CN205420474U - Low -temperature protection atmosphere degrease annealing stove - Google Patents
Low -temperature protection atmosphere degrease annealing stove Download PDFInfo
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- CN205420474U CN205420474U CN201520938104.7U CN201520938104U CN205420474U CN 205420474 U CN205420474 U CN 205420474U CN 201520938104 U CN201520938104 U CN 201520938104U CN 205420474 U CN205420474 U CN 205420474U
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- defat
- dewaxing
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Abstract
The utility model provides a low -temperature protection atmosphere degrease annealing stove, it includes: degrease dewaxing room, annealing room and water cooling chamber, the export of degrease dewaxing room with the entry intercommunication of annealing room, the export of annealing room and the entry intercommunication of water cooling chamber. Degrease dewaxing room is used for handling carrying work piece to it in to carry out degrease dewaxing technology, and degrease dewaxing room is including setting up in the indoor burning air cock of degrease dewaxing, the moist atmosphere of the indoor formation oxidability of degrease dewaxing, and the natural gas provides the heat through the burning air cock in the indoor burning of degrease dewaxing, and the work piece evaporates the wax fat that by complete combustion, discharges through the gas vent of degrease dewaxing room, the annealing room is used for keeping warm technology under the protective atmosphere and handling accomplishing work piece after the degrease dewaxing technology, the water cooling chamber is used for carrying out cooling treatment with the work piece of accomplishing after the heat preservation technology. Compared with the prior art, the utility model discloses not only can realize quick degrease dewaxing technology, but also realize low temperature annealing's under protective atmosphere technological requirement.
Description
[technical field]
This utility model relates to technical field of heat treatment, is specifically designed a kind of low-temperature protection atmosphere defat annealing furnace.
[background technology]
At present, on market, overwhelming majority defat dewaxing furnace is to be slowly heated under dry reducing atmosphere, and treatment temperature maintains 700～900 DEG C, and the process time is 15～30min, substantial amounts of slop wax and soot residue is had, it is impossible to meet the technology requirement of quick defat dewaxing in workpiece and stove.
It addition, the safe handling temperature of usual hydrogen is 570 DEG C, this also determines and uses hydrogen to necessarily be greater than 570 DEG C as the heat treatment temperature of the Equipment for Heating Processing of protective atmosphere.Such as; it is usually above hydrogen LFL lower flammable limit in atmosphere (101.325kPa) 570 DEG C with the operating temperature of hydrogen, the special atmosphere furnace of nitrogen composition; obviously, this cannot meet workpiece process annealing requirement under the protective atmosphere formed with hydrogen, nitrogen.
Therefore, it is necessary to propose a kind of improved plan to solve above-mentioned technical problem.
[utility model content]
The purpose of this utility model is to provide low-temperature protection atmosphere defat annealing furnace and technique, and it is possible not only to realize quick defat dewaxing technique, but also achieves stress relief annealed technological requirement under the protective atmosphere formed with hydrogen and nitrogen.
In order to solve the problems referred to above, this utility model provides a kind of low-temperature protection atmosphere defat annealing furnace, comprising: defat dewaxing room, annealing chamber and water cooling chamber, the outlet of described defat dewaxing room connects with the entrance of described annealing chamber；The outlet of described annealing chamber connects with the entrance of described water cooling chamber.Described defat dewaxing room is for carrying out defat dewaxing technique process to being delivered to its interior workpiece, described defat dewaxing room includes being arranged at the burning valve that described defat dewaxing is indoor, the indoor formation oxidisability humid atmosphere of defat dewaxing, natural gas provides heat by burning valve in defat dewaxing Indoor Combustion, the wax fat that workpiece steams is completely burned, and the air vent through defat dewaxing room is discharged；Described annealing chamber is for carrying out heat preservation method process to the workpiece after completing defat dewaxing technique under protective atmosphere；Described water cooling chamber workpiece after completing heat preservation method carries out cooling process.
Further, the atmosphere temperature of described defat dewaxing room is more than 600 DEG C；The workpiece temperature of described defat dewaxing indoor is less than 600 DEG C；Described annealing chamber includes annealing chamber's shell, heater and the Muffle being arranged in annealing chamber's shell; restitutive protection's gas it is filled with in described Muffle; Muffle pot is heated by heater, and workpiece moves in Muffle pot, and the holding temperature of described annealing chamber controls below 570 DEG C.
Further, described defat dewaxing room also includes temperature control thermocouple, and described temperature control thermocouple is for being controlled the atmosphere temperature that described defat dewaxing is indoor, and the definite value being arranged on by atmosphere temperature between 600～700 DEG C；By arranging the speed of the guipure of carrying workpiece, it is ensured that workpiece own temperature during whole defat dewaxes is less than 600 DEG C.
Further, described low-temperature protection atmosphere defat annealing furnace also includes hydrogen leak detection device and nitrogen purging device, described hydrogen leak detection device is pointed to the gas between annealing chamber's shell and Muffle by the Muffle leakage hydrogen detection mouth being arranged in described annealing chamber and carries out density of hydrogen detection, if detecting, the hydrogen being leaked to outside Muffle reaches to set concentration, then display alarm start nitrogen purging device, by nitrogen purging import in stove, nitrogen it is passed through in stove, until alarm eliminates, the nitrogen being passed through in stove is discharged by the exhaust port of annealing chamber.
Further, the restitutive protection's gas in described Muffle includes nitrogen and hydrogen；Described restitutive protection's gas is passed through interface is passed through in described Muffle via hydrogen, nitrogen in the stove of annealing chamber's afterbody, and the flow direction making protective atmosphere is contrary with the moving direction of workpiece；In annealing chamber, defat dewaxing junction, room is provided with the differential pressure transmitter interface of detection pressure reduction.
Further, described water cooling chamber is connected with nitrogen, to prevent workpiece oxidized, concurrently forms certain pressure, to stop that the hydrogen in annealing chamber overflows from water cooling chamber；The end of water cooling chamber is provided with Oxygen Check equipment, checks the mole content of oxygen in water-cooled internal ambience.
Further, described water cooling chamber includes first order water cooling chamber, second level water cooling chamber and the third level water cooling chamber being sequentially connected between its entrance and exit.Wherein, first water cooling chamber's unit inner chamber is placed with bracket, and guipure carries workpiece and moves on bracket；In second level water cooling chamber and third level water cooling chamber, guipure carries the workpiece interior intracavity in second level water cooling chamber and third level water cooling chamber and moves.
Further, described low-temperature protection atmosphere defat annealing furnace also includes air-cooling chamber, and workpiece arrives air-cooling chamber through water cooling chamber, and the circulated air in air-cooling chamber is perpendicular to workpiece direction of advance, to cool down workpiece.
Further, the outlet of described defat dewaxing room passes through Flange joint with the entrance of annealing chamber, nitrogen sparge tube and Oxygen Check device are installed in the porch of Muffle, described Oxygen Check device is for checking whether the porch of Muffle has oxygen, if having checked oxygen, then start nitrogen purging device, be passed through nitrogen by nitrogen sparge tube.
Further; low-temperature protection atmosphere defat annealing furnace also includes the pilot being arranged on outside the entrance of defat dewaxing room and is arranged at the enclosure above described pilot; it is passed into the indoor hydrogen of defat dewaxing via the annealing chamber at rear portion to dewax Indoor Combustion in defat; the hydrogen that residue the is not burned entrance from defat dewaxing room is discharged; via pilot burn off, waste gas is discharged via the enclosure being arranged on above described pilot.
Compared with prior art, this utility model can realize the quick defat dewaxing of metallic sintered products, and surface of the work is interior with stove without slop wax and soot residue simultaneously, and workpiece remains light；And the hydrogen use temperature in heat-treatment of annealing field is reduced to less than 570 DEG C from higher than 570 DEG C, starts the range having widened hydrogen at Field of Heat-treatment.
[accompanying drawing explanation]
In order to be illustrated more clearly that the technical scheme of this utility model embodiment, in describing embodiment below, the required accompanying drawing used is briefly described, apparently, accompanying drawing in describing below is only embodiments more of the present utility model, for those of ordinary skill in the art, on the premise of not paying creative work, it is also possible to obtain other accompanying drawing according to these accompanying drawings.Wherein:
Fig. 1 shows the structural representation of this utility model low-temperature protection atmosphere defat annealing furnace in one embodiment；
Fig. 2 shows the defat dewaxing room structural representation in one embodiment in this utility model；
Fig. 3 (a) shows the structural representation in one embodiment of the annealing chamber in this utility model, which show the Muffle structure of inside；
Fig. 3 (b), for show the exterior contour figure in one embodiment of the annealing chamber in this utility model, which show the profile of annealing chamber's shell；
Fig. 4 shows the defat dewaxing room in this utility model and the connecting portion structural representation in one embodiment of annealing chamber.
[detailed description of the invention]
Understandable for enabling above-mentioned purpose of the present utility model, feature and advantage to become apparent from, with detailed description of the invention, this utility model is described in further detail below in conjunction with the accompanying drawings.
" embodiment " or " embodiment " referred to herein refers to may be included in special characteristic, structure or the characteristic at least one implementation of this utility model.Different in this manual local " in one embodiment " occurred not refer both to same embodiment, are not single or the most mutually exclusive with other embodiments embodiment.Unless stated otherwise, connection herein, be connected, connect represent that the word being electrically connected with all represents and be directly or indirectly electrical connected.
Refer to shown in Fig. 1, it is the structural representation of this utility model low-temperature protection atmosphere defat annealing furnace in one embodiment.Low-temperature protection atmosphere defat annealing furnace shown in Fig. 1 includes feeding rack 110, defat dewaxing room 120, annealing chamber 130, water cooling chamber 140, air-cooling chamber 150 and discharge rack 160.Described feeding rack 110 is positioned at the front end of described defat dewaxing room 120 entrance；The outlet of described defat dewaxing room 120 connects with the entrance of described annealing chamber 130；The outlet of described annealing chamber 130 connects with the entrance of described water cooling chamber 140；The outlet of described water cooling chamber 140 connects with the entrance of described air-cooling chamber 150；Described discharge rack 160 is positioned at the rear end of described air-cooling chamber 150.
Described feeding rack 110 for being delivered to described defat dewaxing room 120 by workpiece, concrete, and workpiece is carry by guipure and enters into described defat dewaxing room 120 through feeding rack 110.
Described defat dewaxing room 120 is for carrying out defat dewaxing technique process to being delivered to its interior workpiece.Refer to shown in Fig. 2, it is the defat dewaxing room structural representation in one embodiment in Fig. 1.Defat dewaxing room 6 shown in Fig. 2 includes burner 5 and temperature control thermocouple 8.
In the embodiment shown in Figure 2, workpiece is carry by guipure, and the lever gear door 3 through elevated certain opening height enters defat dewaxing indoor.Guipure moves on bracket, relies on carborundum to support 7 realizations support to bracket inside defat dewaxing room 6.A certain amount of natural gas is passed through and is arranged at the burner 5 that described defat dewaxing is indoor, substantial amounts of air is passed through in defat dewaxing room 6, defat dewaxing room 6 forms oxidisability humid atmosphere, natural gas provides heat by burner 5 in the indoor fully burning of defat dewaxing, to realize the quick defat dewaxing function of workpiece, meanwhile, the wax fat that workpiece steams is completely burned, and the air vent through defat dewaxing room is discharged.Simultaneously, it is passed into the indoor hydrogen of defat dewaxing also in the indoor participation combustion reaction of defat dewaxing via the annealing chamber at rear portion, residue does not has the burned hydrogen entrance from described defat dewaxing room to discharge, and by pilot 2 burn off being arranged at outside the entrance of described defat dewaxing room, waste gas is discharged via the enclosure 1 being arranged at above described pilot 2.
In whole defat dewaxing process, the temperature of workpiece is controlled in less than 600 DEG C all the time；The internal ambience temperature of defat dewaxing room maintains more than 600 DEG C.In embodiment shown in Fig. 2, in whole defat dewaxing process, described temperature control thermocouple 8 is for carrying out real-time online control, and the definite value being arranged on by atmosphere temperature between 600～700 DEG C to the atmosphere temperature that described defat dewaxing is indoor；By arranging the speed of the guipure of carrying workpiece, it is ensured that workpiece own temperature during whole defat dewaxes is less than 500 DEG C.It is built into by the insulation material 4 of the non-carcinogenic grade meeting Europe MSDS and COSHH standard in defat dewaxing room 6.
Owing to this utility model forms oxidisability humid atmosphere in defat dewaxing room, fuel burner nozzle burning natural gas is utilized to provide heat, realize the quick defat dewaxing function of workpiece, and the wax fat that workpiece steams is completely burned, air vent through defat dewaxing room is discharged, it is thereby achieved that the quick defat dewaxing of workpiece, and surface of the work is interior with stove without slop wax, soot residue.
Workpiece, after described defat dewaxing room 120 completes defat dewaxing technique, enters described annealing chamber 130.
Described annealing chamber 130 is for carrying out heat preservation method process to the workpiece after completing defat dewaxing technique under protective atmosphere.Refer to shown in Fig. 3 (a) and Fig. 3 (b), wherein, Fig. 3 (a) is the structural representation in one embodiment of the annealing chamber in Fig. 1, which show the Muffle structure of inside；Fig. 3 (b) is the exterior contour figure in one embodiment of the annealing chamber in Fig. 1, which show the profile of annealing chamber's shell.Described annealing chamber includes annealing chamber's shell 310, heater (sign) and the Muffle 320 being sheathed in described annealing chamber shell 310; holding stage in annealing chamber; continual in described Muffle 320 it is passed through hydrogen and nitrogen; to form restitutive protection's atmosphere, can effectively prevent the phenomenon that workpiece is the most oxidized；Being heated Muffle by heater, the heat preservation method for workpiece provides origin of heat, and workpiece can move in Muffle.The holding temperature of described annealing chamber can control below 570 DEG C, and such as, its holding temperature may be controlled to a definite value between 500 DEG C-570 DEG C.
In the embodiment shown in Fig. 3 (a), described annealing chamber is divided into four districts along its entrance to Way out, and each district uses temperature control thermocouple and explosion-proof thermocouple to be controlled temperature；In Fig. 3 (b), temperature control thermocouple is respectively 12,14,16 and 17, and explosion-proof thermocouple is 21,22,23 and 24.In one embodiment, Muffle is heated by heater at the above-below direction outside Muffle, and this mode of heating can avoid the heat direct radiation to workpiece, and temperature homogeneity is effectively guaranteed.It should be noted that annealing chamber of the present utility model also can be divided into 3, multiple regions such as 5, carry out temperature control.
In the embodiment shown in Fig. 3 (b); being passed through interface 26 be passed through in described Muffle by protective atmosphere via hydrogen, nitrogen in the stove of annealing chamber's afterbody (i.e. annealing chamber 130 is near the part of water cooling chamber 140), the flow direction making protective atmosphere is contrary with the moving direction of workpiece.In actual treatment workpiece fabrication; detected device (not shown) by density of hydrogen by being arranged at gas sample mouth 25 in the Muffle in described annealing chamber, Muffle composition of gases within to be monitored in real time; guarantee that hydrogen content in protective atmosphere gaseous mixture is less than a predetermined value; such as, this predetermined value is 25%.Whether have that hydrogen leak is internal to annealing chamber and the concentration of hydrogen is revealed in monitoring to detect Muffle, hydrogen leak detect device (not shown) and reveal, by the Muffle being arranged in described annealing chamber, the gas that hydrogen detection mouth 13 and 15 is pointed between annealing chamber's shell 310 and Muffle and carry out density of hydrogen and detect in real time.
The detection that Muffle is revealed hydrogen is extremely important, its reason is: in this utility model, the holding temperature of annealing chamber 130 is arranged to less than 570 DEG C, such as 500 DEG C-570 DEG C, less than hydrogen minimum burning point (101.325kPa) 570 DEG C, the hydrogen so revealed cannot spontaneous combustion, it is impossible to whether the interior Muffle that judges to come out of the stove from naked eyes hydrogen leak occurs, once escape into outside stove, be extremely dangerous.If hydrogen gas leakage detection device is revealed hydrogen detection mouth 13 and 15 by Muffle and is detected that the hydrogen being leaked to outside Muffle reaches certain concentration, will display alarm, start nitrogen purging device (not shown) simultaneously, in annealing chamber, nitrogen it is passed through, until alarm eliminates by nitrogen purging import 17 in stove.The nitrogen being passed through in stove is discharged by exhaust port 11.Owing to just becoming critically important for restitutive protection's atmosphere, the pressure reduction of real-time dynamic monitoring annealing chamber 27 and defat dewaxing junction, room 6 in being necessary to ensure that Muffle, the differential pressure transmitter interface 20 in annealing chamber 27 with defat dewaxing junction, room 6 plays a part to monitor pressure reduction.Whole annealing chamber 27 is divided into lower half, two parts to be bolted, and eliminates the design of the body of heater+upper cover of tradition net belt type heat-treatment furnace.This be divided into two, bolted design is conducive to production and assembly greatly, blow-on maintenance.
Refer to shown in Fig. 4, it is in one embodiment, the defat dewaxing room in Fig. 1 and the structural representation of the connecting portion of annealing chamber.In the embodiment shown in fig. 4, the outlet of described defat dewaxing room 6 is connected by flange 28 with the entrance of annealing chamber 27, and is provided with nitrogen sparge tube 9 and Oxygen Check device 10 in the porch of Muffle.Owing to defat dewaxing indoor are oxidisability humid atmosphere, in order to prevent oxidizing gas from entering in the Muffle of annealing chamber, at defat dewaxing room 6 and annealing chamber 27 junction installation oxygen detection device 10, once it is tested with oxygen, start nitrogen purging device immediately, be passed through nitrogen by nitrogen sparge tube 9, with reach completely cut off oxidizing gas enter annealing chamber Muffle in purpose.Guipure moves on the bracket 29 within Muffle, it is to avoid Muffle directly contacts with guipure, improves the service life of Muffle.
Please continue to refer to shown in Fig. 1, workpiece, after annealing chamber 130 completes heat preservation method, enters described water cooling chamber 140.
The described water cooling chamber 140 workpiece after completing heat preservation method is cooled to room temperature.Described water cooling chamber includes water cooling chamber's body and is arranged on this external cooling water circulating device of water cooling chamber, is continually fed into nitrogen, to prevent workpiece oxidized, concurrently forms certain pressure in water cooling chamber, overflows from water cooling chamber with the effective hydrogen stopped in annealing chamber.
In the embodiment shown in fig. 1, described water cooling chamber 140 includes first order water cooling chamber 142, second level water cooling chamber 144 and the third level water cooling chamber 146 being sequentially connected between water cooling chamber's entrance and exit.Described water cooling chamber 140 is divided into three Room two classes, wherein, the interior intracavity being tightly connected the first order water cooling chamber 142 after annealing chamber 130 is placed with bracket, guipure carries workpiece and moves on bracket, the cooling water cooling that the intracavity gas of first order water cooling chamber 142 is constantly passed through outside chamber, the gas wrapping obtaining cooling workpiece, completes the first refrigerating work procedure to workpiece；The second water cooling chamber 144 being connected to first water cooling chamber 142 and the 3rd road water cooling chamber 146 being connected to second water cooling chamber 144 use guipure and directly move at interior intracavity, inner chamber by chamber outside cooling water cooling, the inner chamber after cooling down complete the second refrigerating work procedure to workpiece (the most quickly cooling).It addition, the end in water cooling chamber 140 is provided with Oxygen Check equipment (not shown), check the mole content of oxygen in water-cooled internal ambience.
Workpiece arrives air-cooling chamber 150 through water cooling chamber 140, and the circulated air in air-cooling chamber 150 is perpendicular to workpiece direction of advance, and strength blows over workpiece, it is achieved the cooling to workpiece.Workpiece temperature is down to room temperature, realizes the discharging of workpiece through discharge rack 160, meanwhile, adds material reminding alarm device (not shown) in discharge rack part.
In this utility model, in whole defat dewaxing process, the temperature of workpiece controls all the time below 600 DEG C, and the temperature of internal ambience maintains more than 600 DEG C.Defat dewaxing room 120 and annealing chamber 130 heat and separate; atmosphere communicates; air seal and detection means is used to realize workpiece with hydrogen, the process annealing function of the annealing section less than 570 DEG C of the protective atmosphere of nitrogen composition; breach hydrogen and be applied to Field of Heat-treatment at less than 570 DEG C, meet workpiece process annealing requirement under the protective atmosphere formed with hydrogen, nitrogen.Complete equipment of the present utility model meets Europe EN746 industry Equipment for Heating Processing convention security requirement, for using hydrogen to provide guarantee at less than 570 DEG C.
It is pointed out that any change that detailed description of the invention of the present utility model done by one skilled in the art scope all without departing from claims of the present utility model.Correspondingly, the scope of claim of the present utility model is also not limited only to previous embodiment.
Claims (10)
1. a low-temperature protection atmosphere defat annealing furnace, it is characterised in that comprising: defat dewaxing room, annealing chamber and water cooling chamber, the outlet of described defat dewaxing room connects with the entrance of described annealing chamber；The outlet of described annealing chamber connects with the entrance of described water cooling chamber,
Described defat dewaxing room includes air vent and is arranged at the burning valve that described defat dewaxing is indoor, and natural gas provides heat by burning valve in defat dewaxing Indoor Combustion.
Low-temperature protection atmosphere defat annealing furnace the most according to claim 1, it is characterised in that
Described annealing chamber includes annealing chamber's shell, heater and the Muffle being arranged in annealing chamber's shell, is filled with restitutive protection's gas in described Muffle.
Low-temperature protection atmosphere defat annealing furnace the most according to claim 2, it is characterised in that
Described defat dewaxing room also includes temperature control thermocouple, and described temperature control thermocouple is for being controlled the atmosphere temperature that described defat dewaxing is indoor.
Low-temperature protection atmosphere defat annealing furnace the most according to claim 1, it is characterised in that
Described low-temperature protection atmosphere defat annealing furnace also includes hydrogen leak detection device and nitrogen purging device,
It is provided with Muffle in described annealing chamber and reveals nitrogen purging import and exhaust port in hydrogen detection mouth, stove,
Described hydrogen leak detection device carries out density of hydrogen detection owing to the Muffle leakage hydrogen detection mouth by being arranged in described annealing chamber is pointed to the gas between annealing chamber's shell and Muffle；Described nitrogen purging device is for being passed through nitrogen by nitrogen purging import in stove in stove；Described exhaust port is discharged for the nitrogen being passed through in stove.
Low-temperature protection atmosphere defat annealing furnace the most according to claim 4, it is characterised in that
Restitutive protection's gas in described Muffle includes nitrogen and hydrogen；
The afterbody of described annealing chamber is additionally provided with hydrogen in stove, nitrogen is passed through interface, and described restitutive protection's gas is passed through interface is passed through in described Muffle via hydrogen, nitrogen in described stove；
In annealing chamber, defat dewaxing junction, room is provided with the differential pressure transmitter interface of detection pressure reduction.
Low-temperature protection atmosphere defat annealing furnace the most according to claim 1, it is characterised in that
Described water cooling chamber is connected with nitrogen；
The end of water cooling chamber is provided with Oxygen Check equipment, so Oxygen Check equipment is for checking the mole content of oxygen in water-cooled internal ambience.
Low-temperature protection atmosphere defat annealing furnace the most according to claim 6, it is characterised in that
Described water cooling chamber includes first order water cooling chamber, second level water cooling chamber and the third level water cooling chamber being sequentially connected between its entrance and exit,
Wherein, first water cooling chamber's unit inner chamber is placed with bracket, and guipure carries workpiece and moves on bracket；
In second level water cooling chamber and third level water cooling chamber, guipure carries the workpiece interior intracavity in second level water cooling chamber and third level water cooling chamber and moves.
Low-temperature protection atmosphere defat annealing furnace the most according to claim 6, it is characterised in that
Described low-temperature protection atmosphere defat annealing furnace also includes air-cooling chamber, and the outlet of described water cooling chamber connects with the entrance of described air-cooling chamber, and the circulated air in air-cooling chamber is perpendicular to workpiece direction of advance.
Low-temperature protection atmosphere defat annealing furnace the most according to claim 1, it is characterised in that
The outlet of described defat dewaxing room and the entrance of annealing chamber, by Flange joint, are provided with nitrogen sparge tube and Oxygen Check device in the porch of Muffle,
Described Oxygen Check device, for checking whether the porch of Muffle has oxygen, if having checked oxygen, then starts nitrogen purging device, is passed through nitrogen by nitrogen sparge tube.
Low-temperature protection atmosphere defat annealing furnace the most according to claim 1, it is characterised in that it also includes the pilot being arranged on outside the entrance of defat dewaxing room and is arranged at the enclosure above described pilot.
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| CN201520938104.7U CN205420474U (en) | 2015-11-20 | 2015-11-20 | Low -temperature protection atmosphere degrease annealing stove |
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| CN201520938104.7U CN205420474U (en) | 2015-11-20 | 2015-11-20 | Low -temperature protection atmosphere degrease annealing stove |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282469A (en) * | 2016-08-24 | 2017-01-04 | 古恒威 | A kind of efficient ferrum purifying plant |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106282469A (en) * | 2016-08-24 | 2017-01-04 | 古恒威 | A kind of efficient ferrum purifying plant |
| CN106282469B (en) * | 2016-08-24 | 2018-08-14 | 古恒威 | A kind of efficient iron purifying plant |
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Effective date of registration: 20170327 Address after: Nanxiang Road 224100 Jiangsu province Yancheng City Dafeng Economic Development Zone No. 333 Patentee after: Jiangsu Dong Feng Technology Co., Ltd. Address before: Nanxiang Road 224199 Jiangsu province Yancheng City economic and Technological Development Zone No. 333 Patentee before: Jiangsu Fengdong Thermal Technology Co., Ltd. |