Method for recovering copper and diluting matte converting slag through self-heating collaborative smelting

Abstract

The invention provides a method for recovering copper and diluting matte converting slag through self-heating collaborative smelting, and relates to the field of metal recovery. The method comprises the steps that liquid copper matte converting slag generated in the copper smelting process is directly discharged into a hot-state collaborative smelting furnace, multi-source copper-based solid waste subjected to coarse crushing and mixing is added, collaborative smelting is carried out under the oxygen-enriched air condition, and collaborative smelting comprises the melting period, the dilution period and the standing period; in the melting period, copper, aluminum, iron, lead and tin in the copper-based solid waste are quickly melted to form first crude copper; in the depletion period, aluminum and iron in the first crude copper and organic matter in the copper-based solid waste serve as reducing agents to reduce oxides of copper, nickel, cobalt, zinc and lead in the matte converting slag into metal states, the metal states enter the first crude copper to form second crude copper, and after being oxidized, the iron and the aluminum enter the matte converting slag to form second slag; and in the standing period, a reducing agent is added, air blowing is ended, third crude copper and third slag are formed after standing, and a crude copper product is collected.

Description

Technical Field

[0001] This application relates to the field of metal recycling, and particularly to a method for self-heating collaborative smelting to recycle copper and to impoverish matte converting slag. Background Art

[0002] Copper-based waste materials are rich in valuable metals such as copper, tin, gold, and silver. Currently, they are recycled by using either a fully wet leaching method or a pyrometallurgical smelting method, with the pyrometallurgical smelting method being the most widely used.

[0003] Currently, the pyrometallurgical recycling process has high requirements for copper-based waste materials and often requires the addition of slag formers such as lime and hematite. On the other hand, the impoverishment of matte converting slag mainly uses reduction impoverishment or beneficiation impoverishment, with reduction impoverishment being the main method; in the reduction impoverishment process, a reducing agent, a sulfiding agent, and a slag former need to be added simultaneously to achieve better results, and matte is obtained after impoverishment. When directly reducing and impoverishing matte converting slag, the amount of slag is large and the amount of matte is small, making it difficult to separate slag and matte. Summary of the Invention

[0004] The purpose of this application is to provide a method for self-heating collaborative smelting to recycle copper and to impoverish matte converting slag, so as to solve the above problems.

[0005] To achieve the above purpose, this application adopts the following technical solutions: This application provides a method for self-heating collaborative smelting to recycle copper and to impoverish matte converting slag, including: Directly discharging the liquid matte converting slag generated during the copper smelting process into a hot collaborative smelting furnace, adding multi-source copper-based solid waste that has been roughly broken and mixed, and performing collaborative smelting under the condition of oxygen-enriched air. The collaborative smelting includes a melting period, an impoverishment period, and a standing period; During the melting period, copper, aluminum, iron, lead, and tin in the copper-based solid waste quickly melt to form first crude copper; During the impoverishment period, aluminum and iron in the first crude copper and the organic matter in the copper-based solid waste act as reducing agents to reduce the oxides of copper, nickel, cobalt, zinc, and lead in the matte converting slag into a metallic state and enter the first crude copper to form second crude copper, and iron and aluminum are oxidized and enter the matte converting slag to form second slag; During the standing period, a reducing agent is added and blowing is stopped. After standing, third crude copper and third slag are formed and discharged from the copper port and the slag port respectively, and the crude copper product is collected; The first crude copper includes copper, aluminum, iron, lead, and tin; The second crude copper includes copper, lead, tin, nickel, cobalt, and zinc; The third crude copper includes copper, lead, tin, nickel, cobalt, and zinc.

[0006] Optionally, the multi-source copper-based solid waste contains 10-30 wt% copper, and the matte converting slag contains 0.8-5 wt% copper, 45-60 wt% iron, and 25-35 wt% silicon dioxide.

[0007] Among them, the multi-component copper-based solid waste includes slag-forming metals, and the slag-forming metals include iron and aluminum; the content of the slag-forming metals is 5-20 wt% of the multi-source copper-based solid waste; Among them, the calorific value of the multi-source copper-based solid waste is 1.5-1.7 MJ / kg.

[0008] Optionally, the temperature of the co-smelting is 1250-1350 °C.

[0009] Preferably, the temperature of the co-smelting is 1250-1300 °C.

[0010] Optionally, the matte converting slag is 60-500 wt% of the multi-source copper-based solid waste.

[0011] Preferably, the matte converting slag is 100-300% of the multi-source copper-based solid waste.

[0012] Optionally, the concentration of oxygen in the enriched air is 25-40%.

[0013] Optionally, during the co-smelting and depletion period, at least 80 wt% of the copper in the converting slag is reduced and enters the first blister copper to form the second blister copper, and at least 99 wt% of the iron and aluminum in the multi-source copper-based solid waste are oxidized and enter the matte converting slag to form the second slag.

[0014] Optionally, the reducing agent includes waste resin, coke chips, coal, and charcoal, and the addition amount is 0.1-2 wt% of the total amount of the multi-source copper-based solid waste and the matte converting slag.

[0015] Compared with the prior art, the beneficial effects of the present application include: The present application combines the co-smelting of copper-based solid waste with the reduction and depletion of matte slag, which not only solves the problems of difficult slag formation and low copper recovery rate in the co-smelting of copper-based solid waste, but also solves the problems of few reduced and depleted metal phases in matte slag and difficult separation of slag and matte. By modifying and reducing the matte converting slag, medium-valued metals in the converting slag enter the blister copper, and iron, aluminum, etc. in the copper-based waste enter the smelting slag to form slag, ultimately realizing the efficient recovery of valuable metals such as copper. The process does not require the addition of slag-forming agents and sulfiding agents, and realizes 100% self-flux smelting. Description of the Drawings

[0016] To more clearly illustrate the technical solutions of the embodiments of the present application, the accompanying drawings required for the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application and should not be regarded as limiting the scope of the present application.

[0017] Figure 1 It is a schematic process flow diagram of the method for self-heating collaborative smelting to recover copper and matte converting slag impoverishment adopted in the embodiment. Detailed implementation manners

[0018] As used herein, the terms: "Prepared from" is synonymous with "comprising". The terms "comprising", "including", "having", "containing" or any other variation thereof used herein are intended to cover non-exclusive inclusion. For example, a composition, step, method, article or apparatus containing the listed elements is not necessarily limited to those elements, but may include other elements not expressly listed or elements inherent to such composition, step, method, article or apparatus.

[0019] The connecting word "consisting of" excludes any unstated element, step or component. If used in a claim, this phrase will render the claim closed, excluding materials other than those described, except for conventional impurities associated therewith. When the phrase "consisting of" appears in a clause of the claim body rather than immediately following the subject, it only limits the elements described in that clause; other elements are not excluded from the claim as a whole.

[0020] When an equivalent, concentration, or other value or parameter is expressed as a range, a preferred range, or a range defined by a series of upper preferred values and lower preferred values, this should be understood to specifically disclose all ranges formed by any pairing of any range upper limit or preferred value with any range lower limit or preferred value, regardless of whether the range is separately disclosed. For example, when the range "1 to 5" is disclosed, the described range should be interpreted to include the ranges "1 to 4", "1 to 3", "1 to 2", "1 to 2 and 4 to 5", "1 to 3 and 5", etc. When a numerical range is described herein, unless otherwise stated, the range is intended to include its end values and all integers and fractions within the range.

[0021] In these embodiments, unless otherwise specified, the parts and percentages are by mass.

[0022] "Parts by mass" refers to the basic measurement unit representing the mass ratio relationship of multiple components. One part can represent any unit mass, such as 1 g or 2.689 g, etc. If we say that the mass of component A is a parts by mass and the mass of component B is b parts by mass, it means the mass ratio of component A to component B is a:b. Or it means the mass of component A is aK and the mass of component B is bK (K is an arbitrary number representing the multiple factor). It should not be misunderstood that, different from the number of parts by mass, the sum of the parts by mass of all components is not limited to 100 parts.

[0023] "And / or" is used to indicate that either one or both of the described situations may occur. For example, A and / or B includes (A and B) and (A or B).

[0024] To better explain the technical solution provided by this application, before the specific embodiments, the technical solution will be described as a whole first.

[0025] This application provides a method for self-heating collaborative smelting to recover copper and impoverish matte converting slag, including: Directly discharging the liquid matte converting slag generated in the copper smelting process into a hot collaborative smelting furnace, adding multi-source copper-based solid waste after coarse crushing and mixing, and carrying out collaborative smelting under the condition of oxygen-enriched air. The collaborative smelting includes a melting stage, a slag impoverishment stage, and a standing stage; In the melting stage, copper, aluminum, iron, lead, and tin in the copper-based solid waste quickly melt to form first crude copper; In the slag impoverishment stage, aluminum and iron in the first crude copper and the organic matter in the copper-based solid waste are used as reducing agents to reduce the oxides of copper, nickel, cobalt, zinc, and lead in the matte converting slag into a metallic state and enter the first crude copper to form second crude copper. Iron and aluminum are oxidized and enter the matte converting slag to form second slag; In the standing stage, a reducing agent is added and blowing is stopped. After standing, third crude copper and third slag are formed, which are discharged from the copper outlet and the slag outlet respectively, and the crude copper product is collected; The first crude copper includes copper, aluminum, iron, lead, and tin; The second crude copper includes copper, lead, tin, nickel, cobalt, and zinc; The third crude copper includes copper, lead, tin, nickel, cobalt, and zinc.

[0026] It can be understood that in this application, multi-source copper-based solid wastes such as waste circuit boards, waste resin powder, and low-grade waste miscellaneous copper are co-smelted with matte converting slag to obtain blister copper with a copper content greater than 90 wt%, and precious metals such as gold and silver are enriched in the blister copper; the organic matter in the waste circuit boards and waste resin powder serves as fuel to provide the heat required for self-heating smelting; iron, aluminum, and some organic matter in the copper-based solid waste serve as reducing agents to reduce valuable metal oxides such as copper, lead, zinc, nickel, and cobalt in the matte converting slag into the blister copper; silicon in the copper-based solid waste serves as a flux to improve the slag properties in the reduction and impoverishment process of the matte converting slag; oxygen-enriched air is used to assist smelting to control the smelting temperature. This method overcomes the problems of poor adaptability of raw materials for pyrometallurgical recovery of copper-based waste, difficult slag formation, and low recovery rate of valuable metals. By using a self-heating and synergistic method, 100% of the smelting heat is provided by the copper-based waste; at the same time, it solves the problems of external heat supply for the reduction and impoverishment of matte converting slag and difficult separation of slag and matte, and significantly reduces the use of sulfiding agents and slag-forming agents, realizing the effective impoverishment of matte converting slag.

[0027] In an optional embodiment, the multi-source copper-based solid waste contains 10-30 wt% copper, 5-20 wt% iron and aluminum; the matte converting slag contains 0.8-5 wt% copper, 45-60 wt% iron, and 25-35 wt% silicon dioxide.

[0028] Optionally, the copper content in the multi-source copper-based solid waste can be 10 wt%, 11 wt%, 12 wt%, 13 wt%, 14 wt%, 15 wt%, 16 wt%, 17 wt%, 18 wt%, 19 wt%, 20 wt%, 21 wt%, 22 wt%, 23 wt%, 24 wt%, 25 wt%, 26 wt%, 27 wt%, 28 wt%, 29 wt%, 30 wt%, or any value between 10-30 wt%. Optionally, the content of the slag-forming metal can be 10 wt%, 11 wt%, 12 wt%, 13 wt%, 14 wt%, 15 wt% of the content of the multi-source copper-based solid waste, or any value between 10-15 wt%.

[0029] In an optional embodiment, the temperature of the co-smelting is 1250-1350 °C and the time is 60-120 min.

[0030] Optionally, the temperature of the co-smelting can be 1250 °C, 1260 °C, 1270 °C, 1280 °C, 1290 °C, 1300 °C, 1310 °C, 1320 °C, 1330 °C, 1340 °C, 1350 °C, or any value between 1200-1300 °C. Preferably, the temperature of the co-smelting is 1250-1300 °C and the time is 60-100 min.

[0031] In an alternative embodiment, the calorific value of the multi-source copper-based solid waste is 1.5 - 1.7 MJ / kg.

[0032] Optionally, the calorific value of the multi-source copper-based solid waste can be 1.5 MJ / kg, 1.51 MJ / kg, 1.52 MJ / kg, 1.53 MJ / kg, 1.54 MJ / kg, 1.55 MJ / kg, 1.56 MJ / kg, 1.57 MJ / kg, 1.58 MJ / kg, 1.59 MJ / kg, 1.6 MJ / kg, 1.61 MJ / kg, 1.62 MJ / kg, 1.63 MJ / kg, 1.64 MJ / kg, 1.65 MJ / kg, 1.66 MJ / kg, 1.67 MJ / kg, 1.68 MJ / kg, 1.69 MJ / kg, 1.7 MJ / kg, or any value between 1.5 - 1.7 MJ / kg.

[0033] In an alternative embodiment, the matte converting slag is 60 - 500 wt% of the multi-source copper-based solid waste.

[0034] Optionally, the matte converting slag can be 60 wt%, 100 wt%, 150 wt%, 200 wt%, 250 wt%, 300 wt%, 350 wt%, 400 wt%, 450 wt%, 500 wt% of the multi-source copper-based solid waste, or any value between 60 - 500 wt% of the multi-source copper-based solid waste. Preferably, the matte converting slag is 100 - 300 wt% of the multi-source copper-based solid waste.

[0035] In an alternative embodiment, the concentration of oxygen in the oxygen-enriched air is 25 - 40%.

[0036] Optionally, the oxygen content in the oxygen-enriched air can be 25%, 26%, 27%, 28%, 29%, 30%, 31%, 32%, 33%, 34%, 35%, 36%, 37%, 38%, 39%, 40%, or any value between 25 - 40%.

[0037] During the co-smelting and de-sulfurization period, under the agitation of oxygen-enriched air, metallic iron, aluminum in the first blister copper and some organic matters in the copper-based solid waste are in full contact with the matte converting slag. Oxides of copper, lead, zinc, nickel, cobalt, etc. in the slag are reduced to metals and enter the blister copper to form the second blister copper, while iron and aluminum are oxidized to oxides and enter the slag to form the second slag.

[0038] In an alternative embodiment, at least 80 wt% of the copper in the converting slag enters the first blister copper to form the second blister copper, and less than 99 wt% of the iron and aluminum in the multi-source copper-based solid waste enter the matte converting slag to form the second slag.

[0039] In an optional embodiment, the reducing agent powder includes waste resin powder, coke chips, pulverized coal, and charcoal, and the addition amount is 0.1-2 wt% of the total amount of the multi-source copper-based solid waste and the matte converting slag.

[0040] Optionally, the addition amount of the reducing agent can be 0.1 wt%, 0.2 wt%, 0.3 wt%, 0.4 wt%, 0.5 wt%, 0.6 wt%, 0.7 wt%, 0.8 wt%, 0.9 wt%, 1 wt%, 1.1 wt%, 1.2 wt%, 1.3 wt%, 1.4 wt%, 1.5 wt%, 1.6 wt%, 1.7 wt%, 1.8 wt%, 1.9 wt%, 2 wt% of the total amount of the matte converting slag, or any value between 0.1-2 wt%.

[0041] The embodiments of the present application will be described in detail below in conjunction with specific examples. However, those skilled in the art will understand that the following examples are only used to illustrate the present application and should not be construed as limiting the scope of the present application. For those not specified in the examples, they are carried out according to the conventional conditions or the conditions recommended by the manufacturer. For the reagents or instruments not specified in the manufacturer, they are all conventional products that can be obtained through commercial purchase.

[0042] Example 1 This example provides a method for self-heating co-smelting to recover copper and impoverish matte converting slag. The process is as Figure 1 shown, and the specific process is as follows: Take 900 kg of multi-source copper-based solid waste and 900 kg of hot matte converting slag. After coarse crushing and mixing, place them in a co-smelting furnace, blow in 30% oxygen-enriched air to burn the waste organic matter. The co-smelting temperature is 1300 °C, and the co-smelting time is 70 min.

[0043] The composition and addition amount of the multi-source copper-based solid waste are shown in Table 1. The calculated calorific value of the multi-source copper-based solid waste is 1.55 MJ / kg of copper-based waste. After smelting for 1 hour, stop blowing in oxygen-enriched air, and spray in 6 kg of waste resin powder. After standing for 10 minutes, slag and copper are discharged. Obtain 197.0 kg of crude copper and 1238.5 kg of smelting slag.

[0044] The comprehensive recovery rate of copper is 98.19%, the comprehensive recovery rate of gold and silver is about 99%, and the comprehensive recovery rate of lead and zinc is greater than 80%; the melting point of the smelting slag is 1287 °C, which is lower than the smelting temperature of 1300 °C, and the copper content in the slag is 0.26%, and the slag-copper separation effect is good.

[0045] Table 1 Raw material table of Example 1

[0046] *Au-g / t Example 2 This embodiment provides a method for self-heating collaborative smelting to recover copper and impoverish matte converting slag. The process is as follows Figure 1 shown, and the specific process is as follows: Take 1800 kg of copper-based waste and 3600 kg of hot matte converting slag, after coarse crushing and mixing, place them in a collaborative smelting furnace, blow in 35% oxygen-enriched air to burn the waste organic matter, with a smelting temperature of about 1280 °C and a collaborative smelting time of 100 min.

[0047] The composition and addition amount of multi-source copper-based solid waste are shown in Table 2. The calculated calorific value of the multi-source copper-based solid waste is 1.52 MJ / kg of copper-based waste. After smelting for 1.5 hours, stop blowing in oxygen-enriched air, spray in 25 kg of coke powder, let it stand for 10 minutes, then discharge the slag and copper. Obtain 427.5 kg of blister copper and 4175.5 kg of smelting slag.

[0048] The comprehensive recovery rate of copper is 98.01%, the comprehensive recovery rate of gold and silver is about 99%, and the comprehensive recovery rate of lead and zinc is greater than 80%; the melting point of the smelting slag is 1275 °C, which is lower than the smelting temperature of 1280 °C, and the copper content in the slag is 0.19%, with good slag-copper separation effect.

[0049] Table 2 Raw material table of Example 2

[0050] *Au - g / t Example 3 This embodiment provides a method for self-heating collaborative smelting to recover copper and impoverish matte converting slag. The process is as follows Figure 1 shown, and the specific process is as follows: Take 300 kg of copper-based waste and 900 kg of hot matte converting slag, after coarse crushing and mixing, place them in a collaborative smelting furnace, blow in 28% oxygen-enriched air to burn the waste organic matter, with a smelting temperature of about 1320 °C and a collaborative smelting time of 100 min.

[0051] The composition and addition amount of multi-source copper-based solid waste are shown in Table 3. The calculated calorific value of the multi-source copper-based solid waste is 1.63 MJ / kg of copper-based waste. After smelting for 1.5 hours, stop blowing in oxygen-enriched air, spray in 4 kg of coke powder, let it stand for 10 minutes, then discharge the slag and copper. Obtain 80.5 kg of blister copper and 958.0 kg of smelting slag.

[0052] The comprehensive recovery rate of copper is 98.12%, the comprehensive recovery rate of gold and silver is about 99%, and the comprehensive recovery rate of lead and zinc is greater than 80%; the melting point of the smelting slag is 1304 °C, which is lower than the smelting temperature of 1320 °C, and the copper content in the slag is 0.14%, with good slag-copper separation effect.

[0053] Table 3 Raw material table of Example 3

[0054] *Au-g / t Comparative Example 1 This comparative example provides a method for self-heating co-smelting to recover copper and impoverish matte converting slag. Compared with Example 1, hot matte converting slag was not added. The specific process is as follows: Take 900 kg of multi-source copper-based solid waste, after coarse crushing and mixing, place it in a co-smelting furnace, blow in 30% oxygen-enriched air to burn the waste organic matter, the co-smelting temperature is 1300 °C, and the co-smelting time is 70 min.

[0055] The composition and addition amount of the multi-source copper-based solid waste are shown in Table 1. The calculated calorific value of the multi-source copper-based solid waste is 1.55 MJ / kg of copper-based waste. After smelting for 1 hour, stop blowing in oxygen-enriched air, spray in 6 kg of waste resin powder, let it stand for 10 minutes, and then discharge the slag and copper. Obtain 163.5 kg of blister copper and 445.0 kg of smelting slag.

[0056] The comprehensive recovery rate of copper is 93.43%, the comprehensive recovery rate of gold and silver is about 94%, and the comprehensive recovery rate of lead and zinc is less than 80%; the melting point of the smelting slag is 1366 °C, higher than the smelting temperature of 1300 °C, the viscosity of the slag is large, the slag-copper separation effect is poor, the copper content in the slag is 2.48%, and the copper recovery rate is low.

[0057] Comparative Example 2 This comparative example provides a method for self-heating co-smelting to recover copper and impoverish matte converting slag. Compared with Example 1, the calculated calorific value of the multi-source copper-based solid waste is 1.44 MJ / kg of copper-based waste. The specific process is as follows: Take 900 kg of multi-source copper-based solid waste and 900 kg of hot matte converting slag, after coarse crushing and mixing, place them in a co-smelting furnace, blow in 30% oxygen-enriched air to burn the waste organic matter, the co-smelting temperature is 1220 °C, and the co-smelting time is 70 min.

[0058] The composition and addition amount of the multi-source copper-based solid waste are shown in Table 4. The calculated calorific value of the multi-source copper-based solid waste is 1.44 MJ / kg of copper-based waste. After smelting for 1 hour, stop blowing in oxygen-enriched air, spray in 6 kg of waste resin powder, let it stand for 10 minutes, and then discharge the slag and copper. Obtain 223.5 kg of blister copper and 1188.0 kg of smelting slag.

[0059] The copper recovery rate is 91.41%, the gold and silver recovery rate is about 94%, and the lead and zinc recovery rate is less than 80%; the melting point of the smelting slag is 1283 °C, higher than the smelting temperature of 1220 °C, the viscosity of the slag is large, the slag-copper separation effect is poor, the copper content in the slag is 1.51%, and the copper recovery rate is low.

[0060] Table 4 Raw Material Table of Comparative Example 2

[0061] Comparative Example 3 This comparative example provides a method for self-heating collaborative smelting to recover copper and impoverish matte-converting slag. Compared with Example 1, an excessive amount of hot matte-converting slag is added. The specific process is as follows: Take 900 kg of multi-source copper-based solid waste and 5000 kg of hot matte-converting slag. After coarse crushing and mixing, place them in a collaborative smelting furnace, blow in 30% oxygen-enriched air to burn the waste organic matter. The collaborative smelting temperature is 1300 °C, and the collaborative smelting time is 70 min.

[0062] The calculated calorific value of the multi-source copper-based solid waste is 1.55 MJ / kg of copper-based waste. After smelting for 1 hour, stop blowing in oxygen-enriched air, spray in 6 kg of waste resin powder, let it stand for 10 minutes, and then discharge the slag and copper. Obtain 270.0 kg of blister copper and 4910.0 kg of smelting slag.

[0063] The comprehensive recovery rate of copper is 88.70%, the comprehensive recovery rate of gold and silver is about 96%, and the comprehensive recovery rate of lead and zinc is less than 60%; the melting point of the smelting slag is 1294 °C, close to the smelting temperature of 1300 °C; the reducing agent in the copper-based waste is not sufficient to reduce the valuable elements in the matte-converting slag, and the copper content in the slag is 0.59%, resulting in a low copper recovery rate.

[0064] The collaborative smelting results in each example and comparative example are shown in Table 5 as follows: Table 5 Composition, copper content, melting point and copper recovery rate of the furnace slag after collaborative smelting

[0065] Finally, it should be noted that: the above examples are only used to illustrate the technical solutions of the present application, not to limit them; although the present application has been described in detail with reference to the foregoing examples, those of ordinary skill in the art should understand that: they can still modify the technical solutions described in the foregoing examples, or perform equivalent replacements on some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the examples of the present application.

[0066] In addition, those skilled in the art can understand that although some of the examples herein include certain features included in other examples but not other features, the combination of the features of different examples means that it is within the scope of the present application and forms different examples. For example, in the above claims, any one of the claimed examples can be used in any combination. The information disclosed in this background art section is only intended to deepen the understanding of the overall background art of the present application, and should not be regarded as an admission or any form of implication that this information constitutes prior art known to those skilled in the art.

Claims

1. A method for self-heating collaborative smelting to recover copper and impoverish matte-converting slag, characterized in that Including: Directly discharging the liquid matte converting slag generated in the copper smelting process into a hot co-smelting furnace, adding multi-source copper-based solid waste after coarse crushing and mixing, and carrying out co-smelting under the condition of oxygen-enriched air. The co-smelting includes a melting period, a de-slagging period, and a standing period; In the melting period, copper, aluminum, iron, lead, and tin in the copper-based solid waste are rapidly melted to form first crude copper; In the de-slagging period, aluminum and iron in the first crude copper and organic matter in the copper-based solid waste are used as reducing agents to reduce the oxides of copper, nickel, cobalt, zinc, and lead in the matte converting slag into a metallic state and enter the first crude copper to form second crude copper. Iron and aluminum are oxidized and enter the matte converting slag to form second slag; In the standing period, a reducing agent is added and blowing is ended. After standing, third crude copper and third slag are formed, which are discharged from the copper outlet and the slag outlet respectively, and the crude copper product is collected; The first crude copper includes copper, aluminum, iron, lead, and tin; The second crude copper includes copper, lead, tin, nickel, cobalt, and zinc; The third crude copper includes copper, lead, tin, nickel, cobalt, and zinc.

2. The method for self-heating collaborative smelting to recover copper and impoverish matte converting slag according to claim 1, wherein The multi-source copper-based solid waste contains 10-30 wt% copper, and the matte converting slag contains 0.8-5 wt% copper, 45-60 wt% iron, and 25-35 wt% silicon dioxide.

3. The method for self-heating collaborative smelting to recover copper and impoverish matte converting slag according to claim 2, characterized in that, The multi-source copper-based solid waste includes slag-forming metals, and the slag-forming metals include iron and aluminum; the content of the slag-forming metals is 5-20 wt% of the multi-source copper-based solid waste.

4. The method for self-heating collaborative smelting to recover copper and impoverish matte converting slag according to claim 2, characterized in that, The matte converting slag is 60-500 wt% of the multi-source copper-based solid waste.

5. The method for self-heating collaborative smelting to recover copper and copper matte converting slag impoverishment according to claim 1, characterized in that The temperature of the co-smelting is 1250-1350 °C.

6. The method for self-heating collaborative smelting to recover copper and impoverish matte converting slag according to claim 1, characterized in that, The calorific value of the multi-source copper-based solid waste is 1.5-1.7 MJ / kg.

7. The method for self-heating collaborative smelting to recover copper and impoverish matte converting slag according to claim 1, wherein The concentration of oxygen in the oxygen-enriched air is 25-40%.

8. The method for self-heating collaborative smelting to recover copper and impoverish matte converting slag according to claim 1, characterized in that, In the de-slagging period of the co-smelting, under the disturbance of oxygen-enriched air, metallic iron and aluminum in the first crude copper and part of the organic matter in the copper-based solid waste are in full contact with the matte converting slag. The oxides of copper, lead, zinc, nickel, and cobalt in the slag are reduced into metals and enter the crude copper to form second crude copper. Iron and aluminum are oxidized into oxides and enter the slag to form second slag.

9. The method for self-heating collaborative smelting to recover copper and to impoverish matte converting slag according to claim 1, wherein In the de-slagging period, no less than 80 wt% of the copper in the blowing slag is reduced and enters the first crude copper to form the second crude copper, and no less than 99 wt% of the iron and aluminum in the multi-source copper-based solid waste are oxidized and enter the matte converting slag to form the second slag.

10. The method for self-heating collaborative smelting to recover copper and deplete matte converting slag according to any one of claims 1-9, characterized in that, The reducing agent includes waste resin, coke chips, coal, and charcoal, and the addition amount is 0.1-2 wt% of the total amount of the multi-source copper-based solid waste and the matte converting slag.

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