Feeding method and smelting device for smelting anode slime

Abstract

The invention discloses a feeding method and a smelting device for smelting anode slime, the feeding method comprises the steps that wet materials are added into a smelting furnace, and the wet materials comprise at least one of sediment mud of a flue gas treatment system, secondary sediment selenium and replacement silver powder; and dry materials are added into the smelting furnace in batches and smelted, wherein the dry materials comprise copper-removed anode slime and converting slag. According to the charging method for smelting the anode slime, the recycling rate of precious metal can be increased, meanwhile, environmental pollution is reduced, and the requirement for sustainable development is met.

Description

Technical Field

[0001] The present application relates to the field of smelting, and in particular to a feeding method and a smelting device for smelting anode mud. Background Art

[0002] In the relevant technology, anode mud is a solid by-product produced during the electrolytic refining process, which contains precious metals, base metals, semiconductor elements, etc. Its treatment process is complicated. Traditional treatment methods include pyroelectrolytic treatment, wet treatment and combined treatment of metallurgy. In recent years, with the development of science and technology, new feeding methods and technologies have emerged continuously, but the recovery rate of precious metals is still difficult to meet the demand, causing pollution to the environment. Summary of the invention

[0003] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, one purpose of the present application is to propose a feeding method for smelting anode mud, which can improve the recovery rate of precious metals while reducing environmental pollution and meet the needs of sustainable development.

[0004] The present application also proposes a smelting device for anode mud.

[0005] The feeding method for smelting anode mud according to the embodiment of the present application includes: adding wet material into a smelting furnace, wherein the wet material includes at least one of precipitated mud from a flue gas treatment system, secondary precipitated selenium, and replacement silver powder; adding dry material into the smelting furnace in batches and smelting, wherein the dry material includes decopperized anode mud and blowing slag.

[0006] According to the feeding method for smelting anode mud in the embodiment of the present application, the feeding method adopts a method of feeding in batches and melting in steps, that is, wet material is first added to the smelting furnace, and then dry material is added to the smelting furnace, and the wet material and the dry material are melted separately, so as to extract heavy metals in the anode mud. Compared with the prior art, the feeding method has a compact process flow, shortens the production cycle, improves production efficiency, reduces environmental pollution, and meets the needs of sustainable development.

[0007] In some embodiments of the present application, adding wet material into the smelting furnace further includes: steaming the wet material in the smelting furnace while the smelting furnace maintains a first speed n1; smelting the steamed wet material in the smelting furnace while the smelting furnace maintains a second speed n2 for a first preset time T1.

[0008] In some embodiments of the present application, the feeding method further includes: melting the wet material in the melting furnace and the melting furnace maintains a third rotation speed n3 for a second preset time T2.

[0009] In some embodiments of the present application, adding dry materials into the smelting furnace in batches and smelting also includes: adding the first batch of dry materials into the smelting furnace; steaming the first batch of dry materials in the smelting furnace and maintaining the smelting furnace at a first speed n1; melting the first batch of dry materials after steaming in the smelting furnace and maintaining the smelting furnace at a second speed n2 for a first preset time T1; melting the first batch of dry materials in the smelting furnace and maintaining the smelting furnace at a third speed n3 for a second preset time T2.

[0010] In some embodiments of the present application, adding dry materials into the smelting furnace in batches and performing smelting further includes: extracting the slag in the smelting furnace and detecting the current content of silver in the slag; if the current content of silver in the slag is greater than a preset content, continuing smelting; if the current content of silver in the slag is less than the preset content, performing slag discharge and adding a second batch of dry materials into the smelting furnace.

[0011] In some embodiments of the present application, the first speed satisfies: 0.5r / m≤n1≤1r / m, the second speed n2 satisfies: 0.8r / m≤n1≤1.2r / m, and the third speed satisfies: 8r / m≤n3≤12r / m; the first preset time T1 satisfies: 10m≤T1≤15m, and the second preset time T2 satisfies: 15m≤T2≤25m.

[0012] A smelting device for anode mud according to an embodiment of the present application includes: a smelting furnace, which is rotatably arranged on a base and has a smelting chamber formed therein, and a feeding port connected to the smelting chamber is formed on the smelting furnace; a first feeding device, which is formed with a first feeding port that can be selectively connected to the feeding port, and the first feeding device is suitable for adding wet material or blowing slag into the smelting chamber through the first feeding port; a second feeding device, which is formed with a second feeding port that can be selectively connected to the feeding port, and the second feeding device is suitable for adding decoppered anode mud in dry material into the smelting chamber through the second feeding port.

[0013] According to the smelting device for anode mud in the embodiment of the present application, the smelting device has a smelting furnace, a first feeding device and a second feeding device. The smelting furnace can be rotated to correspond to the first feeding device or the second feeding device. The first feeding device and the second feeding device can respectively add wet material and dry material to the smelting furnace. In the actual feeding process, the feeding method of first adding wet material to the smelting furnace and then adding dry material to the smelting furnace can be met, and the wet material and the dry material are melted separately to extract heavy metals in the anode mud. Compared with the prior art, the smelting device can be used for the above-mentioned feeding method, the process flow is compact, the production cycle is shortened, the production efficiency is improved, the environmental pollution is reduced, and the needs of sustainable development are met.

[0014] In some embodiments of the present application, the first feeding device includes: a boat-shaped feeder, a feeding port is formed at one end of the boat-shaped feeder, a first feeding port is formed at the other end of the boat-shaped feeder, and a connecting end is formed at the top of the boat-shaped feeder; a crane is connected to the connecting end and can selectively move in the height direction to drive the boat-shaped feeder to move.

[0015] In some embodiments of the present application, the second feeding device includes: a material conveying device, the material conveying device having a first containing bin, the first containing bin is suitable for containing dry decopperized anode mud and has a first outlet; a flux conveying device, the flux conveying device having a flux bin, the flux bin is suitable for containing flux and has a second outlet; a mixing device, the mixing device having a mixing chamber, and the mixing chamber is respectively connected to the first outlet and the second outlet, and the mixing chamber is suitable for mixing the dry decopperized anode mud and flux to form dry material.

[0016] In some embodiments of the present application, the material conveying device further has a second containing bin, which is suitable for containing wet decopperized anode mud. A dryer is arranged between the second containing bin and the first containing bin, and the inlet end of the dryer is connected to the outlet end of the second containing bin, and the outlet end of the dryer is connected to the inlet end of the first containing bin.

[0017] In some embodiments of the present application, the flux bin is configured to be a plurality of flux bins arranged in parallel, and the outlet ends of the plurality of flux bins are configured to be the second outlet.

[0018] In some embodiments of the present application, the mixing device has the second feeding port communicated with the mixing chamber, and a feeding valve is provided between the second feeding port and the feeding port.

[0019] In some embodiments of the present application, the smelting furnace is provided with a combustion lance and a blowing lance which are connected to the smelting chamber.

[0020] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The above and / or additional aspects and advantages of the present application will become apparent and easily understood from the description of the embodiments in conjunction with the following drawings, in which:

[0022] Figure 1 is a flow chart of a feeding method for smelting anode mud according to an embodiment of the present application;

[0023] Figure 2is another flow chart of a feeding method for smelting anode mud according to an embodiment of the present application;

[0024] Figure 3 is another flow chart of a feeding method for smelting anode mud according to an embodiment of the present application;

[0025] Figure 4 is a schematic structural diagram of a smelting device for anode mud according to an embodiment of the present application;

[0026] Figure 5 yes Figure 4 The structural diagram of the material conveying device;

[0027] Figure 6 yes Figure 4 A schematic diagram of the structure of the intermediate flux conveying device;

[0028] Figure 7 yes Figure 4 A schematic structural diagram of the first feeding device;

[0029] Figure 8 yes Figure 4 Schematic diagram of the structure of the mixing device and the smelting furnace.

[0030] Reference numerals:

[0031] 10. Smelting device;

[0032] 11. Smelting furnace; 111. Smelting chamber; 112. Feeding port; 113. Combustion spray gun; 114. Blowing spray gun;

[0033] 12. first feeding device; 121. boat-shaped feeder; 1211. feeding port; 1212. first feeding port;

[0034] 1213, connecting end; 122, crane; 1221, hook; 13, second feeding device;

[0035] 131. Material conveying device; 1311. First containing bin; 1312. First outlet;

[0036] 1313. second containing bin; 1314. dryer; 1315. first conveyor;

[0037] 1316. Scraper conveyor; 1317. Elevator;

[0038] 1318, second conveyor; 132, flux conveying device; 1321, flux bin; 1322, second outlet;

[0039] 133, mixing device; 1331, mixing chamber; 1332, second feeding port; 1333, feeding valve;

[0040] 14. Warehouse scale; 15. Base. DETAILED DESCRIPTION

[0041] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0042] Reference below Figure 1-Figure 3 A feeding method for smelting anode mud according to an embodiment of the present application is described, the feeding method comprising: adding wet material into a smelting furnace, the wet material comprising at least one of precipitated mud from a flue gas treatment system, secondary precipitated selenium, and replacement silver powder; adding dry material into the smelting furnace in batches and smelting, the dry material comprising decopperized anode mud and blowing slag.

[0043] At present, anode mud is a solid by-product produced during the electrolytic refining process. It contains precious metals, base metals, semiconductor elements, etc. Its treatment process is complicated. Traditional treatment methods include pyroelectrolytic treatment, wet treatment and combined treatment of metallurgy. In recent years, with the development of science and technology, new feeding methods and technologies have emerged continuously, but the recovery rate of precious metals is still difficult to meet the demand, causing pollution to the environment.

[0044] like Figure 1 As shown, specifically, the feeding method includes: S1, adding wet material to the smelting furnace, the wet material includes at least one of the sludge in the flue gas treatment system, secondary precipitated selenium, and replacement silver powder. The wet material can be added to the smelting furnace through a feeding device. In actual operation, the wet material can be divided into multiple batches and added to the smelting furnace in batches. Specifically, the wet material can be divided into 4 batches. The use of multiple batches of feeding can make the distribution more uniform and the smelting effect better. The wet material can include at least one of the sludge in the flue gas treatment system, secondary precipitated selenium, and replacement silver powder. The feeding time of the wet material should be less than 3 minutes to prevent a large amount of flue gas in the smelting furnace from entering the working environment.

[0045] S2. Add dry materials to the smelting furnace in batches and smelt them. The dry materials include copper-removed anode mud and blowing slag. The blowing slag can be the slag after blowing. The dry materials can be added to the smelting furnace through a feeding device, and the dry materials can be added in batches. For example, the dry materials can be added to the smelting furnace in two batches, and each batch of dry materials is smelted separately. Each batch of dry materials can also be added to the smelting furnace in multiple small batches. The copper-removed anode mud needs to be mixed with a flux. The flux can include at least one of coke powder, sodium carbonate, silicon dioxide, lead or lead oxide.

[0046] In short, the feeding method of the embodiment of the present application adopts a method of feeding in batches and melting in steps, that is, wet material is first added to the smelting furnace, and then dry material is added to the smelting furnace, and the wet material and dry material are melted separately to extract heavy metals in the anode mud. Compared with the existing technology, this feeding method has a compact process flow, shortens the production cycle, improves production efficiency, reduces environmental pollution, and meets the needs of sustainable development.

[0047] like Figure 2 As shown, in some embodiments of the present application, adding wet material into the smelting furnace further includes: S11, steaming the wet material in the smelting furnace and maintaining the first speed n1 of the smelting furnace. Before steaming the wet material in the smelting furnace, the temperature of the smelting furnace of the hole needs to be preheated to 1000°C, and then the wet material is added to the smelting furnace and the smelting furnace is tilted to the operating position for steaming. Specifically, a combustion spray gun can be used to steam the wet material in the smelting furnace and remove the moisture in the wet material to improve the reaction speed and efficiency. At this time, the smelting furnace can maintain the first speed n1, and the first speed can satisfy the relationship: 0.5r / m≤n1≤1r / m, that is, the first speed can be any value between 0.5r / m and 1r / m, for example, the first speed can be but not limited to 0.5r / m, 0.7r / m, 0.9r / m, 1r / m, etc.

[0048] S12, the wet material after being evaporated in the smelting furnace is subjected to incineration, and the smelting furnace maintains the second speed n2 for the first preset time T1. The smelting furnace is heated by a combustion spray gun to achieve incineration of the wet material after being evaporated, and the smelting furnace maintains the second speed n2. The second speed can satisfy the relationship: 0.8r / m≤n1≤1.2r / m, that is, the second speed can be any value between 0.8r / m and 1.2r / m, for example, the second speed can be but not limited to 0.8r / m, 0.9r / m, 1r / m, 1.1r / m, 1.2r / m, etc., and such a setting can reduce the dust content of the flue gas. The smelting furnace rotates and lasts for a first preset time T1, and the first preset time can satisfy the relationship: 10m≤T1≤15m, that is, the first preset time can be any time between 10 minutes and 15 minutes. For example, the first preset time can be but not limited to 10m, 12m, 14m, 15m, etc., until the signal shows that the temperature in the smelting furnace reaches 850℃-900℃, then the next batch of materials can be added. The material processing process can optimize the particle size and morphology of the wet material, making it easier to contact and react with the reactants, thereby improving the reaction efficiency, so as to facilitate subsequent smelting.

[0049] like Figure 2As shown, in some embodiments of the present application, the feeding method may further include: S13, melting the wet material in the smelting furnace and the smelting furnace maintains a third speed n3 and continues for a second preset time T2. After the wet material is added, and the temperature in the smelting furnace is raised to 800°C-900°C, smelting can be performed, the smelting furnace can maintain a third speed n3, and the third speed can satisfy the relationship: 8r / m≤n3≤12r / m, that is, the third speed can be any value between 8r / m and 12r / m, for example, the third speed can be but not limited to 8r / m, 9r / m, 10r / m, 11r / m, 12r / m, etc. The temperature in the smelting furnace continues to rise to fully melt the material, and the smelting time can be the second preset time T2, and the second preset time can satisfy the relationship: 15m≤T2≤25m, that is, the second preset time can be any value between 15 minutes and 25 minutes, and the second preset time is preferably 20 minutes, and the natural gas flow rate of the combustion gun is increased to 2Nm 3 / min-2.5Nm 3 / min, until the temperature in the smelting furnace rises to 1130℃-1170℃, and all the materials in the smelting furnace are converted into molten liquid. As the smelting furnace maintains the third speed rotation and the combustion spray gun continues to be at a high temperature, the melt in the smelting furnace is evenly mixed, the smelting furnace presents a slightly reducing atmosphere, and various substances undergo various reactions such as decomposition, reduction and slag formation. During the entire smelting process, the melt temperature in the smelting furnace is maintained at a high temperature of 1130-1170℃ until the operation is completed.

[0050] The smelting process of the smelting furnace includes reduction smelting, blowing, refining and casting of gold-silver alloy. Reduction smelting can enrich the gold and silver in the copper-removed anode mud to form precious lead, so that the impurities enter the slag or volatilize into the smoke and dust and are removed, so as to achieve the initial separation of gold, silver and impurities, and prepare for the further separation of gold, silver and impurities. The reduction smelting impurity removal process is divided into three steps: some Cu, Se, Bi and Te in the material are reduced and enter the precious lead; the silver chloride in the material is decomposed, and the chlorine reacts with lead to form PbCl2 flue gas and enter the purification dust collection system; 20-30% of the Pb in the material enters the precious lead, and the rest of the Pb enters the slag or the smoke, and a small amount of Sb enters the precious lead.

[0051] After the reduction smelting operation is completed, the precious lead samples are extracted for testing and analysis, and the amount of flux to be added is determined through metallurgical calculations based on the precious lead composition. After the last batch of smelting slag is discharged, the smelting furnace is tilted back to the operating position, the combustion spray gun is inserted and started to heat up, and the blowing spray gun is inserted. The distance between the nozzle and the melt surface is about 15 cm. This distance must be maintained throughout the blowing process. The blowing air button is started, and the compressed air leaves the nozzle at supersonic speed and blows toward the melt, and the blowing operation begins. Blowing includes primary blowing and secondary blowing. The compressed air flow rate in the primary blowing is 500-750Nm 3 / h, the rotation speed of the smelting furnace is 15-16r / m, the melt temperature in the smelting furnace is controlled between 1150-2000℃, and the blowing time is controlled within 1 hour. Most of the Pb and part of Cu, Sb, Bi, and Te in the melt can be strongly oxidized into slag through one blowing.

[0052] During the blowing process, the melting point of the furnace will be violently churned and splashed due to the high-speed blowing air blowing toward the melt. The blowing spray gun is close to the melt surface, and the surface of the spray gun will inevitably be attached with condensed adhesives. Therefore, the operator should check the adhesion of the gun body regularly. During the inspection, if there are not many adhesives on the surface of the gun body, the spray gun can be withdrawn from the furnace mouth in time, and the adhesives on the surface of the gun body can be cleaned by knocking, and then the spray gun can be reinserted to continue blowing. If there are many adhesives on the surface of the gun body, the spray gun cannot be withdrawn from the furnace mouth. At this time, the spray gun should be returned to the blowing position, the blowing air should be turned off, and part of the adhesives can be melted by the high temperature in the furnace. Then try to withdraw the spray gun from the furnace mouth again to clean the adhesives, so as to avoid the risk of bending and damage to the gun body. After a blowing operation, the slag layer on the surface of the alloy melt should be discharged. Slag samples and metal samples should be promptly extracted from the smelting furnace and sent for rapid testing and analysis. The test results should be fed back within 15 minutes. Through sampling and testing, technicians and operators can timely understand the Ag content in the blowing slag and the impurity content in the alloy melt, which is beneficial to the next blowing operation.

[0053] The compressed air flow rate during secondary blowing is 500~750Nm 3 / h, the speed of the smelting furnace is 15-16r / m, the temperature of the melt in the smelting furnace is controlled between 1150 and 2000℃, the time of the secondary blowing is controlled at 2-3h, and the number of inspections of the blowing spray gun is 2-3 times / h. During the secondary blowing operation, most of the Se in the melt is oxidized to SeO2, Te is oxidized to TeO2 and volatilizes into the flue gas, and some Pb, Cu, Sb, Bi, and Te are strongly oxidized into slag. Until the end of the blowing operation, the slag samples and alloy samples are promptly extracted and sent for rapid testing and analysis. The test results are fed back within 15 minutes. If the test results of the alloy sample show that the alloy contains impurities such as Pb, Sb, and Bi, which are ≤0.01%, and only a small amount of Cu, Te, and Se enter the alloy, it indicates that the end of the blowing operation has been reached. The slag removal operation of the blowing slag is the same as that of the smelting slag, but the slag layer on the surface of the alloy melt must be removed cleanly during the slag removal. If necessary, a special slag removal tool can be used to remove the slag layer on the surface of the melt to facilitate the next refining operation.

[0054] After the blowing operation is completed, the amount of flux to be added is determined by metallurgical calculation according to the Te content of the alloy. The flux can be soda. The temperature of the melt in the smelting furnace is raised to nearly 2000°C. Part of the impurity Te reacts with soda to form sodium tellurite into slag, and the remaining impurities Se and Te are strongly oxidized and volatilized into the flue gas. During the refining operation, it is important to control the temperature in the furnace so that it is not too high. If the temperature is too high, the impurities that have penetrated into the brick lining will overflow into the melt again, causing adverse effects on the quality of the gold-silver alloy. After the refining operation is completed, the slag layer on the surface of the melt is removed cleanly by manual slag removal using special slag removal tools. The alloy liquid sample is extracted in time and cast into a sample ingot, which is sent for rapid testing and analysis after water cooling. The test results must be fed back within 15 minutes. If the test results show that the alloy contains (Au+Ag) ≥ 97%, impurity Cu < 2.5%, Pb, Se, Te, Bi and Sb are all ≤ 0.02%, it means that the refining operation has reached the end point, and the gold and silver alloy melt in the furnace can be prepared for casting, and the casting time can be 2 to 3 hours. The smelting furnace is a periodic operation, and each cycle operation time is 26 hours.

[0055] like Figure 3 As shown, in some embodiments of the present application, adding dry materials to the smelting furnace in batches and smelting further comprises: S21, adding the first batch of dry materials to the smelting furnace. The dry materials can be added to the smelting furnace through a feeding device, and the first batch of dry materials can also be added in multiple small batches. The ratio between the decoppered anode mud and the flux is mainly calculated by a computer based on the planned input material composition, the target slag rate, the mixed ore composition, etc.

[0056] S22, the first batch of dry materials in the smelting furnace is evaporated and the smelting furnace maintains the first speed n1. The evaporation method of the first batch of dry materials is the same as the evaporation method of the wet materials, that is, the dry materials are added to the smelting furnace and the smelting furnace is tilted to the operating position for evaporation, and the dry materials in the smelting furnace are evaporated and the moisture in the dry materials is removed by using a combustion spray gun, and the moisture content in the dry materials is 1%-3%.

[0057] S23, the first batch of dry materials after being evaporated in the smelting furnace are subjected to incineration, and the smelting furnace maintains the second speed n2 and lasts for the first preset time T1. The melting furnace is heated by a combustion spray gun to achieve incineration of the wet materials after being evaporated, the melting furnace maintains the second speed n2, and the second speed can satisfy the relationship: 0.8r / m≤n1≤1.2r / m, the melting furnace rotates and lasts for the first preset time T1, and the first preset time can satisfy the relationship: 10m≤T1≤15m, until the signal shows that the temperature in the melting furnace reaches 850℃-900℃, the next small batch of materials can be added, and the incineration process can optimize the particle size and morphology of the dry materials, making it easier to contact and react with the reactants, thereby improving the reaction efficiency, so as to facilitate subsequent smelting.

[0058] S24, melt the first batch of dry materials in the melting furnace and keep the melting furnace at the third speed n3 for the second preset time T2. After the dry material is added, the first batch of dry materials is melted, the melting furnace can maintain the third speed n3, the third speed can satisfy the relationship: 8r / m≤n3≤12r / m, the temperature in the melting furnace continues to rise to fully melt the materials, the melting time can be the second preset time T2, the second preset time can satisfy the relationship: 15m≤T2≤25m.

[0059] like Figure 3 As shown, in some embodiments of the present application, adding dry materials to the smelting furnace in batches and smelting further includes: S25, extracting the slag in the smelting furnace and detecting the current content of silver in the slag. Extracting the current content of silver in the slag in the smelting furnace, and comparing the current content of silver with the preset content of silver.

[0060] S26, if the current silver content in the slag is greater than the preset content, continue smelting; if the current silver content in the slag is less than the preset content, perform slag removal and add a second batch of dry materials into the smelting furnace. After adding the second batch of dry materials, continue to perform evaporation, material processing and smelting steps. The current content of silver in the slag in the smelting furnace is extracted, and the current content of silver is compared with the preset content of silver, wherein the preset content of silver is: 0.4%≤Ag≤0.5%. If the current content of silver in the slag is greater than the preset content, smelting is continued; if the current content of silver in the slag is less than the preset content, the second batch of dry materials is added; after adding the second batch of dry materials, the above-mentioned evaporation and blowing are continued, and the second batch of dry materials in the smelting furnace are smelted again to extract the current content of silver in the slag in the smelting furnace; if the current content of silver in the slag is greater than the preset content, smelting is continued; if the current content of silver in the slag is less than the preset content, slag discharge is performed. The above method can be used to control the content of silver in the slag, and the smelting slag discharge operation is performed after the silver in the slag meets the emission index. The current content of silver can be sent for rapid testing and analysis by extracting slag samples, and the test results need to be fed back within 15 minutes.

[0061] Reference below Figure 4-Figure 8A smelting device 10 for anode mud according to an embodiment of the present application is described, the smelting device 10 includes a smelting furnace 11, a first feeding device 12 and a second feeding device 13. The smelting furnace 11 is rotatably arranged on the ground and a smelting chamber 111 is formed in the smelting furnace 11. A feeding port 112 connected to the smelting chamber 111 is formed on the smelting furnace 11. The first feeding device 12 is formed with a first feeding port 1212 that can be selectively connected to the feeding port 112. The first feeding device 12 is suitable for adding wet material or blowing slag into the smelting chamber 111 through the first feeding port 1212. The second feeding device 13 is formed with a second feeding port 1332 that can be selectively connected to the feeding port 112. The second feeding device 13 is suitable for adding decoppered anode mud in dry material into the smelting chamber 111 through the second feeding port 1332.

[0062] like Figure 4 As shown, specifically, the smelting device 10 may include a smelting furnace 11, a first feeding device 12 and a second feeding device 13. The smelting furnace 11 may be disposed on a base 15, and the smelting furnace 11 may be able to rotate relative to the base 15. A smelting chamber 111 may be formed in the smelting furnace 11, and a feeding port 112 may be formed on the smelting furnace 11 and connected to the smelting chamber 111. The smelting furnace 11 may change the position of the feeding port 112 by rotating, thereby realizing the addition of different materials into the smelting furnace 11.

[0063] The first feeding device 12 may be formed with a first feeding port 1212, which can be selectively connected to the feeding port 112, and the first feeding device 12 can add wet material or blowing slag into the smelting chamber 111 through the first feeding port 1212. The second feeding device 13 may be formed with a second feeding port 1332, which can be selectively connected to the feeding port 112, and the second feeding device 13 can add decoppered anode mud into the smelting chamber 111 through the second feeding port 1332. It can be understood that the smelting furnace 11 can change the position of the feeding port 112 by rotating, so that the feeding port 112 corresponds to the first feeding port 1212 or the second feeding port 1332 to realize the loading of wet material or dry material.

[0064] In short, the smelting device 10 of the present application includes a smelting furnace 11, a first feeding device 12 and a second feeding device 13. The smelting furnace 11 can be rotated to correspond to the first feeding device 12 or the second feeding device 13. The first feeding device 12 and the second feeding device 13 can respectively add wet materials and dry materials to the smelting furnace 11. In the actual feeding process, the feeding method of first adding wet materials to the smelting furnace 11 and then adding dry materials to the smelting furnace 11 can be met, and the wet materials and dry materials are melted separately to extract heavy metals in the anode mud. Compared with the prior art, the smelting device 10 can be used for the above-mentioned feeding method, the process flow is compact, the production cycle is shortened, the production efficiency is improved, the environmental pollution is reduced, and the needs of sustainable development are met.

[0065] like Figure 7 As shown, in some embodiments of the present application, the first feeding device 12 may include a ship-type feeder 121 and a crane 122, a feed port 1211 may be formed at one end of the ship-type feeder 121, a first feeding port 1212 may be formed at the other end of the ship-type feeder 121, and a connecting end 1213 may be formed at the top of the ship-type feeder 121, the crane 122 can be connected to the connecting end 1213, and the crane 122 can move in the height direction to drive the ship-type feeder 121 to move, specifically, a hook 1221 may be provided on the crane 122, the hook 1221 can be connected to the connecting end 1213, the wet material or blowing slag enters into the ship-type feeder 121 from the feed port 1211, and the crane 122 drives the ship-type feeder 121 to move so that the internal wet material or blowing slag flows out from the first feeding port 1212.

[0066] like Figure 4 As shown, in some embodiments of the present application, the second feeding device 13 may include a material conveying device 131, a flux conveying device 132 and a mixing device 133. The material conveying device 131 may have a first containing bin 1311, which may be used to contain dry decoppered anode mud, and the first containing bin 1311 has a first outlet 1312. The flux conveying device 132 has a flux bin 1321, which may be used to contain flux, and the flux bin 1321 has a second outlet 1322. The mixing device 133 may have a mixing chamber 1331, and the mixing chamber 1331 may be connected to the first outlet 1312 and the second outlet 1322, respectively. The mixing chamber 1331 may be used to mix the dry decoppered anode mud and the flux to form decoppered anode mud.

[0067] like Figure 5As shown, in some embodiments of the present application, the material conveying device 131 may also have a second containing bin 1313, the second containing bin 1313 may be used to contain the wet decoppered anode mud, a dryer 1314 may be arranged between the second containing bin 1313 and the first containing bin 1311, the dryer 1314 may be used to dry the wet decoppered anode mud to form dry decoppered anode mud, the inlet end of the dryer 1314 may be connected to the outlet end of the second containing bin 1313, and the outlet end of the dryer 1314 may be connected to the outlet end of the second containing bin 1313. It is connected to the inlet end of the first containing bin 1311, and a first conveyor 1315 can be arranged between the dryer 1314 and the second containing bin 1313. A scraper conveyor 1316 and an elevator 1317 can be arranged between the dryer 1314 and the first containing bin 1311. A bin scale 14 can be arranged on the first containing bin 1311, and a second conveyor 1318 can be arranged at the first outlet 1312 of the first containing bin 1311. The second conveyor 1318 can be constructed as a screw conveyor.

[0068] like Figure 6 As shown, in some embodiments of the present application, the flux bin 1321 can be configured as a plurality of parallel arrangements, the outlet ends of the plurality of flux bins 1321 are configured as a second outlet 1322, and each flux bin 1321 is provided with a bin-type scale 14, and a second conveyor 1318 can be provided at the second outlet 1322. By configuring the flux bin 1321 as a plurality of flux bins, the flux can be easily prepared, and the weight can be calculated by the bin-type scale 14 to meet the requirements of flux preparation. The mixing device 133 can be communicated with the first outlet 1312 and the second outlet 1322 respectively, and the dry copper-depleted anode mud and the flux can be respectively conveyed to the mixing chamber 1331 through the second conveyor 1318, and the mixing chamber 1331 has a second feeding port 1332 communicated with the mixing chamber 1331, and a feeding valve 1333 is provided between the second feeding port 1332 and the feeding port 112, so as to facilitate the control of the amount of feeding.

[0069] like Figure 8 As shown, in some embodiments of the present application, the smelting furnace 11 is provided with a combustion lance 113 and a blowing lance 114 which are connected to the smelting chamber 111. The combustion lance 113 and the blowing lance 114 can respectively realize the smelting and blowing of the smelting furnace 11. A part of the combustion lance 113 and the blowing lance 114 are arranged in the smelting chamber 111 to facilitate the smelting and blowing in the smelting furnace 11.

[0070] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0071] In the description of this application, "first feature" or "second feature" may include one or more of the features.

[0072] In the description of the present application, the meaning of "plurality" is two or more. In the description of the present application, a first feature "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them.

[0073] In the description of the present application, “above”, “over” and “above” a first feature to a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is horizontally higher than the second feature.

[0074] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0075] Although the embodiments of the present application have been shown and described, those skilled in the art will appreciate that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present application, and that the scope of the present application is defined by the claims and their equivalents.

Claims

1. A feeding method for smelting anode mud, characterized in that: include: Adding wet material into the smelting furnace, wherein the wet material includes at least one of sludge from a flue gas treatment system, secondary precipitated selenium, and replacement silver powder; Dry materials are added into the smelting furnace in batches and smelting is performed. The dry materials include decopperized anode mud and blowing slag.

2. The feeding method for smelting anode mud according to claim 1, characterized in that: The adding of wet materials into the smelting furnace further comprises: The wet material in the smelting furnace is evaporated to dryness while the smelting furnace maintains a first speed n1; The wet material evaporated in the smelting furnace is melted and the smelting furnace maintains a second rotation speed n2 for a first preset time T1.

3. The feeding method for smelting anode mud according to claim 2, characterized in that: Also includes: The wet material in the smelting furnace is smelted and the smelting furnace maintains a third rotation speed n3 for a second preset time T2.

4. The feeding method for smelting anode mud according to claim 3, characterized in that: Adding dry materials into the smelting furnace in batches and smelting also includes: adding a first batch of dry materials into the smelting furnace; The first batch of dry materials in the smelting furnace is evaporated to dryness while the smelting furnace maintains a first speed n1; The first batch of dry materials evaporated in the smelting furnace are subjected to melting and the smelting furnace is kept at a second speed n2 for a first preset time T1; The first batch of dry materials in the smelting furnace is smelted and the smelting furnace maintains a third rotation speed n3 for a second preset time T2.

5. The feeding method for smelting anode mud according to claim 4, characterized in that: The step of adding dry materials into the smelting furnace in batches and smelting the materials further comprises: extracting slag from the smelting furnace and detecting the current content of silver in the slag; If the current silver content in the slag is greater than the preset content, smelting continues; if the current silver content in the slag is less than the preset content, slag removal is performed and a second batch of dry materials is added to the smelting furnace.

6. The feeding method for smelting anode mud according to claim 5, characterized in that: The first speed satisfies: 0.5 r / m≤n1≤1 r / m, the second speed n2 satisfies: 0.8 r / m≤n1≤1.2 r / m, and the third speed satisfies: 8 r / m≤n3≤12 r / m; The first preset time T1 satisfies: 10m≤T1≤15m, and the second preset time T2 satisfies: 15m≤T2≤25m.

7. A smelting device for anode mud, characterized in that: include: A smelting furnace, wherein the smelting furnace is rotatably disposed on a base and a smelting cavity is formed in the smelting furnace, and a feeding port communicating with the smelting cavity is formed on the smelting furnace; a first feeding device, wherein the first feeding device is formed with a first feeding port that can be selectively connected to the feeding port, and the first feeding device is suitable for adding wet material or blown slag into the smelting chamber through the first feeding port; A second feeding device is formed with a second feeding port which can be selectively connected with the feeding port, and the second feeding device is suitable for adding the copper-depleted anode mud in the dry material into the smelting chamber through the second feeding port.

8. The smelting device for anode mud according to claim 7, characterized in that: The first feeding device comprises: A boat-shaped feeder, wherein a feed port is formed at one end of the boat-shaped feeder, a first feed port is formed at the other end of the boat-shaped feeder, and a connection end is formed at the top of the boat-shaped feeder; A crane is connected to the connecting end and can selectively move in a height direction to drive the ship-shaped feeder to move.

9. The smelting device for anode mud according to claim 7, characterized in that: The second feeding device comprises: A material conveying device, wherein the material conveying device has a first containing bin, the first containing bin is suitable for containing dry decopperized anode mud and has a first outlet; A flux delivery device, the flux delivery device having a flux bin, the flux bin being adapted to contain the flux and having a second outlet; A mixing device, wherein the mixing device has a mixing chamber, and the mixing chamber is communicated with the first outlet and the second outlet respectively, and the mixing chamber is suitable for mixing the dry decoppered anode mud and flux to form dry material.

10. The smelting device for anode mud according to claim 9, characterized in that: The material conveying device also has a second containing bin, which is suitable for containing wet decopperized anode mud. A dryer is arranged between the second containing bin and the first containing bin, and the inlet end of the dryer is connected to the outlet end of the second containing bin, and the outlet end of the dryer is connected to the inlet end of the first containing bin.

11. The smelting device for anode mud according to claim 9, characterized in that: The flux bins are structured to be multiple and arranged in parallel, and the outlet ends of the multiple flux bins are structured to be the second outlet.

12. The smelting device for anode mud according to claim 9, characterized in that: The mixing device has the second feeding port communicated with the mixing chamber, and a feeding valve is arranged between the second feeding port and the feeding port.

13. The smelting device for anode mud according to claim 7, characterized in that: The smelting furnace is provided with a combustion lance and a blowing lance which are communicated with the smelting chamber.

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