A method for removing organic matter and chlorides from copper-containing materials and its use

Abstract

The application discloses a method for removing organic matters and chlorides from copper-containing materials and application thereof, and belongs to the technical field of copper smelting. The method comprises the following steps: taking copper sulfide materials and anthracite powder, mixing the materials with a binder, uniformly granulating the mixture to obtain raw materials, drying the raw materials, adding the anthracite into a rotary kiln, igniting the anthracite, controlling the content of oxygen in the oxygen-rich air and the air flow to control the roasting temperature of the rotary kiln, controlling the negative pressure of the kiln tail inlet and the kiln head outlet of the rotary kiln, recovering the flue gas generated in the roasting process and processing the flue gas in a dust collection and tail gas treatment system, controlling the inclination angle and the rotating speed of the rotary kiln to make the clinker fall into a grate cooler at the kiln head to be cooled, and removing the broken materials and coal cinder generated in the roasting process by using a vibrating screen after the cooling to complete the removal of the organic matters and the chlorides. The application realizes the comprehensive treatment and recovery of the copper sulfide materials containing the organic matters and the chlorides, and has the characteristics of energy saving, environmental protection and high efficiency.

Description

Technical Field

[0001] This invention belongs to the field of copper smelting technology and relates to a method for removing organic matter and chlorides from copper-containing materials and its application. Background Technology

[0002] Copper is a reddish-purple metal with excellent ductility. It also possesses excellent electrical and thermal conductivity. Copper is one of the non-ferrous metals most closely related to humankind and was one of the earliest metals used by humans. In modern society, copper is an indispensable raw material for industries such as electrical engineering, machinery, manufacturing, transportation, electronics, and military. Among all metals consumed globally, copper ranks third after steel and aluminum. Copper has good ductility and high thermal and electrical conductivity. Therefore, the power, electrical appliance, and electronics industries consume approximately 30% of copper production. Copper can form numerous alloys with other metals, and copper alloys exhibit excellent properties and are used in many industries. Since the 1990s, with the rapid development of China's economy and the rise of its manufacturing industry, the demand for copper in the Chinese market has increased dramatically. Metallurgical and copper processing enterprises inevitably generate copper-containing waste slag during production processes. This waste slag contains little copper but many impurities. Stockpiling this waste slag occupies large amounts of land, causing environmental pollution and becoming a public nuisance. Comprehensive utilization of these waste residues, turning waste into treasure, can not only alleviate the shortage of non-ferrous metal resources and has great economic significance, but also has social significance. It is an issue that the lead and zinc smelting industry should focus on at present.

[0003] Copper sulfide is a byproduct of smelting enterprises' processes for extracting main metals from sulfide minerals, specifically during the purification of raffinate using sodium sulfide. Because copper sulfide is generated in chloride-rich extraction systems, it adsorbs residual extractant, kerosene, and other organic matter from the raffinate during precipitation, along with a large amount of chlorides. Containing significant amounts of heavy metal sulfides and toxic organic matter, copper sulfide is a hazardous waste that can easily cause serious pollution to soil and groundwater if improperly disposed of. Therefore, this type of material requires strict monitoring and treatment.

[0004] Copper sulfide contains a certain amount of copper, and from the perspective of mitigating copper resource depletion and resource recycling, it is a metal resource that can be developed and utilized. Currently, the main method for recovering copper from this type of material is pyrometallurgy. During the production process, copper sulfide containing organic matter releases unpleasant gases during the drying process in a rotary kiln, posing a risk of complaints from nearby residents and businesses. If this copper sulfide is directly fed into a pyrometallurgical copper recovery system, the organic matter adsorbed in the copper sulfide can rapidly volatilize under high-temperature conditions, forming a large amount of organic vapor that accumulates in the upper space of the smelting furnace. If it encounters an open flame, it can cause a flash explosion, resulting in a serious production accident. At the same time, the organic vapor mixes with soot and condenses in the flue, causing the flue to narrow and leading to frequent hot shutdowns of the smelting furnace for ash cleaning, affecting production. Some of the organic vapor can also adhere to the dust collection bags, clogging the micropores of the bags, resulting in poor dust collection efficiency and shortening the service life of the dust collection bags. Furthermore, under the high-temperature conditions of pyrometallurgical processes, the chlorides in the copper sulfide material release chlorine gas in the high-temperature atmosphere, which has a strong corrosive effect on the iron flue water-cooled wall pipes, causing the water-cooled wall pipes to become thinner, leading to rupture and water spraying, which can easily cause major safety accidents.

[0005] Methods for treating chlorine-containing materials can be divided into pyrometallurgical processes and hydrometallurgical processes. Pyrometallurgical processes mainly use rotary kilns and multi-hearth furnaces to volatilize chlorides from chlorine-containing materials at high temperatures, thus achieving dechlorination. This method requires natural gas or heavy oil to provide heat, resulting in high energy consumption and limited application. Hydrometallurgical dechlorination processes have less environmental pollution and lower energy consumption, but they easily generate large amounts of wastewater, making subsequent treatment difficult. Hydrometallurgical dechlorination has poor adaptability to materials containing organic matter, making it difficult to remove these substances. Furthermore, organic matter enters the leachate during operation, requiring additional equipment to separate these substances, increasing production costs.

[0006] Currently, methods for treating materials containing organic matter can be categorized into mechanical concentration, incineration, natural sedimentation, and physicochemical dehydration-chemical solidification. Mechanical concentration primarily relies on equipment such as centrifuges, plate and frame filter presses, and dry cake filters to remove moisture from materials containing organic matter, but it cannot remove the organic matter itself. Natural sedimentation mainly uses drying beds and sludge ponds to naturally dehydrate and air-dry the materials containing organic matter, but the organic matter cannot be removed. Physicochemical dehydration-chemical solidification involves first chemically separating the organic matter from the material after centrifugal dehydration, and then using chemical agents of different properties to physicochemically solidify the material. This method can only remove water and is ineffective in removing organic matter; furthermore, the addition of chemicals may adversely affect subsequent copper smelting processes. Incineration primarily relies on incinerators to burn materials containing organic matter at high temperatures. While this method can effectively remove organic matter, it requires natural gas or heavy oil for high-temperature auxiliary combustion, resulting in high energy consumption and severe pollution.

[0007] Therefore, in order to better utilize the copper resources in copper sulfide materials containing organic matter and chlorides, it is an urgent problem for those skilled in the art to solve the following: how to develop an environmentally friendly and efficient method for removing organic matter and chlorides from copper sulfide materials containing organic matter and chlorides. Summary of the Invention

[0008] In view of this, the present invention provides a method for removing organic matter and chlorides from copper-containing materials and its application.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A method for removing organic matter and chlorides from copper-containing materials includes the following steps:

[0011] (1) Weigh out copper sulfide material containing organic matter and chloride and anthracite powder, add binder, mix evenly, and then granulate to obtain raw material;

[0012] (2) After drying the raw material, add anthracite into the rotary kiln, ignite the anthracite, and control the roasting temperature of the rotary kiln by controlling the oxygen content and air flow in the oxygen-enriched air.

[0013] (3) Control the negative pressure at the kiln tail inlet and the kiln head outlet of the rotary kiln to recover the flue gas generated during the roasting process and put it into the dust collection and tail gas treatment system for treatment; control the tilt angle and rotation speed of the rotary kiln so that the clinker falls from the kiln head outlet into the grate cooler at the kiln head for cooling; after cooling, use a vibrating screen to remove the broken material and slag generated during the roasting process to obtain copper sulfide roasted material with organic matter and chloride removed.

[0014] Furthermore, in step (1), the copper sulfide material containing organic matter and chlorides includes the following components by mass percentage: water 5% to 45%, organic matter 0.5% to 5%, copper 8% to 60%, iron 0.1% to 8%, manganese 1% to 10%, zinc 1% to 16%, lead 5% to 10%, sulfur 5% to 30%, silicon 2.5% to 10%, chlorine 3% to 25%, with the remainder being impurities.

[0015] Furthermore, in step (1), the total mass of the copper sulfide material containing organic matter and chloride and the anthracite powder is 75% to 95% and 5% to 25% of the copper sulfide material containing organic matter and chloride.

[0016] The beneficial effects of adopting the above-mentioned further technical solutions are: the mixing of anthracite into copper sulfide material provides a heat source and reducing atmosphere for subsequent roasting to remove chlorine.

[0017] Furthermore, in step (1), the binder is one or a mixture of several of calcium hydroxide, calcium oxide, calcium carbonate, silicon dioxide or water glass.

[0018] The beneficial effects of adopting the above-mentioned further technical solutions are: the addition of binder provides a binding effect when copper sulfide material and anthracite powder are pelletized.

[0019] Furthermore, in step (1), the amount of the above-mentioned binder added is 0.1% to 2% of the total mass of copper sulfide material containing organic matter and chloride and anthracite powder.

[0020] The beneficial effects of adopting the above-mentioned further technical solutions are: the amount of binder used ensures the strength of the pellets and prevents them from breaking during the calcination process.

[0021] Furthermore, in step (2), the raw material is dried to a moisture content of 2.5% to 20%, the amount of anthracite added is 5% to 15% of the raw material mass, the oxygen content in the oxygen-enriched air is 30% to 80%, and the air flow rate is 1000 m³ / h. 3 / h~2000m 3 / h, the firing temperature of the rotary kiln is 800℃~1200℃.

[0022] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: Oxygen-enriched air enables more complete combustion of anthracite in the raw material, while reducing the heat carried away by nitrogen in the air. The heat released during the combustion of anthracite causes the volatile chlorides in the copper sulfide material to volatilize, and at the same time, it causes sintering of the substances in the copper sulfide material, which is beneficial to improving the strength of the clinker. The carbon monoxide released during the combustion of anthracite provides a reducing chlorination roasting environment, causing the non-volatile chlorides in the copper sulfide material to react with other substances to form volatile substances that escape.

[0023] Furthermore, in step (3), the negative pressure at the kiln tail inlet of the rotary kiln is 180Pa to 400Pa, the negative pressure at the kiln head outlet is 40Pa to 150Pa, the tilt angle of the rotary kiln is 0.5° to 3°, the rotation speed of the rotary kiln is 1.0 to 5r / min, and the time for the clinker to fall from the kiln head outlet into the grate cooler at the kiln head is controlled to be 0.5h to 2.0h.

[0024] The beneficial effects of adopting the above-mentioned further technical solutions are as follows: the negative pressure at the kiln tail is higher than that at the kiln head, ensuring that all chlorides emitted by the copper sulfide material can enter the dust collection system for recovery. The tilt angle and rotation speed of the rotary kiln ensure that the residence time of the raw material in the high-temperature zone within the rotary kiln meets the requirements.

[0025] Furthermore, in step (3), the temperature is cooled to below 100°C.

[0026] The beneficial effects of adopting the above-mentioned further technical solutions are: the grate cooler at the kiln head keeps the temperature of the calcined clinker below the ignition point, preventing the clinker from reigniting and avoiding damage to the conveyor belt due to high clinker temperature.

[0027] The present invention also provides an application of the above-described method for removing organic matter and chlorides from copper-containing materials in the recovery of copper in a pyrometallurgical copper smelting system.

[0028] Furthermore, the application of the above-mentioned method for removing organic matter and chlorides from copper-containing materials in the recovery of copper in a pyrometallurgical copper smelting system includes mixing the obtained crushed material and slag, granulating and drying them, and then feeding them into the pyrometallurgical copper smelting system to recover copper.

[0029] The beneficial effects of this invention are: the method of this invention can process copper sulfide materials containing organic matter and chlorides in batches. Although copper sulfide materials containing organic matter and chlorides can spontaneously combust under high-temperature and oxygen-enriched conditions, the organic matter content is low and easily volatilized at high temperatures, making it difficult to form sustained and effective combustion, and even less able to provide a stable high-temperature heat source for removing organic matter and chlorides from the copper sulfide materials. In this invention, anthracite powder is added to the copper sulfide materials for granulation. Under high-temperature and oxygen-enriched conditions, the anthracite powder in the raw material and the anthracite particles added together burn, providing a stable heat source for the interior and exterior of the raw material, causing the organic matter in the copper sulfide materials to volatilize and escape at high temperatures, and then completely burn in the oxygen-enriched air, achieving the purpose of preventing the formation of dioxins. At the same time, under high-temperature conditions, the chlorides in the copper sulfide materials can undergo chlorination roasting reactions with the valuable metal compounds such as lead and zinc contained therein, forming more volatile zinc chloride and lead chloride vapors that escape from the green pellets, achieving the purpose of enrichment and recovery in the dust collection system. Furthermore, the pores formed after the combustion of anthracite powder in the raw material facilitate the escape of these substances. This method also utilizes the high-temperature environment of the rotary kiln to partially oxidize the copper sulfide in the copper sulfide material, which is beneficial for adjusting the grade of copper matte during pyrometallurgical smelting. Moreover, under high-temperature oxidation conditions, the iron in the copper sulfide material and the calcium in the binder can react with the silicon in the copper sulfide material to form a low-melting-point eutectic, binding the copper sulfide material into blocks and ensuring smooth operation of the pyrometallurgical copper smelting furnace. The slag formed after the combustion of anthracite is an excellent auxiliary material for pyrometallurgical copper smelting. After being granulated together with the scrap produced throughout the roasting process, it can be directly fed into the pyrometallurgical copper smelting system, achieving the goal of fully utilizing and conserving resources. This method achieves the comprehensive treatment and recycling of copper sulfide material containing organic matter and chlorides, and is characterized by energy saving, environmental protection, and high efficiency. Detailed Implementation

[0030] The technical solutions in the embodiments of the present invention will be clearly and completely described below. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] Example 1

[0032] A method for removing organic matter and chlorides from copper-containing materials includes the following steps:

[0033] (1) Weigh 780 kg of copper sulfide material containing organic matter and chloride and 220 kg of anthracite powder, add calcium hydroxide, mix evenly and granulate to obtain raw material. The copper sulfide material containing organic matter and chloride contains the following components by mass percentage: water 8%, Cu 37%, Fe 2%, Mn 1.8%, Zn 9.15%, Pb 9%, S 16%, Si 3%, Cl 11%, organic matter 2%, other impurities 1.05%, and the amount of calcium hydroxide added is 0.4% of the total mass of the copper sulfide material containing organic matter and chloride and the anthracite powder.

[0034] (2) The obtained raw material is dried to a moisture content of 2.5%, and 55 kg of anthracite is added to the rotary kiln. After the anthracite is ignited, the roasting temperature of the rotary kiln is controlled by controlling the oxygen content and air flow rate in the oxygen-enriched air. The oxygen content in the oxygen-enriched air is 30%, and the air flow rate is 1000 m³ / h. 3 / h, the firing temperature of the rotary kiln is 850℃;

[0035] (3) Control the negative pressure at the kiln tail inlet and the kiln head outlet of the rotary kiln. The negative pressure at the kiln tail inlet is 190 Pa, and the negative pressure at the kiln head outlet is 40 Pa. The flue gas generated during the roasting process is recycled and treated by the dust collection and tail gas treatment system. Control the tilt angle of the rotary kiln to 0.5° and the rotation speed of the rotary kiln to 1.0 r / min, so that the clinker falls from the kiln head outlet into the grate cooler at the kiln head for cooling after 2.0 h. After cooling to 100°C, use a vibrating screen to remove the broken material and slag generated during the roasting process to obtain copper sulfide roasted material containing chloride and organic matter. Mix the obtained broken material and slag, granulate and dry them, and then put them into the pyrometallurgical system to recover copper.

[0036] Example 2

[0037] A method for removing organic matter and chlorides from copper-containing materials includes the following steps:

[0038] (1) Weigh 800 kg of copper sulfide material containing organic matter and chloride and 200 kg of anthracite powder, add calcium oxide and mix evenly to obtain raw material. The copper sulfide material containing organic matter and chloride contains the following components by mass percentage: water 12%, Cu 33%, Fe 4%, Mn 3.7%, Zn 6.40%, Pb 7%, S 14%, Si 7%, Cl 9%, organic matter 3%, other impurities 0.9%. The amount of calcium oxide added is 1.0% of the total mass of the copper sulfide material containing organic matter and chloride and the anthracite powder.

[0039] (2) The obtained raw material is dried to a moisture content of 5%, and 80 kg of anthracite is added to the rotary kiln. After the anthracite is ignited, the roasting temperature of the rotary kiln is controlled by controlling the oxygen content and air flow rate in the oxygen-enriched air. The oxygen content in the oxygen-enriched air is 45%, and the air flow rate is 1300 m³ / h. 3 / h, the firing temperature of the rotary kiln mentioned above is 950℃;

[0040] (3) Control the negative pressure at the kiln tail inlet and the kiln head outlet of the rotary kiln. The negative pressure at the kiln tail inlet is 240 Pa, and the negative pressure at the kiln head outlet is 70 Pa. The flue gas generated during the roasting process is recycled and treated by the dust collection and tail gas treatment system. Control the tilt angle of the rotary kiln to 1.2° and the rotation speed of the rotary kiln to 2.0 r / min, so that the clinker falls from the kiln head outlet into the grate cooler at the kiln head for cooling after 1.5 hours. After cooling to 100°C, use a vibrating screen to remove the broken material and slag generated during the roasting process to obtain copper sulfide roasted material containing chloride and organic matter. Mix the obtained broken material and slag, granulate and dry them, and then feed them into the pyrometallurgical copper smelting system to recover copper.

[0041] Example 3

[0042] A method for removing organic matter and chlorides from copper-containing materials includes the following steps:

[0043] (1) Weigh 870 kg of copper sulfide material containing organic matter and chloride and 130 kg of anthracite powder, add calcium oxide and mix evenly, then granulate to obtain raw material. The copper sulfide material containing organic matter and chloride contains the following components by mass percentage: water 10.75%, Cu element 25.81%, Fe element 4.3%, Mn element 5.1%, Zn element 14.02%, Pb element 6.3%, S element 5%, Si element 8%, Cl element 15%, organic matter 3.5%, other impurities 2.22%, and the amount of calcium oxide added is 1.2% of the total mass of the copper sulfide material containing organic matter and chloride and the anthracite powder.

[0044] (2) The obtained raw material is dried to a moisture content of 6%, and 120 kg of anthracite is added to the rotary kiln. After the anthracite is ignited, the roasting temperature of the rotary kiln is controlled by controlling the oxygen content and air flow rate in the oxygen-enriched air. The oxygen content in the oxygen-enriched air is 55%, and the air flow rate is 1500 m³ / h. 3 / h, the firing temperature of the rotary kiln is 1050℃;

[0045] (3) Control the negative pressure at the kiln tail inlet and the kiln head outlet of the rotary kiln. The negative pressure at the kiln tail inlet is 300 Pa, and the negative pressure at the kiln head outlet is 90 Pa. The flue gas generated during the roasting process is recycled and treated in the dust collection and tail gas treatment system. Control the tilt angle of the rotary kiln to 1.8° and the rotation speed of the rotary kiln to 2.5 r / min, so that the clinker falls from the kiln head outlet into the grate cooler at the kiln head for cooling after 1.0 h. After cooling to 100°C, use a vibrating screen to remove the broken material and slag generated during the roasting process to obtain copper sulfide roasted material containing chloride and organic matter. Mix the obtained broken material and slag, granulate and dry them, and then feed them into the pyrometallurgical copper smelting system to recover copper.

[0046] Example 4

[0047] A method for removing organic matter and chlorides from copper-containing materials includes the following steps:

[0048] (1) Weigh 900 kg of copper sulfide material containing organic matter and chloride and 100 kg of anthracite powder, add calcium oxide and mix evenly to obtain raw material. The copper sulfide material containing organic matter and chloride contains the following components by mass percentage: water 11%, Cu element 20%, Fe element 5.2%, Mn element 7.4%, Zn element 15.87%, Pb element 5.1%, S element 7%, Si element 5%, Cl element 18%, organic matter 4.8%, other impurities 0.63%, and the amount of calcium oxide added is 1.8% of the total mass of copper sulfide material containing organic matter and chloride and anthracite powder.

[0049] (2) The obtained raw material is dried to a moisture content of 7.1%, and 150 kg of anthracite is added to the rotary kiln. After the anthracite is ignited, the roasting temperature of the rotary kiln is controlled by controlling the oxygen content and air flow rate in the oxygen-enriched air. The oxygen content in the oxygen-enriched air is 65%, and the air flow rate is 1800 m³ / h. 3 / h, the firing temperature of the rotary kiln is 1100℃;

[0050] (3) Control the negative pressure at the kiln tail inlet and the kiln head outlet of the rotary kiln. The negative pressure at the kiln tail inlet is 360 Pa, and the negative pressure at the kiln head outlet is 110 Pa. The flue gas generated during the roasting process is recycled and treated by the dust collection and tail gas treatment system. Control the tilt angle of the rotary kiln to 2.4° and the rotation speed of the rotary kiln to 3.0 r / min, so that the clinker falls from the kiln head outlet into the grate cooler at the kiln head for cooling after 0.6 h. After cooling to 100°C, use a vibrating screen to remove the broken material and slag generated during the roasting process to obtain copper sulfide roasted material containing chloride and organic matter. Mix the obtained broken material and slag, granulate and dry them, and then feed them into the pyrometallurgical copper smelting system to recover copper.

[0051] Table 1. Comparison of dechlorination effects of copper sulfide materials before and after removal of organic matter and chloride in Examples 1-4.

[0052]

[0053] The description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A method for removing organic matter and chlorides from copper-containing materials, characterized in that, Includes the following steps: (1) Weigh out copper sulfide material containing organic matter and chloride and anthracite powder, add binder and mix evenly, then granulate to obtain raw material; (2) After drying the raw material, add anthracite into the rotary kiln, ignite the anthracite, and control the roasting temperature of the rotary kiln by controlling the oxygen content and air flow in the oxygen-enriched air. (3) Control the negative pressure at the kiln tail inlet and the kiln head outlet of the rotary kiln, and recover the flue gas generated during the roasting process to enter the dust collection and tail gas treatment system for treatment; control the tilt angle and rotation speed of the rotary kiln so that the clinker falls from the kiln head outlet into the grate cooler at the kiln head for cooling. After cooling, a vibrating screen is used to remove the debris and slag produced during the roasting process, resulting in copper sulfide roasted material with organic matter and chloride removed; In step (2), the raw material is dried to a moisture content of 2.5%–20%, the amount of anthracite added is 5%–15% of the raw material mass, the oxygen content in the oxygen-enriched air is 30%–80%, and the air flow rate is 1000 m³ / s. 3 / h~2000 m 3 / h, the firing temperature of the rotary kiln is 800℃~1200℃.

2. The method for removing organic matter and chloride from copper-containing materials according to claim 1, characterized in that, In step (1), the copper sulfide material containing organic matter and chloride includes the following components by mass percentage: water 5% to 45%, organic matter 0.5% to 5%, copper 8% to 60%, iron 0.1% to 8%, manganese 1% to 10%, zinc 1% to 16%, lead 5% to 10%, sulfur 5% to 30%, silicon 2.5% to 10%, chlorine 3% to 25%, and the balance being impurities.

3. The method for removing organic matter and chlorides from copper-containing materials according to claim 1, characterized in that, In step (1), the total mass of the copper sulfide material containing organic matter and chloride and the anthracite powder is 75% to 95% and 5% to 25% of the copper sulfide material containing organic matter and chloride.

4. The method for removing organic matter and chloride from copper-containing materials according to claim 1, characterized in that, In step (1), the binder is one or a mixture of several of calcium hydroxide, calcium oxide, calcium carbonate, silicon dioxide or water glass.

5. The method for removing organic matter and chloride from copper-containing materials according to claim 1, characterized in that, In step (1), the amount of binder added is 0.1% to 2% of the total mass of copper sulfide material containing organic matter and chloride and anthracite powder.

6. The method for removing organic matter and chloride from copper-containing materials according to claim 1, characterized in that, In step (3), the negative pressure at the kiln tail inlet of the rotary kiln is 180 Pa to 400 Pa, the negative pressure at the kiln head outlet is 40 Pa to 150 Pa, and the tilt angle of the rotary kiln is 0.

5. o ~3 o The rotary kiln speed is 1.0 to 5 r / min, and the time for clinker to fall from the discharge port at the kiln head into the grate cooler at the kiln head is controlled to be 0.5 h to 2.0 h.

7. The method for removing organic matter and chlorides from copper-containing materials according to claim 1, characterized in that, In step (3), the temperature is cooled to below 100°C.

8. The application of the method for removing organic matter and chlorides from copper-containing materials as described in any one of claims 1-7 in the recovery of copper in a pyrometallurgical copper smelting system.

9. The application of the method for removing organic matter and chlorides from copper-containing materials according to claim 8 in copper recovery in a pyrometallurgical copper smelting system, characterized in that, This includes mixing and granulating the obtained crushed material and slag, drying it, and then feeding it into a pyrometallurgical copper smelting system to recover copper.

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