CN215628078U - Low-silicon low-sulfur molten iron smelting device - Google Patents
Low-silicon low-sulfur molten iron smelting device Download PDFInfo
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- CN215628078U CN215628078U CN202121432364.9U CN202121432364U CN215628078U CN 215628078 U CN215628078 U CN 215628078U CN 202121432364 U CN202121432364 U CN 202121432364U CN 215628078 U CN215628078 U CN 215628078U
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Abstract
The utility model discloses a low-silicon low-sulfur molten iron smelting device which comprises a blast furnace, an oxygen enrichment manufacturing machine and a control box, wherein a ring pipe is sleeved on the outer surface of the blast furnace close to the bottom end of the blast furnace, a hot air nozzle is installed at the bottom end of the ring pipe, a fan is installed at the top end of the control box, a hot air furnace is installed at the output end of the fan, a hot air pipe is installed at the output end of the hot air furnace, a three-way pipe B is installed at the tail end of the hot air pipe, a connecting pipe is installed on one side, away from the hot air furnace, of the three-way pipe B, a three-way pipe A is installed at the tail end of the connecting pipe, an input pipe is installed on one side, away from the connecting pipe, of the three-way pipe A, and the tail end of the input pipe is connected to the outer surface of the ring pipe. The utility model reduces the theoretical combustion temperature of the tuyere of the blast furnace by humidifying and oxygenating the hot air conveyed into the blast furnace and utilizing thermal decomposition so as to improve the top pressure of the blast furnace, is beneficial to reducing the silicon and sulfur content in molten iron, and can recycle the waste heat in furnace gas discharged by the blast furnace and reduce energy consumption.
Description
Technical Field
The utility model relates to the technical field of molten iron smelting devices, in particular to a low-silicon low-sulfur molten iron smelting device.
Background
The blast furnace uses steel plate as furnace shell, and refractory brick lining is built in the shell. The blast furnace body is divided into a furnace throat, a furnace body, a furnace waist, a furnace belly and a furnace hearth 5 from top to bottom. Because of the advantages of good economic index, simple process, large production capacity, high labor production efficiency, low energy consumption and the like of the blast furnace ironmaking technology, the iron produced by the method accounts for the vast majority of the total iron production in the world.
Among the various element components of the molten iron, silicon is a main heating element, and silicon is also a main slagging element, and the silicon in the molten iron often has great influence on converter smelting, so that splashing is easily generated in the operation process, and the corrosion to a converter lining is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a low-silicon low-sulfur molten iron smelting device which has the advantages that hot air conveyed to the interior of a blast furnace is humidified and oxygenated, the theoretical combustion temperature of a blast furnace tuyere is reduced by utilizing thermal decomposition, so that the top pressure of the blast furnace is improved, the content of silicon and sulfur in molten iron is favorably reduced, the waste heat in furnace gas exhausted by the blast furnace can be recycled, and the energy consumption is reduced.
In order to achieve the purpose, the utility model provides the following technical scheme: the utility model provides a low-silicon low-sulfur molten iron smelting device, includes blast furnace, oxygen boosting machine and control box, blast furnace outer surface is close to bottom position department and has cup jointed the ring pipe, the hot-blast tuyere is installed to the ring pipe bottom, the fan is installed on the control box top, the hot-blast furnace is installed to the fan output, the hot-blast furnace is installed to the hot-blast furnace output, and the hot-blast pipe end installs three-way pipe B, three-way pipe B deviates from one side of hot-blast furnace and installs the connecting pipe, and the connecting pipe end installs three-way pipe A, three-way pipe A deviates from one side of connecting pipe and installs the input tube, and input tube end-to-end connection is in ring pipe surface.
Preferably, an oxygen regulating valve is installed at the bottom end of the three-way pipe B, an oxygen-enriched manufacturing machine is installed at the bottom end of the oxygen regulating valve, and an oxygen detector is installed inside the connecting pipe.
Preferably, the blast furnace outer surface is close to top position department and installs the stove gas pipe, and the stove gas pipe end installs the dust removal case, dust removal incasement surface mounting has the speed reduction board, dust removal incasement portion bottom intermediate position department installs the filter screen.
Preferably, the dust removal incasement portion bottom is close to one side of blast furnace and installs the slag guide, the dust removal case is close to blast furnace one side bottom position department and installs the scum pipe, and scum pipe internally mounted has the sediment valve, vibrating motor is installed to the dust removal bottom of the case portion.
Preferably, the dust removal case deviates from one side of row's sediment pipe and is close to bottom position department and installs the outlet duct, the heat transfer tube dish is installed to the outlet duct end, and the blast pipe is installed to heat transfer tube dish end.
Preferably, the interior of the input pipe is provided with a humidity sensor, the bottom end of the three-way pipe A is provided with a steam regulating valve, and the bottom end of the steam regulating valve is provided with a humidifying box.
Preferably, the heating plate is installed at the bottom end inside the humidification box, a water inlet pipe is installed at one side, close to the oxygen enrichment manufacturing machine, of the top end of the humidification box, and a water inlet valve is installed inside the water inlet pipe.
Compared with the prior art, the utility model has the following beneficial effects:
1. the utility model achieves the effects of humidifying and oxygenating the hot air conveyed to the interior of the blast furnace by arranging the oxygen enrichment manufacturing machine and the humidifying box, reducing the theoretical combustion temperature of the tuyere of the blast furnace by utilizing thermal decomposition so as to improve the top pressure of the blast furnace, and being beneficial to reducing the silicon and sulfur content in molten iron.
2. The utility model achieves the effects of recycling waste heat in furnace gas discharged by the blast furnace and reducing energy consumption by arranging the heat exchange tube disc and the dust removal box, simultaneously, the furnace gas discharged by the blast furnace enters the dust removal box through the furnace gas tube, humidifying water entering the heat exchange tube disc and the humidifying box after being decelerated by the decelerating plate and dedusted by the filter screen exchanges heat through the tube wall, steam enters the three-way tube A through the steam regulating valve to be mixed with hot air, and the oxygen enrichment manufacturing machine enters the three-way tube B through the oxygen regulating valve to be mixed with the hot air.
Drawings
FIG. 1 is a schematic front view of the present invention;
FIG. 2 is a schematic view of a partial front view of the oxygen enrichment manufacturing machine of the present invention;
FIG. 3 is a schematic view of a local main view structure of the dust removing box of the present invention;
FIG. 4 is a schematic view of a partial front view of a humidifying box according to the present invention;
fig. 5 is a schematic top view of the heat exchange tube tray of the present invention.
In the figure: 1. a fan; 2. a hot blast stove; 3. a hot air pipe; 4. a three-way pipe A; 5. an input tube; 6. a dust removal box; 7. a furnace gas pipe; 8. a humidity sensor; 9. a blast furnace; 10. an annular tube; 11. a hot air nozzle; 12. a humidifying box; 13. an oxygen-enriched manufacturing machine; 14. a control box; 15. a three-way pipe B; 16. an oxygen detector; 17. a connecting pipe; 18. an oxygen regulating valve; 19. a speed reduction plate; 20. filtering with a screen; 21. a slag discharge valve; 22. a slag discharge pipe; 23. a slag guide plate; 24. a vibration motor; 25. an air outlet pipe; 26. a water inlet pipe; 27. a steam regulating valve; 28. an exhaust pipe; 29. a heat exchange tube coil; 30. heating plates; 31. a water inlet valve.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1 to 5, the present invention provides a technical scheme of a low-silicon low-sulfur molten iron smelting apparatus: the utility model provides a low-silicon low-sulfur molten iron smelting device, including blast furnace 9, oxygen boosting machine 13 and control box 14, 9 outer surfaces of blast furnace are close to bottom position department and have cup jointed annular pipe 10, hot-blast tuyere 11 is installed to annular pipe 10 bottom, fan 1 is installed on 14 tops of control box, hot-blast furnace 2 is installed to 1 output of fan, hot-blast furnace 3 is installed to 2 output of hot-blast furnace, and 3 ends of hot-blast furnace install three-way pipe B15, oxygen regulating valve 18 is installed to three-way pipe B15 bottom, oxygen boosting machine 13 is installed to 18 bottoms of oxygen regulating valve, connecting pipe 17 internally mounted has oxygen detector 16, oxygen detector 16 and oxygen regulating valve 18 set up can control the oxygen concentration of inputing to the inside hot-blast of blast furnace 9.
Connecting pipe 17 is installed to one side that three-way pipe B15 deviates from hot-blast furnace 2, and connecting pipe 17 end is installed three-way pipe A4, steam control valve 27 is installed to three-way pipe A4 bottom, humidification case 12 is installed to steam control valve 27 bottom, humidification case 12 can carry the inside hot-blast humidification of blast furnace 9, thereby reduce the theoretical combustion temperature in the 9 wind gaps of blast furnace and improve the top pressure of blast furnace 9, be favorable to reducing silicon sulfur content in the molten iron, input tube 5 is installed to one side that three-way pipe A4 deviates from connecting pipe 17, 5 internally mounted in humidity transducer 8 of input tube, humidity transducer 8 and steam control valve 27 can control the inside hot-blast humidity of blast furnace 9 of carrying, and 5 end-to-ends connection of input tube is in the surface of ring pipe 10.
Referring to fig. 1, 3, 4 and 5, the present invention provides a technical scheme of a low-silicon low-sulfur molten iron smelting apparatus: the utility model provides a low-silicon low-sulfur molten iron smelting device, including blast furnace 9, oxygen boosting makes 13 and control box 14, 9 outer surfaces of blast furnace are close to bottom position department and have cup jointed annular pipe 10, hot-blast tuyere 11 is installed to annular pipe 10 bottom, fan 1 is installed on 14 tops of control box, hot-blast furnace 2 is installed to 1 output of fan, hot-blast furnace 2 output end installs hot-blast main 3, and 3 ends of hot-blast main install three-way pipe B15, connecting pipe 17 is installed to one side that three-way pipe B15 deviates from hot-blast furnace 2, and connecting pipe 17 end installs three-way pipe A4, input tube 5 is installed to one side that three-way pipe A4 deviates from connecting pipe 17, and 5 end-to-ends connection of input tube is in annular pipe 10 outer surfaces.
A furnace gas pipe 7 is arranged on the outer surface of the blast furnace 9 near the top end, a dust removal box 6 is arranged at the tail end of the furnace gas pipe 7, a speed reducing plate 19 is arranged on the inner surface of the dust removal box 6, the speed reducing plate 19 can reduce the speed of the furnace gas, a filter screen 20 is arranged at the middle position of the bottom end in the dust removal box 6, the filter screen 20 can filter dust in the furnace gas, a slag guide plate 23 is arranged at one side of the bottom end in the dust removal box 6 near the blast furnace 9, the slag guide plate 23 is arranged to facilitate the discharge of the filtered dust through a slag discharge pipe 22, a slag discharge pipe 22 is arranged at the bottom end of the dust removal box 6 near the blast furnace 9, a slag discharge valve 21 is arranged in the slag discharge pipe 22, a vibration motor 24 is arranged at the bottom end of the dust removal box 6, an air outlet pipe 25 is arranged at the position of one side of the dust removal box 6 far away from the slag discharge pipe 22 near the bottom end, a heat exchange pipe disc 29 is arranged at the tail end of the air outlet pipe, the heat exchange pipe disc 29 can replace the waste heat in the furnace gas, an exhaust pipe 28 is arranged at the tail end of the heat exchange pipe disc 29, a heating plate 30 is arranged at the bottom end inside the humidifying box 12, a water inlet pipe 26 is arranged at one side, close to the oxygen enrichment manufacturing machine 13, of the top end of the humidifying box 12, and a water inlet valve 31 is arranged inside the water inlet pipe 26.
The working principle is as follows: the utility model is arranged at a place needing to be used, external air is conveyed into a hot blast stove 2 by a fan 1, then the heated air is output into a blast furnace 9, meanwhile, furnace gas discharged by the blast furnace 9 enters a dust removal box 6 through a furnace gas pipe 7, the furnace gas is decelerated by a decelerating plate 19 and dedusted by a filter screen 20, then the furnace gas enters a heat exchange pipe disc 29 and is subjected to heat exchange with humidifying water in a humidifying box 12 through a pipe wall, steam enters a three-way pipe A4 through a steam regulating valve 27 and is mixed with hot air, an oxygen enrichment manufacturing machine 13 enters a three-way pipe B15 through an oxygen regulating valve 18 and is mixed with the hot air, and the working flow of the utility model is completed.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. A low-silicon low-sulfur molten iron smelting device comprises a blast furnace (9), an oxygen enrichment manufacturing machine (13) and a control box (14), and is characterized in that: blast furnace (9) surface is close to bottom position department and has cup jointed annular pipe (10), hot-blast tuyere (11) are installed to annular pipe (10) bottom, fan (1) is installed on control box (14) top, hot-blast furnace (2) are installed to fan (1) output, hot-blast furnace (2) output is installed hot-blast main (3), and hot-blast main (3) end installs three-way pipe B (15), connecting pipe (17) are installed to one side that three-way pipe B (15) deviate from hot-blast furnace (2), and connecting pipe (17) end installs three-way pipe A (4), input tube (5) are installed to one side that three-way pipe A (4) deviate from connecting pipe (17), and input tube (5) end-to-end connection in annular pipe (10) surface.
2. The smelting device of molten iron with low silicon and low sulfur according to claim 1, characterized in that: an oxygen regulating valve (18) is installed at the bottom end of the three-way pipe B (15), an oxygen-enriched manufacturing machine (13) is installed at the bottom end of the oxygen regulating valve (18), and an oxygen detector (16) is installed inside the connecting pipe (17).
3. The smelting device of molten iron with low silicon and low sulfur according to claim 1, characterized in that: blast furnace (9) surface is close to top position department and installs stove trachea (7), and stove trachea (7) end installs dust removal case (6), dust removal case (6) internal surface mounting has speed damper (19), filter screen (20) are installed to the inside bottom intermediate position department of dust removal case (6).
4. The smelting device of low-silicon low-sulfur molten iron according to claim 3, characterized in that: dust removal case (6) inside bottom is close to one side of blast furnace (9) and installs slag guide plate (23), dust removal case (6) are close to blast furnace (9) one side bottom position department and install slag discharging pipe (22), and slag discharging pipe (22) internally mounted has slag discharging valve (21), vibrating motor (24) are installed to dust removal case (6) bottom.
5. The smelting device of low-silicon low-sulfur molten iron according to claim 4, wherein: dust removal case (6) deviate from one side of row's cinder pipe (22) and are close to bottom position department and install outlet duct (25), heat exchange tube dish (29) are installed to outlet duct (25) end, and exhaust pipe (28) are installed to heat exchange tube dish (29) end.
6. The smelting device of molten iron with low silicon and low sulfur according to claim 1, characterized in that: the humidifier is characterized in that the input pipe (5) is internally mounted on the humidity sensor (8), the bottom end of the three-way pipe A (4) is provided with a steam regulating valve (27), and the bottom end of the steam regulating valve (27) is provided with a humidifying box (12).
7. The smelting device of low-silicon low-sulfur molten iron according to claim 6, characterized in that: heating plate (30) are installed to humidification case (12) inside bottom, humidification case (12) top is close to one side of oxygen boosting machine (13) and is installed inlet tube (26), and inlet tube (26) internally mounted has water intaking valve (31).
Priority Applications (1)
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CN202121432364.9U CN215628078U (en) | 2021-06-27 | 2021-06-27 | Low-silicon low-sulfur molten iron smelting device |
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CN202121432364.9U CN215628078U (en) | 2021-06-27 | 2021-06-27 | Low-silicon low-sulfur molten iron smelting device |
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CN215628078U true CN215628078U (en) | 2022-01-25 |
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CN202121432364.9U Active CN215628078U (en) | 2021-06-27 | 2021-06-27 | Low-silicon low-sulfur molten iron smelting device |
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2021
- 2021-06-27 CN CN202121432364.9U patent/CN215628078U/en active Active
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