CN113122796A - Ferrovanadium continuous nitriding device and process thereof - Google Patents
Ferrovanadium continuous nitriding device and process thereof Download PDFInfo
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- CN113122796A CN113122796A CN202110528562.3A CN202110528562A CN113122796A CN 113122796 A CN113122796 A CN 113122796A CN 202110528562 A CN202110528562 A CN 202110528562A CN 113122796 A CN113122796 A CN 113122796A
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- 238000005121 nitriding Methods 0.000 title claims abstract description 46
- PNXOJQQRXBVKEX-UHFFFAOYSA-N iron vanadium Chemical compound [V].[Fe] PNXOJQQRXBVKEX-UHFFFAOYSA-N 0.000 title claims abstract description 31
- 229910000628 Ferrovanadium Inorganic materials 0.000 title claims abstract description 26
- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000000463 material Substances 0.000 claims abstract description 91
- 238000007599 discharging Methods 0.000 claims abstract description 19
- 238000010583 slow cooling Methods 0.000 claims description 21
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 21
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- 239000007789 gas Substances 0.000 claims description 17
- 230000007704 transition Effects 0.000 claims description 16
- 238000001816 cooling Methods 0.000 claims description 14
- 238000010438 heat treatment Methods 0.000 claims description 13
- 238000006243 chemical reaction Methods 0.000 claims description 11
- 239000000498 cooling water Substances 0.000 claims description 11
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 claims description 10
- 239000002912 waste gas Substances 0.000 claims description 10
- 229910001873 dinitrogen Inorganic materials 0.000 claims description 8
- 238000009413 insulation Methods 0.000 claims description 7
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 6
- XHCLAFWTIXFWPH-UHFFFAOYSA-N [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] Chemical compound [O-2].[O-2].[O-2].[O-2].[O-2].[V+5].[V+5] XHCLAFWTIXFWPH-UHFFFAOYSA-N 0.000 claims description 5
- 210000000078 claw Anatomy 0.000 claims description 5
- -1 ferrovanadium nitride Chemical class 0.000 claims description 5
- 229910001935 vanadium oxide Inorganic materials 0.000 claims description 5
- 229910052799 carbon Inorganic materials 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 3
- 238000003825 pressing Methods 0.000 claims description 3
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 6
- SKKMWRVAJNPLFY-UHFFFAOYSA-N azanylidynevanadium Chemical compound [V]#N SKKMWRVAJNPLFY-UHFFFAOYSA-N 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 229910052742 iron Inorganic materials 0.000 description 3
- 125000004433 nitrogen atom Chemical group N* 0.000 description 3
- 239000000047 product Substances 0.000 description 3
- 239000002344 surface layer Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 229910045601 alloy Inorganic materials 0.000 description 2
- 239000000956 alloy Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000013067 intermediate product Substances 0.000 description 2
- 229910001337 iron nitride Inorganic materials 0.000 description 2
- 239000010410 layer Substances 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 150000004767 nitrides Chemical class 0.000 description 2
- 238000002360 preparation method Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- INZDTEICWPZYJM-UHFFFAOYSA-N 1-(chloromethyl)-4-[4-(chloromethyl)phenyl]benzene Chemical compound C1=CC(CCl)=CC=C1C1=CC=C(CCl)C=C1 INZDTEICWPZYJM-UHFFFAOYSA-N 0.000 description 1
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 1
- 229910001199 N alloy Inorganic materials 0.000 description 1
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 229910001315 Tool steel Inorganic materials 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- SJKRCWUQJZIWQB-UHFFFAOYSA-N azane;chromium Chemical compound N.[Cr] SJKRCWUQJZIWQB-UHFFFAOYSA-N 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 229910002091 carbon monoxide Inorganic materials 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- PMHQVHHXPFUNSP-UHFFFAOYSA-M copper(1+);methylsulfanylmethane;bromide Chemical compound Br[Cu].CSC PMHQVHHXPFUNSP-UHFFFAOYSA-M 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000004927 fusion Effects 0.000 description 1
- BMOFLINJXRPQCY-UHFFFAOYSA-N gold vanadium Chemical compound [V].[Au] BMOFLINJXRPQCY-UHFFFAOYSA-N 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000002156 mixing Methods 0.000 description 1
- 239000012466 permeate Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C8/00—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C8/06—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases
- C23C8/08—Solid state diffusion of only non-metal elements into metallic material surfaces; Chemical surface treatment of metallic material by reaction of the surface with a reactive gas, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals using gases only one element being applied
- C23C8/24—Nitriding
- C23C8/26—Nitriding of ferrous surfaces
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C33/00—Making ferrous alloys
- C22C33/02—Making ferrous alloys by powder metallurgy
- C22C33/0235—Starting from compounds, e.g. oxides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/001—Ferrous alloys, e.g. steel alloys containing N
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/12—Ferrous alloys, e.g. steel alloys containing tungsten, tantalum, molybdenum, vanadium, or niobium
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Solid-Phase Diffusion Into Metallic Material Surfaces (AREA)
Abstract
The invention discloses a ferrovanadium continuous nitriding device and a process thereof, wherein the device comprises a gas tank, a feeding table, a supporting table between materials and a discharging table which are horizontally arranged in sequence; a first air cylinder is horizontally arranged on the feeding table, one end of the first air cylinder is connected with the air tank through a connecting channel, a vertically arranged push plate is installed at the tail end of a push rod at the other end of the first air cylinder, a plurality of feeding plates are sequentially arranged in parallel at one end of the push plate, which is far away from the first air cylinder, and the feeding plates are used for placing material blocks; the material room supporting table is fixedly provided with a material room with two open ends, and a nitriding interval is arranged in the material room. The ferrovanadium continuous nitriding process based on the device can automatically feed and preheat materials, can continuously prepare materials, shortens preheating time, and realizes automatic control of the whole nitriding device.
Description
Technical Field
The invention relates to the technical field of nitriding, in particular to a ferrovanadium continuous nitriding device and a ferrovanadium continuous nitriding process.
Background
As the equipment manufacturing industry in China is rapidly developed, the requirements on nitriding of some parts are more accurate, and particularly the requirements on high-precision transmission parts are higher, so that the equipment is expensive, the maintenance and service are difficult, the processing cost and the maintenance cost are high, and the nitriding equipment has a large market in China.
The nitriding technology is a chemical heat treatment process for enabling nitrogen atoms to permeate into the surface layer of a workpiece in a certain medium at a certain temperature. Liquid nitriding, gas nitriding, ion nitriding are common. In the traditional gas nitriding process, a workpiece is placed in a sealed container, flowing ammonia gas is introduced and heated, after the heat preservation is carried out for a long time, the ammonia gas is thermally decomposed to generate active nitrogen atoms, the active nitrogen atoms are continuously adsorbed to the surface of the workpiece and are diffused and permeated into the surface layer of the workpiece, so that the chemical components and the structure of the surface layer are changed, and the excellent surface performance is obtained. The principle is that nitrogen permeating into steel forms iron nitride with different nitrogen contents with iron from the surface to the inside, and forms various alloy nitrides, especially aluminum nitride and chromium nitride, by combining with alloy elements in steel. These nitrides have high hardness, thermal stability and high dispersivity, so that the nitrided steel parts can obtain high surface hardness, wear resistance, fatigue strength, seizure resistance, atmospheric and superheated steam corrosion resistance and temper softening resistance, and the notch sensitivity is reduced, and the size of the parts is not influenced basically.
The ferrovanadium nitride is a novel vanadium-nitrogen alloy additive, has performance superior to that of ferrovanadium and vanadium nitride, and can be widely applied to products such as high-strength screw reinforcing steel bars, high-strength pipeline steel, high-strength section steel (H-shaped steel, I-shaped steel, channel steel and angle steel), sheet billet continuous casting and rolling high-strength steel belts, non-quenched and tempered steel, high-speed tool steel and the like. However, when the ferrovanadium nitride is prepared at present, the process steps are independently carried out, and continuous preparation cannot be realized, so that the process manufacturing period is longer, and the efficiency is low.
Disclosure of Invention
The invention aims to provide a ferrovanadium continuous nitriding device and a process thereof, which are used for solving the problems in the prior art, can automatically feed and preheat materials, can continuously prepare materials, shorten preheating time and realize automatic control of the whole nitriding device.
In order to achieve the purpose, the invention provides the following scheme:
the invention provides a ferrovanadium continuous nitriding device which comprises a gas tank, a feeding table, a material room supporting table and a discharging table which are sequentially and horizontally arranged; a first air cylinder is horizontally arranged on the feeding table, one end of the first air cylinder is connected with the air tank through a connecting channel, a switch valve is arranged on the connecting channel and can control the size of a switch and the flow, a vertically arranged push plate is arranged at the tail end of a push rod at the other end of the first air cylinder, a plurality of feeding plates are sequentially arranged in parallel at one end of the push plate, which is far away from the first air cylinder, and the feeding plates are used for placing material blocks; the material room supporting table is fixedly provided with a material room with two open ends, and a nitriding interval is arranged in the material room.
Optionally, the nitriding interval in the material room comprises a preheating area, a transition area, a high-temperature slow cooling area, a low-temperature slow cooling area and a water cooling area which are sequentially arranged; the temperature of the preheating zone is 400-900 ℃, the temperature of the transition zone is 1100-1250 ℃, the temperature of the high-temperature zone is 1550-1600 ℃ all the time, and the temperature of the high-temperature slow cooling zone is reduced from 1250 ℃ to 1100 ℃.
Optionally, a first heating assembly is wound outside the preheating zone, a heat insulation plate is wrapped outside the transition zone, a second heating assembly is wound outside the high-temperature zone, a cooling water jacket is wrapped outside the water-cooling zone, a water inlet is formed in the top of the cooling water jacket, and a water outlet is formed in the bottom of the cooling water jacket.
Optionally, a plurality of nitrogen gas inlet channels are evenly arranged on one side of the material room, and a plurality of waste gas collecting pipelines are evenly arranged on the other side of the material room.
Optionally, the discharging table is of a stepped structure, the height of one end, far away from the material space, of the discharging table is smaller than the height of one end, close to the material space, of the discharging table, and the tail end of the discharging table is lower and can be used for stacking the feeding plate.
Optionally, a gripper is arranged above the discharge table, an inductor is installed at the bottom of the discharge table, and the inductor is electrically connected with the control end of the gripper. When the workpiece is pushed onto the inductor, the mechanical claw starts to work to grab the workpiece, and the workpiece can be separated from the material containing table.
Optionally, the feeding plates are of a net structure, and 19 material blocks can be placed on one feeding plate.
Optionally, furnace doors are arranged at openings at two ends of the material room, second air cylinders which are vertically arranged are mounted on two sides of the bottom of each furnace door, each second air cylinder is connected with a gas tank through an inflation channel, a switch valve is arranged on each inflation channel and can adjust the gas flow, the top of a support push rod of each second air cylinder is connected with the bottom of each furnace door, and a pressure sensor is arranged in a rod cabin of each second air cylinder; the furnace door is characterized in that cross beams are fixedly arranged above openings at two ends of the material room, bearings are mounted on the cross beams, chains are wound in the bearings, and the tail ends of the chains are fixedly connected with the bottom of the furnace door. During operation, along with the increase of the air pressure in the second cylinder, the supporting push rod of the second cylinder is pushed out, the supporting push rod of the second cylinder supports the furnace door to be opened, when the supporting push rod of the second cylinder is pushed to the top end, the pressure sensor of the rod cabin of the second cylinder senses a certain concentration, the vent valve of the second cylinder is opened, the pressure of the second cylinder is reduced, the supporting push rod falls back, and the furnace door falls.
The invention also provides a ferrovanadium continuous nitriding process, which comprises the following steps:
firstly, pressing powder mixed with vanadium oxide, iron oxide and carbon into blocks, and placing the blocks on a feeding plate;
pushing the materials into a material room through a first air cylinder, sequentially passing the materials which enter firstly through a preheating zone, a transition zone, a high-temperature slow cooling zone, a low-temperature slow cooling zone and a water cooling zone along with the continuous pushing of the subsequent materials, simultaneously opening a vent hole to introduce nitrogen, opening an exhaust port to remove waste gas in the reaction process, and starting the reaction;
and step three, after the steps are completed, the furnace door at the tail end of the material room is opened, the first air cylinder continuously delivers the material plates and the materials to the material room, the material plates which complete the process firstly are pushed by the material plates behind to reach the position of the material discharging table, then the continuous nitridation product ferrovanadium nitride is taken out, and the feeding plate is recycled for reuse.
Compared with the prior art, the invention has the following technical effects:
the invention can realize the step continuity of the preparation process, can realize the reaction continuity, liberates labor force and improves the production efficiency. The temperature zone design of the ferrovanadium continuous nitriding device can meet the requirement on temperature control, shorten the preheating and reaction time and save the time cost. The automatic feeding design of the ferrovanadium continuous nitriding device can complete the continuous feeding of materials and realize automatic control.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a ferrovanadium continuous nitriding apparatus according to the present invention;
FIG. 2 is a material temperature region structure of the ferrovanadium continuous nitriding apparatus of the present invention;
FIG. 3 is a schematic view of the present invention showing the placement of materials;
FIG. 4 is a schematic view of the structure of the oven door of the present invention;
in the figure: the continuous vanadium iron nitriding device comprises a vanadium iron continuous nitriding device 100, a gas tank 1, a first air cylinder 2, a feeding table 3, a push rod 4, a material space supporting table 5, a nitrogen gas inlet channel 6, a waste gas collecting channel 7, a water outlet 8, a cooling water jacket 9, a discharging table 10, a furnace door 11, a first heating assembly 12, a heat insulation plate 13, a second heating assembly 14, a heat insulation assembly 15, a water inlet 16, a gripper 17, a material space 18, a feeding plate 19, a supporting push rod 20, a chain 21, a furnace door 22, a cross beam 23, a bearing 24, a second air cylinder 25, an inflation channel 26, a preheating zone 27, a transition zone 28, a high-temperature zone 29, a high-temperature slow cooling zone 30, a low-temperature slow cooling zone 31, a water cooling zone.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The invention aims to provide a ferrovanadium continuous nitriding device and a process thereof, which are used for solving the problems in the prior art, can automatically feed and preheat materials, can continuously prepare materials, shorten preheating time and realize automatic control of the whole nitriding device.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Pressing the powder mixed with vanadium oxide, iron oxide and carbon into blocks, introducing nitrogen gas, and mixingThe reaction is carried out at a certain temperature, and CO is generated in the reaction process2The intermediate products such as CO, VC, VN and the like continue to be used as reactants to react to finally generate the nitrided ferrovanadium, and the production process is completed in the continuous nitriding device designed by the invention.
Referring to fig. 1 to 4, the present invention provides a ferrovanadium continuous nitriding apparatus 100, which mainly comprises: the device comprises a gas tank 1, a first cylinder 2, a feeding table 3, a push rod 4, a material room supporting table 5, a nitrogen gas inlet channel 6, a waste gas collecting channel 7, a water outlet 8, a cooling water jacket 9, a discharging table 10, a furnace door 11, a first heating assembly 12, a heat insulation plate 13, a second heating assembly 14, a heat insulation assembly 15, a water inlet 16, a mechanical claw 17, a material room 18 and a feeding plate 19.
Specifically, first cylinder 2 passes through the interface channel with gas tank 1 and is connected, is equipped with the ooff valve on the interface channel, can control switch and flow size, and the push pedal on 4 end-installations perpendicular ground of push rod of first cylinder 2, the push pedal can promote the feeding plate 19 and slowly move. The first cylinder 2 and the feeding plate 19 are both placed on the feeding table 3, and the feeding plate 19 is placed on the feeding table 3 in parallel.
The material room 18 is divided into six temperature areas, namely a preheating area 27, a transition area 28, a high temperature area 29, a high temperature slow cooling area 30, a low temperature slow cooling area 31 and a water cooling area 32. The temperature of the preheating zone 27 is 400 ℃ to 900 ℃, the temperature of the transition zone 28 is 1100 ℃ to 1250 ℃, the temperature of the high temperature zone 29 is 1550-. The preheating zone 27 is externally wound with the first heating component 12, the transition zone 28 is externally wound with the heat insulation plate 13, the high-temperature zone 29 is externally wound with the second heating component 14, the water cooling zone 32 is externally wrapped with the cooling water jacket 9, the top of the cooling water jacket 9 is provided with the water inlet 16, the bottom of the cooling water jacket 9 is provided with the water outlet 8, one side of the material room 18 is provided with a plurality of nitrogen gas inlet channels 6, the other side of the material room 18 is provided with a plurality of waste gas collecting pipelines 7, when a workpiece is processed, a nitrogen gas bottle is connected with the nitrogen gas inlet channels 6, and meanwhile, the waste gas collecting pipelines 7 are opened to connect the. The inductor is installed at the bottom of the discharging table 10, when a workpiece is pushed onto the inductor, the mechanical claw 17 starts to work to grab the workpiece, the workpiece and the feeding plate 19 can be separated, and the discharging table 10 is stepped, is low in tail end and can be used for stacking the feeding plate 19. When the workpiece is gripped by the gripper 17, only the feed plate 19 remains on the discharge table 10, and the feed plate 19 is pushed to fall to the step with the subsequent discharge.
As shown in FIG. 2, the structure of the temperature zone between materials of the ferrovanadium continuous nitriding device is shown, wherein the preheating zone 27, the transition zone 28, the high temperature zone 29, the high temperature slow cooling zone 30, the low temperature slow cooling zone 31 and the water cooling zone 32 are arranged in the temperature zone. The length ratios of the six temperature zones are respectively 4: 2: 4: 2: 4: 2.5; the four temperature intervals of the preheating zone 27 are respectively 400 ℃, 650 ℃, 650 ℃ and 900 ℃; the temperature range of the transition zone 28 is 1100 ℃ and 1250 ℃; the temperature of the high-temperature area 29 is constant at 1550 ℃; the temperature of the high temperature buffer zone 30 is 1250 deg.c and 1100 deg.c. The heating material of the preheating zone 27 is a resistance wire; the first temperature interval of the transition zone 28 and the second temperature interval of the high temperature slow cooling zone 30 are both 1100 ℃.
As shown in fig. 3, the schematic view of the placing structure of the material feeding plate 19 and the material block 33 is shown, the material feeding plate 19 is of a net structure, the net structure can ensure that the bottom of the material block 33 can be fully reacted, the placing mode of the material block 33 can complete multiple material processing in a limited space as much as possible, and meanwhile, the material is fully contacted with gas, so that the reaction is more thorough. One feed plate 19 can hold 19 pieces of material 33, the first layer holds 12 pieces, and is divided into three stacks of 4 pieces, each stack being spaced apart by about one quarter of the length of the feed plate 19, and the second layer holds 7 pieces of material 33 side by side.
As shown in fig. 4, which is a schematic structural diagram of the oven door 22, two sides of the bottom of the oven door 22 are provided with second cylinders 25, the second cylinders 25 are connected with the gas tank 1 through an inflation channel 26, the inflation channel 26 is provided with a switch valve capable of adjusting gas flow, when the second cylinders 25 are connected with the gas tank 1, the support push rods 20 are pushed out along with the increase of the gas pressure in the second cylinders 25, the support oven door 22 is opened, when the support push rods 22 are pushed to the top end, the pressure sensor of the rod compartment of the second cylinders 25 senses a certain concentration, the inflation channel 26 starts to discharge gas, the pressure of the second cylinders 25 is reduced, the support push rods 20 fall back, and the oven door 22 falls.
The general working process of the ferrovanadium continuous nitriding process comprises the following steps:mixing with vanadium oxide (V)2O5And V2O3) Iron oxide, carbon powder, pressed into briquettes, placed on the feed plate 19. The first cylinder 2 pushes the material into the material room 18 through the push rod 4, and the material which enters firstly sequentially passes through the preheating zone 27, the transition zone 28, the high-temperature zone 29, the high-temperature slow cooling zone 30, the low-temperature slow cooling zone 31 and the water cooling zone 32 along with the continuous pushing of the subsequent material. The temperature is increased from 400 ℃ to 1550 ℃, and then the heat preservation and cooling treatment is carried out from 1550 ℃. At the same time, the nitrogen inlet channel 6 is opened to introduce nitrogen, the waste gas collecting pipeline 7 is opened to remove waste gas in the reaction process, and the reaction is started. The material firstly enters a preheating temperature zone, the temperature is increased from 400 ℃ to 900 ℃, and in the process, the material is dried; with the rise of temperature, vanadium oxide reacts with carbon powder to generate gold vanadium, iron oxide reacts with carbon powder to generate metallic iron, intermediate products such as carbon monoxide, vanadium nitride, vanadium carbide and the like can be generated in the process, and the generated vanadium nitride is fused with iron at high temperature to generate vanadium iron nitride. After high-temperature fusion, the materials are buffered through a high-temperature slow cooling area and a low-temperature slow cooling area, so that the reaction is more thorough. And finally, passing through a water cooling area for final cooling treatment. After the above steps are completed, the discharge door at the end of the material room 18 is opened, because the push rod 4 continuously delivers the feeding plate 19 and the materials to the material room 18, the feeding plate 19 which completes the process first is pushed by the feeding plate 19 behind to reach the position of the discharge table 10, and then the continuous nitriding product ferrovanadium nitride is taken out, and the feeding plate 19 is recovered and reused.
In the description of the present invention, it should be noted that the terms "center", "top", "bottom", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
The principle and the implementation mode of the invention are explained by applying a specific example, and the description of the embodiment is only used for helping to understand the method and the core idea of the invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (9)
1. The utility model provides a ferrovanadium continuous nitriding device which characterized in that: comprises a gas tank, a feeding table, a material chamber supporting table and a discharging table which are sequentially and horizontally arranged; a first air cylinder is horizontally arranged on the feeding table, one end of the first air cylinder is connected with the air tank through a connecting channel, a vertically arranged push plate is installed at the tail end of a push rod at the other end of the first air cylinder, a plurality of feeding plates are sequentially arranged in parallel at one end of the push plate, which is far away from the first air cylinder, and the feeding plates are used for placing material blocks; the material room supporting table is fixedly provided with a material room with two open ends, and a nitriding interval is arranged in the material room.
2. The apparatus for continuously nitriding vanadium iron according to claim 1, wherein: the nitriding interval in the material room comprises a preheating area, a transition area, a high-temperature slow cooling area, a low-temperature slow cooling area and a water cooling area which are arranged in sequence; the temperature of the preheating zone is 400-900 ℃, the temperature of the transition zone is 1100-1250 ℃, the temperature of the high-temperature zone is 1550-1600 ℃ all the time, and the temperature of the high-temperature slow cooling zone is reduced from 1250 ℃ to 1100 ℃.
3. The apparatus for continuously nitriding vanadium iron according to claim 2, wherein: the heating device is characterized in that a first heating assembly is wound outside the preheating zone, a heat insulation plate is wrapped outside the transition zone, a second heating assembly is wound outside the high-temperature zone, a cooling water jacket is wrapped outside the water cooling zone, a water inlet is formed in the top of the cooling water jacket, and a water outlet is formed in the bottom of the cooling water jacket.
4. The apparatus for continuously nitriding vanadium iron according to claim 1, wherein: a plurality of nitrogen gas inlet channels are uniformly formed in one side of the material room, and a plurality of waste gas collecting pipelines are uniformly formed in the other side of the material room.
5. The apparatus for continuously nitriding vanadium iron according to claim 1, wherein: the discharging platform is of a stepped structure, and the height of one end, far away from the material room, of the discharging platform is smaller than the height of one end, close to the material room, of the discharging platform.
6. The apparatus for continuously nitriding vanadium iron according to claim 1, wherein: the discharging table is characterized in that a mechanical claw is arranged above the discharging table, an inductor is arranged at the bottom of the discharging table, and the inductor is electrically connected with the control end of the mechanical claw.
7. The apparatus for continuously nitriding vanadium iron according to claim 1, wherein: the feeding plates are of a net structure, and 19 material blocks can be placed on one feeding plate.
8. The apparatus for continuously nitriding vanadium iron according to claim 1, wherein: the furnace door is arranged at the opening at two ends of the material room, the second air cylinders which are vertically arranged are arranged at two sides of the bottom of the furnace door, the second air cylinders are connected with the gas tank through an inflation channel, a switch valve is arranged on the inflation channel and can adjust the gas flow, the top of a supporting push rod of each second air cylinder is connected with the bottom of the furnace door, and a pressure sensor is arranged in a rod cabin of each second air cylinder; the furnace door is characterized in that cross beams are fixedly arranged above openings at two ends of the material room, bearings are mounted on the cross beams, chains are wound in the bearings, and the tail ends of the chains are fixedly connected with the bottom of the furnace door.
9. A ferrovanadium continuous nitriding process is characterized in that: the method comprises the following steps:
firstly, pressing powder mixed with vanadium oxide, iron oxide and carbon into blocks, and placing the blocks on a feeding plate;
pushing the materials into a material room through a first air cylinder, sequentially passing the materials which enter firstly through a preheating zone, a transition zone, a high-temperature slow cooling zone, a low-temperature slow cooling zone and a water cooling zone along with the continuous pushing of the subsequent materials, simultaneously opening a vent hole to introduce nitrogen, opening an exhaust port to remove waste gas in the reaction process, and starting the reaction;
and step three, after the steps are completed, the furnace door at the tail end of the material room is opened, the first air cylinder continuously delivers the material plates and the materials to the material room, the material plates which complete the process firstly are pushed by the material plates behind to reach the position of the material discharging table, then the continuous nitridation product ferrovanadium nitride is taken out, and the feeding plate is recycled for reuse.
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