CN107417072B - Device for producing foam glass by liquid blast furnace slag - Google Patents
Device for producing foam glass by liquid blast furnace slag Download PDFInfo
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- CN107417072B CN107417072B CN201710468711.5A CN201710468711A CN107417072B CN 107417072 B CN107417072 B CN 107417072B CN 201710468711 A CN201710468711 A CN 201710468711A CN 107417072 B CN107417072 B CN 107417072B
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- slag
- furnace
- blast furnace
- liquid
- alternating current
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- 239000002893 slag Substances 0.000 title claims abstract description 95
- 239000007788 liquid Substances 0.000 title claims abstract description 38
- 239000011494 foam glass Substances 0.000 title claims abstract description 15
- 239000000463 material Substances 0.000 claims abstract description 21
- 238000010891 electric arc Methods 0.000 claims abstract description 15
- 239000011819 refractory material Substances 0.000 claims abstract description 11
- 238000003723 Smelting Methods 0.000 claims abstract description 8
- 239000002994 raw material Substances 0.000 claims abstract description 6
- 229910052500 inorganic mineral Inorganic materials 0.000 claims abstract description 5
- 239000011707 mineral Substances 0.000 claims abstract description 5
- 238000009413 insulation Methods 0.000 claims description 12
- 238000000137 annealing Methods 0.000 claims description 9
- 238000001816 cooling Methods 0.000 claims description 9
- 238000009749 continuous casting Methods 0.000 claims description 8
- 239000004088 foaming agent Substances 0.000 claims description 7
- 239000002131 composite material Substances 0.000 claims description 6
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 5
- 229910052802 copper Inorganic materials 0.000 claims description 5
- 239000010949 copper Substances 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 4
- 229910052751 metal Inorganic materials 0.000 claims description 4
- 238000000034 method Methods 0.000 claims description 4
- 239000013589 supplement Substances 0.000 claims description 4
- RWDBMHZWXLUGIB-UHFFFAOYSA-N [C].[Mg] Chemical compound [C].[Mg] RWDBMHZWXLUGIB-UHFFFAOYSA-N 0.000 claims description 3
- ZFXVRMSLJDYJCH-UHFFFAOYSA-N calcium magnesium Chemical compound [Mg].[Ca] ZFXVRMSLJDYJCH-UHFFFAOYSA-N 0.000 claims description 3
- 238000003763 carbonization Methods 0.000 claims description 3
- 230000003137 locomotive effect Effects 0.000 claims description 3
- -1 mine tailings Substances 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 238000005266 casting Methods 0.000 claims description 2
- 239000000203 mixture Substances 0.000 claims description 2
- 230000001502 supplementing effect Effects 0.000 claims description 2
- 239000010883 coal ash Substances 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000002918 waste heat Substances 0.000 abstract description 4
- 238000004064 recycling Methods 0.000 abstract description 2
- 238000009991 scouring Methods 0.000 abstract description 2
- 239000002910 solid waste Substances 0.000 abstract description 2
- 239000000126 substance Substances 0.000 abstract description 2
- 238000005034 decoration Methods 0.000 abstract 1
- 239000003870 refractory metal Substances 0.000 description 7
- 238000000465 moulding Methods 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 239000004566 building material Substances 0.000 description 2
- 239000010881 fly ash Substances 0.000 description 2
- 239000011449 brick Substances 0.000 description 1
- 239000003245 coal Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 239000004570 mortar (masonry) Substances 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000010791 quenching Methods 0.000 description 1
- 230000000171 quenching effect Effects 0.000 description 1
- 238000011160 research Methods 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000007711 solidification Methods 0.000 description 1
- 230000008023 solidification Effects 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03B—MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
- C03B19/00—Other methods of shaping glass
- C03B19/08—Other methods of shaping glass by foaming
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C1/00—Ingredients generally applicable to manufacture of glasses, glazes, or vitreous enamels
- C03C1/002—Use of waste materials, e.g. slags
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Abstract
The invention discloses a device for producing foam glass by liquid blast furnace slag, which mainly comprises: the invention adopts blast furnace hot slag to produce foam glass, solves the problem of piling up blast furnace slag as solid waste, effectively utilizes the waste heat of the molten blast furnace slag, realizes the resource recycling of the molten blast furnace slag and improves the resource utilization rate; and the abundant mineral substances have excellent overall mechanical property through high-temperature smelting. The adoption of the furnace bottom slag overflow mode to provide high-temperature liquid slag ensures that the production line is continuously provided with slag raw materials with stable flow, temperature, components and viscosity, ensures that the production line produces high-standard and high-quality building decoration material products and lays a foundation, reduces the scouring of refractory materials of an electric arc furnace during feeding, and ensures the continuous service life of the refractory materials.
Description
Technical Field
The invention belongs to the field of waste resource utilization, relates to a comprehensive utilization technology of liquid blast furnace slag, and particularly relates to a device for producing foam glass by using liquid blast furnace slag.
Background
The foam glass is a light high-strength building material and decorative material with excellent heat insulation (cold insulation), sound absorption, moisture resistance and fire resistance, the use temperature range is 196 ℃ below zero to 450 ℃, the service life of A-grade non-combustible glass is the same as that of a building, and the moisture permeability coefficient is almost 0. Although other new heat insulating materials are in a variety of layers, foam glass plays an increasingly important role in the fields of low heat insulation, moisture-proof engineering, sound absorption and the like due to the permanence, safety and high reliability of the foam glass.
The liquid blast furnace slag has the temperature of more than 1400 ℃, is a good waste heat resource, and the waste heat of each ton of blast furnace slag is equivalent to the heat generated by the complete combustion of 60Kg of standard coal. The method develops the high additional utilization value of the blast furnace slag aiming at the molten sensible heat of the high-temperature liquid blast furnace slag, directly utilizes the liquid blast furnace slag, researches on the direct preparation of the foam glass by the liquid blast furnace slag, greatly improves the economic benefit, and effectively avoids the oxysulfide released by the blast furnace slag in the water quenching process.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a device for producing foam glass by liquid blast furnace slag, aiming at the defects of the prior art, the device mainly comprises a slag carrying tank 1, an intermediate slag tank 2, an alternating current arc furnace 3, a cooling tank 4, a stirrer 5 and a continuous casting machine 6, wherein the slag carrying tank 1 is mainly formed by taking liquid blast furnace slag from a slag outlet of the blast furnace by a locomotive and conveying the liquid blast furnace slag to the intermediate slag tank 2 positioned at the upper part of the alternating current arc furnace 3, the intermediate slag tank 2 slowly adds the liquid blast furnace slag into the alternating current arc furnace 3 through a slag inlet 321, mineral raw materials, mine tailings, fly ash and the like which are uniformly mixed according to a certain proportion are added through an auxiliary material inlet 322, the alternating current cooling tank 4 is heated to 1400 ℃ and ~ ℃, a foaming agent is added into the foaming agent inlet 41 and then flows out to the stirrer 5 to be stirred, the continuous casting molding is carried out by the continuous casting machine 6, annealing is carried out after the molding, the annealing is carried out, the annealing temperature is 550-600 ℃, the annealing time is 2-3 hours, the annealing is carried out, the annealing is mainly composed of a furnace body 31 and 32, the furnace body 31, the furnace body is formed by a three-part of a furnace body 31, a refractory metal-shaped electrode 33, a forked-shaped electrode 33, a refractory metal tamping furnace body 33 is formed by a refractory metal tamping furnace body 35, a forked-shaped electrode 33, a refractory metal tamping furnace body 35 electrode 33, a refractory metal tamping furnace body is arranged on a forked-shaped electrode 33, a refractory metal tamping furnace body 35-shaped electrode connected with a forked-shaped electrode, a fire-shaped electrode tamping furnace body insulated furnace bottom electrode tamping furnace body 35 electrode, a fire-shaped electrode tamping furnace body insulated furnace body 35 electrode tamping furnace top electrode tamping furnace bottom.
The three-phase alternating current electrodes 33 are respectively connected with the system power supply A \ B \ C three-phase electric furnace variable low-voltage sides.
The refractory electrode 332 is a conductive magnesium-carbon composite ramming material, and the resistivity after carbonization is less than or equal to 3 multiplied by 10-4Omega.m, volume density not less than 2.8g/cm3The compressive strength is more than or equal to 20 Mpa; the pole core insulation 35 and the insulation refractory material 36 are insulation magnesium-calcium composite ramming materials.
Drawings
The following describes in further detail embodiments of the present invention with reference to the accompanying drawings;
FIG. 1 is a schematic diagram of the system of the present invention
FIG. 2 is a top view of the bottom of an electric arc furnace according to the invention
Description of the figures
1. Slag transport tank, 2, intermediate slag tank, 3, electric arc furnace, 4, cooling tank, 5, stirrer, 6, continuous casting machine, 31, furnace body, 32, furnace cover, 33, three-phase alternating current electrode, 35, pole core insulation, 36, insulating refractory material, 37, refractory brick, 38, slag overflow port, 39, residual slag port, 321, slag inlet, 322, auxiliary material inlet, 331, metal electrode, 332, refractory electrode, 381, temperature measuring device, 41 and foaming agent inlet.
Detailed Description
The invention relates to a device for producing foam glass by using liquid blast furnace slag, which mainly comprises a slag conveying tank 1, an intermediate slag tank 2, an alternating current arc furnace 3, a cooling tank 4, a stirrer 5 and a continuous casting machine 6, wherein the slag conveying tank 1 is used for conveying liquid blast furnace slag from a slag outlet of the blast furnace to the intermediate slag tank 2 positioned at the upper part of the alternating current arc furnace 3 by a locomotive, the intermediate slag tank 2 is used for slowly adding the liquid blast furnace slag into the alternating current arc furnace 3 through a slag inlet 321, mineral raw materials, mine tailings, fly ash and the like which are uniformly mixed according to a certain proportion are added from an auxiliary material inlet 322, the mixture is heated to 1400 ℃, flows into the cooling tank 4, a foaming agent is added through a foaming agent inlet 41 and flows out to the stirrer 5 for carrying out alternating current stirring and casting molding by a continuous casting machine 6, annealing is carried out at the annealing temperature of 550-600 ℃ for 2-3 hours, the alternating current arc furnace 3 mainly comprises a furnace cover 31 and a furnace cover 32, the furnace cover 32 is positioned at the top of the furnace body 31 and provided with a slag inlet 321 and an auxiliary material inlet 322, the furnace body 31 and a cylindrical furnace body 31, the furnace body 33 is provided with a forked insulated electrode 33, the furnace body is formed by a refractory metal tamping copper plate 35, the three-shaped electrode, the furnace body, the refractory metal-shaped electrode sealing structure, the furnace body is positioned on the furnace body 35, the furnace body is formed by a forked insulated furnace body, the furnace body insulated copper plate 35, the refractory metal tamping furnace body is positioned on the furnace body insulated electrode tamping furnace body, the furnace body insulated electrode tamping plate 35 is positioned on the furnace body, the furnace.
The three-phase alternating current electrodes 33 are respectively connected with an A \ B \ C three-phase power supply of a variable low-voltage side of the electric furnace, and after the three-phase alternating current electrodes are electrified, a rotating magnetic field in a fixed direction is formed in the furnace body, so that the three-phase alternating current electrodes play a role in electromagnetic stirring in the furnace in the smelting process.
The refractory electrode 332 is a conductive magnesium-carbon composite ramming material, and the resistivity after carbonization is less than or equal to 3 multiplied by 10-4Omega.m, volume density not less than 2.8g/cm3The compressive strength is more than or equal to 20 Mpa; the pole core insulation 35 and the insulation refractory material 36 are insulation magnesium-calcium composite ramming materials.
The temperature measuring device 381 monitors the temperature of liquid slag in the slag overflow port 38 of the electric arc furnace in real time, the liquid level in the electric arc furnace is kept lower than the slag overflow port 38 before the temperature reaches 1400 ℃, the current is increased for smelting, after the temperature reaches 1400 ℃ and ~ 1500 ℃ to 1500 ℃, the intermediate slag tank 2 starts to supplement blast furnace liquid slag to the slag inlet 321, so that the high-temperature liquid slag overflows through the slag overflow port 38, auxiliary materials are added through the auxiliary material inlet 322 while supplementing the blast furnace liquid slag, the supplement amount of the blast furnace liquid slag and the addition of the auxiliary materials are controlled by adjusting the smelting current of the electric arc furnace, so that the high-temperature liquid slag continuously flows out of the slag overflow port, when the furnace is stopped for a long time or the electric arc furnace is required to be overhauled, the slag residual port 39 needs to be opened to remove residues in the furnace body to prevent cooling and solidification, and refractory mortar is used for.
The raw material is the blast furnace hot slag, so that the problem of stockpiling the blast furnace slag as solid waste is solved, the waste heat of the molten blast furnace slag is effectively utilized, the resource recycling of the molten blast furnace slag is realized, and the resource utilization rate is improved; and the abundant mineral substances have excellent overall mechanical property through high-temperature smelting. The adoption of the mode of furnace bottom slag overflow ensures that high-temperature liquid slag is continuously provided for the production line, the raw materials of the molten slag with stable flow, temperature, components and viscosity are provided, the production line is ensured to produce high-standard and high-quality building material products, the foundation is laid, the scouring of the refractory material of the electric arc furnace during feeding is reduced, and the continuous service life of the refractory material is ensured.
Claims (4)
1. A device for producing foam glass by using liquid blast furnace slag comprises a slag transporting tank (1), an intermediate slag tank (2), an alternating current electric arc furnace (3), a cooling tank (4), a stirrer (5) and a continuous casting machine (6), and is characterized in that the slag transporting tank (1) is used for transporting liquid blast furnace slag from a slag outlet of the blast furnace to the intermediate slag tank (2) positioned at the upper part of the alternating current electric arc furnace (3) by a locomotive, the intermediate slag tank (2) slowly adds the liquid blast furnace slag into the alternating current electric arc furnace (3) through a slag inlet (321), mineral raw materials, mine tailings, coal ash and the like which are uniformly mixed according to a certain proportion are added from an auxiliary material inlet (322), the mixture flows into the cooling tank (4) after being heated to 1400 ℃ and ~ 1500 ℃, a foaming agent is added through a foaming agent inlet (41) and then flows out to the stirrer (5) to be stirred, the continuous casting machine (6) is used for mold casting forming, the annealing temperature is 550-600 ℃ after the forming;
the alternating current electric arc furnace (3) mainly comprises a furnace body (31) and a furnace cover (32), wherein the furnace cover (32) is positioned at the top of the furnace body (31) and is provided with a slag inlet (321) and an auxiliary material inlet (322); the furnace body (31) is of a cylindrical structure, a three-phase alternating current electrode (33) is arranged at the bottom of the furnace body, the three-phase alternating current electrode (33) is of a circular ring shape surrounded by three fan-shaped structures, the three phases are insulated and separated by insulating and fireproof materials (36), each electrode of the three-phase alternating current electrode (33) is respectively composed of a metal electrode (331) and a fireproof electrode (332), the metal electrode (331) is composed of a forked electrode made of a plurality of copper rods and welded on a fan-shaped copper plate, the length of the forked electrode is 2/3 of the thickness of the furnace bottom, and the fan-shaped copper plate is partially exposed outside the furnace body (31); after the metal electrode (331) is positioned, firstly, the insulating refractory material (36) is used for tamping layer by layer to 1/3 of the total thickness of the bottom part of the furnace, then, the conducting refractory material is used for continuously tamping layer by layer at the position of the three-phase alternating current electrode (33), and the rest part is continuously tamped layer by using the insulating refractory material (36); the side surface of the furnace body (31) is provided with a slag overflow port (38), and the slag overflow port (38) is led out from the side surface of the furnace bottom and is connected with a cooling box (4) at a position 1/5 which is upward to the height of the furnace body; a temperature measuring device (381) is arranged on the inner side of the top of the slag overflow port (38).
2. The apparatus for producing foam glass from liquid blast furnace slag according to claim 1, wherein: the three-phase alternating current electrodes (33) are respectively connected with an A \ B \ C three-phase power supply of the electric furnace to be changed into a low-voltage side power supply, and after the three-phase alternating current electrodes are electrified, a rotating magnetic field in a fixed direction is formed in the furnace body, so that the three-phase alternating current electrodes simultaneously play a role in electromagnetic stirring in the furnace in the smelting process.
3. The apparatus for producing foam glass from liquid blast furnace slag according to claim 1, wherein: the refractory electrode (332) is a conductive magnesium-carbon composite ramming material, and the resistivity after carbonization is less than or equal to 3 multiplied by 10-4Omega.m, volume density not less than 2.8g/cm3The compressive strength is more than or equal to 20 Mpa; the pole core insulation (35) and the insulation refractory material (36) are insulating magnesium-calcium composite ramming materials.
4. The device for producing the foam glass by the liquid blast furnace slag according to the claim 1, characterized in that the temperature measuring device (381) monitors the temperature of the liquid slag in the slag overflow port (38) of the electric arc furnace in real time, the liquid level in the electric arc furnace is kept lower than the slag overflow port (38) before the temperature reaches 1400 ℃, the current is increased for smelting, when the temperature reaches 1400 ℃ to ~ 1500 ℃, the intermediate slag pot (2) starts to supplement the blast furnace liquid slag to the slag inlet port (321), so that the high temperature liquid slag overflows through the slag overflow port (38), the auxiliary material is added from the auxiliary material inlet (322) while supplementing the blast furnace liquid slag, and the supplement amount of the blast furnace liquid slag and the addition of the auxiliary material are controlled by adjusting the smelting current of the electric arc furnace, so that the high temperature liquid slag continuously flows out from the slag overflow port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710468711.5A CN107417072B (en) | 2017-06-20 | 2017-06-20 | Device for producing foam glass by liquid blast furnace slag |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710468711.5A CN107417072B (en) | 2017-06-20 | 2017-06-20 | Device for producing foam glass by liquid blast furnace slag |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107417072A CN107417072A (en) | 2017-12-01 |
| CN107417072B true CN107417072B (en) | 2019-12-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710468711.5A Active CN107417072B (en) | 2017-06-20 | 2017-06-20 | Device for producing foam glass by liquid blast furnace slag |
Country Status (1)
| Country | Link |
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| CN (1) | CN107417072B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110282862B (en) * | 2019-06-24 | 2021-09-14 | 鞍钢股份有限公司 | Device and method for preparing foam glass |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941802A (en) * | 2010-09-07 | 2011-01-12 | 重庆大学 | Method for directly utilizing liquid-state blast furnace slag to manufacture glass ceramics |
| CN102815867A (en) * | 2012-09-05 | 2012-12-12 | 北京盛康宁科技开发有限公司 | Color glass-ceramic plate and preparation method thereof |
| CN104496184A (en) * | 2014-09-03 | 2015-04-08 | 宝钢矿棉科技（宁波）有限公司 | Blast furnace hot slag microcrystalline glass and preparation method thereof |
| CN105417957A (en) * | 2016-01-27 | 2016-03-23 | 华北理工大学 | Preparing method of energy-saving type high blast slag microcrystal glass |
| CN106587634A (en) * | 2016-12-16 | 2017-04-26 | 武汉理工大学 | Marbled glass ceramics directly employing fusion blast furnace slag and preparation method of marbled glass ceramics |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| RU2123484C1 (en) * | 1996-07-18 | 1998-12-20 | Всероссийский федеральный научно-исследовательский и проектно-конструкторский технологический институт строительной индустрии "ВНИИжелезобетон" | Slag-alkaline cellular concrete |
| CA2678169A1 (en) * | 2009-09-03 | 2011-03-03 | Yongqiang Guo | Method and apparatus for preparing a slag melt in a medium frequency induction furnace for producing slag wool fiber materials |
-
2017
- 2017-06-20 CN CN201710468711.5A patent/CN107417072B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101941802A (en) * | 2010-09-07 | 2011-01-12 | 重庆大学 | Method for directly utilizing liquid-state blast furnace slag to manufacture glass ceramics |
| CN102815867A (en) * | 2012-09-05 | 2012-12-12 | 北京盛康宁科技开发有限公司 | Color glass-ceramic plate and preparation method thereof |
| CN104496184A (en) * | 2014-09-03 | 2015-04-08 | 宝钢矿棉科技（宁波）有限公司 | Blast furnace hot slag microcrystalline glass and preparation method thereof |
| CN105417957A (en) * | 2016-01-27 | 2016-03-23 | 华北理工大学 | Preparing method of energy-saving type high blast slag microcrystal glass |
| CN106587634A (en) * | 2016-12-16 | 2017-04-26 | 武汉理工大学 | Marbled glass ceramics directly employing fusion blast furnace slag and preparation method of marbled glass ceramics |
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| CN107417072A (en) | 2017-12-01 |
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Address after: 266061 Qingdao University, 93 Songling Road, Laoshan District, Qingdao City, Shandong Province Applicant after: Xu Yurui Address before: 266404 Electrical Engineering Department, Qingdao Bay College, No. 316, two road, science and education, West Coast New District, Qingdao, Shandong Applicant before: Xu Yurui |
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Address after: Jiuyang group, No.8, Zhengtong South Road, Yangli Town, Laiwu District, Jinan City, Shandong Province Applicant after: Xu Yurui Address before: 266061 Qingdao University, 93 Songling Road, Laoshan District, Qingdao City, Shandong Province Applicant before: Xu Yurui |
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Effective date of registration: 20240124 Address after: No. 29 Longtan East Street, Laiwu District, Jinan City, Shandong Province, 271199 Patentee after: Shandong Luxin Guohe energy saving and Environmental Protection Technology Co.,Ltd. Country or region after: China Address before: Jiuyang group, No.8 Zhengtong South Road, Yangli Town, Laiwu District, Jinan City, Shandong Province Patentee before: Xu Yurui Country or region before: China |
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