CN208635556U - Oxygen-enriched negative pressure smelting furnace - Google Patents

Abstract

A kind of oxygen-enriched negative pressure smelting furnace is provided, the oxygen-enriched negative pressure smelting furnace includes: furnace bottom, is arranged in oxygen-enriched negative pressure melting furnace bottom, supports oxygen-enriched negative pressure smelting furnace；Cupola well is arranged on furnace bottom, for storing the crude metal of melting generation；Shaft, it is arranged on cupola well, for providing melting space, wherein, air port is provided at the position corresponding with tuyere area of the shaft, the air port includes the second end of the first end close to the inside of shaft and the outside close to shaft, the horizontal position of first end is lower than the horizontal position of second end, wherein, the air port has the channel of gas circulation, and the channel of the gas circulation and the angle of horizontal plane are in the range of 45 ° -60 °.Oxygen-enriched negative pressure smelting furnace according to the present utility model can reduce burnt rate and can promote going on smoothly for smelting technology.

Description

Oxygen-enriched negative pressure smelting furnace

Technical field

The utility model relates to a kind of oxygen-enriched negative pressure smelting furnaces.

Background technique

Metallurgical equipment includes the equipment for handling metallic ore, wherein medium and small smelting enterprise makees usually using blast furnace For the center part of metallurgical equipment.

For the smelting technology of blast furnace, coal or coke are usually used as heating material.Wherein on the one hand, coal and coke are logical It crosses and burns in the presence of air and generate heat, and wherein on the other hand, coal and coke also function as the reduction of metallic ore Agent.

In Metal Production field, general purpose is as few as possible using heating material, this is because these materials are relatively high It is expensive and to transport these materials be also expensive.

Utility model content

Provide a kind of oxygen-enriched negative pressure smelting furnace that can reduce burnt rate.

Accoding to exemplary embodiment, the oxygen-enriched negative pressure smelting furnace includes: furnace bottom, is used to support oxygen-enriched negative pressure smelting furnace； Cupola well is arranged on furnace bottom, for storing the crude metal of melting generation；Shaft is arranged on cupola well, for providing melting sky Between, wherein air port is provided at the position corresponding with tuyere area of the shaft, the air port includes close to the inside of shaft The second end of the outside of first end and close shaft, the horizontal position of first end are lower than the horizontal position of second end, wherein institute The channel that air port has gas circulation is stated, the channel of the gas circulation and the angle of horizontal plane are in the range of 45 ° -60 °.

Accoding to exemplary embodiment, the angle can be in the range of 50 ° -55 °.

Accoding to exemplary embodiment, the angle can be in the range of 52 ° -53 °.

Accoding to exemplary embodiment, the air port may include multiple air ports, and the multiple air port can be in sustained height On be evenly arranged on tuyere area in the circumferential direction of shaft.

Accoding to exemplary embodiment, the distance between top of the first end in the air port and cupola well can be 0.1m.

Accoding to exemplary embodiment, discharge port and slag notch has can be set in the side wall of the cupola well.

Accoding to exemplary embodiment, the discharge port may include siphon discharge port and/or horizontal discharge port.

Accoding to exemplary embodiment, the siphon discharge port may include close to the first end of inside of cupola well and separate The second end of the inside of cupola well, the horizontal position of first end are lower than the horizontal position of second end.

Accoding to exemplary embodiment, range of the angle of siphon discharge port and horizontal plane at 45 ° to 50 °.

Accoding to exemplary embodiment, the oxygen-enriched negative pressure smelting furnace can also include: furnace roof, be arranged on shaft, make richness The top of oxygen negative pressure smelting furnace is closed, wherein furnace roof is provided with feed inlet, and feed inlet is arranged to reverse turning bed structure.

Accoding to exemplary embodiment, the oxygen-enriched negative pressure smelting furnace can also include bustle pipe, and the bustle pipe can be along shaft Circumferential direction be arranged and be connected to air port gas.

Accoding to exemplary embodiment, the oxygen-enriched negative pressure smelting furnace can also include: smoke gas collecting apparatus, to production process In each stage generate flue gas be collected.

Exemplary embodiment is combined to describe oxygen-enriched negative pressure smelting furnace above.Oxygen-enriched negative pressure accoding to exemplary embodiment is molten Furnace allows to due to being configured to have the inclination angle in 40 ° -60 ° of air port and having the scheduled distance at the top of cupola well It reduces burnt rate (being reduced to 8%-10%) and going on smoothly for smelting technology can be promoted.In addition, passing through gas collection system Setting, environment-friendly type melting also may be implemented.

Detailed description of the invention

By with reference to the accompanying drawing to the description of exemplary embodiment, the above and other purpose and feature of the utility model It will become apparent, in which:

Fig. 1 is the main view for schematically showing the oxygen-enriched negative pressure smelting furnace of exemplary embodiment according to the present utility model；

Fig. 2 is the side view for schematically showing the oxygen-enriched negative pressure smelting furnace of exemplary embodiment according to the present utility model；

Fig. 3 is the partial sectional view intercepted along the line I-I ' of Fig. 2.

Specific embodiment

Hereinafter, will be described with reference to the accompanying drawings the technical concept of the utility model.

It will be apparent, however, that numerous specific details are set forth, to provide to various exemplary realities Apply the thorough understanding of example.It will, however, be evident that various exemplary embodiments can without these specific details or Person implements with one or more equivalent arrangements.For example, the case where not departing from disclosed spirit and scope Under, the concrete shape, construction and characteristic of exemplary embodiment can be used for or are implemented in another exemplary embodiment.

Fig. 1 is the main view for schematically showing oxygen-enriched negative pressure smelting furnace accoding to exemplary embodiment；Fig. 2 is schematic The side view of oxygen-enriched negative pressure smelting furnace accoding to exemplary embodiment is shown.Show hereinafter, basis will be described in conjunction with Fig. 1 and Fig. 2 The oxygen-enriched negative pressure smelting furnace 100 of example property embodiment.

Oxygen-enriched negative pressure smelting furnace 100 accoding to exemplary embodiment can have various exterior contours.In such as Fig. 1 and Fig. 2 Shown in specific example, oxygen-enriched negative pressure smelting furnace 100 has close to columned shape, however exemplary embodiment is unlimited In this.That is, oxygen-enriched negative pressure smelting furnace 100 is used to provide the space of metallurgical raw material reaction, therefore, oxygen-enriched negative pressure smelting furnace 100 inner space and exterior contour can have various shape.For example, according to a specific example, oxygen-enriched negative pressure melting The inner space of furnace 100 can have the radial dimension (for example, diameter) from top to lower part successively successively decrease it is round table-like and oxygen-enriched The exterior contour of negative pressure smelting furnace 100 can have the shape conformally or being not conformally formed with inner space.For example, according to Another specific example, the inner space of oxygen-enriched negative pressure smelting furnace 100 can have after from top to lower part, radial dimension first increases Reduced shape, and the exterior contour of oxygen-enriched negative pressure smelting furnace 100 can have with inner space conformally or not conformal landform At shape.

Oxygen-enriched negative pressure smelting furnace 100 accoding to exemplary embodiment successively includes furnace bottom 1,2 and of cupola well in the height direction Shaft 3.

Furnace bottom 1 is arranged to be used for supporting oxygen-enriched negative pressure smelting furnace 100, thus its needs be arranged to have it is scheduled strong Degree.Accoding to exemplary embodiment, furnace bottom may include the metal material with predetermined strength.Here, the example of metal material can To include cast steel, cast iron plate etc., but not limited to this.Further, since furnace bottom 1 will bear the hot environment of Metal Melting, therefore, It also needs while with scheduled intensity with heat resistance and heat insulating ability.Therefore, accoding to exemplary embodiment oxygen-enriched negative The furnace bottom 1 for pressing smelting furnace 100 can also include the thermal insulation material and refractory material of setting on the metal material.Thermal insulation material shows Example may include such as asbestos board, and the example of refractory material may include magnesia brick.

According to a specific example, furnace bottom 1 can successively include cast steel plate, the stone as metal material in a thickness direction Cotton plate and magnesia brick.However, exemplary embodiment is without being limited thereto.That is, oxygen-enriched negative pressure melting accoding to exemplary embodiment The design of material of the furnace bottom 1 of furnace 100 can be selected based on the design of material of smelting furnace in the prior art, and be not limited to above-mentioned The case where being enumerated in specific example.

In addition, those skilled in the art can be specifically chosen based on process conditions for the thickness of furnace bottom 1, this In, to avoid redundancy without doing excessive description.

Cupola well 2 can be set on furnace bottom 1 and can have scheduled space, and the space is oxygen-enriched negative for being stored in The crude metal generated during the melting (or smelting) for pressing smelting furnace 100.Cupola well 2 may include in water jacket wall and refractory walls at least It is a kind of.Here, water jacket wall may include any type of water jacket in the prior art, and cast iron water jacket, copper-casting water jacket etc. show Example property embodiment is without being limited thereto.In addition, the top plan view of cupola well 2 can have various shape.Accoding to exemplary embodiment, example Such as, the top plan view of cupola well 2 can have the shapes such as rectangular, round, and without being limited thereto.In addition, the side wall of cupola well 2 can also have There are various thickness, and can have uniform and non-uniform thickness.Therefore, those skilled in the art can be according to practical feelings Condition is arranged the construction of cupola well 2.

Further, since therefore cupola well 2 is set for storing the metal (for example, crude metal) melted out on the side wall of cupola well 2 It is equipped with the discharge port for exporting the metal that melting (smelting) goes out in cupola well 2.It accoding to exemplary embodiment, can be in cupola well 2 Discharge port is set at any suitable position of side wall, and the number of discharge port is not particularly limited.

Discharge port accoding to exemplary embodiment may include one or more horizontal discharge port 21-1 and one or At least one of siphon discharge port 21-2 of more.

The bottom of one or more side walls that can be horizontally disposed at cupola well 2 in horizontal discharge port 21-1, and It can be blocked by sealing material (not shown), to provide the confined space of cupola well 2.When needing to discharge, existing skill can be used Various methods in art separate sealing material with horizontal discharge port 21-1, to provide the crude metal outflow cupola well 2 in cupola well 2 Channel.In this case, since horizontal discharge port 21-1 can be horizontally disposed at the lower position of the furnace wall of cupola well 2 Place, therefore the metal etc. that the melting stored in cupola well 2 generates can be discharged as much as possible.In addition, when multiple horizontal dischargings are arranged When mouthful 21-1, multiple horizontal discharge port 21-1, which may be at same level height or at least within two, be may be at not Same level height.

One or more in siphon discharge port 21-2 can be set to have scheduled inclination angle with horizontal plane.Change speech It, since cupola well 2 has scheduled thickness, siphon discharge port 21-2 accoding to exemplary embodiment be can have close to furnace The first end of the inside of cylinder 2 and the second end of the inside (close to the outside of cupola well) far from cupola well 2, and in the height direction the The horizontal position of one end is lower than the horizontal position of second end, so that siphon discharge port 21-2 and horizontal plane have scheduled inclination angle. In this case, it is automatically and continuously discharged to due to can use siphon principle and making the crude metal melted out in cupola well 2 etc. The outside of oxygen-enriched negative pressure smelting furnace 100, it is possible to the setting of sealing material is omitted at siphon discharge port 21-2.In addition, working as When there is the siphon discharge port 21-2 at scheduled inclination angle using siphon principle setting, siphon discharge port 21-2 and horizontal plane it is predetermined Inclination angle can be arranged to scheduled value according to actual process condition.For example, accoding to exemplary embodiment, siphon discharge port The inclination angle of 21-2 and horizontal plane can be set between 45 ° to 50 °, in this case, inside and outside furnace Pressure the metal in cupola well 2 is flowed out automatically from siphon discharge port 21-2, to realize the continuous production of melting.

In addition, when multiple siphon discharge port 21-2 are arranged, siphon discharge port 21-2 may be at same level height or Person at least within two may be at different level heights, in addition, when multiple siphon discharge port 21-2 are arranged, Duo Gehong At least the two that can have in inclination angle identical with horizontal plane or multiple siphon discharge port 21-2 between material mouth 21-2 is sucked out Between can have the inclination angle different from horizontal plane.

In addition, the top of cupola well 2 is also provided with slag notch 22.During Metal Melting, due to material and reducing agent Complicated redox reaction is carried out between oxygen, therefore can generate a large amount of slag phase.Slag phase need to keep scheduled amount with Guarantee going on smoothly for the redox reaction in furnace.However, needing to discharge it when the quantity of slag is increased to beyond predetermined value.Cause This, can be arranged slag notch 22 on the top (for example, top of cupola well 2) of cupola well 2, and sealing element (not shown) can be used Make its sealing.When needing to discharge clinker, sealing element can be made to be separated with cinder notch 22 to discharge the clinker in furnace, so that in furnace The quantity of slag keeps being in scheduled level, so as to keep the redox reaction in furnace successfully to carry out.

Shaft 3 can be set on cupola well 2, to provide the space of Metal Melting.Shaft 3 may include water jacket 31, but not It is limited to this.That is, shaft 3 also may include other materials, for example, other materials include refractory brick.Hereinafter, by retouching in detail The example that shaft 3 includes water jacket 31 is stated, but not limited to this.

Shaft 3 may include at least one section.That is, shaft 3 can be integrally formed by a water jacket, or can also To be stacked in the height direction by multiple water jackets.In a specific example, as shown in Figures 1 and 2, shaft 3 is in height Spending on direction may include three water jackets 31, and each water jacket 31 can have same radial dimension.Here, as described above, The material of water jacket 31 can be identical or different with the material of the water jacket of cupola well, and exemplary embodiment is without being limited thereto.When shaft 3 includes When multiple water jackets 31, in order to guarantee steadily to combine between multiple water jackets 31, bracket 7 can be set in the outside of shaft 3, such as Shown in Fig. 2.Bracket 7 is for fixing and supporting water jacket 31, to guarantee that oxygen-enriched negative pressure smelting furnace 100 has stable state.

In addition, when oxygen-enriched negative pressure smelting furnace 100 includes comprising cupola well 2, the multiple portions at least one section of shaft 3 When, in order to guarantee to be unlikely to the substance in oxygen-enriched negative pressure smelting furnace 100 (for example, slag with closed structure between adjacent part Mutually and/or metal phase) escaped from out of furnace, can between adjacent part (for example, between cupola well and shaft, each section of shaft Between etc.) joint appropriate position be arranged sealing element (not shown).Here, sealing element may include anti-guncotton etc. It can prevent any material that substance is escaped from furnace.

During the work of oxygen-enriched negative pressure smelting furnace 100, complicated redox reaction is carried out in furnace, it is therefore desirable to The gas including oxygen is supplied into furnace from outside.In such a case, it is possible to tuyere area (the close cupola well 2 of shaft 3 Position) at setting penetrate shaft 3 side wall air port 32.And bustle pipe 6 can be set in the external of shaft 3.Bustle pipe 6 can be by It is arranged around oxygen-enriched negative pressure smelting furnace 100, and can be and being connected to 32 gas of air port to oxygen-enriched negative pressure smelting furnace 100 Tuyere area is blown into the gas including oxygen.Here, the gas being blown into the tuyere area of oxygen-enriched negative pressure smelting furnace 100 can be sky Gas, and air can have the temperature of room temperature, however, exemplary embodiment is without being limited thereto.In other words, to oxygen-enriched negative pressure melting The gas that the tuyere area of furnace 100 is blown into can be such as oxygen rich gas, and/or the gas being blown into can be to be heated in advance Gas.

Air port 32 accoding to exemplary embodiment is arranged to have scheduled inclination angle.Specifically, since shaft 3 has in advance Fixed thickness, therefore, the air port 32 for penetrating shaft 3 have first end in the furnace and far from the second end in furnace (with bustle pipe 6 Connection).When air port 32 is arranged to have scheduled inclination angle, need the position of the first end in air port 32 (that is, vertical height position Set) lower than air port 32 second end position, and the angle of air port 32 and horizontal plane is arranged to the range between 45 ° to 60 °. For example, the level angle in air port 32 can selected from 45.1 °, 46 °, 46.5 °, 47 °, 47.5 °, 48 °, 48.6 °, 49 °, 49.2 °, 50°、50.6°、51°、51.8°、52°、52.1°、53°、 53.5°、54°、54.8°、55°、55.9°、56°、56.5°、57°、 Unspecified angle in 57.2 °, 58 °, 58.7 °, 59 °, 59.6 ° and 60 °.Preferably, the level angle in air port 32 can be selected from Unspecified angle in the range of 50 ° to 55 °, it is highly preferred that the unspecified angle in the range of 52 ° to 53 °.

In addition, top of the first end in air port 32 accoding to exemplary embodiment apart from cupola well 2 has scheduled height.Root According to exemplary embodiment, the first end in air port 32 and the distance between the top of cupola well 2 be can be set at 0.1m.Cause This can determine the position of the second end in air port 32 when air port 32 and horizontal plane have in 40 ° to 60 ° of angular range, from And it can determine the positioning in air port 32.In addition, air port 32 can be set to it is multiple, and can be on predetermined altitude equably It is distributed in around tuyere area.

Here, when the distance between the top of the first end in air port 32 and cupola well 2 is set to larger than 0.1m, then furnace It is interior to be easy normally carry out melting.In addition, the distance between first end and the top of cupola well 2 when air port 32 are set It is set to when being less than 0.1m, then the refractory brick that is easily destroyed in furnace.Therefore, when between the first end in air port 32 and the top of cupola well 2 Distance when being arranged to 0.1m, can be realized melting go on smoothly and extend oxygen-enriched negative pressure smelting furnace 100 uses the longevity Life.

When oxygen-enriched negative pressure smelting furnace 100 accoding to exemplary embodiment is designed to its air port 32 with above-mentioned predetermined angular When, the progress of molten bath internal oxidition reduction reaction can be promoted and reduce burnt rate simultaneously to 8%-10%, thus improving production effect Production cost is significantly reduced while rate.In addition, when air port 32 is designed to the top apart from cupola well 2 with scheduled height When, going on smoothly for molten bath internal oxidition reduction reaction can be promoted.

In addition, extending gas when air port 32 to be configured to have above-mentioned predetermined angular and have scheduled height The height that the second end in air port 32 is improved while the channel of body circulation, in this case, although Metal Melting in molten bath Have in the process slag phase and/or metal to air port 32 trickle, but due to the gas in extended air port 32 circulation channel and compared with High second end, so that slag phase/metal phase of trickling air inlet 32 does not overflow oxygen-enriched negative pressure under the action of external and internal pressure The outside of smelting furnace 100.Further, since the higher reaction temperature in oxygen-enriched negative pressure smelting furnace 100, so that trickling air inlet 32 Slag phase/metal phase due to temperature higher in burner hearth without condense in air port 32 block air port 32, to be conducive to melt Refining reaction is carried out continuously.

The shaft 3 of oxygen-enriched negative pressure smelting furnace 100 accoding to exemplary embodiment can have various cross sectional shapes, for example, Polygon, ellipse, circle etc., therefore, the cross sectional shape of the shaft 3 of oxygen-enriched negative pressure smelting furnace 100 can be according to this field skill Art personnel production design process in the needs based on technique and carry out various modifications.Hereinafter, it will mainly be retouched referring to Fig. 3 The shaft 3 of oxygen-enriched negative pressure smelting furnace 100 accoding to exemplary embodiment is stated with the example in the section of circular shape.

Fig. 3 is the partial sectional view for schematically showing the line I-I ' interception along Fig. 2.As shown in Figure 3, according to exemplary reality The air port 32 for applying example is distributed generally uniformly at tuyere area, with consistent level height, and has roughly the same ruler Very little (for example, area of section).Although showing the example at tuyere area with 6 air ports 32 in Fig. 3, exemplary embodiment is not It is limited to this.That is, those skilled in the art combine the prior art, process requirement and design experiences that can rationally design richness The number and size in the circumferential air port 32 at the tuyere area of oxygen negative pressure smelting furnace 100, and one in the air port 32 of predetermined number It is a or more to can have roughly the same and/or different size.

In addition, those skilled in the art can be arranged bustle pipe 6 according to the setting in air port 32, so that in smelter Successfully gas (for example, air) can be supplied in oxygen-enriched negative pressure smelting furnace by bustle pipe 6 during skill.

Referring back to Fig. 1 and Fig. 2, oxygen-enriched negative pressure smelting furnace 100 accoding to exemplary embodiment can also include furnace roof 4. Furnace roof 4 can be set in the top of shaft 3, for being closed the top of oxygen-enriched negative pressure smelting furnace 100.The predetermined position of furnace roof 4 Place can be set feed inlet, and feed inlet can be set to one or more, and the material that outside provides is (for example, melting is former Material) it can be launched by feed inlet into oxygen-enriched negative pressure smelting furnace 100.As shown in Figure 2, furnace roof accoding to exemplary embodiment 4 can be provided with a feed inlet 41 with reverse turning bed structure in its side, and feeding system can be passed through material by skip car 5 It is launched by the feed inlet 41 with reverse turning bed structure into oxygen-enriched negative pressure smelting furnace 100, allows to shorten as far as possible due to charging Mouthfuls 41 time opened wide and be connected to the inner space of oxygen-enriched negative pressure smelting furnace 100 with outside atmosphere, so as to reducing or Avoiding the flue gas produced in oxygen-enriched negative pressure smelting furnace to spill into as far as possible, furnace is outer and guarantee furnace heat is not scattered and disappeared.However, showing Example property embodiment is without being limited thereto.

Further, since smelting technology is related to the processing steps such as transport, dispensing, reaction, the product discharge of raw material, therefore, Had during these processing steps flue dust generation, therefore, it is necessary to using gas collection system appropriate come to each of smelting technology Flue dust present in a step is collected.

Gas collection system accoding to exemplary embodiment may include furnace roof gas collection system, environment fume collection system System etc..

Furnace roof gas collection system can be set above shaft 2, for being collected to the flue dust generated in furnace.According to Exemplary embodiment can be by furnace roof fume collection when being provided with furnace roof 4 above the shaft 2 of oxygen-enriched negative pressure smelting furnace 100 System is set as being connected to furnace roof 4, and the flue gas so as to flow above opposite oxygen-enriched negative pressure smelting furnace 100 is collected.Example Such as, referring to Figures 1 and 2, furnace roof gas collection system accoding to exemplary embodiment can be set to connect with the side wall of furnace roof 4 Logical furnace roof smoke exhaust pipe 8 flows to the gas of furnace roof 4 for collecting and discharging.

Environment gas collection system, which can be set, to be easy to produce at the position of environment flue gas.Specifically, according to exemplary reality The environment gas collection system for applying example can be set near the feed inlet of oxygen-enriched negative pressure smelting furnace 100 as feed zone environment cigarette Gas collection system 91.Since negative pressure smelting furnace 100 oxygen-enriched in fill process needs to be connected to external to provide feeding-passage, because Partial fume in the furnace of this oxygen-enriched negative pressure smelting furnace 100 may be overflowed from feed inlet.In this case, feed zone environment cigarette Gas collection system 91 can be set to be collected in fill process from the flue dust that feed inlet overflows.In addition, when according to example Property embodiment oxygen-enriched negative pressure smelting furnace 100 have multiple feed inlets when, multiple feed zone environment fume collection systems can be set System 91.

In addition, environment gas collection system can be further disposed at slag notch and discharge outlet, for slagging tap and go out The flue gas generated during material is collected.Specifically, as shown in Figure 2, it can be provided at discharge port 21-1 and 21-2 Material mouth gas collection system 92, and slag notch gas collection system 93 can be set at slag notch 22, so as to out The flue gas generated in material and tapping process is collected.In addition, when discharge port 21-1 and 21-2 and slag notch 22 are arranged to more When a, one or more corresponding environment gas collection systems can be respectively set to be collected to environment flue gas.

In addition, it is highly preferred that environment gas collection system can further be arranged in entire tapping process and discharge At any portion in journey and the storage area of slag charge and smelting metal, it is collected for the flue dust to entire smelting technology, The comprehensive utilization ratio of the energy is improved while reducing or even avoiding the pollution to environment.

The oxygen-enriched negative pressure smelting furnace of exemplary embodiment according to the present utility model is described in detail in conjunction with attached drawing above. Oxygen-enriched negative pressure smelting furnace accoding to exemplary embodiment can replace blast furnace for such as lead smelting smelting furnace, and due to The inclination angle in its air port for being configured to have 40 ° -60 ° and there is the scheduled distance at the top of the cupola well, allows to reduce coke Rate (being reduced to 8%-10%) and going on smoothly for smelting technology can be promoted.In addition, by the setting of gas collection system, Also environment-friendly type melting may be implemented.

Claims (10)

1. a kind of oxygen-enriched negative pressure smelting furnace, which is characterized in that the oxygen-enriched negative pressure smelting furnace includes:

Furnace bottom is used to support oxygen-enriched negative pressure smelting furnace；

Cupola well is arranged on furnace bottom, for storing the crude metal of melting generation；

Shaft is arranged on cupola well, for providing melting space,

Wherein, air port is provided at the position corresponding with tuyere area of the shaft, the air port includes close to the inside of shaft First end and second end close to the outside of shaft, the horizontal position of first end be lower than the horizontal position of second end,

Wherein, the air port has the channel of gas circulation, and the channel of the gas circulation and the angle of horizontal plane are at 45 ° -60 ° In the range of.

2. oxygen-enriched negative pressure smelting furnace as described in claim 1, which is characterized in that the angle is in the range of 50 ° -55 °.

3. oxygen-enriched negative pressure smelting furnace as described in claim 1, which is characterized in that the angle is in the range of 52 ° -53 °.

4. oxygen-enriched negative pressure smelting furnace as described in claim 1, which is characterized in that the air port includes multiple air ports, described more A air port is evenly arranged on tuyere area in the circumferential direction of shaft on sustained height.

5. oxygen-enriched negative pressure smelting furnace as described in claim 1, which is characterized in that the first end in the air port and the top of cupola well Between distance be 0.1m.

6. oxygen-enriched negative pressure smelting furnace as described in claim 1, which is characterized in that the side wall of the cupola well be provided with discharge port and Slag notch.

7. oxygen-enriched negative pressure smelting furnace as claimed in claim 6, which is characterized in that the discharge port include siphon discharge port and/ Or horizontal discharge port.

8. oxygen-enriched negative pressure smelting furnace as claimed in claim 7, which is characterized in that the siphon discharge port includes close to cupola well The second end of internal first end and the inside far from cupola well, the horizontal position of first end are lower than the horizontal position of second end.

9. oxygen-enriched negative pressure smelting furnace as claimed in claim 8, which is characterized in that the angle of siphon discharge port and horizontal plane exists 45 ° to 50 ° of range.

10. oxygen-enriched negative pressure smelting furnace as described in claim 1, which is characterized in that the oxygen-enriched negative pressure smelting furnace further include:

Furnace roof is arranged on shaft, is closed the top of oxygen-enriched negative pressure smelting furnace,

Wherein, furnace roof is provided with feed inlet, and feed inlet is arranged to reverse turning bed structure.