Side-blowing smelting device and smelting method

Abstract

The present application discloses a side-blown smelting device and smelting method. The side-blown furnace device comprises: a furnace body, wherein a smelting zone, a reduction zone, and a settling zone are sequentially arranged in the longitudinal direction of the furnace body; the furnace body comprises: a first sidewall and a second sidewall facing each other in the width direction; a first lance and a second lance, wherein the first lance is disposed in the region of the first sidewall and / or the second sidewall facing the smelting zone and extends into the slag in the smelting zone; and the second lance is disposed in the region of the first sidewall and / or the second sidewall facing the reduction zone and extends into the slag in the reduction zone. In the side-blown smelting device according to the present application, fuel and oxygen are mixed with the high-temperature melt under the action of the first lance and react violently to produce high-grade, low-sulfur nickel matte and smelting slag. Further partial reduction is achieved under the action of the second lance in the reduction zone, thereby achieving continuous production of low-sulfur nickel and sulfur and depleted smelting slag.

Description

Technical Field

[0001] The present application relates to the field of smelting technology, and in particular to a side-blowing smelting device and a smelting method. Background Art

[0002] The currently established process for smelting secondary nickel concentrate is: secondary nickel concentrate → reverberatory furnace smelting → nickel anode plates → electrolysis → electrolytic nickel. This process utilizes a reverberatory furnace. Traditionally, this process only melts and casts the material into high-sulfur nickel anode plates, without participating in the chemical reactions of iron removal and desulfurization. The high sulfur content of nickel anode plates leads to issues such as fragility and a high residual nickel electrode rate. Furthermore, the low smelting efficiency and high energy consumption of reverberatory furnaces have become major obstacles to improving nickel smelting technology. Summary of the Invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one objective of the present application is to provide a side-blown smelting device in which fuel and oxygen are mixed with a high-temperature melt under the action of a first lance and react violently to produce high-grade, low-sulfur nickel matte and smelting slag. This is then further partially reduced under the action of a second lance in a reduction zone, thereby achieving continuous production of low-sulfur nickel and depleted smelting slag.

[0004] The present application also proposes a smelting method for a side-blown furnace smelting device.

[0005] The side-blowing smelting device according to the present application includes: a furnace body, in which a smelting zone, a reduction zone and a sedimentation zone are sequentially arranged in the length direction, and the furnace body includes: a first side wall and a second side wall facing each other in the width direction; a first lance and a second lance, the first lance is arranged on the area where the first side wall and / or the second side wall are facing the smelting zone and extends into the slag in the smelting zone, and the second lance is arranged on the area where the first side wall and / or the second side wall are facing the reduction zone and extends into the slag in the reduction zone.

[0006] In the side-blown smelting device of this application, materials are added through a feed port at the top of the smelting zone. Under the action of the first lance, fuel and oxygen mix with the high-temperature melt and react violently to produce high-grade, low-sulfur nickel matte and smelting slag. The low-sulfur nickel matte and smelting slag generated in the smelting zone pass through the reduction zone and settling zone, respectively, and are further partially reduced by the second lance in the reduction zone, thereby achieving continuous production of low-sulfur nickel and depleted smelting slag.

[0007] According to one embodiment of the present application, the furnace body further includes: a third side wall and a fourth side wall facing each other in the length direction; the side-blowing smelting device further includes: a first retaining wall and a second retaining wall, the first retaining wall and the second retaining wall are arranged in the furnace body, and the first retaining wall and the second retaining wall are spaced apart in the length direction of the furnace body; wherein the smelting zone is defined between the first retaining wall and the third side wall, the reduction zone is defined between the first retaining wall and the second retaining wall, and the sedimentation zone is defined between the second retaining wall and the fourth side wall.

[0008] According to one embodiment of the present application, the bottom of the first retaining wall is spaced apart from the bottom wall of the furnace body so that the melt zone of the smelting zone and the melt zone of the reduction zone are connected, and the bottom of the second retaining wall is spaced apart from the bottom wall of the furnace body so that the melt zone of the reduction zone and the melt zone of the sedimentation zone are connected.

[0009] According to one embodiment of the present application, the furnace body further includes: a top wall, which is respectively connected to the top end of the third side wall and the top end of the second retaining wall, and the first retaining wall is separated from the top wall to enable the gas phase zone of the smelting zone and the gas phase zone of the reduction zone to communicate.

[0010] According to one embodiment of the present application, a smoke exhaust pipe is further provided on the top wall, and the exhaust channels in the smoke exhaust pipe are connected to the gas phase zone of the smelting zone and the gas phase zone of the reduction zone.

[0011] According to one embodiment of the present application, a feeding port is provided on the top wall in an area opposite to the smelting zone, and a downward extending baffle is also provided on the inner side wall of the top wall, and the projection of the baffle on the bottom wall is located between the projection of the feeding port on the bottom wall and the projection of the exhaust channel on the bottom wall.

[0012] According to one embodiment of the present application, a second tuyere is provided in an area of ​​the first side wall or the second side wall facing the smelting zone, and a third tuyere is provided in an area of ​​the top wall facing the reduction zone.

[0013] According to one embodiment of the present application, the first retaining wall and the second retaining wall include: a first water jacket and a first refractory brick layer arranged outside the water jacket and in contact with the melt.

[0014] According to one embodiment of the present application, the first to fourth side walls include: a melt storage area, a bubbling reaction area and an airflow area, the melt storage area and the airflow area include: a second refractory brick layer, the bubbling reaction area includes: a third refractory brick layer and a second water jacket arranged on the outside of the third refractory brick layer.

[0015] According to one embodiment of the present application, an upper drain port and a lower drain port spaced apart in the upper and lower directions are provided in an area of ​​the first side wall or the second side wall facing the sedimentation area.

[0016] A smelting method for a side-blown smelting device, wherein the side-blown smelting device is the above-mentioned side-blown smelting device, and the smelting method comprises at least the following steps: adding ore to a smelting zone; inserting a first lance into the slag in the smelting zone, adjusting the ratio of natural gas and oxygen in the first lance to achieve an oxidizing atmosphere, ensuring heat replenishment while removing sulfur from the ore; the slag and nickel matte enter a reduction zone, inserting a second lance into the slag in the reduction zone, adjusting the ratio of natural gas and oxygen in the second lance to achieve a reducing atmosphere, and reducing overoxidized nickel matte in the slag; the slag and nickel matte flow into a settling zone, and achieving settling and separation of the nickel matte in the settling zone.

[0017] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0019] Figure 1 is a cross-sectional view of a side-blowing smelting device in one direction according to an embodiment of the present application;

[0020] Figure 2 It is a cross-sectional view from another direction of the side-blowing smelting device according to an embodiment of the present application.

[0021] Reference numerals:

[0022] Side-blown smelting device 100,

[0023] Furnace body 110, third side wall 111, fourth side wall 113, top wall 115, smoke exhaust pipe 117, baffle 119,

[0024] First spray gun 130, second spray gun 150, first retaining wall 170, second retaining wall 190,

[0025] Smelting zone 101, second tuyere 102, reduction zone 103, third tuyere 104, sedimentation zone 105, melt storage zone 106a, bubbling reaction zone 106b, air flow zone 106c, feeding port 107, upper emptying port 108a, lower emptying port 108b. DETAILED DESCRIPTION

[0026] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0027] Reference below Figure 1-Figure 2 A side-blowing smelting device 100 according to an embodiment of the present application is described.

[0028] The side-blowing smelting device 100 according to an embodiment of the present application may include a furnace body 110 , a first lance 130 , and a second lance 150 .

[0029] A holding space is provided in the furnace body 110, and the melting process, oxidation-reduction process and sedimentation process of the nickel ore are all carried out in the furnace body 110. Specifically, a smelting zone 101, a reduction zone 103 and a sedimentation zone 105 are sequentially provided in the length direction of the furnace body 110. The material can fall into the smelting zone 101 through the feeding port 107 and be smelted in the smelting zone 101 under the action of high-temperature fuel. The smelting slag generated in the smelting zone 101 flows into the reduction zone 103 for partial reduction to reduce the nickel content in the slag. At the same time, the nickel matte and the smelting slag are further separated. The smelting slag finally passes through the sedimentation zone 105 and is discharged through the overflow port of the sedimentation zone 105.

[0030] The furnace body 110 includes: a first side wall and a second side wall facing each other in the width direction, a first lance 130 is arranged on the area of ​​the first side wall and / or the second side wall facing the smelting zone 101 and extends into the smelting zone 101, and a second lance 150 is arranged on the area of ​​the first side wall and / or the second side wall facing the reduction zone 103 and extends into the reduction zone 103.

[0031] Specifically, a first lance 130 is inserted into the melt in the smelting zone 101, and a second lance 150 is inserted into the melt in the reduction zone 103. The first and second lances 130, 150 can deliver fuel and oxygen to their respective zones. Natural gas and oxygen-enriched air can be injected into the slag layer in the smelting zone 101 through the first lance 130, allowing the natural gas and oxygen to be fully mixed in the molten pool and directly combusted there to release heat, maintaining the furnace temperature while partially removing sulfur from the material. The second lance 150 can also inject natural gas and oxygen-enriched air into the slag layer in the reduction zone 103, thereby performing partial reduction and reducing the nickel content in the slag layer.

[0032] In the side-blown smelting apparatus 100 of the present embodiment, materials are added through a feed port 107 at the top of the smelting zone 101. Under the action of a first lance 130, fuel and oxygen mix with the high-temperature melt and react violently to produce high-grade, low-sulfur nickel matte and smelting slag. The low-sulfur nickel matte and smelting slag generated in the smelting zone 101 pass through the reduction zone 103 and settling zone 105, respectively, and are further partially reduced by a second lance 150 in the reduction zone 103, thereby achieving continuous production of low-sulfur nickel and depleted smelting slag.

[0033] In some embodiments of the present application, the furnace body 110 also includes: a third side wall 111 and a fourth side wall 113 facing each other in the length direction, the first side wall, the second side wall, the third side wall 111 and the fourth side wall 113 are all formed on the bottom wall of the furnace body 110 and extend upward, and the first side wall, the second side wall, the third side wall 111 and the fourth side wall 113 form an annular structure in the circumferential direction, the third side wall 111 is connected to one end of the first side wall and the second side wall on the same side, and the fourth side wall 113 is connected to the other end of the first side wall and the second side wall on the same side.

[0034] The side-blowing smelting device 100 also includes a first retaining wall 170 and a second retaining wall 190. The first retaining wall 170 and the second retaining wall 190 are arranged in the furnace body 110. The first retaining wall 170 and the second retaining wall 190 are spaced apart in the length direction of the furnace body 110. Specifically, the first retaining wall 170 and the second retaining wall 190 extend along the width direction of the furnace body 110.

[0035] A smelting zone 101 is defined between the first retaining wall 170 and the third side wall 111 , a reduction zone 103 is defined between the first retaining wall 170 and the second retaining wall 190 , and a settling zone 105 is defined between the second retaining wall 190 and the fourth side wall 113 .

[0036] Furthermore, the bottom of the first retaining wall 170 is separated from the bottom wall of the furnace body 110, thereby connecting the melt zone of the smelting zone 101 with the melt zone of the reduction zone 103. This allows the smelting slag generated in the smelting zone 101 to enter the reduction zone 103 for further reduction. The bottom of the second retaining wall 190 is separated from the bottom wall of the furnace body 110, thereby connecting the melt zone of the reduction zone 103 with the melt zone of the settling zone 105. Smelting slag that has undergone further reduction in the reduction zone 103 can enter the settling zone 105 and, after settling, can be discharged from the overflow port. Furthermore, because the second retaining wall 190 is provided between the reduction zone 103 and the settling zone 105, the melt in the settling zone 105 can remain relatively still due to the action of the second retaining wall 190, further facilitating settling. The violently stirred molten pool becomes relatively still under the action of the second retaining wall 190 , and the smelting slag further settles and layers in the settling area 105 , and finally the smelting slag overflows and is discharged through the slag discharge port.

[0037] The nickel matte and smelting slag in the melt flow into the reduction zone 103 through the channel at the lower part of the first retaining wall 170. Under the stirring of the second lance 150, a reduction reaction occurs, and the nickel oxide and copper oxide in the overoxidized nickel slag are partially reduced to nickel and copper, thereby reducing the nickel content and copper content of the smelting slag; the second lance 150 adjusts the reducing property of the gas entering the furnace body 110 by adjusting the ratio of natural gas to oxygen-enriched air.

[0038] In some embodiments of the present application, the furnace body 110 further includes a top wall 115, which is respectively connected to the top of the third side wall 111 and the top of the second retaining wall 190, and the first retaining wall 170 is separated from the top wall 115, so that the gas phase zone of the smelting zone 101 and the gas phase zone of the reduction zone 103 are connected, and the gas generated in the smelting zone 101 and the gas generated in the reduction zone 103 can be discharged outward together through the flue.

[0039] Furthermore, a smoke exhaust duct 117 is provided on the top wall 115, and the smoke exhaust duct 117 extends upward. The smoke exhaust channels in the smoke exhaust duct 117 are connected to the gas phase zone of the smelting zone 101 and the gas phase zone of the reduction zone 103, so that the gas generated in the smelting zone 101 and the gas generated in the reduction zone 103 can be discharged outward together through the smoke exhaust duct 117.

[0040] According to some embodiments of the present application, a charging port 107 is provided on the top wall 115 in an area directly opposite the smelting zone 101. Nickel ore and coal can be added to the smelting zone 101 through the charging port 107. A downwardly extending shield 119 is also provided on the inner sidewall of the top wall 115. The projection of the shield 119 on the bottom wall is located at the projection of the charging port 107 and the projection of the exhaust channel on the bottom wall. Of course, it is understood that the lower end of the shield 119 is spaced apart from the melt in the smelting zone 101.

[0041] In this way, the material entering the smelting zone 101 from the feeding port 107 is prevented from being carried away by the rising flue gas during the descending process, thereby causing waste of nickel ore and coal.

[0042] In some embodiments of the present application, a second tuyere 102 is provided in the area of ​​the first or second sidewall facing the smelting zone 101, and a third tuyere 104 is provided in the area of ​​the top wall 115 facing the reduction zone 103. The height of the second tuyere 102 needs to be greater than the height of the melt within the smelting zone 101. A small amount of elemental sulfur remains in the exhaust gas generated by combustion within the smelting zone 101. Air introduced through the second tuyere 102 can combust the residual elemental sulfur and reduce harmful substances in the exhaust gas. The second tuyere is located on the sidewall below the feed port.

[0043] At the same time, since the first lance 130 and the second lance 150 can inject natural gas into the melt, some of the natural gas cannot be fully burned and may enter the gas phase zone of the smelting zone 101 and the reduction zone 103. At this time, air is blown into the third air port 104 to fully burn the unburned natural gas in the flue gas and reduce the flue gas temperature.

[0044] In some embodiments of the present application, the first retaining wall 170 and the second retaining wall 190 include a first water jacket and a first refractory brick layer disposed outside the first water jacket and in contact with the melt. It will be appreciated that the first retaining wall 170 is disposed in the central region of the furnace body 110, so both sides of the first retaining wall 170 are in contact with the melt. Therefore, the first retaining wall 170 includes a central first water jacket and first refractory brick layers on both sides of the central water jacket, with the first water jacket sandwiched between the two first refractory brick layers. A portion of the second retaining wall 190 is in contact with the melt on only one side, so this portion includes the first refractory brick layer in contact with the melt and the first water jacket disposed outside the first refractory brick layer and not in direct contact with the melt.

[0045] In some embodiments of the present application, the first side wall, the second side wall, the third side wall 111 and the fourth side wall 113 all include: a melt storage area 106a, a bubbling reaction area 106b and an airflow area 106c. The melt storage area 106a and the airflow area 106c include a second refractory brick layer. The melt storage area 106a and the airflow area 106c are both composed of the second refractory brick layer. Because the temperature of the melt storage area 106a and the airflow area 106c is relatively low relative to the bubbling reaction area 106b, and the molten pool is relatively still, they can be composed only of the refractory brick layer at this time; since the bubbling reaction area 106b is the area where fuel, ore and oxygen react violently, the bubbling reaction area 106b needs to be composed of a second refractory brick layer and a second water jacket, thereby improving the service life of the bubbling reaction area 106b.

[0046] In some embodiments of the present application, an upper drain port 108a and a lower drain port 108b, spaced apart in the vertical direction, are provided on the first sidewall or the second sidewall in an area facing the settling zone 105. Thus, when the emergency holding time is long, the upper drain port 108a can be opened to drain the melt level below the upper drain port 108a, while simultaneously adjusting the ratio of oxygen-enriched air and natural gas in the spray gun to achieve the effect of supplementary heat and heat preservation.

[0047] According to the side-blown smelting device 100 of the embodiment of the present application, secondary nickel concentrate, quartz flux and a small amount of pulverized coal are added through the charging port 107 at the top of the smelting zone 101 to produce low-sulfur nickel matte containing 60-70% nickel, smelting slag and flue gas.

[0048] A plurality of first lances 130 provided on the first side wall and / or the second side wall facing the smelting zone 101 are used to inject natural gas into the slag layer of the smelting zone 101. By adjusting the ratio of natural gas to oxygen-enriched air, an oxidizing atmosphere is adjusted to ensure heat supplementation while removing sulfur from the concentrate.

[0049] The reduction zone 103 is separated from the gas phase zone of the smelting zone 101 by a first retaining wall 170. Smelting slag and nickel matte can flow into the reduction zone 103 through a channel at the bottom of the first retaining wall 170. A plurality of second lances 150 provided on the first side wall and / or the second side wall facing the reduction zone 103 blow natural gas into the slag layer to reduce some overoxidized nickel matte and reduce the nickel and copper content in the slag.

[0050] The settling zone 105 is separated from the reduction zone 103 by a third retaining wall, which blocks the melt stirring generated by the tuyere of the reduction zone 103 and forms a relatively static zone in the settling zone 105, which is conducive to the sedimentation and separation of nickel matte.

[0051] The side-blowing smelting device 100 of the present application realizes the production continuity of the secondary nickel concentrate processing process by independently controlling the side-blowing lance in different zones, reduces the sulfur content of the metallized nickel matte, and improves the quality of the nickel anode plate. Since the device adopts an immersion lance immersed in the molten pool, it also has the advantages of high smelting intensity, high fuel utilization rate, and high thermal efficiency.

[0052] The furnace body 110 of the embodiment of the present application is a rectangular furnace body 110, and the lower area of ​​the side wall of the furnace body 110 encloses a melt storage area 106a, where the nickel matte and the smelting slag are statically layered; the nickel matte port 109a and the slag discharge port 109b are respectively located at the two ends of the furnace cylinder, and the nickel matte port is close to the end of the smelting area 101, and is discharged in the form of siphoning or drilling; the slag discharge port is close to the end of the sedimentation area 105, and adopts an overflow discharge structure; two emptying ports are provided in the sedimentation area 105.

[0053] The depth of the molten pool is 1600mm-2000mm, which can be adjusted through the slag overflow port, wherein the nickel layer thickness is 400-600mm; the first lance 130 is immersed in the melt to a depth of 400-700mm, and the distance between the secondary air inlet and the first lance 130 is 3-4m; the first lance 130 extends into the furnace 50-100mm.

[0054] The following briefly describes a smelting method for a side-blowing smelting device according to an embodiment of the present application. The side-blowing smelting device is the above-mentioned side-blowing smelting device. The smelting method includes at least the following steps:

[0055] The ore is added to the smelting zone, and some coal powder can be added to the smelting zone along with the ore, so that the ore can be smelted more easily and quickly, and the ore can be turned into a melt under the action of high temperature.

[0056] The first lance is inserted into the slag in the smelting area. The first lance can spray natural gas and oxygen into the slag. By adjusting the ratio of natural gas and oxygen, an oxidizing atmosphere can be created, thereby oxidizing the sulfur in the ore and then turning it into gas for discharge. However, in the oxidizing atmosphere, the slag layer will inevitably carry a portion of overoxidized nickel matte.

[0057] The slag layer flows to the reduction zone, and a second lance is inserted into the slag in the reduction zone. A reducing atmosphere is achieved by adjusting the ratio of natural gas to oxygen in the second lance (it can be understood that the ratio of oxygen in the second lance to the total gas is lower than the ratio of oxygen in the first lance to the total gas), thereby reducing the peroxide nickel matte dissolved or mechanically entrained in the slag, thereby reducing the nickel content in the slag.

[0058] The slag and nickel matte then enter the sedimentation zone, which is relatively static. The lighter slag is on the top, and the heavier nickel matte settles and is located below.

[0059] The smelting method in the present application realizes the production continuity of the secondary nickel concentrate processing process by independently controlling the side-blowing lance in different zones, reduces the sulfur content of the metallized nickel matte, and improves the quality of the nickel anode plate. Since the smelting method adopts an immersion lance immersed in the molten pool, it also has the advantages of high smelting intensity, high fuel utilization rate, and high thermal efficiency.

[0060] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0061] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions, and variations may be made to the embodiments without departing from the principles and intent of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A side-blowing smelting device, characterized in that: include: A furnace body, wherein a smelting zone, a reduction zone, and a settling zone are sequentially arranged in the longitudinal direction of the furnace body, and the furnace body comprises: a first side wall and a second side wall facing each other in the width direction; a first lance and a second lance, wherein the first lance is disposed on an area of ​​the first sidewall and / or the second sidewall facing the smelting zone and extending into the slag in the smelting zone, and the second lance is disposed on an area of ​​the first sidewall and / or the second sidewall facing the reduction zone and extending into the slag in the reduction zone; The furnace body further comprises: a third side wall and a fourth side wall facing each other in the length direction; The side-blowing smelting device further includes: a first retaining wall and a second retaining wall, wherein the first retaining wall and the second retaining wall are arranged in the furnace body, and the first retaining wall and the second retaining wall are spaced apart in the longitudinal direction of the furnace body; The smelting zone is defined between the first retaining wall and the third side wall, the reduction zone is defined between the first retaining wall and the second retaining wall, and the settling zone is defined between the second retaining wall and the fourth side wall; The bottom of the first retaining wall is spaced apart from the bottom wall of the furnace body so that the melt zone of the smelting zone is connected to the melt zone of the reduction zone, and the bottom of the second retaining wall is spaced apart from the bottom wall of the furnace body so that the melt zone of the reduction zone is connected to the melt zone of the settling zone; The furnace body further includes: a top wall, the top wall being connected to the top end of the third side wall and the top end of the second retaining wall, respectively, the first retaining wall being spaced apart from the top wall so as to allow the gas phase area of ​​the smelting zone to communicate with the gas phase area of ​​the reduction zone; The top wall is also provided with a smoke exhaust pipe, and the exhaust channels in the smoke exhaust pipe are connected to the gas phase area of ​​the smelting zone and the gas phase area of ​​the reduction zone; A feeding port is provided on the top wall in an area facing the smelting zone, and a downwardly extending baffle is further provided on the inner side wall of the top wall, wherein the projection of the baffle on the bottom wall is located between the projection of the feeding port on the bottom wall and the projection of the exhaust channel on the bottom wall; An upper drain port and a lower drain port spaced apart in the up-down direction are provided in a region of the first side wall or the second side wall facing the settling area.

2. The side-blowing smelting device according to claim 1, characterized in that: A second tuyere is provided in an area of ​​the first side wall or the second side wall facing the smelting zone, and a third tuyere is provided in an area of ​​the top wall facing the reduction zone.

3. The side-blowing smelting device according to claim 1, characterized in that: The first retaining wall and the second retaining wall include: a first water jacket and a first refractory brick layer arranged outside the water jacket and in contact with the melt.

4. The side-blowing smelting device according to claim 1, characterized in that: The first to fourth side walls include: a melt storage area, a bubbling reaction area and an airflow area. The melt storage area and the airflow area include: a second refractory brick layer. The bubbling reaction area includes: a third refractory brick layer and a second water jacket arranged outside the third refractory brick layer.

5. A smelting method for a side-blowing smelting device, wherein the side-blowing smelting device is the side-blowing smelting device according to any one of claims 1 to 4, characterized in that: The smelting method comprises at least the following steps: Adding ore to the smelting zone; The first lance is inserted into the slag in the smelting zone, and the ratio of natural gas and oxygen in the first lance is adjusted to achieve an oxidizing atmosphere, ensuring heat replenishment while removing sulfur from the ore; The slag and nickel matte enter the reduction zone, a second lance is inserted into the slag in the reduction zone, and the ratio of natural gas and oxygen in the second lance is adjusted to achieve a reducing atmosphere to reduce the overoxidized nickel matte in the slag; The slag and nickel matte flow into the settling area and the nickel matte is settled and separated in the settling area.

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