CN203550520U - Muffle furnace - Google Patents
Muffle furnace Download PDFInfo
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- CN203550520U CN203550520U CN201320621109.8U CN201320621109U CN203550520U CN 203550520 U CN203550520 U CN 203550520U CN 201320621109 U CN201320621109 U CN 201320621109U CN 203550520 U CN203550520 U CN 203550520U
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- furnace
- heating element
- muffle furnace
- water tank
- cooling water
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- 238000010438 heat treatment Methods 0.000 claims abstract description 48
- 239000000498 cooling water Substances 0.000 claims abstract description 23
- 239000004576 sand Substances 0.000 claims abstract description 7
- 239000000779 smoke Substances 0.000 claims abstract description 7
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 5
- 239000012528 membrane Substances 0.000 claims description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 claims description 3
- 229910006295 Si—Mo Inorganic materials 0.000 claims description 3
- 229910002091 carbon monoxide Inorganic materials 0.000 claims description 3
- 239000001257 hydrogen Substances 0.000 claims description 3
- 229910052739 hydrogen Inorganic materials 0.000 claims description 3
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- 239000000463 material Substances 0.000 abstract description 9
- 238000011020 pilot scale process Methods 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 230000001603 reducing effect Effects 0.000 abstract description 5
- 238000012360 testing method Methods 0.000 abstract description 5
- 230000008901 benefit Effects 0.000 abstract description 3
- 230000009970 fire resistant effect Effects 0.000 abstract 3
- 230000007363 regulatory process Effects 0.000 abstract 1
- 230000009467 reduction Effects 0.000 description 17
- 238000004088 simulation Methods 0.000 description 7
- 239000007789 gas Substances 0.000 description 5
- 238000005453 pelletization Methods 0.000 description 5
- 238000013142 basic testing Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000010926 purge Methods 0.000 description 3
- 230000005855 radiation Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000012512 characterization method Methods 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003628 erosive effect Effects 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000003500 flue dust Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002893 slag Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
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- Muffle Furnaces And Rotary Kilns (AREA)
Abstract
The utility model provides a muffle furnace, which comprises a furnace body, a fire-resistant material layer, a heating element and a cooling water tank, wherein a furnace cavity is defined in the furnace body, the top surface of the furnace cavity is open, the furnace cavity is provided with a gas inlet, a gas taking opening and a smoke discharge opening, a furnace door is arranged on the furnace body, the fire-resistant material layer is arranged in the furnace cavity and is positioned at the top of the furnace cavity, the heating element passes through the fire-resistant material layer and downwards extends into the furnace cavity, the cooling water tank is arranged above the heating element and is adjacent to the heating element, a preset gap is arranged between the cooling water tank and the top end of the furnace body, and a fine sand layer is filled in the gap. The muffle furnace according to the embodiment of the utility model has the advantages that the reducing state of a rotary hearth furnace can be effectively simulated, the one-step success of pilot scale test and production in the rotary hearth furnace can be ensured, or the number of times for regulating process parameters on the rotary hearth furnace can be reduced.
Description
Technical field
The utility model relates to field of metallurgical equipment, and particularly, the utility model relates to Muffle furnace.
Background technology
In recent years, rotary hearth furnace direct-reduction is the novel metallurgical equipment that country actively advocates encouragement always.Rotary hearth furnace when work furnace roof, furnace wall are motionless, drive material rotation, and from top radiation, furnace bottom material is carried out to heat reduction by the burner of ring in arranging on furnace wall and outer shroud by furnace bottom machine.Rotary hearth furnace floor space is larger, in general, rotary hearth furnace external diameter on probation is 10 meters of left and right, can only be for several tons, the tens tons reduction tests of up to a hundred tons of materials even, and the operating cost that each blow-on and blowing out drop into is higher, is not easy to very much tentatively groping and studying reducing process parameter.Therefore how simulating rotary hearth furnace carries out basic test research and becomes problem demanding prompt solution and perplexing insider always.
The Muffle furnaces simulation rotary hearth furnaces that adopt carry out basic test research more now, yet Muffle furnace in correlation technique all can not meet simulation rotary hearth furnace, mineral are carried out to the technological requirement of heat reduction, have improved needs.
Utility model content
In order effectively to simulate rotary hearth furnace reduction state, when guaranteeing in rotary hearth furnace pilot scale and producing, reduce the number of times of adjusting rotary hearth furnace process parameter.Inventor of the present utility model provides a kind of Muffle furnace that can effectively simulate rotary hearth furnace direct-reduction, and the heating mode of this Muffle furnace, mode of heating, for reduction, the technical characterictic such as container, recovery time, reducing atmosphere all can be good at simulating rotary hearth furnace reduction technique.
For this reason, the utility model proposes a kind of Muffle furnace, according to the Muffle furnace of the utility model embodiment, comprise: body of heater, in described body of heater, be limited with furnace chamber, the opened top of described furnace chamber, described furnace chamber is provided with air inlet, air hatch and exhaust opening, and described body of heater is provided with fire door; Refractory masses, described refractory masses is located in described furnace chamber and is positioned at the top of furnace chamber; Heating element heater, described heating element heater extend into downwards in described furnace chamber through described refractory masses; Cooling water tank, described cooling water tank is located at described heating element heater top and contiguous described heating element heater, between described cooling water tank and the top of described body of heater, has predetermined gap, is filled with fine sand layer in described gap.Can effectively simulate rotary hearth furnace reduction state thus, to guarantee energy the whole nine yards when rotary hearth furnace pilot scale and production, or reduce the number of times of adjusting technological parameter on rotary hearth furnace.
In addition, according to the Muffle furnace of the utility model above-described embodiment, can also there is following additional technical characterictic:
Preferably, between described refractory masses and the bottom surface of described cooling water tank, be provided with support, described heating element heater hanging is on described support.
Preferably, described heating element heater is U-shaped, and is fixed on described support by clip.
Preferably, the madial wall of described furnace chamber is provided with bearing, and described refractory masses, described support and described cooling water tank are supported on respectively on described bearing.
Preferably, described heating element heater is Si-Mo rod or carbon-point.
Preferably, the distance between the lower end of described heating element heater and the bottom surface of described furnace chamber is 180～220mm.
Preferably, described Muffle furnace also comprises the smoke evacuation deduster being connected with described exhaust opening.
Preferably, in described smoke evacuation deduster, be provided with filter membrane.
Preferably, described air inlet comprises nitrogen inlet, hydrogen inlet and carbon monoxide entrance.
Preferably, described gap is 20mm.
Additional aspect of the present utility model and advantage in the following description part provide, and part will become obviously from the following description, or recognize by practice of the present utility model.
Accompanying drawing explanation
Above-mentioned and/or additional aspect of the present utility model and advantage accompanying drawing below combination obviously and is easily understood becoming the description of embodiment, wherein:
Fig. 1 is according to the structural representation of the Muffle furnace of an embodiment of the present utility model.
Fig. 2 is the internal structure schematic diagram according to the Muffle furnace of another embodiment of the present utility model.
Fig. 3 is the inlet structure schematic diagram according to the Muffle furnace of another embodiment of the present utility model.
The specific embodiment
Describe embodiment of the present utility model below in detail, the example of described embodiment is shown in the drawings, and wherein same or similar label represents same or similar element or has the element of identical or similar functions from start to finish.Below by the embodiment being described with reference to the drawings, be exemplary, be intended to for explaining the utility model, and can not be interpreted as restriction of the present utility model.
In description of the present utility model, it will be appreciated that, term " " center ", " longitudinally ", " laterally ", " length ", " width ", " thickness ", " on ", D score, " front ", " afterwards ", " left side ", " right side ", " vertically ", " level ", " top ", " end " " interior ", " outward ", " clockwise ", orientation or the position relationship of indications such as " counterclockwise " are based on orientation shown in the drawings or position relationship, only the utility model and simplified characterization for convenience of description, rather than device or the element of indication or hint indication must have specific orientation, with specific orientation structure and operation, therefore can not be interpreted as restriction of the present utility model.
In addition, term " first ", " second " be only for describing object, and can not be interpreted as indication or hint relative importance or the implicit quantity that indicates indicated technical characterictic.Thus, one or more these features can be expressed or impliedly be comprised to the feature that is limited with " first ", " second ".In description of the present utility model, the implication of " a plurality of " is two or more, unless otherwise expressly limited specifically.
In the utility model, unless otherwise clearly defined and limited, the terms such as term " installation ", " being connected ", " connection ", " fixing " should be interpreted broadly, and for example, can be to be fixedly connected with, and can be also to removably connect, or connect integratedly; Can be mechanical connection, can be to be also electrically connected to; Can be to be directly connected, also can indirectly be connected by intermediary, can be the connection of two element internals.For the ordinary skill in the art, can understand as the case may be the concrete meaning of above-mentioned term in the utility model.
In the utility model, unless otherwise clearly defined and limited, First Characteristic Second Characteristic it " on " or D score can comprise that the first and second features directly contact, also can comprise that the first and second features are not directly contacts but contact by the other feature between them.And, First Characteristic Second Characteristic " on ", " top " and " above " comprise First Characteristic directly over Second Characteristic and oblique upper, or only represent that First Characteristic level height is higher than Second Characteristic.First Characteristic Second Characteristic " under ", " below " and " below " comprise First Characteristic under Second Characteristic and tiltedly, or only represent that First Characteristic level height is less than Second Characteristic.
Aspect one of the present utility model, the utility model proposes a kind of Muffle furnace, below with reference to Fig. 1-3 pair Muffle furnace of the present utility model, be described in detail.
According to an embodiment of the present utility model, this Muffle furnace can comprise: body of heater 10, refractory masses 20, heating element heater 30 and cooling water tank 40.According to specific embodiment of the utility model, in body of heater 10, be limited with furnace chamber 50, the opened top of furnace chamber 50, furnace chamber 50 is provided with air inlet 51, air hatch (not shown) and exhaust opening 52, and body of heater 10 is provided with fire door 11; Refractory masses 20 is located in furnace chamber 50 and is positioned at the top of furnace chamber 50; Heating element heater 30 extend into downwards in furnace chamber 50 through refractory masses 20; Cooling water tank 40 is located at heating element heater 30 tops and adjacent heating element 30, between cooling water tank 40 and the top of body of heater 10, has predetermined gap, is filled with fine sand layer in gap.According to specific embodiment of the utility model, Muffle furnace body of heater 10 belows are provided with base 60, and base 60 limits certain space, in this space, can be provided with electric control gear 61.The cooling water tank that place at the top of this Muffle furnace, can take away hanging on the one hand at the heating element heater liberated heat of furnace roof, can cover on the other hand furnace roof top and make extraneous isolated with burner hearth.Cooling water tank one side is provided with water inlet, and opposite side is provided with delivery port, is connected on the pipeline of delivery port thermometer can be installed, and is used for detecting coolant-temperature gage, and leaving water temperature requires to be no more than 50 degrees Celsius, thus the temperature in furnace chamber 50 is regulated and controled.This Muffle furnace can effectively be simulated rotary hearth furnace, comprises that heating mode, top mode of heating, reduction are that the erosion-resistant refractory disc of anti-slag, top arrange indirect water-cooling case, can pass into gas construction furnace atmosphere etc. with container.Also indirectly provide a kind of this Muffle furnace that utilizes in rotary hearth furnace pilot scale or the test method of producing greatly front simulation rotary hearth furnace simultaneously, comprised batching, reduction temperature curve, recovery time, fabric thickness simulation, reducing atmosphere simulation etc.By the basic test of simulation rotary hearth furnace reduction, to further instruct rotary hearth furnace pilot scale and production, avoid taking an unnecessary way when rotary hearth furnace pilot scale or suitability for industrialized production thus, and can directly carry out rotary hearth furnace clean smelting on a large scale according to the parameter of basic test.
According to an embodiment of the present utility model, between this refractory masses 20 and the bottom surface of cooling water tank 40, can be provided with support 70, heating element heater 30 can be hung on support 70.By the fixing heating element heater of support, adopt thus top radiation heating mode, can effectively simulate the radiation heating mode that rotary hearth furnace burner jets out flames, during for rotary hearth furnace pilot scale and production, provide valuable reference, reduce the number of times of adjusting technological parameter on rotary hearth furnace.
According to an embodiment of the present utility model, the shape of this heating element heater 30 is also not particularly limited, and according to specific embodiment of the utility model, this heating element heater 30 can be for U-shaped, and be fixed on support 70 by clip.Adopt thus this U-shaped heating element heater, can significantly increase the swept area of simulated experiment, to can better simulate rotary hearth furnace reduction state.
According to an embodiment of the present utility model, on the madial wall of furnace chamber 20, can be provided with bearing (not shown), refractory masses 20, support 70 and cooling water tank 40 are supported on respectively on bearing (not shown).
According to an embodiment of the present utility model, the particular type of heating element heater 30 is also not particularly limited, and according to specific embodiment of the utility model, this heating element heater 30 can be Si-Mo rod or carbon-point.The mode of heating of this Muffle furnace is different from the mode of heating of the inner both sides of the burner hearth heating element heater of conventional Muffle furnace completely, but relies on the heating element heater at top to heat, and in burner hearth, the temperature of furnace gas is the highest can be heated to 1800 ℃.Can effectively simulate rotary hearth furnace reduction state thus, to guarantee energy the whole nine yards when rotary hearth furnace pilot scale and production, or reduce the number of times of adjusting technological parameter on rotary hearth furnace.
According to an embodiment of the present utility model, distance between the bottom surface of the lower end of heating element heater 30 and furnace chamber 50 is also not particularly limited, according to specific embodiment of the utility model, the distance between the lower end of heating element heater 30 and the bottom surface of furnace chamber 50 can be 180～220mm.
According to an embodiment of the present utility model, this Muffle furnace can also comprise the smoke evacuation deduster 80 being connected with exhaust opening 53.According to specific embodiment of the utility model, in this smoke evacuation deduster 80, be provided with filter membrane 81.While containing the pelletizings such as potassium, sodium, lead, zinc when reduction, in the flue gas that stove is discharged, contain these metallic elements, when flue gas passes through filter membrane, these elements are filtered to be held back, enter subsequently the expansion chamber that is connected with cold wind, in expansion chamber, these elements are oxidized to oxide, desirablely during off-test go out filter membrane 81 and chemically examine, and analyze flue dust composition.
According to an embodiment of the present utility model, the air inlet 51 of this furnace chamber 50 comprises nitrogen inlet 511, hydrogen inlet 512 and carbon monoxide entrance 513.When carrying out rotary hearth furnace simulated test, first checkout facility electrical connection, whether cooling water tank connection leaks, and whether protective gas connection leaks gas, and whether intactly purges air inlet pipe connection, and whether the sand amount of top sand seal groove is enough, and whether seal suitable.Connect device power supply (DPS); Press power knob, now instrument powers on, and checks that whether thermometer and pressure gauge reading be normal, setting completed for pressure controller table upward pressure parameter, after checking that confirmation is errorless, starts instrument operation button, air-introduced machine automatically starts and enters duty, maintains negative pressure state in stove.Open N
2purge valve and carry out N
2purge, from being arranged on the air hatch at stove rear portion, by airbag extracting gases, detect online at random, to O
2content is zero.Heating schedule simulation rotary hearth furnace is set material is carried out to subregion heating, when temperature reaches predetermined value, the refractory disc that is preheating to 800 ℃～900 ℃ is taken out from other heating furnace, carbonaceous pelletizing is laid in refractory disc, and rapidly refractory disc is placed in stove and is reduced, open the H of stove one side simultaneously
2air intake valve or CO air intake valve, guarantee in stove it is strong reducing property atmosphere with this, and now carbonaceous pelletizing starts to carry out heat reduction according to the heating curve of setting.When setting the recovery time while finishing, take out the pelletizing after reduction, then pelletizing is carried out to hot charging molten minute, cooling direct sample preparation or cooling after carry out carrying out the test of lower road after mill ore magnetic selection separation.Can effectively simulate rotary hearth furnace reduction state thus, to guarantee energy the whole nine yards when rotary hearth furnace pilot scale and production, or reduce the number of times of adjusting technological parameter on rotary hearth furnace.
According to an embodiment of the present utility model, the gap size between cooling water tank 40 and the top of body of heater 10 is also not particularly limited, and according to specific embodiment of the utility model, the gap between this cooling water tank 40 and the top of body of heater 10 can be 20mm.In this gap, fill fine sand, can effectively completely cut off air, can play heat insulation effect again simultaneously.Body of heater can reach better heat insulation effect thus, to can effectively simulate rotary hearth furnace reduction state.
In the description of this description, the description of reference term " embodiment ", " some embodiment ", " example ", " concrete example " or " some examples " etc. means to be contained at least one embodiment of the present utility model or example in conjunction with specific features, structure, material or the feature of this embodiment or example description.In this manual, the schematic statement of above-mentioned term is not necessarily referred to identical embodiment or example.And the specific features of description, structure, material or feature can be with suitable mode combinations in any one or more embodiment or example.
Although illustrated and described embodiment of the present utility model above, be understandable that, above-described embodiment is exemplary, can not be interpreted as restriction of the present utility model, those of ordinary skill in the art can change above-described embodiment in the situation that not departing from principle of the present utility model and aim in scope of the present utility model, modification, replacement and modification.
Claims (10)
1. a Muffle furnace, is characterized in that, comprising:
Body of heater, is limited with furnace chamber in described body of heater, the opened top of described furnace chamber, and described furnace chamber is provided with air inlet, air hatch and exhaust opening, and described body of heater is provided with fire door;
Refractory masses, described refractory masses is located in described furnace chamber and is positioned at the top of furnace chamber;
Heating element heater, described heating element heater extend into downwards in described furnace chamber through described refractory masses;
Cooling water tank, described cooling water tank is located at described heating element heater top and contiguous described heating element heater, between described cooling water tank and the top of described body of heater, has predetermined gap, is filled with fine sand layer in described gap.
2. Muffle furnace according to claim 1, is characterized in that, between described refractory masses and the bottom surface of described cooling water tank, is provided with support, and described heating element heater hanging is on described support.
3. Muffle furnace according to claim 2, is characterized in that, described heating element heater is U-shaped, and is fixed on described support by clip.
4. Muffle furnace according to claim 2, is characterized in that, the madial wall of described furnace chamber is provided with bearing, and described refractory masses, described support and described cooling water tank are supported on respectively on described bearing.
5. Muffle furnace according to claim 1, is characterized in that, described heating element heater is Si-Mo rod or carbon-point.
6. Muffle furnace according to claim 1, is characterized in that, the distance between the lower end of described heating element heater and the bottom surface of described furnace chamber is 180～220mm.
7. Muffle furnace according to claim 1, is characterized in that, also comprises the smoke evacuation deduster being connected with described exhaust opening.
8. Muffle furnace according to claim 7, is characterized in that, in described smoke evacuation deduster, is provided with filter membrane.
9. Muffle furnace according to claim 7, is characterized in that, described air inlet comprises nitrogen inlet, hydrogen inlet and carbon monoxide entrance.
10. Muffle furnace according to claim 1, is characterized in that, described gap is 20mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320621109.8U CN203550520U (en) | 2013-10-09 | 2013-10-09 | Muffle furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320621109.8U CN203550520U (en) | 2013-10-09 | 2013-10-09 | Muffle furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203550520U true CN203550520U (en) | 2014-04-16 |
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ID=50468628
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320621109.8U Expired - Fee Related CN203550520U (en) | 2013-10-09 | 2013-10-09 | Muffle furnace |
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| Country | Link |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111334672A (en) * | 2020-03-09 | 2020-06-26 | 西格马(河南)高温科技集团有限公司 | Energy-saving magnesium purification device and purification process thereof |
-
2013
- 2013-10-09 CN CN201320621109.8U patent/CN203550520U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111334672A (en) * | 2020-03-09 | 2020-06-26 | 西格马(河南)高温科技集团有限公司 | Energy-saving magnesium purification device and purification process thereof |
| CN111334672B (en) * | 2020-03-09 | 2024-08-06 | 西格马(河南)高温科技集团有限公司 | Energy-saving magnesium purification device and purification process thereof |
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Address after: 102200 Beijing city Changping District Machi Town cow Road No. 18 Patentee after: Shenwu Technology Group Co.,Ltd. Address before: 102200 Beijing city Changping District Machi Town cow Road No. 18 Patentee before: BEIJING SHENWU ENVIRONMENT AND ENERGY TECHNOLOGY Co.,Ltd. |
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| CP01 | Change in the name or title of a patent holder | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: High-temperature muffle furnace nine-time thermometry Effective date of registration: 20180307 Granted publication date: 20140416 Pledgee: Bank of Nanjing Limited by Share Ltd. Beijing branch Pledgor: Shenwu Technology Group Co.,Ltd. Registration number: 2018990000177 |
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