WO2018228075A1 - 短流程炼铜方法及系统 - Google Patents

短流程炼铜方法及系统 Download PDF

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Publication number
WO2018228075A1
WO2018228075A1 PCT/CN2018/085311 CN2018085311W WO2018228075A1 WO 2018228075 A1 WO2018228075 A1 WO 2018228075A1 CN 2018085311 W CN2018085311 W CN 2018085311W WO 2018228075 A1 WO2018228075 A1 WO 2018228075A1
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WIPO (PCT)
Prior art keywords
copper
smelting
furnace
slag
chamber
Prior art date
Application number
PCT/CN2018/085311
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English (en)
French (fr)
Chinese (zh)
Inventor
李东波
陆志方
李兵
梁帅表
尉克俭
刘诚
黎敏
茹洪顺
蒋继穆
曹珂菲
张海鑫
颜杰
李锋
陆金忠
周钢
刘恺
Original Assignee
中国恩菲工程技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
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Publication date
Priority claimed from CN201710449064.3A external-priority patent/CN107227410A/zh
Priority claimed from CN201710449049.9A external-priority patent/CN107326195A/zh
Application filed by 中国恩菲工程技术有限公司 filed Critical 中国恩菲工程技术有限公司
Priority to RU2020100886A priority Critical patent/RU2733803C1/ru
Priority to PE2019002544A priority patent/PE20200188A1/es
Publication of WO2018228075A1 publication Critical patent/WO2018228075A1/zh
Priority to ZA2020/00147A priority patent/ZA202000147B/en

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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B15/00—Obtaining copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B19/00—Obtaining zinc or zinc oxide
    • C22B19/20—Obtaining zinc otherwise than by distilling
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B5/00—General methods of reducing to metals
    • C22B5/02—Dry methods smelting of sulfides or formation of mattes
    • C22B5/16—Dry methods smelting of sulfides or formation of mattes with volatilisation or condensation of the metal being produced
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
    • C22B7/00—Working up raw materials other than ores, e.g. scrap, to produce non-ferrous metals and compounds thereof; Methods of a general interest or applied to the winning of more than two metals
    • C22B7/04—Working-up slag
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B1/00—Shaft or like vertical or substantially vertical furnaces
    • F27B1/02—Shaft or like vertical or substantially vertical furnaces with two or more shafts or chambers, e.g. multi-storey
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B3/00—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces
    • F27B3/04—Hearth-type furnaces, e.g. of reverberatory type; Tank furnaces of multiple-hearth type; of multiple-chamber type; Combinations of hearth-type furnaces
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27B—FURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B7/00—Rotary-drum furnaces, i.e. horizontal or slightly inclined
    • F27B7/02—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type
    • F27B7/04—Rotary-drum furnaces, i.e. horizontal or slightly inclined of multiple-chamber or multiple-drum type with longitudinal divisions
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/20—Recycling

Definitions

  • the present application relates to the field of copper smelting, and in particular to a short process copper smelting method and system.
  • the traditional fire method copper smelting process includes three steps of smelting, blowing and refining, wherein the smelting furnace smelts copper concentrate into 40-60% copper-copper (also called copper bismuth) containing copper; Copper is blown into blister copper; the refining furnace (anode furnace) refines the blister copper into anode copper, and then sends it to electrolysis to produce a cathode copper plate.
  • the smelting furnace smelts copper concentrate into 40-60% copper-copper (also called copper bismuth) containing copper
  • Copper is blown into blister copper
  • the refining furnace refines the blister copper into anode copper, and then sends it to electrolysis to produce a cathode copper plate.
  • the current smelting slag is treated by slow slag, crushing, grinding, thickening and flotation slag beneficiation process, and the slag concentrate produced is returned to the smelting system, and the slag tailings are discarded or sold as building materials.
  • the process is tedious and covers a large area. What is more important is that valuable metals such as zinc, lead and antimony in the slag enter the slag tailings and are not recycled, resulting in huge waste of valuable resources;
  • the added ore dressing agents, as well as the various heavy metals present in the slag, can also cause potential environmental pollution hazards.
  • the main purpose of the present application is to provide a short process copper smelting method and system to solve the problem of waste of valuable metal loss and environmental pollution in the copper smelting method of the prior art.
  • a short-flow copper smelting method which comprises a smelting furnace, a copper-making furnace, a CR furnace, a first flow tank and a second flow tank; A copper crucible outlet and a smelting slag outlet are provided; the coppermaking furnace is provided with a copper crucible inlet, the copper crucible inlet is connected to the copper crucible outlet through the first laundering; the CR furnace is provided with a molten slag inlet, and the molten slag inlet is passed through the second lamellar and smelting The slag outlet is connected; the short-flow copper smelting method comprises the steps of: smelting the copper concentrate in a smelting furnace to obtain a first copper slag and a smelting slag; and performing a copper-making reaction on the first copper bismuth in the copper-making furnace to form an anode Copper and copper s
  • the step of melting the copper concentrate in the melting furnace comprises: mixing the copper concentrate with the first flux to obtain a mixture; feeding the mixture into a melting furnace, and performing melting under the action of the first oxidant, a first copper crucible and a smelting slag; preferably, a bottom blowing smelting method or a side blowing smelting method is employed in the smelting process; preferably, the first flux is selected from quartz stone and/or limestone; and the first oxidizing agent is selected from the group consisting of oxygen, compressed air, and rich One or more of oxygen air.
  • the first oxidizing agent is injected in an amount of 120 Nm 3 or more and O 2 per ton of copper concentrate so that the copper content of the first copper cerium is 70% by weight or more.
  • the first oxidizing agent is injected in an amount of from 120 to 200 Nm 3 of O 2 per ton of copper concentrate such that the copper content of the first copper cerium is from 70 to 78% by weight.
  • the cooled copper-making slag is put into a melting furnace and smelted together with the copper concentrate.
  • the first copper crucible is oxidized by injecting oxygen-enriched air into the copper-making furnace to perform a copper-making reaction, and the volume percentage of oxygen in the oxygen-enriched air is 30 to 80%. .
  • the step of performing a copper-making reaction on the first copper crucible in the copper-making furnace further comprises: simultaneously adding cold material to the copper-making furnace, and/or spraying water mist into the copper-making furnace, and/or forming copper
  • a cooling element is disposed outside the furnace body of the furnace; wherein the cold material includes one or more of waste copper, electrolytic residual copper, and solid copper.
  • the metal copper and the copper-making slag are obtained; when the oxygen in the metal copper in the copper-making furnace is less than 0.2% by weight, the copper slag is discharged.
  • the anode copper is obtained; when the oxygen in the metal copper in the coppermaking furnace is higher than 0.2 wt%, the copper slag is discharged out of the coppermaking furnace, and the reducing agent is introduced into the coppermaking furnace to the metal copper.
  • the copper oxide impurities are subjected to a reduction reaction to obtain an anode copper.
  • the second flux is added from the top of the copper making furnace; meanwhile, the oxygen-enriched air is sprayed into the copper making furnace by bottom blowing.
  • the agents, preferably the solid carbon-based reducing agent is pulverized coal and/or lump coal.
  • the CR furnace comprises a cavity, the cavity comprises a reducing reduction chamber and a sedimentation chamber; and the step of recovering the valuable metal in the smelting slag comprises: reducing and smelting the smelting slag in the reducing smoulding chamber, Obtaining valuable metal soot and reducing slag; and, the reducing slag is settled in the sedimentation chamber to obtain the second copper ruthenium and the harmless slag; or the smelting slag is subjected to sedimentation treatment in the sedimentation chamber to obtain the second copper ruthenium and The sedimentation slag is; and the sedimentation slag is subjected to reduction and smoulding treatment in the reduction smoulding chamber to obtain valuable metal soot and harmless slag.
  • a partition wall is further disposed in the cavity to divide the cavity into a reduction smoulding cavity and a sedimentation cavity, and the smog reduction and reduction smog cavity and the sedimentation cavity are respectively located on two sides of the partition wall in a horizontal direction, and the reduction is smoked.
  • the communication passage between the chamber and the settling chamber is disposed near the bottom of the chamber.
  • the step of reducing the fuming treatment comprises: adding a second reducing agent to the reducing flue gas chamber for reductive fuming treatment; preferably, the second reducing agent is selected from the group consisting of natural gas, coal gas, liquefied petroleum gas, iron powder and solid carbon base
  • the second reducing agent is selected from the group consisting of natural gas, coal gas, liquefied petroleum gas, iron powder and solid carbon base
  • the reducing agents more preferably the solid carbon-based reducing agent is selected from the group consisting of lump coal and/or pulverized coal.
  • the second reducing agent is blasted into the reducing smoulding chamber by using a side blowing lance; preferably, the reducing smoulding chamber is further provided with The venting port, the step of reducing the smoulding treatment further comprises: introducing a secondary air at the upper portion of the reducing smoulding chamber or at the venting port.
  • the reaction temperature is 1200 to 1400 °C.
  • a collector is added to the reduction flue gas chamber while the reduction flue gas treatment is performed; preferably, the trap agent is selected from the first vulcanizing agent and/or copper concentrate More preferably, the first vulcanizing agent is selected from the group consisting of pyrite and/or pyrite; and when the reducing flue-processing step is located after the sedimentation treatment step, a second vulcanizing agent and/or a vulcanizing agent are added to the settling chamber while the sedimentation treatment is being performed. Or copper concentrate, preferably the second vulcanizing agent is selected from one or more of pyrite, pyrite and lead slag scum; preferably, the settling chamber is insulated while the settling treatment is performed.
  • the step of the sedimentation treatment further comprises: injecting an inert gas and/or a sulfur dioxide gas into the settling chamber.
  • the copper smelting method further comprises the step of returning the second copper crucible to the melting furnace for melting.
  • a short-flow copper smelting system comprising: a smelting furnace for smelting a copper concentrate to produce a first copper crucible and a smelting slag; the smelting furnace is provided with a first Copper bismuth outlet and smelting slag outlet; copper-making furnace, copper-making furnace is provided with copper enamel inlet and copper slag outlet, copper enamel inlet and first copper raft outlet are connected through the first flow tank, and copper-making furnace is used for the first copper ⁇ a copper-making reaction to produce anode copper and copper slag; and a CR furnace, the CR furnace is provided with a smelting slag inlet, the smelting slag inlet and the smelting slag outlet are connected through a second flow tank, and the CR furnace is used for reducing smelting slag And settling to recover valuable metals in the smelting slag and to make harmless
  • the melting furnace is a bottom blowing melting furnace or a side blowing melting furnace.
  • the melting furnace is provided with a copper slag inlet for passing the cooled copper slag into the melting furnace.
  • the copper making furnace is further provided with: a first spray gun disposed at a side or a bottom of the copper making furnace for injecting an oxidant and an optional reducing agent into the copper making furnace; and a flux inlet for accessing Flux.
  • the furnace body of the copper making furnace is a horizontal cylindrical furnace body.
  • the copper making furnace is further provided with a cold material inlet for adding one or more of electrolytic copper residual, waste copper and solid copper to the copper making furnace.
  • the copper making system further includes a cooling device for cooling the copper making furnace.
  • the cooling device is a negative pressure water jacket device or a water spray mist cooling device.
  • the copper making furnace is further provided with an anode copper outlet;
  • the short-flow copper smelting system further comprises a casting device, and the casting device is connected with the anode copper outlet for casting the anode copper.
  • the casting apparatus is a double disc casting machine.
  • the CR furnaces are arranged in parallel or in series, and the copper-making furnaces are provided in parallel.
  • the CR furnace comprises a cavity, the cavity comprises a reducing smog chamber and a sedimentation chamber, and the reducing smoulding chamber is connected with the smelting slag outlet for reducing and smelting the smelting slag, and setting the reducing smoulding chamber
  • the sedimentation chamber is used for sedimentation treatment of the reducing slag generated after the reductive fuming treatment, and the sedimentation chamber is provided with a second copper crucible outlet and a harmless slag discharge outlet; or, the CR furnace includes a cavity, a cavity
  • the invention comprises a reducing reduction chamber and a sedimentation chamber connected to each other, the sedimentation chamber is connected with the smelting slag outlet for settlement treatment of the smelting slag, and the sedimentation chamber is provided with a second copper sputum outlet; the reduction smoulding chamber is used for the settlement treatment
  • the generated sediment slag is subjected to reduction and fuming treatment
  • a partition wall is further disposed in the cavity to divide the cavity into a reducing tobacco chamber and a sedimentation chamber, and the reducing tobacco chamber and the sedimentation chamber are respectively located on two sides of the partition wall in a horizontal direction, and the reducing tobacco chamber and the reducing chamber
  • the communication passage of the settling chamber is disposed near the bottom of the chamber.
  • the reduction smoulding chamber is further provided with: a second spray gun disposed at a side of the reduction smoky chamber for adding a reducing agent to the reduction smoulding chamber; and a feeding port disposed at the top of the reduction smoulding chamber, A collector is added to the reducing fuming chamber.
  • the settling chamber is further provided with a heating device for holding or warming the sedimentation chamber.
  • the heating device is an immersion combustion nozzle or an electrode.
  • the second copper crucible outlet is used to discharge the second copper sulfur
  • the second copper crucible inlet is further disposed on the melting furnace for passing the cooled second copper sulfur into the melting furnace.
  • the copper-smelting device used in the method comprises a melting furnace, a copper-making furnace, a CR furnace, a first flow tank and a second flow tank; the melting furnace is provided with a copper crucible outlet and a smelting slag outlet; the copper-making furnace is provided with a copper crucible inlet, copper The inlet of the crucible is communicated with the outlet of the copper crucible through the first flow channel; the inlet of the molten slag is provided with the CR furnace, and the inlet of the molten slag is connected to the outlet of the molten slag through the second flow channel; the short process copper smelting method comprises the following steps: copper concentrate Melting in a smelting furnace to obtain a first copper crucible and smelting slag; performing a copper-making reaction on the first copper crucible in a copper-making furnace to form an anode
  • the copper smelting method of the present invention adopts a copper-plating device with a pick-up type, and the copper bismuth end of the smelting furnace is directly connected to the copper-making furnace through the launder, and the smelting furnace is discharged.
  • the slag end is directly connected to the CR furnace through the launder, which realizes short-process copper smelting.
  • FIG. 1 shows a schematic structural view of a copper smelting system provided in accordance with an embodiment of the present application.
  • FIG. 2 is a schematic structural view of a short-flow copper smelting system according to an embodiment of the present application
  • FIG. 3 is a block diagram showing the structure of a short-flow copper smelting system according to an embodiment of the present application
  • FIG. 4 is a block diagram showing the structure of a short-flow copper smelting system provided in accordance with an embodiment of the present application.
  • the prior art copper smelting method has a long process, especially for the treatment of smelting slag, which requires a large area of slag slow cooling field and complicated slag beneficiation, which increases construction cost and technical complexity, and has valuable metals. Loss of waste and environmental pollution.
  • the present application proposes a short-process copper smelting method, which comprises a smelting furnace, a copper-making furnace, a CR furnace, a first flow tank and a second flow tank; the smelting furnace is provided with a copper sputum outlet And the smelting slag outlet; the copper making furnace is provided with a copper crucible inlet, the copper crucible inlet is connected to the copper crucible outlet through the first laundering tank; the CR furnace is provided with a molten slag inlet, and the molten slag inlet is connected to the melting slag outlet through the second laundering;
  • the process copper smelting method comprises the steps of: smelting a copper concentrate in a smelting furnace to obtain a first copper slag and a smelting slag; and performing a copper-making reaction on the first copper bismuth in a copper-making furnace to generate an anode copper and a copper slag And
  • noise slag means: slag that does not cause heavy metal contamination.
  • the CR furnace is called a fully recycled furnace.
  • the copper smelting method of the present invention adopts a copper-plating device with a pick-up type, and the copper bismuth end of the smelting furnace is directly connected to the copper-making furnace through the launder, and the smelting furnace is discharged.
  • the slag end is directly connected to the CR furnace through the launder, which realizes short-process copper smelting.
  • the step of smelting the copper concentrate in the smelting furnace comprises: mixing the copper concentrate with the first flux to obtain a mixture; and feeding the mixture into the smelting furnace at the first oxidizing agent Melting is carried out under the action to obtain a first copper crucible and a smelting slag.
  • the bottom blowing smelting method or the side blowing smelting method is employed in the smelting process. The use of the bottom blowing smelting method or the side blowing smelting method can further improve the copper enamel grade.
  • the first flux is selected from quartz stone and/or limestone; the first oxidant is selected from one or more of oxygen, compressed air, and oxygen-enriched air.
  • oxygen-enriched air refers to a gas having a concentration of oxygen greater than the concentration of oxygen in the air, such as may be obtained by incorporating oxygen into the air.
  • the first oxidizing agent in the step of smelting the copper concentrate in the smelting furnace, is injected in an amount corresponding to 120 Nm 3 or more of O 2 per ton of copper concentrate to make the copper of the first copper bismuth.
  • the content is 70% by weight or more.
  • the injection amount of the first oxidant is controlled to be 120 Nm 3 or more and O 2 per ton of copper concentrate, so that the copper content of the first copper ruthenium is 70% by weight or more, thereby avoiding the copper content of the first copper ruthenium being too low.
  • the problem of the large amount of copper slag caused is to prevent the problem of low copper yield due to it.
  • the first oxidizing agent is injected in an amount of 120 to 200 Nm 3 O 2 per ton of copper concentrate so that the copper content of the first copper cerium is 70 to 78% by weight, which can further avoid the copper content of the first copper ruthenium.
  • the high smelting slag copper contains an excessively high problem, preventing the problem of low copper yield.
  • elements such as lead, zinc and bismuth enter the smelting slag in the form of oxides, which facilitates subsequent recovery of these elements from the CR furnace. If the copper bismuth contains low copper, such as 40-50%, some of these elements will remain in the copper bismuth, which is not conducive to subsequent recovery from the CR furnace.
  • the cooled copper-making slag is put into a melting furnace and smelted together with the copper concentrate.
  • the melting temperature in the smelting process is 1150 to 1300 ° C
  • the first flux is added in an amount of 1 to 20% by weight based on the total weight of the copper ore.
  • the step of performing a copper-making reaction on the first copper crucible in the copper-making furnace further comprises: simultaneously adding cold material to the copper-making furnace, and/or spraying water mist into the copper-making furnace, And/or providing a cooling element outside the furnace body of the coppermaking furnace; wherein the cold material comprises one or more of waste copper, electrolytic residual copper and solid copper.
  • CN103382528 proposes a two-step copper smelting process, which first melts copper concentrate into 65-78% copper-copper in a smelting furnace, and then directly produces an anode by oxidation-reduction reaction in a converting furnace. copper.
  • This method mainly has the problem of heat balance and the flue gas problem brought about by it: the redox reaction in the blowing furnace emits a large amount of heat, which must be carried away in some way to maintain the heat balance; the process regulates oxygen, air, The amount of nitrogen, the heat of reaction is carried away by the gas, so the total amount of gas injected must be more, and the relative oxygen concentration is necessarily lower, which makes the amount of flue gas large, and the sulfur dioxide content in the flue gas is very low. Therefore, the subsequent flue gas treatment system and the acid production system are large in scale, large in investment, and high in operating cost.
  • the patent does not indicate how to achieve a copper-copper grade of 65 to 78% in the melting furnace.
  • the present invention adopts the method of adding cold material to the copper making furnace, and/or spraying water mist into the copper making furnace, and/or cooling outside the furnace body of the copper making furnace.
  • the thermal balance of the components are as follows:
  • the added cold material may be one or more of waste copper, electrolytic residual copper, and solid copper.
  • waste copper electrolytic residual copper
  • solid copper waste copper, electrolytic residual copper, and solid copper.
  • copper smelting plants use separate metallurgical furnaces to melt and refine secondary copper materials such as waste copper and electrolytic residual copper. This requires not only additional fuel to heat the cold material, but more importantly, the purchase of separate equipment. The construction of separate workshops and the configuration of individual workers has greatly increased the operating costs of the plant.
  • a water jacket which is also for heat dissipation to achieve heat balance of the furnace body.
  • the injection of water mist has the following advantages: 1) Control the furnace temperature more effectively. Since the gasification of water can absorb a large amount of heat, a small change in the amount of water injected can cause a large change in heat, so that the furnace temperature can be controlled more accurately and effectively; 2) the life of the spray gun is extended.
  • the gas injected into the spray gun is less than the low oxygen enrichment concentration, the working strength of the spray gun is low, and the cooling effect of the water can also extend the life of the spray gun itself; 3) 40% rich
  • the oxygen concentration can be nearly 1 times higher than the low oxygen rich concentration (21% to 25%).
  • the high oxygen enrichment concentration (for example, 40%) can handle nearly twice as much material; 4) low energy consumption and low power consumption.
  • the power of the water spray device is much smaller than the size of the device that is blasted into the air.
  • the copper-making furnace of the present invention can be carried out under conditions of high oxygen-rich concentration blowing.
  • the first copper crucible is oxidized by injecting oxygen-enriched air into the copper-making furnace to perform a copper-making reaction, and the volume of oxygen in the oxygen-enriched air The percentage is 30 to 80%.
  • the oxygen concentration of the blowing furnace is 9-60%, since it relies on the gas to carry away heat, the actual oxygen concentration can only be maintained below 25%, and the high oxygen-rich concentration cannot be truly achieved.
  • the above-mentioned heat balance means can fully achieve an oxygen-enriched air concentration of 30 to 80%.
  • the metal copper and the copper-making slag are obtained; when the metal copper in the copper-making furnace contains less than 0.2% by weight of oxygen, The copper slag is discharged from the coppermaking furnace to obtain anode copper; when the oxygen in the metal copper in the coppermaking furnace is higher than 0.2 wt%, the copper slag is discharged into the coppermaking furnace, and the reducing agent is introduced into the coppermaking furnace.
  • the copper oxide impurities in the metallic copper are subjected to a reduction reaction to obtain an anode copper.
  • the purpose of the copper-making reaction is to remove the sulfur element and other impurities in the first copper crucible to obtain a qualified anode copper.
  • the impurity removal process mainly uses an oxidation reaction to oxidize impurities in copper to remove slag.
  • the metal copper in the coppermaking furnace contains less than 0.2% by weight of oxygen, on the one hand, it is indicated that the impurities are more sufficiently oxidized and enter the copper slag, and on the other hand, the copper is substantially not subjected to peroxidation.
  • the process of the copper-making reaction in the process of the copper-making reaction, the process of oxidizing only does not reduce, and the anode copper can be directly obtained.
  • the oxygen contained in the metallic copper in the copper-making furnace is higher than 0.2% by weight, it is indicated that part of the copper is oxidized while removing impurities.
  • a reducing agent may be further added to carry out a reduction reaction of these copper oxide impurities.
  • the reduction reaction is carried out after the copper-making slag is discharged from the copper-making furnace, and it is also possible to prevent the impurities previously oxidized and slag from being dissolved back into the metallic copper, thereby further ensuring the grade of the anode copper.
  • the second flux is added from the top of the copper making furnace; meanwhile, the bottom blowing method is used in the copper making furnace.
  • the oxygen-enriched air is sprayed for oxidation treatment, or alternatively, the first reducing agent is sprayed for reduction.
  • the second flux is selected from the group consisting of quartz stone and/or limestone.
  • the first reducing agent is selected from one or more of natural gas, liquefied petroleum gas, and solid carbon-based reducing agent.
  • the solid carbon-based reducing agent is a pulverized coal and/or a solid carbonaceous reducing agent.
  • the function of the above CR furnace is to recover valuable metals in the smelting slag by reducing fuming and sedimentation, and to make harmless slag.
  • the CR furnace includes a cavity including a reducing reduction chamber and a settling chamber; and the step of recovering the valuable metal in the smelting slag includes: smelting the slag in the reducing smoulding chamber Performing reduction and smoulding treatment to obtain valuable metal flue gas and reducing slag, and sedimenting the reducing slag in the sedimentation chamber to obtain second copper ruthenium and harmless slag; or sedimenting the smelting slag in the sedimentation chamber, The second copper ruthenium and the sedimentation slag are obtained, and the sedimentation slag is subjected to reduction and smoulding treatment in the reduction smoulding cavity to obtain a valuable metal smog and a harmless slag.
  • the above CR furnace is an integrated recovery furnace, which simultaneously includes a reduction smoulding chamber and a settling chamber.
  • the smelting slag is successively subjected to reduction smoulding treatment and sedimentation treatment.
  • the magnetic iron (ferric oxide) in the smelting slag can be reduced to ferrous oxide for slag formation, which can reduce the viscosity of the smelting slag, thereby improving the subsequent sedimentation separation effect and facilitating
  • the second copper ruthenium is separated from the reducing slag.
  • the valuable metal oxides such as zinc, lead and antimony are reduced to metal, they are separated into valuable metal fumes due to their volatility, thereby achieving the purpose of recovering valuable metals.
  • the reduced slag flowing dynamics
  • the reduced slag after the reduction smoulding treatment directly enters the sedimentation separation, on the one hand, the treatment efficiency can be greatly improved; on the other hand, since the reducing slag directly enters the sedimentation treatment, a more stable flow state can be maintained, and in the process There are only slight temperature changes or even no temperature changes. The two reasons make it have better sedimentation effect, which can further improve the recovery rate of the second copper matte.
  • the sedimentation treatment is set before the step of reducing the fuming treatment.
  • the copper ruthenium in the smelting slag can be separated first, and then subjected to reduction and smouldering treatment to further recover valuable metals such as zinc, lead, and antimony.
  • the present invention more preferably adopts a method of first reducing the post-smoothing sedimentation treatment, compared to the manner of reducing the fuming treatment after the sedimentation.
  • the advantage is that the higher the sedimentation separation temperature, the better the separation effect.
  • the temperature required for the reduction of flue gas is very high (1200 to 1400 ° C). Therefore, the temperature of the material after the first reduction of flue gas is high, and separation can be achieved in the sedimentation stage without additional heating.
  • this method of first reducing the post-smoothing sedimentation treatment can also replenish the sedimentation treatment.
  • the specific heating method can be as follows: the electrode can be heated or insulated in the settling section (for example, 3 to 6 electrodes can be set), and/or the submerged combustion nozzle can be provided (the submerged combustion nozzle ejects fuel and oxygen, and the amount of oxygen Control is in the state of incomplete combustion of the fuel).
  • the method of first reducing the post-smoothing sedimentation treatment has the following advantages: after the reducing slag stays in the settling chamber for a certain period of time, the sedimentation stratification of the dross can be more fully realized, the harmless slag is discharged from the upper part, and the second copper slag is discharged from the lower part. release.
  • the smelting slag may be successively subjected to a plurality of reduction smouldering and sedimentation steps, or the smelting slag may be divided into a plurality of parts for performing a reductive smouldering and sedimentation step.
  • a partition wall is further disposed in the cavity to divide the cavity into a reduction smoulding chamber and a sedimentation chamber, and the smog reduction and smog chamber and the sedimentation chamber are respectively located in the horizontal direction of the partition wall.
  • Side, and the communication channel connecting the reducing chamber and the settling chamber is disposed near the bottom of the chamber.
  • the step of reducing the fuming treatment comprises: adding a second reducing agent to the reducing nicotizing chamber for reductive fuming treatment; preferably, the second reducing agent is selected from the group consisting of natural gas, gas, liquefied petroleum gas, One or more of the iron powder and the solid carbon-based reducing agent, more preferably the solid carbon-based reducing agent is selected from the group consisting of lump coal and/or pulverized coal.
  • the reagent is selected for reduction and fuming treatment, and the recovery of valuable metals is more thorough.
  • the oxidant is injected into the reduction smoulding chamber to provide heat by combustion, and the oxidant may also react with the reducing agent to form a reducing gas such as carbon monoxide, and reduce the effect together with the added reducing agent.
  • a reducing gas such as carbon monoxide
  • a side blowing lance is disposed in the reducing smoulding chamber, and in the step of reducing the smoulding treatment, the second reducing agent is blasted into the reducing smoulding chamber by a side blasting gun.
  • the reducing smoulding chamber is further provided with a venting port, and the step of reducing the smoulding treatment further comprises: introducing a secondary air at the upper portion of the reducing smoulding chamber or at the venting port. In this way, the valuable metal flue gas can be oxidized to a valuable metal oxide, and then the flue gas can be recovered.
  • the reaction temperature is 1200 to 1400 °C. More preferably, when the reduction flue gasification treatment step is located before the sedimentation treatment step, a collector is added to the reduction flue gas chamber while the reduction flue gas treatment is performed; preferably, the trap agent is selected from the first vulcanizing agent and/or copper Concentrate, more preferably the first vulcanizing agent is selected from the group consisting of pyrite and/or pyrite.
  • a second vulcanizing agent and/or copper concentrate is added to the sedimentation chamber while the sedimentation treatment is performed, and preferably the second vulcanizing agent is selected from the group consisting of pyrite, pyrite and One or more of lead slag copper scum.
  • a vulcanizing agent and/or a copper concentrate facilitates the reduction of the copper bismuth grade in the smelting slag to be converted into a low-grade copper ruthenium (second copper ruthenium), which can reduce the copper content in the harmless slag and further increase the copper content. Recovery rate.
  • a slag such as lead slag copper scum as a vulcanizing agent, wherein the lead is also It can be volatilized and recovered together with the lead in the sedimentation slag in the reduction fuming step, so that the refractory materials generated in some production processes can be fully utilized to realize comprehensive utilization of resources without adding additional equipment investment and process links.
  • the step of the sedimentation treatment further comprises: injecting an inert gas and/or a sulfur dioxide gas into the settling chamber. This creates a weak agitation which facilitates the separation of copper and slag. More preferably, the sulfur dioxide gas is bubbled in, which acts as a partial vulcanizing agent in addition to the agitation action, and is more advantageous for producing a low-grade copper beryllium in the sedimentation stage.
  • the copper smelting method further comprises the step of returning the second copper crucible to the melting furnace for melting. This can increase the utilization of copper.
  • the copper smelting method further comprises the step of returning the second copper crucible to the copper making furnace for copper making.
  • This can increase the utilization of copper. Since the second copper crucible is generally added in a cooled state (and a solid second copper crucible), it can also function as a heat balance.
  • the obtained copper is a copper melt; after the step of the copper-making reaction, the copper smelting method further comprises casting the copper melt.
  • the step of molding This allows the copper melt to be further cast into a product such as a copper anode plate.
  • the copper smelting system comprises a melting furnace 10, a copper making furnace 20, a CR furnace 30, a first flow tank and a second flow tank;
  • the melting furnace 10 is used for smelting copper concentrate to produce first copper crucible and smelting slag;
  • the melting furnace 10 is provided with a first copper crucible outlet and a smelting slag outlet;
  • the coppermaking furnace 20 is provided with a copper crucible inlet, a copper crucible The inlet and the first copper crucible outlet are connected by a first flow tank, and the copper making furnace 20 is used for copper-making reaction of the first copper crucible to generate anode copper and copper-making slag;
  • the CR furnace 30 is provided with a smelting slag inlet, and the smelting slag The outlet is connected through the second flow channel for reducing smelting and sedimentation of the smelting slag
  • the copper ore can be smelted by the melting furnace 10 to obtain a first copper crucible and a smelting slag.
  • the smelting slag can be reduced and smelted and settled by the CR furnace 30, and the valuable metals in the smelting slag such as metal zinc, lead, bismuth, and the like can be recovered.
  • the valuable metals in the smelting slag such as metal zinc, lead, bismuth, and the like can be recovered.
  • the beneficiation process not only greatly reduces the factory floor space, but also makes the process more simple. It also fundamentally eliminates the pollution caused by the beneficiation agent added in the slag beneficiation process.
  • the CR furnace 30 communicates with the slag end of the melting furnace 10, and the copper making furnace 20 communicates with the copper rim end of the melting furnace 10.
  • the first copper crucible is subjected to a copper-making reaction to form a higher-grade anode copper, and on the other hand, the molten slag produced in the smelting process is obtained.
  • the recycling process that is, the use of a pick-up copper smelting device, greatly shortens the steps of copper smelting, and has a good industrialized large-scale application prospect.
  • the CR furnaces 30 are a plurality of units arranged in parallel or in series.
  • the plurality of CR furnaces 30 can produce the second copper crucible, the valuable metal, and the water-damaged harmless slag by continuous operation or alternate operation, thereby improving the processing efficiency.
  • the copper making furnace 20 is a plurality of tubes arranged in parallel. This also improves the capabilities of the device.
  • the copper making furnace 20 is two in parallel, and the CR furnace is one; or
  • the copper making furnace 20 is one, and the CR furnace is two in parallel; or
  • two copper-making furnaces 20 are arranged in parallel, and the CR furnaces are also two in parallel.
  • the smelting furnace 10 is a bottom-blown smelting furnace or a side-blown smelting furnace.
  • the smelting furnace 10 is provided with a copper slag inlet for passing the cooled copper slag into the smelting furnace 10.
  • the copper making furnace 20 is further provided with a first spray gun and a flux inlet, and the first spray gun is disposed at the side or the bottom of the copper making furnace 20 for injecting oxidant into the copper making furnace 20 and An optional reducing agent; the flux inlet is used to pass the flux.
  • the metal copper in the coppermaking furnace contains less than 0.2% oxygen, on the one hand, it is indicated that the impurities are more sufficiently oxidized and enter the copper slag, and on the other hand, the copper is substantially not subjected to peroxidation.
  • the process of oxidizing only does not reduce, and the anode copper can be directly obtained.
  • the oxygen content in the metallic copper in the copper-making furnace is higher than 0.2%, it indicates that some copper is oxidized while removing impurities.
  • a reducing agent may be further added to carry out a reduction reaction of these copper oxide impurities.
  • the reduction reaction is carried out after the copper-making slag is discharged from the copper-making furnace, and it is also possible to prevent the impurities previously oxidized and slag from being dissolved back into the metallic copper, thereby further ensuring the grade of the anode copper.
  • the furnace body of the copper making furnace 20 is a horizontal cylindrical furnace body.
  • the copper making furnace 20 is further provided with a cold material inlet for adding one or more of electrolytic copper residuals, scrap copper and solid copper crucibles to the copper making furnace 20.
  • the copper making system further includes a cooling device for cooling the copper making furnace 20. This ensures that the copper-making furnace 20 maintains thermal equilibrium during the copper-making reaction stage, creating conditions for injecting oxygen into the copper-making furnace, and further extending the furnace life.
  • the cooling device is a vacuum water jacket device or a water mist cooling device.
  • CN103382528 proposes a two-step copper smelting process, which first melts copper concentrate into 65-78% copper-copper in a smelting furnace, and then directly produces an anode by oxidation-reduction reaction in a converting furnace. copper.
  • This method mainly has the problem of heat balance and the flue gas problem brought about by it: the redox reaction in the blowing furnace emits a large amount of heat, which must be carried away in some way to maintain the heat balance; the process regulates oxygen, air, The amount of nitrogen, the heat of reaction is carried away by the gas, so the total amount of gas injected must be more, and the relative oxygen concentration is necessarily lower, which makes the amount of flue gas large, and the sulfur dioxide content in the flue gas is very low. Therefore, the subsequent flue gas treatment system and the acid production system are large in scale, large in investment, and high in operating cost.
  • the patent does not indicate how to achieve a copper-copper grade of 65 to 78% in the melting furnace.
  • the present invention adopts the method of adding cold material to the copper making furnace, and/or spraying water mist into the copper making furnace, and/or cooling outside the furnace body of the copper making furnace.
  • the thermal balance of the components are as follows:
  • the added cold material may be one or more of waste copper, electrolytic residual copper, and solid copper.
  • waste copper electrolytic residual copper
  • solid copper waste copper, electrolytic residual copper, and solid copper.
  • copper smelting plants use separate metallurgical furnaces to melt and refine secondary copper materials such as waste copper and electrolytic residual copper. This requires not only additional fuel to heat the cold material, but more importantly, the purchase of separate equipment. The construction of separate workshops and the configuration of individual workers has greatly increased the operating costs of the plant.
  • a water jacket which is also for heat dissipation to achieve heat balance of the furnace body.
  • the injection of water mist has the following advantages: 1) Control the furnace temperature more effectively. Since the gasification of water can absorb a large amount of heat, a small change in the amount of water injected can cause a large change in heat, so that the furnace temperature can be controlled more accurately and effectively; 2) the life of the spray gun is extended.
  • the gas injected into the spray gun is less than the low oxygen enrichment concentration, the working strength of the spray gun is low, and the cooling effect of the water can also extend the life of the spray gun itself; 3) 40% rich
  • the oxygen concentration can be nearly 1 times higher than the low oxygen rich concentration (21% to 25%).
  • the high oxygen enrichment concentration (for example, 40%) can handle nearly twice as much material; 4) low energy consumption and low power consumption.
  • the power of the water spray device is much smaller than the size of the device that is blasted into the air.
  • the copper-making furnace of the present invention can be carried out under conditions of high oxygen-rich concentration blowing.
  • the obtained anode copper is a copper melt.
  • the coppermaking furnace 20 is also provided with an anode copper outlet; the short-flow coppermaking system further includes a casting apparatus 40 in communication with the anode copper outlet for casting the anode copper.
  • the copper melt can be further cast by forming the casting apparatus 40 to form a product such as an anode copper plate. More preferably, the casting apparatus 40 is a double disc casting machine.
  • the CR furnace 30 includes a chamber including a reducing reduction chamber 31 and a settling chamber 32 that communicate with the smelting slag outlet for reducing the smelting slag.
  • the reducing smog chamber 31 is provided with a flue gas outlet
  • the settling chamber 32 is connected with the reducing smoating chamber 31 for sedimentation treatment of the reducing slag generated after the reductive smoulding treatment
  • the settling chamber 32 is provided with a first The second copper bismuth outlet and the harmless slag discharge port; or the CR furnace 30 includes a cavity including a reduced reduction smog chamber 31 and a settling chamber 32, and the settling chamber 32 communicates with the smelting slag outlet for performing the smelting slag
  • the sedimentation chamber 32 is provided with a second copper sputum outlet
  • the reduction smoulding chamber 31 is connected to the sedimentation chamber 32 for performing a reduction sm
  • the CR furnace 30 provided by the present invention is an integrated device, which includes a reducing flue gas chamber 31 and a settling chamber 32, and a connection relationship between the reduction flue gas chamber 31 and the sedimentation chamber 32, which can be determined to reduce the flue gas. , post-settling; or settle first, then reduce the fuming.
  • the smelting slag can be first subjected to reduction and smouldering treatment, and then subjected to sedimentation treatment.
  • the magnetic iron (ferric oxide) in the smelting slag can be reduced to ferrous oxide for slag formation, which can reduce the viscosity of the smelting slag and thereby improve the subsequent sedimentation separation effect. It is convenient to separate the second copper crucible from the reducing slag.
  • the valuable metal oxides such as zinc, lead and antimony are reduced to metal, they are separated into valuable metal fumes due to their volatility, thereby achieving the purpose of recovering valuable metals.
  • the obtained reducing slag flowing dynamics
  • the smelting slag after reduction and smoulding treatment directly enters the sedimentation separation, which can greatly improve the treatment efficiency; on the other hand, the reducing slag directly enters the sedimentation treatment, and can maintain a more stable flow state. In the process, there is only a slight temperature change or even no temperature change. The two reasons make it have better sedimentation effect, which can further improve the recovery rate of the second copper matte.
  • the smelting slag When the settling chamber 32 is in communication with the smelting slag outlet, and the reducing smoky chamber 31 is in communication with the settling chamber 32, the smelting slag can be first subjected to sedimentation treatment, and then subjected to reduction smoulding treatment. In this way, the copper ruthenium in the smelting slag can be separated first, and then the reduction smoulding treatment stage can be carried out to further recover valuable metals such as zinc therein. It should be noted that the present invention more preferably adopts a method of first reducing the post-smoothing sedimentation treatment, compared to the manner of reducing the fuming treatment after the sedimentation.
  • the advantage is that the higher the sedimentation separation temperature, the better the separation effect.
  • the temperature required for the reduction of flue gas is very high (1200 to 1400 ° C). Therefore, the temperature of the material after the first reduction of flue gas is high, and separation can be achieved in the sedimentation stage without additional heating.
  • this method of first reducing the post-smoothing sedimentation treatment can also replenish the sedimentation treatment.
  • the method of reducing the flue gas after sedimentation and separation is inevitably required to replenish heat during the sedimentation process.
  • the specific heating method can be as follows: the electrode can be heated or insulated in the settling section (for example, 3 to 6 electrodes can be set), and/or the submerged combustion nozzle can be provided (the submerged combustion nozzle ejects fuel and oxygen, and the amount of oxygen Control is in the state of incomplete combustion of the fuel).
  • the method of first reducing the post-smoothing sedimentation treatment has the following advantages: after the reducing slag stays in the settling chamber for a certain period of time, the sedimentation stratification of the dross can be more fully realized, the harmless slag is discharged from the upper part, and the second copper slag is discharged from the lower part. release.
  • a partition wall 33 is further disposed in the cavity to divide the cavity into a reduction smoulding chamber 31 and a sedimentation chamber 32, and the reduction smoulding chamber 31 and the sedimentation chamber 32 are respectively located in the horizontal direction. Both sides of the wall 33, and the communication passages of the reduction smoky chamber 31 and the settling chamber 32 are disposed near the bottom of the chamber.
  • a fluid melt which reacts in the reduction smoulding chamber 31 and a melt which is subjected to sedimentation treatment in the sedimentation chamber can achieve a smoother flow, and the partition wall can block the reduction smog chamber.
  • the agitation and the floating material on the surface further enhance the effect of the sedimentation treatment.
  • the partition wall 33 is a water-cooled partition wall.
  • the reduction smoulding chamber 31 is further provided with: a second lance and a feed port, the second lance being disposed at a side of the reduction smoulding chamber 31 for adding a reduction to the reduction smoulding chamber 31
  • the feed port is disposed at the top of the reduction smoulding chamber 31 for adding a collector to the reduction smoulding chamber 31.
  • the settling chamber 32 is also provided with a heating device for holding or warming the settling chamber 32.
  • the heating device is an immersion combustion nozzle or electrode (specifically as described above)
  • the second copper ruthenium outlet is for discharging the second copper sulphur
  • the smelting furnace 10 is further provided with a second copper ruthenium inlet for passing the cooled second copper ruthenium into the smelting furnace 10 .
  • the copper smelting apparatus shown in Fig. 1 is used for copper smelting, and the process conditions of each apparatus are as follows:
  • Melting furnace melting temperature is 1300 ° C; flux is quartz stone, the amount of addition is 10% of the total weight of copper ore; oxidant is oxygen, the amount of addition is 150Nm 3 O 2 per ton of copper ore;
  • the flux is quartz stone, which is added in an amount of 20% of the total weight of the first copper crucible; the oxidant is oxygen-enriched air having a volumetric oxygen content of 40%, and the addition amount is 200Nm 3 O per ton of the first copper crucible. 2 ; using a spray gun to spray oxidant into the coppermaking furnace, also spray water mist; at the same time add cold waste copper to the coppermaking furnace; the reducing agent is pulverized coal, before the reducing agent is sprayed, the copper slag is firstly sprayed After the discharge, the copper slag is cooled and returned to the smelting furnace.
  • CR furnace first reduction of fuming, post-sedimentation; in the step of reducing fuming treatment, the reaction temperature is 1200 ° C; the reducing agent is pulverized coal, the amount of addition is 10% of the total weight of the smelting slag; a small amount of oxygen is supplied to provide combustion-supporting Heat; sulfur dioxide gas is introduced into the settling chamber, and the vulcanizing agent pyrite is added to make low-grade copper bismuth; the low-grade copper bismuth obtained is returned to the melting furnace.
  • Treatment results 1 million tons of copper concentrate per year, 20% copper in concentrate, 2% zinc; smelting output 250,000 tons of copper, 75% copper, 650,000 tons of smelting, 3% copper, smelting
  • the slag contains 2.77% zinc; the copper-making furnace produces 235,000 tons of anode copper, 99.3% copper, and 0.05% sulfur; the smelting slag is treated with CR furnace (reduction ashing and sedimentation), the slag contains 0.3% copper, and the slag contains zinc. 0.28%.
  • the copper recovery rate of the entire system is about 99%, and the zinc recovery rate is about 80%.
  • the treatment method is the same as that of the first embodiment, except that the copper ore raw materials are different, as follows:
  • the processing method is the same as that in Embodiment 1, except that:
  • Melting furnace melting temperature is 1300 ° C; flux is quartz stone, the amount of addition is 20% of the total weight of copper ore; oxidant is oxygen, the amount of addition is 200Nm 3 O 2 per ton of copper ore;
  • Treatment results 1 million tons of copper concentrate per year, 20% copper in concentrate, 2% zinc; 260,000 tons of copper smelting, 78% copper, 620,000 tons of smelting slag, 4% copper, smelting
  • the slag contains 2.05% zinc; the copper-making furnace produces 236,000 tons of anode copper, 99.5% copper, 0.03% sulfur; the smelting slag is treated with CR furnace (reduction ashing and sedimentation), the slag contains 0.2% copper, and the slag contains zinc. 0.26%.
  • the copper recovery rate of the entire system is about 99%, and the zinc recovery rate is about 82%.
  • the processing method is the same as that in Embodiment 1, except that:
  • the melting temperature is 1150 ° C;
  • the flux is quartz stone, the amount of addition is 1% of the total weight of the copper ore;
  • the oxidant is oxygen, the amount of addition is 120Nm 3 O 2 per ton of copper ore;
  • Treatment results 1 million tons of copper concentrate per year, 20% copper in concentrate, 2% zinc; 260,000 tons of copper smelting, 70% copper, 700,000 tons of smelting, 2.5% copper, smelting
  • the slag contains 3.25% zinc; the copper making furnace produces 231,000 tons of anode copper, containing 99.1% copper and 0.03% sulfur; the smelting slag is treated by CR furnace (reduction ashing and sedimentation), the slag contains 0.3% copper, and the slag contains zinc. 0.27%.
  • the copper recovery rate of the entire system is about 99%, and the zinc recovery rate is about 80%.
  • the processing method is the same as that in Embodiment 1, except that:
  • the melting temperature is 1100 ° C;
  • the flux is quartz stone, the amount of addition is 0.8% of the total weight of the copper ore;
  • the oxidant is oxygen, the amount of addition is 90Nm 3 O 2 per ton of copper ore;
  • Treatment results 1 million tons of copper concentrate per year, 20% copper in concentrate, 2% zinc; smelting output 200,000 tons of copper, 65% copper, 780,000 tons of smelting, 5% copper, smelting
  • the slag contains 4.71% zinc; the copper making furnace produces 228,000 tons of anode copper, 98.0% copper, and 0.1% sulfur; the smelting slag is treated with CR furnace (reduction ashing and sedimentation), the slag contains 0.6% copper, and the slag contains zinc. 0.49%.
  • the overall system copper recovery rate is about 95%, and the zinc recovery rate is about 78%.
  • the processing method is the same as that in Embodiment 1, except that:
  • the flux is quartz stone, which is added in an amount of 20% of the total weight of the first copper crucible; the oxidant is oxygen-enriched air having an oxygen volume content of 80%, and the addition amount is 120Nm 3 O per ton of the first copper crucible. 2 ; using a spray gun to spray oxidant into the copper making furnace, also spray water mist; at the same time, add cold waste copper to the copper making furnace; the reducing agent is pulverized coal; before the reducing agent is sprayed, the copper slag is firstly sprayed Drain, cool and return to the melting furnace.
  • Treatment results 1 million tons of copper concentrate per year, 20% copper in concentrate, 2% zinc; smelting output 250,000 tons of copper, 75% copper, 650,000 tons of smelting, 3% copper, smelting
  • the slag contains 2.77% zinc; the copper-making furnace produces 246,000 tons of anode copper, 99.5% copper, 0.03% sulfur; the smelting slag is treated with CR furnace (reduction ashing and sedimentation), the slag contains 0.4% copper, and the slag contains zinc. 0.32%.
  • the copper recovery rate of the whole system is about 99.6%, and the zinc recovery rate is about 80%.
  • the processing method is the same as that in Embodiment 1, except that:
  • the flux is quartz stone, which is added in an amount of 20% of the total weight of the first copper crucible; the oxidant is oxygen-enriched air having an oxygen volume content of 30%, and the addition amount is 140Nm 3 O per ton of the first copper crucible. 2 ; using a spray gun to spray oxidant into the copper making furnace, also spray water mist, while adding cold waste copper to the copper making furnace; reducing agent is pulverized coal; before spraying the reducing agent, first make copper slag Drain, cool and return to the melting furnace.
  • Treatment results 1 million tons of copper concentrate per year, 20% copper in concentrate, 2% zinc; smelting output 250,000 tons of copper, 75% copper, 650,000 tons of smelting, 3% copper, smelting
  • the slag contains 2.77% zinc; the copper-making furnace produces 220,000 tons of anode copper, 98.8% copper, 0.03% sulfur; the smelting slag is treated with CR furnace (reduction ashing and sedimentation), the slag contains 0.5% copper, and the slag contains zinc. 0.34%.
  • the overall system copper recovery rate is about 98.7%, and the zinc recovery rate is about 75%.
  • the processing method is the same as that in Embodiment 1, except that:
  • the flux is quartz stone, which is added in an amount of 20% of the total weight of the first copper crucible;
  • the oxidant is oxygen-enriched air having a volume content of 25% oxygen, and the addition amount is 140Nm 3 O per ton of the first copper crucible. 2 ;
  • the reducing agent is pulverized coal; no water mist is sprayed, and no cold material is added;
  • Treatment results 1 million tons of copper concentrate per year, 20% copper in concentrate, 2% zinc; smelting output 250,000 tons of copper, 75% copper, 650,000 tons of smelting, 3% copper, smelting
  • the slag contains 2.77% zinc; the copper-making furnace produces 182,000 tons of anode copper, 97.6% copper, and 0.12% sulfur.
  • the slag contains 0.41% copper and the slag contains zinc 0.50. %.
  • the copper recovery rate of the entire system is about 95%, and the zinc recovery rate is about 70%.
  • the processing method is the same as that in Embodiment 1, except that:
  • CR furnace first reduction of fuming, post-sedimentation; in the step of reducing fuming treatment, the reaction temperature is 1350 ° C; the reducing agent is pulverized coal, the amount of addition is 10% of the total weight of the smelting slag; a small amount of oxygen is supplied to provide heat;
  • the low-grade copper bismuth is formed by adding a vulcanizing agent pyrite; sulfur dioxide gas is introduced into the sedimentation chamber, and the low-grade copper bismuth is returned to the melting furnace.
  • Treatment results 1 million tons of copper concentrate per year, 20% copper in concentrate, 2% zinc; smelting output 250,000 tons of copper, 75% copper, 650,000 tons of smelting, 3% copper, smelting
  • the slag contains 2.77% zinc; the copper-making furnace produces 235,000 tons of anode copper, 99.3% copper, and 0.05% sulfur; the smelting slag is treated with CR furnace (reduction ashing and sedimentation), the slag contains 0.1% copper, and the slag contains zinc. 0.19%.
  • the overall system copper recovery rate is about 99%, and the zinc recovery rate is about 85%.
  • the processing method is the same as that in Embodiment 1, except that:
  • CR furnace first settling, then reducing fuming; in the step of reducing fuming treatment, the reaction temperature is 1350 ° C; the reducing agent is pulverized coal, the amount of addition is 10% of the total weight of the smelting slag; a small amount of oxygen is supplied to provide heat; The settling chamber performs electrode heating.
  • Treatment results 1 million tons of copper concentrate per year, 20% copper in concentrate, 2% zinc; smelting output 250,000 tons of copper, 72% copper, 630,000 tons of smelting, 3.5% copper, smelting
  • the slag contains 2.63% zinc; the copper making furnace produces 240,000 tons of anode copper, 99.3% copper, and 0.05% sulfur; the smelting slag is treated with CR furnace (reduction ashing and sedimentation), the slag contains 0.6% copper, and the slag contains zinc. 0.54%.
  • the overall system copper recovery rate is about 98.5%, and the zinc recovery rate is about 68%.
  • the annual processing amount is large, and the anode copper (refers to the copper product whose purity can reach the electrolytic anode copper) has large output, and the recovery rate of the valuable metal is high.
  • the method of adding cold material and spraying water mist into the copper-making furnace greatly improves the oxygen content of the oxidant in the copper-making reaction, so that the reaction can complete the copper-making reaction under the condition of high oxygen-rich concentration without generating overheating.
  • the phenomenon also effectively improves the copper-sulfur production efficiency and the copper content of the anode copper.
  • the technical solution in the eighth embodiment of the present invention also uses the short-flow copper smelting process to effectively recover the valuable metal in the smelting slag, and directly produces the anode.
  • the incorporation of copper into harmless slag is also within the scope of protection of the present invention.
  • the present invention effectively recovers valuable metals in the smelting slag during the smelting process by reducing fuming and sedimentation, thereby realizing resource recovery and reducing environmental pollution.
  • the invention takes the melting furnace as the core and simultaneously shortens the product end and the slag end, thereby greatly simplifying the copper smelting process. It is estimated that the average zinc content in the slag is calculated according to 3%, the recovery rate is calculated according to 80%, and the copper smelting enterprise with 200,000 t/a can recover 19,000 t/a of zinc, which greatly improves the economic benefits of the enterprise and greatly simplifies.
  • the process of slag treatment has greatly reduced the footprint and solved the potential pollution risk of slag tailings.

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PCT/CN2018/085311 2017-06-14 2018-05-02 短流程炼铜方法及系统 WO2018228075A1 (zh)

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RU2020100886A RU2733803C1 (ru) 2017-06-14 2018-05-02 Способ и система для ускоренной выплавки меди
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