CN201592246U - Heat-accumulating type torpedo car baking device - Google Patents
Heat-accumulating type torpedo car baking device Download PDFInfo
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- CN201592246U CN201592246U CN2010200223562U CN201020022356U CN201592246U CN 201592246 U CN201592246 U CN 201592246U CN 2010200223562 U CN2010200223562 U CN 2010200223562U CN 201020022356 U CN201020022356 U CN 201020022356U CN 201592246 U CN201592246 U CN 201592246U
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Abstract
The utility model discloses a heat-accumulating type torpedo car baking device, which comprises a T-shaped burner, a gas pipe, a flue, a heat-accumulating air heat exchanger and a gas heat exchanger. The T-shaped burner is arranged in an inner cavity of a torpedo car, the front end of the gas pipe penetrates through a torpedo car cover to be connected with the T-shaped burner, one end of the flue is disposed on the torpedo car cover and communicated with the inner cavity of the torpedo car, the gas heat exchanger is a tubular heat exchanger consisting of a high-temperature smoke inlet, a high-temperature smoke outlet, a gas inlet and a gas outlet, the other end of the flue is connected with the high-temperature smoke inlet of the gas heat exchanger, the high-temperature smoke outlet of the gas heat exchanger is connected with the gas inlet of a right air deflector of the heat-accumulating air heat exchanger, the smoke outlet of a left air defector of the heat-accumulating air heat exchanger is connected with an exhaust pipe, the gas outlet of the gas heat exchanger is communicated with an inner pipe of the gas pipe, and an air outlet of a venting cone of the right air deflector of the heat-accumulating air heat exchanger is communicated with an outer pipe of the gas pipe.
Description
Affiliated technical field
The utility model relates to the apparatus for baking of torpedo jar, relates in particular to heat accumulating type torpedo tank roasting device.
Background technology
Along with the development that blast furnace maximizes, ladle is replaced by large-scale torpedo jar gradually, the torpedo jar in the production process of smelter, be dedicated to load, transport blast-melted to converter for the steel-making use.The torpedo jar must toast before shipment is blast-melted in requirement in accordance with regulations.The baking of existing torpedo jar all is to be fuel with coke-stove gas, converter gas or blast furnace gas etc., mixes with the normal temperature air that does not have preheating, by burner, this mist is burnt in the torpedo jar, thereby realization is to the baking of torpedo jar.The high-temperature flue gas that the torpedo jar produces in bake process then directly is discharged in the atmosphere by the torpedo cover.Because the high-temperature flue-gas that is discharged is higher, generally more than 1,000 about degree, so the waste heat of high-temperature flue gas does not obtain utilization.
The utility model content
The technical problems to be solved in the utility model provides a kind of heat accumulating type torpedo tank roasting device, and this device can utilize the high-temperature flue gas waste heat after the baking to improve baking speed, thereby saves coal gas significantly.
In order to solve the problems of the technologies described above, the utility model heat accumulating type torpedo tank roasting device, this device contains T type burner, Gas Pipe, smoke exhaust pipe, automatic ignition device, pipe and outer tube in Gas Pipe comprises, T type burner is arranged in the inner chamber of torpedo jar, the left and right sides of T type burner is equipped with burner, the Gas Pipe front end passes the torpedo cover and is connected with T type burner, one end of smoke exhaust pipe is arranged on the torpedo cover and with the inner chamber of torpedo jar and communicates, also contain heat accumulating type air heat exchanger and gas change heater, the heat accumulating type air heat exchanger contains left wind guiding member, right wind guiding member, the accumulation of heat tube, arc-shaped rack, gear, power transmission shaft, motor, left side wind guiding member comprises the ventilation cone, volute body, divide air duct, divide air duct to constitute by round tube and the even number demarcation strip more than at least two, the width of demarcation strip is identical with the length of round tube, the length of demarcation strip is identical with the radius of round tube, demarcation strip radially is arranged in the round tube, and evenly round tube inside is divided into some even number cone spaces, with be interval with logical flue gas mouth on the side of the corresponding round tube of some even number cone spaces, divide on the inwall of left side wall that the two ends of the round tube of air duct are separately positioned on volute body and right side wall, the right side wall of volute body is provided with and the corresponding blow vent of the inner some even number cone spaces of round tube, be interval with on the corresponding position of the inner some even number cone spaces of the left side wall of volute body and round tube the air port and with the round tube side on the logical flue gas mouth that is interval with stagger, the blowing air mouth that the volute body left side wall is provided with communicates with half blow vent that the volute body right side wall is provided with, the logical flue gas mouth that is interval with on second half blow vent that the volute body right side wall is provided with and the round tube side communicates, the ventilation cone is arranged on the volute body left side wall, the accumulation of heat tube contains cylinder, demarcation strip, axle sleeve and rotating shaft, rotating shaft is installed in the axle sleeve by bearing, demarcation strip radially is arranged between axle sleeve and the cylinder inner wall, demarcation strip evenly is divided into cylinder interior and divides the inner quantity of air duct identical cone space, in each cone space of cylinder interior heat storage is housed all, arc-shaped rack is arranged on the side of an end of cylinder, the symmetrical configuration of right wind guiding member and left wind guiding member, the accumulation of heat tube is between left wind guiding member and right wind guiding member, the bottom of left side wind guiding member and right wind guiding member is respectively equipped with support, the two ends of the rotating shaft of accumulation of heat tube are separately positioned on the right side wall of the left side wall of right wind guiding member and left wind guiding member, the cone space of accumulation of heat tube is corresponding with left wind guiding member blow vent and left wind guiding member blow vent, the outside of accumulation of heat tube is provided with housing, power transmission shaft one end passes left wind guiding member and described gear is housed, this gear be provided with on the accumulation of heat tube arc-shaped rack engagement, the other end and the motor of power transmission shaft link; Gas change heater is a pipe heat exchanger, and this pipe heat exchanger contains high-temperature flue gas import, high-temperature flue gas outlet, gas inlet and gas exit; The other end of described smoke exhaust pipe is connected with the high-temperature flue gas import of gas change heater by pipeline, the high-temperature flue gas outlet of gas change heater is connected by the gas approach of pipeline with the right wind guiding member of heat accumulating type air heat exchanger, the exhanst gas outlet of the left wind guiding member of heat accumulating type air heat exchanger is connected with blast pipe, the interior pipe of the gas exit of gas change heater and described Gas Pipe interlinks, and the air outlet slit of the right wind guiding member ventilation of heat accumulating type air heat exchanger cone and the outer tube of described Gas Pipe are connected.
The pipeline that links to each other between the high-temperature flue gas import of described smoke exhaust pipe and gas change heater is provided with the emergency diffusion device.
Described automatic ignition device is the rod-type igniter of rising and falling, and the lifting lever top is equipped with two spark levers and is provided with location switch, receives behind the ignition signal igniter and drops to bit switch and open igniting, and when the fire inspection had fire, the successful lifting lever of lighting a fire lifted.
Owing to adopted heat accumulating type air heat exchanger and gas change heater, this not only can utilize a part of waste heat heating blast furnace gas of the high-temperature flue gas that the torpedo jar produces in bake process, and another part of the waste heat of high-temperature flue gas can be accumulated in by the heat accumulating type air heat exchanger and alternately heat combustion air in the heat storage.Combustion air and blast furnace gas enough can reach respectively about 1000 ℃ and about 300 ℃ by heating its temperature, and the temperature that is produced when by T type burner combustion has reached 1300 ℃, so fast baking.Because the heat accumulating type air heat exchanger is accumulated the waste heat of high-temperature flue gas, its discharged flue gas temperature is lower than 150 ℃, facts have proved, can save coal gas more than 50%.
Description of drawings
Fig. 1 is the structural representation of the utility model heat accumulating type torpedo tank roasting device.
Fig. 2 is the structure enlarged diagram of the heat accumulating type air heat exchanger of heat accumulating type torpedo tank roasting device.
Fig. 3 is the structural representation of the accumulation of heat tube of heat accumulating type torpedo tank roasting device shown in Figure 2.
Fig. 4 is the left view of accumulation of heat tube shown in Figure 3.
Fig. 5 is the structural representation of the left wind guiding member of heat accumulating type air heat exchanger shown in Figure 2.
Fig. 6 is the right view of left wind guiding member shown in Figure 5.
Fig. 7 is the left view of left wind guiding member shown in Figure 5.
1. air intlets among the figure, 2. exhanst gas outlet, 3. left wind guiding member, 4. housing, 5. high-temperature flue gas outlet, 6. gas exit, 7. pipeline, 8. gas change heater, 9. gas inlet, 10. Gas Pipe, 11. torpedo covers, 12. inner chambers, 13. the torpedo jar, 4.T type burner, 15. outer tubes, 16. interior pipes, 17. smoke exhaust pipe, 18. pipelines, 19. emergency diffusion devices, 20. high-temperature flue gas imports, 21. air outlet slit, 22. right wind guiding members, 23. gas approach, 24. power transmission shafts, 25. the heat accumulating type air heat exchanger, 26. motors, 27. right side walls, 28. left side walls, 29. logical flue gas mouth, 30. round tubes, 31. volute bodies, 32. accumulation of heat tubes, 33. the ventilation cone, 34. supports, 35. arc-shaped racks, 36. gears, 37. demarcation strip, 38. ventilation cones, 39. demarcation strips, 40. axle sleeve, 41. cylinders, 42. cone spaces, 43. rotating shaft, 44. blow vents, 45. blowing air mouths.
The specific embodiment
Among Fig. 1, heat accumulating type torpedo tank roasting device, this device contain T type burner 14, Gas Pipe 10, smoke exhaust pipe 17, automatic ignition device, and be not shown in the figures.Pipe 16 and outer tube 15 in Gas Pipe 17 comprises.T type burner 14 is arranged in the inner chamber 12 of torpedo jar 13, and the left and right sides of T type burner 14 is equipped with burner, and Gas Pipe 17 front ends pass torpedo cover 11 and are connected with T type burner 14.One end of smoke exhaust pipe 17 is arranged on the torpedo cover 11 and with the inner chamber 12 of torpedo jar 13 and communicates.Heat accumulating type torpedo tank roasting device also contains heat accumulating type air heat exchanger 25 and gas change heater 8.As Fig. 2, shown in Figure 5, heat accumulating type air heat exchanger 25 contains left wind guiding member 3, right wind guiding member 22, accumulation of heat tube 32, arc-shaped rack 35, gear 36, power transmission shaft 24, motor 26.Left side wind guiding member 3 comprises ventilation cone 38, volute body 31, divides air duct.Divide air duct to constitute by round tube 30 and the even number demarcation strip 37 more than at least two, the width of demarcation strip 37 is identical with the length of round tube 30, the length of demarcation strip 37 is identical with the radius of round tube 30, demarcation strip 37 radially is arranged in the round tube 30 and evenly round tube 30 inside is divided into some even number cone spaces, and is interval with logical flue gas mouth 29 on the side of the corresponding round tube 30 of some even number cone spaces.In the present embodiment, demarcation strip 37 radially is arranged in the round tube 30 and evenly round tube 30 inside is divided into 16 cone spaces, has eight with the logical flue gas mouth 29 that is interval with on the side of 16 corresponding round tubes 30 of cone space.Divide on the inwall of left side wall 28 that the two ends of the round tube 30 of air duct are separately positioned on volute body 31 and right side wall 27.The right side wall 27 of volute body 31 is provided with and the corresponding blow vent 44 of round tube 30 inner some even number cone spaces, as shown in Figure 6.In the present embodiment, the right side wall 27 of volute body 31 is provided with round tube 30 inner 16 corresponding blow vents 44 of cone space 16.Be interval with on the left side wall 28 of volute body 31 and the corresponding position of round tube 30 inner some even number cone spaces air port 45 and with round tube 30 sides on be interval with logical flue gas mouth 29 and stagger, as Fig. 5, shown in Figure 7.In the present embodiment, the air port 45 that is interval with on 16 corresponding positions of cone space of the left side wall 28 of volute body 31 and round tube 30 inside has eight.The blowing air mouth 45 that volute body 31 left side walls 28 are provided with communicates with half blow vent 44 that volute body 31 right side walls 27 are provided with, and is interval with logical flue gas mouth 29 on second half blow vent 44 that volute body 31 right side walls 27 are provided with and round tube 30 sides and communicates.In the present embodiment, volute body 31 left side walls 28 are provided with eight blowing air mouths 45 and communicate with eight blow vents 44 that volute body 31 right side walls 27 are provided with, and are interval with eight logical flue gas mouths 29 in addition eight blow vents 44 that volute body 31 right side walls 27 are provided with and round tube 30 sides and communicate.Ventilation cone 38 is arranged on volute body 31 left side walls 28.As shown in Figure 3, Figure 4, accumulation of heat tube 32 contains cylinder 41, demarcation strip 39, axle sleeve 40 and rotating shaft 43, and rotating shaft 43 is installed in the axle sleeve 40 by bearing, and demarcation strip 39 radially is arranged between axle sleeve 40 and cylinder 41 inwalls.Demarcation strip 39 evenly is divided into cylinder 41 inside and divides the inner quantity of air duct identical cone space, and in the present embodiment, demarcation strip 39 is divided into 16 cone spaces with cylinder 41 inside, in each cone space of cylinder 41 inside heat storage is housed all.Arc-shaped rack 35 is arranged on the side of an end of cylinder 41.The symmetrical configuration of right wind guiding member 22 and left wind guiding member 3 is so no longer describe in detail.Accumulation of heat tube 32 is between left wind guiding member 3 and right wind guiding member 22, and left wind guiding member 3 and right wind guiding member 22 bottoms are respectively equipped with support 34.The two ends of the rotating shaft 43 of accumulation of heat tube 32 are separately positioned on the right side wall 27 of the left side wall of right wind guiding member 22 and left wind guiding member 3.The cone space of accumulation of heat tube 32 is corresponding with left wind guiding member blow vent 44 and left wind guiding member 22 blow vents, and the outside of accumulation of heat tube 32 is provided with housing 4.Power transmission shaft 24 1 ends pass left wind guiding member 3 and gear 36 are housed, this gear 36 be provided with arc-shaped rack 35 engagements on the accumulation of heat tube, the other end of power transmission shaft 24 and motor 26 link.Gas change heater 8 is a pipe heat exchanger, and this pipe heat exchanger contains high-temperature flue gas import 20, high-temperature flue gas outlet 5, gas inlet 9 and gas exit 6.In gas change heater 8, blast furnace gas passes through from the inside of its heat exchanger tube, and high-temperature flue gas passes through from the outside of heat exchanger tube.The other end of smoke exhaust pipe 17 is connected with the high-temperature flue gas import 20 of gas change heater 8 by pipeline 18, and the high-temperature flue gas of gas change heater 8 outlet 5 is connected by the gas approach 23 of pipeline 7 with the right wind guiding member 22 of heat accumulating type air heat exchanger 25.The exhanst gas outlet 2 of the left wind guiding member 3 of heat accumulating type air heat exchanger 25 is connected with blast pipe.The gas exit 6 of gas change heater 8 interlinks with the interior pipe 16 of Gas Pipe 10.The air outlet slit 21 of the right wind guiding member 22 ventilation cones 33 of heat accumulating type air heat exchanger 25 is connected with the outer tube 15 of Gas Pipe 10.For safety, the pipeline 18 that links to each other between the high-temperature flue gas import 20 of smoke exhaust pipe 17 and gas change heater 8 is provided with emergency diffusion device 19.In the present embodiment, automatic ignition device is the rod-type igniter of rising and falling, and the lifting lever top is equipped with two spark levers and is provided with location switch, receives behind the ignition signal igniter and drops to bit switch and open igniting, and when the fire inspection had fire, the successful lifting lever of lighting a fire lifted.During work, blast furnace gas enters the heat exchanger tube of gas change heater 8 inside from gas inlet 9, and the interior pipe 16 that enters Gas Pipe 10 from gas exit 6 arrives T type burners 14 again; High-temperature flue gas enters the periphery of the heat exchanger tube of gas change heater 8 inside through high-temperature flue gas import 20 from the outlet of smoke exhaust pipe 17, the blast furnace gas that passes through in heat exchanger tube is heated, enter volute body inside through the gas approach 23 of high-temperature flue gas outlet 5 by the right wind guiding member 22 of heat accumulating type air heat exchanger 25 then, the logical flue gas mouth that is interval with on minute air duct round tube side enters its inside, then half blow vent of the blow vent sum that is provided with by right wind guiding member 22 left side walls, enter in half the cone space of accumulation of heat tube 32 interior tapered spaces sums, for sake of convenience, here will enter half cone space of accumulation of heat tube 32 interior tapered spaces sums is the A space, second half cone space of sum is the B space, like this with its heat savings in the heat storage in A space, after half blow vent of blow vent 44 sums that left wind guiding member 3 right side walls are provided with, logical flue gas mouth 29 and exhanst gas outlet 2 enter blast pipe and discharge; Combustion air enters in the ventilation cone 38 from the air intlet 1 of the left wind guiding member 3 of heat accumulating type air heat exchanger 25, the blowing air mouth 45 that is provided with by volute body 31 left side walls then, and be provided with corresponding with it cone space through minute air duct round tube 30 inside, second half blow vent of blow vent 44 sums that are provided with from volute body 31 right side walls, enter in second half the cone space of accumulation of heat tube 32 interior tapered spaces sums, be in the B space, at this moment the combustion air heat that absorbs heat storage in the B space increases substantially self temperature, the temperature of combustion air will reach about 1000 ℃, and the final high temperature combustion air enters into heat exchanger 8 arrival T type burners 14 from the air outlet slit of right wind guiding member 22.When the temperature of exhanst gas outlet 2 is higher than setting value, motor 26 drives power transmission shaft 24 and rotates, the arc-shaped rack 35 that gear 36 on the power transmission shaft 24 drives on the accumulation of heat tube 32, accumulation of heat tube 32 is rotated, the two-port in the A space of accumulation of heat tube 32 is corresponding with 45 in blowing air mouth, at this moment combustion air has then held in the A space and has absorbed heat the heat storage of full heat and self temperature is increased substantially, simultaneously the B space of accumulation of heat tube 32 has forwarded to and gas approach 23 position of communications and liaison mutually, and high-temperature flue gas carries out accumulation of heat to the storage heater in the B space like this.The heating of above-mentioned combustion air realizes by the A space of accumulation of heat tube 32 and the cyclic transformation in B space, promptly when high-temperature flue gas carries out accumulation of heat by the A space to the heat storage in it, combustion air then absorbs in it heat of heat storage by the B space significantly improves self temperature; By the rotation of accumulation of heat tube 32, when high-temperature flue gas carried out accumulation of heat by the B space to the heat storage in it, combustion air then absorbs in it heat of heat storage by the A space significantly improved self temperature.The utility model is owing to adopted heat accumulating type air heat exchanger 25 and gas change heater 8, this high-temperature flue gas that not only can utilize torpedo jar 13 to produce in bake process heats blast furnace gases by gas change heater 8, and alternately heats combustion air by heat accumulating type air heat exchanger 25.Combustion air and blast furnace gas enough can reach respectively about 1000 ℃ and about 300 ℃ by heating its temperature, and the temperature that is produced when by 14 burnings of T type burner has reached 1300 ℃, so fast baking.Because the waste heat of 25 pairs of high-temperature flue gas of heat accumulating type air heat exchanger is accumulated, its discharged flue gas temperature is lower than 150 ℃, facts have proved, can save coal gas more than 50%.
Claims (3)
1. heat accumulating type torpedo tank roasting device, this device contains T type burner, Gas Pipe, smoke exhaust pipe, automatic ignition device, pipe and outer tube in Gas Pipe comprises, T type burner is arranged in the inner chamber of torpedo jar, the left and right sides of T type burner is equipped with burner, the Gas Pipe front end passes the torpedo cover and is connected with T type burner, one end of smoke exhaust pipe is arranged on the torpedo cover and with the inner chamber of torpedo jar and communicates, it is characterized in that: also contain heat accumulating type air heat exchanger and gas change heater, the heat accumulating type air heat exchanger contains left wind guiding member, right wind guiding member, the accumulation of heat tube, arc-shaped rack, gear, power transmission shaft, motor, left side wind guiding member comprises the ventilation cone, volute body, divide air duct, divide air duct to constitute by round tube and the even number demarcation strip more than at least two, the width of demarcation strip is identical with the length of round tube, the length of demarcation strip is identical with the radius of round tube, demarcation strip radially is arranged in the round tube, and evenly round tube inside is divided into some even number cone spaces, with be interval with logical flue gas mouth on the side of the corresponding round tube of some even number cone spaces, divide on the inwall of left side wall that the two ends of the round tube of air duct are separately positioned on volute body and right side wall, the right side wall of volute body is provided with and the corresponding blow vent of the inner some even number cone spaces of round tube, be interval with on the corresponding position of the inner some even number cone spaces of the left side wall of volute body and round tube the air port and with the round tube side on the logical flue gas mouth that is interval with stagger, the blowing air mouth that the volute body left side wall is provided with communicates with half blow vent that the volute body right side wall is provided with, the logical flue gas mouth that is interval with on second half blow vent that the volute body right side wall is provided with and the round tube side communicates, the ventilation cone is arranged on the volute body left side wall, the accumulation of heat tube contains cylinder, demarcation strip, axle sleeve and rotating shaft, rotating shaft is installed in the axle sleeve by bearing, demarcation strip radially is arranged between axle sleeve and the cylinder inner wall, demarcation strip evenly is divided into cylinder interior and divides the inner quantity of air duct identical cone space, in each cone space of cylinder interior heat storage is housed all, arc-shaped rack is arranged on the side of an end of cylinder, the symmetrical configuration of right wind guiding member and left wind guiding member, the accumulation of heat tube is between left wind guiding member and right wind guiding member, the bottom of left side wind guiding member and right wind guiding member is respectively equipped with support, the two ends of the rotating shaft of accumulation of heat tube are separately positioned on the right side wall of the left side wall of right wind guiding member and left wind guiding member, the cone space of accumulation of heat tube is corresponding with left wind guiding member blow vent and left wind guiding member blow vent, the outside of accumulation of heat tube is provided with housing, power transmission shaft one end passes left wind guiding member and described gear is housed, this gear be provided with on the accumulation of heat tube arc-shaped rack engagement, the other end and the motor of power transmission shaft link; Gas change heater is a pipe heat exchanger, and this pipe heat exchanger contains high-temperature flue gas import, high-temperature flue gas outlet, gas inlet and gas exit; The other end of described smoke exhaust pipe is connected with the high-temperature flue gas import of gas change heater by pipeline, the high-temperature flue gas outlet of gas change heater is connected by the gas approach of pipeline with the right wind guiding member of heat accumulating type air heat exchanger, the exhanst gas outlet of the left wind guiding member of heat accumulating type air heat exchanger is connected with blast pipe, the interior pipe of the gas exit of gas change heater and described Gas Pipe interlinks, and the air outlet slit of the right wind guiding member ventilation of heat accumulating type air heat exchanger cone and the outer tube of described Gas Pipe are connected.
2. heat accumulating type torpedo tank roasting device according to claim 1 is characterized in that: the pipeline that links to each other between the high-temperature flue gas import of described smoke exhaust pipe and gas change heater is provided with the emergency diffusion device.
3. heat accumulating type torpedo tank roasting device according to claim 1, it is characterized in that: described automatic ignition device is the rod-type igniter of rising and falling, the lifting lever top is equipped with two spark levers and is provided with location switch, receiving behind the ignition signal igniter drops to bit switch and opens igniting, when the fire inspection had fire, the successful lifting lever of lighting a fire lifted.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200223562U CN201592246U (en) | 2010-01-21 | 2010-01-21 | Heat-accumulating type torpedo car baking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010200223562U CN201592246U (en) | 2010-01-21 | 2010-01-21 | Heat-accumulating type torpedo car baking device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201592246U true CN201592246U (en) | 2010-09-29 |
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ID=42774309
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010200223562U Expired - Lifetime CN201592246U (en) | 2010-01-21 | 2010-01-21 | Heat-accumulating type torpedo car baking device |
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| Country | Link |
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| CN (1) | CN201592246U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106363161A (en) * | 2016-11-21 | 2017-02-01 | 大连新瑞晨环保科技有限公司 | Efficient ladle baking device |
-
2010
- 2010-01-21 CN CN2010200223562U patent/CN201592246U/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106363161A (en) * | 2016-11-21 | 2017-02-01 | 大连新瑞晨环保科技有限公司 | Efficient ladle baking device |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20100929 Effective date of abandoning: 20100121 |