Zinc pyrometallurgy smelting device

Abstract

The utility model discloses a zinc pyrometallurgy smelting device. The pyrometallurgy zinc smelting device comprises a furnace body, the furnace body is provided with an oxidation smelting cavity and a reduction smelting cavity, and the bottoms of the oxidation smelting cavity and the reduction smelting cavity are communicated; the zinc pyrometallurgy smelting device further comprises a first smoke outlet, a first metal discharging opening, a first nozzle, a second smoke outlet, a second metal discharging opening and a slag discharging opening which are formed in the furnace body. The first smoke outlet, the first metal discharging opening and the first nozzle all communicate with the oxidation smelting cavity. The first spray gun is connected with the first nozzle so as to spray oxygen into the oxidation smelting cavity; and the second smoke outlet, the second metal discharging opening and the slag discharging opening all communicate with the reduction smelting cavity, and after zinc concentrate is smelted in the oxidation smelting cavity and subjected to oxidation desulfurization treatment, slag generated by smelting in the oxidation smelting cavity flows into the reduction smelting cavity to be subjected to reduction treatment. According to the embodiment of the utility model, mineral aggregate can be directly fed into the furnace, the material preparation process is simplified, and the metal recovery rate is improved.

Description

Technical Field

[0001] This utility model belongs to the field of metal smelting technology, specifically relating to a pyrometallurgical zinc smelting apparatus. Background Technology

[0002] Among related technologies, hydrometallurgical zinc smelting has a long process, and the resulting leaching slag and iron slag are hazardous wastes that require harmless treatment. It also has high energy consumption and brings new pollution. Pyrometallurgical zinc smelting is mainly divided into blast furnace zinc smelting, vertical ladle zinc smelting, and electric furnace zinc smelting. The preparation process of the ore before entering the furnace is complicated, and the metal recovery rate is low. Utility Model Content

[0003] This utility model aims to at least partially solve one of the technical problems in the related art.

[0004] Therefore, embodiments of this utility model propose a pyrometallurgical zinc smelting apparatus that simplifies the material preparation process and improves the metal recovery rate.

[0005] The pyrometallurgical zinc smelting apparatus of this embodiment includes:

[0006] The furnace body has an oxidation melting chamber and a reduction melting chamber, and the bottoms of the oxidation melting chamber and the reduction melting chamber are connected.

[0007] The first flue gas outlet, the first metal discharge outlet, and the first nozzle are provided on the furnace body, and the first flue gas outlet, the first metal discharge outlet, and the first nozzle are all connected to the oxidation melting chamber;

[0008] A first spray gun, connected to a first nozzle, is used to spray oxygen into the oxidation melting chamber;

[0009] The second flue gas outlet, the second metal discharge outlet, and the slag discharge outlet are provided on the furnace body. The second flue gas outlet, the second metal discharge outlet, and the slag discharge outlet are all connected to the reduction smelting chamber. After the zinc concentrate is smelted and desulfurized in the oxidation smelting chamber, the slag generated in the oxidation smelting chamber flows into the reduction smelting chamber for reduction treatment.

[0010] In the embodiments of this utility model, the ore can be directly fed into the furnace, simplifying the material preparation process and improving the metal recovery rate.

[0011] In some embodiments, the reduction smelting chamber includes an electrothermal reduction section and a jet blowing section. The slag flowing into the reduction smelting chamber is reduced sequentially through the electrothermal reduction section and the jet blowing section. The second metal discharge port and the slag discharge port are located near the jet blowing section.

[0012] In some embodiments, the system further includes an electrode and a second spray gun. The electrode is disposed on the furnace body, and a portion of the electrode is located within the electrothermal reduction section. The furnace body also has a reducing agent inlet and a second nozzle. The reducing agent inlet is correspondingly connected to the electrothermal reduction section to feed a reducing agent into the electrothermal reduction section. The second nozzle is correspondingly connected to the jet blowing section. The second spray gun is connected to the second nozzle to feed carbonaceous reducing agent and oxygen into the jet blowing section.

[0013] In some embodiments, the amount of oxygen injected into the jet spray section through the second spray gun is 0.1 to 0.5 of the total amount of oxygen required for the complete combustion of the carbonaceous reducing agent.

[0014] In some embodiments, the number of the second spray guns is multiple, and the multiple second spray guns are arranged at circumferential intervals along the jet blowing section;

[0015] And / or, the second metal discharge port is located below the second spray gun, and the slag discharge port is located above the second spray gun;

[0016] And / or, the number of electrodes is multiple, the multiple electrodes are arranged in a rectangular array, the number of reducing agent inlets is multiple, and the multiple reducing agent inlets are distributed at intervals on the furnace body.

[0017] In some embodiments, the electrothermal reduction section and the jet blowing section are arranged along a first direction, and the length a of the electrothermal reduction section in the first direction and the length b of the jet blowing section in the first direction satisfy: a > 2b.

[0018] In some embodiments, the heat replenishment ratio of the electrothermal reduction section to the jet blowing section is 2:1 to 5:1.

[0019] In some embodiments, the oxidation melting chamber has a first operating condition and a second operating condition;

[0020] Under the first operating condition, the temperature inside the oxidation melting chamber is 1100℃ to 1300℃, and the oxygen-to-material ratio inside the oxidation melting chamber is 100 Nm. 3 / t to 250Nm 3 / t;

[0021] Under the second operating condition, the temperature inside the oxidation melting chamber is 1350℃ to 1550℃, and the oxygen-to-material ratio inside the oxidation melting chamber is 300 Nm. 3 / t to 500Nm 3 / t.

[0022] In some embodiments, the furnace body further includes a ore feed inlet connected to the oxidation smelting chamber to deliver zinc concentrate and flux into the oxidation smelting chamber.

[0023] In some embodiments, the first metal discharge port is a siphon. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a pyrometallurgical zinc smelting apparatus according to an embodiment of this utility model.

[0025] Figure 2 yes Figure 1 A schematic diagram of the structure along direction A.

[0026] Figure label:

[0027] 100. Pyrometallurgical zinc smelting equipment;

[0028] 1. Furnace body;

[0029] 2. Oxidation smelting chamber; 21. Ore feed inlet;

[0030] 3. Reduction melting chamber; 31. Electrothermal reduction section; 32. Jet blowing section; 33. Reducing agent inlet; 34. Electrode;

[0031] 41. First metal discharge port; 42. First flue gas outlet; 43. First nozzle; 44. Second metal discharge port; 45. Slag discharge port; 46. Second flue gas outlet; 47. Second nozzle. Detailed Implementation

[0032] The embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, and should not be construed as limiting the present invention.

[0033] like Figure 1 and Figure 2 As shown, the pyrometallurgical zinc smelting apparatus 100 of this utility model includes a furnace body 1, which has an oxidation smelting chamber 2 and a reduction smelting chamber 3, and the bottoms of the oxidation smelting chamber 2 and the reduction smelting chamber 3 are connected.

[0034] Zinc concentrate can undergo oxidation and desulfurization in the oxidation smelting chamber 2 and reduction in the reduction smelting chamber 3, thereby achieving the smelting of zinc concentrate and the recovery of valuable metals in different process stages, improving smelting efficiency and metal recovery rate. Furthermore, in this embodiment of the invention, the ore does not require a complicated material preparation process before entering the furnace; the ore and flux can be directly mixed and added into the furnace body 1.

[0035] The pyrometallurgical zinc smelting apparatus 100 also includes a first flue gas outlet 42, a first metal discharge outlet 41, and a first nozzle 43 disposed on the furnace body 1. The first flue gas outlet 42, the first metal discharge outlet 41, and the first nozzle 43 are all connected to the oxidation smelting chamber 2.

[0036] A first spray gun is provided at the first nozzle 43. The first spray gun is connected to the first nozzle 43 to spray oxygen into the oxidation melting chamber 2. By controlling the temperature in the oxidation melting chamber 2 and adjusting the amount of oxygen injected into the oxidation melting chamber 2 from the first spray gun, the working conditions in the oxidation melting chamber 2 can be adjusted, so that the ore is oxidized under different working conditions, thereby realizing the recovery of valuable metals at different stages.

[0037] The pyrometallurgical zinc smelting apparatus 100 also includes a second flue gas outlet 46, a second metal discharge outlet 44, and a slag discharge outlet 45 installed on the furnace body 1. The second flue gas outlet 46, the second metal discharge outlet 44, and the slag discharge outlet 45 are all connected to the reduction smelting chamber 3. After the zinc concentrate is smelted and desulfurized in the oxidation smelting chamber 2, the slag generated in the oxidation smelting chamber 2 flows into the reduction smelting chamber 3 for reduction treatment.

[0038] The smelting apparatus provided in this embodiment of the invention enables short-process pyrometallurgical zinc smelting through oxidative desulfurization in the oxidative smelting chamber 2 and high-temperature reduction in the reduction smelting chamber 3. Zinc concentrate requires no complex preparation or treatment; the zinc concentrate, flux, and oxygen are directly fed into the oxidative smelting chamber 2 for oxidative desulfurization, avoiding pre-furnace treatment. In the oxidative smelting chamber 2 of this embodiment, the zinc concentrate can be smelted into copper matte under low-temperature, low-oxygen potential conditions, thereby capturing most of the copper, gold, silver, and other precious metals. The copper matte deposits at the bottom of the molten pool and is discharged through the first metal discharge port 41. Then, under high-temperature, high-oxygen potential conditions, thorough desulfurization is carried out, producing cadmium and lead-containing dust, which is discharged with the flue gas from the first exhaust port 42. The slag in the oxidation melting chamber 2 flows into the reduction melting chamber 3. The slag contains zinc and the remaining valuable metals. The slag can be reduced at high temperature in the reduction melting chamber 3 to produce pig iron. The remaining small amount of valuable metals such as copper, gold, and silver are recovered in the pig iron. The pig iron is discharged from the second metal discharge port 44. The remaining lead and cadmium, as well as indium, germanium, etc., are reduced to form steam and discharged from the second flue gas port 46 along with zinc steam.

[0039] The embodiments of this utility model can simplify the material preparation process, and improve the metal recovery rate by carrying out smelting and recovery of valuable metals through multiple stages of oxidation and reduction treatment.

[0040] In this embodiment of the invention, the first spray gun injects oxygen or oxygen-enriched air into the oxidation melting chamber 2 to regulate the oxygen-to-material ratio in the oxidation melting chamber 2 and ensure the oxidation and desulfurization treatment at different stages of melting.

[0041] Optionally, there may be multiple first spray guns, arranged side by side at intervals. The gas sprayed by the first spray guns can also thoroughly stir the molten slag, promoting a complete chemical reaction within the oxidation melting chamber 2.

[0042] Furthermore, the first spray gun is positioned vertically higher than the first metal discharge port 41 and the connection port between the oxidation melting chamber 2 and the reduction melting chamber 3, so as to avoid causing significant disturbance to the copper matte deposited at the bottom of the oxidation melting chamber 2 and facilitate the smooth discharge of the copper matte.

[0043] In some embodiments, the reduction melting chamber 3 includes an electrothermal reduction section 31 and a jet blowing section 32. The slag flowing into the reduction melting chamber 3 is reduced by passing through the electrothermal reduction section 31 and the jet blowing section 32 in sequence. The second metal discharge port 44 and the slag discharge port 45 are located near the jet blowing section 32.

[0044] In this embodiment of the invention, the reduction is carried out in two stages: the electrothermal reduction section 31 and the jet blowing section 32. This achieves deep reduction of the slag. The slag flowing from the oxidation melting chamber 2 into the reduction melting chamber 3 is first reduced by the electrothermal reduction section 31, and then deeply reduced by the jet blowing section 32. The remaining small amount of valuable metals such as copper, gold, and silver are discharged with the pig iron through the second metal discharge port 44, and the slag is discharged through the slag discharge port 45. The remaining lead, cadmium, and valuable metals such as indium and germanium are discharged with the high zinc steam through the second flue gas port 46.

[0045] This embodiment of the invention improves smelting efficiency and metal recovery rate by segmenting the reduction smelting chamber 3 and sequentially reducing the slag. It also enables more effective control of the reduction process, realizing a short-process pyrometallurgical zinc smelting process.

[0046] In some embodiments, the furnace body 1 further includes an electrode 34 and a second spray gun. The electrode 34 is disposed on the furnace body 1, and a portion of the electrode 34 is located within the electrothermal reduction section 31. The furnace body 1 also has a reducing agent inlet 33 and a second nozzle 47. The reducing agent inlet 33 is correspondingly connected to the electrothermal reduction section 31 to feed a reducing agent into the electrothermal reduction section 31. The second nozzle 47 is correspondingly connected to the jet blowing section 32. The second spray gun is connected to the second nozzle 47 to feed carbonaceous reducing agent and oxygen into the jet blowing section 32.

[0047] The electrothermal reduction section 31 is supplemented with heat by electrode 34. The reducing agent is added into the electrothermal reduction section 31 through the reducing agent inlet 33. The second spray gun is used to feed carbonaceous reducing agent and oxygen into the jet blowing section 32. On the one hand, it can provide heat for deep reduction, and on the other hand, it can provide reducing agent for the reduction process.

[0048] Furthermore, the amount of oxygen injected into the jet spray section 32 through the second spray gun is 0.1 to 0.5 of the total amount of oxygen required for the complete combustion of the carbonaceous reducing agent.

[0049] This invention enables the carbonaceous reducing agent to partially burn and replenish heat, while the unburned portion can be used as a reducing agent to perform high-temperature deep reduction treatment on the slag, thereby improving the efficiency and effectiveness of smelting.

[0050] Electrode 34 is made of graphite and is also equipped with an electrode 34 lifting device for driving electrode 34 to rise and fall in the vertical direction.

[0051] Optionally, the amount of oxygen injected into the jet spraying section 32 through the second spray gun is 0.1, 0.2, 0.33, 0.36, 0.41, 0.44, 0.485, or 0.5 of the total amount of oxygen required for the complete combustion of the carbonaceous reducing agent. When the amount of oxygen injected into the jet spraying section 32 through the second spray gun is too small and less than 0.1 times the total amount of oxygen required for the complete combustion of the carbonaceous reducing agent, it is difficult to achieve the ideal heat replenishment effect and the deep reduction effect of the jet spraying section 32 cannot be exerted. When the amount of oxygen injected into the jet spraying section 32 through the second spray gun is too large and greater than 0.5 times the total amount of oxygen required for the complete combustion of the carbonaceous reducing agent, it will lead to heat waste, increase heat consumption, and reduce the amount of reducing agent, which is not conducive to the deep reduction reaction.

[0052] In some embodiments, there are multiple second spray guns, which are arranged at circumferential intervals along the jet spray section 32.

[0053] The jet blowing section 32 has four sides. One side of the jet blowing section 32 is connected to the electrothermal reduction section 31. The other three sides of the jet blowing section 32 are equipped with multiple second spray guns. While spraying carbonaceous reducing agent and oxygen, the second spray guns can stir the molten slag to achieve full contact between the carbonaceous reducing agent and the molten slag and high-temperature reduction.

[0054] In some embodiments, the second metal discharge port 44 is located below the second spray gun, and the slag discharge port 45 is located above the second spray gun. The second metal discharge port 44 and the slag discharge port 45 are positioned relative to the second spray gun in the height direction to facilitate the recovery of valuable metals and the discharge of waste slag, thereby improving the metal recovery rate and the smelting effect.

[0055] In this embodiment of the invention, there are multiple electrodes 34 arranged in a rectangular array, and multiple reducing agent inlets 33 are distributed at intervals on the furnace body 1.

[0056] The arrangement of multiple electrodes 34 enables more uniform and consistent reheating in the reduction smelting zone, and the multiple reducing agent inlets 33 enable more uniform distribution of the reducing agent and full contact with the molten slag, thereby improving the reduction effect.

[0057] In some embodiments, the electrothermal reduction section 31 and the jet blowing section 32 are arranged along a first direction, and the length a of the electrothermal reduction section 31 in the first direction and the length b of the jet blowing section 32 in the first direction satisfy: a > 2b.

[0058] In this embodiment of the invention, by further optimizing the space of the reduction melting chamber 3, the reduction treatment effect of the slag in this area can be improved, enabling the slag to be fully and deeply reduced, thereby obtaining high-quality products.

[0059] The cross-section of the reduction melting chamber 3 is approximately rectangular, and the first direction is the length direction of the cross-section of the reduction melting chamber 3.

[0060] For example, the length of the reduction melting chamber 3 in the first direction is L, the length a of the electrothermal reduction section 31 in the first direction is 3 / 4L, and the length b of the jet blowing section 32 in the first direction is 1 / 4L.

[0061] Alternatively, the length a of the electrothermal reduction section 31 in the first direction is 5 / 7L, and the length b of the jet blowing section 32 in the first direction is 2 / 7L.

[0062] When a≤2b, the reduction treatment effect of slag in reduction melting chamber 3 is poor, the reduction treatment time of slag in electrothermal reduction section 31 is relatively short, and the reduction treatment time in jet blowing section 32 is relatively long, which affects the melting effect of slag and the quality of products.

[0063] In some embodiments, the heat replenishment ratio of the electrothermal reduction section 31 to the jet blowing section 32 is 2:1 to 5:1.

[0064] The heat replenishment ratio between the electrothermal reduction section 31 and the jet blowing section 32 can be 2:1, 3:1, 3.4:1, 4.2:1, 4.6:1, or 5:1. By adjusting the heat replenishment ratio between the electrothermal reduction section 31 and the jet blowing section 32, the temperature and degree of reduction treatment of the molten slag in the electrothermal reduction section 31 and the jet blowing section 32 can be optimized, thereby optimizing the reduction process and improving the smelting effect.

[0065] Furthermore, the volume ratio of CO to CO2 in the reduction melting chamber is between 20:1 and 35:1. Controlling the volume ratio of CO to CO2 in the reduction melting chamber within a reasonable range optimizes the reduction process, ensures production efficiency and improves product quality, and helps to increase the direct recovery rate and recycling rate of metals.

[0066] In some embodiments, the oxidation melting chamber has a first operating condition and a second operating condition;

[0067] Under the first operating condition, the temperature inside the oxidation melting chamber is 1100℃ to 1300℃, and the oxygen-to-material ratio inside the oxidation melting chamber is 100 Nm. 3 / t to 250Nm 3 / t.

[0068] Under the second operating condition, the temperature inside the oxidation melting chamber is 1350℃ to 1550℃, and the oxygen-to-material ratio inside the oxidation melting chamber is 300 Nm. 3 / t to 500Nm 3 / t.

[0069] It should be understood that, under the first operating condition, the oxidative smelting chamber operates under low-temperature and low-oxygen-potential conditions. The zinc concentrate undergoes oxidative desulfurization under these conditions, yielding a high-zinc slag containing sulfur and copper matte containing most of the copper, gold, silver, and other precious metals, thus achieving the recovery of most of these metals. Under the second operating condition, the oxidative smelting chamber operates under high-temperature and high-oxygen-potential conditions. The high-zinc slag is further desulfurized under these conditions, forming a low-sulfur, high-zinc slag and high-cadmium dust containing cadmium and lead, thus achieving the recovery of cadmium and lead.

[0070] Under low temperature and low oxygen potential conditions, the sulfur-containing high zinc slag formed contains 2% to 5% S, and the copper matte formed contains 10% to 30% Cu. 70% to 80% Cu, 80% to 90% Au and 80% to 90% Ag are enriched in the copper matte for recovery.

[0071] Under high temperature and high oxygen potential conditions, the low-sulfur and high-zinc slag contains less than 1% S and 40% to 60% Zn, while the high-cadmium flue dust contains more than 12% Cd.

[0072] The oxygen potential in this embodiment of the invention is expressed as the oxygen-to-material ratio, which is the ratio of the volume of oxygen to the mass of the ore.

[0073] Furthermore, under the first operating condition, the temperature inside the oxidation melting chamber is 1100℃, 1130℃, 1175℃, 1200℃, 1265℃, or 1300℃, and the oxygen-to-material ratio inside the oxidation melting chamber is 100 Nm. 3 / t, 120Nm 3 / t、142Nm 3 / t、155Nm 3 / t、195Nm 3 / t、230Nm 3 / t or 250Nm 3 / t.

[0074] Under the second operating condition, the temperature inside the oxidation melting chamber is 1350℃, 1380℃, 1395℃, 1426℃, 1448℃, 1496℃, 1525℃, or 1550℃, and the oxygen-to-material ratio inside the oxidation melting chamber is 300 Nm. 3 / t、320Nm 3 / t、342Nm 3 / t、355Nm3 / t、395Nm 3 / t、430Nm 3 / t、495Nm 3 / t or 500Nm 3 / t.

[0075] By rationally controlling the oxygen-to-material ratio at different stages under two different operating conditions, the stability of chemical reactions in different sections of the furnace can be ensured, enabling precise control and optimization of the smelting process, reducing energy consumption and costs, and improving metal recovery rate.

[0076] In some embodiments, the furnace body 1 further has a ore feed inlet 21, which is connected to the oxidation melting chamber 2 to deliver zinc concentrate and flux into the oxidation melting chamber 2.

[0077] After the zinc concentrate and flux are thoroughly mixed by a mixing device, they are conveyed into the oxidation smelting chamber by a conveyor or other feeding device to complete the feeding process. The mixing device can be a stirring drum. The zinc concentrate and flux are added to the stirring drum and mixed by stirring, which reduces the difficulty of material preparation and eliminates the need for other pre-furnace treatment.

[0078] In some embodiments, the first metal discharge port is a siphon. Under low temperature and low oxygen potential conditions, the copper matte formed in the oxidation smelting chamber is deposited to the bottom of the molten pool and discharged through the siphon, which improves the quality of the copper matte, optimizes the smelting process, and avoids slag outflow.

[0079] The refined zinc in this embodiment contains >99.995% Zn.

[0080] Meanwhile, in this embodiment of the invention, the copper matte discharged from the first metal discharge port, the high-cadmium flue gas discharged from the first exhaust port, the molten iron discharged from the second metal discharge port, and the zinc vapor containing valuable metals discharged from the second exhaust port can be separated into corresponding valuable metals after being treated by different metal separation processes, and efficient recovery can be achieved. Among them, the recovery rate of zinc can reach 97% to 98%, the recovery rate of lead can reach 97% to 98%, the recovery rate of copper can reach 90% to 95%, the recovery rate of cadmium can reach 90% to 95%, the recovery rate of gold can reach 90% to 95%, the recovery rate of silver can reach 90% to 95%, the recovery rate of indium can reach 90% to 95%, and the recovery rate of germanium can reach 90% to 95%.

[0081] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0082] In this utility model, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0083] In this utility model, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this utility model. 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. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0084] Although embodiments of the present invention have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present invention.

Claims

1. A pyrometallurgical zinc smelting apparatus, characterized in that, include: The furnace body has an oxidation melting chamber and a reduction melting chamber, and the bottoms of the oxidation melting chamber and the reduction melting chamber are connected. The first flue gas outlet, the first metal discharge outlet, and the first nozzle are provided on the furnace body, and the first flue gas outlet, the first metal discharge outlet, and the first nozzle are all connected to the oxidation melting chamber; A first spray gun, connected to a first nozzle, is used to spray oxygen into the oxidation melting chamber; The second flue gas outlet, the second metal discharge outlet, and the slag discharge outlet are provided on the furnace body. The second flue gas outlet, the second metal discharge outlet, and the slag discharge outlet are all connected to the reduction smelting chamber. After the zinc concentrate is smelted and desulfurized in the oxidation smelting chamber, the slag generated in the oxidation smelting chamber flows into the reduction smelting chamber for reduction treatment.

2. The pyrometallurgical zinc smelting apparatus according to claim 1, characterized in that, The reduction smelting chamber includes an electrothermal reduction section and a jet blowing section. The slag flowing into the reduction smelting chamber is reduced sequentially through the electrothermal reduction section and the jet blowing section. The second metal discharge port and the slag discharge port are located near the jet blowing section.

3. The pyrometallurgical zinc smelting apparatus according to claim 2, characterized in that, It also includes an electrode and a second spray gun. The electrode is disposed on the furnace body, and a portion of the electrode is located within the electrothermal reduction section. The furnace body also has a reducing agent inlet and a second nozzle. The reducing agent inlet is correspondingly connected to the electrothermal reduction section to feed the reducing agent into the electrothermal reduction section. The second nozzle is correspondingly connected to the jet blowing section. The second spray gun is connected to the second nozzle to feed carbonaceous reducing agent and oxygen into the jet blowing section.

4. The pyrometallurgical zinc smelting apparatus according to claim 3, characterized in that, The amount of oxygen injected into the jet section through the second spray gun is 0.1 to 0.5 of the total amount of oxygen required for the complete combustion of the carbonaceous reducing agent.

5. The pyrometallurgical zinc smelting apparatus according to claim 3, characterized in that, The number of the second spray guns is multiple, and the multiple second spray guns are arranged at circumferential intervals along the jet blowing section; And / or, the second metal discharge port is located below the second spray gun, and the slag discharge port is located above the second spray gun; And / or, the number of electrodes is multiple, the multiple electrodes are arranged in a rectangular array, the number of reducing agent inlets is multiple, and the multiple reducing agent inlets are distributed at intervals on the furnace body.

6. The pyrometallurgical zinc smelting apparatus according to claim 2, characterized in that, The electrothermal reduction section and the jet blowing section are arranged along a first direction, and the length a of the electrothermal reduction section in the first direction and the length b of the jet blowing section in the first direction satisfy: a > 2b.

7. The pyrometallurgical zinc smelting apparatus according to claim 6, characterized in that, The heat replenishment ratio between the electrothermal reduction section and the jet blowing section is 2:1 to 5:

1.

8. The pyrometallurgical zinc smelting apparatus according to claim 1, characterized in that, The oxidation melting chamber has a first operating condition and a second operating condition; Under the first operating condition, the temperature inside the oxidation melting chamber is 1100℃ to 1300℃, and the oxygen-to-material ratio inside the oxidation melting chamber is 100 Nm. 3 / t to 250Nm 3 / t; Under the second operating condition, the temperature inside the oxidation melting chamber is 1350℃ to 1550℃, and the oxygen-to-material ratio inside the oxidation melting chamber is 300 Nm. 3 / t to 500Nm 3 / t.

9. The pyrometallurgical zinc smelting apparatus according to claim 1, characterized in that, The furnace body also has a ore feed inlet, which is connected to the oxidation smelting chamber to deliver zinc concentrate and flux into the oxidation smelting chamber.

10. The pyrometallurgical zinc smelting apparatus according to claim 1, characterized in that, The first metal discharge port is a siphon port.

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