Smelting equipment

Abstract

The utility model discloses smelting equipment which comprises a furnace body with a cavity, a furnace cover and a furnace cover. The first retaining wall and the second retaining wall are arranged in the cavity in a spaced mode in the first direction, the first retaining wall is arranged on the bottom wall of the cavity, the second retaining wall is arranged on the top wall of the cavity, and the first retaining wall and the second retaining wall are divided in the cavity to form an oxidation melting area, a reduction vulcanization area and a slag dilution area which are sequentially arranged in the first direction; the oxidation melting zone and the reduction vulcanization zone are formed on two sides of the first retaining wall in the first direction and are communicated in top, and the reduction vulcanization zone and the slag depletion zone are formed on two sides of the second retaining wall in the first direction and are communicated in bottom. Therefore, the interior of the cavity is divided into the oxidation melting area and the reduction vulcanization area, so that mutual influence of oxidation-reduction atmospheres in the two areas is prevented, the controllability of the atmospheres in the smelting equipment is guaranteed, the fuel utilization rate is increased, and molten smelting materials can turn over the first retaining wall and flow into the reduction vulcanization area; and carrying out vulcanization reaction in the reduction vulcanization area to prepare the low nickel matte.

Description

Technical Field

[0001] This application relates to the field of metallurgical equipment technology, and in particular to a smelting device. Background Technology

[0002] Currently, nickel ore used as raw material for low-grade nickel matte production mainly exists in two forms: sulfide nickel ore and laterite nickel ore, with laterite nickel ore accounting for a higher proportion. In related technologies, the process of producing low-grade nickel matte from laterite nickel ore primarily involves adding laterite nickel ore, reducing agent, sulfiding agent, and flux together into a blast furnace, and producing low-grade nickel matte through reduction sulfidation. This preparation process suffers from problems such as high fuel efficiency, low sulfiding agent utilization, and high cost. Furthermore, controlling the reducing atmosphere is difficult, affecting the yield and quality of low-grade nickel matte. Utility Model Content

[0003] This application aims to at least solve one of the technical problems existing in the prior art. To this end, one object of this application is to provide a smelting device that has good smelting effect and high efficiency.

[0004] A smelting apparatus includes: a furnace body having a cavity; a first baffle wall and a second baffle wall, the first baffle wall and the second baffle wall being arranged at intervals along a first direction within the cavity, the first baffle wall being disposed on the bottom wall of the cavity, and the second baffle wall being disposed on the top wall of the cavity, the first baffle wall and the second baffle wall being separated within the cavity to form an oxidation melting zone, a reduction sulfidation zone and a slag depletion zone arranged sequentially along the first direction; wherein the oxidation melting zone and the reduction sulfidation zone are formed on both sides of the first baffle wall in the first direction and are connected at the top, and the reduction sulfidation zone and the slag depletion zone are formed on both sides of the second baffle wall in the first direction and are connected at the bottom.

[0005] In some embodiments of this application, the furnace body is provided with: a first feeding section, which is connected to the oxidation melting zone and is used to add combustible materials to the oxidation melting zone; and a second feeding section, which is connected to the reduction sulfidation zone and is used to add combustible materials to the reduction sulfidation zone.

[0006] In some embodiments of this application, the first feeding part is connected to the oxidation melting zone at a position not higher than the top of the first baffle wall; and / or, the second feeding part is connected to the reduction sulfidation zone at a position not higher than the top of the first baffle wall; and / or, in the vertical direction of the furnace body, the height positions of the first feeding part and the second feeding part are the same.

[0007] In some embodiments of this application, the furnace body is further provided with a third feeding section, which is used to add a vulcanizing agent to the reduction vulcanization zone, and the communication position between the third feeding section and the reduction vulcanization zone is located below the communication position between the second feeding section and the reduction vulcanization zone.

[0008] In some embodiments of this application, the furnace body is provided with: a first discharge port, which is connected to the oxidation melting zone and is located near the bottom wall of the oxidation melting zone; and a second discharge port, which is connected to the oxidation melting zone and is located above the connection point between the first discharge port and the oxidation melting zone.

[0009] In some embodiments of this application, the second discharge port is positioned below the position where the oxidation melting zone is connected to the first feeding section.

[0010] In some embodiments of this application, the furnace body is provided with a first feeding port, which is connected to the oxidation melting zone and is used to add smelting materials to the oxidation melting zone.

[0011] In some embodiments of this application, the smelting equipment further includes a flue gas exhaust section, which forms a flue gas duct communicating with the reduction sulfidation zone, and the flue gas duct communicating with the reduction sulfidation zone is located at one end of the reduction sulfidation zone away from the oxidation melting zone.

[0012] In some embodiments of this application, a baffle is provided inside the cavity, and the baffle is disposed near the connection between the flue and the reduction vulcanization zone. In the first direction, the connection between the flue and the reduction vulcanization zone is located between the baffle and the second baffle wall.

[0013] In some embodiments of this application, the furnace body is provided with a first communication port, which is connected to the reduction and vulcanization zone, and in the first direction, the communication position between the first communication port and the reduction and vulcanization zone is located on the side of the baffle screen away from the communication position between the flue and the reduction and vulcanization zone; and / or, the exhaust section is further provided with a second communication port, which is connected to the flue, and the second communication port can be used to burn combustible materials in the flue.

[0014] In some embodiments of this application, the cavity is further provided with a second feeding port, which is connected to the slag depletion zone and is used to add combustion materials to the slag depletion zone; and / or, the smelting equipment further includes electrodes, at least some of which are located in the slag depletion zone.

[0015] In some embodiments of this application, the cavity is further provided with: a third discharge port, which is connected to the slag depletion zone and is located near the bottom wall of the slag depletion zone; and a fourth discharge port, which is connected to the slag depletion zone and is located above the connection point between the third discharge port and the slag depletion zone.

[0016] In some embodiments of this application, the bottom wall of the cavity includes a first bottom wall and a second bottom wall disposed on both sides of the first baffle in a first direction; wherein, the first bottom wall is the wall surface of the oxidation melting zone and slopes downward from the first baffle along the first direction toward the side away from the reduction sulfidation zone; the second bottom wall is the wall surface of the reduction sulfidation zone and the slag depletion zone and slopes downward from the first baffle along the first direction toward the side away from the oxidation melting zone.

[0017] The smelting equipment according to the embodiments of this application has at least the following advantages:

[0018] (1) A first baffle and a second baffle are provided on the furnace body to improve the controllability of the oxidizing atmosphere in the oxidizing melting zone and the reducing atmosphere in the reducing sulfidation zone of the smelting equipment.

[0019] (2) Combustible materials (such as oxygen-enriched air and pulverized coal) can be added into the cavity through the first feeding section and the second feeding section. Pulverized coal can be directly burned inside the smelting material to supplement the heat of the smelting material in the cavity through the combustible material, and can improve the utilization efficiency of the reducing agent in the reduction sulfidation zone.

[0020] (3) Liquid sulfur is added to the reduction and sulfidation zone through the third feeding section so that it can directly participate in the sulfidation reaction while stirring the melt with liquid sulfur.

[0021] (4) An electrode and a second feed port are provided in the slag depletion zone, which can increase the temperature of the slag layer in the slag depletion zone and carry out a reduction reaction, thereby improving the fluidity of the slag layer and increasing the nickel recovery rate.

[0022] (5) A first connecting port is provided on the furnace body to deliver oxygen into the furnace body through the first connecting port, so that the carbon monoxide gas in the flue gas in the furnace body can be burned and generate heat. The heat can be transferred to the melt (i.e. the material in the reduction and sulfidation zone) side under the drive of the gas delivered through the first connecting port.

[0023] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0024] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0025] Figure 1 This is a schematic diagram of a smelting apparatus according to one embodiment of this application;

[0026] Figure 2 yes Figure 1 Sectional view at the center line BB;

[0027] Figure 3 This is a schematic diagram illustrating the interaction between the spray gun and the furnace body according to one embodiment of this application;

[0028] Figure 4 This is a schematic diagram illustrating the cooperation between the first channel and the second channel according to an embodiment of this application.

[0029] Figure label:

[0030] Smelting equipment 100; smelting materials 200; slag layer 201; low-grade nickel matte melt layer 202;

[0031] Furnace body 1; cavity 10; oxidation melting zone 101; reduction sulfidation zone 102; melt storage zone 1021; bubbling reaction zone 1022; gas flow zone 1023; slag depletion zone 103;

[0032] First feeding section 11; Second feeding section 12; Third feeding section 13; Pulverized coal spray gun 111; First channel 1111; Second channel 1112; Base 112; Heat-resistant layer 113;

[0033] First discharge port 141; Second discharge port 142; Third discharge port 143; Fourth discharge port 144; Slag discharge port 145;

[0034] First feeding port 151; Second feeding port 152; Smoke exhaust section 16; Flue 161; Second connecting port 162; Baffle 17; First connecting port 18; First bottom wall 191; Second bottom wall 192;

[0035] First retaining wall 21; first water jacket 211; second retaining wall 22; second water jacket 221; third water jacket 23; electrode 3. Detailed Implementation

[0036] The embodiments of this application are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this application, and should not be construed as limiting this application.

[0037] The following is for reference. Figures 1-3The smelting apparatus 100 according to an embodiment of this application is described. The smelting apparatus 100 can be used to smelt metal ores to produce metals, such as producing low-grade nickel matte by smelting nickel sulfide ore or laterite nickel ore. In this application, laterite nickel ore is used as an example of the smelting material 200 for description.

[0038] The smelting apparatus 100 according to an embodiment of this application includes a furnace body 1, a first baffle wall 21, and a second baffle wall 22. The furnace body 1 has a cavity 10, the interior of which is a reaction space for the smelting material 200 (such as the laterite nickel ore mentioned above). The first baffle wall 21 and the second baffle wall 22 are both disposed within the cavity 10 to separate the cavity 10, thereby forming multiple reaction zones within the cavity 10 to meet the smelting requirements of the smelting material 200. The smelting material 200 can be a mixture of laterite nickel ore and flux.

[0039] Reference Figure 1 The first baffle wall 21 and the second baffle wall 22 are arranged at intervals along the first direction in the cavity 10. The first baffle wall 21 is set on the bottom wall of the cavity 10, and the second baffle wall 22 is set on the top wall of the cavity 10. The first baffle wall 21 and the second baffle wall 22 are separated in the cavity 10 to form an oxidation melting zone 101, a reduction sulfidation zone 102 and a slag depletion zone 103 arranged sequentially along the first direction.

[0040] The first baffle wall 21 and the second baffle wall 22 both extend vertically. The top of the first baffle wall 21 is spaced apart from the top wall of the cavity 10, so that the oxidation melting zone 101 and the reduction sulfidation zone 102 are formed on both sides of the first baffle wall 21 in the first direction and are connected at the top; the bottom of the second baffle wall 22 is spaced apart from the bottom wall of the cavity 10, so that the reduction sulfidation zone 102 and the slag depletion zone 103 are formed on both sides of the second baffle wall 22 in the first direction and are connected at the bottom.

[0041] Specifically, the oxidation melting zone 101 is used to melt the smelting material 200. After melting, the smelting material 200 in the oxidation melting zone 101 can enter the reduction sulfidation zone 102 through the top of the first baffle wall 21. The smelting material 200 undergoes a sulfidation reaction in the reduction sulfidation zone 102. The slag after the sulfidation reaction can enter the slag depletion zone 103 through the gap between the second baffle wall 22 and the bottom wall. The slag depletion zone 103 can be used to reheat the slag to improve the discharge effect of high melting point slag.

[0042] Currently, nickel ore used as raw material for low-grade nickel matte production mainly exists in two forms: sulfide nickel ore and laterite nickel ore, with laterite nickel ore accounting for a higher proportion. In related technologies, the process of producing low-grade nickel matte from laterite nickel ore primarily involves adding laterite nickel ore, reducing agent, sulfiding agent, and flux together into a blast furnace, and producing low-grade nickel matte through reduction sulfidation. This preparation process suffers from problems such as high fuel efficiency, low sulfiding agent utilization, and high cost. Furthermore, controlling the reducing atmosphere is difficult, affecting the yield and quality of low-grade nickel matte.

[0043] In this application, a first baffle wall 21 and a second baffle wall 22 are provided inside the cavity 10. The first baffle wall 21 can separate an oxidation melting zone 101 and a reduction sulfidation zone 102 within the cavity 10 to prevent the oxidation-reduction atmospheres in the two zones from affecting each other, ensuring the controllability of the atmosphere in the smelting equipment 100 and improving fuel utilization. Simultaneously, the oxidation melting zone 101 is used to melt the smelting material 200, and the melted smelting material 200 can pass over the first baffle wall 21 and flow into the reduction sulfidation zone 102 to undergo a sulfidation reaction, thereby directly preparing low-grade nickel matte within the cavity 10.

[0044] In some embodiments of this application, the furnace body 1 is provided with a first feeding section 11 and a second feeding section 12.

[0045] The first feeding section 11 is connected to the oxidation melting zone 101 and is used to add combustible materials to the oxidation melting zone 101 to increase the temperature of the oxidation melting zone 101 by increasing the combustible materials, thereby ensuring the melting effect of the molten material 200 in the oxidation melting zone 101; the second feeding section 12 is connected to the reduction vulcanization zone 102 and is used to add combustible materials to the reduction vulcanization zone 102 to increase the temperature of the reduction vulcanization zone 102 by increasing the combustible materials, thereby ensuring the reduction vulcanization effect in the reduction vulcanization zone 102.

[0046] It should be noted that the "combustion materials" mentioned above include combustion-supporting materials (such as oxygen) and combustible materials (such as pulverized coal). Combustion-supporting materials can improve the combustion effect of combustible materials. For example, when oxygen and pulverized coal are added to the oxidation melting zone 101 at the same time, the pulverized coal can be fully burned, and the temperature in the oxidation melting zone 101 is increased, thereby causing the smelting material 200 to melt rapidly.

[0047] It is understandable that the oxidation melting zone 101 is used to melt the molten material 200. The molten material 200 can flow from the space between the top of the first baffle 21 and the top wall of the cavity 10 to the reduction vulcanization zone 102. The molten material 200 can be reduced vulcanized in the reduction vulcanization zone 102.

[0048] In this application, the oxidizing melting zone 101 and the reducing sulfidation zone 102 are separated by a first baffle 21 to ensure an oxidizing atmosphere in the oxidizing melting zone 101 and a reducing atmosphere in the reducing sulfidation zone 102. Combustion materials can be added to the oxidizing melting zone 101 through the first feeding section 11 and to the reducing sulfidation zone 102 through the second feeding section 12, thereby helping to increase the temperature of the oxidizing melting zone 101 and the reducing sulfidation zone 102 and ensuring the smelting effect of the smelting equipment 100.

[0049] like Figure 1 As shown, in some embodiments of this application, the communication position between the first feeding part 11 and the oxidation melting zone 101 is not higher than the top of the first baffle 21, so that the combustion material added to the oxidation melting zone 101 by the first feeding part 11 can be immersed in the molten material 200, thereby improving the heating effect of the combustion material on the molten material 200 and thus improving the melting efficiency of the molten material 200.

[0050] In the smelting equipment 100, a mixture of laterite nickel ore and flux (i.e., smelting material 200) is first added to the oxidation melting zone 101, and the smelting material 200 is melted under the heating action of the first feeding section 11.

[0051] Unmelted molten material 200 can be piled in the oxidation melting zone 101, and after being heated and melted by the combustor, the molten material 200 can roll from the top of the first baffle wall 21 into the reduction sulfidation zone 102. If the height of the first feeding part 11 is higher than the first baffle wall 21, it cannot be guaranteed that the combustor added by the first feeding part 11 to the oxidation melting zone 101 will act on the interior of the molten material 200, affecting the heating efficiency of the combustor on the molten material 200, thus resulting in low melting efficiency of the molten material 200.

[0052] In this application, the height of the first feeding section 11 is not higher than the first baffle wall 21. When the height of the molten material 200 stacked in the oxidation melting zone 101 is higher than the first feeding section 11 or level with the top of the first baffle wall 21, the first feeding section 11 can be immersed in the molten material 200. This allows the heat released during the combustion process of the combustion material added to the oxidation melting zone 101 by the first feeding section 11 to be fully applied to the molten material 200, thereby improving the melting efficiency of the molten material 200. In other words, the molten material (such as laterite nickel ore and flux) in the oxidation melting zone 101 can undergo a violent oxidation reaction under the stirring of the combustion material, so that the molten material 200 melts.

[0053] like Figure 1As shown, in some embodiments of this application, the second feeding section 12 is connected to the reduction and sulfidation zone 102 at a position not higher than the top of the first baffle wall 21, so that the combustible material added to the reduction and sulfidation zone 102 by the second feeding section 12 can be immersed in the slag layer 201 formed by the smelting material 200, and the combustible material can be fully combusted and reheated in the reduction and sulfidation zone 102 to improve the reduction reaction effect of the smelting equipment 100 in the reduction and sulfidation zone 102.

[0054] It should be noted that the second feeding section 12 is used to add combustible materials to the reduction and sulfidation zone 102. By controlling the ratio of combustible materials to oxygen, the reducing atmosphere in the reduction and sulfidation zone is ensured while the temperature of the melt in the reduction and sulfidation zone 102 is increased, thereby enhancing the reduction reaction effect of the reduction and sulfidation zone 102. Both the first feeding section 11 and the second feeding section 12 are used to increase the temperature inside the furnace body 1 to ensure the melting efficiency of the molten material 200 in the oxidation melting zone 101 and the reduction reaction effect in the reduction and sulfidation zone 102.

[0055] Reference Figure 1 In the vertical direction, the first feeding part 11 is arranged below the top of the first baffle wall 21. When a certain amount of molten material 200 is added to the oxidation melting zone 101, at least part of the first feeding part 11 can be buried in the molten material 200 to heat it from the inside of the molten material 200, improve the contact effect between the burning material and the molten material 200, improve the heat utilization rate, and thus improve the melting effect of the molten material 200.

[0056] Reference Figure 1 In the vertical direction, the second feeding part 12 is arranged below the top of the first baffle wall 21. When the molten material 200 enters the reduction and sulfidation zone 102 after passing through the oxidation melting zone 101, at least part of the second feeding part 12 can be buried in the molten material 200 to supplement the heat of the reduction and sulfidation zone 102.

[0057] During the smelting process in the smelting equipment 100, it is preferable to immerse the first feeding section 11 and the second feeding section 12 below the molten material 200, with an immersion depth of 700mm-1000mm. It should be noted that the specific arrangement of the first feeding section 11 and the second feeding section 12 in the smelting equipment 100 can be designed according to the dimensions of the smelting equipment 100.

[0058] like Figure 1 As shown, in some embodiments of this application, the height of the first feeding part 11 and the height of the second feeding part 12 are the same in the vertical direction of the furnace body 1, so as to facilitate the operator to operate the first feeding part 11 and the second feeding part 12.

[0059] In some embodiments of this application, the first feeding section 11 and the second feeding section 12 can both be configured as a pulverized coal spray gun 111 to add combustible material into the cavity 10 through the pulverized coal spray gun 111.

[0060] Reference Figure 3 The pulverized coal injection gun 111 has a first channel 1111 and a second channel 1112. The first channel 1111 is used to supply oxygen-enriched air, and the second channel 1112 is used to supply pulverized coal. Oxygen-enriched air and pulverized coal are added to the cavity 10 (i.e., the oxidation melting zone 101 and the reduction sulfidation zone 102) through the pulverized coal injection gun 111, so that the pulverized coal can be fully burned, thereby supplementing heat to the cavity 10.

[0061] It should be noted that the first channel 1111 and the second channel 1112 can respectively add combustion materials into the cavity 10. The first channel 1111 can be constructed in a ring shape and arranged around the second channel 1112, so that the oxygen-enriched air added into the cavity 10 and the pulverized coal can be in full contact, thereby making the pulverized coal burn completely.

[0062] Reference Figure 3 A base 112 is provided on the pulverized coal injection gun 111. The base 112 is embedded in the side wall of the furnace body 1 and is connected and fixed to the furnace body 1 so as to install and fix the pulverized coal injection gun 111 on the furnace body 1. The base 112 can be connected and cooperated with the furnace body 1 by bolts or other connecting components, which is simple and reliable in installation.

[0063] In a further embodiment of this application, the seat 112 is constructed as a water jacket, that is, a flow channel is formed inside the seat 112, and the flow channel can be used for coolant (such as water) to carry away the heat at the seat 112, thereby playing a role in cooling and preventing the temperature at the pulverized coal injection gun 111 from being too high.

[0064] Reference Figure 3 As shown, the base 112 is embedded in the side wall of the furnace body 1, and the inner wall of the base 112 (i.e., the wall surface adjacent to the molten medium) can be flush with the inner wall surface of the furnace body 1. Furthermore, the base 112 is provided with a heat-resistant layer 113, which can improve the heat resistance of the pulverized coal injection lance 111, thereby reducing the impact of heat from the cavity 10 on the pulverized coal injection lance 111. The heat-resistant layer 113 can be made of heat-resistant stainless steel through welding, and the welding thickness of the heat-resistant layer 113 is preferably in the range of 5mm-10mm, but is not limited to this.

[0065] It should be noted that the first feeding section 11 and the second feeding section 12 can have the same structure, and the first feeding section 11 and the second feeding section 12 can add the same combustion material (i.e., oxygen-enriched air and pulverized coal) into the cavity 10. By adjusting the ratio of pulverized coal to oxygen-enriched air, the oxidizing atmosphere of the oxidizing melting zone 101 and the reducing atmosphere of the reducing sulfidation zone 102 can be adjusted.

[0066] In some embodiments of this application, the pressure of the gas and pulverized coal added into the cavity 10 by the pulverized coal spray gun 111 can be controlled within the range of 0.15 MPa-0.2 MPa to meet the addition effect of pulverized coal and oxygen-enriched air.

[0067] Furthermore, the pulverized coal injection gun 111 extends into the furnace body 1 by a size ranging from 50mm to 100mm, and the end of the pulverized coal injection gun 111 is provided with a flange, which can be connected to the base body 112 by bolts.

[0068] like Figure 1 As shown, in some embodiments of this application, the furnace body 1 is further provided with a third feeding section 13, which is used to add vulcanizing agent to the reduction vulcanization zone 102, and the communication position between the third feeding section 13 and the reduction vulcanization zone 102 is located below the communication position between the second feeding section 12 and the reduction vulcanization zone 102.

[0069] It should be noted that the sulfiding agent is used to undergo a reduction reaction with the molten material to reduce it to metal (such as nickel) and form slag. In the reduction reaction, metal can be reduced and slag formed. In some embodiments, the chemical reaction formulas involved are as follows: (MO + C(CO) = M + CO(CO2), FeO + SiO2 = 2FeO·SiO2), where M represents a metal element, C represents carbon, and O represents oxygen.

[0070] Furthermore, the "vulcanizing agent" can be liquid sulfur. Liquid sulfur has good fluidity, which can ensure the conveying effect of the third feeding section 13 to the reduction vulcanization zone 102, and facilitate the full contact between the vulcanizing agent and the molten material to improve the reduction reaction effect in the reduction vulcanization zone 102.

[0071] Reference Figure 3 As shown, in the vertical direction of the furnace body 1, the third feeding section 13 is located below the second feeding section 12, which can further improve the utilization rate of the vulcanizing agent.

[0072] It is understandable that the temperature of the molten material in the reduction sulfidation zone 102 can be further increased after being reheated by the second feeding section 12, and the sulfiding agent added to the reduction sulfidation zone 102 by the third feeding section 13 can be blown into the low-grade nickel matte melt layer 202 formed by the molten material, so that it can directly participate in the sulfidation reaction while stirring the melt in the reduction sulfidation zone 102 by the sulfiding agent, thereby improving the utilization rate of the sulfiding agent.

[0073] Reference Figure 2 In some embodiments of this application, the third feeding section 13 is configured as a sulfur spray gun, and the output end of the sulfur spray gun (i.e. the outlet of liquid sulfur) is connected to the reduction and sulfidation zone 102. The sulfur spray gun has a good feeding effect and can ensure the addition effect of the sulfiding agent.

[0074] In this application, the sulfiding agent added to the reduction sulfidation zone 102 via a sulfur spray gun can effectively agitate the melt, and the sulfiding agent reacts with the metal in the reduction sulfidation zone 102. The chemical formula of the reaction is as follows: 2Me + S2 = 2MeS, where Me represents an alloying element, such as the metallic element nickel (Ni).

[0075] Reference Figure 1 It should be noted that the number of the first feeding section 11, the second feeding section 12, and the third feeding section 13 is preferably multiple to improve the effect of adding materials into the cavity 10. The multiple first feeding sections 11, the multiple second feeding sections 12, and the multiple third feeding sections 13 can be arranged sequentially along the first direction. The number of the first feeding sections 11, the second feeding sections 12, and the third feeding sections 13 can be set according to the size of the furnace body 1 and the smelting requirements, and is not specifically limited here.

[0076] like Figure 1 As shown, in some embodiments of this application, the furnace body 1 is provided with a first discharge port 141 and a second discharge port 142.

[0077] The first discharge port 141 is connected to the oxidation melting zone 101 and is located near the bottom wall of the oxidation melting zone 101. This allows for the full discharge of materials from the oxidation melting zone 101, facilitating maintenance or cleaning of the zone. It is understood that the materials discharged from the oxidation melting zone 101 may include laterite nickel ore, flux, etc.

[0078] Reference Figure 1The second discharge port 142 is connected to the oxidation melting zone 101, and the connection position between the second discharge port 142 and the oxidation melting zone 101 is located above the connection position between the first discharge port 141 and the oxidation melting zone 101, so that the material in the oxidation melting zone 101 can be discharged through the second discharge port 142.

[0079] In this application, when the material in the oxidizing and melting zone 101 needs to be discharged, the second discharge port 142 can be opened first to discharge the material in the upper region of the oxidizing and melting zone 101 through the second discharge port 142, and then the first discharge port 141 can be opened to fully discharge the material in the oxidizing and melting zone 101 through the first discharge port 141.

[0080] Understandably, when the material content in the oxidizing and melting zone 101 is high (i.e., the material height in the oxidizing and melting zone 101 is high), the discharge pressure generated by the material is high. If the material is discharged only through the first discharge port 141 located at the bottom, the impact force generated by the material at the first discharge port 141 during the discharge process is large, increasing the difficulty of collecting the material during discharge. In this application, the second discharge port 142 can be used in conjunction with the first discharge port 141. First, a portion of the material is discharged through the second discharge port 142, and then the material in the oxidizing and melting zone 101 is further emptied through the first discharge port 141.

[0081] like Figure 1 As shown, in some embodiments of this application, the communication position between the second discharge port 142 and the oxidation melting zone 101 is set lower than the communication position between the first feeding part 11 and the oxidation melting zone 101, so that the first feeding part 11 can be exposed after the material of the oxidation melting zone 101 is discharged through the second discharge port 142.

[0082] Reference Figure 1 In the vertical direction, the second discharge port 142 is set lower than the first feeding part 11 to facilitate the inspection and maintenance of the first feeding part 11. When the first feeding part 11 needs to be inspected or maintained, the material in the oxidation melting zone 101 can be discharged through the second discharge port 142, exposing the first feeding part 11 and meeting the inspection and maintenance needs of the first feeding part 11.

[0083] In some preferred embodiments, the second discharge port 142 is 300mm-400mm lower than the first feeding part 11 in the vertical direction, so as to fully expose the first feeding part 11 and leave a certain space between the upper surface of the material and the first feeding part 11 to facilitate operation by the operator.

[0084] like Figure 1As shown, in some embodiments of this application, the first discharge port 141 and the second discharge port 142 are located on the same side of the furnace body 1, so that the material discharged from the oxidation melting zone 101 can be collected from the same side.

[0085] Reference Figure 1 Furthermore, the first discharge port 141 and the second discharge port 142 are disposed on the side wall of the furnace body 1 opposite to the first baffle wall 21, so that the first discharge port 141 and the second discharge port 142 are arranged in a position suitable for avoiding equipment arranged around the smelting equipment 100.

[0086] like Figure 1 As shown, in some embodiments of this application, the furnace body 1 is provided with a first feeding port 151, which is connected to the oxidation melting zone 101, and the first feeding port 151 is used to add smelting material 200 (such as a mixture of laterite nickel ore and flux) to the oxidation melting zone 101.

[0087] The first feeding port 151 is used to add molten material 200 into the cavity 10, reducing the difficulty of adding molten material 200. Furthermore, molten material 200 can be added to the oxidation melting zone 101 at any time during the molten process of the molten equipment 100 without opening the top cover of the furnace body 1.

[0088] Reference Figure 1 The first feeding port 151 is positioned above the cavity 10, and the first feeding port 151 is located directly above the oxidation melting zone 101. The molten material 200 added through the first feeding port 151 can fall into the oxidation melting zone 101 to ensure the feeding effect at the first feeding port 151.

[0089] In some embodiments of this application, the number and distribution of the first feeding port 151 can be set according to the size of the oxidation melting zone 101 to ensure the reliability of the first feeding port 151 in adding molten material 200 to the oxidation melting zone 101.

[0090] like Figure 1 As shown, in some embodiments of this application, the smelting equipment 100 further includes a flue gas section 16, which forms a flue gas 161 communicating with the reduction sulfidation zone 102, and the flue gas 161 communicating with the reduction sulfidation zone 102 is located at the end of the reduction sulfidation zone 102 away from the oxidation melting zone 101.

[0091] The smelting equipment 100 will generate emissions such as flue gas during the smelting process. The emissions can be discharged to the outside through the flue 161 to facilitate the treatment of the dust and other substances generated during the smelting process.

[0092] Reference Figure 1In the smelting equipment 100, a flue gas zone is formed in the top space of the cavity 10. The flue gas zone is formed above the oxidation melting zone 101 and the reduction sulfidation zone 102, that is, the top space of the cavity 10 that is not occupied by the smelting material 200. The flue gas zone is connected to the flue 161 to meet the dust emission requirements of the smelting equipment 100.

[0093] like Figure 1 As shown, the exhaust section 16 is installed on the furnace body 1, and the connection between the flue 161 and the reduction sulfidation zone 102 is located on the side away from the oxidation melting zone 101 in the first direction. This is beneficial for negative pressure control in the smelting equipment 100, so that the exhaust material in the cavity 10 can enter the flue 161 after flowing through the oxidation melting zone 101 and the reduction sulfidation zone 102. This prevents the leakage of incompletely burned materials (such as carbon monoxide generated by pulverized coal combustion) from the flue 161, allowing the materials to burn completely.

[0094] like Figure 1 As shown, in some embodiments of this application, a baffle 17 is provided inside the cavity 10, and the baffle 17 is located near the connection between the flue 161 and the reduction and vulcanization zone 102. In the first direction, the connection between the flue 161 and the reduction and vulcanization zone 102 is located between the baffle 17 and the second baffle wall 22, so as to prevent the gas in the reduction and vulcanization zone 102 from being directly discharged through the exhaust section 16 located at the top of the furnace body 1, so that the flue gas in the oxidation melting zone 101 and the reduction and vulcanization zone 102 can be discharged together after merging.

[0095] Understandably, installing a baffle 17 at the connection between flue 161 and reduction sulfidation zone 102 increases the flow path of flue gas within cavity 10, improving combustion efficiency. Specifically, when pulverized coal and oxygen-enriched air are added to cavity 10, CO (carbon monoxide) gas is generated. Unburned carbon monoxide gas tends to converge towards the top of cavity 10; the baffle 17 prevents direct discharge from flue 161. Simultaneously, the baffle 17 allows flue gas at the top of cavity 10 to flow towards the slag layer 201 in the reduction melting zone, promoting more complete combustion of carbon monoxide.

[0096] In some embodiments of this application, a water jacket structure, such as a copper water jacket, is provided at the baffle 17 to reduce and prevent the temperature at the baffle 17 from becoming too high. The baffle 17 can also provide preliminary cooling for the flue gas flowing into the flue 161 to prevent the flue gas temperature entering the flue 161 from becoming too high.

[0097] like Figure 1As shown, in some embodiments of this application, the furnace body 1 is provided with a first communication port 18, which is connected to the reduction and sulfidation zone 102. The first communication port 18 can be used to supply combustion-supporting gas (such as oxygen-enriched air) into the reduction and sulfidation zone 102, so that the combustibles (such as elemental sulfur, carbon monoxide gas, etc.) in the furnace body 1 can be fully burned.

[0098] Reference Figure 1 In the first direction, the connection position between the first connecting port 18 and the reduction vulcanization zone 102 is located on the side of the baffle 17 away from the connection position between the flue 161 and the reduction vulcanization zone 102. Oxygen-enriched air can be supplied to the cavity 10 through the first connecting port 18 before the flue gas is discharged, so that the combustibles in the cavity 10 can be fully burned, and under the action of the oxygen-enriched air, heat can be transferred to the melt side in the reduction vulcanization zone 102.

[0099] like Figure 1 As shown, in some embodiments of this application, the exhaust section 16 is further provided with a second communication port 162, which is connected to the flue 161. The second communication port 162 can be used to burn combustible materials in the flue 161, so as to reduce the amount of unburned combustible materials such as elemental sulfur and pulverized coal mixed in the flue gas discharged through the flue 161.

[0100] like Figure 1 As shown, in some embodiments of this application, the cavity 10 is further provided with a second feeding port 152, which is connected to the slag depletion zone 103. The second feeding port 152 is used to add combustible material to the slag depletion zone 103 so as to supplement the heat and raise the temperature of the slag layer 201 in the slag depletion zone 103 through the combustion of the combustible material. The combustible material can be combustible materials such as coal, and is not specifically limited here.

[0101] It is understandable that by increasing the temperature of the slag layer 201 in the slag depletion zone 103, the viscosity of the slag layer 201 can be reduced, the fluidity of the slag layer 201 can be increased, and the slag layer 201 can be discharged from the slag discharge port 145 formed on the furnace body 1.

[0102] like Figure 1 As shown, in some embodiments of this application, the smelting equipment 100 further includes electrodes 3, and at least a portion of the electrodes 3 are disposed within the slag depletion zone 103. The electrodes 3 can be energized to reduce the nickel slag in the slag layer 201 of the slag depletion zone 103, thereby reducing the nickel content in the slag layer 201 and improving the nickel recovery rate. It should be noted that during the reduction of the nickel slag by the electrodes 3, the electrodes 3 can be inserted into the slag layer 201 to achieve full contact between the electrodes 3 and the nickel slag, ensuring the reduction effect.

[0103] Therefore, by setting an electrode 3 and a second feed port 152 in the slag depletion zone 103, the smelting equipment 100 in this application can increase the temperature of the slag layer 201 in the slag depletion zone 103 and carry out a reduction reaction, thereby improving the fluidity of the slag layer 201 and reducing the nickel content in the slag layer 201.

[0104] like Figure 1 As shown, in some embodiments of this application, the cavity 10 is further provided with a third discharge port 143 and a fourth discharge port 144.

[0105] The third discharge port 143 is connected to the slag depletion zone 103, and the third discharge port 143 is located near the bottom wall of the slag depletion zone 103 and is used to discharge low-grade nickel matte located at the bottom wall of the cavity 10; the fourth discharge port 144 is connected to the slag depletion zone 103, and the connection position of the fourth discharge port 144 and the slag depletion zone 103 is located above the connection position of the third discharge port 143 and the slag depletion zone 103.

[0106] Understandably, when the amount of low-grade nickel matte produced in the smelting equipment 100 reaches a certain quantity, it can be discharged through the third discharge port 143 and the fourth discharge port 144.

[0107] In this application, when the material in the slag depletion zone 103 (such as low-grade nickel matte, nickel slag, etc.) needs to be discharged, the fourth discharge port 144 can be opened first to discharge the material in the upper area of ​​the slag depletion zone 103 through the fourth discharge port 144, and then the third discharge port 143 can be opened to fully discharge the material in the slag depletion zone 103 through the third discharge port 143.

[0108] Understandably, when the material content in the slag depletion zone 103 is high (i.e., the material height in the slag depletion zone 103 is high), the discharge pressure generated by the material is relatively large. If the material is discharged only through the third discharge port 143 located at the bottom, the impact force generated by the material at the third discharge port 143 during the discharge process is relatively large, increasing the collection difficulty when the material (e.g., low-grade nickel matte) is discharged. In this application, the third discharge port 143 can be used in conjunction with the fourth discharge port 144. First, part of the material is discharged through the fourth discharge port 144, and then the material in the slag depletion zone 103 is further emptied through the third discharge port 143.

[0109] It should be noted that when the smelting equipment 100 needs to vent the reduction sulfidation zone 102 and the slag depletion zone 103, the nickel slag and low-grade nickel matte located in the reduction sulfidation zone 102 and the slag depletion zone 103 can be discharged through the third discharge port 143 and the fourth discharge port 144. The first baffle wall 21 is installed on the bottom wall of the cavity 10 to divide the cavity 10 into two non-connected parts at the bottom: one part is the oxidation melting zone 101, and the other part is the reduction sulfidation zone 102 and the slag depletion zone 103. These two parts cannot be discharged through the same discharge structure. Therefore, the furnace body 1 has discharge structures on both sides in the first direction, namely, the first discharge port 141 and the second discharge port 142 located on one side of the first baffle wall 21 in the first direction, and the third discharge port 143 and the fourth discharge port 144 located on the other side of the first baffle wall 21 in the first direction.

[0110] like Figure 1 As shown, in some embodiments of this application, the bottom wall of the cavity 10 includes a first bottom wall 191 and a second bottom wall 192 disposed on both sides of the first baffle 21 in a first direction. The first bottom wall 191 is the wall surface of the oxidation melting zone 101 and slopes downwards from the first baffle 21 along the first direction away from the reduction sulfidation zone 102, thereby causing the molten material 200 in the oxidation melting zone 101 to have a tendency to be discharged away from the first baffle 21, thus assisting in emptying the material in the oxidation melting zone 101. The second bottom wall 192 is the wall surface of the reduction sulfidation zone 102 and the slag depletion zone 103 and slopes downwards from the first baffle 21 along the first direction away from the oxidation melting zone 101, thereby causing the material (e.g., low-grade nickel matte, slag layer 201) in the reduction sulfidation zone 102 and the slag depletion zone 103 to have a tendency to be discharged away from the first baffle 21, thus assisting in emptying the reduction sulfidation zone 102 and the slag depletion zone 103.

[0111] Reference Figure 1 By constructing the bottom walls on both sides of the first baffle 21 as inclined surfaces that gradually decrease in the direction away from the first baffle 21, the bottom part of the furnace body 1 is constructed in the shape of a "human", which facilitates the material discharge cavity 10.

[0112] like Figure 1 As shown, in the vertical direction, the height of the top of the first retaining wall 21 is higher than the height of the bottom of the second retaining wall 22, so that part of the slag layer 201 can be piled up between the first retaining wall 21 and the second retaining wall 22, and through the cooperation of the slag layer 201 in the reduction sulfidation zone 102 with the second retaining wall 22, a seal is formed between the reduction sulfidation zone 102 and the slag depletion zone 103.

[0113] like Figure 1As shown in some embodiments of this application, the furnace body 1 is provided with a slag discharge port 145, which is located on the side of the slag depletion zone 103 away from the second baffle wall 22, and is flush with the top of the first baffle wall 21. The slag discharge port 145 is used to discharge nickel slag from the slag depletion zone 103, facilitating the unified collection and processing of the reactants after smelting.

[0114] In some embodiments of this application, a first water jacket 211 may be embedded in the first baffle wall 21, which can cool down the first baffle wall 21 and prevent the temperature of the first baffle wall 21 from being too high; a second water jacket 221 may be embedded in the second baffle wall 22, which can cool down the second baffle wall 22 and prevent the temperature of the second baffle wall 22 from being too high.

[0115] In some embodiments of this application, the lower part of the first baffle wall 21 can be formed by refractory brick masonry, and the upper part of the first baffle wall 21 can be formed by a brick-inserted water jacket (i.e., the first water jacket 211); the second baffle wall 22 can be formed by a brick-inserted water jacket structure (i.e., the second water jacket 221), and the hot surfaces of the second water jacket 221 in the second baffle wall 22 near both sides of the molten pool are all made of "E"-shaped serrations, and refractory bricks are inlaid inside to protect the second water jacket 221.

[0116] like Figure 2 As shown, in some embodiments of this application, a third water jacket 23 is provided on the side wall of the furnace body 1, and the third water jacket 23 is arranged at least corresponding to the reduction sulfidation zone 102.

[0117] It is understandable that the reduction sulfidation zone 102 can be divided vertically from bottom to top into a melt storage zone 1021, a bubbling reaction zone 1022, and a gas flow zone 1023. Among them, the melt storage zone 1021 is the storage area corresponding to the melt layer (i.e., nickel matte), the bubbling reaction zone 1022 is the reaction area of ​​the slag layer 201, and the gas flow zone 1023 is the area for gas flow.

[0118] It should be noted that the “melt storage zone 1021, bubbling reaction zone 1022 and gas flow zone 1023” mentioned above are the areas of the smelting equipment 100 corresponding to the functions during the smelting process. The materials located in the reduction and sulfidation zone 102 (such as nickel matte and smelting slag) can be left to stand and layer to form the above-mentioned nickel matte and slag layer 201.

[0119] Reference Figure 2 The second feeding section 12 is located on the furnace body 1 at a position corresponding to the bubbling reaction zone 1022, and is used to add combustion materials to the slag layer 201; the third feeding section 13 is located on the furnace body 1 at a position corresponding to the melt storage zone 1021, and is used to add liquid sulfur to the melt layer.

[0120] Furthermore, the furnace body 1 can adopt a brick structure in the part forming the melt storage zone 1021, and a copper water jacket (i.e. the third water jacket 23 mentioned above) inlaid brick structure in the part forming the bubbling reaction zone 1022. The furnace body 1 can adopt a brick structure or a copper water jacket structure in the gas flow zone 1023.

[0121] Currently, in the preparation of low-grade nickel matte, the RKEF (Rotary Klin Electric Furnace) process, which involves using a rotary kiln and an electric furnace, can be used to produce ferronickel, which is then further sulfided to produce low-grade nickel matte. However, this process consumes a large amount of electricity, resulting in a high cost for producing low-grade nickel matte.

[0122] It is understandable that the method of melting the molten material 200 using the melting equipment 100 in this application is less costly. Compared with the above-mentioned preparation process, the melting equipment 100 in this application melts the molten material 200 through the furnace body 1, which can reduce the preparation cost of low-grade nickel matte while ensuring the efficiency and quality of low-grade nickel matte preparation.

[0123] In summary, the smelting equipment 100 according to the embodiments of this application has at least the following advantages:

[0124] (1) A first baffle 21 and a second baffle 22 are provided on the furnace body 1 to improve the controllability of the oxidizing atmosphere in the oxidizing melting zone 101 and the reducing atmosphere in the reducing sulfidation zone 102 of the smelting equipment 100.

[0125] (2) Combustible materials (such as oxygen-enriched air and pulverized coal) can be added to the cavity 10 through the first feeding section 11 and the second feeding section 12. The pulverized coal can be directly burned inside the smelting material 200 so as to supplement the heat of the smelting material 200 in the cavity 10 through the combustible materials, and can improve the utilization efficiency of the reducing agent in the reduction sulfidation zone 102.

[0126] (3) Liquid sulfur is added to the reduction and sulfidation zone 102 through the third feeding section 13 so that it can directly participate in the sulfidation reaction while stirring the melt with liquid sulfur.

[0127] (4) An electrode and a second feed port 152 are provided in the slag depletion zone 103, which can increase the temperature of the slag layer 201 in the slag depletion zone 103 and carry out a reduction reaction, thereby improving the fluidity of the slag layer 201 and increasing the nickel recovery rate.

[0128] (5) A first connecting port 18 is provided on the furnace body 1 so as to supply oxygen to the furnace body 1 through the first connecting port 18, so that the carbon monoxide gas in the flue gas in the furnace body 1 can be burned and generate heat. The heat can be transferred to the melt (i.e. the material in the reduction sulfidation zone 102) side under the drive of the gas supplied by the first connecting port 18.

[0129] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0130] In the description of this application, "first feature" and "second feature" may include one or more of the features.

[0131] In the description of this application, "multiple" means two or more.

[0132] In the description of this application, the first feature being "above" or "below" the second feature may include the first and second features being in direct contact, or the first and second features being in contact through another feature between them.

[0133] In the description of this application, the terms "above," "over," and "on top" for the first feature and the second feature include the first feature being directly above or diagonally above the second feature, or simply indicate that the first feature is at a higher horizontal level than the second feature.

[0134] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0135] Although embodiments of this application have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of this application, the scope of which is defined by the claims and their equivalents.

Claims

1. A smelting apparatus (100), characterized in that, include: Furnace body (1), the furnace body (1) having a cavity (10); A first baffle wall (21) and a second baffle wall (22) are arranged at intervals along a first direction in the cavity (10), with the first baffle wall (21) located on the bottom wall of the cavity (10) and the second baffle wall (22) located on the top wall of the cavity (10). The first baffle wall (21) and the second baffle wall (22) are separated in the cavity (10) to form an oxidation melting zone (101), a reduction sulfidation zone (102) and a slag depletion zone (103) arranged sequentially along the first direction. The oxidation melting zone (101) and the reduction sulfidation zone (102) are formed on both sides of the first baffle wall (21) in the first direction and are connected at the top. The reduction sulfidation zone (102) and the slag depletion zone (103) are formed on both sides of the second baffle wall (22) in the first direction and are connected at the bottom.

2. The smelting equipment (100) according to claim 1, characterized in that, The furnace body (1) is equipped with: The first feeding section (11) is connected to the oxidation melting zone (101) and is used to add combustible materials to the oxidation melting zone (101); The second feeding section (12) is connected to the reduction vulcanization zone (102) and is used to add combustible materials to the reduction vulcanization zone (102).

3. The smelting equipment (100) according to claim 2, characterized in that, The first feeding part (11) is connected to the oxidation melting zone (101) at a position not higher than the top of the first baffle (21); And / or, the second feeding part (12) is connected to the reduction vulcanization zone (102) at a position not higher than the top of the first retaining wall (21); And / or, in the vertical direction of the furnace body (1), the height position of the first feeding part (11) and the height position of the second feeding part (12) are the same.

4. The smelting equipment (100) according to claim 2, characterized in that, The furnace body (1) is also provided with a third feeding section (13), which is used to add a vulcanizing agent to the reduction vulcanization zone (102), and the communication position between the third feeding section (13) and the reduction vulcanization zone (102) is located below the communication position between the second feeding section (12) and the reduction vulcanization zone (102).

5. The smelting equipment (100) according to claim 2, characterized in that, The furnace body (1) is equipped with: A first discharge port (141) is connected to the oxidation melting zone (101), and the first discharge port (141) is located near the bottom wall of the oxidation melting zone (101). The second discharge port (142) is connected to the oxidation melting zone (101), and the connection position between the second discharge port (142) and the oxidation melting zone (101) is located above the connection position between the first discharge port (141) and the oxidation melting zone (101).

6. The smelting equipment (100) according to claim 5, characterized in that, The second discharge port (142) is positioned at a lower level than the position where the first feeding part (11) is positioned at the same level as the oxidation melting zone (101).

7. The smelting equipment (100) according to claim 1, characterized in that, The furnace body (1) is provided with a first feeding port (151), which is connected to the oxidation melting zone (101) and is used to add smelting materials (200) to the oxidation melting zone (101).

8. The smelting equipment (100) according to claim 1, characterized in that, The smelting equipment (100) further includes a flue section (16), which has a flue (161) communicating with the reduction sulfidation zone (102), and the flue (161) communicating with the reduction sulfidation zone (102) is located at one end of the reduction sulfidation zone (102) away from the oxidation melting zone (101).

9. The smelting equipment (100) according to claim 8, characterized in that, The cavity (10) is provided with a baffle (17), which is located near the connection between the flue (161) and the reduction vulcanization zone (102). In the first direction, the connection between the flue (161) and the reduction vulcanization zone (102) is located between the baffle (17) and the second baffle wall (22).

10. The smelting equipment (100) according to claim 9, characterized in that, The furnace body (1) is provided with a first communication port (18), which is connected to the reduction and vulcanization zone (102). In the first direction, the communication position between the first communication port (18) and the reduction and vulcanization zone (102) is located on the side of the baffle (17) away from the communication position between the flue (161) and the reduction and vulcanization zone (102). And / or, the exhaust section (16) is further provided with a second connection port (162), which is connected to the flue (161), and the second connection port (162) can be used to burn combustible materials in the flue (161).

11. The smelting equipment (100) according to claim 1, characterized in that, The cavity (10) is also provided with a second feeding port (152), which is connected to the slag depletion zone (103) and is used to add combustion materials to the slag depletion zone (103); And / or, the smelting equipment (100) further includes electrodes (3), at least a portion of which are located within the slag depletion zone (103).

12. The smelting equipment (100) according to claim 1, characterized in that, The cavity (10) is further provided with: The third discharge port (143) is connected to the slag depletion zone (103) and is located near the bottom wall of the slag depletion zone (103). The fourth discharge port (144) is connected to the slag depletion zone (103), and the connection position between the fourth discharge port (144) and the slag depletion zone (103) is located above the connection position between the third discharge port (143) and the slag depletion zone (103).

13. The smelting equipment (100) according to claim 1, characterized in that, The bottom wall of the cavity (10) includes a first bottom wall (191) and a second bottom wall (192) located on both sides of the first baffle wall (21) in the first direction; wherein, The first bottom wall (191) is the wall surface of the oxidation melting zone (101), and slopes downward from the first baffle (21) along the first direction toward the side away from the reduction sulfidation zone (102); The second bottom wall (192) is the wall surface of the reduction sulfidation zone (102) and the slag depletion zone (103), and slopes downward from the first retaining wall (21) along the first direction toward the side away from the oxidation melting zone (101).

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