CN101921941A - Method for producing vanadium-nitrogen alloy - Google Patents
Method for producing vanadium-nitrogen alloy Download PDFInfo
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Abstract
The invention discloses a method for producing vanadium-nitrogen alloy, which comprises the following steps of: firstly, mechanically activating a vanadium-containing compound; secondly, adding a reaction promoter, a carbon-containing compound and a binder to obtain a mixture, standing the mixture for 24h and then mechanically molding the mixture to obtain a material blank; thirdly, aging the material blank; fourthly, sintering the material blank; and finally, obtaining a finished product of the vanadium-nitrogen alloy with a vanadium content of more than or equal to 77.0 percent after the material blank undergoes a drying process, a carbonization process, a nitriding process and a cooling process, wherein the temperatures of the drying process, the carbonization process and the nitriding process are 180 to 400 DEG C, 1,500 to 1,600 DEG C, and 1,250 to 1,350 DEG C respectively, and the weight part ratio of the vanadium-containing compound to the reaction promoter to the carbon-containing compound to the binder is 70-85: 3-5: 10-25: 0.1 to 10. The method has the advantages of high quality, high appearance density, high vanadium yield, and stable product quality, smooth production process and low production cost.
Description
Technical field
The present invention relates to the preparation method of the alloy addition that a kind of Iron and Steel Production uses, relate in particular to a kind of production method of VN alloy, specifically be applicable to the production of the vanadium-containing alloy that is added when containing the vanadium steel iron material produces.
Background technology
At present, produce when containing the vanadium steel iron material, use the method for adding vanadium-containing alloy to realize usually.For the addition that reduces vanadium, the toughness and tenacity that improves iron and steel, vanadium-containing alloy preferably adds with the form of VN alloy, and therefore, Iron and Steel Production increases day by day to the demand of high-quality VN alloy.At present, though the production method of VN alloy is more, for example vacuum method, normal pressure nitriding etc., and produce the higher level that all reached, but problems such as output is lower, quality shakiness that it all exists, for the quality product that improves VN alloy, reduce production costs, be badly in need of the production method of a kind of high-quality, economic VN alloy.
The Chinese patent publication number is CN101289713A, the patent of invention that open day is on October 22nd, 2008 discloses a kind of production method of VN alloy, be with Vanadium Pentoxide in FLAKES levigate after, add iron powder, carbon dust, after mixing, makes by binding agent globe, globe is sent in the horizontal pushed bat kiln, feed nitrogen in the pushed bat kiln, and make and remain pressure-fired in the kiln, globe carries out carbonization and nitrogenizing reaction in kiln, the temperature of carburizing reagent is 1500 ℃ of 1350 –, reaction times 2 – 3.5 hours, and the temperature of nitrogenizing reaction is 1150 ℃ of 1000 –, reaction times 0.5 – 1.5 hours is cooled to gradually below 100 ℃ and comes out of the stove.Though this invention is not owing to use vacuum apparatus, can reduction equipment drops into, and the flow process that simplifies the operation enhance productivity, but it is second-rate, and especially apparent mass shows that mainly the yield of vanadium is lower, and production cost is higher, unstable product quality.
Summary of the invention
The objective of the invention is to overcome exist in the prior art second-rate, production cost is higher, the defective of unstable product quality and problem, provide a kind of quality better, the production method of the VN alloy of lower, the constant product quality of production cost.
For realizing above purpose, technical solution of the present invention is:
A kind of production method of VN alloy may further comprise the steps successively:
The first step: earlier vanadium-containing compound is adopted abrasive method to carry out mechanical activation and handle, milling time added reaction promotor, carbon compound and binding agent then and carries out batch mixing more than or equal to 1 hour, obtained qualified compound;
Second step: earlier above-mentioned compound was placed 24 hours, the compound after will placing again is mechanical-moulded to carry out ageing treatment to the coarse fodder piece then for the coarse fodder piece, is about to the coarse fodder piece and dries naturally at normal temperatures, and the treatment time was more than or equal to 48 hours;
The 3rd step: earlier the coarse fodder piece after the ageing treatment is sent into the calcining kiln from the opening for feed of VN alloy calcining kiln, simultaneously, high pure nitrogen is sent in the calcining kiln by different inlet mouths, the coarse fodder piece through coming out of the stove behind drying stage, carbonation stage, nitrogenize stage and the cooling stages, finally obtains the VN alloy finished product successively; The temperature of described drying stage is 400 ℃ of 180 –, and the temperature of carbonation stage is 1600 ℃ of 1500 –, and the temperature in nitrogenize stage is 1350 ℃ of 1250 –, cooling stages is that water-cooled is to being no more than 100 ℃, calcination time is 6 hours, and kiln inner pressure is a pressure-fired, and its pressure range is 0.1 – 0.2kg/cm
3
The concentration of volume percent of described nitrogen is 99.999%; The temperature of described carbonation stage is 1550 ℃, and the temperature in nitrogenize stage is 1300 ℃.
Big or small Wei – 180 orders after described vanadium-containing compound grinds; The weight part ratio of described vanadium-containing compound, reaction promotor, carbon compound and binding agent is: 70 – 85:3 – 5:10 – 25:0.1 – 10.
Described vanadium-containing compound is powdered Vanadium Pentoxide in FLAKES, vanadous oxide, vanadium tetraoxide, ammonium poly-vanadate, ammonium meta-vanadate, vanadium hydroxide, vanadic acid or their combination.
Described reaction promotor is iron protocarbonate powder, high-purity iron powder, fusion vanadium pentoxide powder, vanadous oxide powder, ferrovanadium dust, VN alloy powder, vanadium carbide powder or vanadium metal powder.
Described carbon compound is crystalloid Graphite Powder 99, amorphous graphite in powder, carbon black powder, wood charcoal powder, Graphite Electrodes carbon dust or their combination.
Described binding agent is water, polyvinyl alcohol, Tapioca Starch, flour or their combination, and Tapioca Starch, flour are slurry.
The heating means of described calcining kiln are resistive heating, plasma heating or high temperature nitrogen heating.
The vanadiumcontent of described VN alloy is more than or equal to 77.0%.
Compared with prior art, beneficial effect of the present invention is:
1, owing in the production method of a kind of VN alloy of the present invention vanadium-containing compound has been carried out activation treatment, improved the surface reaction activity of vanadium-containing compound, thereby be convenient to the even of subsequent reactions, carry out fully, and then the quality of raising vanadium-nitrogen alloy product, and, before mechanical-moulded, compound was placed 24 hours, the purpose of this design is to make the abundant hydration of material, the cohesive action of performance water, thereby improve the wettability of compound, be convenient to improve the intensity of follow-up coarse fodder piece, in addition, the present invention has also carried out ageing treatment to the coarse fodder piece, and this kind ageing treatment not only can allow the coarse fodder piece solidify, form certain intensity, and the apparent moisture that can impel the coarse fodder piece suitably volatilizees to improve its surface tension, help reducing the surface crack of the finished product VN alloy, improve its surface quality, thereby improve its quality product.Aforementioned three designs not only can rise to 3.2g/cm with the apparent density of VN alloy
3, the product content of vanadium mentions more than 77.0%, and product yield is higher, can reach more than 70%, in addition, can also keep advantages of higher stability, quality product all with, stable.Therefore not only quality is better, apparent density is high in the present invention, and can continuous production, output is higher, quality product all with, stablize.
2, because the temperature of not only having emphasized drying stage in the production method of a kind of VN alloy of the present invention is the temperature of 400 ℃ of 180 –, carbonation stage is that the temperature in 1600 ℃ of 1500 –, nitrogenize stage is 1350 ℃ of 1250 –, but also the control calcination time is 6 hours, kiln inner pressure is a pressure-fired, and its pressure range is 0.1 – 0.2kg/cm
3This design not only can improve the quality of product, and can guarantee that stove is stable, reduce the consumption of water, electricity, nitrogen, resistance heating element, temperature element, and shorten the production cycle greatly, reduce energy consumption, reduce production costs, in addition, the high pure nitrogen that uses in the reaction process can also prevent the product oxidation to the full extent, improves the quality of products.Therefore not only quality product is better, production efficiency is higher in the present invention, and the production cycle is short, production cost is lower.
3, because the vanadium-containing compound of being taked in the production method of a kind of VN alloy of the present invention is powdered Vanadium Pentoxide in FLAKES, vanadous oxide, vanadium tetraoxide, ammonium poly-vanadate, ammonium meta-vanadate, vanadium hydroxide, vanadic acid or their combination; Reaction promotor is iron protocarbonate powder, high-purity iron powder, fusion vanadium pentoxide powder, vanadous oxide powder, ferrovanadium dust, VN alloy powder, vanadium carbide powder or vanadium metal powder; Carbon compound is crystalloid Graphite Powder 99, amorphous graphite in powder, carbon black powder, wood charcoal powder, Graphite Electrodes carbon dust or their combination; Binding agent is water, polyvinyl alcohol, Tapioca Starch, flour or their combination, and Tapioca Starch, flour are slurry, and the weight part ratio of these four kinds of materials is 70 – 85:3 – 5:10 – 25:0.1 – 10, this shows, can guarantee that the finished product VN alloy has higher vanadium recovery rate by the selection of raw material types and consumption, carry out but also help the stable of entire reaction course, thereby keep the stable of quality product.Therefore not only quality product is better, the vanadium recovery rate is higher in the present invention, and constant product quality.
Embodiment
The present invention is further detailed explanation below in conjunction with embodiment
A kind of production method of VN alloy may further comprise the steps successively:
The first step: earlier vanadium-containing compound is adopted abrasive method to carry out mechanical activation and handle, milling time added reaction promotor, carbon compound and binding agent then and carries out batch mixing more than or equal to 1 hour, obtained qualified compound;
Second step: earlier above-mentioned compound was placed 24 hours, the compound after will placing again is mechanical-moulded to carry out ageing treatment to the coarse fodder piece then for the coarse fodder piece, is about to the coarse fodder piece and dries naturally at normal temperatures, and the treatment time was more than or equal to 48 hours;
The 3rd step: earlier the coarse fodder piece after the ageing treatment is sent into the calcining kiln from the opening for feed of VN alloy calcining kiln, simultaneously, high pure nitrogen is sent in the calcining kiln by different inlet mouths, the coarse fodder piece through coming out of the stove behind drying stage, carbonation stage, nitrogenize stage and the cooling stages, finally obtains the VN alloy finished product successively; The temperature of described drying stage is 400 ℃ of 180 –, and the temperature of carbonation stage is 1600 ℃ of 1500 –, and the temperature in nitrogenize stage is 1350 ℃ of 1250 –, cooling stages is that water-cooled is to being no more than 100 ℃, calcination time is 6 hours, and kiln inner pressure is a pressure-fired, and its pressure range is 0.1 – 0.2kg/cm
3
The concentration of volume percent of described nitrogen is 99.999%; The temperature of described carbonation stage is 1550 ℃, and the temperature in nitrogenize stage is 1300 ℃.
Big or small Wei – 180 orders after described vanadium-containing compound grinds; The weight part ratio of described vanadium-containing compound, reaction promotor, carbon compound and binding agent is: 70 – 85:3 – 5:10 – 25:0.1 – 10.
Described vanadium-containing compound is powdered Vanadium Pentoxide in FLAKES, vanadous oxide, vanadium tetraoxide, ammonium poly-vanadate, ammonium meta-vanadate, vanadium hydroxide, vanadic acid or their combination.
Described reaction promotor is iron protocarbonate powder, high-purity iron powder, fusion vanadium pentoxide powder, vanadous oxide powder, ferrovanadium dust, VN alloy powder, vanadium carbide powder or vanadium metal powder.
Described carbon compound is crystalloid Graphite Powder 99, amorphous graphite in powder, carbon black powder, wood charcoal powder, Graphite Electrodes carbon dust or their combination.
Described binding agent is water, polyvinyl alcohol, Tapioca Starch, flour or their combination, and Tapioca Starch, flour are slurry.
The heating means of described calcining kiln are resistive heating, plasma heating or high temperature nitrogen heating.
The vanadiumcontent of described VN alloy is more than or equal to 77.0%.
In the above-mentioned entire reaction course, the kiln chamber is full of nitrogen and keeps pressure-fired, and the combustible gas gas that reaction generates is discharged from exhaust outlet, enters environment after lighting.
Principle of the present invention is described as follows:
One, adopting abrasive method to carry out mechanical activation to vanadium-containing compound handles:
The levigate of raw material is in order to control the granularity of raw material in the existing production technology, and this producer rule is in order to improve the surface reaction activity of raw material, that is to say, even the granularity of the raw material that this production method is used has reached traditional technology of preparing requirement, still to take abrasive method to carry out activation treatment in this production method, this activation treatment helps subsequent reactions stablizes, carries out fully, helps the raising of VN alloy quality.
Two, compound was placed 24 hours:
The purpose of this design is in order to make the abundant hydration of compound, the cohesive action of performance water, improve the wettability of compound, thereby improve the processability of compound, improve the reactive behavior of compound, help improving the intensity of follow-up coarse fodder piece, in case it breaks stable the carrying out of being convenient to react in process of production.
Three, the coarse fodder piece is carried out ageing treatment, be about to the coarse fodder piece and dry naturally at normal temperatures, the treatment time was more than or equal to 48 hours:
The purpose one of ageing treatment is to allow the coarse fodder piece solidify, and forms certain intensity; The 2nd, impel apparent moisture suitably to volatilize, suitably improve surface tension, make it have certain surface strength, thereby reduce the surface crack of vanadium-nitrogen alloy product, improve the surface quality of vanadium-nitrogen alloy product, if do not carry out ageing treatment, then the surface crack of vanadium-nitrogen alloy product is more, color is bad, residual oxygen level height.
Four, the heating means in this production method can be resistive heating, plasma heating or high temperature nitrogen heating:
Resistive heating is simple to operate, but the temperature and the thermo-efficiency of heating have certain restriction.
The plasma heating can be controlled higher Heating temperature, can also activate nitrogen-atoms, helps the nitrogen content of stable prod.
The high temperature nitrogen heating can make the homogeneity of temperature in the material reaction process better, reduces the quality product segregation, the homogeneity of improving the quality of products.
In actual the use, the present invention is according to the suitable heating means of the different choice of product requirement.
Five, the temperature of drying stage is 400 ℃ of 180 –, and the temperature of carbonation stage is 1600 ℃ of 1500 –, and the temperature in nitrogenize stage is 1350 ℃ of 1250 –, cooling stages be water-cooled to being no more than 100 ℃:
Drying temperature is to select different concrete use temperatures according to the difference of using raw material, for example: then select 400 ℃ when using Vanadium Pentoxide in FLAKES.The exsiccant purpose is in order to deviate from the water in the coarse fodder piece, alleviates water vapour in the calcination process to the infringement of equipment and consume the carbon amount.
Carbonization temperature is controlled at about 1550 ℃, and purpose is the oxygen of deviating from the raw material, and for nitrogenize creates conditions to form fine and close product, too high temperature can increase production cost, and low excessively temperature both can cause the deoxidation quantity not sufficient, also was unfavorable for the densification of product.
Nitriding temperature is controlled at about 1300 ℃, and purpose is the nitrogen content that improves in the product.Too high temperature is unfavorable for the nitriding reaction, and the depth of penetration of low excessively temperature nitrogen is not enough.
Cooling purpose is for production operation causes and falls nitrogen oxygenation with the secondary oxidation of control product, usually must not be above 100 ℃.
Six, kiln inner pressure is a pressure-fired, and its pressure range is 0.1 – 0.2kg/cm
3:
The effect of nitrogen is as shielding gas and reactant gases; both can prevent material in reaction process not by secondary oxidation oxygenation; can reduce the dividing potential drop of reaction product again to greatest extent; can also participate in reaction as the reactant of nitrogenizing reaction; be the fundamental element that generates VN alloy, so must be full of nitrogen in the whole process of reaction.
During reaction, the atmosphere in the system is pressure-fired, only needs to get final product greater than barometric point slightly, as 0.1 – 0.2kg/cm
3, the purpose of pressure-fired is that the air of control environment oppositely enters reaction system, and the material of protective reaction system is not oxidized, and its main control parameters is flow and pressure, shows and adjusting by tensimeter and under meter.
Emphasizing that nitrogen is high pure nitrogen, is that 99.999% purpose is to bring the oxygen amount of system in order to reduce nitrogen to greatest extent as its concentration of volume percent, the oxidation of control product, and the amount of oxidation of nitrogen must not surpass 20ppm usually.
Seven, vanadium-containing compound is powdered Vanadium Pentoxide in FLAKES, vanadous oxide, vanadium tetraoxide, ammonium poly-vanadate, ammonium meta-vanadate, vanadium hydroxide, vanadic acid or their combination, big or small Wei – 180 orders after it grinds:
The effect of vanadium-containing compound is to provide v element for VN alloy, especially the most commonly used with Vanadium Pentoxide in FLAKES and vanadous oxide, wherein, from the angle of production VN alloy, relatively good with the effect that vanadous oxide is produced, vanadium metal content is best in 64% left and right sides effect.
Granularity Bing Bu Ju Xian Yu – 180 orders commonly used of vanadium-containing compound all are fine as-100 – 200 orders.
Eight, reaction promotor is iron protocarbonate powder, high-purity iron powder, fusion vanadium pentoxide powder, vanadous oxide powder, ferrovanadium dust, VN alloy powder, vanadium carbide powder or vanadium metal powder:
Reaction promotor all is the same on effect, all is for the apparent density that reduces temperature of reaction, raising product, the carrying out of strengthening nitrogenizing reaction.But the activity of non-iron substance in reaction process is quite a lot of, contains the content of vanadium that the vanadium material then can further improve product; The metal Ferrum content of high-purity iron powder requires to reach more than 98%; The VN alloy fine powder is wide material sources then, help realizing recycle; Ferrovanadium fine powder, fusion Vanadium Pentoxide in FLAKES also have similar effects.
Nine, carbon compound is crystalloid Graphite Powder 99, amorphous graphite in powder, carbon black powder, wood charcoal powder, Graphite Electrodes carbon dust or their combination:
Carbon compound all is the same on effect, all provides carbon.But in the same graphite, the better effects if of crystalloid graphite shows as that plasticity is good, reactive behavior is good.
Ten, binding agent is water, polyvinyl alcohol, Tapioca Starch, flour or their combination, and Tapioca Starch, flour are slurry:
The use form of binding agent and the kind of the vanadium-containing compound of consumption and use, apparent character, binding agent kind are relevant.The consumption of binding agent should be low as much as possible in principle.
Embodiment 1:
With quality 1000kg, the powdery Vanadium Pentoxide in FLAKES of Vanadium Pentoxide in FLAKES grade 98% adopts abrasive method to carry out mechanical activation and handles, milling time was more than or equal to 1 hour, grind all Tong Guo – 180 orders of back, adding the 10kg iron protocarbonate again is reaction promotor, the crystalloid graphite that adds 313.5kg fixed carbon content 98% is carburization agent, water 70.5kg wet mixing as binding agent is added evenly to obtain compound in the dried even back that is mixed, placing mechanical-moulded after 24 hours is the coarse fodder piece of 50 millimeters of Φ, the coarse fodder piece dries after 48 hours naturally sends into calcination processing in the calcining kiln, the temperature of drying stage is 400 ℃, the temperature of carbonation stage is 1600 ℃, the temperature in nitrogenize stage is 1350 ℃, cooling stages be water-cooled to being no more than 100 ℃, calcination time is 6 hours, kiln inner pressure is a pressure-fired, and its pressure range is 0.2kg/cm
3, cooling is come out of the stove can obtain that surface quality is good, reaction evenly, apparent density 3.2g/cm
3Vanadium-nitrogen alloy product 710kg, the product content of vanadium 77.25% by analysis, nitrogen content 15.8%, the quantity-produced day output reaches 1100kg.
Embodiment 2:
With quality 1000kg, the vanadous oxide of vanadium metal content 64.5% adopts abrasive method to carry out mechanical activation and handles, milling time was more than or equal to 1 hour, grind the back all by-180 orders, add 10kg fusion Vanadium Pentoxide in FLAKES (all by-200 orders, Vanadium Pentoxide in FLAKES grade 98%) is reaction promotor, the crystalloid graphite that adds 278kg fixed carbon content 98% is carburization agent, the wet mixing of 112kg water is added evenly to obtain compound in the dried even back that is mixed, placing mechanical-moulded after 24 hours is the coarse fodder piece of 50 millimeters of Φ, the coarse fodder piece dries after 48 hours naturally sends into calcination processing in the calcining kiln, the temperature of drying stage is 300 ℃, the temperature of carbonation stage is 1500 ℃, the temperature in nitrogenize stage is 1250 ℃, cooling stages is that water-cooled is to being no more than 100 ℃, calcination time is 6 hours, and kiln inner pressure is a pressure-fired, and its pressure range is 0.1kg/cm
3, cooling is come out of the stove can obtain that surface quality is good, reaction evenly, apparent density 3.2g/cm
3Vanadium-nitrogen alloy product 840kg, the product content of vanadium 77.50% by analysis, nitrogen content 16.2%, the quantity-produced day output reaches 1800kg.
Embodiment 3:
With quality 1000kg, the powdery vanadium tetraoxide of vanadium tetraoxide grade 98% adopts abrasive method to carry out mechanical activation and handles, milling time was more than or equal to 1 hour, grind all Tong Guo – 180 orders of back, add the 10kg high-purity iron powder again as reaction promotor, the carbon black powder that adds 320kg fixed carbon content 95% is a carburization agent, the dried even back interpolation that is mixed is starched the 80kg wet mixing evenly to obtain compound as the flour of binding agent, placing mechanical-moulded after 24 hours is the coarse fodder piece of 50 millimeters of Φ, the coarse fodder piece dries after 48 hours naturally sends into calcination processing in the calcining kiln, the temperature of drying stage is 400 ℃, the temperature of carbonation stage is 1550 ℃, the temperature in nitrogenize stage is 1300 ℃, cooling stages be water-cooled to being no more than 100 ℃, calcination time is 6 hours, kiln inner pressure is a pressure-fired, and its pressure range is 0.15kg/cm
3, cooling is come out of the stove can obtain that surface quality is good, reaction evenly, apparent density 3.2g/cm
3Vanadium-nitrogen alloy product 780kg, the product content of vanadium 77.35% by analysis, nitrogen content 16.0%.The quantity-produced day output reaches 1300kg.
Therefore not only quality is better, apparent density is high in the present invention, the yield height of vanadium, and constant product quality, smooth production process, production cost are lower.
Claims (9)
1. the production method of a VN alloy is characterized in that described production method may further comprise the steps successively:
The first step: earlier vanadium-containing compound is adopted abrasive method to carry out mechanical activation and handle, milling time added reaction promotor, carbon compound and binding agent then and carries out batch mixing more than or equal to 1 hour, obtained qualified compound;
Second step: earlier above-mentioned compound was placed 24 hours, the compound after will placing again is mechanical-moulded to carry out ageing treatment to the coarse fodder piece then for the coarse fodder piece, is about to the coarse fodder piece and dries naturally at normal temperatures, and the treatment time was more than or equal to 48 hours;
The 3rd step: earlier the coarse fodder piece after the ageing treatment is sent into the calcining kiln from the opening for feed of VN alloy calcining kiln, simultaneously, high pure nitrogen is sent in the calcining kiln by different inlet mouths, the coarse fodder piece through coming out of the stove behind drying stage, carbonation stage, nitrogenize stage and the cooling stages, finally obtains the VN alloy finished product successively; The temperature of described drying stage is 400 ℃ of 180 –, and the temperature of carbonation stage is 1600 ℃ of 1500 –, and the temperature in nitrogenize stage is 1350 ℃ of 1250 –, cooling stages is that water-cooled is to being no more than 100 ℃, calcination time is 6 hours, and kiln inner pressure is a pressure-fired, and its pressure range is 0.1 – 0.2kg/cm
3
2. the production method of a kind of VN alloy according to claim 1, it is characterized in that: the concentration of volume percent of described nitrogen is 99.999%; The temperature of described carbonation stage is 1550 ℃, and the temperature in nitrogenize stage is 1300 ℃.
3. the production method of a kind of VN alloy according to claim 1 and 2 is characterized in that: big or small Wei – 180 orders after described vanadium-containing compound grinds; The weight part ratio of described vanadium-containing compound, reaction promotor, carbon compound and binding agent is: 70 – 85:3 – 5:10 – 25:0.1 – 10.
4. the production method of a kind of VN alloy according to claim 3, it is characterized in that: described vanadium-containing compound is powdered Vanadium Pentoxide in FLAKES, vanadous oxide, vanadium tetraoxide, ammonium poly-vanadate, ammonium meta-vanadate, vanadium hydroxide, vanadic acid or their combination.
5. the production method of a kind of VN alloy according to claim 3, it is characterized in that: described reaction promotor is iron protocarbonate powder, high-purity iron powder, fusion vanadium pentoxide powder, vanadous oxide powder, ferrovanadium dust, VN alloy powder, vanadium carbide powder or vanadium metal powder.
6. the production method of a kind of VN alloy according to claim 3, it is characterized in that: described carbon compound is crystalloid Graphite Powder 99, amorphous graphite in powder, carbon black powder, wood charcoal powder, Graphite Electrodes carbon dust or their combination.
7. the production method of a kind of VN alloy according to claim 3, it is characterized in that: described binding agent is water, polyvinyl alcohol, Tapioca Starch, flour or their combination, and Tapioca Starch, flour are slurry.
8. the production method of a kind of VN alloy according to claim 3 is characterized in that: the heating means of described calcining kiln are resistive heating, plasma heating or high temperature nitrogen heating.
9. according to the production method of claim 4,5,6,7 or 8 described a kind of VN alloy, it is characterized in that: the vanadiumcontent of described VN alloy is more than or equal to 77.0%.
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| CN114231781A (en) * | 2021-11-12 | 2022-03-25 | 攀钢集团攀枝花钢铁研究院有限公司 | Preparation method of high-nitrogen vanadium-nitrogen alloy |
| CN116334466A (en) * | 2021-12-15 | 2023-06-27 | 陕西五洲矿业股份有限公司 | Processing technology for preparing vanadium-nitrogen alloy based on powdery vanadium pentoxide |
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Application publication date: 20101222 Assignee: Hubei Jing Yang Industrial Co., Ltd. Assignor: Gan Jin|Wang|Huang Qihui|Gao Xiangshan Contract record no.: 2012420000093 Denomination of invention: Production method of vanadium-nitrogen alloy Granted publication date: 20120704 License type: Exclusive License Record date: 20120725 |