CN216144148U - Rotary side-blown smelting device - Google Patents
Rotary side-blown smelting device Download PDFInfo
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- CN216144148U CN216144148U CN202121811685.XU CN202121811685U CN216144148U CN 216144148 U CN216144148 U CN 216144148U CN 202121811685 U CN202121811685 U CN 202121811685U CN 216144148 U CN216144148 U CN 216144148U
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Abstract
The utility model discloses a rotary side-blown smelting device, which belongs to the technical field of metallurgy and comprises a furnace body, wherein a furnace chamber is arranged in the furnace body, the furnace chamber comprises a metal chamber layer, a slag chamber layer and a gas phase chamber layer which are sequentially arranged from bottom to top, in the smelting process of the furnace body, the metal chamber layer is suitable for corresponding to smelting metal, the slag chamber layer is suitable for corresponding to slag, the gas phase chamber layer is suitable for corresponding to gas, and a smoke port, a slag discharge port and a metal outlet are arranged on the furnace body; the first spray gun is arranged on the furnace body and is used for spraying combustion-supporting gas and fuel into the slag cavity layer and/or the gas phase cavity layer. The rotary side-blown smelting device can avoid the oxidation reaction of metal caused by the contact of oxygen in combustion-supporting gas and the metal cavity layer, ensures the reductive smelting environment of the metal cavity layer, and simultaneously, the surface tension of the metal layer in the metal cavity layer is greater than that of the slag layer in the slag cavity layer, so that the first spray gun is not easy to block.
Description
Technical Field
The utility model relates to the technical field of metallurgy, in particular to a rotary side-blown smelting device.
Background
In recent years, because the oxygen-enriched side-blown smelting process has the advantages of small investment, strong material adaptability, high smelting efficiency and the like, the oxygen-enriched side-blown smelting process is greatly developed in the field of molten pool smelting. More and more enterprises begin to adopt oxygen-enriched side-blown smelting process to smelt various metals.
At present, a side-blown smelting device corresponding to the oxygen-enriched side-blown smelting process mainly comprises a furnace body, wherein a furnace chamber used for smelting materials is arranged in the furnace body, a spray gun capable of being communicated with the furnace chamber is inserted in the side part of the furnace body, the spray gun is used for spraying combustion-supporting gas and fuel into the furnace chamber, a metal outlet for discharging smelted metal and a slag outlet for discharging smelted slag are arranged at the end part of the furnace body, and a flue gas outlet for discharging flue gas released during smelting is arranged at the top of the furnace body. The smelting device mainly comprises the following smelting processes: the material is sent into the metal layer in the furnace chamber, combustion-supporting gas and fuel are supplied to the metal layer by a spray gun so as to heat and smelt the material, the metal with high density can be remained in the metal layer during smelting, the slag with low density can float above the metal layer, the flue gas released in the smelting process can be discharged from a flue gas outlet, the smelted metal can be discharged through a metal outlet, and the smelted slag can be discharged from a slag outlet.
The smelting device can directly smelt without granulating, thereby simplifying the smelting operation and reducing the production cost, but in the process of supplying combustion-supporting gas and fuel to the metal layer by the spray gun, under the condition of insufficient gas pressure in the spray gun, the spray gun often has the problem of blockage on the metal layer, oxygen in the combustion-supporting gas can oxidize the metal in the metal layer, and the oxidized metal is returned to increase the process cost.
SUMMERY OF THE UTILITY MODEL
The present invention is directed to solving, at least to some extent, one of the technical problems in the related art.
Therefore, the embodiment of the utility model provides a rotary side-blown smelting device. During smelting, the rotary side-blown smelting device can avoid the stirring of combustion-supporting gas on the metal layer, ensures the reductive smelting environment of the metal layer, and simultaneously, because the first spray gun for side blowing is not directly communicated with the metal cavity layer, and the surface tension of the metal layer in the metal cavity layer is greater than that of the slag layer in the slag cavity layer, the first spray gun is less prone to blockage than the spray gun directly communicated with the metal cavity layer.
The rotary side-blown smelting device comprises a furnace body, wherein a furnace chamber is arranged in the furnace body, the furnace chamber comprises a metal chamber layer, a slag chamber layer and a gas phase chamber layer which are sequentially arranged from bottom to top, in the smelting process of the furnace body, the metal chamber layer is suitable for corresponding to smelting metal, the slag chamber layer is suitable for corresponding to slag, and the gas phase chamber layer is suitable for corresponding to gas; the first spray gun is arranged on the furnace body and is used for spraying combustion-supporting gas and fuel into the slag cavity layer and/or the gas phase cavity layer.
In some embodiments, the rotary side-blown smelting device further comprises a second lance, the second lance is arranged on the furnace body, and the second lance is suitable for injecting natural gas and/or coal powder into the metal cavity layer.
In some embodiments, the furnace body is a horizontal furnace body, the furnace body can rotate around the central axis of the furnace body, and the furnace body is provided with a hole for observing the smelting state in the furnace body.
In some embodiments, the first lance is a plurality of lances including a combustion lance for injecting combustion gas and a fuel lance for injecting fuel.
In some embodiments, the plurality of first lances includes a first lance group and a second lance group, the first lance group and the second lance group each include a plurality of first lances spaced apart along an axial direction of the furnace body, and the first lance group and the second lance group are arranged in opposition, with nozzles of combustion lances in the first lance group and nozzles of fuel lances in the second lance group being arranged in opposition.
In some embodiments, the first lance includes a first pipe and a second pipe, the first pipe and the second pipe are arranged on the furnace wall of the furnace body in a penetrating manner, the first pipe is sleeved on the outer periphery side of the second pipe, an annular channel is formed between the first pipe and the second pipe, one of the channel in the first pipe and the annular channel is used for introducing fuel, and the other one of the channel in the first pipe and the annular channel is used for introducing combustion-supporting gas.
In some embodiments, the rotary side-blown smelting device further comprises a cooling water jacket, the cooling water jacket is arranged on the furnace wall of the furnace body in a penetrating mode, the first spray gun is arranged in the cooling water jacket, and the cooling water jacket is used for cooling the first spray gun.
In some embodiments, the first lance further comprises a third pipe, the third pipe is communicated with the first pipe and is located outside the furnace body, and the third pipe is used for introducing fuel or combustion-supporting gas into the annular channel.
In some embodiments, the third pipe comprises a fourth pipe and a fifth pipe, the first end of the fourth pipe is communicated with the first pipe, the first end of the fifth pipe is used for being communicated with fuel or combustion-supporting gas, the second end of the fourth pipe is communicated with the second end of the fifth pipe, the outer circumferential surface of the fourth pipe is smoothly and transitionally connected with the outer circumferential surface of the fifth pipe, the axis of the fourth pipe forms an obtuse angle with the axis of the fifth pipe, and the axis of the fifth pipe forms an acute angle with the axis of the second pipe in the air inlet direction.
In some embodiments, the flue gas port is arranged on the top wall of the furnace body and is used for communicating with the gas phase cavity layer, the periphery of the flue gas port is provided with a smoke exhaust tube extending along the vertical direction, the slag discharge port is used for communicating with the slag cavity layer, the bottom surface of the slag discharge port is higher than the boundary position of the slag cavity layer and the metal cavity layer, the metal outlet is used for communicating with the metal cavity layer, and the bottom surface of the metal outlet is not higher than the lowest point of the furnace cavity.
In some embodiments, the first lance and the second lance are each a subsonic lance or a supersonic lance.
Has the advantages that: in the smelting process, because the first spray gun is used for injecting combustion-supporting gas and fuel into the slag cavity layer and/or the gas phase cavity layer, the metal in the metal cavity layer is not directly stirred by the combustion-supporting gas sprayed out of the first spray gun, and further oxygen in the combustion-supporting gas is not contacted with the metal to cause oxidation reaction of the metal, so that the reductive smelting environment of the metal layer is ensured.
Drawings
FIG. 1 is a schematic structural diagram of a rotary side-blown smelting device according to an embodiment of the present invention;
FIG. 2 is a transverse cross-sectional view of FIG. 1;
fig. 3 is an enlarged schematic view at a in fig. 2.
Reference numerals:
a rotary side-blown smelting device 100;
a furnace body 1; a flue gas port 2; a metal outlet 3; a spray hole 4; a slag discharge port 5; a first spray gun 6; a first tube 61; a second tube 62; a third pipe 63; a fourth tube 64; a fifth pipe 65; a metal cavity layer 7; a slag cavity layer 8; a gas phase cavity layer 9; the water jacket 10 is cooled.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings. The embodiments described below with reference to the drawings are illustrative and intended to be illustrative of the utility model and are not to be construed as limiting the utility model.
As shown in fig. 1 to 3, a rotary side-blown smelting device 100 according to an embodiment of the present invention includes a furnace body 1 and a first lance 6, wherein a furnace chamber is arranged in the furnace body 1, the furnace chamber includes a metal chamber layer 7, a slag chamber layer 8 and a gas phase chamber layer 9 which are sequentially arranged from bottom to top, during a smelting process of the furnace body 1, the metal chamber layer 7 is adapted to correspond to a smelting metal, the slag chamber layer 8 is adapted to correspond to a slag, the gas phase chamber layer 9 is adapted to correspond to a gas, the first lance 6 is arranged on the furnace body 1, and the first lance 6 is adapted to inject combustion-supporting gas and fuel into the slag chamber layer 8, the burning fuel can directly heat the slag in the slag chamber layer 8, so that the metal in the metal chamber layer 7 is not directly stirred by the combustion-supporting gas injected from the first lance 6, and further oxygen in the combustion-supporting gas does not contact with the metal to cause an oxidation reaction of the metal, thereby ensuring a reducing smelting environment of the metal chamber layer 7, meanwhile, the first spray gun 6 is not directly communicated with the metal cavity layer 7, and the surface tension of the metal layer in the metal cavity layer 7 is greater than that of the slag layer in the slag cavity layer 8, so that the first spray gun 6 is less prone to blockage than a spray gun directly communicated with the metal cavity layer 7.
In some embodiments, the first lance 6 is disposed at a vertical distance of 300 mm to 1300 mm from the lowest point of the bottom of the furnace body 1. For example, the distance between the installation position of the first lance 6 and the lowest point of the bottom of the furnace body 1 in the vertical direction is 800 mm, and at this time, the interface between the slag cavity layer 8 and the metal cavity layer 7 should be located below the first lance 6, that is, the distance between the interface between the slag cavity layer 8 and the metal cavity layer 7 and the lowest point of the bottom of the furnace body 1 in the vertical direction should be less than 800 mm.
It will be appreciated that in other embodiments the first lance 6 may also be in communication with the gas phase chamber 9 and that combustion gas and fuel from the first lance 6 may heat the gas in the gas phase chamber 9 and the slag layer 8 in the slag chamber in the form of radiant heat transfer so that neither the metal in the metal chamber 7 nor the slag in the slag chamber 8 is affected by the oxygen in the gas and the first lance 6 is blocked.
In some embodiments, the rotary side-blown smelting device 100 further includes a second lance disposed on the furnace body, and the second lance is adapted to inject natural gas and/or pulverized coal into the metal cavity layer 7, so that when the metal cavity layer 7 contains oxidized metal, the oxidized metal can be reduced by injecting a reducing agent such as natural gas or pulverized coal into the metal cavity layer 7.
It should be noted that, in the present invention, the structure and connection of the first spray gun 6 and the second spray gun are not limited, for example, the first spray gun 6 and the second spray gun may include a nozzle extending along the axial direction, the nozzle may be disposed on the furnace body 1, the first spray gun 6 and the second spray gun may also include a pipe, and the outlet end of the pipe is communicated with the furnace chamber.
In some embodiments, the furnace body 1 is a horizontal furnace body, the furnace body 1 is rotatable around the central axis of the furnace body 1, the furnace body 1 is provided with a hole for observing the internal smelting state of the furnace body 1, thus when the existing metal is bonded on the inner wall of the furnace body 1 through human eyes or high-temperature camera head, the furnace body 1 is rotated, the injection amount of combustion-supporting gas and fuel is increased to improve the smelting temperature, the furnace body 1 can be separated from the inner wall of the furnace body 1 by the metal bonded on the inner wall of the furnace body 1 under the action of gravity in the reciprocating rotation process, the heating area of the metal block separated from the furnace body 1 is increased, the heat transfer efficiency is improved, and the metal bonding phenomenon can be accelerated to eliminate, thereby avoiding the occurrence of the dead furnace phenomenon.
It should be noted that, in the present invention, the rotation connection manner of the furnace body 1 is not limited, for example, the rotary side-blown smelting device 100 may further include a bracket, a trunnion ring, a gear ring and a driving device, the trunnion ring is sleeved on the furnace body and rotatably supported on the bracket, the gear ring is sleeved on the furnace body 1, and the driving device is connected to the gear ring and is adapted to drive the furnace body 1 to rotate by driving the gear ring to rotate.
In some embodiments, there are a plurality of first spray guns 6, and the plurality of first spray guns 6 include a combustion-supporting spray gun for spraying combustion-supporting gas and a fuel spray gun for spraying fuel, so that combustion-supporting gas and fuel will be combusted when they meet, thereby effectively avoiding burning of the inner wall of the furnace body 1 and the first spray gun 6, and further prolonging the service life of the present invention.
It should be noted that, in the present invention, the specific number of the combustion-supporting lances and the fuel lances is not limited, and the number of the combustion-supporting lances and the number of the fuel lances may be set according to the size of the furnace body 1.
In some embodiments, the plurality of first lances 6 includes a first lance group and a second lance group, each of the first lance group and the second lance group includes a plurality of first lances 6 arranged at intervals in the axial direction of the furnace body 1, and the first lance group and the second lance group are arranged oppositely, and the nozzles of the combustion supporting lances in the first lance group and the nozzles of the fuel lances in the second lance group are arranged oppositely, so that the position of fuel combustion can be in the middle of the furnace chamber.
It will be appreciated that in other embodiments the axis of the nozzle of the burner and the axis of the nozzle of the fuel lance may be at any angle, for example at a right angle, so that the burner and the fuel lance may be disposed on adjacent inner walls of the furnace body 1.
It is understood that, in other embodiments, the first lance 6 may also include a first pipe 61 and a second pipe 62, the first pipe 61 and the second pipe 62 are disposed on the furnace wall of the furnace body 1, the first pipe 61 is sleeved on the outer peripheral side of the second pipe 62, an annular channel is formed between the first pipe 61 and the second pipe 62, one of the channel and the annular channel in the first pipe 61 is used for introducing fuel, and the other one is used for introducing combustion-supporting gas, so that the fuel and the combustion-supporting gas can be mixed and combusted when being ejected by a single first lance 6.
In some embodiments, the first lance 6 further comprises a third pipe 63, the third pipe 63 is communicated with the first pipe 61, the third pipe 63 is positioned outside the furnace body 1, and the third pipe 63 is used for introducing fuel or combustion-supporting gas into the annular channel, so that the second pipe 62 and the third pipe 63 can be separately connected with different pipelines.
In some embodiments, the third pipe 63 includes a fourth pipe 64 and a fifth pipe 65, a first end of the fourth pipe 64 is communicated with the first pipe 61, a first end of the fifth pipe 65 is used for communicating with the fuel or the combustion supporting gas, a second end of the fourth pipe 64 is communicated with a second end of the fifth pipe 65, an outer peripheral surface of the fourth pipe 64 is smoothly transitionally connected with an outer peripheral surface of the fifth pipe 65, an axis of the fourth pipe 64 forms an obtuse angle with an axis of the fifth pipe 65, and an axis of the fifth pipe 65 forms an acute angle with an axis of the second pipe 62 in the air intake direction, so that when the first end of the fifth pipe 65 is used for connecting with a pipeline of the fuel or the combustion supporting gas, a relatively large installation space can be provided.
In order to prevent the first lance 6 from being damaged due to overheating, in some embodiments, the rotary side-blown smelting device 100 further includes a cooling water jacket 10, the cooling water jacket 10 is arranged on the furnace wall of the furnace body 1, the first lance 6 is arranged in the cooling water jacket 10, and the cooling water jacket 10 is used for cooling the first lance 6.
In some embodiments, the first lance 6 and the second lance are both subsonic lances or supersonic lances, so that when the width or diameter of the furnace body 1 is too large, combustion gas and fuel injected through the subsonic lances or the supersonic lances can heat the slag cavity layer 8 and simultaneously impact the slag cavity layer 8, the flow capacity of the slag cavity layer 8 can be improved, and the temperature unevenness of the slag cavity layer 8 can be reduced.
In some embodiments, the top wall of the furnace body 1 is provided with a flue gas hole communicated with the gas phase cavity layer 9, and the periphery of the flue gas hole is provided with a smoke exhaust pipe extending along the up-down direction.
In some embodiments, the furnace body 1 is provided with a slag discharge port, the slag discharge port 5 is used for being communicated with the slag cavity layer 8, and the bottom surface of the slag discharge port 5 is higher than the boundary position of the slag cavity layer 8 and the metal cavity layer 7, so that when the slag needs to be discharged, metal can be prevented from being discharged along with the slag, and part of the slag can be retained in the furnace cavity to ensure that materials newly entering the furnace cavity can be always in the slag before the reaction is finished.
In some embodiments, the furnace body 1 is provided with a metal outlet 3, the metal outlet 3 is used for communicating with the metal cavity layer 7, and the bottom surface of the metal outlet 3 is not higher than the lowest point of the furnace cavity, so that when the metal is discharged, the metal can be discharged cleanly.
In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the utility model.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless explicitly specifically defined otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the terms used above are not necessarily intended to refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, various embodiments or examples and features of different embodiments or examples described in this specification can be combined and combined by one skilled in the art without contradiction.
Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that variations, modifications, substitutions and alterations can be made to the above embodiments by those of ordinary skill in the art within the scope of the present invention.
Claims (10)
1. A rotary side-blown smelting device is characterized by comprising:
the smelting furnace comprises a furnace body, wherein a furnace chamber is arranged in the furnace body, the furnace chamber comprises a metal chamber layer, a slag chamber layer and a gas phase chamber layer which are sequentially arranged from bottom to top, in the smelting process of the furnace body, the metal chamber layer is suitable for corresponding to smelting metal, the slag chamber layer is suitable for corresponding to slag, and the gas phase chamber layer is suitable for corresponding to gas;
the first spray gun is arranged on the furnace body and is used for spraying combustion-supporting gas and fuel into the slag cavity layer and/or the gas phase cavity layer.
2. The rotary side-blown smelting unit according to claim 1, further comprising: the furnace body is provided with a metal cavity layer, and the furnace body is provided with a first spray gun and a second spray gun, wherein the first spray gun is arranged on the furnace body and is suitable for spraying natural gas and/or coal powder into the metal cavity layer.
3. The rotary side-blown smelting unit of claim 2, further comprising: the furnace body is a horizontal furnace body, the furnace body can rotate around the central axis of the furnace body, and a hole for observing the internal smelting state of the furnace body is formed in the furnace body.
4. The rotary side-blown smelting unit according to claim 3, wherein: the first spray gun is multiple, and a plurality of first spray guns include combustion-supporting spray gun and fuel spray gun, combustion-supporting spray gun is used for spouting combustion-supporting gas, the fuel spray gun is used for spouting fuel.
5. The rotary side-blown smelting unit according to claim 4, wherein: the first spray guns comprise a first spray gun group and a second spray gun group, the first spray gun group and the second spray gun group respectively comprise a plurality of first spray guns which are arranged along the axial direction of the furnace body at intervals, the first spray gun group and the second spray gun group are arranged oppositely, and nozzles of combustion-supporting spray guns in the first spray gun group are arranged opposite to nozzles of fuel spray guns in the second spray gun group.
6. The rotary side-blown smelting unit according to claim 1, further comprising: the first spray gun comprises a first pipe and a second pipe, the first pipe and the second pipe are arranged on the furnace wall of the furnace body in a penetrating mode, the first pipe is sleeved on the outer peripheral side of the second pipe in a sleeving mode, an annular channel is formed between the first pipe and the second pipe, one of the channel in the first pipe and the annular channel is used for introducing fuel, and the other one of the channel in the first pipe and the annular channel is used for introducing combustion-supporting gas.
7. The rotary side-blown smelting unit according to claim 6, further comprising: the furnace body is characterized by further comprising a cooling water jacket, the cooling water jacket is arranged on the furnace wall of the furnace body in a penetrating mode, the first spray gun is arranged in the cooling water jacket in a penetrating mode, and the cooling water jacket is used for cooling the first spray gun.
8. The rotary side-blown smelting unit according to claim 6, further comprising: the first spray gun further comprises a third pipe, the third pipe is communicated with the first pipe and located on the outer side of the furnace body, and the third pipe is used for introducing fuel or combustion-supporting gas into the annular channel.
9. The rotary side-blown smelting unit according to any one of claims 1 to 8, wherein: the furnace body roof is equipped with the flue gas port of intercommunication gaseous phase chamber layer, the flue gas port periphery is equipped with the chimney that extends along upper and lower direction, the furnace body is equipped with the cinder notch, the cinder notch is used for communicating with slag chamber layer, the bottom surface of cinder notch be higher than slag chamber layer with the boundary position on metal chamber layer, the furnace body is equipped with the metal export, the metal export be used for with metal chamber layer intercommunication, the bottom surface of metal export is not higher than the minimum on furnace chamber.
10. The rotary side-blown smelting unit according to any one of claims 2 to 5, wherein: the first spray gun and the second spray gun are both subsonic spray guns or supersonic spray guns.
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| CN202121811685.XU CN216144148U (en) | 2021-08-04 | 2021-08-04 | Rotary side-blown smelting device |
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| CN202121811685.XU CN216144148U (en) | 2021-08-04 | 2021-08-04 | Rotary side-blown smelting device |
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| CN216144148U true CN216144148U (en) | 2022-03-29 |
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