CN116951987B - Air impact type powder dispersing device, method and reaction melting furnace applied to furnace mouth feeding pipe - Google Patents
Air impact type powder dispersing device, method and reaction melting furnace applied to furnace mouth feeding pipe Download PDFInfo
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- CN116951987B CN116951987B CN202311201492.6A CN202311201492A CN116951987B CN 116951987 B CN116951987 B CN 116951987B CN 202311201492 A CN202311201492 A CN 202311201492A CN 116951987 B CN116951987 B CN 116951987B
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- enriched gas
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- 239000000843 powder Substances 0.000 title claims abstract description 58
- 238000006243 chemical reaction Methods 0.000 title claims abstract description 16
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000002844 melting Methods 0.000 title abstract description 3
- 230000008018 melting Effects 0.000 title abstract description 3
- 239000002994 raw material Substances 0.000 claims abstract description 119
- 239000002184 metal Substances 0.000 claims abstract description 113
- 229910052751 metal Inorganic materials 0.000 claims abstract description 113
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000001301 oxygen Substances 0.000 claims abstract description 78
- 229910052760 oxygen Inorganic materials 0.000 claims abstract description 78
- 239000007789 gas Substances 0.000 claims abstract description 77
- 238000003723 Smelting Methods 0.000 claims abstract description 31
- 238000007664 blowing Methods 0.000 claims abstract description 20
- 239000000463 material Substances 0.000 claims description 20
- 238000001816 cooling Methods 0.000 claims description 7
- 238000010009 beating Methods 0.000 claims description 4
- 238000012216 screening Methods 0.000 claims description 4
- 238000010926 purge Methods 0.000 claims description 3
- 238000000790 scattering method Methods 0.000 claims description 3
- 238000007789 sealing Methods 0.000 claims description 3
- 239000012255 powdered metal Substances 0.000 abstract description 7
- 230000004927 fusion Effects 0.000 abstract description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 12
- 238000012546 transfer Methods 0.000 description 7
- 238000005516 engineering process Methods 0.000 description 6
- 229910052742 iron Inorganic materials 0.000 description 6
- 239000007788 liquid Substances 0.000 description 5
- 230000009286 beneficial effect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000036632 reaction speed Effects 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 239000002893 slag Substances 0.000 description 2
- 235000019738 Limestone Nutrition 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 239000013043 chemical agent Substances 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000007667 floating Methods 0.000 description 1
- 238000005188 flotation Methods 0.000 description 1
- 230000004907 flux Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- 239000010410 layer Substances 0.000 description 1
- 239000006028 limestone Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000013178 mathematical model Methods 0.000 description 1
- 239000011707 mineral Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 238000006276 transfer reaction Methods 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D3/00—Charging; Discharging; Manipulation of charge
- F27D3/18—Charging particulate material using a fluid carrier
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
- F27B14/00—Crucible or pot furnaces
- F27B14/08—Details peculiar to crucible or pot furnaces
- F27B14/0806—Charging or discharging devices
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The invention discloses a wind impact type powder dispersing device and method applied to a furnace mouth feeding pipe and a reaction melting furnace, and relates to the technical field of smelting furnaces. When the powdery metal raw material is introduced, the oxygen-enriched gas blown from the air duct side-blowing air duct is directly blocked by the outer wall of the charging barrel, so that the oxygen-enriched gas does not directly interfere with the powdery metal raw material, and the phenomenon that the powdery metal raw material is blown to the inner wall of the charging pipe of the furnace mouth by the oxygen-enriched gas from the lateral direction to cause fusion bonding is avoided. And the air gap flow channel formed between the air duct and the charging barrel is used for containing the oxygen-enriched gas, so that the oxygen-enriched gas is downwards along the air gap flow channel, and the flow direction of the oxygen-enriched gas is changed. The powdered metal raw material can quickly pass through the feeding pipe by means of downward flowing force of oxygen-enriched gas, and enter the furnace to perform smelting reaction, so that the powdered metal raw material is not easy to float to the inner wall of the feeding pipe, and fusion bonding is caused.
Description
Technical Field
The invention relates to the technical field of smelting furnaces, in particular to a wind impact type powder dispersing device applied to a furnace mouth feeding pipe.
Background
In the nonferrous smelting industry, the metal in the ore is extracted by roasting, smelting, electrolysis or using chemical agents, and along with the research on smelting, a new smelting technology as disclosed in the invention of U.S. patent No. 8747524B2 appears, and the principle of the new smelting technology is as follows: the powdery metal raw material is introduced from a feed pipe at the furnace mouth, so that the powdery metal raw material flows into the furnace to carry out high-temperature reaction.
The technology disclosed in the above U.S. patent has the defects that the powdery metal raw material is easy to agglomerate, and through research, the surface layer of the agglomerated metal raw material is quickly melted to form a powder mass wrapped by a layer of molten liquid, the powder mass wrapped by the molten liquid is difficult to blow off by air flow in a furnace, and the high-temperature air flow heat transfer reaction speed between the inside and the outside of the powder mass is very slow. Taking iron making as an example, the powdery metal raw materials comprise iron ore powder and powdery flux minerals (limestone). The high-temperature gas in the furnace is high-temperature reducing gas containing CO and H2, the powdery metal raw material is dispersed in the high-temperature reducing gas in the furnace, the heat and mass transfer efficiency is very high, and the high-temperature reducing gas can be quickly melted into a liquid state and reduced to separate out liquid iron and slag in the molten state. However, the reaction speed of mass transfer and heat transfer between the iron ore powder in the powder mass wrapped by the molten liquid and the external high-temperature reducing gas is very slow, and the iron contained in the powder mass is not fully reduced and refined, so that the iron ore powder becomes slag and is wasted.
Therefore, a more excellent rotary flotation smelting technology is studied, referring to fig. 1, when a process air pipe 2 is inserted at the side of a feed pipe of a smelting furnace 1, and powdery metal raw materials pass through the feed pipe, oxygen-enriched gas is blown from the process air pipe 2 into the feed pipe, and the oxygen-enriched gas is mixed with the metal raw materials, so that the heat transfer and mass transfer processes in smelting can be enhanced.
Based on the rotary float smelting technology, a mathematical model of a cyclone pulse type nozzle and intelligent production and a corresponding computer on-line control system are developed at present, so that the rotary float intelligent smelting and the self-heating smelting are realized.
However, the cyclone smelting technology has a non-negligible problem, namely that the powdery metal raw material is in a floating state, when passing through a high-temperature furnace mouth feeding pipe, the feeding pipe can be bonded with the molten powdery metal raw material, and when the feeding pipe is purged laterally by oxygen-enriched gas, the condition that the feeding pipe is bonded with the molten powdery metal raw material is aggravated.
Disclosure of Invention
The invention aims to solve the problem that a furnace mouth feeding pipe can adhere to a powder metal raw material in a falling state in the prior art.
The second object of the present invention is to provide a powder dispersing method.
It is a further object of the present invention to provide a reaction furnace.
In order to achieve one of the above purposes, the present invention adopts the following technical scheme: the utility model provides a be applied to wind formula powder ware that looses of fire door inlet pipe, wind formula powder ware that looses install in the inlet pipe, wind formula powder ware that looses includes dryer and the feed cylinder of concentric configuration, the dryer with be formed with the windage runner between the feed cylinder.
The bottom of the air duct is provided with a nozzle which is communicated with the air gap runner, the material channel of the charging barrel is communicated with the nozzle, and the nozzle is communicated with the feeding pipe.
The air-impact type powder dispersing device further comprises a blowing air pipe, the blowing air pipe laterally penetrates through the feeding pipe and the air duct, and the blowing air pipe is communicated with the air gap runner.
The mouth of pipe of blowing tuber pipe is towards the outer wall of feed cylinder.
In the technical scheme, when the embodiment of the invention is used, the powdery metal raw material is guided into the charging barrel in the furnace mouth feeding pipe, and the oxygen-enriched gas is blown into the air gap flow passage through the blowing air pipe to cool the air barrel in an air-cooling way.
Oxygen-enriched gas is filled in the air gap flow passage, flows along the lower part of the air gap flow passage and is concentrated to blow to the air duct nozzle from the periphery of the charging barrel.
The air flow of the nozzle flows downwards, the air flow in the charging barrel is pulled to accelerate the downward flow, the powder metal raw material in the charging barrel is driven to accelerate the downward flow, when the powder metal raw material flows into the nozzle of the air barrel, the oxygen-enriched gas blown to the nozzle is wrapped and clamped, the oxygen-enriched gas impacts the powder metal raw material below the nozzle, the powder metal raw material is impacted by the oxygen-enriched gas from different directions around, the powder metal raw material is not contacted with the inner wall of the feeding pipe, and the agglomerated powder metal raw material can be impacted to scatter the agglomerated powder metal raw material.
The powdery metal raw material is wrapped by downward oxygen-enriched gas and enters a smelting furnace through a feeding pipe to carry out smelting reaction.
Further, in the embodiment of the invention, the air duct is sleeved on the outer wall of the material cylinder, the air duct is in threaded connection with the material cylinder, and the upper end of the air duct and the material cylinder are of a closed structure.
Further, in the embodiment of the invention, the feeding pipe is provided with a boss, the outer wall of the upper end of the air cylinder is provided with an outwardly extending edge table, and the edge table is in sealing lap joint with the boss.
Further, in the embodiment of the invention, the lower end of the charging barrel is of a conical section structure, the lower end of the air duct is of a narrow section structure, the conical section and the narrow section have different conicities, and the air gap flow passage formed between the conical section and the narrow section is narrowed by a wide width. The flow speed of the oxygen-enriched gas blown out from the air gap flow passage is accelerated to increase the impact force on the powdery metal raw material so as to collide and scatter the agglomerated powdery metal raw material.
Further, in the embodiment of the invention, a circular cavity is formed on the outer wall surface of the lower end of the charging barrel, a chute is formed on the side surface of the circular cavity, and the chute is communicated with the circular cavity through a hole and a slot.
The circular cavity is rotationally connected with a wind wheel, blades of the wind wheel are exposed in the air gap flow channel, and magnetic sheets are arranged on the blades of the wind wheel.
The sliding chute is connected with a sliding plug in a sliding way, a magnet is arranged on the end face, opposite to the wind wheel, of the sliding plug, a spring is arranged between the sliding plug and the sliding chute, and the sliding plug is provided with a wedge-shaped rod.
The sieve is arranged in the material channel, a screen is arranged in the sieve, the screen is embedded into an annular groove formed in the side face of the material channel, a wedge-shaped block is arranged at the bottom of the sieve, and the wedge-shaped end face of the wedge-shaped block is contacted with the wedge-shaped end face of the wedge-shaped rod.
Further, in the embodiment of the invention, when the magnetic sheet and the magnet are in surface-to-surface correspondence through the hole groove, the magnetic sheet and the magnet are in homopolar repulsion.
The beneficial effects of the invention are as follows:
firstly, when the powdery metal raw material is introduced, the air duct and the charging barrel are concentrically arranged, and the oxygen-enriched gas blown from the air duct side blowing air duct is directly blocked by the outer wall of the charging barrel, so that the oxygen-enriched gas does not directly interfere the powdery metal raw material, and the phenomenon that the powdery metal raw material is blown to the inner wall of the charging pipe of the furnace mouth by the oxygen-enriched gas from the side direction to cause fusion bonding is avoided.
Secondly, the air gap flow channel formed between the air duct and the charging barrel is used for containing oxygen-enriched gas, so that the oxygen-enriched gas is downwards along the air gap flow channel, and the flow direction of the oxygen-enriched gas is changed. The powdered metal raw material can quickly pass through the feeding pipe by means of downward flowing force of oxygen-enriched gas, and enter the furnace to perform smelting reaction, so that the powdered metal raw material is not easy to float to the inner wall of the feeding pipe, and fusion bonding is caused.
Third, the annular air gap flow passage is positioned above the side of the nozzle, when oxygen-enriched gas is blown to the nozzle of the air duct and contacts with the powdery metal raw material falling into the nozzle from the charging barrel, the metal raw material is subjected to first impact of the oxygen-enriched gas from the position above the different sides, the impact drives the metal raw material downwards and tends to the center below the nozzle, and when oxygen-enriched gas from the position above the different sides contacts, second impact is caused on the powdery metal raw material to collide and scatter the agglomerated powdery metal raw material. In this way, the heat and mass transfer process in smelting can be improved.
In order to achieve the second purpose, the invention adopts the following technical scheme: a powder scattering method based on the air-shot powder scattering device of the furnace mouth feeding pipe in one of the above objects, comprising the steps of:
the method comprises the steps of guiding powdery metal raw materials into a charging barrel in a furnace mouth charging pipe, blowing oxygen-enriched gas into an air gap runner through a blowing air pipe, and cooling the air barrel in an air-cooling way.
Oxygen-enriched gas is filled in the air gap flow passage, flows along the lower part of the air gap flow passage and is concentrated to blow to the air duct nozzle from the periphery of the charging barrel.
The air flow of the nozzle flows downwards, the air flow in the charging barrel is pulled to accelerate the downward flow, the powder metal raw material in the charging barrel is driven to accelerate the downward flow, when the powder metal raw material flows into the nozzle of the air barrel, the oxygen-enriched gas blown to the nozzle is wrapped and clamped, the oxygen-enriched gas impacts the powder metal raw material below the nozzle, the powder metal raw material is impacted by the oxygen-enriched gas from different directions around, the powder metal raw material is not contacted with the inner wall of the feeding pipe, and the agglomerated powder metal raw material can be impacted to scatter the agglomerated powder metal raw material.
The powdery metal raw material is wrapped by downward oxygen-enriched gas and enters a smelting furnace through a feeding pipe to carry out smelting reaction.
Further, in the embodiment of the invention, in the step, the taper of the conical section at the lower end of the charging barrel is different from the taper of the narrow-direction section at the lower end of the air duct, and the air gap flow passage formed between the conical section and the narrow-direction section is narrowed by a wide width, so that the flow speed of oxygen-enriched gas blown out from the air gap flow passage is accelerated, and the impact force on the powdery metal raw material is increased to collide and scatter the agglomerated powdery metal raw material.
Further, in the embodiment of the invention, in the above steps, when the powdery metal raw material entering the charging barrel falls into the sieve in the lower end of the charging barrel, the oxygen-enriched gas flowing downwards in the air gap flow passage blows the wind wheel to rotate, the wind wheel rotates to drive the blades and the magnetic sheets on the blades to rotate together, and the rotating magnetic sheets intermittently repel the magnets in the sliding groove.
When the magnet is moved inwards by the repulsive force of the magnetic sheet, when the magnet is not moved outwards by the repulsive force of the magnetic sheet, the magnet is moved outwards by the action of the spring to reset, and the wedge rod is pushed by the magnet to push the wedge block of the sieve upwards or downwards, so that the sieve moves up and down repeatedly, and agglomerated metal raw materials on the sieve mesh are dispersed, so that the screening of the metal raw materials on the sieve mesh is realized.
The larger agglomerated metal raw materials on the screen can be vibrated and dispersed, but the smaller agglomerated metal raw materials are not easy to vibrate and dispersed, the larger agglomerated metal raw materials can be vibrated and dispersed into the smaller agglomerated metal raw materials by directly utilizing the oxygen-enriched gas flow force to cause a vibration mode, and the difficulty of the oxygen-enriched gas in dispersing the agglomerated metal raw materials can be reduced by impacting the smaller agglomerated metal raw materials through the oxygen-enriched gas after the smaller agglomerated metal raw materials pass through the screen.
In order to achieve the third purpose, the invention adopts the following technical scheme: a reaction furnace having a wind-strike type powder disperser applied to a furnace mouth feed pipe as described in one of the above objects.
Drawings
FIG. 1 is a schematic view of a prior art smelting furnace.
Fig. 2 is a schematic structural view of a wind-beating type powder dispenser according to an embodiment of the present invention.
FIG. 3 is a schematic diagram illustrating the operation of the air-impact type powder dispenser according to the embodiment of the present invention.
Fig. 4 is a schematic diagram of another structure of a wind-beating type powder dispenser according to an embodiment of the invention.
Fig. 5 is a schematic structural view of a bulk material cylinder according to an embodiment of the present invention.
1. Smelting furnace, 2, process air pipe;
10. a feed pipe, 11 and a boss;
20. the air duct, 21, an air gap runner, 21.1, a spout, 22, a narrow section, 23 and an edge table;
30. the material cylinder, 31, material channel, 32, conical section, 33, round cavity, 34, chute;
40. blowing an air pipe;
50. the wind wheel, 51, magnetic sheets, 52, sliding plugs, 53, magnets, 54, springs, 55 and wedge-shaped rods;
60. screen 61, screen cloth, 62, wedge.
Detailed Description
In order to make the objects, technical solutions, and advantages of the present invention more apparent, the embodiments of the present invention will be further described in detail with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are some, but not all, embodiments of the present invention, are intended to be illustrative only and not limiting of the embodiments of the present invention, and that all other embodiments obtained by persons of ordinary skill in the art without making any inventive effort are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "center," "middle," "upper," "lower," "left," "right," "inner," "outer," "top," "bottom," "side," "vertical," "horizontal," and the like indicate orientations or positional relationships based on the orientation or positional relationships shown in the drawings, merely to facilitate description of the present invention and simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present invention. Furthermore, the terms "a," an, "" the first, "" the second, "" the third, "" the fourth, "" the fifth, "and the sixth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless explicitly specified and limited otherwise, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be either fixedly connected, detachably connected, or integrally connected, for example; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art.
For purposes of brevity and description, the principles of the embodiments are described primarily by reference to examples. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the embodiments. However, it is apparent that. It will be apparent to one of ordinary skill in the art that the embodiments may be practiced without limitation to these specific details. In some instances, well-known powder dispersing methods and structures have not been described in detail in order to avoid unnecessarily obscuring such embodiments. In addition, all embodiments may be used in combination with each other.
Example 1
The drawings of the specification are taken as the content of the specification, and the structural shapes, connection relationships, coordination relationships and positional relationships which can be obtained unambiguously in the drawings of the specification are understood as the content of the specification.
As shown in fig. 1 and 2, the air-impact powder dispersing device is installed in the feeding pipe 10 and comprises an air duct 20 and a charging barrel 30 which are concentrically arranged, and an air gap flow passage 21 is formed between the air duct 20 and the charging barrel 30.
The bottom of the air duct 20 is provided with a nozzle 21.1, the nozzle 21.1 is communicated with the air gap flow passage 21, the material passage 31 of the charging barrel 30 is communicated with the nozzle 21.1, and the nozzle 21.1 is communicated with the feeding pipe 10.
The air-impact powder dispersing device further comprises a blowing air pipe 40, wherein the blowing air pipe 40 laterally penetrates through the feeding pipe 10 and the air duct 20, and the blowing air pipe 40 is connected with the ventilation gap flow passage 21.
The nozzle of the purge air duct 40 is directed toward the outer wall of the cartridge 30.
The implementation principle is as follows:
as shown in fig. 2 and 3, a powdery metal raw material is introduced into a barrel 30 in a furnace mouth feed pipe 10, and oxygen-enriched gas is blown into an air gap runner 21 through a purge air pipe 40, so that the air duct 20 is cooled by air cooling.
Oxygen-enriched gas is filled in the air gap flow passage 21 and flows along the lower part of the air gap flow passage 21, and is concentrated to blow the nozzles 21.1 of the air duct 20 from the periphery of the charging barrel 30.
The air flow of the nozzle 21.1 flows downwards, the air flow in the charging barrel 30 is pulled to accelerate the downward flow, so that the powdery metal raw material in the charging barrel 30 is driven to accelerate the downward flow, when the powdery metal raw material flows into the nozzle 21.1 of the air barrel 20, the oxygen-enriched air blown to the nozzle 21.1 is wrapped and clamped, the oxygen-enriched air impacts the powdery metal raw material below the nozzle 21.1, the powdery metal raw material is impacted by the oxygen-enriched air from different directions around, and the powdery metal raw material is not contacted with the inner wall of the feeding pipe 10, so that the agglomerated powdery metal raw material is impacted to collide and scatter the agglomerated powdery metal raw material.
The powdered metal raw material is wrapped by downward oxygen-enriched gas, and enters a smelting furnace through a feeding pipe 10 to carry out smelting reaction.
The invention has the advantages that when the powdery metal raw material is introduced, the air duct 20 and the feed cylinder 30 are concentrically arranged, the oxygen-enriched gas blown from the air duct 20 side-blowing air duct 40 is directly blocked by the outer wall of the feed cylinder 30, so that the oxygen-enriched gas does not directly interfere with the powdery metal raw material, and the invention is beneficial to avoiding the fusion bonding caused by the fact that the powdery metal raw material is blown to the inner wall of the furnace mouth feed pipe 10 by the oxygen-enriched gas from the side direction.
And, through the air gap flow channel 21 formed between the air duct 20 and the charging barrel 30, the oxygen-enriched gas is contained, so that the oxygen-enriched gas is downwards along the air gap flow channel 21, and the flow direction of the oxygen-enriched gas is changed. The powdered metal raw material can quickly pass through the feeding pipe 10 by means of downward flowing force of oxygen-enriched gas, enter the furnace for smelting reaction, and cannot easily float to the inner wall of the feeding pipe 10, so that fusion bonding is caused.
In addition, the annular air gap flow passage 21 is located above the side of the nozzle 21.1, and when oxygen-enriched gas is blown to the nozzle 21.1 of the air duct 20, and contacts with the powdery metal raw material falling into the nozzle 21.1 from the cartridge 30, the metal raw material is subjected to a first impact of the oxygen-enriched gas from a position above the different sides, and this impact drives the metal raw material downward and toward the center below the nozzle 21.1, and when coming from the oxygen-enriched gas above the different sides, a second impact is caused to the powdery metal raw material to collide with the agglomerated powdery metal raw material. In this way, the heat and mass transfer process in smelting can be improved.
Specifically, as shown in fig. 2, the air duct 20 is sleeved on the outer wall of the material cylinder 30, the air duct 20 is in threaded connection with the material cylinder 30, and the upper end of the air duct 20 and the material cylinder 30 form a closed structure.
Specifically, as shown in fig. 2, the feeding pipe 10 is provided with a boss 11, the outer wall of the upper end of the air duct 20 is provided with an outwardly extending edge table 23, and the edge table 23 is in sealing lap joint with the boss 11.
Specifically, as shown in fig. 2, the lower end of the charging barrel 30 is in a conical section 32 structure, the lower end of the air duct 20 is in a narrow-direction section 22 structure, the conical sections 32 and the narrow-direction sections 22 have different conicities, and an air gap flow passage 21 formed between the conical sections 32 and the narrow-direction sections 22 is narrowed from wide. The flow rate of the oxygen-enriched gas blown out from the air gap flow passage 21 is increased to increase the impact force on the powdery metal raw material to collide with the agglomerated powdery metal raw material.
More specifically, as shown in fig. 4 and 5, the outer wall surface of the lower end of the barrel 30 is provided with a circular cavity 33, the side surface of the circular cavity 33 is provided with a sliding groove 34, and the sliding groove 34 is communicated with the circular cavity 33 through a hole groove.
The circular cavity 33 is rotatably connected with the wind wheel 50, the blades of the wind wheel 50 are exposed in the air gap flow channel 21, and the blades of the wind wheel 50 are provided with magnetic sheets 51.
The sliding chute 34 is connected with a sliding plug 52 in a sliding way, a magnet 53 is arranged on the opposite end surface of the sliding plug 52 to the wind wheel 50, a spring 54 is arranged between the sliding plug 52 and the sliding chute 34, and the sliding plug 52 is provided with a wedge-shaped rod 55.
The material channel 31 is provided with a sieve 60, the sieve 60 is provided with a screen 61, the sieve 60 is embedded into a ring groove formed in the side surface of the material channel 31, the bottom of the sieve 60 is provided with a wedge-shaped block 62, and the wedge-shaped end surface of the wedge-shaped block 62 is contacted with the wedge-shaped end surface of the wedge-shaped rod 55.
More specifically, when the magnetic sheet 51 and the magnet 53 face to face through the hole grooves, the magnetic sheet 51 and the magnet 53 repel each other homopolar.
When the powdery metal raw material entering the cartridge 30 falls into the sieve 60 in the lower end of the cartridge 30, the oxygen-enriched gas flowing downward through the air gap flow passage 21 blows the wind wheel 50 to rotate, the wind wheel 50 rotates to cause the blades and the magnetic pieces 51 on the blades to rotate together, and the rotating magnetic pieces 51 intermittently repel the magnets 53 in the chute 34.
When the magnet 53 is moved inwards when being repulsive to the magnetic sheet 51, when the magnet 53 is not moved outwards by the repulsive force of the magnetic sheet 51, the magnet 53 is moved outwards and reset under the action of the spring 54, the wedge rod 55 is pushed by the movement of the magnet 53 inwards and outwards to push the wedge block 62 of the sieve 60 upwards or downwards, the sieve 60 is repeatedly moved upwards and downwards, and the agglomerated metal raw materials on the screen mesh 61 of the sieve 60 are scattered, so that the screening of the metal raw materials on the screen mesh 61 is realized.
The larger agglomerated metal raw materials on the screen 61 can be vibrated and dispersed, but the smaller agglomerated metal raw materials are not easy to vibrate and dispersed into smaller agglomerated metal raw materials by directly utilizing the vibration mode caused by the oxygen-enriched gas flow force, and the difficulty of the oxygen-enriched gas in dispersing the agglomerated metal raw materials can be reduced by the oxygen-enriched gas impact after the smaller agglomerated metal raw materials pass through the screen 61.
Example 2
A powder scattering method based on the air-shot type powder scattering device of the furnace mouth feeding pipe 10 in the above embodiment 1, comprising the steps of:
the powdery metal raw material is led into a charging barrel 30 in a furnace mouth charging pipe 10, and oxygen-enriched gas is blown into an air gap runner 21 through a blowing air pipe 40 to cool the air drum 20 in an air-cooling way.
Oxygen-enriched gas is filled in the air gap flow passage 21 and flows along the lower part of the air gap flow passage 21, and is concentrated to blow the nozzles 21.1 of the air duct 20 from the periphery of the charging barrel 30.
The air flow of the nozzle 21.1 flows downwards, the air flow in the charging barrel 30 is pulled to accelerate the downward flow, so that the powdery metal raw material in the charging barrel 30 is driven to accelerate the downward flow, when the powdery metal raw material flows into the nozzle 21.1 of the air barrel 20, the oxygen-enriched air blown to the nozzle 21.1 is wrapped and clamped, the oxygen-enriched air impacts the powdery metal raw material below the nozzle 21.1, the powdery metal raw material is impacted by the oxygen-enriched air from different directions around, and the powdery metal raw material is not contacted with the inner wall of the feeding pipe 10, so that the agglomerated powdery metal raw material is impacted to collide and scatter the agglomerated powdery metal raw material.
The powdered metal raw material is wrapped by downward oxygen-enriched gas, and enters a smelting furnace through a feeding pipe 10 to carry out smelting reaction.
Specifically, in the above steps, the taper of the tapered section 32 at the lower end of the barrel 30 is different from the taper of the narrow-direction section 22 at the lower end of the air duct 20, and the air gap flow path 21 formed between the tapered section 32 and the narrow-direction section 22 is narrowed from wide, so that the flow rate of the oxygen-enriched gas blown out from the air gap flow path 21 is accelerated to increase the impact force on the powdery metal raw material to collide and scatter the agglomerated powdery metal raw material.
Specifically, in the above steps, when the powdery metal raw material introduced into the cartridge 30 falls into the sieve 60 in the lower end of the cartridge 30, the oxygen-enriched gas flowing downward through the air gap flow passage 21 blows the wind wheel 50 to rotate, and the wind wheel 50 rotates to cause the blades thereof and the magnetic pieces 51 on the blades to rotate together, and the rotating magnetic pieces 51 intermittently repel the magnets 53 in the chute 34.
When the magnet 53 is moved inwards when being repulsive to the magnetic sheet 51, when the magnet 53 is not moved outwards by the repulsive force of the magnetic sheet 51, the magnet 53 is moved outwards and reset under the action of the spring 54, the wedge rod 55 is pushed by the movement of the magnet 53 inwards and outwards to push the wedge block 62 of the sieve 60 upwards or downwards, the sieve 60 is repeatedly moved upwards and downwards, and the agglomerated metal raw materials on the screen mesh 61 of the sieve 60 are scattered, so that the screening of the metal raw materials on the screen mesh 61 is realized.
The larger agglomerated metal raw materials on the screen 61 can be vibrated and dispersed, but the smaller agglomerated metal raw materials are not easy to vibrate and dispersed into smaller agglomerated metal raw materials by directly utilizing the vibration mode caused by the oxygen-enriched gas flow force, and the difficulty of the oxygen-enriched gas in dispersing the agglomerated metal raw materials can be reduced by the oxygen-enriched gas impact after the smaller agglomerated metal raw materials pass through the screen 61.
Example 3
A reaction furnace having the wind-beating type powder disperser applied to the mouth-feed pipe in example 1 above.
While the foregoing describes the illustrative embodiments of the present invention so that those skilled in the art may understand the present invention, the present invention is not limited to the specific embodiments, and all inventive innovations utilizing the inventive concepts are herein within the scope of the present invention as defined and defined by the appended claims, as long as the various changes are within the spirit and scope of the present invention.
Claims (8)
1. The air-impact type powder dispersing device is applied to a furnace mouth feeding pipe and is characterized by being installed in the feeding pipe and comprising an air duct and a charging barrel which are concentrically arranged, wherein an air gap flow channel is formed between the air duct and the charging barrel;
a nozzle is formed at the bottom of the air duct and communicated with the air gap flow passage, the material passage of the charging barrel is communicated with the nozzle, and the nozzle is communicated with the feeding pipe;
the air-impact type powder dispersing device further comprises a blowing air pipe, wherein the blowing air pipe laterally penetrates through the feeding pipe and the air duct, and the blowing air pipe is communicated with the air gap flow passage;
the pipe orifice of the purging air pipe faces to the outer wall of the charging barrel;
the lower end of the charging barrel is of a conical section structure, the lower end of the air duct is of a narrow-direction section structure, the conical section and the narrow-direction section have different conicities, and the air gap flow channel formed between the conical section and the narrow-direction section is narrowed by a wide width;
the outer wall surface of the lower end of the charging barrel is provided with a round cavity, the side surface of the round cavity is provided with a sliding groove, and the sliding groove is communicated with the round cavity through a hole groove;
the circular cavity is rotationally connected with a wind wheel, blades of the wind wheel are exposed in the air gap flow channel, and magnetic sheets are arranged on the blades of the wind wheel;
the sliding chute is connected with a sliding plug in a sliding way, a magnet is arranged on the end face, opposite to the wind wheel, of the sliding plug, a spring is arranged between the sliding plug and the sliding chute, and the sliding plug is provided with a wedge-shaped rod;
the sieve is arranged in the material channel, a screen is arranged in the sieve, the screen is embedded into an annular groove formed in the side face of the material channel, a wedge-shaped block is arranged at the bottom of the sieve, and the wedge-shaped end face of the wedge-shaped block is contacted with the wedge-shaped end face of the wedge-shaped rod.
2. The air impact type powder dispersing device applied to a furnace mouth feeding pipe according to claim 1, wherein the air cylinder is sleeved on the outer wall of the material cylinder, the air cylinder is in threaded connection with the material cylinder, and the upper end of the air cylinder is in a closed structure with the material cylinder.
3. The air-shot powder diffuser for a furnace mouth feeding pipe according to claim 1, wherein the feeding pipe is provided with a boss, the outer wall of the upper end of the air cylinder is provided with an outwardly extending edge table, and the edge table is in sealing lap joint with the boss.
4. The wind-beating type powder spreader for a furnace mouth feeding pipe according to claim 1, wherein the magnetic sheet and the magnet are homopolar repelled when the surface of the magnetic sheet and the magnet are opposite to each other through the hole groove.
5. A powder scattering method, which is based on the air-impact type powder scattering device of the furnace mouth feeding pipe of any one of the claims 1-4, and comprises the following steps:
introducing powdery metal raw materials into a charging barrel in a furnace mouth charging pipe, blowing oxygen-enriched gas into an air gap runner through a blowing air pipe, and cooling the air barrel by air cooling;
oxygen-enriched gas is filled in the air gap flow passage, flows along the lower part of the air gap flow passage and is blown to the air duct nozzle from the periphery of the charging barrel in a concentrated manner;
the air flow of the nozzle flows downwards, the air flow in the charging barrel is pulled to accelerate the downward flow, so that the powder metal raw materials in the charging barrel are driven to accelerate downwards, when the powder metal raw materials float into the nozzle of the air barrel, the oxygen-enriched gas blown to the nozzle is wrapped and clamped, the oxygen-enriched gas impacts the powder metal raw materials below the nozzle, the powder metal raw materials are impacted by the oxygen-enriched gas from different directions around, the powder metal raw materials are not contacted with the inner wall of the charging pipe, and the agglomerated powder metal raw materials can be impacted to be scattered;
the powdery metal raw material is wrapped by downward oxygen-enriched gas and enters a smelting furnace through a feeding pipe to carry out smelting reaction.
6. The method according to claim 5, wherein in the step, the taper of the tapered section at the lower end of the barrel is different from the taper of the narrow section at the lower end of the barrel, and the air gap flow passage formed between the tapered section and the narrow section is narrowed from wide, so that the flow rate of the oxygen-enriched gas blown out from the air gap flow passage is increased to increase the impact force on the powdery metal raw material to collide and scatter the agglomerated powdery metal raw material.
7. The powder dispersing method according to claim 5, wherein in the above step, when the powdery metal raw material entering the charging barrel falls into the sieve in the lower end of the charging barrel, oxygen-enriched gas flowing downwards in the air gap flow passage blows the wind wheel to rotate, the wind wheel rotates to drive the blades and the magnetic sheets on the blades to rotate together, and the rotating magnetic sheets intermittently repel the magnets in the chute;
when the magnet is moved inwards by the repulsive force of the magnetic sheet, when the magnet is not moved outwards by the repulsive force of the magnetic sheet, the magnet is moved outwards by the action of the spring to reset, and the wedge rod is pushed by the magnet to push the wedge block of the sieve upwards or downwards, so that the sieve moves up and down repeatedly, and agglomerated metal raw materials on the sieve mesh are dispersed, so that the screening of the metal raw materials on the sieve mesh is realized.
8. A reaction furnace having a wind-strike diffuser according to any one of claims 1 to 4 applied to a furnace mouth feed tube.
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| CN202311201492.6A CN116951987B (en) | 2023-09-18 | 2023-09-18 | Air impact type powder dispersing device, method and reaction melting furnace applied to furnace mouth feeding pipe |
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| CN116951987B true CN116951987B (en) | 2024-01-05 |
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| CN104634100A (en) * | 2015-02-13 | 2015-05-20 | 阳谷祥光铜业有限公司 | Rotary-levitation melting method and nozzle and metallurgical apparatus |
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| CN114574651A (en) * | 2022-01-24 | 2022-06-03 | 山东大学 | Rotational flow iron wall melting smelting device and method |
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| CN104634100A (en) * | 2015-02-13 | 2015-05-20 | 阳谷祥光铜业有限公司 | Rotary-levitation melting method and nozzle and metallurgical apparatus |
| CN105112684A (en) * | 2015-10-05 | 2015-12-02 | 杨伟燕 | Suspension smelting nozzle |
| CN108680029A (en) * | 2016-08-04 | 2018-10-19 | 合肥通用机械研究院有限公司 | A kind of improved vibration premixed type concentrate burner |
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