A method for resource utilization of lead-zinc smelting hazardous waste slag

Abstract

This invention discloses a method for the resource utilization of hazardous waste slag from lead-zinc smelting. The specific steps are as follows: Hazardous waste slag from lead-zinc smelting is uniformly mixed with a composite microwave absorbing additive and then activated in a microwave field; the activated material is fed into a bottom-blown furnace for oxidation smelting, producing primary crude lead and high-lead slag; the high-lead slag is then reduced and smelted in a side-blown reduction furnace to obtain secondary crude lead and reducing slag; the reducing slag is then smelted in a fuming furnace; the primary and secondary crude lead are mixed with the additive and subjected to wet electrolysis to obtain anode slag and anode plates; the anode slag is fed into a reverberatory furnace, and the anode plates are electrolyzed for the recovery of copper, silver, and gold. The microwave activation pretreatment improves the reaction rate and shortens the reaction time during the roasting process. The novel additive added during electrolysis is low-cost, environmentally friendly, and effectively inhibits the growth of dendritic crystals on the electrodes, which is of great significance for the comprehensive utilization of resources and environmental protection.

Description

Technical Field

[0001] This invention relates to the field of solid waste treatment technology in metallurgy, specifically to a method for the resource utilization of hazardous waste residue from lead-zinc smelting. Background Technology

[0002] Long-term, large-scale stockpiling of waste slag occupies a significant amount of land, and the release of heavy metal ions from it causes enormous damage to the surrounding ecological environment. At the same time, the waste slag also contains a large amount of valuable metal resources, such as lead, copper, silver, and gold, and is therefore considered an important secondary resource with high recycling value. Currently, the main processes for extracting valuable metals include hydrometallurgical processes, flotation, pyrometallurgical processes, and combined processes. While pyrometallurgical processes offer simple separation of valuable metals, they are energy-intensive. Hydrometallurgical leaching of valuable metals from smelting waste slag achieves high recovery rates under both acidic and alkaline conditions, but the resulting large volume of leachate is difficult to treat. Flotation can effectively recover precious metals such as gold and silver from smelting slag, but it cannot recover valuable metals like lead and zinc, leading to resource waste. To address the issue of recycling hazardous waste slag from lead-zinc smelting, CN108531740 B discloses a method for recovering valuable metals such as lead, zinc, and silver from zinc smelting slag. Although the recovery rate of valuable metals is relatively high, the process is lengthy and complex. CN110306060B discloses a method for the comprehensive recovery of valuable metals from lead and zinc slag using a pyrometallurgical-hydrometallurgical parallel process. However, this method involves a long smelting process, and the addition of gelatin during electrolysis generates a large number of colloidal ions and amino acids from decomposition products. This significantly reduces the conductivity of the electrolyte, resulting in poor dispersion and rough crystallization on the lead cathode surface, which negatively impacts subsequent electrolysis. Therefore, the efficient treatment of hazardous waste slag from lead and zinc smelting is urgently needed. Summary of the Invention

[0003] To address the aforementioned technical challenges, this invention provides a method for the resource utilization of hazardous waste residue from lead-zinc smelting. The technical solution of this invention is as follows: A method for the resource utilization of hazardous waste residue from lead-zinc smelting, wherein the main chemical components and mass percentages of the hazardous waste residue from lead-zinc smelting are: lead 40.00%–60.00%, zinc 4.00%–6.00%, copper 0.50%–2.00%, iron 15.00%–20.00%, gold 40.00 g / t–60.00 g / t, and silver 150.00 g / t–250.00 g / t. The specific steps are as follows: (1) The smelting hazardous waste residue and the composite microwave absorbing additive are mixed evenly at a ratio of hazardous waste residue: microwave absorbing additive = 1: 0.05 to 0.1 and then fed into a microwave field for activation treatment. The microwave frequency is 4 GHz and the activation time is 10 to 20 min. The composite microwave absorbing additive is a mixture of graphene and carbon black, and the mass mixing ratio is 0.1 to 0.2: 1. (2) The activated materials are fed into the bottom-blown oxidation furnace for smelting, producing primary crude lead, matte, high-lead slag, flue ash and SO2 flue gas; (3) The high-lead slag produced in step (2) is reduced and smelted in a side-blown reduction furnace to obtain secondary crude lead, reducing slag and flue ash. The oxygen concentration in the side-blown reduction furnace is 50% to 60%, the gas supply pressure is 0.2 to 0.25 MPa, the reduction time in the side-blown furnace is 1 to 2 hours, the side-blown reduction furnace uses pulverized coal as fuel and reducing agent, -0.074 mm accounts for 80% to 85%, and the moisture content is 0.5% to 1%. (4) The reducing residue in step (3) is fed into the fuming furnace to produce secondary zinc oxide product; (5) Primary and secondary crude lead are mixed with composite additives and subjected to wet electrolysis to obtain anode plates and anode slag. The electrolyte used in lead electrolysis consists of an aqueous solution of fluorosilicate and lead fluorosilicate, with a total fluorosilicate concentration of 100–4160 g / L and a current density of 160 A / m. 2 ~200A / m 2 The electrolyte temperature is 30℃~45℃, the electrolyte circulation rate is 20L / min~30L / min, and the composite additive is a mixture of sorbitol and aloe vera, with 4~6 parts of sorbitol and 1~2 parts of aloe vera, and the amount of composite additive is 0.05~0.5g / L. (6) Lead and anode mud are deposited in the anode plate and cathode plate through the electrolytic cell and recovered to obtain lead ingots; (7) Electrolytic anode slag is passed through a reverberatory furnace to produce reflective crude lead, matte, and molten slag; (8) Gold and silver are recovered from anode mud and refining slag through silver reverberatory furnace and precious lead furnace; (9) The treated lead smelting hazardous waste slag is transformed into general solid waste and utilized as building material resources. In step (2), the grade of copper matte is 5.00% to 10.00%. In step (2), the flue dust is desulfurized and recycled back to the bottom-blown oxidation furnace for smelting. The main chemical components and mass percentages of the flue dust are: lead 40.00% to 50.00%, zinc 5.00% to 10.00%, copper 0.001% to 0.10%, and sulfur 0.001% to 0.20%. The blowing time in the bottom-blown oxidation furnace is 0.5h to 2h. The flue gas temperature of the side-blown reduction furnace in step (3) is 1100℃~1300℃. In step (4), the fuming furnace produces secondary zinc oxide, wherein the zinc grade is 10.00% to 15.00%. In step (6), lead is electrolyzed to obtain lead ingot products, and the lead content in the lead ingots is 80.00% to 98.00%. In step (7), the lead content in the reflective crude lead is 20.00% to 30.00%; and the copper content in the matte is 5.00% to 15.00%. The main chemical components and mass percentages of the silver ingot in step (8) are as follows: silver 90.00% to 97.00%; gold anode mud 70.00% to 80.00%. The main chemical components and mass percentages of the general solid waste residue in step (9) are as follows: lead 0.01% to 0.10%, zinc 0.01% to 0.10%, copper 0.01% to 0.10%, iron 0.50% to 1.00%, gold 0.001 g / t to 0.02 g / t, and silver 0.001 g / t to 0.02 g / t. The present invention has the following beneficial effects: 1. Lead and zinc oxides in hazardous waste residue exhibit good microwave absorption properties, while copper metal suffers from poor absorption due to the presence of a surface passivation layer. Mixing carbon-based microwave absorbing materials evenly with hazardous waste residue followed by microwave activation treatment enhances microwave absorption and improves activation capacity, which is beneficial for subsequent smelting and reduces energy consumption. 2. Using sorbitol and aloe vera as composite additives in the leaching process avoids the problems of reduced electrolyte conductivity caused by the use of gel-based agents, and lead cathode crystallization caused by the use of agents such as phenol and naphthol. Sorbitol and aloe vera have high solubility and contain -OH groups with high polarization properties, resulting in good polarization performance. During electrolysis, the oxidation effect of sorbitol and aloe vera enhances cathode polarization and effectively inhibits the growth of dendritic crystals on the electrode. 3. The process of this invention is simple, environmentally friendly, and has a high recovery rate of valuable metals, thus achieving the goal of resource utilization and volume reduction of smelting slag. Attached Figure Description

[0004] Figure 1 This is the process flow for treating smelting waste slag in the method of the present invention. Detailed Implementation

[0005] The technical solution of the present invention will be clearly and completely described below with reference to the embodiments. It should be understood that the described embodiments are only for illustration and explanation of the present invention and are not intended to limit the present invention. Example 1 This embodiment is an example of a method for resource utilization of hazardous waste residue from lead-zinc smelting according to the present invention. The smelting waste residue comes from a smelter in Guangxi and includes the following steps: (1) Smelting hazardous waste slag and composite microwave absorbing additive were mixed evenly in a certain proportion and then fed into a microwave field for activation treatment. The main chemical components and mass percentages of the smelting hazardous waste slag were: lead 40.87%, zinc grade 4.27%, copper grade 0.92%, iron grade 16.47%, gold grade 44.22 g / t, silver 157.29 g / t, microwave frequency 4 GHz, and activation time 10 min. The mixing ratio of hazardous waste slag and microwave absorbing additive was 1:0.05. (2) The activated materials are fed into the bottom-blown oxidation furnace for smelting, producing primary crude lead, matte, high-lead slag, flue ash and SO2 flue gas. Of which, copper matte accounted for 6.59%; (3) In step (2), the high-lead slag is reduced and smelted in a side-blown reduction furnace to obtain secondary crude lead, reducing slag, and flue ash. The main valuable metal component in the reducing slag is zinc. It enters the fuming furnace to produce secondary zinc oxide and fuming furnace slag. The zinc grade is 11.48%. The oxygen concentration in the side-blown furnace is 50%, and the gas supply pressure is 0.2 MPa. Pulverized coal in the side-blown furnace is used as fuel and reducing agent. The -0.074mm coal accounts for 80%, and the moisture content is 0.5%. (4) The reducing residue in step (3) is fed into the fuming furnace to produce secondary zinc oxide product; (5) Primary and secondary crude lead are mixed and electrolyzed in the anode furnace of the electrolysis workshop. The electrolyte consists of an aqueous solution of fluorosilicate and lead fluorosilicate, with a total fluorosilicate concentration of 100 g / L and an electrolyte temperature of 30℃. The electrolyte circulation rate is 20 L / min. The current density is 160 A / m³. 2 The amount of composite additive used is 0.05 g / L. The anode slag is processed through a reverberatory furnace to produce reflective crude lead and matte. The main chemical components and mass percentages of the reflective crude lead are: lead 21.04%; and copper 6.89% in the matte. (6) The anode plate and anode sheet pass through an electrolytic cell to precipitate lead and anode mud, and recover lead ingots; the precipitated lead yields lead ingot products with a lead content of 85.67%; (7) Electrolytic anode slag is processed through a reverberatory furnace to produce reflective crude lead, matte, and slag. The copper content in the matte is 2.55%. (8) Anode slime and refining slag are processed through a silver reverberatory furnace and a precious lead furnace to recover gold and silver. The main chemical components and mass percentages are: silver 93.59%; gold anode slime 73.19%; (9) The treated lead smelting hazardous waste slag is transformed into general solid waste and reused as building material resources. In step (2), the flue gas undergoes desulfurization, and the recovered dust is returned to the oxidation furnace for smelting. The main chemical components and mass percentages of the dust are: lead 47.21%, zinc 7.04%, copper 0.10%, and sulfur 0.20%. In step (3), the main chemical components and mass percentages of the flue dust are: lead 18.00%, zinc 3.01%, copper 0.10%, and sulfur 0.20%. The main chemical components and mass percentages of the waste residue are: lead 0.01%, zinc 0.01%, copper 0.01%, iron 0.50%, gold 0.001 g / t, and silver 0.001 g / t. Example 2 This embodiment is another example of the resource utilization method for hazardous waste residue from lead-zinc smelting according to the present invention. The smelting waste residue comes from a smelter in Yunnan Province, and the specific steps include the following: (1) Smelting hazardous waste slag and composite microwave absorbing additive were mixed evenly in a certain proportion and then fed into a microwave field for activation treatment. The main chemical components and mass percentages of the smelting hazardous waste slag were: lead 49.57%, zinc 5.24%, copper 1.28%, iron 17.38%, gold 47.51 g / t, and silver 186.47 g / t. The microwave frequency was 4 GHz, and the activation time was 15 min. The mixing ratio of hazardous waste slag and microwave absorbing additive was 1:0.15. (2) Hazardous waste slag from lead smelting is fed into a bottom-blown oxidation furnace for smelting, producing primary crude lead, matte, high-lead slag, flue dust, and SO2 flue gas. The matte grade is 7.99%. (3) In step (2), the high-lead slag is reduced and smelted in a side-blown reduction furnace to obtain secondary crude lead, reducing slag, and flue ash; the valuable metal component of the reducing slag is mainly zinc, which enters the fuming furnace to produce secondary zinc oxide and fuming furnace slag, with a zinc grade of 13.47%. The oxygen concentration in the side-blown furnace is 55%, and the gas supply pressure is 0.22 MPa. Pulverized coal in the side-blown furnace is used as fuel and reducing agent, with -0.074 mm accounting for 82% and a moisture content of 0.8%. (4) The reducing residue in step (3) is fed into the fuming furnace to produce secondary zinc oxide product; (5) Primary and secondary crude lead are mixed and electrolyzed in the anode furnace of the electrolysis workshop. The electrolyte consists of an aqueous solution of fluorosilicate and lead fluorosilicate, with a total fluorosilicate concentration of 120 g / L and an electrolyte temperature of 35°C. The electrolyte circulation rate is 25 L / min. The current density is 180 A / m³. 2 The amount of composite additive used is 0.08 g / L. The anode slag is processed through a reverberatory furnace to produce reflective crude lead and matte. The main chemical components and mass percentages of the reflective crude lead are: lead 24.59%; and copper 7.50% in the matte. (6) The anode plate and anode sheet pass through the electrolytic cell to precipitate lead and anode mud, and recover lead ingots; the precipitated lead yields lead ingot products with a lead grade of 89.76%; (7) Electrolytic anode slag is processed through a reverberatory furnace to produce reflective crude lead, matte, and slag. The copper content in the matte is 3.59%. (8) Anode slime and refining slag are processed through a silver reverberatory furnace and a precious lead furnace to recover gold and silver. The main chemical components and mass percentages are as follows: silver in silver ingots 95.88%; gold anode slime 78.10%; (9) The treated lead smelting hazardous waste slag is transformed into general solid waste and reused as building material resources. In step (2), the flue gas undergoes desulfurization, and the recovered dust is returned to the oxidation furnace for smelting. The main chemical components and mass percentages of the dust are: lead 46.27%, zinc 6.07%, copper 0.10%, and sulfur 0.20%. The main chemical components and mass percentages of the flue dust in step (3) are: lead 17.01%, zinc 2.41%, copper 0.10%, and sulfur 0.20%. The main chemical components and mass percentages of the waste residue are: lead 0.01%, zinc 0.015%, copper 0.02%, iron 0.55%, gold 0.001 g / t, and silver 0.001 g / t. Example 3 This embodiment is another example of the resource utilization method for hazardous waste residue from lead-zinc smelting according to the present invention. The smelting waste residue comes from a smelter in Jiangxi Province, and the specific steps include the following: (1) Smelting hazardous waste slag and composite microwave absorbing additive were mixed evenly in a certain proportion and then fed into a microwave field for activation treatment. The main chemical components and mass percentages of the smelting hazardous waste slag were: lead 55.48%, zinc 5.76%, copper 1.57%, iron 18.69%, gold 51.87 g / t, and silver 188.02 g / t. The microwave frequency was 4 GHz, and the activation time was 20 min. The mixing ratio of hazardous waste slag and microwave absorbing additive was 1:0.15. (2) Hazardous waste slag from lead smelting is fed into a bottom-blown oxidation furnace for smelting, producing primary crude lead, matte, high-lead slag, flue dust, and SO2 flue gas. The matte grade is 8.51%. (3) In step (2), the high-lead slag is reduced and smelted in a side-blown reduction furnace to obtain secondary crude lead, reducing slag, and flue ash; the valuable metal component of the reducing slag is mainly zinc, which enters the fuming furnace to produce secondary zinc oxide and fuming furnace slag, with a zinc grade of 14.67%. The oxygen concentration in the side-blown furnace is 60%, and the gas supply pressure is 0.25 MPa. Pulverized coal in the side-blown furnace is used as fuel and reducing agent, with -0.074 mm accounting for 85% and a moisture content of 1.0%. (4) The reducing residue in step (3) is fed into the fuming furnace to produce secondary zinc oxide product; (5) Primary and secondary crude lead are mixed and electrolyzed in the anode furnace of the electrolysis workshop. The electrolyte consists of an aqueous solution of fluorosilicate and lead fluorosilicate, with a total fluorosilicate concentration of 160 g / L and an electrolyte temperature of 45℃. The electrolyte circulation rate is 30 L / min. The current density is 200 A / m³. 2The amount of composite additive used is 0.1 g / L. The anode slag is processed through a reverberatory furnace to produce reflective crude lead and matte. The lead content in the reflective crude lead is 26.08%, and the copper content in the matte is 11.07%. The slag is returned to the side-blown reduction furnace for recycling. (6) The anode plate and anode sheet pass through the electrolytic cell to precipitate lead and anode mud, and recover lead ingots; the precipitated lead yields lead ingot products with a lead grade of 85.67%; (7) Electrolytic anode slag is processed through a reverberatory furnace to produce reflective crude lead, matte, and slag. The lead ingot grade is 92.87%. (8) Anode slime and refining slag are processed through a silver reverberatory furnace and a precious lead furnace to recover gold and silver. The main chemical components and mass percentages are as follows: silver in silver ingots 96.58%; gold anode slime 79.15%. (9) The treated lead smelting hazardous waste slag is transformed into general solid waste and reused as building material resources. In step (2), the flue gas undergoes desulfurization, and the recovered dust is returned to the oxidation furnace for smelting. The main chemical components and mass percentages of the dust are: lead 44.21%, zinc 5.01%, copper 0.10%, and sulfur 0.20%. The main chemical components and mass percentages of the flue dust in step (3) are: lead 15.07%, zinc 2.01%, copper 0.10%, sulfur 0.20%. The main chemical components and mass percentages of the waste residue are: lead 0.01%, zinc 0.01%, copper 0.012%, iron 0.60%, gold 0.001g / t, silver 0.001g / t. Comparative Example 1 This embodiment is another example of the resource utilization method for hazardous waste residue from lead-zinc smelting according to the present invention. The smelting waste residue comes from a smelter in Jiangxi Province. Unlike the embodiment, the smelting waste residue in the comparative example was not treated with ultrasound, and gelatin was used as an additive in the electrolysis process. The specific steps include the following: (1) Lead smelting hazardous waste slag is fed into a bottom-blown oxidation furnace for smelting, producing primary crude lead, matte, high-lead slag, fly ash, and SO2 flue gas. Among them, the main chemical composition and mass percentage of the smelting hazardous waste slag are: lead 55.48%, zinc 5.76%, copper 1.57%, iron 18.69%, gold 51.87 g / t, silver 188.02 g / t; of which matte is 8.51%; (2) In step (1), the high-lead slag is reduced and smelted in a side-blown reduction furnace to obtain secondary crude lead, reducing slag, and flue ash; the valuable metal component of the reducing slag is mainly zinc, which enters the fuming furnace to produce secondary zinc oxide and fuming furnace slag, with a zinc grade of 14.67%. The oxygen concentration in the side-blown furnace is 60%, and the gas supply pressure is 0.25 MPa. Pulverized coal in the side-blown furnace is used as fuel and reducing agent, with -0.074 mm accounting for 85% and a moisture content of 1.0%. (3) The reducing residue in step (2) is fed into the fuming furnace to produce secondary zinc oxide product; (4) Primary and secondary crude lead are mixed and electrolyzed in the anode furnace of the electrolysis workshop. The electrolyte consists of an aqueous solution of fluorosilicate and lead fluorosilicate, with a total fluorosilicate concentration of 160 g / L and an electrolyte temperature of 45℃. The electrolyte circulation rate is 30 L / min. The current density is 200 A / m³. 2 The amount of composite additive used is 0.1 g / L. The anode slag is processed through a reverberatory furnace to produce reflective crude lead and matte. The lead content in the reflective crude lead is 26.08%, and the copper content in the matte is 11.07%. The slag is returned to the side-blown reduction furnace for recycling. (5) The anode plate and anode sheet pass through the electrolytic cell to precipitate lead and anode mud, and recover lead ingots; the precipitated lead yields lead ingot products with a lead grade of 85.67%; (6) Electrolytic anode slag is processed through a reverberatory furnace to produce reflective crude lead, matte, and slag. The lead ingot grade is 92.87%. (7) Anode slime and refining slag are processed through a silver reverberatory furnace and a precious lead furnace to recover gold and silver. The silver content in the silver ingots is 96.58%; the gold anode slime is 79.15%. (8) The treated lead smelting hazardous waste slag is transformed into general solid waste and reused as building material resources. In step (2), the flue gas undergoes desulfurization, and the recovered dust is returned to the oxidation furnace for smelting. The main chemical components and mass percentages of the dust are: lead 44.21%, zinc 5.01%, copper 0.10%, and sulfur 0.20%. In step (3), the main chemical components and mass percentages of the flue dust are: lead 15.07%, zinc 2.01%, copper 0.10%, sulfur 0.20%; and the main chemical components and mass percentages of the waste residue are: lead 0.01%, zinc 0.01%, copper 0.012%, iron 0.60%, gold 0.001g / t, silver 0.001g / t. The above experimental results show that after the resource utilization of hazardous waste residue from lead-zinc smelting is supplemented by microwave field activation treatment, the comprehensive recovery rate of valuable metals Pb and Sb in the hazardous waste residue is increased by replacing lead concentrate with pyrite as a reducing agent. This achieves comprehensive utilization and recycling of resources, while reducing the production cost of enterprises.

Claims

1. A method for the resource utilization of hazardous waste residue from lead-zinc smelting, characterized in that, The main chemical components and mass percentages of the hazardous waste slag from lead-zinc smelting are as follows: lead 40.00%–60.00%, zinc 4.00%–6.00%, copper 0.50%–2.00%, iron 15.00%–20.00%, gold 40.00g / t–60.00g / t, and silver 150.00g / t–250.00g / t. The specific steps are as follows: (1) The smelting hazardous waste residue and the composite microwave absorbing additive are mixed evenly at a ratio of hazardous waste residue: microwave absorbing additive = 1: 0.05 to 0.1 and then fed into a microwave field for activation treatment. The microwave frequency is 4 GHz and the activation time is 10 to 20 min. The composite microwave absorbing additive is a mixture of graphene and carbon black, and the mass mixing ratio is 0.1 to 0.2:

1. (2) The activated materials are fed into the bottom-blown oxidation furnace for smelting, producing primary crude lead, matte, high-lead slag, flue ash and SO2 flue gas; (3) The high-lead slag produced in step (2) is reduced and smelted in a side-blown reduction furnace to obtain secondary crude lead, reducing slag and flue ash. The oxygen concentration in the side-blown reduction furnace is 50% to 60%, the gas supply pressure is 0.2 to 0.25 MPa, the reduction time in the side-blown furnace is 1 to 2 hours, the side-blown reduction furnace uses pulverized coal as fuel and reducing agent, -0.074 mm accounts for 80% to 85%, and the moisture content is 0.5% to 1%. (4) The reducing residue in step (3) is fed into the fuming furnace to produce secondary zinc oxide product; (5) Primary and secondary crude lead are mixed with composite additives and subjected to wet electrolysis to obtain anode plates and anode slag. The electrolyte used in lead electrolysis consists of an aqueous solution of fluorosilicate and lead fluorosilicate, with a total fluorosilicate concentration of 100–160 g / L and a current density of 160 A / m. 2 ~200A / m 2 The electrolyte temperature is 30℃~45℃, the electrolyte circulation rate is 20L / min~30L / min, and the composite additive is a mixture of sorbitol and aloe vera, with 4~6 parts of sorbitol and 1~2 parts of aloe vera, and the amount of composite additive is 0.05~0.5g / L. (6) Lead and anode mud are deposited in the anode plate and cathode plate through the electrolytic cell and recovered to obtain lead ingots; (7) Electrolytic anode slag is passed through a reverberatory furnace to produce reflective crude lead, matte, and molten slag; (8) Gold and silver are recovered from anode mud and refining slag through silver reverberatory furnace and precious lead furnace; (9) The treated lead smelting hazardous waste slag is transformed into general solid waste and utilized as building material resources.

2. The method for resource utilization of hazardous waste residue from lead-zinc smelting according to claim 1, characterized in that, In step (2), the grade of copper matte is 5.00% to 10.00%.

3. The method for resource utilization of hazardous waste residue from lead-zinc smelting according to claim 1, characterized in that, In step (2), the flue dust is desulfurized and returned to the bottom-blown oxidation furnace for smelting. The main chemical components and mass percentages of the flue dust are as follows: Lead 40.00%–50.00%, zinc 5.00%–10.00%, copper 0.001%–0.10%, sulfur 0.001%–0.20%, and the bottom-blown oxidation furnace blowing time is 0.5h–2h.

4. The method for resource utilization of hazardous waste residue from lead-zinc smelting according to claim 1, characterized in that, The flue gas temperature of the side-blown reduction furnace in step (3) is 1100℃~1300℃.

5. A method for resource utilization of hazardous waste residue from lead-zinc smelting according to claim 1, characterized in that, In step (4), the fuming furnace produces secondary zinc oxide, wherein the zinc grade is 10.00% to 15.00%.

6. A method for resource utilization of hazardous waste residue from lead-zinc smelting according to claim 1, characterized in that, In step (6), lead is electrolyzed to obtain lead ingot products, and the lead content in the lead ingots is 80.00% to 98.00%.

7. A method for resource utilization of hazardous waste residue from lead-zinc smelting according to claim 1, characterized in that, In step (7), the lead content in the crude lead is 20.00% to 30.00%; and the copper content in the matte is 5.00% to 15.00%.

8. A method for resource utilization of hazardous waste residue from lead-zinc smelting according to claim 1, characterized in that, The main chemical components and mass percentages of the silver ingot in step (8) are as follows: silver 90.00% to 97.00%; gold anode mud 70.00% to 80.00%.

9. A method for resource utilization of hazardous waste residue from lead-zinc smelting according to claim 1, characterized in that, The main chemical components and mass percentages of the general solid waste residue in step (9) are as follows: lead 0.01% to 0.10%, zinc 0.01% to 20.10%, copper 0.01% to 0.10%, iron 0.50% to 1.00%, gold 0.001g / t to 0.02g / t, and silver 0.001g / t to 0.02g / t.

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