WO2014203413A1 - 可燃物の処理方法と設備 - Google Patents

可燃物の処理方法と設備 Download PDF

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Publication number
WO2014203413A1
WO2014203413A1 PCT/JP2013/077677 JP2013077677W WO2014203413A1 WO 2014203413 A1 WO2014203413 A1 WO 2014203413A1 JP 2013077677 W JP2013077677 W JP 2013077677W WO 2014203413 A1 WO2014203413 A1 WO 2014203413A1
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WIPO (PCT)
Prior art keywords
furnace
melt
combustible material
copper
smelting furnace
Prior art date
Application number
PCT/JP2013/077677
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English (en)
French (fr)
Japanese (ja)
Inventor
信博 小隈
石川　茂
真言 高木
雄二 水田
Original Assignee
三菱マテリアル株式会社
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.)
Filing date
Publication date
Application filed by 三菱マテリアル株式会社 filed Critical 三菱マテリアル株式会社
Priority to CA2876819A priority Critical patent/CA2876819C/en
Priority to US14/414,789 priority patent/US9745643B2/en
Priority to IN11086DEN2014 priority patent/IN2014DN11086A/en
Priority to KR1020157001569A priority patent/KR101639959B1/ko
Priority to MX2014015452A priority patent/MX353324B/es
Publication of WO2014203413A1 publication Critical patent/WO2014203413A1/ja

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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
    • C22B15/0026—Pyrometallurgy
    • C22B15/0028—Smelting or converting
    • C22B15/0052—Reduction smelting or converting
    • 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
    • C22B15/0056—Scrap treating
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B09—DISPOSAL OF SOLID WASTE; RECLAMATION OF CONTAMINATED SOIL
    • B09B—DISPOSAL OF SOLID WASTE NOT OTHERWISE PROVIDED FOR
    • B09B3/00—Destroying solid waste or transforming solid waste into something useful or harmless
    • B09B3/40—Destroying solid waste or transforming solid waste into something useful or harmless involving thermal treatment, e.g. evaporation
    • 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
    • C22B15/0028—Smelting or converting
    • C22B15/003—Bath smelting or converting
    • C22B15/0036—Bath smelting or converting in reverberatory furnaces
    • 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
    • C22B15/0028—Smelting or converting
    • C22B15/005—Smelting or converting in a succession of furnaces
    • 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
    • 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
    • C22B7/001—Dry processes
    • 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
    • F27B19/00—Combinations of different kinds of furnaces that are not all covered by any single one of main groups F27B1/00 - F27B17/00
    • F27B19/04—Combinations of different kinds of furnaces that are not all covered by any single one of main groups F27B1/00 - F27B17/00 arranged for associated working
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/18—Charging particulate material using a fluid carrier
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/16—Introducing a fluid jet or current into the charge
    • F27D2003/168—Introducing a fluid jet or current into the charge through a lance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27—FURNACES; KILNS; OVENS; RETORTS
    • F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D3/00—Charging; Discharging; Manipulation of charge
    • F27D3/18—Charging particulate material using a fluid carrier
    • F27D2003/185—Conveying particles in a conduct using a fluid
    • 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 invention provides, for example, waste electronic parts and waste electronic substrates containing valuable metals (Cu, Au, Ag, Pt, Pd, etc.) in a melt stored in a furnace body in a smelting furnace such as a continuous copper making facility.
  • the present invention relates to a method for treating a combustible material in which combustible material (combustible scrap) is charged and melt-processed, a smelting furnace used for the implementation, and a continuous copper making facility.
  • Wastes such as waste electronic parts and waste electronic substrates (combustible scraps, hereinafter referred to as combustibles), for example, copper (Cu), gold (Au), silver (Ag), platinum, as well as combustible plastics
  • Valuable metals such as (Pt) and palladium (Pd) are contained. Therefore, such combustible materials are charged (injected) into a smelting furnace such as a continuous copper making facility, and combustion / melting (in this specification, “combustion / melting” means “combustion and / or melting”). In this case, the valuable metal is recovered together with copper in the subsequent process while being used for heating the melt.
  • Patent Documents 1 and 2 Conventionally, for example, as shown in Patent Documents 1 and 2 below, combustible materials containing valuable metals are dropped onto a molten metal surface from an inlet provided on the ceiling wall or side wall of the furnace body.
  • combustible materials are pressed into a lump and charged into a melt, thereby preventing damage to a waste heat boiler or the like. That is, for example, when the combustible material is dropped into the melt in a finely crushed state such as powder or granule instead of being pressed into a lump, the combustible material is removed from the gas zone (space on the molten metal surface) of the furnace body.
  • the waste heat boiler or the like In addition to being easily discharged together with the exhaust gas, there is a risk of burning the waste heat boiler or the like to damage the waste heat boiler or the like.
  • a lance pipe that opens toward the molten metal surface is provided above the molten metal surface of the furnace body. From the lance pipe, ore (concentrate) containing non-ferrous metal such as copper ore and oxygen-enriched air (air having an oxygen content of about 40 to 70%) are blown into the molten metal surface. Further, in order to maintain the temperature of the melt within a predetermined high temperature range, coke, pulverized coal, and the like (hereinafter collectively referred to as coal) are charged as heat compensation fuel.
  • coal coke, pulverized coal, and the like
  • the conventional combustible material processing method, smelting furnace, and continuous copper making facility have the following problems.
  • the combustible material that has fallen onto the molten metal surface of the furnace main body tends to stay on the molten metal surface as it is, and burns and melts while floating on the molten metal. Therefore, it is not possible to secure a large contact area between the combustible material and the molten material. It was. Accordingly, the processing takes a long time and the processing amount is restricted.
  • combustion heat of the combustible material combusted on the molten metal surface escapes to the gas zone on the molten metal surface and is not sufficiently utilized for heating the melt.
  • this combustion heat may cause the bricks provided on the gas zone inner wall of the furnace body to be exposed to high temperatures and become worn (damaged, deteriorated, depleted, etc.), or the waste heat boiler that receives exhaust gas from the gas zone may overheat. was there.
  • the combustible material since the melt and the combustible material are not sufficiently stirred, the combustible material remains undissolved in the melt and is discharged out of the system along with the slag while containing the valuable metal component, resulting in slag loss of the valuable metal. It was. In particular, conventionally, since the combustible material has been pressed into a lump shape, the combustible material was easily left undissolved. In addition, for example, in continuous copper making facilities, when the molten material (mat and slag) flows through the slag that connects the smelting furnace and the separation furnace downstream of the smelting furnace, the slag is clogged by the undissolved residue of the combustible material. There was a risk that the melt would overflow from the soot.
  • the present invention has been made in view of such circumstances, and the combustible material is sufficiently brought into contact with the melt, and the combustion heat of the combustible material is efficiently used for heating the melt. Reduces unmelted slag loss of valuable metals, increases the amount of combustible material, reduces operating costs, and suppresses damage to the gas zone inner wall of the furnace body and waste heat boiler It aims at providing the processing method of a combustible material, the smelting furnace used for the implementation, and continuous copper making equipment.
  • a pipe that opens toward the molten metal surface is provided above the molten metal surface stored in the furnace body for smelting the non-ferrous metal, from the pipe, A combustible material containing valuable metals and oxygen-enriched air are blown into the molten metal surface.
  • a smelting furnace according to another aspect of the present invention is a smelting furnace used for carrying out the above-described method for treating a combustible material, wherein the molten metal surface is located above the molten metal surface stored in the furnace body. And a combustible material containing valuable metals and oxygen-enriched air can be blown into the molten metal surface of the melt through the pipe.
  • combustible material and oxygen-enriched air are supplied from a pipe on the molten metal surface toward the molten metal surface stored in the furnace body.
  • oxygen-enriched air for example, air having an oxygen content of about 40 to 70%
  • the combustible material can easily penetrate deeply into the melt, and a large contact area with the melt is ensured.
  • the combustible material is quickly heated, burned and melted, and is less likely to remain undissolved, so that the processing efficiency of the combustible material is improved and the processing amount can be increased.
  • the combustible material is blown into the melt together with the oxygen-enriched air, the combustible component contained in the combustible material and oxygen easily react in the melt, and the combustible material is more easily combusted and melted. Further, when the combustible material and the oxygen-enriched air are blown into the melt, an action of stirring the combustible material in the melt is also obtained, and the above-described effects can be obtained more remarkably.
  • the slag loss of valuable metals is reduced because the undissolved residue of the combustible material is prevented from being discharged out of the system together with the slag while containing the valuable metal components.
  • a slag that connects a smelting furnace and a separation furnace on the downstream side thereof is provided, and the melt discharged (overflowed) from the furnace body of the smelting furnace ( Mat and slag) flow into the separation furnace through the dredge.
  • the combustible material and the oxygen-enriched air are blown from the pipe that opens toward the molten metal surface, so that the combustible material does not easily float in the gas zone of the furnace body.
  • a combustible material that is finely crushed for example, powdery or granular.
  • the combustible material is likely to be discharged together with the exhaust gas, which may damage the waste heat boiler or the like. It was.
  • the combustible material is easily infiltrated into the melt by being blown into the molten metal surface. It is suppressed.
  • the combustible material burns and melts more quickly in the melt, and is further less likely to remain undissolved. It will be particularly remarkable.
  • the combustible material can be sufficiently brought into contact with the melt, and the combustion heat of the combustible material can be efficiently used for heating the melt. It is possible to reduce the undissolved residue of the combustible material, suppress the slag loss of valuable metals, and increase the processing amount of the combustible material. Operating costs can be reduced, and damage to the gas zone inner wall of the furnace body and waste heat boiler can be suppressed.
  • a lance pipe that blows ore containing non-ferrous metal and oxygen-enriched air into the molten metal surface may be used as the pipe.
  • the pipe may be a lance pipe configured such that an ore containing a non-ferrous metal and oxygen-enriched air can be blown into the molten metal surface of the melt.
  • the present invention can be implemented using an existing lance pipe provided in a conventional smelting furnace for charging ore (concentrate) into the melt.
  • the furnace body can have a simple structure (that is, it can be maintained without complicating the structure), and the equipment cost can be reduced.
  • a combustible material treatment method uses a continuous copper making facility including a smelting furnace, a separation furnace, and a copper making furnace connected to each other by a firewood.
  • a continuous copper making facility including a smelting furnace, a separation furnace, and a copper making furnace connected to each other by a firewood.
  • To produce a melt containing mat and slag separating the mat and slag produced in the smelting furnace in the separation furnace, and separating in the separation furnace in the copper making furnace.
  • the mat may be oxidized to produce crude copper and slag, and in the smelting furnace, the combustible material and the oxygen-enriched air may be blown into the molten metal surface from the pipe.
  • the continuous copper making facility of another aspect of the present invention includes a smelting furnace that heats and melts copper ore to produce a melt including a mat and slag, and a mat and slag generated in the smelting furnace.
  • a continuous copper making facility comprising the above-described smelting furnace, wherein the smelting furnace described above is used.
  • the method for treating a combustible material according to another aspect of the present invention is a method of charging coal charged in the melt according to the amount of heat contributed to the melt from the combustible material charged in the melt. The amount may be adjusted.
  • the amount of heat contributed to the melt increases (or increases) from the combustible material charged into the melt
  • the amount of coal charged into the melt is reduced accordingly.
  • the amount of heat contributed to the melt from the combustible material decreases (or decreases)
  • the amount of coal charged into the melt is increased accordingly.
  • the combustible material was only dropped onto the molten metal surface. For this reason, combustible materials have not been used effectively for heating the melt to such an extent that the temperature of the melt can be stably maintained or raised. Therefore, even if the charge amount of the combustible material is simply increased, it is difficult to increase the amount of heat contributed from the combustible material to the melt, and it is difficult to decrease the charge amount of coal. Furthermore, in the conventional method, when the amount of combustible material charged into the melt is simply increased, the above-described gas zone inner wall of the furnace body and the waste heat boiler may be damaged.
  • the processing method of the combustible material of the other aspect of the present invention is such that the furnace body is used for copper smelting, and the melt is processed in a post-process to include the valuable metal in crude copper. It may be recovered.
  • the furnace body is used, for example, in a smelting furnace in a continuous copper making facility, and in a copper making furnace in a subsequent process of the smelting furnace, valuable metals in combustible materials can be efficiently recovered together with crude copper. .
  • a mixing region for mixing the combustible material and the oxygen-enriched air may be provided in the pipe.
  • the combustible material and the oxygen-enriched air that are blown into the molten metal surface through the pipe are ejected in a mixed state in the pipe. Accordingly, the combustible material blown into the melt is more easily burned and melted, and the above-described operational effects become more remarkable.
  • the combustible material can be sufficiently brought into contact with the melt, and the combustion heat of the combustible material can be efficiently used for heating the melt. It is possible to reduce the undissolved residue of combustible materials, suppress slag loss of valuable metals, and increase the processing amount of combustible materials. Operation costs can be reduced, and damage to the gas zone inner wall of the furnace body and waste heat boiler can be suppressed.
  • FIG. 3 is a view showing an AA cross section of FIG. 2. It is a figure explaining the structure of a lance pipe (pipe). It is a graph explaining the test result of the Example of this invention. It is a graph explaining the test result of the Example of this invention. It is a graph explaining the test result of the conventional comparative example. It is a graph explaining the test result of the conventional comparative example.
  • a smelting furnace 10 employing a method for treating a combustible material according to an embodiment of the present invention and a continuous copper making facility 1 including the smelting furnace 10 will be described with reference to the drawings.
  • the smelting furnace 10 of this embodiment is represented by the Mitsubishi continuous copper manufacturing method (Mitsubishi MI method) provided with S furnace (smelting furnace), CL furnace (separation furnace), C furnace (copper making furnace), and refinement furnace.
  • S furnace smelting furnace
  • CL furnace separation furnace
  • C furnace copper making furnace
  • refinement furnace refinement furnace.
  • the continuous copper making facility 1 to be used it is used as an S furnace.
  • the continuous copper making facility 1 includes a smelting furnace 10 that heats and melts copper ore (copper concentrate) to produce a melt L including a mat M and a slag S, and the melting furnace 10.
  • a separation furnace 3 that separates the mat M and slag S produced in the smelting furnace 10;
  • a copper making furnace 20 that further oxidizes the mat M separated in the separation furnace 3 to produce crude copper C and slag S;
  • the refining furnace 5 for refining the crude copper C produced in the copper making furnace 20 to produce higher quality copper and valuable metals.
  • the smelting furnace 10 stores a furnace body 12 for smelting non-ferrous metal and an ore containing copper (ore in this embodiment) in the furnace body 12 together with oxygen-enriched air (oxygen gas) and flux. And a plurality of lance pipes (pipes) 15 to be supplied to the melt L.
  • the lance pipe 15 penetrates the ceiling wall 11 of the furnace body 12 in the vertical direction and can be moved up and down with respect to the molten metal surface of the melt L.
  • the lance pipe 15 is disposed above the surface of the molten metal L and opens toward the surface of the molten metal L.
  • the lance pipe 15 is provided so that copper ore and oxygen-enriched air can be blown into the molten metal L surface.
  • the ceiling wall 11 of the smelting furnace 10 is provided with an opening 19 for discharging gas (exhaust gas) generated in the furnace.
  • the waste heat boiler 7 is connected to the downstream side of the opening 19.
  • the separation furnace 3 separates the mat M and the slag S in the melt L fed from the smelting furnace 10 by utilizing the difference in specific gravity between the mat M and the layer of the mat M having a large specific gravity. A layer of slag S having a small specific gravity is formed.
  • a plurality of electrodes 8 are arranged with their lower ends immersed in the slag.
  • the three-phase alternating current is input to the electrodes 8 from the transformer to generate Joule heat, thereby keeping the melt L warm.
  • the copper making furnace 20 includes a plurality of lance pipes 25 for supplying cold material and limestone into the furnace together with oxygen-enriched air such as oxygen gas.
  • the lance pipe 25 is provided through the ceiling wall 21 of the copper making furnace 20 and can be moved up and down. Further, the ceiling wall 21 of the copper making furnace 20 is provided with a discharge port for discharging the gas generated in the furnace.
  • a waste heat boiler 9 is connected to the discharge port.
  • the dried copper concentrate (non-ferrous metal raw material) and flux (eg, sand, lime, etc.) together with oxygen-enriched air and the lance pipe 15 are used for the smelting furnace 10. Blow into the melt L.
  • the copper concentrate is dissolved and oxidized, and the main component is a mat M made of a mixture of copper sulfide and iron sulfide, and slag made of gangue, solvent, iron oxide, etc. in the copper concentrate. S is produced in the melt L.
  • the mat M and the slag S contained in the melt L of the smelting furnace 10 are sent to the separation furnace 3 by the dredger 6A, where they are separated into the lower layer mat M and the upper layer slag S due to the difference in specific gravity.
  • the slag S (Sg) separated in the separation furnace 3 is collected separately from the mat M. Further, the sulfur-containing gas such as SO 2 gas generated in the smelting furnace 10 or the like is transferred to a sulfuric acid factory (not shown) and recovered as sulfuric acid or gypsum (CaSO 4 ).
  • the mat M separated in the separation furnace 3 is sent to the copper making furnace 20 through the basket 6B.
  • a flux is further blown into the mat M together with air using the lance pipe 25.
  • sulfur and iron in the mat M can be oxidized, and crude copper C having a purity of 98.5% or more can be obtained.
  • the crude copper C continuously produced in the copper making furnace 20 is transferred to the refining furnace 5 through the jar 6C.
  • refined copper C is refine
  • the copper-making furnace slag Sa contains copper oxide (10 to 30%) together with iron oxide.
  • the copper-making furnace slag Sa is made into a solid powder by water granulation, dried, then sent to the smelting furnace 10 and melted again together with the raw material ore to recover copper.
  • waste electronic parts made of combustible plastics containing valuable metals (Cu, Au, Ag, Pt, Pd, etc.) Wastes such as waste electronic substrates (combustible scraps, hereinafter referred to as combustible materials) are charged, and the combustible materials are smelted together with copper concentrate to collect valuable metals other than copper together with copper.
  • the furnace main body 12 of the smelting furnace 10 is used for copper smelting, but by treating the melt L sent from the furnace main body 12 to the copper smelting furnace 20 in the subsequent process, crude copper is processed. The valuable metals are recovered by inclusion in C.
  • the copper making furnace 20 is charged with a copper plate used as an anode plate in electrolytic smelting, so-called anode scrap. Since this anode scrap has a high copper quality, by putting it into the copper making furnace 20 located on the downstream side of the continuous copper making equipment 1, the copper content is recovered without going through a complicated process.
  • the smelting furnace 10 includes a bottomed cylindrical furnace body 12.
  • the furnace body 12 is provided with a ceiling wall 11 so as to close the upper portion thereof.
  • a melt L is stored inside the furnace body 12.
  • a plurality of lance pipes 15 are disposed on the ceiling wall 11 so as to penetrate the ceiling wall 11.
  • the lance pipes 15 form a straight line and a plurality of the lance pipes 15 are formed so as to be parallel to each other (see a top view of the furnace body 12 shown in FIG. 3).
  • the lance pipe 15 feeds powdery copper ore (smelting raw material) and auxiliary raw materials (solvent) such as flux into the furnace body 12 together with oxygen-enriched air at high speed and collides with the molten metal surface of the melt L.
  • the oxidation reaction is caused in the melt L.
  • the lance pipe 15 is provided above the molten metal surface of the melt L and opens toward the molten metal surface. The lower end opening of the lance pipe 15 is disposed close to the molten metal surface of the melt L.
  • the lance pipe 15 is capable of blowing a combustible material further containing valuable metals into the molten metal surface of the melt L.
  • the combustible material blown into the melt L from the lance pipe 15 is, for example, a waste electronic substrate or a waste electronic component that has been previously crushed by a crusher to be granular or powdery.
  • the average particle diameter (outer diameter) of the combustible material is, for example, 10 mm or less.
  • coal coal
  • the lance pipe 15 has a double cylinder structure.
  • An outer cylinder 15 a of the lance pipe extends through the ceiling wall 11 of the furnace body 12 toward the molten metal surface of the melt L.
  • the inner cylinder 15b of the lance pipe 15 has a lower end opening located in the outer cylinder 15a.
  • the region between the lower end opening of the inner cylinder 15b and the lower end opening of the outer cylinder 15a in the outer cylinder 15a is each material (copper ore, auxiliary material, combustible, oxygen-enriched air, Coal, etc.).
  • materials other than oxygen-enriched air are preferably mixed in advance before being introduced into the lance pipe 15.
  • combustibles and coal are not limited to this, and the charging amount may be adjusted according to the temperature of the melt L and the gas temperature of the waste heat boiler 7.
  • the material Y such as oxygen-enriched air is supplied to the melt L of the furnace body 12 through the space between the outer cylinder 15 a and the inner cylinder 15 b of the lance pipe 15. Further, through the inner cylinder 15 b of the lance pipe 15, a material X such as copper ore other than the oxygen-enriched air, auxiliary materials, combustibles, and coal is supplied to the melt L. Specifically, various materials X are transported in the inner cylinder 15b of the lance pipe 15, so that these materials X are premixed in the inner cylinder 15b, and are opened from the lower end opening of the inner cylinder 15b. It is sent into the outer cylinder 15a.
  • the inner cylinder 15b of the lance pipe 15 includes the material X other than oxygen-enriched air (specifically, combustible material and at least one of copper ore, auxiliary material, and coal).
  • the conveying tube is capable of mixing the material X).
  • the amount of coal charged in the melt L is adjusted according to the amount of heat contributed to the melt L from the combustible material charged in the melt L. Specifically, when the amount of heat contributed to the melt L is increased (or increased) from the combustible material charged into the melt L, the charging of the coal charged into the melt L according to this is increased. Reduce the amount. When the amount of heat contributed from the combustible material to the melt L decreases (or decreases), the amount of coal charged into the melt L is increased accordingly. By these things, the temperature of the melt L is maintained stably. That is, the heat balance of the melt L is controlled by adjusting the amount of combustible material and the amount of coal charged so that the temperature of the melt L is maintained within a predetermined range.
  • the amount of combustible material charged from each lance pipe 15 into the melt L may be set equally for all lance pipes 15.
  • at least one of the lance pipes 15 may be a lance pipe 15 dedicated to a combustible material for charging the combustible material.
  • the amount of oxygen-enriched air that is blown from the lance pipe 15 may be variously set in the same manner as the amount of combustible material.
  • the charging amount of at least one of combustible material and oxygen-enriched air blown from the lance pipe 15 into the melt L may be controlled according to the temperature of the melt L or the gas temperature of the waste heat boiler 7.
  • the ceiling wall 11 of the furnace body 12 is provided with an opening 19 having a rectangular cross section at a position different from the lance pipe 15 group.
  • a rising flue 22 for discharging exhaust gas is extended from the opening 19 upward in the furnace body 12.
  • melt discharge port (overflow port) 27 is provided on the side wall 24 of the furnace body 12 at a position opposite to the opening 19 with the lance pipe 15 interposed therebetween.
  • the melt outlet 27 is located slightly below the lower end opening of the lance pipe 15. The melt L overflows from the melt outlet 27 and is sent to the separation furnace 3 from the jar 6A.
  • the smelting furnace 10 and the continuous copper making facility 1 the melt L stored in the furnace body 12 is obtained.
  • Combustible material and oxygen-enriched air for example, air having an oxygen content of about 40 to 70%
  • oxygen-enriched air for example, air having an oxygen content of about 40 to 70%
  • the combustible material is blown into the melt L together with the oxygen-enriched air, the combustible component contained in the combustible material and oxygen are likely to react in the melt L, and the combustible material is more easily combusted and melted. . Further, when the combustible material and the oxygen-enriched air are blown into the melt L, an action of stirring the combustible material in the melt L is also obtained, and the above-described effects are obtained more remarkably.
  • the slag loss of the valuable metal is suppressed because the undissolved residue of the combustible material is prevented from being discharged out of the system together with the slag S while containing the valuable metal component.
  • a slag 6A that connects the smelting furnace 10 and the separation furnace 3 on the downstream side thereof is provided, and is discharged from the furnace body 12 of the smelting furnace 10.
  • the molten (overflowed) melt L flows into the separation furnace 3 through the jar 6A.
  • the bricks provided on the inner wall of the gas zone of the furnace body 12 (above the hot water surface in the side wall 24 and the inner wall of the ceiling wall 11) are worn out by the combustion heat of the combustible material combusted on the hot water surface, as in the prior art.
  • the problem that the waste heat boiler 7 is overheated is prevented.
  • the combustible material and the oxygen-enriched air are blown from the lance pipe 15 that opens toward the molten metal surface of the melt L, so that the combustible material does not easily float in the gas zone of the furnace body 12.
  • a combustible material that is finely crushed such as powder or granules, as in this embodiment. That is, conventionally, when a powdery or granular combustible material is simply dropped on the molten metal surface of the melt L, the combustible material is easily discharged together with the exhaust gas, which may damage the waste heat boiler 7 or the like. was there.
  • the combustible material is easily infiltrated into the melt L by being blown into the molten metal surface of the melt L, the above-described problems are caused even if a powdery or granular combustible material is used. Is suppressed.
  • the combustible material burns and melts more quickly in the melt L, and is further less likely to remain melted. It will be a thing.
  • the present invention is not limited to this.
  • the combustible material may be a block shape, a block shape, a plate shape, or the like.
  • the combustible material can be sufficiently brought into contact with the melt L, and the combustion heat of the combustible material can be efficiently used for heating the melt L.
  • the operation cost can be reduced, and damage to the gas zone inner wall of the furnace body 12 and the waste heat boiler 7 can be suppressed.
  • molten_metal surface of the melt L is used as a pipe which blows a combustible material and oxygen-enriched air into the hot_water
  • the charging amount of the coal charged into the molten metal L is adjusted. Accordingly, the amount of coal used can be reliably reduced to reduce operating costs, and the temperature of the melt L is stably maintained within a predetermined range, so that the processing in the melt L is stabilized. That is, when the amount of heat contributed to the melt L is increased (or increased) from the combustible material charged in the melt L, the amount of coal charged in the melt L is reduced accordingly.
  • the amount of heat contributed from the combustible material to the melt L decreases (or decreases)
  • the amount of coal charged into the melt L is increased accordingly.
  • the furnace main body 12 is used for the smelting furnace 10 in the continuous copper making facility 1, and in the copper making furnace 20 in the subsequent process of the smelting furnace 10, the valuable metal in the combustible material is crude copper. It can be efficiently recovered together with C.
  • region which mixes a combustible material and oxygen-enriched air is provided in the lance pipe 15 of the smelting furnace 10. Therefore, the combustible material and oxygen-enriched air blown into the molten metal surface of the melt L through the lance pipe 15 are jetted out in a state of being mixed in the lance pipe 15. Therefore, the combustible material blown into the melt L is more easily burned and melted, and the above-described operational effects become more remarkable.
  • the material X containing the material X other than oxygen-enriched air conveyed toward the melt L in the inner cylinder 15b of the lance pipe 15 (a combustible material and at least one of copper ore, auxiliary material, and coal). ) Is sufficiently mixed in the inner cylinder 15b before being blown into the molten metal surface of the melt L. Therefore, these materials X are easily processed in the melt L quickly and stably.
  • the lance pipe 15 that blows ore and oxygen-enriched air into the melt surface of the melt L is used as a pipe that blows combustible material and oxygen-enriched air into the melt surface of the melt L.
  • the present invention is not limited to this. That is, instead of using the lance pipe 15, a dedicated pipe for blowing combustibles and oxygen-enriched air may be provided. In this case, the pipe is provided above the surface of the molten metal L stored in the furnace body 12 so as to open toward the surface of the molten metal.
  • a dedicated pipe for blowing inflammables and oxygen-enriched air may be provided together with the lance pipe 15. That is, the ore and oxygen-enriched air may be blown from the lance pipe 15 onto the molten metal surface of the melt L, and the combustible material and oxygen-enriched air may be blown into the molten metal L surface from the dedicated pipe.
  • a plurality of lance pipes 15 form a linear row and a plurality of rows are arranged in a top view of the furnace body 12 shown in FIG.
  • the arrangement and number are not limited to this case. That is, the lance pipe 15 has, for example, a circular shape (single circular shape, multiple concentric circular shape), a polygonal shape (single polygonal shape, multiple concentric polygonal shape), a matrix shape (lattice shape), a dot shape ( (Regular arrangement, irregular arrangement) or the like.
  • the lance pipe 15 described in the above embodiment has a double cylinder structure, but is not limited to this.
  • a single cylinder structure, a triple or more cylinder structure, and the like. May be.
  • the mixing area may not be provided in the lance pipe 15.
  • the lower end opening of the outer cylinder 15a and the lower end opening of the inner cylinder 15b in the lance pipe 15 may be at the same position (the positions along the vertical direction are the same).
  • the continuous copper making facility 1 only needs to include at least the smelting furnace 10, the separation furnace 3, and the copper making furnace 20, and other refining furnaces 5 and the like are appropriately replaced with other processing apparatuses or omitted. You can do it.
  • scrap (combustible material) containing valuable metals is pulverized, and the lance pipe 15 is placed on the surface of the melt L in the S furnace (smelting furnace 10) of the Mitsubishi continuous copper method.
  • the operation of charging with oxygen-enriched air was carried out.
  • the scrap is mainly composed of substrate scraps, and includes a combustible resin material as a main component, Cu, SiO 2 , CaO, Al 2 O 3 and trace amounts of Au and Ag.
  • the scrap was crushed by a crusher so that the particle size was 10 mm or less.
  • the crushed scrap was mixed with copper ore, dried using a rotary dryer, and then charged into the furnace from 10 lance pipes 15 installed on the ceiling wall 11 of the S furnace.
  • the amounts of ore and scrap charged were 101 ton for ore (hereinafter, “ton” is simply expressed as “t”) and 6.4 ton for scrap.
  • t 101 ton for ore
  • t 6.4 ton for scrap.
  • about 300 kg / hr of pulverized coal is added for the purpose of supplementing the heat source that the melt L is insufficient. The temperature of the melt L was maintained. After the start of the test, the addition of pulverized coal was stopped.
  • the melt L in the S furnace flows out from the melt outlet 27 of the furnace body 12 and is sent to the CL furnace (separation furnace 3) through the firewood 6A. And the melt L is isolate
  • the valuable metal contained in the slag Sg is not recovered and becomes a slag loss of the valuable metal.
  • concentration of the valuable metal in slag Sg changes according to the process in S furnace. Then, the value before and after the start of a test was measured about the copper concentration (%) in slag Sg in order to confirm the processing condition in S furnace.
  • the copper concentration in the slag was measured using a fluorescent X-ray analyzer. The results are shown in FIG.
  • the values before and after the start of the test were measured for the temperature of the melt L (° C.) and the gas temperature of the waste heat boiler 7 (° C.). Specifically, for example, when the scrap does not sufficiently burn in the melt L or burns in the gas zone of the furnace body 12, the temperature of the melt L decreases or the waste heat boiler 7 The occurrence of problems such as an increase in gas temperature is expected.
  • the temperature was measured using a K-type thermocouple and an N-type thermocouple. The results are shown in FIG.
  • the temperature (° C.) of the melt L after the start of the test (the right region of 0 (hr) shown on the horizontal axis of FIG. 6) is the value before the start of the test (of FIG. 6).
  • the temperature was about the same as the temperature (° C.) of the melt L in the left region of 0 (hr) shown on the horizontal axis of the graph. That is, it was confirmed that the amount of heat of pulverized coal can be compensated by blowing scrap into the melt L according to this example.
  • the gas temperature (° C.) of the waste heat boiler 7 was about the same before and after the start of the test. Thus, in this example, it was confirmed that even when crushed scrap was used, the scrap penetrated deeply into the melt L and was treated well.
  • the combustible material can be sufficiently brought into contact with the melt, and the combustion heat of the combustible material can be efficiently used for heating the melt. It is possible to reduce the undissolved residue of combustible materials, suppress slag loss of valuable metals, and increase the processing amount of combustible materials. Operation costs can be reduced, and damage to the gas zone inner wall of the furnace body and waste heat boiler can be suppressed. Therefore, it can be used industrially.

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PCT/JP2013/077677 2013-06-21 2013-10-10 可燃物の処理方法と設備 WO2014203413A1 (ja)

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CA2876819A CA2876819C (en) 2013-06-21 2013-10-10 Method for treating combustible material and installation
US14/414,789 US9745643B2 (en) 2013-06-21 2013-10-10 Method for treating combustible material and installation
IN11086DEN2014 IN2014DN11086A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 2013-06-21 2013-10-10
KR1020157001569A KR101639959B1 (ko) 2013-06-21 2013-10-10 가연물의 처리 방법과 설비
MX2014015452A MX353324B (es) 2013-06-21 2013-10-10 Método para tratar material combustible e instalación.

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MX353324B (es) 2018-01-08
PE20150378A1 (es) 2015-03-19
KR20150021583A (ko) 2015-03-02
MX2014015452A (es) 2015-07-23
US20150176102A1 (en) 2015-06-25
US9745643B2 (en) 2017-08-29
IN2014DN11086A (GUID-C5D7CC26-194C-43D0-91A1-9AE8C70A9BFF.html) 2015-09-25
JP5761258B2 (ja) 2015-08-12
CA2876819C (en) 2016-12-06
CA2876819A1 (en) 2014-12-24
KR101639959B1 (ko) 2016-07-14

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