CN201276588Y - Environment friendly energy-saving reducing smelting furnace for secondary metal - Google Patents
Environment friendly energy-saving reducing smelting furnace for secondary metal Download PDFInfo
- Publication number
- CN201276588Y CN201276588Y CNU2008200705464U CN200820070546U CN201276588Y CN 201276588 Y CN201276588 Y CN 201276588Y CN U2008200705464 U CNU2008200705464 U CN U2008200705464U CN 200820070546 U CN200820070546 U CN 200820070546U CN 201276588 Y CN201276588 Y CN 201276588Y
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- Prior art keywords
- heater
- furnace
- smelting furnace
- smelting
- environment
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- Expired - Lifetime
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- 238000003723 Smelting Methods 0.000 title claims abstract description 29
- 239000002184 metal Substances 0.000 title claims abstract description 18
- 229910052751 metal Inorganic materials 0.000 title claims abstract description 18
- 238000003756 stirring Methods 0.000 claims abstract description 27
- 238000011084 recovery Methods 0.000 claims abstract description 10
- 238000007789 sealing Methods 0.000 claims abstract description 10
- 239000003500 flue dust Substances 0.000 claims description 27
- 239000000428 dust Substances 0.000 claims description 12
- 238000003860 storage Methods 0.000 claims description 12
- 238000001816 cooling Methods 0.000 claims description 10
- 238000006477 desulfuration reaction Methods 0.000 claims description 10
- 238000011068 loading method Methods 0.000 claims description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 10
- 150000002739 metals Chemical class 0.000 claims description 9
- 230000001172 regenerating effect Effects 0.000 claims description 9
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 7
- 239000003546 flue gas Substances 0.000 claims description 7
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 239000000463 material Substances 0.000 abstract description 13
- 238000000034 method Methods 0.000 abstract description 9
- 230000008569 process Effects 0.000 abstract description 9
- 238000006243 chemical reaction Methods 0.000 abstract description 8
- 238000011049 filling Methods 0.000 abstract description 6
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 238000001556 precipitation Methods 0.000 abstract description 4
- 239000002912 waste gas Substances 0.000 abstract description 4
- 239000004071 soot Substances 0.000 abstract 2
- 238000005338 heat storage Methods 0.000 abstract 1
- 238000002844 melting Methods 0.000 description 8
- 230000008018 melting Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 6
- 239000002893 slag Substances 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 238000007599 discharging Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- -1 ferrous metals Chemical class 0.000 description 2
- 239000007789 gas Substances 0.000 description 2
- 239000002245 particle Substances 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 description 1
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000002920 hazardous waste Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000000247 postprecipitation Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000008929 regeneration Effects 0.000 description 1
- 238000011069 regeneration method Methods 0.000 description 1
- 239000004576 sand Substances 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 239000000779 smoke Substances 0.000 description 1
- 208000011580 syndromic disease Diseases 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- Manufacture And Refinement Of Metals (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model relates to a secondary metal environmental-protection energy-saving reduction smelting furnace, belonging to the smelting unit for smelting nonferrous metal. The smelting furnace comprises a furnace body, a stirring device, a waste gas treatment device and a soot recovery device, and a flame-passing path is connected between at least two furnace bodies; a gate and a filling machine are arranged at the upper end of the furnace body, and a stirring device is arranged at the upper end of the furnace body, and the waste gas treatment device and the soot recovery device are arranged at the side parts of the furnace body. The furnace has the advantages that: firstly, precipitation smelting and reaction smelting are carried out in one furnace, thus improving product quality and improving the recovery efficiency; secondly, heat storage function and heat circulation are used alternately, and the heat utilization rate is high; thirdly, mechanical operation in the whole process is carried out for greatly improving the output per unit time; fourthly, the multichamber structure and hot air combustion-supporting process greatly reduce energy consumption; fifthly, the fully mechanical operation greatly reduces labor intensity of workers; sixthly, material is filled from the top of the furnace, the speed is rapid, thus improving the production efficiency of the device, and material filling is carried out under sealing condition, thus protecting the operation environment of workers.
Description
Technical field
The utility model relates to a kind of non-ferrous metals such as secondary lead, scrap battery regeneration, tin sand that are applied to, the melting equipment of reduction, melting non-ferrous metal, particularly a kind of environment-protecting energy-saving reducing smelting furnace for regenerating metals.
Background technology
At present, secondary metal reducing and smelting furnace international, domestic use has two classes according to the principle branch:
1, precipitation melting is as the tunnel reverberatory furnace etc.; Tunnel reverberatory furnace, body of heater are tunnel type, and most lead, slag are put in the another side in the hand-fed of the side of body of heater, an end burning the other end combustion gas of body of heater, and the spent air temperture of discharging does not have mechanical whipping appts up to 1100 ℃; Tunnel reverberatory furnace thermo-efficiency is low, makes that 80% calorific loss falls.
2, smelting is as rotary furnace; Rotary furnace is the cartridge type body of heater of a horizontal revolving, the end blowing that feeds in raw material, the other end burning and discharging flue gas, or an end reinforced in the middle of blowing, no waste heat recovery.Strengthened material reaction because of back and forth rotating, but the sedimentation function reduction needs other preparation electrothermal front bed to finish precipitin reaction, even so, contains the valency metal in the slag up to more than 5～10%.The statement of Italy Mei Luoni design corporation can be reduced to 4%.
The rotary furnace that secondary lead retailoring is used is because of to-and-fro movement melting on rotary-type supporting mass, because of load-bearing has high requirements to support, so production capacity is lower.Revolution reaction is better than reverberatory furnace but can't realizes the plumbous better layering of slag, makes the leaded height of waste, and direct yield is low, because of structures shape " weak point " can't make full use of heat.In the U.S., its smelting slag is classified as " Hazardous wastes " because of leaded height by environmental administration must can abandon it through secondary treatment.
More than two kind equipments because structural reason, all exist open reinforced and flue dust can only return shortcoming in the stove indirectly, make the material spread of particles in surrounding environment, environment is had considerable influence, and all be difficult for realizing entire mechanization operation, poor working environment in the production process.
The utility model content
The purpose of this utility model is to provide a kind of: high efficiency, save the energy, protection environment, reduce pollute, environment-protecting energy-saving reducing smelting furnace for regenerating metals that the metal direct yield is high.
The purpose of this utility model is achieved in that this smelting furnace includes body of heater, whipping appts, emission-control equipment and flue dust retrieving arrangement, and body of heater has two at least, is connected with quirk between the body of heater; In the body of heater upper end gate and charging machine are arranged; Whipping appts is positioned at the upper end of body of heater, and emission-control equipment and flue dust retrieving arrangement are positioned at the sidepiece of body of heater.
The top of described body of heater is the ball top, and the bottom is right cylinder or polygonal body, and combustion unit is arranged in body of heater.
Described whipping appts includes support, stirrer and stirring rake, and support is positioned at the upper end of body of heater mouth, and stirrer has stir shaft, there is stirring rake lower end at stir shaft, and stirrer is connected on the support, in the lower end of support sealer is arranged, sealer is connected with the body of heater mouth, and stir shaft passes sealer.
Described sealer is the water-lute device; Perhaps sealer has seal closure and flue gas sealing plate.
Described emission-control equipment comprises that suspended hood, pipeline, pulse dust collector, water drench cooling tower, cyclone desulfuration tower and takes off circulatory pool, suspended hood was positioned at the top of quirk, suspended hood drenches cooling tower by pipeline with pulse dust collector and water and is connected, pulse dust collector is connected with the cyclone desulfuration tower by blower fan, and the cyclone desulfuration tower is connected with the desulphurization circulating pond.
Described flue dust retrieving arrangement has storage tank, worm conveyor, lift, flue dust handling machinery, unloading valve and loading hopper, the bottom of storage tank is connected with the flue dust handling machinery by worm conveyor, lift, be connected with unloading valve on the flue handling machinery, unloading valve is positioned at the top of body of heater or the top of charging machine, loading hopper is arranged below unloading valve, loading hopper is connected with body of heater, and the flue dust recovery channel is connected with interchanger, and the other end is connected to the upper end of storage tank.
Beneficial effect: owing to adopted such scheme, when a body of heater is implemented heating, high-temperature flue gas enters in second body of heater or in a plurality of body of heater by the quirk of crossing between the body of heater, the not intravital material of stove of heating that communicates is carried out preheating, utilize the intravital waste heat of process furnace to other the not intravital material realization of process furnace one-level heat exchange, heating furnace body is implemented the secondary heat exchange to heating furnace body not again from kiln gas, preheated-combustion-supporting wind reaches more than 450 ℃, whipping appts is all arranged on each heating furnace body, each whipping appts seals by the water-lute device, has strengthened the bath reaction; To finish reaction and post precipitation two Room or multicell material full and melted when a Room, switches heating two Room or multicell immediately, and 80 kilograms of/ton plumbous coals of marking of energy consumption have been saved the energy greatly; The production capacity height can reach more than 150 tons/day high efficiency; Be dosed into the product output from product, all the sealing disposable the finishing of body of heater, negative-pressure sealed type input and output material in the working process, the sealing of dedusting powder is returned in the stove, smokelessly, pollution-free, the waste gas that produces is handled back discharge up to standard through emission-control equipment, and any waste gas of space drainage, refuse have not towards periphery been protected environment, reduced pollution; Finish precipitation melting and smelting on an equipment simultaneously, reaction is strengthened in the airtight stirring of mechanical negative pressure, and smelting slag is leaded to have improved quality product below 1.5%, has improved the direct yield of metal again, has reached the purpose of this utility model.
Advantage: 1, precipitation melting and smelting are concentrated in the stove and carry out, both improved quality product, direct yield is improved.2, transmit variation because of round body of heater and ball roof construction make at the intravital heat of stove, the cycle alternation of heat accumulation function and heat uses and has overcome the low shortcoming of two class stove heat utilization efficiencies.Thereby, overcome prior art because of the structural shortcoming that can't realize high production capacity 3, because of the outer characteristic moving in quiet of multi-stove bodies structure and body of heater and be equipped with the entire mechanization operation and improved yield of unit time greatly.4, multicell structure of the present utility model and hot blast combustion-supporting technology greatly reduce energy consumption, have overcome the high shortcoming of prior art energy consumption.5, on floor space seldom and be easy to realize Fully-mechanized operation, greatly reduce labor strength.6, adopt airtight negative pressure feeding and stirring, from top filling, speed is fast, improves production efficiency of equipment.Whole process is carried out under air-tight state simultaneously, has avoided the material spread of particles in workshop air, has both protected workman's operating environment, has reduced labor strength simultaneously.
Description of drawings
Fig. 1 is the structure iron of the utility model smelting furnace.
Fig. 2 is the plan structure figure of Fig. 1.
Embodiment
Embodiment 1: among the figure, and 1, body of heater; 2, stirrer; 3, stirring rake; 4, stir shaft; 5, gate hoist; 6, charging machine; 7, lift; 8, seal closure; 9, support; 10, storage tank; 11, flue dust recovery channel; 12, flue dust transfer roller; 13, flue dust lift; 14, unloading valve; 15, flue dust handling machinery; 16, cross quirk; 17, heat recovery steam generator; 18, interchanger; 19 suspended hoods; 20, water drenches cooling tower; 21, pulse dust collector; 22, blower fan; 23, cyclone desulfuration tower; 24, desulphurization circulating pond.
This smelting furnace includes body of heater, whipping appts, emission-control equipment and flue dust retrieving arrangement, and body of heater has two at least, is connected with quirk between the body of heater; In the body of heater upper end gate and charging machine are arranged; Whipping appts is positioned at the upper end of body of heater, and emission-control equipment and flue dust retrieving arrangement are positioned at the sidepiece of body of heater.Gate is connected with gate hoist; Charging machine is a worm conveyor, and gate hoist and charging machine lay respectively at the both sides of whipping appts.Crossing the vapour generator that has surplus heat on the quirk, interchanger is arranged on the heat recovery steam generator, the pipeline of flue dust retrieving arrangement is connected with the output terminal of pulse dust collector, drenches cooling tower by water and is connected with storage tank with interchanger.
The top of described body of heater is the ball top, and the bottom is right cylinder or polygonal body, and combustion unit is arranged in body of heater.
Described whipping appts includes support, stirrer, stirring rake and lift, support is positioned at the upper end of body of heater mouth, stirrer has stir shaft, there is stirring rake lower end at stir shaft, stirrer is connected on the support by lift, there is sealer lower end at support, and sealer is connected with the body of heater mouth, and stir shaft passes sealer.
Described sealer is the water-lute device.
Described emission-control equipment comprises that suspended hood, pipeline, pulse dust collector, water drench cooling tower, cyclone desulfuration tower and takes off circulatory pool, suspended hood was positioned at the top of quirk, suspended hood drenches cooling tower by pipeline with pulse dust collector and water and is connected, pulse dust collector is connected with the cyclone desulfuration tower by blower fan, and the cyclone desulfuration tower is connected with the desulphurization circulating pond.
Described flue dust retrieving arrangement has storage tank, worm conveyor, lift, flue dust handling machinery, unloading valve and loading hopper, the bottom of storage tank is connected with the flue dust handling machinery by worm conveyor, lift, be connected with unloading valve on the flue handling machinery, unloading valve is positioned at the top of body of heater or the top of charging machine, loading hopper is arranged below unloading valve, loading hopper is connected with body of heater, and the flue dust recovery channel is connected with interchanger, and the other end is connected to the upper end of storage tank.
This smelting furnace equipment specifically comprises:
1. furnace binding can be two chambers or multicell, and every chamber can be circular, Polygons or other.All there is the combustion unit preheating every chamber, and reinforced, technological processs such as melting can cross exchanged.Realize the multistage exchange utilization of heat energy, to reach energy-conservation purpose.Be called for short by " two chambers or compartment furnace ", every chamber is generally right cylinder, top ball top, and passage overdoes between chamber and the chamber
2. mechanized charging under the dynamic full closeding state of feeding device, be embodied in duplex, sealing, top filling, material at first enters the loading hopper of charging machine, open reinforced gate, start charging machine, duplex with material advance in the boiler roof sealing bell jar, material opens the flue gas sealing plate automatically and enters in the stove under spiral thrust, the reinforced end, sealing plate cuts out automatically, and whole process does not have useless flue gas and overflows.Make the combustion-supporting wind-warm syndrome can be up to more than 450 ℃
3. the totally-enclosed mechanize of whipping appts high temperature is stirred.Start agitator arm and move downwards when material melting need stir, open the stirring system air cooling equipment simultaneously, make agitator arm be in low-temperature condition, promptly agitator arm produces the cooling slag blanket, protection agitator arm and stirring arm after entering the molten bath.The startup rotary knob carries out stirring operation after going deep into the molten bath certain depth.Agitator arm enters body of heater by water seal arrangement and stirs, and operation is finished rear stirrer and resetted.The entire operation process is finished automatically and furnace gas can't be overflowed.The support stirrer is positioned at top filling mouth upper end, is convenient to strengthen reaction process.In the support lower end water-lute device is arranged, carry out high-temperature machinery by water seal arrangement and stir.
4. flue dust reclaims whole smoke dusts by the automatic Returning smelting stove of flue dust retrieving arrangement.The dust collecting system flue dust enters the top filling bucket by airtight unloading valve, worm conveyor, lift, storage tank, then according to Returning smelting stove after 2. feeding device is operated.
Embodiment 2: body of heater has a plurality of, and is hexagon; Sealer has seal closure and flue gas sealing plate.Other and embodiment 1 omit together.
Claims (6)
1, a kind of environment-protecting energy-saving reducing smelting furnace for regenerating metals is characterized in that: this smelting furnace includes body of heater, whipping appts, emission-control equipment and flue dust retrieving arrangement, and body of heater has two at least, is connected with quirk between the body of heater; In the body of heater upper end gate and charging machine are arranged; Whipping appts is positioned at the upper end of body of heater, and emission-control equipment and flue dust retrieving arrangement are positioned at the sidepiece of body of heater.
2, environment-protecting energy-saving reducing smelting furnace for regenerating metals according to claim 1 is characterized in that: the top of described body of heater is the ball top, and the bottom is right cylinder or polygonal body, and combustion unit is arranged in body of heater.
3, environment-protecting energy-saving reducing smelting furnace for regenerating metals according to claim 1, it is characterized in that: described whipping appts includes support, stirrer and stirring rake, support is positioned at the upper end of body of heater mouth, stirrer has stir shaft, there is stirring rake lower end at stir shaft, and stirrer is connected on the support, in the lower end of support sealer is arranged, sealer is connected with the body of heater mouth, and stir shaft passes sealer.
4, environment-protecting energy-saving reducing smelting furnace for regenerating metals according to claim 1 is characterized in that: described sealer is the water-lute device; Perhaps sealer has seal closure and flue gas sealing plate.
5, environment-protecting energy-saving reducing smelting furnace for regenerating metals according to claim 1, it is characterized in that: described emission-control equipment comprises that suspended hood, pipeline, pulse dust collector, water drench cooling tower, cyclone desulfuration tower and takes off circulatory pool, suspended hood was positioned at the top of quirk, suspended hood drenches cooling tower by pipeline with pulse dust collector and water and is connected, pulse dust collector is connected with the cyclone desulfuration tower by blower fan, and the cyclone desulfuration tower is connected with the desulphurization circulating pond.
6, environment-protecting energy-saving reducing smelting furnace for regenerating metals according to claim 1, it is characterized in that: described flue dust retrieving arrangement has storage tank, worm conveyor, lift, flue dust handling machinery, unloading valve and loading hopper, the bottom of storage tank is connected with the flue dust handling machinery by worm conveyor, lift, be connected with unloading valve on the flue handling machinery, unloading valve is positioned at the top of body of heater or the top of charging machine, loading hopper is arranged below unloading valve, loading hopper is connected with body of heater, the flue dust recovery channel is connected with interchanger, and the other end is connected to the upper end of storage tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200705464U CN201276588Y (en) | 2008-05-08 | 2008-05-08 | Environment friendly energy-saving reducing smelting furnace for secondary metal |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200705464U CN201276588Y (en) | 2008-05-08 | 2008-05-08 | Environment friendly energy-saving reducing smelting furnace for secondary metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201276588Y true CN201276588Y (en) | 2009-07-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200705464U Expired - Lifetime CN201276588Y (en) | 2008-05-08 | 2008-05-08 | Environment friendly energy-saving reducing smelting furnace for secondary metal |
Country Status (1)
| Country | Link |
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| CN (1) | CN201276588Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102125997A (en) * | 2010-11-12 | 2011-07-20 | 吴江市森泰机械制造有限公司 | Roasting furnace |
| CN102679728A (en) * | 2012-05-18 | 2012-09-19 | 株洲金鼎高端装备有限公司 | Energy-saving environment-friendly type smelting furnace |
| CN111721114A (en) * | 2020-06-30 | 2020-09-29 | 重庆德能再生资源股份有限公司 | Lead button and lead plaster smelting reduction device |
| CN111719048A (en) * | 2020-06-30 | 2020-09-29 | 重庆德能再生资源股份有限公司 | Lead refining recovery system |
-
2008
- 2008-05-08 CN CNU2008200705464U patent/CN201276588Y/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102125997A (en) * | 2010-11-12 | 2011-07-20 | 吴江市森泰机械制造有限公司 | Roasting furnace |
| CN102679728A (en) * | 2012-05-18 | 2012-09-19 | 株洲金鼎高端装备有限公司 | Energy-saving environment-friendly type smelting furnace |
| CN102679728B (en) * | 2012-05-18 | 2014-03-26 | 株洲金鼎高端装备有限公司 | Energy-saving environment-friendly type smelting furnace |
| CN111721114A (en) * | 2020-06-30 | 2020-09-29 | 重庆德能再生资源股份有限公司 | Lead button and lead plaster smelting reduction device |
| CN111719048A (en) * | 2020-06-30 | 2020-09-29 | 重庆德能再生资源股份有限公司 | Lead refining recovery system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU NEW CHUNXING RESOURCE RECYCLING LLC Free format text: FORMER OWNER: YANG CHUNMING Effective date: 20150706 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20150706 Address after: 221300 circular economy industrial park, Pizhou, Jiangsu province (West of Huo Lian highway, west of Jian Qiu River) Patentee after: JIANGSU NEW CHUNXING RESOUORCE RECYCLING CO., LTD. Address before: 221300 South Jiangsu province Pizhou City Peng bridge Jiangsu Chunxing alloy (Group) Co., Ltd. Patentee before: Yang Chunming |
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| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170717 Address after: 221300 circular economy industrial park, Pizhou, Jiangsu province (West of Huo Lian highway, west of Jian Qiu River) Patentee after: Yang Chunming Address before: 221300 circular economy industrial park, Pizhou, Jiangsu province (West of Huo Lian highway, west of Jian Qiu River) Patentee before: JIANGSU NEW CHUNXING RESOUORCE RECYCLING CO., LTD. |
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| 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: Environment-protecting energy-saving reducing smelting furnace for regenerating metals Effective date of registration: 20170718 Granted publication date: 20090722 Pledgee: Hebei Agricultural Bank of China Financial Leasing Co Pledgor: Yang Chunming Registration number: 2017990000647 |
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| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20090722 |
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| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Date of cancellation: 20201030 Granted publication date: 20090722 Pledgee: Hebei Agricultural Bank of China Financial Leasing Co. Pledgor: Yang Chunming Registration number: 2017990000647 |