CN2892875Y - Blast-furnace carbon bottom cooling device - Google Patents
Blast-furnace carbon bottom cooling device Download PDFInfo
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- CN2892875Y CN2892875Y CN 200620024172 CN200620024172U CN2892875Y CN 2892875 Y CN2892875 Y CN 2892875Y CN 200620024172 CN200620024172 CN 200620024172 CN 200620024172 U CN200620024172 U CN 200620024172U CN 2892875 Y CN2892875 Y CN 2892875Y
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- water pipe
- pipe
- cooling tube
- water cooling
- furnace
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Abstract
The utility model relates to a blast furnace carbon bottom cooling device. The utility model comprising a water cooling pipe of a carbon ramming material layer positioned at the bottom of the blast furnace is characterized in that: the water cooling pipe has an external water pipe and an internal water pipe. A sealing board is welded with the two ends of the external water pipe, and an inclined water pipe is welded with the rear end for water inlet and outlet. Throughout holes are arranged in the sealing board at the end that the external water pipe welded with the inclined water pipe. The internal water pipe is arranged in the external water pipe and one end of the internal water pipe is extended outside the external water pipe through the throughout hole. The other end of the water cooling pipe is front end, and the distance between the internal water pipe extending to the front end of the external water pipe and the sealing board in the front end of the water cooling pipe is not less than 300mm. Uniform space is arranged between the internal water pipe and the external water pipe. A thermocouple steel pipe and an exhausting steel pipe having same length and parallel with the external water pipe are welded below the external water pipe. Supporting poles from one to three of 50-120mm are welded in the front end of the external water pipe. The cooling device has a better effect of heat transfer, which improves the utilization coefficient of the old blast furnace after installed in the old blast furnace bottom and increases the safety coefficient of the blast furnace.
Description
Technical field
The utility model relates to a kind of blast furnace carbon bottom cooler, especially the large blast furnace carbon bottom cooler.
Background technology
The bottom construction of iron-smelting blast furnace mainly is that thermally conductive material constitutes as the schungite brick fuel in conjunction with ceramic cup, since the temperature in the stove up to 1600 ℃ about, must cool off, existing blast furnace carbon bottom cooler is the straight-through water cooling tube of individual layer, be set in parallel in furnace bottom, cool off big-and-middle-sized iron-smelting blast furnace with the soft water sealing and circulating, water coolant flows into from the other end outflow from an end of straight-through water cooling tube, and the heat of furnace bottom is taken out of.General capacity is 1000m
3Above iron-smelting blast furnace is 1650m particularly
3Above blast furnace, cupola well after going into operation, the furnace bottom initial temperature is just than blast furnace height of the same type, blast furnace opening is cupola well soon, bottom temperature progressively raises, along with blast-furnace smelting is continually strengthened, when the capacity factor of a blast furnace is low, as 2.0 o'clock, with all right ordinary production of the refrigerating unit of straight-through water cooling tube, when the capacity factor of a blast furnace brought up to 2.4, this class bottom cooler just can not satisfy the blast furnace production requirement, because of cupola well, thermal resistance is excessive between furnace bottom cooling system and the refractory masonry, it is low excessively that charcoal is smash bed of material thermal conductivity, be 0.786～2.096W/m.k, do not reach requirement, whole heat-transfer effect is poor, cause bricking heat savings, the heat band that produces in the stove does not come out, thereby causes furnace bottom and temperature of the furnace hearth to raise unusually, is 1650m as capacity
3Blast furnace, up to 932 ℃, the temperature of 7.3m position is elevated to 914 ℃ with the temperature of absolute altitude 6.5 m positions in center at the bottom of the State of Blast Furnace, head and shoulders above the normal temperature range of blast furnace, the danger that causes blast furnace hearth to burn is arranged, seriously jeopardize the safety in production of blast furnace.The capacity factor of a blast furnace can only be reduced to 2.0, and day output has only 3300 tons, directly has influence on iron output.In order to increase iron output, must improve the utilization coefficient of old blast furnace now, need to set up bottom cooler, need the blast furnace carbon bottom cooler that is adapted to old blast furnace at old blast furnace.
Summary of the invention
In order to overcome the above-mentioned not enough utilization coefficient that improves old blast furnace of existing blast furnace carbon bottom cooler, the utility model provides a kind of heat-transfer effect the good blast furnace carbon bottom cooler of setting up at old blast furnace.
Design of the present utility model is the double-deck water-chilling plant that adopts inner conduit and outer water pipe to constitute, inner conduit is a water inlet pipe, outer water pipe is that rising pipe is a cooling tube, hold material at the high heat conduction charcoal of water cooling tube outer filling, improve heat transfer efficiency, the heat of outer water pipe at the bottom of State of Blast Furnace taken out of, reduces the temperature of blast furnace hearth and furnace bottom.
The utility model comprises water cooling tube, the charcoal that water cooling tube is arranged at the bottom of the blast furnace is smash the bed of material, it is characterized in that: said water cooling tube has outer water pipe and inner conduit, outer water pipe is a weldless steel tube, the diameter of outer water pipe is Φ 50-Φ 70mm, inner conduit is a stainless steel tube, the diameter of inner conduit is Φ 30-Φ 34mm, sealing plate is being welded at the two ends of outer water pipe, at the oblique water pipe that is welding as the rear end of Inlet and outlet water as water outlet, tiltedly water pipe communicates with outer water pipe, weld at outer water pipe oblique water pipe one end sealing plate the middle part through hole is arranged, inner conduit is installed in the outer water pipe and has an end to be reached outside the outer water pipe by this through hole, welded seal between this through hole and the inner conduit, the other end of water cooling tube is a front end, and inner conduit has the distance that is not less than 300mm between reaching the sealing plate of front end in the outer water pipe and water cooling tube front end, cushion block is arranged between inner conduit and outer water pipe and uniform gap is arranged.Welding the thermopair steel pipe and the exhaust steel pipe that are used to install thermopair with outer water pipe equal in length arranged side by side under outer water pipe, the diameter of thermopair steel pipe and exhaust steel pipe is Φ 8-Φ 10mm.Thermopair is inserted in the thermopair steel pipe, and the temperature spot of detection is the temperature of water cooling tube front end, temperature signal is presented on the computer picture of master control room.Back water cooling tube front end is installed is in the milk full in order to guarantee water cooling tube, front end at outer water pipe is welding one to three pole of long 50-120mm, be after water cooling tube is installed, certain space is left on the top of water cooling tube and deep hole, high heat conduction carbonaceous slurry flows unobstructed full with slurry when guaranteeing to be in the milk, and can normal steam discharge and the overflow of slurry, the exhaust steel pipe is installed is convenient to when irritating high heat conduction carbonaceous slurry exhaust and irritates real.
The water cooling tube of this blast furnace carbon bottom cooler is to be provided with like this, the through hole that the front end of water cooling tube passes the distribution of furnace shell furnace bottom stretches to the blast furnace center, water cooling tube is penetrated the charcoal that is arranged at the bottom of the State of Blast Furnace by the outside width of cloth in blast furnace center and is smash the bed of material, general radially setting along furnace bottom, smashing at charcoal has high heat conduction carbonaceous slurry between the bed of material and the water cooling tube, the rear end of water cooling tube and oblique water pipe are outside furnace shell.The length of water cooling tube is divided into three to four kinds, three to five long water cooling tubes are arranged, the distance at the front end of long water cooling tube and furnace bottom center is 300-500mm, six to nine vice-minister's water cooling tubes are arranged, the distance at the front end of vice-minister's water cooling tube and furnace bottom center is 800-1200mm, and short water cooling tube is arranged eight to 12 times, and the distance at the front end of inferior short water cooling tube and furnace bottom center is 1400-1700mm, 14 to 18 short water cooling tubes are arranged, and the front end of short water cooling tube and the distance at furnace bottom center are 2500-2900mm.
In order to increase the stopping property between furnace shell and the water cooling tube, the furnace shell sealing plate of then being close to furnace shell in the furnace shell outside weld, has a through hole at the furnace shell sealing plate, a side of being close to furnace shell at the furnace shell sealing plate has into stock tank, an end that advances stock tank and furnace shell sealing plate through hole communicate, the other furnace shell sealing plate of this through hole opposite side welding grout pipe, the end that grout pipe reaches in the furnace shell sealing plate communicates with advancing stock tank, the furnace shell sealing plate the through hole inboard two positions and thermopair steel pipe and the corresponding arc groove of exhaust steel pipe are arranged.The furnace shell sealing plate through hole corresponding with the lead to the hole site of furnace shell.The furnace shell sealing plate is enclosed within behind the water cooling tube through hole that water cooling tube is passed furnace shell by through hole and puts in furnace bottom, welded seal between this through hole and the outer water pipe, and two arc grooves are enclosed within thermopair steel pipe and exhaust steel pipe.Use the bonded adhesives adhering and sealing between two arc grooves and thermopair steel pipe and the exhaust steel pipe.Simultaneously the furnace shell sealing plate through hole between part between two arc grooves and outer water pipe, also use the bonded adhesives adhering and sealing.
When this refrigerating unit is set up in the carbon bottom cooler top position of old blast furnace, outside the furnace bottom furnace shell, beat the deep hole of diameter greater than outer water pipe, behind water cooling tube insertion deep hole, be poured into high heat conduction carbonaceous slurry between deep hole and the water cooling tube and be full of between the two gap, the space between being full of at the bottom of water cooling tube front end and the deep hole simultaneously.The outer end of inner conduit connects logically during use with water inlet pipe as feed-water end, and the oblique water pipe of outer water pipe connects with return water pipe as the water side and leads to.The thermopair of measuring temperature in the blast furnace is installed in the thermopair steel pipe, receives temperature indicator with lead.
This blast furnace carbon bottom cooler is taked said structure, be particularly useful for large blast furnace brick fuel furnace bottom and strengthen cooling, compare, obviously improved heat transfer efficiency with the blast furnace carbon bottom cooler that existing straight-through water cooling tube only is installed, the temperature of furnace bottom furnace foundation descends significantly, is 1650m as capacity
3Blast furnace, the temperature of center absolute altitude 5.5m, 6.5m position at the bottom of the State of Blast Furnace, adopt existing blast furnace carbon bottom cooler temperature be respectively 270 ℃ with 932 ℃, set up behind this blast furnace carbon bottom cooler temperature be reduced to respectively 150 ℃ with 680 ℃-700 ℃, and very fast stable.The capacity factor of a blast furnace is brought up to 2.3-2.4 by 2.0, and day output is brought up to 3800 tons by 3300 tons.Water cooling tube selects for use outer water pipe as return water pipe in addition, as water inlet pipe, guarantees the life-span of water cooling tube with inner conduit, and generation stove labour (〉=10 years) is water-tight; The outer water pipe front end is welding sealing plate, guarantees that weld seam does not have to leak, to protect the life-span of water cooling tube.At cushion block of front position welding of inner conduit, the feed-water end of inner conduit sealing plate fixing seal, the uniform gap on the whole circumference of assurance water cooling tube and outloop water pipe, thus guarantee that current are unobstructed, no dead angle; Water speed 〉=2.6m/s, the water yield is 11.6t/h, 2.2 ℃ of water temperature difference, heat-eliminating medium is a soft water, non-scaling.Back water cooling tube front end is installed is in the milk full in order to guarantee water cooling tube, outer water pipe front end welding pole, be after water cooling tube is installed, leave certain space at the bottom of the hole of water cooling tube and deep hole, it is full to guarantee to be in the milk, outer water pipe external welding exhaust steel pipe, the steam discharge upflow tube during as grouting can guarantee the overflow of normal steam discharge and slurry.Obtain obvious effects after the installation, avoided the hidden danger of blast furnace hearth, burn-through of furnace hearth effectively, improved the safety coefficient of blast furnace, prolonged the work-ing life of blast furnace, delayed the time of blast furnace overhaul.Water cooling tube is provided with by mind-set radiation in the blast furnace, and cooling intensity is more reasonable, and the cooling field evenly.This blast furnace carbon bottom cooler is used for the repacking of old blast furnace, is particularly useful for capacity 1000m
3Paramount 2000m
3The repacking of the old blast furnace of ironmaking.
Description of drawings
Fig. 1 is the longitudinal sectional view of the water cooling tube of the utility model embodiment.
Fig. 2 is the sectional view along A-A line among Fig. 1.
Fig. 3 is the vertical view with the corresponding water cooling tube front end of Fig. 1.
Fig. 4 is the installation plan of a water cooling tube at the bottom of blast furnace of the utility model embodiment, cuts open along the D-D line among Fig. 7.
Fig. 5 is the sectional view along B-B line among Fig. 4, and Fig. 1 amplifies relatively.
Fig. 6 is the sectional view along C-C line among Fig. 5, and Fig. 1 amplifies relatively.
Fig. 7 is the installation plan of water cooling tube embodiment at the bottom of blast furnace of the utility model embodiment, is that the horizontal plane at the bottom of the blast furnace is cut open among the figure, and Fig. 1 dwindles relatively.
Among the above-mentioned figure:
1, front end 2, double-faced forming weld seam 3, water cooling tube 4, sealing plate 5, outer water pipe inner chamber 6, gap 7, inner conduit 8, outer water pipe 9, soldered 10, oblique water pipe 11, rear end 12, soldered 13, soldered 14, feed-water end 15, sealing plate 16, through hole 17, lead 18, thermopair steel pipe 19, inner conduit inner chamber 20, cushion block 21, water side 22, thermopair 23, pole 24, exhaust steel pipe 25, furnace shell 26, through hole 27, furnace shell sealing plate 28, through hole 29, return water pipe 30, water inlet pipe 31, charcoal is smash the bed of material 32, high heat conduction carbonaceous slurry 33, deep hole 34, grout pipe 35, bonded adhesives 36, bonded adhesives 37, arc groove 38, soldered 39, soldered 40, advance stock tank 41, long water cooling tube 42, vice-minister's water cooling tube 43, inferior short water cooling tube 44, short water cooling tube
Embodiment
Describe embodiment of the present utility model in detail below in conjunction with embodiment and accompanying drawing thereof, but embodiment of the present utility model is not limited to following embodiment.
The composition of this blast furnace carbon bottom cooler comprises water cooling tube 3, and water cooling tube 3 is parts of the key of blast furnace carbon bottom cooler, and the charcoal that is arranged at the bottom of the State of Blast Furnace is smash the bed of material.The water cooling tube 3 that Fig. 1 and Fig. 2 describe has outer water pipe 8 and inner conduit 7, outer water pipe is a weldless steel tube, the diameter of outer water pipe 8 and tube wall are Φ 60 * 8mm, inner conduit is a stainless steel tube, the diameter of inner conduit 7 and tube wall are Φ 32 * 3.5mm, and the two ends of outer water pipe 8 are being welded sealing plate 4 and sealing plate 15 respectively, at the oblique water pipe 10 that is welding as the rear end 11 of Inlet and outlet water as water outlet, tiltedly the diameter and the tube wall of water pipe 10 are Φ 42 * 4mm, and tiltedly water pipe 10 communicates with outer water pipe 8.At the middle part of sealing plate 15 through hole 16 is arranged, inner conduit 7 is installed in the outer water pipe 8 and has an end to be reached outside the outer water pipe 8 by through hole 16, be that feed-water end 14 is outside through hole 16, welded seal between through hole 16 and the inner conduit 7, the other end of water cooling tube 3 is a front end 1, and the water side 21 of inner conduit 7 reaches between front end 1 and the sealing plate 4 in the outer water pipe 8 300 mm apart.Between the water side 21 of inner conduit 7 and the front end 1 in the outer water pipe 8, cushion block 20 is arranged, uniform gap 6 is arranged between inner conduit 7 and the outer water pipe 8 like this.Welding the thermopair steel pipe 18 and exhaust steel pipe 24 that are used to install thermopair 22 with outer water pipe 8 equal in length arranged side by side for 8 times at outer water pipe, thermopair steel pipe 18 is Φ 8 * 1.5mm with the diameter and the tube wall of exhaust steel pipe 24.The pole 23 that outer water pipe 8 front ends 1 are welding two long 50mm, see Fig. 3.The sealing plate 4 of present embodiment is δ=12mm steel plate, single-sided welding double-faced forming when circumference is opened 45 ° of double V-grooves and the welding of outer water pipe 8 front ends inboard.
Present embodiment is to be capacity 1650m
3The blast furnace carbon bottom cooler that is provided with of blast furnace, be installed in existing straight-through water cooling tube blast furnace carbon bottom cooler top, diameter at the bottom of the furnace shell is 12.4m, its water cooling tube 3 is to be provided with like this, see Fig. 4, the through hole 26 that the front end 1 of water cooling tube 3 passes the distribution of furnace shell 25 furnace bottoms stretches to the blast furnace center, water cooling tube 3 is penetrated the charcoal that is arranged at the bottom of the State of Blast Furnace by the outside width of cloth in blast furnace center and is smash the bed of material 31, present embodiment is the radially setting along furnace bottom, referring to Fig. 7, smashing at charcoal has high heat conduction carbonaceous slurry 32 between the bed of material 31 and the water cooling tube 3, the rear end 11 of the Inlet and outlet water of water cooling tube 3 and oblique water pipe 10 are outside furnace shell 25.Present embodiment has 36 through holes 26 at furnace shell 25, each through hole 26 is installed a water cooling tube 3, the length of the water cooling tube 3 of present embodiment is divided four kinds, four long water cooling tubes 41 are arranged, the distance at the front end of long water cooling tube 41 and furnace bottom center is 400mm, eight vice-minister's water cooling tubes 42 are arranged, the distance at the front end of vice-minister's water cooling tube 42 and furnace bottom center is 1000mm, short water cooling tube 43 is arranged eight times, the distance at the front end of inferior short water cooling tube 43 and furnace bottom center is 1600mm, the short water cooling tube 44 of ten six roots of sensation is arranged, and the front end of short water cooling tube 44 and the distance at furnace bottom center are 2700mm.
In order to increase the stopping property between furnace shell 23 and the water cooling tube 3, the furnace shell sealing plate 27 of then being close to furnace shell 25 in furnace shell 25 outside welds, at furnace shell sealing plate 27 through hole 28 is arranged, referring to Fig. 4 and Fig. 6, a side of being close to furnace shell 25 at furnace shell sealing plate 27 has into stock tank 40, an end that advances stock tank 40 communicates with the through hole 28 of furnace shell sealing plate 27, opposite side at through hole 28 other furnace shell sealing plates 27 is welding grout pipe 34, the end that grout pipe 34 reaches in the furnace shell sealing plate 27 communicates with advancing stock tank 40, and two positions and thermopair steel pipe 18 and exhaust steel pipe 24 corresponding arc grooves such as arc groove 37 are arranged in through hole 28 inboards.The through hole 28 of furnace shell sealing plate 27 is corresponding with through hole 26 positions of furnace shell 25.Furnace shell sealing plate 27 is enclosed within water cooling tube 3 backs by through hole 28 through hole 26 that water cooling tube 3 passes furnace shell 25 is put in furnace bottom, welded seal between through hole 28 and the outer water pipe 3, and two arc grooves 37 are enclosed within thermopair steel pipe 18 and exhaust steel pipe 24.Use the bonded adhesives adhering and sealing between two arc grooves 37 and thermopair steel pipe 18 and the exhaust steel pipe 24.Simultaneously through hole 28 is also used the bonded adhesives adhering and sealing between part between two arc grooves 37 and outer water pipe 8, referring to Fig. 5.
The high heat conduction carbonaceous slurry that present embodiment is used is the YBP-C carbonaceous mud that Beijing new material technology company limited of 5-linked Tontru produces, and the bonded adhesives of use is the dimension power solid 98 that new Tianshan Mountains, Taiyuan Science and Technology Ltd. produces
The seepage repairment agent.
Claims (2)
1, a kind of blast furnace carbon bottom cooler, it comprises water cooling tube, the charcoal that water cooling tube is arranged at the bottom of the blast furnace is smash the bed of material, it is characterized in that: said water cooling tube has outer water pipe and inner conduit, the diameter of outer water pipe is Φ 50-Φ 70mm, the diameter of inner conduit is Φ 30-Φ 34mm, sealing plate is being welded at the two ends of outer water pipe, at the oblique water pipe that is welding as the rear end of Inlet and outlet water as water outlet, tiltedly water pipe communicates with outer water pipe, weld at outer water pipe oblique water pipe an end sealing plate the middle part through hole is arranged, inner conduit is installed in the outer water pipe and has an end to be reached outside the outer water pipe by this through hole, welded seal between this through hole and the inner conduit, the other end of water cooling tube is a front end, inner conduit has the distance that is not less than 300mm between reaching the sealing plate of front end in the outer water pipe and water cooling tube front end, cushion block is arranged between inner conduit and outer water pipe and uniform gap is arranged; Welding the thermopair steel pipe and the exhaust steel pipe that are used to install thermopair with outer water pipe equal in length arranged side by side under outer water pipe, the diameter of thermopair steel pipe and exhaust steel pipe is Φ 8-Φ 10mm; Front end at outer water pipe is welding one to three pole of long 50-120mm.
2, blast furnace carbon bottom cooler according to claim 1, it is characterized in that: the through hole that the front end of water cooling tube passes the distribution of furnace shell furnace bottom stretches to the blast furnace center, water cooling tube is penetrated the charcoal that is arranged at the bottom of the State of Blast Furnace by the outside width of cloth in blast furnace center and is smash the bed of material, smashing at charcoal has high heat conduction carbonaceous slurry between the bed of material and the water cooling tube, the rear end of water cooling tube and oblique water pipe are outside furnace shell; The length of water cooling tube is divided into three to four kinds, three to five long water cooling tubes are arranged, the distance at the front end of long water cooling tube and furnace bottom center is 300-500mm, six to nine vice-minister's water cooling tubes are arranged, the distance at the front end of vice-minister's water cooling tube and furnace bottom center is 800-1200mm, and short water cooling tube is arranged eight to 12 times, and the distance at the front end of inferior short water cooling tube and furnace bottom center is 1400-1700mm, 14 to 18 short water cooling tubes are arranged, and the front end of short water cooling tube and the distance at furnace bottom center are 2500-2900mm; The furnace shell sealing plate of then being close to furnace shell in the furnace shell outside weld, has a through hole at the furnace shell sealing plate, a side of being close to furnace shell at the furnace shell sealing plate has into stock tank, an end that advances stock tank and furnace shell sealing plate through hole communicate, the other furnace shell sealing plate of this through hole opposite side welding grout pipe, the end that grout pipe reaches in the furnace shell sealing plate communicates with advancing stock tank, the furnace shell sealing plate the through hole inboard two positions and thermopair steel pipe and the corresponding arc groove of exhaust steel pipe are arranged; The furnace shell sealing plate is enclosed within water cooling tube by through hole, welded seal between this through hole and the outer water pipe, and two arc grooves are enclosed within thermopair steel pipe and exhaust steel pipe; Use the bonded adhesives adhering and sealing between two arc grooves and thermopair steel pipe and the exhaust steel pipe, the furnace shell sealing plate through hole between part between two arc grooves and outer water pipe, also use the bonded adhesives adhering and sealing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620024172 CN2892875Y (en) | 2006-04-20 | 2006-04-20 | Blast-furnace carbon bottom cooling device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200620024172 CN2892875Y (en) | 2006-04-20 | 2006-04-20 | Blast-furnace carbon bottom cooling device |
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| Publication Number | Publication Date |
|---|---|
| CN2892875Y true CN2892875Y (en) | 2007-04-25 |
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ID=38061042
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200620024172 Expired - Fee Related CN2892875Y (en) | 2006-04-20 | 2006-04-20 | Blast-furnace carbon bottom cooling device |
Country Status (1)
| Country | Link |
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| CN (1) | CN2892875Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269270A (en) * | 2011-06-23 | 2011-12-07 | 章丘市盛隆锅炉设备有限公司 | Water inlet/outlet sealing device |
| CN111303669A (en) * | 2020-03-02 | 2020-06-19 | 唐山黑猫炭黑有限责任公司 | Novel carbon black rapid cooling device and system |
-
2006
- 2006-04-20 CN CN 200620024172 patent/CN2892875Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102269270A (en) * | 2011-06-23 | 2011-12-07 | 章丘市盛隆锅炉设备有限公司 | Water inlet/outlet sealing device |
| CN111303669A (en) * | 2020-03-02 | 2020-06-19 | 唐山黑猫炭黑有限责任公司 | Novel carbon black rapid cooling device and system |
| CN111303669B (en) * | 2020-03-02 | 2022-05-20 | 唐山黑猫炭黑有限责任公司 | Novel carbon black rapid cooling device and 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: SHANXI TAIGANG STAINLESS STEEL CO., LTD. Free format text: FORMER OWNER: TAIYUAN IRON AND STEEL (GROUP) CO LTD Effective date: 20070629 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20070629 Address after: 030003, No. 2, sharp lawn, Taiyuan Patentee after: Shanxi Taigang Stainless Steel Co., Ltd. Address before: 030003 No. 2, sharp lawn, Taiyuan City, Shanxi Province Patentee before: Taiyuan Iron & Steel (Group) Co., Ltd. |
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| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070425 Termination date: 20140420 |