Method for efficiently removing arsenic matte impurities, recovering copper and enriching arsenic in short process

Abstract

The invention provides a method for efficiently removing arsenic matte impurities and recovering copper and enriching arsenic in a short process, and relates to the technical field of metallurgy. Comprising the following steps: S1, preparing materials; s2, the arsenic matte is continuously put into a converter, quartz sand is matched, after the base material is put, natural gas and oxygen are introduced for heating smelting, and after the material is completely melted, oxygen-enriched air is introduced for deslagging and arsenic removal; s3, after deslagging is completed, limestone is added to remove arsenic, the arsenic content is reduced to about 2%, and then the molten copper is discharged to complete smelting; according to the treatment method, the technological process is short, treatment is efficient, high-arsenic matte is recycled in a targeted mode, lead, antimony, arsenic, copper and the like in the high-arsenic matte are recycled in a classified mode and then reused, meanwhile, low-sulfur smelting is adopted, sulfur-containing flue gas generated in the smelting process can be removed through a follow-up desulfurization device, lead enters slag, arsenic and antimony enter the flue gas, and the sulfur-containing flue gas is recycled. And classified recycling is achieved.

Description

Technical Field

[0001] The present application relates to the field of metallurgical technology, and in particular to a method for removing arsenic matte impurities and recovering copper to enrich arsenic through a high-efficiency and short-process process. Background Art

[0002] Lead matte is the product of crude refining of various copper-containing slags from lead smelting plants. Lead smelters typically sell this matte after simple processing. High-sulfur matte is known as high-sulfur matte, while high-arsenic matte is known as high-arsenic matte. Because high-arsenic matte contains excessively high arsenic, it is difficult to process and lacks effective recycling methods. Therefore, green processing is required to reduce the content of harmful substances.

[0003] Generally speaking, matte, also known as copper matte, is a melt of Cu2S and FeS. The current mainstream copper matte blowing process is mainly divided into two stages. The first is the slagging stage, in which FeS reacts with oxygen in the oxygen-rich air to form FeO, and then FeO reacts with the added calcium-containing flux to form fayalite (2FeO·SiO2) slag, which is discharged regularly; the second stage is the copper making stage, in which oxygen-rich air is continued to be blown into the melt, oxygen reacts with Cu2S to form Cu2O and SO2, and Cu2O reacts with unreacted Cu2S to form Cu and SO2; the mainstream process is to incorporate arsenic matte into the matte smelting line for blowing. Since the copper in arsenic matte itself is high-quality elemental copper and cuprous, incorporating it into the original blowing line for recovery not only wastes energy through repeated smelting, but the harmful substance arsenic will also enter the subsequent treatment equipment with the flue gas, making it impossible to dispose of it in a targeted manner, further exacerbating the treatment risk.

[0004] In view of this, the present application aims to provide a method for removing arsenic matte impurities and recovering copper-enriched arsenic in an efficient and short process, so as to better solve the above technical problems. Summary of the Invention

[0005] The purpose of the embodiments of the present application is to provide a method for removing arsenic matte impurities with high efficiency and short process and recovering copper-enriched arsenic, which can solve the technical problem of recycling and treating arsenic matte.

[0006] The present invention provides a method for removing arsenic matte impurities and recovering copper-enriched arsenic in a highly efficient and short process, comprising the following steps:

[0007] S1. Prepare the materials, crush and screen the arsenic matte to control the particle size range to 10-50mm, and prepare quartz sand and limestone materials. The quartz sand must have a silica content of more than 85%, and the limestone must have a calcium carbonate content of more than 90%;

[0008] S2. Arsenic matte is continuously fed into the converter and mixed with quartz sand. After the bottom material is fed in, natural gas and oxygen are introduced for heating and smelting. The converter is tiltable and the converter lining is made of high-temperature-resistant and corrosion-resistant magnesium-chromium refractory materials. When the arsenic matte is fed in, it is precisely metered with a metering belt and transported to a scraper feeder for uniform feeding. The feeding speed is controlled at 1-3t / min. After metering, the quartz sand is evenly fed into the converter by a scraper feeder. Natural gas and oxygen are introduced into the converter through a burner. The burner is set at a variable angle and is arranged above the liquid surface. The angle is adjusted according to the requirements of the molten pool. The combustion flame blown in directly heats the material or melt. Heat arc reflection and radiation reaction continue to occur in the furnace to achieve heat conduction at each point. The flow rate of the mixed gas is controlled at 400-500m 3 / h to achieve oxidation and smelting effects, and in the melting process, continuous air is blown in, and slag is discharged every 7-9 hours, and the flow rate is controlled at 500-1200m through 2-4 air guns. 3 / h, the temperature is maintained at 750℃-850℃, and the process continues until there is no obvious solid slag on the surface of the melt. During this process, arsenic in the melt continues to volatilize with the flue gas, and the arsenic content in the melt drops to below 5%.

[0009] S3. after deslagging is complete, limestone is added to remove arsenic, and the temperature is gradually raised to 930-960 ℃, the temperature is maintained until the arsenic content is reduced to about 2%, the surface scum is removed, the upper copper oxide liquid is discharged, and then the copper liquid is discharged to complete the smelting. When this step adds limestone, an automatic charging device is adopted, and the adding speed is controlled at 0.5-2t / h. The temperature-raising process adopts a step-by-step heating method, first at a rate of 10-20 ℃ / h to 800 ℃, then at a rate of 5-10 ℃ / h to 930-960 ℃, and in the process of maintaining the temperature, 2-4 air guns are passed into and blown into a flow rate controlled at 500-1500m 3 / h oxygen-enriched air, and the arsenic content in the melt is monitored in real time using a spectrometer. When the arsenic content drops to about 2%, heating is stopped, and the upper slag is released first, then the surface copper oxide liquid is released, and finally the copper liquid is released. When releasing the copper liquid, the copper is poured out by rotating.

[0010] Furthermore, in step S2, the amount of arsenic matte added is 110t-130t, and the initial amount is 40-60t; when adding for the first time, it is added in 2-3 times, with each addition amount being 20-30t, 10-20t, and 10-20t respectively, and the interval time for each addition is 10-20 minutes, so that the material can be fully preheated and initially reacted to avoid local overheating or uneven reaction.

[0011] Furthermore, in step S2, the total amount of quartz sand added is 10%-24% of the total mass of the arsenic matte added; the quartz sand is added in 3-4 times, and the amount added each time accounts for 25%-35% of the total amount, and the interval time between each addition is 30-60 minutes, so that the quartz sand can be fully mixed and reacted with the arsenic matte, and gradually form a good slag structure, which is conducive to impurity separation.

[0012] Furthermore, in step S2, the smelting temperature is 700°C-900°C; during the smelting process, real-time temperature monitoring is performed by setting multiple thermocouples at different positions on the converter wall, and the number of temperature monitoring points is 6-8, which are evenly distributed on the converter wall; according to the monitored temperature data, an intelligent temperature control system is used to automatically adjust the amount of natural gas and oxygen introduced to ensure that the temperature is stable within the range of 700°C-900°C, and the temperature fluctuation range is controlled within ±10°C to ensure the stability of the smelting process and the reaction effect.

[0013] Furthermore, in step S2, the ratio of oxygen to natural gas is controlled at 1.6-2.0:1. In this step, the amount of oxygen and natural gas introduced is precisely controlled by a gas flow meter with an accuracy of ±0.5%. During the combustion process, the ratio of oxygen to natural gas is dynamically adjusted according to the combustion conditions in the converter and the progress of the smelting reaction. In the early stage of smelting, when the reaction is more intense, the ratio of oxygen to natural gas is appropriately reduced to 1.6-1.8:1. In the later stage of smelting, when the reaction tends to be stable, the ratio of oxygen to natural gas is appropriately increased to 1.8-2.0:1 to achieve the best combustion effect and smelting efficiency.

[0014] Furthermore, in step S3, the amount of limestone added is 8%-28% of the total mass of the arsenic matte; before the limestone is added, it needs to be preheated, and the preheating temperature is controlled at 200-300°C for 30-60 minutes to increase the activity of the limestone and promote its reaction efficiency with arsenic; during the addition of limestone, the amount of oxygen-enriched air introduced into the converter is increased by 100-300m 3 / h to adjust the atmosphere in the melt.

[0015] Furthermore, in step S2, the copper content of the arsenic matte fed into the converter is 25%-42%, the lead content is 4%-20%, the arsenic content is 5%-25%, and the iron content is 20%-40%; before feeding the arsenic matte, the arsenic matte is sampled and analyzed, and the contents of elements such as copper, lead, arsenic, and iron therein are accurately determined by chemical analysis, and the number of sampling points is 5-8, which are evenly distributed in the arsenic matte pile; according to the analysis results, arsenic matte of different compositions are classified, stored and fed, and arsenic matte with a higher copper content is given priority to be fed into the converter to improve the copper recovery rate; for arsenic matte with a higher arsenic content, the subsequent arsenic removal process parameters are appropriately adjusted to ensure that the arsenic can be effectively removed.

[0016] Furthermore, in step S3, the crude copper produced in the smelting process is sent to the electrolysis system and recovered by electrolysis treatment on the anode furnace casting plate; the soot produced in the smelting process is sent to the arsenic-antimony separation system for treatment and used to produce arsenic products; the slag produced in the smelting process is sent to the lead treatment system and used for batching the lead smelting system; the crude copper is sent to the electrolysis system to produce electrolytic copper; the soot is sent to the arsenic-antimony separation system, which adopts a pyrometallurgical process, utilizes the easy slag formation of arsenic and alkali, and uses sodium hydroxide to form slag with arsenic in the arsenic-antimony mixture melt to achieve effective separation of arsenic and antimony; before being sent to the lead treatment system, the slag is crushed and screened to make its particle size meet the batching requirements of the lead smelting system, and the particle size range is controlled to be 5-30 mm.

[0017] Furthermore, in step S3, the copper content in the blister copper produced during the smelting process is more than 95%, the lead and arsenic content in the slag is 8-12%, and the arsenic content in the fly ash is more than 50%. To ensure product quality, the blister copper, slag and fly ash are regularly sampled and tested, with a sampling frequency of 3-5 times per batch of smelted products. For the blister copper, if the copper content is less than 95%, it needs to be returned to the smelting system for re-refining treatment; for the slag, if the lead and arsenic content exceeds the range of 8-12%, it needs further treatment; for the fly ash, if the arsenic content is less than 50%, it needs to be adjusted to improve the arsenic recovery rate.

[0018] Beneficial effects of the present invention:

[0019] The treatment method provided by the present invention has a short process flow and efficient treatment. It can specifically recycle and utilize high-arsenic matte, so that lead, antimony, arsenic, copper, etc. therein can be classified and recovered for reuse. The treatment method provided by the present invention is low-sulfur smelting. The sulfur-containing flue gas generated during the smelting process can be removed by a subsequent desulfurization device. During the smelting process, lead enters the slag, and arsenic and antimony enter the flue gas, which are classified and recycled. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0021] Figure 1 It is a processing flow diagram of the present invention. DETAILED DESCRIPTION

[0022] To facilitate understanding of the present invention, the present invention will be described more fully below through examples, with preferred embodiments of the present invention provided below. However, the present invention can be implemented in a variety of different forms and is not limited to the embodiments described herein. Any other embodiments obtained by modifying or equivalently replacing the technical solution of the present invention without inventive results are within the scope of protection of the present invention.

[0023] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art of the present invention. The terms used in the specification of the present invention are only for describing specific embodiments and are not intended to limit the present invention.

[0024] The numerical values disclosed in the embodiments of the present invention are approximate values, not definite values. Where errors or experimental conditions permit, all values within the error range may be included without being limited to the specific numerical values disclosed in the embodiments of the present invention.

[0025] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.

[0026] Example 1

[0027] See also Figure 1 As shown, this embodiment provides a method for removing arsenic matte impurities and recovering copper-enriched arsenic in a highly efficient and short process, comprising the following steps:

[0028] S1. Prepare materials, including arsenic matte (Cu28.00wt%, Pb 4wt%, As 15wt%, Fe20wt%), quartz flux (SiO286.00wt%), and limestone (CaCO392.00wt%);

[0029] S2. Add 25 tons of arsenic matte and 1.3 tons of quartz solvent into the converter and blow and melt. During this period, use an oxygen tube to probe the furnace. If copper liquid is found in the furnace, set up an air duct for blowing (the air duct is made of stainless steel and protected by a uniform mixture of magnesium mud, refractory mud, glass water, and cement). The whole process takes about 2-4 hours, and the oxygen pressure is 600Nm 3 / h, natural gas 300Nm 3 / h, the air inlet pressure in the air duct is 0.2-0.4MPa, the charge melts to the furnace mouth, and the charging operation begins. 3-5t of cold charge is added each time, and 50Kg of quartz is added per ton. After 2-3 hours, the slag is discharged after the cold charge is completely melted. The slag is discharged every 8 hours. During the slag discharge, the natural gas and oxygen intake are reduced to 30%, and then adjusted back to the original level after the slag discharge is completed. The charging operation is repeated until the total charge reaches 125t;

[0030] S3. After the last feeding and slag discharge, copper making operation is carried out. 100 kg of limestone is added every 2 hours. The upper copper oxide and slag are discharged regularly. The copper making period is about 70-80 hours. After the copper making is completed, the air duct is pulled out and the copper discharge operation is carried out.

[0031] In this embodiment, according to production data statistics, the amount of copper metal fed into the furnace is 35 tons, and 25.50 tons of blister copper (Cu 96.23 wt%, As 1.5 wt%) is produced, the direct copper recovery rate is 70.11%, and the arsenic removal rate is 98%.

[0032] Example 2

[0033] See also Figure 1 As shown, this embodiment provides a method for removing arsenic matte impurities and recovering copper-enriched arsenic in a highly efficient and short process, comprising the following steps:

[0034] S1. Prepare materials, including arsenic matte (Cu36.00wt%, Pb 9.2wt%, As 13wt%, Fe24wt%), quartz flux (SiO286.00wt%), and limestone (CaCO392.00wt%);

[0035] S2. Add 50 tons of arsenic matte and 1.5 tons of quartz solvent into the converter and blow and melt. During this period, use an oxygen tube to probe the furnace. If copper liquid is found in the furnace, set up an air duct for blowing (the air duct is made of stainless steel and protected by a uniform mixture of magnesium mud, refractory mud, glass water, and cement). The whole process takes about 2-4 hours, and the oxygen pressure is 600Nm 3 / h, natural gas 300Nm 3 / h, the air inlet pressure in the air duct is 0.2-0.4MPa, the charge is melted to the furnace mouth, and the charging operation begins. Each time 3-5t of cold charge is added, and 100Kg of quartz is added per ton. After 2-3 hours, the slag is discharged after the cold charge is completely melted. The slag is discharged every 8 hours. During the slag discharge, the natural gas and oxygen intake are reduced to 30%, and then adjusted back to the original level after the slag discharge is completed. The charging operation is repeated until the total charge reaches 120t. The temperature is maintained at 800-950℃ during the charging and melting period.

[0036] S3. After the last feeding and slag discharge, copper making operation is carried out. 70 kg of limestone is added every 2 hours. The upper copper oxide and slag are discharged regularly. The copper making period is about 70-80 hours. After the copper making is completed, the air duct is pulled out and the copper discharge operation is carried out.

[0037] In this embodiment, according to production data statistics, the amount of copper metal fed into the furnace was 43.2 tons, and 36.91 tons of blister copper (Cu 95.61 wt%, As 1.7 wt%) was produced, with a direct copper recovery rate of 81.69% and an arsenic removal rate of 96%.

[0038] Example 3

[0039] See also Figure 1 As shown, this embodiment provides a method for removing arsenic matte impurities and recovering copper-enriched arsenic in a highly efficient and short process, comprising the following steps:

[0040] S1. Prepare materials, including arsenic matte (Cu35.00wt%, Pb 7.8wt%, As 17wt%, Fe23wt%), quartz flux (SiO286.00wt%), and limestone (CaCO392.00wt%);

[0041] S2. Add 25 tons of arsenic matte and 1.3 tons of quartz solvent into the converter and blow and melt. During this period, use an oxygen tube to probe the furnace. If copper liquid is found in the furnace, set up an air duct for blowing (the air duct is made of stainless steel and protected by a uniform mixture of magnesium mud, refractory mud, glass water, and cement). The whole process takes about 2-4 hours, and the oxygen pressure is 600Nm 3 / h, natural gas 300Nm 3 / h, the air inlet pressure in the air duct is 0.2-0.4MPa, the charge melts to the furnace mouth, and the charging operation begins. Each time 3-5t of cold charge is added, and 50Kg of quartz is added per ton. After 2-3 hours, the slag is discharged after the cold charge is completely melted. The slag is discharged every 8 hours. During the slag discharge, the natural gas and oxygen intake are reduced to 30%, and then adjusted back to the original level after the slag discharge is completed. The charging operation is repeated until the total charge reaches 127t;

[0042] S3. After the last feeding and slag discharge, copper making operation is carried out. 100 kg of limestone is added every 2 hours. The upper copper oxide and slag are discharged regularly. The copper making period is about 70-80 hours. After the copper making is completed, the air duct is pulled out and the copper discharge operation is carried out.

[0043] In this embodiment, according to production data statistics, the amount of copper metal fed into the furnace is 44.45 tons, 39.86 tons of blister copper (Cu 95.02 wt%, As 2 wt%) is produced, the direct copper recovery rate is 85.21%, and the arsenic removal rate is 97%.

[0044] In the above-mentioned Examples 1-3, the blister copper, mixed slag, and fly ash during the processing are all smelting products, wherein the copper content in the blister copper is more than 95%, the lead and arsenic content in the slag are about 10%, and the arsenic content in the fly ash is more than 50%. The blister copper is sent to the anode furnace for plate electrolysis, the mixed slag is sent to the lead smelting system for batching, and the fly ash is sold to an arsenic processing enterprise to produce arsenic products.

[0045] Compared with the existing technology, the treatment method provided by the present application deeply treats high-arsenic matte and classifies and enriches various valuable metal elements for extraction. The current treatment method for this type of matte is to gradually add arsenic matte into the crude copper anode plate production line in batches in small quantities to produce anode plates. However, no matter which process it is incorporated into, the other types of valuable metals contained therein will either enter the slag or the soot, and cannot be recycled. The harmful element arsenic that enters the soot will reduce the quality of the soot and affect the recycling of the soot. The valuable metals that enter the slag cannot be recycled accordingly. The treatment method provided by the present application can carry out targeted recycling of high-arsenic matte obtained by the treatment of lead smelting enterprises. At the same time, compared with the existing technology, the treatment method provided by the present application is low-sulfur smelting, and the sulfur-containing flue gas generated during the smelting process can be removed by a subsequent desulfurization device. During the smelting process, 85% of the lead enters the slag, and 90% of the arsenic and antimony enter the flue gas and are classified and recycled.

[0046] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. A method for removing arsenic matte impurities and recovering copper-enriched arsenic in a highly efficient and short process, characterized in that: The steps include: S1. Prepare the materials, crush and screen the arsenic matte to control the particle size range to 10-50mm, and prepare quartz sand and limestone materials. The quartz sand must have a silica content of more than 85%, and the limestone must have a calcium carbonate content of more than 90%; S2. Arsenic matte is continuously fed into the converter and mixed with quartz sand. After the bottom material is fed in, natural gas and oxygen are introduced for heating and smelting. The converter is tiltable and the converter lining is made of high-temperature-resistant and corrosion-resistant magnesium-chromium refractory materials. When the arsenic matte is fed in, it is precisely metered with a metering belt and transported to a scraper feeder for uniform feeding. The feeding speed is controlled at 1-3t / min. After metering, the quartz sand is evenly fed into the converter by a scraper feeder. Natural gas and oxygen are introduced into the converter through a burner. The burner is set at a variable angle and is arranged above the liquid surface. The angle is adjusted according to the requirements of the molten pool. The combustion flame blown in directly heats the material or melt. Heat arc reflection and radiation reaction continue to occur in the furnace to achieve heat conduction at each point. The flow rate of the mixed gas is controlled at 400-500m 3 / h to achieve oxidation and smelting effects, and in the melting process, continuous air is blown in, and slag is discharged every 7-9 hours, and the flow rate is controlled at 500-1200m through 2-4 air guns. 3 / h, the temperature is maintained at 750℃-850℃, and the process continues until there is no obvious solid slag on the surface of the melt. During this process, arsenic in the melt continues to volatilize with the flue gas, and the arsenic content in the melt drops to below 5%. S3. after deslagging is complete, limestone is added to remove arsenic, and the temperature is gradually raised to 930-960 ℃, the temperature is maintained until the arsenic content is reduced to about 2%, the surface scum is removed, the upper copper oxide liquid is discharged, and then the copper liquid is discharged to complete the smelting. When this step adds limestone, an automatic charging device is adopted, and the adding speed is controlled at 0.5-2t / h. The temperature-raising process adopts a step-by-step heating method, first at a rate of 10-20 ℃ / h to 800 ℃, then at a rate of 5-10 ℃ / h to 930-960 ℃, and in the process of maintaining the temperature, 2-4 air guns are passed into and blown into a flow rate controlled at 500-1500m 3 / h oxygen-enriched air, and the arsenic content in the melt is monitored in real time using a spectrometer. When the arsenic content drops to about 2%, heating is stopped, and the upper slag is released first, then the surface copper oxide liquid is released, and finally the copper liquid is released. When releasing the copper liquid, the copper is poured out by rotating.

2. The method for removing arsenic matte impurities and recovering copper-enriched arsenic in a high-efficiency short process according to claim 1, characterized in that: In step S2, the amount of arsenic matte added is 110t-130t, and the initial amount is 40-60t. When adding the material for the first time, it is added in 2-3 times, with the amount added each time being 20-30t, 10-20t, and 10-20t respectively. The interval time between each addition is 10-20 minutes to allow the material to be fully preheated and initially reacted to avoid local overheating or uneven reaction.

3. The method for removing arsenic matte impurities and recovering copper-enriched arsenic in a high-efficiency short process according to claim 1, characterized in that: In step S2, the total amount of quartz sand added is 10%-24% of the total mass of the arsenic matte added; the quartz sand is added in 3-4 times, and the amount added each time accounts for 25%-35% of the total amount, and the interval between each addition is 30-60 minutes, so that the quartz sand can be fully mixed and reacted with the arsenic matte, and gradually form a good slag structure to facilitate impurity separation.

4. The method for removing arsenic matte impurities and recovering copper-enriched arsenic in a high-efficiency short process according to claim 1, characterized in that: In step S2, the smelting temperature is 700℃-900℃; during the smelting process, real-time temperature monitoring is performed by setting multiple thermocouples at different positions on the converter wall. The number of temperature monitoring points is 6-8, which are evenly distributed on the converter wall; based on the monitored temperature data, an intelligent temperature control system is used to automatically adjust the amount of natural gas and oxygen introduced to ensure that the temperature is stable within the range of 700℃-900℃, and the temperature fluctuation range is controlled within ±10℃ to ensure the stability of the smelting process and the reaction effect.

5. The method for removing arsenic matte impurities and recovering copper-enriched arsenic in a high-efficiency short process according to claim 1, characterized in that: In step S2, the ratio of oxygen to natural gas is controlled at 1.6-2.0:

1. In this step, the amount of oxygen and natural gas introduced is precisely controlled by a gas flow meter with an accuracy of ±0.5%. During the combustion process, the ratio of oxygen to natural gas is dynamically adjusted based on the combustion conditions in the converter and the progress of the smelting reaction. In the early stages of smelting, when the reaction is more intense, the volume ratio of oxygen to natural gas is appropriately reduced to 1.6-1.8:

1. In the later stages of smelting, when the reaction tends to be stable, the volume ratio of oxygen to natural gas is appropriately increased to 1.8-2.0:1 to achieve optimal combustion effect and smelting efficiency.

6. The method for removing arsenic matte impurities and recovering copper-enriched arsenic in a high-efficiency short process according to claim 1, characterized in that: In step S3, the amount of limestone added is 8%-28% of the total mass of the arsenic matte; before the limestone is added, it needs to be preheated at a temperature of 200-300°C for 30-60 minutes to increase the activity of the limestone and promote its reaction efficiency with arsenic; during the addition of limestone, the amount of oxygen-enriched air introduced into the converter is increased by 100-300m 3 / h to adjust the atmosphere in the melt.

7. The method for removing arsenic matte impurities and recovering copper-enriched arsenic in a high-efficiency short process according to claim 1, characterized in that: In step S2, the copper content of the arsenic matte fed into the converter is 25%-42%, the lead content is 4%-20%, the arsenic content is 5%-25%, and the iron content is 20%-40%; before feeding the arsenic matte, the arsenic matte is sampled and analyzed, and the contents of elements such as copper, lead, arsenic, and iron therein are accurately determined by chemical analysis, and the number of sampling points is 5-8, which are evenly distributed in the arsenic matte pile; according to the analysis results, arsenic matte with different compositions are classified, stored and fed, and arsenic matte with higher copper content is fed into the converter first to improve the copper recovery rate; for arsenic matte with higher arsenic content, subsequent arsenic removal process parameters are appropriately adjusted to ensure that arsenic can be effectively removed.

8. The method for removing arsenic matte impurities and recovering copper-enriched arsenic in a high-efficiency short process according to claim 1, characterized in that: In step S3, the crude copper produced by smelting is sent to the electrolysis system and electrolytically recovered after the anode furnace is cast; the soot produced in the smelting process is sent to the arsenic-antimony separation system for treatment and used to produce arsenic products; the slag produced in the smelting process is sent to the lead treatment system for use as a feed material for the lead smelting system; the crude copper is sent to the electrolysis system to produce electrolytic copper; the soot is sent to the arsenic-antimony separation system, which adopts a pyrometallurgical process, takes advantage of the easy slag formation between arsenic and alkali, and uses sodium hydroxide to form slag with arsenic in the molten arsenic-antimony mixture to achieve effective separation of arsenic and antimony; before being sent to the lead treatment system, the slag is crushed and screened to ensure that its particle size meets the feed material requirements of the lead smelting system, and the particle size range is controlled to be 5-30 mm.

9. The method for removing arsenic matte impurities and recovering copper-enriched arsenic in a high-efficiency short process according to claim 1, characterized in that: In step S3, the blister copper produced during the smelting process contains more than 95% copper, the slag contains 8-12% lead and arsenic, and the fly ash contains more than 50% arsenic. To ensure product quality, the blister copper, slag, and fly ash are regularly sampled and tested, with a sampling frequency of 3-5 times per batch of smelted products. For the blister copper, if the copper content is less than 95%, it needs to be returned to the smelting system for re-refining. For the slag, if the lead and arsenic content exceeds the range of 8-12%, further treatment is required. For the fly ash, if the arsenic content is less than 50%, the arsenic-antimony separation system needs to be adjusted to improve the arsenic recovery rate.

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