CN103468939B - Cold-pressed pellet and preparation method thereof - Google Patents
Cold-pressed pellet and preparation method thereof Download PDFInfo
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- CN103468939B CN103468939B CN201310402320.5A CN201310402320A CN103468939B CN 103468939 B CN103468939 B CN 103468939B CN 201310402320 A CN201310402320 A CN 201310402320A CN 103468939 B CN103468939 B CN 103468939B
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- 238000002360 preparation method Methods 0.000 title claims abstract description 8
- 239000008188 pellet Substances 0.000 title abstract description 10
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 107
- 229910052742 iron Inorganic materials 0.000 claims abstract description 51
- SVPXDRXYRYOSEX-UHFFFAOYSA-N bentoquatam Chemical compound O.O=[Si]=O.O=[Al]O[Al]=O SVPXDRXYRYOSEX-UHFFFAOYSA-N 0.000 claims abstract description 18
- 238000002156 mixing Methods 0.000 claims abstract description 16
- 239000002699 waste material Substances 0.000 claims abstract description 14
- 239000000203 mixture Substances 0.000 claims abstract description 13
- 238000003825 pressing Methods 0.000 claims abstract description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 18
- 239000010959 steel Substances 0.000 claims description 18
- 150000001875 compounds Chemical class 0.000 claims description 17
- 238000005096 rolling process Methods 0.000 claims description 14
- 238000005453 pelletization Methods 0.000 claims description 9
- 238000001035 drying Methods 0.000 claims description 6
- 238000007493 shaping process Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 23
- 239000002994 raw material Substances 0.000 abstract description 12
- 239000000428 dust Substances 0.000 abstract description 9
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 239000010802 sludge Substances 0.000 abstract description 8
- 239000011230 binding agent Substances 0.000 abstract description 6
- 238000012360 testing method Methods 0.000 abstract description 6
- 239000000779 smoke Substances 0.000 abstract description 3
- 229910000278 bentonite Inorganic materials 0.000 abstract 2
- 239000000440 bentonite Substances 0.000 abstract 2
- 238000000465 moulding Methods 0.000 abstract 2
- 239000003921 oil Substances 0.000 description 20
- 238000005245 sintering Methods 0.000 description 6
- 230000006835 compression Effects 0.000 description 5
- 238000007906 compression Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 238000012545 processing Methods 0.000 description 3
- 238000004821 distillation Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- SZVJSHCCFOBDDC-UHFFFAOYSA-N ferrosoferric oxide Chemical compound O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 2
- 230000002829 reductive effect Effects 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 238000005406 washing Methods 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229910004298 SiO 2 Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 235000011941 Tilia x europaea Nutrition 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 238000013459 approach Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000007596 consolidation process Methods 0.000 description 1
- 238000009749 continuous casting Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003814 drug Substances 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000012208 gear oil Substances 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 239000004571 lime Substances 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 238000003801 milling Methods 0.000 description 1
- 230000000116 mitigating effect Effects 0.000 description 1
- 230000003020 moisturizing effect Effects 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
- 239000010698 whale oil Substances 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Landscapes
- Manufacture And Refinement Of Metals (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
The invention provides a cold-pressed pellet and a preparation method thereof, wherein the cold-pressed pellet comprises the following raw material components in percentage by weight: 9-26% of iron-containing oil sludge, 1-8% of bentonite and 70-90% of dust and mud waste. After iron-containing oil sludge and bentonite are uniformly mixed, the mixture is sufficiently and uniformly mixed with dust and sludge waste in a mixing mill, and the water content is controlled to be 6-15%; pressing and molding by a cold pressing molding machine, and naturally placing until the mixture is completely dried. The invention takes the iron-containing oil sludge and dust sludge waste as main raw materials, can recover iron resources, reduce the production cost of the cold-pressed pellets, reduce the using amount of the traditional binder, improve the grade of the pellets, and avoid the harm of concentrated volatilization of oil smoke to production equipment and environment when oil in a mixture is dried due to the preparation of sintered ore by using the oil sludge. The pellet prepared by the method has the advantages that the dry pellet compressive strength can reach more than 2700N, the 2 m high free drop test can reach more than 16 times, and the requirement of the metallurgical cold-pressed pellet strength is completely met.
Description
Technical field
The invention belongs to and smelt material technology field, particularly relate to a kind of coal-pressing ball and preparation method thereof.
Background technology
Iron and steel enterprise produces a large amount of iron-containing wastes every year, energy-saving and emission-reduction and resource circulation utilization is implemented in metallurgy industry, the ion dust mud contaning waste material produced in smelting, rolling process is fully utilized, produce coal-pressing ball and be used for blast furnace or converter, it is exactly very important behave, one ton of steel is often produced by the dirt mud of generation 10 ~ 15kg according to pertinent literature report, wherein part is in enterprises recycle, some could utilize or store up discarded after needing process because containing harmful ingredients, both resource was wasted, again to environment.Iron scale as billet surface when steel rolling and continuous casting can peel off under the effect of mechanical force and impact of water, and import whirling well after pouring trench, thinner iron scale is finally washed into horizontal sedimentation tank.Iron scale in settling tank is the iron content greasy filth that is otherwise known as because being mixed into milling train oil, gear oil, hydraulic efficiency oil and roller-way oil.
Ion dust mud contaning discharges by major part iron and steel enterprise, and ion dust mud contaning utilizes at sintering system by some iron and steel enterprises.But, have certain negative impact to sintering and ironmaking production.Such as, containing the greasy dirt of 2% ~ 5% in greasy filth, when sinter mixture is dry, oil volatilization causes the condensation and adhere to a large amount of dust and destroy the transient equilibrium of blower fan on fan rotor of oily vapour, reduce exerting oneself and the life-span of blower fan, not only affect the normal operation of production unit, but also naturally cause fire because the oil that spent air temperture is higher, burning-point is low hangs on blower fan, cause structure deteriorate, cause huge financial loss.
At present, existing oil-sludge treatment method is as follows:
1, as raw materials for sintering recycle method: be placed on dump by the greasy filth that part oil-containing in greasy filth is less and drench and remove portion of water, allocate agglomerate into improve the grade of agglomerate, but the method can cause dump environmental pollution, greasy filth can not be made again all to be utilized.
2, roasting method: carry out roasting in rotary kiln, although the method can obtain operable iron scale, consume a large amount of energy, and the oil smoke produced in production process can cause heavier secondary pollution to air.
3, distillation method: the moisture in greasy filth and oil content are evaporated away by the method for distillation, reclaim iron part and oil content, but the method will consume a large amount of energy, processing cost is higher;
4, extraction process: the method adopts chemical agent to be extracted by the oil in iron scale and Separation and Recovery, the major defect of this method is to need outer adding medicine, increase cost, and easily produces new water pollutions.
The article that what the people such as Deng Yuzhen delivered is entitled as " synthetical recovery of Oil-bearing Iron Slime in Waste Water of Hot Finish Rolling and utilization ", introduce the method by adding washing composition synthetical recovery hot finishing oil-containing iron mud and index, the application direction of the principle that surfactant is selected and influence factor and the rear product of recovery.Because needing additional washing composition, so production cost can be increased, also secondary pollution can be caused.
Patent disclosed in ten thousand little equality people " utilizing steel rolling greasy filth to produce the method for iron oxide black ", disclose a kind of method utilizing steel rolling greasy filth to produce iron oxide black, the principal feature of this method first greasy filth is put into stoving oven remove portion oil content, and iron slag is oxidized, then send into rotary kiln utilize the oil at high temperature cracking in material to produce hydrogen as reductive agent, make the ferriferous oxide Restore All in material become Z 250.The product that this method is produced, quality is not easily controlled, and but needs external heat source to heat it, consumes energy larger.
Calendar year 2001 Han Fenglin delivers the article being entitled as " producing reduced iron powder by steel scale of steel rolling ", systematically describes the technological process being produced reduced iron powder by iron scale, principle, and the performance comparison of various trade mark reduced iron powder.But it is comparatively complicated to produce reduced iron powder process, and reaction process is wayward, promotes and be subject to a definite limitation.
US Patent No. 4,326,883, " oil removing of steel rolling greasy filth and sintering " is introduced oil-containing steel scale of steel rolling and calcium lime powder mixed pelletizing, again drying, after special high temperature kiln roasting oil removing, is used as raw materials for sintering.Although the method can avoid steel rolling greasy filth directly as the pollution that raw materials for sintering causes air, need go up complicated greasy filth pre-processing device, processing cost is higher.
US Patent No. 5,885,328, " consolidation method of steel rolling greasy filth " describe with steel rolling greasy filth not the adding additives such as the iron scale of oil-containing or the blast furnace dust of carbon containing as raw material, control the moisture of compound and make green-ball, after green-ball drying, in rotary hearth furnace, preparing metallized pellet.The method facility investment is high, maintenance cost is high, and corresponding processing cost is also higher.
In sum, also there is no both at home and abroad that good cost is low up to now, the steel rolling oil-sludge treatment that do not produce secondary pollution and resource utilization reuse method.
Summary of the invention
The present invention aim to provide a kind of with iron content greasy filth and dirt mud waste material for main raw material, thus can reduce production cost, economize on resources, decreasing pollution, improves coal-pressing ball of pelletizing grade and preparation method thereof.
For this reason, the solution that the present invention takes is:
A kind of coal-pressing ball, its feed composition wt% content is:
Iron content greasy filth 9% ~ 26%, wilkinite 1% ~ 8%, dirt mud waste material 70% ~ 90%;
Described iron content greasy filth is steel rolling greasy filth;
Described dirt mud waste material is at least 2 kinds in converter dirt, gas ash, iron sheet, blast furnace ore tank ash.
A preparation method for coal-pressing ball, its concrete grammar is:
1, the iron content greasy filth after naturally drying and wilkinite are mixed in proportion.
2, the iron content greasy filth after mixing and wilkinite batch mixing are fully mixed into compound with the dirt mud waste material extracted in proportion in mixing pan, control compound water ratio 6% ~ 15%.
3, compound is sent into chilling press, make type at 180 ~ 260t pressure.
4, the pelletizing after shaping is placed more than 18h, naturally until parch completely.
Because self water ratio of iron content greasy filth is higher, so be first it naturally placed to dry in use, again according to practical situation moisturizing or continue to dry when mixing with other waste materials, control compound water ratio.Wherein wilkinite self also has cohesive action, but because of containing a large amount of Al
2o
3, SiO
2, the grade of pelletizing can be reduced, increase the quantity of slag, affect operation when entering blast furnace or converter, therefore should not use in a large number as binding agent separately.In iron content greasy filth, allocate a small amount of wilkinite into, be because iron content greasy filth is thicker, not easily mix, bentonitic adding can play certain mitigation.Here the binding agent prepared is due to containing certain greasy filth, so show good balling-up, the ball of coldmoulding is easy to the demoulding, and balling ratio is improved greatly.With the greasy filth of not de-oiling after drying, save facility investment and the de-oiling expense of the special deoiler of greasy filth, when ball processed, the oil in greasy filth serves the effect of binding agent, decreases the consumption of conventional binders, improves the grade of pelletizing.
Beneficial effect of the present invention is:
The present invention with iron content greasy filth and ion dust mud contaning waste material for main raw material prepares pelletizing, iron resources can be reclaimed, reduce the production cost of coal-pressing ball, save facility investment and the de-oiling expense of greasy filth deoiler, the consumption of very big minimizing conventional binders, improve the grade of pelletizing, avoid joining oil smoke when agglomerate causes the oil drying in compound with greasy filth and concentrate volatilization to the harm of production unit and environment.Use the pelletizing prepared of the present invention, dry bulb ultimate compression strength can reach more than 2700N, and 2 meters of high free fall tests can reach more than 16 times, reach the requirement of metallurgical cold-pressed pellets intensity completely, thus provides a new approach for recycling iron content greasy filth.
Embodiment
Embodiment 1:
First, iron content greasy filth is dried naturally, then will to account for raw material total amount wt% be that 10% iron content greasy filth and 5% wilkinite mix, form batch mixing.Then, revolving furnace mud 40%, gas ash 35%, iron sheet 10% are mixed 30 minutes with iron content greasy filth and wilkinite batch mixing to even, form compound, compound moisture control is 12%.Make type through chilling press at 200 tons of pressure again, naturally place 2 days afterwards, surveying its dry bulb ultimate compression strength after dry is 2790N, and 2 meters of high free fall tests are 18 times.
Embodiment 2:
Iron content greasy filth is dried naturally, then will to account for raw material total amount wt% be that 13% iron content greasy filth and 5% wilkinite mix, form batch mixing.Then, gas mud 33%, blast furnace ore tank ash 37%, iron sheet 12% are mixed 30 minutes with iron content greasy filth and wilkinite batch mixing to even, form compound, compound moisture control is 14%.Make type through chilling press at 240 tons of pressure, naturally placing 2 days dry rear its dry bulb ultimate compression strength of survey is afterwards 2860N, and 2 meters of high free fall tests are 21 times.
Embodiment 3:
Iron content greasy filth is dried naturally, then will to account for raw material total amount wt% be that 23% iron content greasy filth and 5% wilkinite mix, form batch mixing.Then, converter dirt 27%, blast furnace ore tank ash 25%, iron sheet 11%, gas mud 9% are mixed 30 minutes with iron content greasy filth and wilkinite batch mixing to even, form compound, compound moisture control is 8%.Make type through chilling press at 180 tons of pressure, naturally placing 2 days dry rear its dry bulb ultimate compression strength of survey is afterwards 2920N, and 2 meters of high free fall tests are 24 times.
Embodiment 4:
Iron content greasy filth is dried naturally, then will to account for raw material total amount wt% be that 18% iron content greasy filth and 2% wilkinite mix, form batch mixing.Then, revolving furnace mud 45%, blast furnace ore tank ash 35% are mixed 30 minutes to even with iron content greasy filth and wilkinite batch mixing, and form compound, compound moisture control is 11%.Make type through chilling press at 260 tons of pressure, naturally placing 2 days dry rear its dry bulb ultimate compression strength of survey is afterwards 3100N, and 2 meters of high free fall tests are 26 times.
Claims (2)
1. a coal-pressing ball, is characterized in that, its feed composition wt% content is:
Iron content greasy filth 9% ~ 26%, wilkinite 1% ~ 8%, dirt mud waste material 70% ~ 90%;
Described iron content greasy filth is steel rolling greasy filth;
Described dirt mud waste material is at least 2 kinds in converter dirt, gas ash, iron sheet, blast furnace ore tank ash.
2. a preparation method for coal-pressing ball according to claim 1, is characterized in that, concrete grammar is:
(1), the iron content greasy filth after naturally drying and wilkinite are mixed in proportion;
(2), by the iron content greasy filth after mixing and wilkinite batch mixing in mixing pan, be fully mixed into compound with the dirt mud waste material extracted in proportion, control compound water ratio 6% ~ 15%;
(3), by compound send into chilling press, make type at 180 ~ 260t pressure;
(4), by the pelletizing after shaping naturally more than 18h is placed, until parch completely.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310402320.5A CN103468939B (en) | 2013-09-06 | 2013-09-06 | Cold-pressed pellet and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310402320.5A CN103468939B (en) | 2013-09-06 | 2013-09-06 | Cold-pressed pellet and preparation method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103468939A CN103468939A (en) | 2013-12-25 |
| CN103468939B true CN103468939B (en) | 2016-02-24 |
Family
ID=49793978
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| CN201310402320.5A Active CN103468939B (en) | 2013-09-06 | 2013-09-06 | Cold-pressed pellet and preparation method thereof |
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Families Citing this family (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105177196A (en) * | 2015-10-08 | 2015-12-23 | 宝钢发展有限公司 | Iron-containing dust slime treatment process with heating conducted through coal gas and multi-frequency electricity in mixed mode |
| CN106435168A (en) * | 2016-11-29 | 2017-02-22 | 江苏省冶金设计院有限公司 | Method for preparing and reducing pellets |
| CN106435082A (en) * | 2016-11-29 | 2017-02-22 | 北京神雾环境能源科技集团股份有限公司 | System and method for treating iron-containing oily sludge |
| CN106399620A (en) * | 2016-11-29 | 2017-02-15 | 北京神雾环境能源科技集团股份有限公司 | System and method for treating iron-contained oil sludge |
| CN108660313B (en) * | 2017-03-29 | 2020-05-29 | 鞍钢股份有限公司 | Cold rolling acid sludge and alkali sludge neutralization technology and method for preparing blast furnace pellets from neutralization products |
| CN107699686B (en) * | 2017-09-08 | 2021-01-15 | 新疆八一钢铁股份有限公司 | Method for digesting waste mineral oil of iron and steel enterprises by using steelmaking process |
| CN108341570B (en) * | 2018-04-23 | 2023-12-05 | 鞍山缘友诚技术有限公司 | Pollution-free recycling treatment method and system for iron-containing oil sludge |
| CN109112297B (en) * | 2018-10-19 | 2020-08-28 | 攀钢集团攀枝花钢铁研究院有限公司 | Binder for forming converter enriched sludge and converter enriched sludge forming method |
| CN110699543B (en) * | 2019-11-22 | 2020-12-25 | 中南大学 | Method for preparing iron ore sintered pellet binder by using steel oily sludge, binder and application |
| CN112174470B (en) * | 2020-09-30 | 2023-05-23 | 宝钢湛江钢铁有限公司 | Treatment method of cold rolling oily sludge |
| CN113122711B (en) * | 2021-04-07 | 2022-04-01 | 中南大学 | Method for preparing solid organic/inorganic composite binder by using steel oily sludge, binder and application |
| CN114892006B (en) * | 2022-05-17 | 2024-06-18 | 宝武集团环境资源科技有限公司 | Method and system for treating oil-containing muddy water of steel rolling by rotary hearth furnace |
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| CN1537959A (en) * | 2003-10-23 | 2004-10-20 | 张玉山 | Cold aggregated pellet ore for ironmaking in blast furnace and its preparation method |
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-
2013
- 2013-09-06 CN CN201310402320.5A patent/CN103468939B/en active Active
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|---|---|---|---|---|
| US6682583B1 (en) * | 1999-05-21 | 2004-01-27 | Kabushiki Kaisha Kobe Seiko Sho | Process for producing sintered ore and the sintered ore |
| CN1537959A (en) * | 2003-10-23 | 2004-10-20 | 张玉山 | Cold aggregated pellet ore for ironmaking in blast furnace and its preparation method |
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| Title |
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Inventor after: Yu Shujuan Inventor after: Wang Xiangfeng Inventor after: Zhang Dakui Inventor after: Hou Hongyu Inventor after: Ma Guangyu Inventor after: Geng Jishuang Inventor after: Zhang Zhongzheng Inventor after: Zhang Xinyi Inventor after: Qian Feng Inventor after: Xu Pengfei Inventor before: Yu Shujuan Inventor before: Wang Xiangfeng Inventor before: Zhang Dakui Inventor before: Hou Hongyu Inventor before: Ma Guangyu Inventor before: Geng Jishuang Inventor before: Zhang Zhongzheng Inventor before: Zhang Xinyi Inventor before: Qian Feng Inventor before: Xu Pengfei |
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