CN107699780B - A method of preparing ferrovanadium nitride alloy - Google Patents
A method of preparing ferrovanadium nitride alloy Download PDFInfo
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- CN107699780B CN107699780B CN201710859074.4A CN201710859074A CN107699780B CN 107699780 B CN107699780 B CN 107699780B CN 201710859074 A CN201710859074 A CN 201710859074A CN 107699780 B CN107699780 B CN 107699780B
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C35/00—Master alloys for iron or steel
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- 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
- C22C1/051—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor
- C22C1/053—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of hard compounds
- C22C1/055—Making hard metals based on borides, carbides, nitrides, oxides or silicides; Preparation of the powder mixture used as the starting material therefor with in situ formation of hard compounds using carbon
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C29/00—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides
- C22C29/16—Alloys based on carbides, oxides, nitrides, borides, or silicides, e.g. cermets, or other metal compounds, e.g. oxynitrides, sulfides based on nitrides
Abstract
The present invention relates to a kind of method for preparing ferrovanadium nitride alloy, the methods are as follows: vanadium source, carbonaceous reducing agent and iron powder are carried out mixing, are then pressed into block material；Block material is heated and carries out carburizing reagent, 1300-1500 DEG C of progress first time nitridation reaction is then warming up in a nitrogen atmosphere, second of nitridation reaction of 1100-1300 DEG C of progress is cooled to after heat preservation, obtains ferrovanadium nitride alloy after reaction.The present invention prepares high nitrogen ferrovanadium nitride using two step nitridings, and by the adjustment to temperature and nitrogen flow, the ferrovanadium nitride that nitrogen content is 14.0-15.5wt% has been prepared；The purity for improving product effective simultaneously, reduces the content of the impurity elements such as oxygen and carbon, has obtained that specific gravity is bigger, ferrovanadium nitride product of better quality.Present invention process process is simple, and device therefor is common, and low energy consumption for ferrovanadium nitride preparation process, has a good application prospect.
Description
Technical field
The present invention relates to alloy preparation fields, and in particular to a method of prepare ferrovanadium nitride alloy.
Background technique
Nitrogen has excellent strengthening effect to the Carbonitride Precipitation in micro alloyed steel.Nitrogen pick-up has following in steel
Effect: (1) toughness and plasticity of steel can be obviously improved.(2) the heat resistanceheat resistant intensity and creep ability of steel can also be improved.(3) may be used
To change distributing alternately for vanadium.(4) creep rupture strength of steel can be improved.Currently, the method for nitriding mainly has addition to nitrogenize in steel
Vanadium iron, vanadium nitride, vanadium iron, rich nitrogen manganese iron, ferro-silicon nitride.
Ferrovanadium nitride is a kind of novel VN alloy additive, and performance is better than vanadium iron and vanadium nitride, is widely used in high-strength
Spend the products such as spiral, high-strength line-pipe steel, high-intensitive fashioned iron.Ferrovanadium nitride than great, has higher suction than vanadium nitride
Yield, have the function of higher refinement crystal grain and promote intensity, toughness, ductility etc..
The existing technology for preparing ferrovanadium nitride has very much, such as a kind of ferrovanadium nitride conjunction is disclosed in CN105483507A
Barium oxide, ferriferous oxide or iron and carbonaceous reducing agent are mixed in proportion and are pressed by gold and preparation method thereof, this method
Block is put into high temperature furnace and carries out reaction generation ferrovanadium nitride.This method pyroreaction includes high temperature carbon thermal reduction and medium temperature nitridation
React two stages.The advantages of this method is that process flow is simple, but the disadvantage is that nitrogen content is relatively low in ferrovanadium nitride.
Disclose a kind of ferrovanadium nitride and preparation method thereof in CN104046824A, this method by barium oxide, carbonaceous powder, iron powder,
Aqueous binders and nitridation promotor mix and are compacted into block material, after dry materials, under the high temperature conditions, by preheating
Stage, transition stage and nitridation sintered stage prepare ferrovanadium nitride.Although this method improves the content of nitrogen, but process flow phase
To complexity.It is disclosed in CN103436770A the invention discloses a kind of preparation process of ferrovanadium nitride, is protected with nitrogen atmosphere,
And by nitrogen clean so that pushed bat kiln closed bin inside and outside oxygen content be consistent, be successively arranged in pushed bat kiln preheating zone,
Area, cooling area and the region of cooling zone four are nitrogenized, 50 vanadium iron that granularity is 5-20mm are continuously conveyed to closed bin later, occur
Nitridation reaction obtains ferrovanadium nitride.This method equally exists the problems such as complex process and relatively low nitrogen content.
In conclusion needing to develop a kind of simple process, and the method for preparing ferrovanadium nitride alloy of nitrogen content can be improved.
Summary of the invention
In view of problems of the prior art, the present invention provides a kind of methods for preparing ferrovanadium nitride alloy, improve
Nitrogen content in ferrovanadium nitride, while the content of the impurity elements such as oxygen and carbon is reduced, improve ferrovanadium nitride specific gravity, gained nitrogen
Change nitrogen content in vanadium iron product and reaches 14.0-15.5wt%.And process flow is simple, low energy consumption for preparation process, is suitable for industry
Metaplasia produces.
To achieve this purpose, the present invention adopts the following technical scheme:
The present invention provides a kind of methods for preparing ferrovanadium nitride alloy, the described method comprises the following steps:
(1) vanadium source, carbonaceous reducing agent and iron powder are subjected to mixing, are then pressed into block material；
(2) the block material heating that step (1) obtains carburizing reagent is carried out then in a nitrogen atmosphere to be warming up to
1300-1500 DEG C of progress first time nitridation reaction is cooled to second of nitridation reaction of 1100-1300 DEG C of progress after heat preservation,
Ferrovanadium nitride alloy is obtained after reaction.
The present invention prepares high nitrogen ferrovanadium nitride using two step nitridings, passes through the adjustment to temperature and nitrogen flow, system
It is standby to have obtained the ferrovanadium nitride that nitrogen content is 14.0-15.5wt%, compared with the prior art, high nitrogen vanadium nitride prepared by the present invention
Iron nitrogen content improves 10% or so.
After first time nitridation reaction, nitrogen content is 11.2-13.8wt% in the ferrovanadium nitride that is prepared；Second
After nitridation reaction, nitrogen content has reached 14.0-15.5wt% in gained ferrovanadium nitride.
According to the present invention, based on mass percentage, the ferrovanadium nitride alloy that step (2) obtains is composed of the following components:
Vanadium 65.0-67.5%；Nitrogen 14.0-15.5%；Surplus is iron and inevitable impurity.
According to the present invention, step (1) the vanadium source is the oxide of vanadium, preferably V2O5、V2O3Or VO2In any one
Or at least two combination, further preferably V2O3；Such as it can be V2O5、V2O3Or VO2In any one, it is typical but non-
The group of restriction is combined into V2O5And V2O3；V2O5And VO2；V2O3And VO2；V2O5、V2O3And VO2。
According to the present invention, step (1) carbonaceous reducing agent be graphite, anthracite or active carbon in any one or extremely
Few two kinds of combination, preferably graphite；Such as it can be any one in graphite, anthracite or active carbon, typical but non-limit
Fixed group is combined into graphite and anthracite；Graphite and active carbon；Anthracite and active carbon；Graphite, anthracite and active carbon.
According to the present invention, raw material is ground before step (1) described mixing, the vanadium source that is obtained after grinding, carbonaceous reduction
The granularity of agent and iron powder is not more than 200 μm, preferably 100-200 μm.
According to the present invention, the additional amount of step (1) described carbonaceous reducing agent is the 10-45wt% of vanadium source additional amount, such as
Can be 10wt%, 15wt%, 20wt%, 25wt%, 30wt%, 35wt%, 40wt% or 45wt% and above-mentioned numerical value it
Between specific point value, as space is limited and for concise consideration, the present invention no longer exclusive list.
According to the present invention, the pressure in step (1) described briquetting process be 10-15MPa, such as can be 10MPa,
10.5MPa, 11MPa, 11.5MPa, 12MPa, 12.5MPa, 13MPa, 13.5MPa, 14MPa, 14.5MPa or 15MPa, Yi Jishang
The specific point value between numerical value is stated, as space is limited and for concise consideration, the present invention no longer exclusive list.
According to the present invention, the temperature of step (2) described carburizing reagent be 600-1100 DEG C, preferably 800-1000 DEG C, into
One step is preferably 850 DEG C；Such as can be 600 DEG C, 650 DEG C, 700 DEG C, 750 DEG C, 800 DEG C, 850 DEG C, 900 DEG C, 950 DEG C,
Specific point value between 1000 DEG C, 1050 DEG C or 1100 DEG C and above-mentioned numerical value, as space is limited and for concise consideration, originally
Invention no longer exclusive list.
According to the present invention, the time of step (2) described carburizing reagent be 4-8h, such as can be 4h, 4.5h, 5h, 5.5h,
Specific point value between 6h, 6.5h, 7h, 7.5h or 8h and above-mentioned numerical value, as space is limited and for concise consideration, this hair
Bright no longer exclusive list.
According to the present invention, the temperature of step (2) the first time nitridation reaction is 1300-1500 DEG C, preferably 1400 DEG C；
Such as can be 1300 DEG C, 1330 DEG C, 1350 DEG C, 1380 DEG C, 1400 DEG C, 1430 DEG C, 1450 DEG C, 1480 DEG C or 1500 DEG C, with
And the specific point value between above-mentioned numerical value, as space is limited and for concise consideration, the present invention no longer exclusive list.
According to the present invention, the time of step (2) the first time nitridation reaction be 9-13h, such as can be 9h, 9.5h,
Specific point value between 10h, 10.5h, 11h, 11.5h, 12h, 12.5h or 13h and above-mentioned numerical value, as space is limited and for
Concise consideration, the present invention no longer exclusive list.
According to the present invention, the temperature of step (2) second of nitridation reaction is 1100-1300 DEG C, preferably 1200 DEG C；
Such as can be 1100 DEG C, 1130 DEG C, 1150 DEG C, 1180 DEG C, 1200 DEG C, 1230 DEG C, 1250 DEG C, 1280 DEG C or 1300 DEG C, with
And the specific point value between above-mentioned numerical value, as space is limited and for concise consideration, the present invention no longer exclusive list.
For the present invention, the temperature of first time nitridation reaction is consistently higher than second of nitridation reaction.
According to the present invention, the time of step (2) second of nitridation reaction be 10-15h, such as can be 10h,
It is specific between 10.5h, 11h, 11.5h, 12h, 12.5h, 13h, 13.5h, 14h, 14.5h or 15h and above-mentioned numerical value
Value, as space is limited and for concise consideration, the present invention no longer exclusive list.
According to the present invention, the flow of nitrogen is 100-350m during step (2) the first time nitridation reaction3/ h, example
It such as can be 100m3/h、130m3/h、150m3/h、180m3/h、200m3/h、230m3/h、250m3/h、280m3/h、300m3/h、
330m3/ h or 350m3Specific point value between/h and above-mentioned numerical value, as space is limited and for concise consideration, the present invention is not
Exclusive list again.
According to the present invention, the flow of nitrogen is 200-400m during step (2) second of nitridation reaction3/ h, example
It such as can be 200m3/h、230m3/h、250m3/h、280m3/h、300m3/h、330m3/h、350m3/h、380m3/ h or 400m3/
Specific point value between h and above-mentioned numerical value, as space is limited and for concise consideration, the present invention no longer exclusive list.
The present invention cools down after step (2) described second of nitridation reaction, and the upper temp of cooling section is
800-1000 DEG C, preferably 800-900 DEG C, further preferably 850 DEG C；Such as it can be 800 DEG C, 830 DEG C, 850 DEG C, 880
DEG C, 900 DEG C, 930 DEG C, 950 DEG C, 980 DEG C or the specific point value between 1000 DEG C and above-mentioned numerical value, as space is limited and for
Concise consideration, the present invention no longer exclusive list.
According to the present invention, temperature of lower≤200 DEG C of cooling section, preferably≤150 DEG C.
Compared with prior art, the present invention is at least had the advantages that
(1) present invention is improved by selection nitridation reaction and the control to nitridation process temperature and ammonia flow twice
Nitrogen content in ferrovanadium nitride, nitrogen content reaches 14.0-15.5wt% in gained ferrovanadium nitride product.
(2) present invention can effectively improve the pure of product by successively carrying out nitridation reaction twice after carburizing reagent
Degree reduces the content of the impurity elements such as oxygen and carbon, obtains the ferrovanadium nitride alloy product of good quality.
(3) the ferrovanadium nitride specific gravity that the present invention is prepared is bigger, is more advantageous to the stability and accuracy of control vanadium.
(4) present invention process process is simple, and device therefor is common, and low energy consumption for ferrovanadium nitride preparation process, in micro alloyed steel
It is more applicable in production process.
Detailed description of the invention
Fig. 1 is the process flow chart that a kind of specific embodiment of the present invention provides.
The present invention is described in more detail below.But following examples is only simple example of the invention, not generation
Table or limitation the scope of the present invention, protection scope of the present invention are subject to claims.
Specific embodiment
To further illustrate the technical scheme of the present invention below with reference to the accompanying drawings and specific embodiments.
As shown in Figure 1, a kind of process flow that provides of specific embodiment of the present invention can be with are as follows: restore vanadium source, carbonaceous
It is 100-200 μm that agent and iron powder, which distinguish abrasive material to granularity, and batch mixer is then added and carries out mixing, briquet after mixing
Shape material；Under the atmosphere of nitrogen, obtained block material is heated and carries out carburizing reagent, then heats to 1300-1500 DEG C
First time nitridation reaction is carried out, second of nitridation reaction of 1100-1300 DEG C of progress is cooled to after heat preservation, after reaction
To ferrovanadium nitride alloy.
In order to better illustrate the present invention, it is easy to understand technical solution of the present invention, of the invention is typical but non-limiting
Embodiment is as follows:
Embodiment 1
(1) vanadium trioxide 95.6g, graphite 27.6g, iron powder 35g are weighed, granularity is ground to respectively and is in 100-200 μm,
Above-mentioned material is put into after being mixed in batch mixer and is put into briquet in cooked flake wrapping machine, pressure 12MPa；
(2) block material that step (1) obtains is put into pushed bat kiln after dry screening and is fired, warm-up phase temperature
Degree is 500 DEG C, time 5h, and carburizing reagent phase temperature is 900 DEG C, time 6h, then passes to nitrogen, controls nitrogen flow
For 250m3/ h is warming up to 1400 DEG C of progress first time nitridation reactions, is cooled to 1200 DEG C of progress, second of nitridation after keeping the temperature 10h
Reaction, while controlling nitrogen flow is 350m3/ h, cooling (water-cooled jacket is arranged in push plate kiln hood) obtains vanadium nitride after reacting 12h
Ferroalloy, the upper temp of cooling section are 800 DEG C, temperature of lower≤150 DEG C of cooling section.
After testing, based on mass percentage, nitrogen accounts for vanadium nitride in the ferrovanadium nitride product that the present embodiment obtains
The 14.8wt% of weight of iron, vanadium account for the 66.2wt% of ferrovanadium nitride quality.
Embodiment 2
(1) vanadium trioxide 95.6g, graphite 25.3g, iron powder 30g are weighed, granularity is ground to respectively and is in 100-200 μm,
Above-mentioned material is put into after being mixed in batch mixer and is put into briquet in cooked flake wrapping machine, pressure 13MPa；
(2) block material that step (1) obtains is put into pushed bat kiln after dry screening and is fired, warm-up phase temperature
Degree is 500 DEG C, time 5h, and carburizing reagent phase temperature is 900 DEG C, time 6h, then passes to nitrogen, controls nitrogen flow
For 250m3/ h is warming up to 1450 DEG C of progress first time nitridation reactions, is cooled to 1250 DEG C of progress, second of nitridation after keeping the temperature 11h
Reaction, while controlling nitrogen flow is 400m3/ h, cooling (water-cooled jacket is arranged in push plate kiln hood) obtains vanadium nitride after reacting 13h
Ferroalloy, the upper temp of cooling section are 800 DEG C, temperature of lower≤150 DEG C of cooling section.
After testing, based on mass percentage, nitrogen accounts for vanadium nitride in the ferrovanadium nitride product that the present embodiment obtains
The 14.5wt% of weight of iron, vanadium account for the 65.8wt% of ferrovanadium nitride quality.
Embodiment 3
(1) vanadium trioxide 95.6g, graphite 32.2g, iron powder 30g are weighed, granularity is ground to respectively and is in 100-200 μm,
Above-mentioned material is put into after being mixed in batch mixer and is put into briquet in cooked flake wrapping machine, pressure 15MPa；
(2) block material that step (1) obtains is put into pushed bat kiln after dry screening and is fired, warm-up phase temperature
Degree is 500 DEG C, time 5h, and carburizing reagent phase temperature is 850 DEG C, time 6h, then passes to nitrogen, controls nitrogen flow
For 150m3/ h is warming up to 1300 DEG C of progress first time nitridation reactions, is cooled to 1200 DEG C of progress, second of nitridation after keeping the temperature 10h
Reaction, while controlling nitrogen flow is 350m3/ h, cooling (water-cooled jacket is arranged in push plate kiln hood) obtains vanadium nitride after reacting 11h
Ferroalloy, the upper temp of cooling section are 850 DEG C, temperature of lower≤150 DEG C of cooling section.
After testing, based on mass percentage, nitrogen accounts for vanadium nitride in the ferrovanadium nitride product that the present embodiment obtains
The 14.2wt% of weight of iron, vanadium account for the 65.7wt% of ferrovanadium nitride quality.
Embodiment 4
(1) vanadium trioxide 95.6g, graphite 31.5g, iron powder 35g are weighed, granularity is ground to respectively and is in 100-200 μm,
Above-mentioned material is put into after being mixed in batch mixer and is put into briquet in cooked flake wrapping machine, pressure 12MPa；
(2) block material that step (1) obtains is put into pushed bat kiln after dry screening and is fired, warm-up phase temperature
Degree is 500 DEG C, time 5h, and carburizing reagent phase temperature is 1000 DEG C, time 4h, then passes to nitrogen, controls nitrogen stream
Amount is 200m3/ h is warming up to 1400 DEG C of progress first time nitridation reactions, is cooled to 1150 DEG C of progress, second of nitrogen after keeping the temperature 11h
Change reaction, while controlling nitrogen flow is 350m3/ h, cooling (water-cooled jacket is arranged in push plate kiln hood) is nitrogenized after reacting 15h
Vanadium iron, the upper temp of cooling section are 850 DEG C, temperature of lower≤150 DEG C of cooling section.
After testing, based on mass percentage, nitrogen accounts for vanadium nitride in the ferrovanadium nitride product that the present embodiment obtains
The 14.4wt% of weight of iron, vanadium account for the 65.4wt% of ferrovanadium nitride quality.
Embodiment 5
(1) vanadium trioxide 95.6g, graphite 27.6g, iron powder 35g are weighed, granularity is ground to respectively and is in 100-200 μm,
Above-mentioned material is put into after being mixed in batch mixer and is put into briquet in cooked flake wrapping machine, pressure 12MPa；
(2) block material that step (1) obtains is put into pushed bat kiln after dry screening and is fired, warm-up phase temperature
Degree is 500 DEG C, time 5h, and carburizing reagent phase temperature is 850 DEG C, time 7h, then passes to nitrogen, controls nitrogen flow
For 100m3/ h is warming up to 1450 DEG C of progress first time nitridation reactions, is cooled to 1200 DEG C of progress, second of nitridation after keeping the temperature 13h
Reaction, while controlling nitrogen flow is 400m3/ h, cooling (water-cooled jacket is arranged in push plate kiln hood) obtains vanadium nitride after reacting 13h
Ferroalloy, the upper temp of cooling section are 850 DEG C, temperature of lower≤150 DEG C of cooling section.
After testing, based on mass percentage, nitrogen accounts for vanadium nitride in the ferrovanadium nitride product that the present embodiment obtains
The 14.6wt% of weight of iron, vanadium account for the 66.1wt% of ferrovanadium nitride quality.
Embodiment 6
(1) vanadium trioxide 95.6g, graphite 25.3g, iron powder 35g are weighed, granularity is ground to respectively and is in 100-200 μm,
Above-mentioned material is put into after being mixed in batch mixer and is put into briquet in cooked flake wrapping machine, pressure 12MPa；
(2) block material that step (1) obtains is put into pushed bat kiln after dry screening and is fired, warm-up phase temperature
Degree is 500 DEG C, time 5h, and carburizing reagent phase temperature is 650 DEG C, time 8h, then passes to nitrogen, controls nitrogen flow
For 150m3/ h is warming up to 1500 DEG C of progress first time nitridation reactions, is cooled to 1300 DEG C of progress, second of nitridation after keeping the temperature 12h
Reaction, while controlling nitrogen flow is 300m3/ h, cooling (water-cooled jacket is arranged in push plate kiln hood) obtains vanadium nitride after reacting 12h
Ferroalloy, the upper temp of cooling section are 850 DEG C, temperature of lower≤150 DEG C of cooling section.
After testing, based on mass percentage, nitrogen accounts for vanadium nitride in the ferrovanadium nitride product that the present embodiment obtains
The 14.3wt% of weight of iron, vanadium account for the 65.9wt% of ferrovanadium nitride quality.
Comparative example 1
Compared with Example 1, in addition to directly cooling obtains ferrovanadium nitride alloy after first time nitridation reaction in step (2)
Outside, other conditions are identical with embodiment 1.(only carrying out first time nitridation reaction)
After testing, based on mass percentage, nitrogen accounts for vanadium nitride in the ferrovanadium nitride product that this comparative example obtains
The 13.6wt% of weight of iron, vanadium account for the 66.5wt% of ferrovanadium nitride quality.
Comparative example 2
Compared with Example 1, in addition to without first time nitridation reaction, i.e., directly being carried out after carburizing reagent in step (2)
1200 DEG C are warming up to, control nitrogen flow is 350m3/ h carries out second of nitridation reaction, and cooling obtains vanadium nitride after reacting 12h
Outside ferroalloy, other conditions are identical with embodiment 1.(only carrying out second of nitridation reaction)
After testing, based on mass percentage, nitrogen accounts for vanadium nitride in the ferrovanadium nitride product that this comparative example obtains
The 12.9wt% of weight of iron, vanadium account for the 66.9wt% of ferrovanadium nitride quality.
The preferred embodiment of the present invention has been described above in detail, still, during present invention is not limited to the embodiments described above
Detail within the scope of the technical concept of the present invention can be with various simple variants of the technical solution of the present invention are made, this
A little simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, can be combined in any appropriate way, in order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (19)
1. a kind of method for preparing ferrovanadium nitride alloy, which is characterized in that the described method comprises the following steps:
(1) vanadium source, carbonaceous reducing agent and iron powder are subjected to mixing, are then pressed into block material；
(2) block material that step (1) obtains is heated to 600-1100 DEG C of progress carburizing reagent, then in a nitrogen atmosphere,
It is warming up to 1300-1500 DEG C of progress first time nitridation reaction 9-13h, the flow of nitrogen is 100-350m3/ h drops after heat preservation
Temperature to second of nitridation reaction 10-15h of 1100-1300 DEG C of progress, the flow of nitrogen is 200-400m3/ h, after reaction into
Row cooling, the upper temp of cooling section are 800-1000 DEG C, and temperature of lower≤200 DEG C of cooling section obtain nitrogen after the completion of cooling
Change vanadium iron.
2. the method as described in claim 1, which is characterized in that based on mass percentage, ferrovanadium nitride that step (2) obtains
Alloy is composed of the following components: vanadium 65.0-67.5%；Nitrogen 14.0-15.5%；Surplus is iron and inevitable impurity.
3. the method as described in claim 1, which is characterized in that step (1) the vanadium source is the oxide of vanadium.
4. the method as described in claim 1, which is characterized in that step (1) the vanadium source is V2O5、V2O3Or VO2In it is any
It is a kind of or at least two combination.
5. the method as described in claim 1, which is characterized in that step (1) the vanadium source is V2O3。
6. the method as described in claim 1, which is characterized in that step (1) carbonaceous reducing agent is graphite, anthracite or work
In property charcoal any one or at least two combination.
7. the method as described in claim 1, which is characterized in that step (1) carbonaceous reducing agent is graphite.
8. the method as described in claim 1, which is characterized in that ground before step (1) described mixing to raw material, after grinding
The granularity of obtained vanadium source, carbonaceous reducing agent and iron powder is not more than 200 μm.
9. method according to claim 8, which is characterized in that vanadium source, carbonaceous reducing agent and the iron obtained after the grinding
The granularity of powder is 100-200 μm.
10. the method as described in claim 1, which is characterized in that the additional amount of step (1) described carbonaceous reducing agent is that vanadium source adds
Enter the 10-45wt% of amount.
11. the method as described in claim 1, which is characterized in that the pressure in step (1) described briquetting process is 10-
15MPa。
12. the method as described in claim 1, which is characterized in that the temperature of step (2) described carburizing reagent is 800-1000
℃。
13. the method as described in claim 1, which is characterized in that the temperature of step (2) described carburizing reagent is 850 DEG C.
14. the method as described in claim 1, which is characterized in that the time of step (2) described carburizing reagent is 4-8h.
15. the method as described in claim 1, which is characterized in that the temperature of step (2) the first time nitridation reaction is 1400
℃。
16. the method as described in claim 1, which is characterized in that the temperature of step (2) second of nitridation reaction is 1200
℃。
17. the method as described in claim 1, which is characterized in that the upper temp of cooling section is 800-900 DEG C.
18. the method as described in claim 1, which is characterized in that the upper temp of cooling section is 850 DEG C.
19. the method as described in claim 1, which is characterized in that temperature of lower≤150 DEG C of cooling section.
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| CN109855931A (en) * | 2018-12-20 | 2019-06-07 | 河钢股份有限公司 | A kind of preparation method of austenitic alloy EBSD sample |
| CN110923557A (en) * | 2019-10-30 | 2020-03-27 | 中色（宁夏）东方集团有限公司 | Preparation method of high-density nitrided ferrovanadium |
| CN113604696B (en) * | 2021-08-09 | 2022-05-10 | 宁夏中宏氮化制品有限公司 | Method for preparing silicon nitride ferrovanadium by vacuum resistance method |
| CN113930661A (en) * | 2021-08-10 | 2022-01-14 | 河钢承德钒钛新材料有限公司 | Preparation method of nitrided ferrovanadium alloy additive |
| CN113652570B (en) * | 2021-08-20 | 2022-08-05 | 湖南众鑫新材料科技股份有限公司 | Process for increasing nitrogen content of vanadium nitride iron |
| CN114873569A (en) * | 2022-06-15 | 2022-08-09 | 昆明理工大学 | Method for preparing high-quality vanadium nitride by vanadium oxide reduction nitridation under reducing atmosphere |
| CN115522092B (en) * | 2022-10-25 | 2023-10-13 | 河南昱千鑫金属科技有限公司 | Production method of high-nitrogen low-carbon vanadium-nitrogen alloy |
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| CN106834775A (en) * | 2016-11-24 | 2017-06-13 | 北京科技大学 | A kind of carbon thermal reduction and the method for Nitration synthesis ferrovanadium nitride |
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