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WO2014101688A1 - Procédé et four d'affinage par gonflage par la base de matte de cuivre - Google Patents

Procédé et four d'affinage par gonflage par la base de matte de cuivre Download PDF

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Publication number
WO2014101688A1
WO2014101688A1 PCT/CN2013/089731 CN2013089731W WO2014101688A1 WO 2014101688 A1 WO2014101688 A1 WO 2014101688A1 CN 2013089731 W CN2013089731 W CN 2013089731W WO 2014101688 A1 WO2014101688 A1 WO 2014101688A1
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WO
WIPO (PCT)
Prior art keywords
blowing
bottom blowing
copper
copper matte
furnace
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/CN2013/089731
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English (en)
Chinese (zh)
Inventor
尉克俭
蒋继穆
张振民
陆志方
黄祥华
李锋
李兵
颜杰
胡立琼
郝小红
陆金忠
林晓芳
李东波
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
China ENFI Engineering Corp
Original Assignee
China ENFI Engineering Corp
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
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First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=47963481&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2014101688(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Application filed by China ENFI Engineering Corp filed Critical China ENFI Engineering Corp
Priority to RU2015119158A priority Critical patent/RU2647418C2/ru
Publication of WO2014101688A1 publication Critical patent/WO2014101688A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • C22B15/00—Obtaining copper
    • C22B15/0026—Pyrometallurgy
    • C22B15/006—Pyrometallurgy working up of molten copper, e.g. refining

Definitions

  • the metallurgical method of copper is divided into fire method and wet method.
  • the process of fire copper smelting is mainly to obtain copper concentrate after flotation of copper sulfide concentrate, and then smelting in electric furnace, flash furnace and other melting furnace to obtain copper bismuth.
  • the copper matte is blown to obtain crude copper, and the crude copper fire method is refined to obtain anode copper, and then electrolytically refined to obtain electric copper.
  • the copper crucible is usually blown by a PS converter, and the liquid copper crucible is added to the PS converter, and oxygen is blown from the side of the PS converter to obtain crude copper and blowing slag.
  • an object of the present invention is to provide a copper crucible bottom blowing and blowing process, which can realize continuous blowing of copper crucibles by using the copper crucible bottom blowing and blowing process, and generates less flue gas, and is compatible with the PS converter. It has higher and stable concentration than S0 2 in flue gas, good operating environment, good environmental protection, high efficiency, and low production cost of blister copper and sulfuric acid.
  • Another object of the present invention is to provide a copper beryllium bottom blowing furnace which can realize the above process.
  • a copper crucible bottom blowing and blowing process comprising the steps of: adding a copper crucible and a flux to a copper crucible bottom to blow In the refining furnace; continuously blowing an oxygen-containing gas into the melt in the copper crucible bottom blowing furnace from the bottom of the copper crucible bottom blowing furnace by using a bottom blowing lance; and blowing from the bottom of the copper crucible
  • the crude copper and the blowing slag are separately discharged in the converting furnace.
  • the blister copper layer C1 is located below the copper enamel layer C2, and the bottom blowing lance does not need to pass through the blister copper layer C1 by continuously blowing the oxygen-containing gas into the blister copper layer C1.
  • This can increase the life of the bottom blowing gun.
  • the bottom-blowing lance can be prevented from protruding into the furnace body too much (for example, the length of the bottom-blowing lance extending into the furnace body can be less than 50 In millimeters, the loss of the bottom blowing gun is reduced, the service life of the copper bottom blowing furnace is prolonged, and the running cost of the copper bottom blowing furnace is reduced.
  • the amount of oxygen-containing gas entering the slag layer is reduced, and since the copper ruthenium layer C2 is thin, the oxygen-containing gas sprayed from the bottom blowing lance easily passes through the copper ruthenium layer C2 into the slag layer, thereby causing waste of the oxygen-containing gas.
  • the amount of oxygen-containing gas can be reduced to further reduce the cost.
  • the oxygen potential in the blister copper layer can be maximized, and the impurity elements (S, As, Sb, Bi, Pb, etc.) which are intercalated in the blister copper layer are first introduced. Oxidation is removed to obtain high quality blister copper.
  • the oxygen-containing gas can also use blister copper as a carrier to react with Cu 2 S and CuS in the copper bismuth layer C2 to form Cu and S0 2 in the form of Cu 2 0 and CuO, and react with FeS in the copper bismuth layer to form FeO, 80. 2 and Cu.
  • the copper crucible bottom blowing process can reduce the amount of Fe 3 0 4 formed, prevent precipitation of Fe 3 0 4 and formation of foaming slag. Since the content of Fe 3 0 4 in the blowing slag is low, the viscosity of the blowing slag is low, and the amount of Cu 2 0 in the blowing slag can be reduced (for example, the copper content of the blowing slag can be less than 14%, even Less than 10%).
  • the reaction time of the oxygen-containing gas is increased, the utilization rate of the oxygen-containing gas is improved, and the quality of the blister copper is improved. Further, by continuously blowing an oxygen-containing gas into the blister copper layer, the total amount of gas blown per unit time can be reduced, so that the risk of the furnace can be reduced.
  • the oxygen-containing gas is continuously blown into the copper layer of the melt.
  • the tilting angle of the furnace body can be reduced, the volume utilization rate of the furnace body can be improved, and the bottom blowing spray gun can be easily maintained.
  • the copper matte is a solid copper matte.
  • the solid copper beryllium can be processed, and the addition of the copper beryllium can be more easily and accurately performed by adding a solid copper beryllium to the copper crucible bottom blowing furnace.
  • the amount is measured, and the ratio of the amount of the copper ruthenium to the oxygen-containing gas (oxygen amount) can be controlled more easily and accurately.
  • oxygen amount the ratio of the amount of the copper ruthenium to the oxygen-containing gas
  • the blowing process can be controlled more easily, so that the melt in the converting furnace exists in two phases of blister copper and blowing slag, and there is no or almost no copper ruthenium layer (or white ruthenium layer). Through this control, It can further improve the blowing effect and reduce the sulfur content of blister copper and other impurities (such as arsenic, antimony, antimony, lead, etc.).
  • the ratio of the amount of the copper ruthenium to the oxygen-containing gas can be precisely controlled, the excessive copper peroxide can be prevented from being excessively oxidized and the foamed slag is formed, and the oxygen-containing gas can be prevented from being injected too little.
  • Bronze contains more impurities (such as arsenic, antimony, antimony, lead, etc.) for subsequent processing.
  • intermittent feeding can be achieved, that is, a solid copper crucible can be intermittently added to the copper crucible bottom blowing furnace, thereby enabling the The copper crucible bottom blowing process has greater adaptability and a wider range of applications.
  • the solid copper crucible is introduced into the copper crucible bottom blowing furnace through a feed chute or a feed chute or is blown into the copper crucible bottom blowing furnace by a gas stream.
  • the solid copper crucible can be more conveniently and easily added to the copper crucible bottom blowing furnace.
  • the solid copper crucible is continuously added to the beryllium bottom blowing furnace.
  • the copper crucible can be continuously processed, and continuous oxygen blowing is combined to further improve the processing efficiency.
  • the angle ⁇ between the bottom blowing lance and the direction of the vertical upward is -60 degrees to +60 degrees range.
  • the angle ⁇ between the bottom blowing lance and the vertically upward direction is in the range of -20 degrees to +20 degrees.
  • the angle ⁇ between the bottom blowing lance and the direction orthogonal to the axial direction of the copper bottom blowing furnace is in the range of -30 degrees to +30 degrees.
  • the included angle ⁇ is 0 degrees.
  • the beryllium bottom blowing process further comprises adding residual copper and/or scrap copper to the beryllium bottom blowing furnace.
  • residual copper and/or scrap copper By adding residual copper and/or scrap copper to the copper crucible bottom blowing furnace, there is no need to equip the equipment for melting waste copper and residual copper, thereby reducing investment, energy consumption and blowing costs, further Expanded the scope of application of the process.
  • the flux is at least one of a mixture of limestone, lime, quartz, quartz and lime, and a mixture of quartz and limestone.
  • the blister copper is continuously discharged by siphoning.
  • the blowing temperature in the copper crucible bottom blowing furnace is 1150-1300 degrees Celsius. According to an embodiment of the present invention, the blowing temperature in the copper-bottomed bottom blowing furnace is 1180-1250 degrees Celsius.
  • the ventilated gas is 0. 2-0. 8MPa.
  • the gas pressure of the furnace is 0. 4-0. 6MPa.
  • the oxygen-containing gas has an oxygen concentration of 20-99.6%.
  • the oxygen-containing gas has an oxygen concentration of 30-75%.
  • the bottom blowing lance is also sprayed with nitrogen into the beryllium bottom blowing furnace.
  • nitrogen gas By spraying nitrogen gas, not only the spray gun can be cooled, but also the melt in the copper crucible bottom blowing furnace can be stirred to further improve the blowing effect. Nitrogen is injected into the blister copper layer to improve the quality of the blister copper.
  • the copper bottom blowing process further includes passing a first cooling water jacket disposed between the outer circumference of the bottom blowing gun and the furnace body of the copper bottom blowing furnace Or a permeable brick to cool the bottom blow gun.
  • a first cooling water jacket disposed between the outer circumference of the bottom blowing gun and the furnace body of the copper bottom blowing furnace Or a permeable brick to cool the bottom blow gun.
  • the slag layer region of the copper beryllium bottom blowing furnace is provided with a second cooling water jacket. This further extends the service life of the copper crucible bottom blowing furnace.
  • the first and second cooling water jackets are copper water jackets. Compared with traditional stainless steel water jackets, copper water jackets have the advantages of good cooling effect and long service life.
  • the feed port includes a first feed port for adding copper crucible and a flux to the furnace chamber and for adding residual copper and/or waste copper to the furnace cavity.
  • the second feed port is a first feed port for adding copper crucible and a flux to the furnace chamber and for adding residual copper and/or waste copper to the furnace cavity.
  • the feeding port shares an opening with the outlet. Therefore, the number of openings of the copper crucible bottom blowing furnace can be reduced, the processing difficulty can be reduced, the sealing performance can be improved, the air leakage amount of the furnace body can be reduced, and the environmental protection performance can be further improved.
  • the bottom blowing lance continuously blows the oxygen-containing gas into the blister copper layer of the melt.
  • the bottom blowing lance continuously blows the oxygen-containing gas into the copper ruthenium layer of the melt.
  • the copper matte is in a solid state.
  • the furnace body is a rotatable cylindrical horizontal container. By turning, it is easy to replace the bottom blow gun.
  • the bottom blowing lance is disposed below the horizontal centerline of the furnace body.
  • the angle ⁇ between the bottom blowing lance and the vertically upward direction is in the range of -120 degrees to +120 degrees.
  • the angle ⁇ between the bottom blowing lance and the direction of the vertical direction is in the range of -60 degrees to +60 degrees.
  • the angle ⁇ between the bottom blowing gun and the direction of the vertical upward is -30 degrees to
  • the angle ⁇ between the bottom blowing lance and the vertically upward direction is in the range of -20 degrees to +20 degrees.
  • the angle ⁇ between the bottom blowing lance and the direction orthogonal to the axial direction of the copper bottom blowing furnace is in the range of -30 degrees to +30 degrees.
  • the angle ⁇ between the bottom blowing lance and the direction orthogonal to the axial direction of the copper bottom blowing furnace is 0 degree.
  • a first cooling water jacket or a permeable brick is disposed between the outer circumference of the bottom blowing lance and the furnace body.
  • the slag layer region of the copper beryllium bottom blowing furnace is provided with a second cooling water jacket. This further extends the service life of the copper crucible bottom blowing furnace.
  • the first and second cooling water jackets are copper water jackets.
  • the copper water jacket has the advantages of good cooling effect and long service life.
  • FIG. 1 is a schematic view of a copper beryllium bottom blowing furnace according to an embodiment of the present invention
  • Figure 3 is a transverse cross-sectional view of a furnace body of a copper beryllium bottom blowing furnace according to another embodiment of the present invention.
  • FIG. 4 is a schematic view of a projection of a copper-bottomed bottom blowing furnace in a vertical plane in accordance with one embodiment of the present invention
  • FIG. 5 is a flow chart of a copper-bottomed bottom blowing process in accordance with one embodiment of the present invention.
  • orientation or positional relationship of the indications such as “outside”, “clockwise”, “counterclockwise” and the like is based on the orientation or positional relationship shown in the drawings, and is merely for the convenience of describing the present invention and simplifying the description, rather than indicating or implying
  • the device or component must have a particular orientation, configuration and operation in a particular orientation, and thus is not to be construed as limiting the invention.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” and “second” may explicitly or implicitly include one or more of the features.
  • the meaning of “plurality” is two or more, unless specifically defined otherwise.
  • the terms “installation”, “connected”, “connected”, “fixed” and the like are to be understood broadly, and may be either a fixed connection or a detachable connection, unless otherwise explicitly stated and defined. , or connected integrally; can be mechanical or electrical; can be directly connected, or indirectly connected through an intermediate medium, can be the internal communication of the two components.
  • the specific meaning of the above terms in the present invention can be understood by those skilled in the art on a case-by-case basis.
  • the first feature "on” or “under” the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. It is not in direct contact but through additional features between them.
  • the first feature "above”, “above” and “above” the second feature includes the first feature being directly above and above the second feature, or merely indicating that the first feature is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature includes the first feature directly below and below the second feature, or merely indicating that the first feature level is less than the second feature.
  • a copper beryllium bottom blowing furnace according to an embodiment of the present invention may be used to perform a copper beryllium bottom blowing process according to an embodiment of the present invention, it being understood that the copper beryllium bottom blowing melting process according to an embodiment of the present invention is not It is limited to the use of a copper beryllium bottom blowing furnace described in accordance with an embodiment of the present invention.
  • a copper beryllium bottom blowing furnace 1 according to an embodiment of the present invention includes a furnace body 10 and a bottom blowing gun 20.
  • the furnace body 10 has a furnace chamber 101 having a charging port 102 for adding material containing copper matte into the furnace chamber 101, a slag discharging port 103 for discharging the blowing slag, and a coarse discharging copper for discharging A copper discharge port 104, a smoke outlet 105 for discharging the flue gas, and a spray gun jack 106 provided at the bottom of the furnace body 10.
  • the bottom blowing lance 20 is inserted into the lance jack 106 for continuously blowing oxygen-containing gas into the melt in the furnace chamber 101.
  • the copper crucible can be blown by blowing oxygen-containing gas at the bottom, the environmental protection performance is good, the pollution is reduced, the amount of smoke generated is small, the concentration is stable, and the quality of the crude copper is high.
  • the blowing slag contains less copper, can treat the copper bismuth produced by various smelting furnaces, can be continuously smelted, has higher efficiency, can be used to blow liquid and solid copper enamel, and has high applicability.
  • the material added to the cavity 101 may be a copper crucible and a flux.
  • the residual copper and/or the waste copper may also be added through the feed port 102, thereby eliminating the need to equip the equipment for melting the waste copper and the residual copper. Investment, energy consumption and blowing costs have further expanded the scope of the process.
  • the feed port 102 can be divided into a first feed port for adding copper crucible and flux into the cavity 101 and a second feed port for adding residual copper and/or waste copper to the cavity 101.
  • the first feed port can be further divided into a copper feed port and a flux feed port
  • the second feed port can be further divided into a residual feed port and a waste copper feed port.
  • the feed port 102 can be the same opening as the smoke outlet 105, thereby reducing the number of openings of the furnace body 10 and reducing manufacturing costs.
  • the vent 105 may share an opening with any of the first and second feed ports, or the vent 105 may be associated with any of the copper hopper feed port, the flux feed port, the residual charge port, and the scrap copper feed port. One or more share one opening.
  • the lance jack 106 may be plural and a plurality of lance jacks 106 may be formed at the bottom of the furnace body 10 at intervals, it being understood that the term herein is " The bottom portion should be understood in a broad sense, including any suitable location below the horizontal centerline X of the furnace body 10, preferably, the spray gun is immediately below the furnace body 10, as will be described in more detail below.
  • the bottom blowing lance 20 may be a plurality and a plurality of bottom blowing lances 20 may be correspondingly inserted into the plurality of lance jacks 106, respectively, ⁇ ⁇ , and a bottom blowing lance 20 may be inserted into a lance hub 106.
  • the oxygen-containing gas can be more uniformly blown into the blister copper layer C1, thereby further improving the quality of the blister copper.
  • the oxygen-containing gas should be understood in a broad sense, and includes, for example, pure oxygen, an oxygen-rich gas, and an oxygen-containing air.
  • the oxygen-containing gas is oxygen-enriched air, such as oxygen-enriched air having an oxygen concentration of 70% or more.
  • the bottom blowing lance 20 may be provided below the horizontal center line X of the furnace body 10 of the copper beryllium bottom blowing furnace 1.
  • the MPa is 0. 2MP a -0. 8MPa. 5MPa-0. 6MPa ⁇
  • the gas pressure of the furnace is 0. 4MPa-0. 6MPa.
  • the oxygen concentration of the oxygen-containing gas may be from 20% to 99.6%. Further, the oxygen-containing gas may have an oxygen concentration of 30% to 75%.
  • the furnace body 10 can be a rotatable cylindrical horizontal vessel. By rotating the furnace body 10, the bottom blowing lance 20 can be easily replaced and repaired, and the melt in the furnace chamber 101 can be emptied during maintenance time.
  • the beryllium bottom blowing furnace 1 further includes a bracket 30, a bracket 40, a ring gear 50, and a driving device 60.
  • the collar 40 is sleeved on the furnace body 10 and rotatably supported on the bracket 30.
  • the ring gear 50 is sleeved on the outer surface of the furnace body 10.
  • the drive unit 60 is coupled to the ring gear 50 to drive the furnace body 10 to rotate by driving the ring gear 50 to rotate.
  • the driving device 60 can include, for example, a motor, a speed reducer connected to the motor, and gears, gears and teeth can be mounted on the output shaft of the speed reducer.
  • the ring 50 is engaged to drive the ring gear 50 to rotate.
  • the furnace body 10 is rotated on the bracket 30 by the ring gear 50. Since the furnace body 10 can be rotated, it is convenient to replace the bottom blowing gun 20 and other operations.
  • the angle ⁇ between the bottom blasting gun 20 and the vertically upward direction may be in the range of -120 degrees to +120 degrees, i.e., -120 degrees ⁇ + 120 degrees.
  • the angle between the discharge direction of the bottom blowing lance 20 and the direction in the vertical direction is in the range of -120 degrees to +120 degrees.
  • the angle ⁇ from the counterclockwise direction to the vertical direction of the blowing direction of the bottom blowing lance 20 is positive, from the blowing direction of the bottom blowing lance 20 to the clockwise direction to the vertical direction.
  • the angle ⁇ in the upward direction is negative.
  • the angle ⁇ between the bottom blowing lance 20 and the vertically upward direction may be in the range of -60 degrees to +60 degrees, i.e., -60 degrees a + 60 degrees.
  • the angle between the bottom blasting gun 20 and the direction of the vertical upward is in the range of -30 degrees to +30 degrees, ⁇ ⁇ -30 degrees ⁇ + 30 degrees.
  • the angle between the bottom blasting gun 20 and the direction of the vertical direction is in the range of -20 degrees to +20 degrees, ⁇ ⁇ -20 degrees ⁇ + 20 degrees. This can improve the blowing effect.
  • the angle ⁇ between the bottom blasting gun 20 and the direction orthogonal to the axial direction of the furnace body 10 is between -30 degrees and +30 degrees. In the range. More preferably, the angle ⁇ is 0 degrees, that is, the bottom blowing gun 20 is oriented in the vertical direction.
  • a permeable brick or a first cooling water jacket is provided between the outer periphery of the bottom blowing lance 20 and the furnace body 10.
  • the permeable brick can cool the bottom blowing lance 20 and improve the fluidity of the melt in the cavity 101 to improve the blowing effect.
  • nitrogen gas can be injected into the furnace chamber 101 through the permeable bricks, thereby better cooling the bottom blowing lance 20 and better agitating the melt in the furnace chamber 101.
  • the cooling water jacket passes through the cooling water to cool the bottom blowing gun 20.
  • the slag layer region of the furnace chamber 101 is provided with a second cooling water jacket.
  • the first and second cooling water jackets are copper water jackets. Compared with the traditional steel water jacket, the copper water jacket has the advantages of good cooling effect and long service life.
  • the bottom blowing lance 20 continuously blows an oxygen-containing gas into the copper ruthenium layer C2 of the melt. More preferably, the bottom blowing lance 20 continuously blows an oxygen-containing gas into the blister copper layer C1 of the melt.
  • a copper beryllium bottom blowing furnace can be used to treat copper crucibles obtained by melting in various melting furnaces.
  • the solid beryllium crucible is treated in accordance with an embodiment of the present invention.
  • a copper beryllium bottom blowing process according to an embodiment of the present invention will now be described with reference to FIG. 5 in conjunction with FIGS. As shown in FIG. 5, the copper beryllium bottom blowing process according to an embodiment of the present invention includes the following steps:
  • the copper crucible and the flux are added into the furnace chamber 101; the oxygen-containing gas is continuously blown from the bottom of the furnace body 10 into the melt in the furnace chamber 101 by the bottom blowing lance 20; and the blister copper is discharged from the furnace chamber 101, respectively. Blowing slag.
  • the oxygen-containing gas is continuously blown from the bottom of the copper crucible bottom blowing furnace to the melt in the copper crucible bottom blowing furnace by using a bottom blowing lance.
  • Continuous blowing can be realized, efficiency is improved, cost is reduced, and the amount of flue gas is small, the concentration of flue gas is stable, the flue gas escapes less, the environmental protection performance is good, the pollution is reduced, the quality of crude copper is high, and the copper content in the blowing slag reduce.
  • the continuous blowing of the oxygen-containing gas into the cavity 101 means: During normal production, the oxygen-containing gas is continuously blown continuously, and the bottom-blowing gun 20 can be prevented from being damaged. Of course, when the copper-bottomed bottom blowing furnace appears The bottom blow gun 20 also needs to stop blowing during a mistake or normal maintenance. Compared with the conventional side of the conventional PS converter, the amount of air supplied per unit time is reduced, the amount of smoke per unit time is small, the thermal stability is good, the cost and energy consumption are low, and the efficiency is high.
  • the bottom blowing lance 20 continuously blows oxygen-containing gas from the bottom of the furnace body 10 into the copper ruthenium layer C2 in the furnace chamber 101.
  • the tilting angle of the furnace body 10 can be reduced, the volume utilization ratio of the furnace body 10 can be improved, and the bottom blowing lance 20 can be easily maintained.
  • the bottom blowing lance 20 continuously blows oxygen containing gas from the bottom of the furnace body 10 into the blister copper layer C1 in the furnace chamber 101.
  • the melt in the furnace chamber 101, can be divided into three parts (three phases): a thick copper layer Cl, a copper layer (or a white copper layer) C2 and a blowing layer C3, Ll, L2.
  • L3 are the blister copper liquid line, the copper sap liquid line and the slag liquid level line. In the case of three-phase coexistence, it is beneficial to reduce the copper content of the slag and improve the safety.
  • the beneficial effect of blowing the oxygen-containing gas into the blister copper layer is: in the copper sinter bottom blowing furnace, the blister copper layer C1 is located below the copper ruthenium layer C2, and the oxygen-containing gas is continuously blown into the blister copper layer C1.
  • the bottom blowing spray gun does not need to pass through the thick copper layer C1, which can improve the life of the bottom blowing spray gun.
  • the bottom-blowing lance can be prevented from protruding into the furnace body too much (for example, the length of the bottom-blowing lance extending into the furnace body can be less than 50 In millimeters, the loss of the bottom blowing gun is reduced, the service life of the copper bottom blowing furnace is prolonged, and the running cost of the copper bottom blowing furnace is reduced.
  • the amount of oxygen-containing gas entering the slag layer is reduced, and since the copper ruthenium layer C2 is thin, the oxygen-containing gas sprayed by the bottom blowing lance easily passes through the copper ruthenium layer C2 and enters the slag layer, thereby causing waste of oxygen-containing gas.
  • the amount of oxygen-containing gas can be reduced to further reduce the cost.
  • the oxygen potential in the blister copper layer can be maximized, and the impurity elements (S, As, Sb, Bi, Pb, etc.) which are intercalated in the blister copper layer are first introduced. Oxidation is removed to obtain high quality blister copper.
  • the oxygen-containing gas can also be used as a carrier to react with Cu 2 S and CuS in the copper bismuth layer C2 in the form of Cu 2 0 and CuO.
  • the copper crucible bottom blowing process can reduce the amount of Fe 3 0 4 formed, prevent precipitation of Fe 3 0 4 and formation of foaming slag. Since the content of Fe 3 0 4 in the blowing slag is low, the viscosity of the blowing slag is low, and the amount of Cu 2 0 in the blowing slag can be reduced (for example, the copper content of the blowing slag can be less than 14%, even Less than 10%).
  • the reaction time of the oxygen-containing gas is increased, the utilization rate of the oxygen-containing gas is improved, and the quality of the blister copper is improved. Further, by continuously blowing an oxygen-containing gas into the blister copper layer, the total amount of gas blown per unit time can be reduced, so that the risk of the furnace can be reduced.
  • the furnace temperature can be stabilized, the disadvantage of excessive fluctuation of the operating temperature of the converter cycle is overcome, and the service life of the copper crucible bottom blowing furnace is greatly improved. , reducing refractory consumption and maintenance workload, thereby reducing coppermaking costs.
  • the copper crucible bottom blowing and blowing process can stably balance the amount of flue gas and the S0 2 content in the flue gas, and the furnace body does not need to rotate frequently, so that the air leakage rate is greatly reduced, and the smoke volume and smoke of the converter cycle are overcome.
  • the disadvantage of large fluctuations in gas composition is conducive to acid production and reduces investment and operating costs of the acid plant.
  • the furnace chamber 101 After a batch of copper matte is added to the furnace chamber 101 to blow out the blister copper, only the blister copper is discharged.
  • the copper oxide in the first blowing slag can be reduced, thereby reducing the copper content of the blowing slag.
  • the copper matte may be a solid copper matte.
  • the copper matte can be added to the furnace cavity 101 in a solid form.
  • the copper beryllium bottom blowing process according to the embodiment of the present invention can process the solid copper beryllium, and the amount of the copper beryllium can be more easily and accurately added by adding the solid copper beryllium to the copper crucible bottom blowing furnace.
  • the metering is performed, and the ratio of the amount of copper bismuth to the oxygen-containing gas (oxygen amount) can be controlled more easily and accurately. This makes it easier to control the blowing process so that the melt in the converting furnace exists in both blister copper and blown slag, with no or almost no There is a copper layer (or white copper layer).
  • the melt in the furnace chamber 101 may also be two-part (two-phase), the blister copper layer C1 and The slag layer C3 is blown, that is, the copper mash enters the furnace chamber 101 and is blown into blister copper and blown slag.
  • the blister copper has high quality and low impurities.
  • the ratio of the amount of the copper ruthenium to the oxygen-containing gas can be precisely controlled, the excessive copper peroxide can be prevented from being excessively oxidized and the foamed slag is formed, and the oxygen-containing gas can be prevented from being injected too little.
  • Bronze contains more impurities (such as arsenic, antimony, antimony, lead, etc.) for subsequent processing.
  • intermittent feeding can be achieved, that is, a solid copper crucible can be intermittently added to the copper crucible bottom blowing furnace, thereby enabling the The copper crucible bottom blowing process has greater adaptability and a wider range of applications.
  • the liquid copper crucible may be subjected to water pulverization, dry granulation or cooling to be crushed to obtain a solid copper ruthenium.
  • the solid copper crucible may be fed to the copper crucible bottom blowing furnace 1 through a feed chute or a feed chute, and the solid copper crucible may also be blown into the copper crucible bottom blowing furnace 1 by air flow.
  • the solid copper crucible can be more conveniently and easily added into the copper crucible bottom blowing furnace.
  • the solid copper crucible can be continuously fed into the beryllium bottom blowing furnace 1 .
  • the copper beryllium can be continuously processed, and continuous oxygen blowing is combined to further improve the processing efficiency.
  • the angle ⁇ between the ejection direction of the bottom blowing lance 20 and the vertically upward direction may be in the range of -120 degrees to +120 degrees.
  • the angle ⁇ between the ejection direction of the bottom blowing lance 20 and the vertically upward direction may be in the range of -60 degrees to +60 degrees.
  • the angle ⁇ between the direction of jetting of the bottom blasting lance 20 and the direction of the vertical upward is in the range of -30 degrees to +30 degrees.
  • the angle ⁇ between the ejection direction of the bottom blowing lance 20 and the vertically upward direction is in the range of -20 degrees to +20 degrees.
  • the angle ⁇ between the bottom blowing lance 20 and the direction orthogonal to the axial direction of the beak bottom blowing furnace is in the range of -30 degrees to +30 degrees.
  • the included angle ⁇ is 0 degrees.
  • the beryllium bottom blowing process according to an embodiment of the present invention may further include adding residual copper and/or waste copper to the cavity 101.
  • residual copper and/or scrap copper By adding residual copper and/or scrap copper to the copper crucible bottom blowing furnace 1, there is no need to equip the equipment for melting waste copper and residual copper, thereby reducing investment, energy consumption and blowing costs, and further expanding The scope of the process.
  • the flux may be at least one of limestone, lime, quartz, a mixture of quartz and lime, and a mixture of quartz and limestone.
  • the smelting slag produced by using limestone and lime as a flux is an alkaline slag.
  • the alkaline slag has good fluidity, and the slag contains copper, but the lining is severely eroded.
  • the acid slag produced by using quartz stone as a flux has less erosion on the furnace lining, and can effectively extend the continuous operation time and the service life of the bottom blowing furnace.
  • the present invention further proposes to use a mixture of quartz and lime or a mixture of quartz stone and limestone as a flux slag.
  • the present invention refers to such a slag as a neutral slag.
  • the use of neutral slag can not only reduce the erosion of the lining, but also improve the fluidity to a certain extent, reduce the copper content of the slag, and reduce the risk of foaming slag, which is a more preferable technical solution.
  • the blowing slag can be continuously discharged by overflow.
  • it can also be interrupted by overflow Discharge, or intermittently by means of eye-catching on the furnace body 10.
  • the blister copper can be continuously discharged by siphoning.
  • siphoning Of course, it is also possible to intermittently discharge by means of overflow, or intermittently by means of drilling on the furnace body 10.
  • the copper content of the blowing slag may be 20 wt% or less.
  • the mass percentage of copper in the blowing slag and the blowing slag is 20% or less.
  • the blowing slag has a copper content of less than 15% by weight to reduce the amount of copper returned and the amount of mechanical loss in the blowing slag.
  • the blowing temperature in the beryllium bottom blowing furnace 1 may be from 1150 to 1300 degrees Celsius to maintain the blowing process.
  • the blowing temperature in the beryllium bottom blowing furnace 1 can be from 1180 degrees Celsius to -1250 degrees Celsius to more safely maintain the blowing process.
  • nitrogen gas may be sprayed into the thick copper layer in the copper crucible bottom blowing furnace 1 to agitate the melt to improve the blowing effect and the quality of the crude copper. Nitrogen is injected into the blister copper layer to improve the quality of the blister copper.
  • the bottom blasting gun 20 can be cooled by a first cooling water jacket or permeable brick. Thereby, the life of the bottom blowing lance 20 is increased.
  • the continuous blowing of the copper beryllium can be realized, the amount of generated flue gas is small, the concentration is stable, the environment is environmentally friendly, the quality of the crude copper is improved, and the blowing is performed.
  • the slag contains low copper, high efficiency, low cost and wide application range.
  • the description of the terms “one embodiment”, “some embodiments”, “example”, “specific example”, or “some examples” and the like means a specific feature described in connection with the embodiment or example.
  • a structure, material or feature is included in at least one embodiment or example of the invention.
  • the schematic representation of the above terms does not necessarily mean the same embodiment or example.
  • the particular features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or examples.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Manufacture And Refinement Of Metals (AREA)
  • Vertical, Hearth, Or Arc Furnaces (AREA)

Abstract

La présente invention concerne un procédé d'affinage par gonflage par la base de matte de cuivre et un four (1) d'affinage par gonflage par la base de matte de cuivre. Ledit procédé comprend les étapes suivantes : l'ajout d'une matte de cuivre et d'un flux au four d'affinage par gonflage par la base ; l'utilisation d'un pistolet (20) pour pulvérisation pour gonflage par la base, afin de souffler en continu un gaz contenant de l'oxygène, de la base du four d'affinage vers la fusion dans le four ; et l'évacuation de cuivre brut et de scories respectivement.
PCT/CN2013/089731 2012-12-24 2013-12-17 Procédé et four d'affinage par gonflage par la base de matte de cuivre Ceased WO2014101688A1 (fr)

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CN201210568627.8A CN103014371B (zh) 2012-12-24 2012-12-24 铜锍底吹吹炼工艺和铜锍底吹吹炼炉

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CN113699382A (zh) * 2021-08-27 2021-11-26 上海中川国宇环境有限公司 应用于炉渣资源化的处理装置及处理工艺
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