260A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1847432A (en) * | 2005-04-12 | 2006-10-18 | 陈东红 | Sintered ferrovanadium alloy and its prepn process |
| CN105483507A (en) * | 2016-01-05 | 2016-04-13 | 北京科技大学 | Nitrided ferrovanadium alloy and preparing method thereof |
| CN106381384A (en) * | 2016-09-26 | 2017-02-08 | 河钢股份有限公司承德分公司 | Method for preparing ferrovanadium through vacuum reduction |
| CN109722581A (en) * | 2017-10-30 | 2019-05-07 | 承德锦科科技股份有限公司 | 85-90 vanadium iron and preparation method thereof |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113151730A (en) * | 2021-04-25 | 2021-07-23 | 攀钢集团北海特种铁合金有限公司 | External smelting method of ferrovanadium |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100469932C (en) | V2O5 direct alloying steelmaking technology | |
| CN102337408B (en) | Two-step reduction method for recycling stainless steel scales | |
| CN104726715A (en) | Recycling method for vanadium-chromium waste residues | |
| CN103343291B (en) | Method for producing phosphorus weathering resistant steel from limonitic laterite ore | |
| CN113265577A (en) | Method for preparing FeV50 alloy from waste iron materials in vanadium extraction from vanadium slag | |
| CN110079665B (en) | Preparation method of high-carbon metallized pellets for electric furnace | |
| CN103643056B (en) | The smelting process of low carbon ferromanganese | |
| CN111041260A (en) | Preparation method of 80 ferrovanadium and 80 ferrovanadium prepared by using same | |
| CN102559996A (en) | New silicon-aluminum-barium-calcium multicomponent deoxidation alloy for steelmaking and preparation technology thereof | |
| CN105039626A (en) | Vanadium slag preparation method | |
| CN110964962A (en) | Preparation method of 50 ferrovanadium and 50 ferrovanadium prepared by using same | |
| CN106467935A (en) | A kind of copper ashes and the Application way of carbide slag | |
| CN106467936B (en) | A kind of preparation method of Silcaz | |
| CN113481342B (en) | Method for preparing iron and separating vanadium and titanium from vanadium titano-magnetite through calcium-free low-temperature reduction | |
| CN102876832A (en) | Process for performing converter alloying vanadium increase by sheeted V2O5 | |
| CN103964510A (en) | Method for producing calcium ferrite by iron-electrode electric smelting of iron ore | |
| CN103667833A (en) | Method for producing low-carbon ferromanganese by utilizing high-carbon ferromanganese | |
| US1428061A (en) | Manufacture of iron and steel | |
| CN115404340B (en) | Method for producing cold consolidated pellets by using coking dust removal ash | |
| CN103146871B (en) | Graphitized carbon temperature raising agent and its preparation method | |
| CN103643057B (en) | The smelting process of mid-carbon fe-mn | |
| CN111334703B (en) | Production method of low-titanium-phosphorus iron alloy | |
| CN105296837A (en) | Production technology of copper-containing steel | |
| CN118222822A (en) | Short-flow process for preparing steel by vanadium-titanium-iron concentrate coal blending cold briquetting coal-based hydrogen metallurgy rotary kiln | |
| CN105274419A (en) | Technique for producing steel containing nickel |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200421 |
|
| RJ01 | Rejection of invention patent application after publication |