WO2015016086A1 - 電気炉製鋼ダストからの亜鉛回収方法および電気炉製鋼ダストからの亜鉛回収装置 - Google Patents
電気炉製鋼ダストからの亜鉛回収方法および電気炉製鋼ダストからの亜鉛回収装置 Download PDFInfo
- Publication number
- WO2015016086A1 WO2015016086A1 PCT/JP2014/069184 JP2014069184W WO2015016086A1 WO 2015016086 A1 WO2015016086 A1 WO 2015016086A1 JP 2014069184 W JP2014069184 W JP 2014069184W WO 2015016086 A1 WO2015016086 A1 WO 2015016086A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- zinc
- electric furnace
- zno
- steelmaking dust
- furnace steelmaking
- Prior art date
Links
- 239000011701 zinc Substances 0.000 title claims abstract description 186
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 185
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 185
- 239000000428 dust Substances 0.000 title claims abstract description 128
- 238000009628 steelmaking Methods 0.000 title claims abstract description 99
- 238000000034 method Methods 0.000 title claims abstract description 48
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 153
- 238000010438 heat treatment Methods 0.000 claims abstract description 71
- 238000002156 mixing Methods 0.000 claims abstract description 54
- 239000011575 calcium Substances 0.000 claims abstract description 48
- 229940043430 calcium compound Drugs 0.000 claims abstract description 24
- 150000001674 calcium compounds Chemical class 0.000 claims abstract description 24
- 230000004907 flux Effects 0.000 claims abstract description 18
- BUKHSQBUKZIMLB-UHFFFAOYSA-L potassium;sodium;dichloride Chemical compound [Na+].[Cl-].[Cl-].[K+] BUKHSQBUKZIMLB-UHFFFAOYSA-L 0.000 claims abstract description 10
- 239000007787 solid Substances 0.000 claims abstract description 6
- 239000007864 aqueous solution Substances 0.000 claims description 48
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 40
- 238000002386 leaching Methods 0.000 claims description 27
- 239000000243 solution Substances 0.000 claims description 18
- ODINCKMPIJJUCX-UHFFFAOYSA-N Calcium oxide Chemical compound [Ca]=O ODINCKMPIJJUCX-UHFFFAOYSA-N 0.000 claims description 13
- 238000011084 recovery Methods 0.000 claims description 13
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 claims description 10
- 238000002844 melting Methods 0.000 claims description 10
- 230000008018 melting Effects 0.000 claims description 10
- 230000007935 neutral effect Effects 0.000 claims description 8
- 239000000292 calcium oxide Substances 0.000 claims description 7
- 235000012255 calcium oxide Nutrition 0.000 claims description 7
- 229910000831 Steel Inorganic materials 0.000 claims description 6
- 239000010959 steel Substances 0.000 claims description 6
- 235000019738 Limestone Nutrition 0.000 claims description 5
- AXCZMVOFGPJBDE-UHFFFAOYSA-L calcium dihydroxide Chemical compound [OH-].[OH-].[Ca+2] AXCZMVOFGPJBDE-UHFFFAOYSA-L 0.000 claims description 5
- 239000000920 calcium hydroxide Substances 0.000 claims description 5
- 235000011116 calcium hydroxide Nutrition 0.000 claims description 5
- 229910001861 calcium hydroxide Inorganic materials 0.000 claims description 5
- 238000005363 electrowinning Methods 0.000 claims description 5
- 239000006028 limestone Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 abstract description 16
- 239000002184 metal Substances 0.000 abstract description 16
- 239000000203 mixture Substances 0.000 abstract description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 abstract 2
- 239000011369 resultant mixture Substances 0.000 abstract 1
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 114
- 239000011787 zinc oxide Substances 0.000 description 57
- 229910052742 iron Inorganic materials 0.000 description 26
- 239000000460 chlorine Substances 0.000 description 16
- 239000011133 lead Substances 0.000 description 16
- 238000012360 testing method Methods 0.000 description 13
- 229910052793 cadmium Inorganic materials 0.000 description 11
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 11
- 230000006837 decompression Effects 0.000 description 11
- 229910052736 halogen Inorganic materials 0.000 description 11
- 239000000843 powder Substances 0.000 description 11
- 235000008733 Citrus aurantifolia Nutrition 0.000 description 10
- 235000011941 Tilia x europaea Nutrition 0.000 description 10
- 150000002367 halogens Chemical class 0.000 description 10
- 239000004571 lime Substances 0.000 description 10
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 8
- 238000001816 cooling Methods 0.000 description 8
- 229910001385 heavy metal Inorganic materials 0.000 description 8
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 7
- 229910052801 chlorine Inorganic materials 0.000 description 7
- 229910052731 fluorine Inorganic materials 0.000 description 7
- 239000011737 fluorine Substances 0.000 description 7
- YCKRFDGAMUMZLT-UHFFFAOYSA-N Fluorine atom Chemical compound [F] YCKRFDGAMUMZLT-UHFFFAOYSA-N 0.000 description 6
- 239000003795 chemical substances by application Substances 0.000 description 6
- 238000012545 processing Methods 0.000 description 6
- 238000009413 insulation Methods 0.000 description 5
- 238000002441 X-ray diffraction Methods 0.000 description 4
- 238000004090 dissolution Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- -1 ZnFe 2 O 4 Chemical compound 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 3
- WETINTNJFLGREW-UHFFFAOYSA-N calcium;iron;tetrahydrate Chemical compound O.O.O.O.[Ca].[Fe].[Fe] WETINTNJFLGREW-UHFFFAOYSA-N 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000002244 precipitate Substances 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000003723 Smelting Methods 0.000 description 2
- 229910001308 Zinc ferrite Inorganic materials 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- BRPQOXSCLDDYGP-UHFFFAOYSA-N calcium oxide Chemical compound [O-2].[Ca+2] BRPQOXSCLDDYGP-UHFFFAOYSA-N 0.000 description 2
- 238000007922 dissolution test Methods 0.000 description 2
- 238000002474 experimental method Methods 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- WGEATSXPYVGFCC-UHFFFAOYSA-N zinc ferrite Chemical compound O=[Zn].O=[Fe]O[Fe]=O WGEATSXPYVGFCC-UHFFFAOYSA-N 0.000 description 2
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- 229910000975 Carbon steel Inorganic materials 0.000 description 1
- 229910001341 Crude steel Inorganic materials 0.000 description 1
- 229910001335 Galvanized steel Inorganic materials 0.000 description 1
- 229910000978 Pb alloy Inorganic materials 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 229910052791 calcium Inorganic materials 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 239000003575 carbonaceous material Substances 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
- 230000005494 condensation Effects 0.000 description 1
- 238000005520 cutting process Methods 0.000 description 1
- 235000013365 dairy product Nutrition 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000779 depleting effect Effects 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 239000008397 galvanized steel Substances 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 150000002505 iron Chemical class 0.000 description 1
- WPBNNNQJVZRUHP-UHFFFAOYSA-L manganese(2+);methyl n-[[2-(methoxycarbonylcarbamothioylamino)phenyl]carbamothioyl]carbamate;n-[2-(sulfidocarbothioylamino)ethyl]carbamodithioate Chemical compound [Mn+2].[S-]C(=S)NCCNC([S-])=S.COC(=O)NC(=S)NC1=CC=CC=C1NC(=S)NC(=O)OC WPBNNNQJVZRUHP-UHFFFAOYSA-L 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- JBQYATWDVHIOAR-UHFFFAOYSA-N tellanylidenegermanium Chemical compound [Te]=[Ge] JBQYATWDVHIOAR-UHFFFAOYSA-N 0.000 description 1
- 230000036962 time dependent Effects 0.000 description 1
- 239000003039 volatile agent Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Images
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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/30—Obtaining zinc or zinc oxide from metallic residues or scraps
-
- 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
-
- 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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/005—Preliminary treatment of scrap
-
- 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
- C22B19/02—Preliminary treatment of ores; Preliminary refining of zinc oxide
-
- 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
- C22B19/32—Refining zinc
-
- 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
- C22B7/02—Working-up flue dust
-
- 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
- C22B9/00—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals
- C22B9/10—General processes of refining or remelting of metals; Apparatus for electroslag or arc remelting of metals with refining or fluxing agents; Use of materials therefor, e.g. slagging or scorifying agents
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C1/00—Electrolytic production, recovery or refining of metals by electrolysis of solutions
- C25C1/16—Electrolytic production, recovery or refining of metals by electrolysis of solutions of zinc, cadmium or mercury
-
- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25C—PROCESSES FOR THE ELECTROLYTIC PRODUCTION, RECOVERY OR REFINING OF METALS; APPARATUS THEREFOR
- C25C7/00—Constructional parts, or assemblies thereof, of cells; Servicing or operating of cells
-
- 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 relates to a method for recovering zinc from electric furnace steelmaking dust and a device for recovering zinc from electric furnace steelmaking dust.
- Dust mainly consists of oxides of iron and zinc, such as ZnFe 2 O 4 , ZnO, etc., and how efficiently it separates ZnO and Fe 2 O 3 into zinc and iron which are depleting rare resources. Whether it can be recovered is important.
- the mainstream method adopted as an electric furnace dust treatment both at home and abroad is the Waelz method (see, for example, Patent Document 1).
- a rotary kiln is used, carbonaceous material is added to electric furnace dust, heated to about 1300 ° C. with a heavy oil burner to reduce zinc oxide, and once volatilized as zinc vapor.
- the generated zinc vapor is reoxidized by CO 2 in the atmosphere, zinc is finally recovered in the form of crude zinc oxide and supplied to a zinc smelting manufacturer.
- the residue after the zinc content is extracted is discharged outside the furnace, and some of it is recycled as raw materials for electric furnaces as clinker, but most of the others are processed as roadbed materials, cement raw materials, or landfill materials. . Recently, there are many cases where they are stored in electric furnace steel manufacturers and Waelz kiln operators.
- the Waelz method uses a large amount of energy to reduce zinc in the oxide form from its original form to a metal state, but finally returns to the oxide form.
- the zinc oxide in the dust is simply separated and concentrated, which is extremely inefficient in terms of effective use of energy.
- the iron component recovered by the Waelz method is also low-purity iron oxide, and the recycle rate of iron is extremely low. Highly effective use based on a new idea that does not depend on this method has been desired.
- the present inventors added calcium oxide more than twice the number of moles of iron in the dust to the dust, and in the air at 900 ° C. or more and 1000 ° C. or less for 60 hours.
- the zinc ferrite ZnFe 2 O 4 which is the main component of zinc in dust is changed into zinc oxide ZnO and dicalcium ferrite 2CaO ⁇ Fe 2 O 3 as shown in the formula (1).
- a method of magnetically separating the generated ZnO and 2CaO ⁇ Fe 2 O 3 by using a magnetic field gradient by utilizing the difference in magnetic properties between the two has been proposed (for example, see Patent Document 2). .
- the present invention has been made paying attention to such problems, and can recover high-purity metallic zinc in a relatively short time, from a method for recovering zinc from electric furnace steelmaking dust and from electric furnace steelmaking dust.
- An object is to provide a zinc recovery device.
- the inventors of the present invention conducted an experiment in which lime was added to steelmaking dust in an electric furnace and heat-treated in a non-reducing atmosphere. Regardless of whether CaO was added or not, the volatilization amount of iron and zinc was small, but chlorine, Most heavy metals with high vapor pressure, such as fluorine halogens, lead, and cadmium, are volatilized and removed. The concentration of halogen, lead, and cadmium after heat treatment at 1100 ° C is below the analytical limit. As a result, the present invention has been achieved.
- the method for recovering zinc from electric furnace steelmaking dust comprises mixing electric furnace steelmaking dust and a calcium compound containing Ca in a molar number equal to or greater than the number of moles of Fe in the electric furnace steelmaking dust.
- a Ca mixed heating step [see formula (2)] to obtain ZnO and 2CaO ⁇ Fe 2 O 3 by heat treatment at 960 ° C. or higher and 1100 ° C. or lower for 1 to 3 hours in a non-reducing atmosphere;
- the iron powder mixing step in which the ZnO and 2CaO ⁇ Fe 2 O 3 obtained in the heating step are mixed with iron powder having a molar number equal to or greater than the number of moles of the ZnO and pressed, and the iron powder mixing step.
- a green compact is placed inside a vacuum container, and the inside of the vacuum container is decompressed and heated to generate zinc vapor [see formula (3)], and the zinc vapor is cooled and solidified to form a solid zinc piece.
- Reduction volatilization step to be obtained and the reduction volatilization A zinc obtaining step of dissolving the zinc pieces obtained in the step in a NaCl-KCl-based multi-component chloride-based flux having a melting point lower than that of zinc and then cooling to obtain massive zinc. It is characterized by that.
- the apparatus for recovering zinc from electric furnace steelmaking dust comprises mixing an electric furnace steelmaking dust and a calcium compound containing Ca having a molar number of Fe equal to or greater than the number of moles of Fe in the electric furnace steelmaking dust.
- a Ca mixed heating means [see formula (2)] provided so that ZnO and 2CaO.Fe 2 O 3 can be obtained by heat treatment at 960 ° C. or higher and 1100 ° C. or lower for 1 to 3 hours in a reducing atmosphere;
- Iron powder mixing means provided to mix and compact the iron powder of the number of moles of ZnO and the number of moles equal to or greater than the number of moles of ZnO to ZnO and 2CaO.Fe 2 O 3 obtained by the Ca mixing and heating means.
- a method for recovering zinc from electric furnace steelmaking dust and an apparatus for recovering zinc from electric furnace steelmaking dust according to the present invention include an electric furnace steelmaking dust, and a number of moles of Ca equal to or greater than the number of moles of Fe in the electric furnace steelmaking dust.
- Chlorine contained in electric furnace steelmaking dust with almost no volatilization of iron and zinc by mixing it with a calcium compound containing iron and heat-treating at 960 ° C. or higher and 1100 ° C. or lower for 1 to 3 hours in a non-reducing atmosphere
- halogens such as fluorine, heavy metals with high vapor pressure such as lead and cadmium can be almost volatilized and removed.
- zinc vapor is obtained according to the formula (3), and the zinc vapor is cooled and solidified to obtain a zinc piece of metal. Can be recovered. Since the heat treatment is performed by adding a calcium compound before the reduction, a zinc piece free from heavy metals such as halogens and lead can be obtained.
- iron powder to mix for example, electrolytic iron powder or Dalai powder (a kind of iron scrap, cutting scrap of carbon steel) can be used.
- steam should just be more than the boiling point of zinc in the pressure when pressure-reducing.
- the collected metal zinc pieces are dissolved in NaCl-KCl-based multi-component chloride flux and the flux treatment is performed to remove the oxide layer on the surface of the zinc pieces.
- Zinc can be recovered. Further, the residual 2CaO ⁇ Fe 2 O 3 after zinc reduction can be recovered as it is and used as a dephosphorizing agent in the steel making process or an iron source in the blast furnace method.
- the zinc recovery method from the electric furnace steelmaking dust and the zinc recovery device from the electric furnace steelmaking dust according to the present invention efficiently separate zinc oxide in the electric furnace steelmaking dust as an oxide without reducing it.
- metallic zinc can be recovered.
- iron oxide in the electric furnace steelmaking dust can be recovered as a dephosphorizing agent in the steelmaking process or as 2CaO ⁇ Fe 2 O 3 which is the iron source in the blast furnace method, and the electric furnace steelmaking dust is almost completely recycled. Can do.
- the processing cost and input energy of electric furnace steelmaking dust can be significantly reduced.
- the method for recovering zinc from electric furnace steelmaking dust comprises mixing electric furnace steelmaking dust and a calcium compound containing Ca in a molar number equal to or greater than the number of moles of Fe in the electric furnace steelmaking dust.
- 2CaO.Fe 2 O 3 are immersed in an alkaline or neutral aqueous solution to selectively leach ZnO into the aqueous solution, and the aqueous solution from which ZnO has been leached in the leaching step is electrolyzed. And an electrowinning step of depositing zinc on the cathode.
- the apparatus for recovering zinc from electric furnace steelmaking dust comprises mixing an electric furnace steelmaking dust and a calcium compound containing Ca having a molar number of Fe equal to or greater than the number of moles of Fe in the electric furnace steelmaking dust. Obtained by a Ca mixed heating means provided so that ZnO and 2CaO.Fe 2 O 3 can be obtained by heat treatment in a reducing atmosphere at 960 ° C. or higher and 1100 ° C. or lower for 1 to 3 hours. ZnO and 2CaO.Fe 2 O 3 obtained are immersed in an alkaline or neutral aqueous solution, and leaching means is provided so that ZnO is selectively leached into the aqueous solution, and ZnO is formed by the leaching means. Electrolytic extraction means provided so that zinc can be deposited on the cathode by electrolyzing the leached aqueous solution may be included.
- 2CaO ⁇ Fe 2 O 3 is almost dissolved in the aqueous solution by immersing ZnO and 2CaO ⁇ Fe 2 O 3 obtained by the heat treatment with the addition of the calcium compound in an alkaline or neutral aqueous solution. And ZnO can be selectively leached into the aqueous solution. For this reason, 2CaO ⁇ Fe 2 O 3 can be recovered as a residue, and can be used as a dephosphorizing agent in a steelmaking process or an iron source in a blast furnace method. Moreover, by electrolyzing the aqueous solution in which ZnO is leached, zinc can be deposited on the cathode, and high-purity metallic zinc can be recovered.
- the leaching step ZnO obtained in the Ca mixing heating step and 2CaO ⁇ Fe 2 O 3 are converted into the aqueous solution at 70 ° C. or more and 100 ° C. or less. It is preferable to immerse.
- the aqueous solution in the leaching step is preferably an aqueous NaOH solution or an aqueous NH 4 Cl solution.
- the leaching means comprises ZnO and 2CaO.Fe 2 O 3 obtained by the Ca mixing and heating means in the aqueous solution at 70 ° C. or higher and 100 ° C. or lower.
- the aqueous solution of the leaching means is preferably an aqueous NaOH solution or an aqueous NH 4 Cl solution. In these cases, all zinc can be efficiently leached into the aqueous solution.
- FIG. 1 It is a block block diagram which shows the zinc collection
- the amount of zinc, calcium, and iron dissolved when the one heated by adding CaO to electric furnace steelmaking dust is immersed in an aqueous NaOH solution. It is a graph which shows a time-dependent change.
- the apparatus for recovering zinc from electric furnace steelmaking dust according to the embodiment of the present invention includes a Ca mixing heating unit 11, an iron powder mixing unit 12, a reduction volatilization unit 13, and a zinc acquisition unit 14. ing.
- the Ca mixing and heating means 11 includes a mixing container and a heating device.
- the Ca mixing heating means 11 is a mixture of an electric furnace steelmaking dust and a calcium compound containing Ca having a molar number of Fe equal to or greater than the number of moles of Fe in the electric furnace steelmaking dust.
- the heat treatment is performed at 960 ° C. or higher and 1100 ° C. or lower for 1 to 3 hours in a non-reducing atmosphere.
- the Ca mixing heating means 11 can acquire ZnO and 2CaO.Fe 2 O 3 by the reaction of the formula (2).
- the calcium compound to be mixed for example, quick lime (CaO), limestone (CaCO 3), which is slaked lime (Ca (OH) 2).
- the iron powder mixing means 12 has a compacting device.
- the iron powder mixing means 12 is a mixture of ZnO and 2CaO.Fe 2 O 3 obtained by the Ca mixing and heating means 11 with an iron powder having a mole number equal to or greater than the number of moles of ZnO. It is configured to compact the mixture.
- the iron powder to be mixed is, for example, electrolytic iron powder or dairy powder.
- the reduction and volatilization means 13 includes a heat-resistant decompression container 21, a sample holding container 22 provided at one end of the decompression container 21, and a heat insulating tube 23 provided at an intermediate portion of the decompression container 21.
- the low-temperature condensing pipe 24 is provided so as to extend from the other end of the decompression container 21 to the vicinity of the heat insulation pipe 23, and the exhaust pipe 25 is provided at the other end of the decompression container 21.
- the reduction volatilization means 13 is divided into a heating zone (Heating Zone) on one end side from the heat insulation pipe 23 and a cooling zone (Cooling Zone) on the other end side from the heat insulation pipe 23.
- the reduction volatilization means 13 arranges the green compact 1 produced by the iron powder mixing means 12 inside the sample holding container 22 in the heating zone, draws air out of the exhaust pipe 25 and depressurizes the inside of the decompression container 21, By heating the inside of the holding container 22 to 1000 ° C. or more, zinc vapor 2 is generated according to the equation (3), and the zinc vapor 2 is introduced into the cooling zone through the inside of the heat insulation pipe 23, and the surface of the low-temperature condensation pipe 24
- the solid metal zinc pieces 3 can be obtained by cooling and solidifying.
- the zinc acquisition means 14 has a dissolution container.
- the zinc obtaining means 14 puts a NaCl-KCl based multi-component chloride flux having a melting point lower than that of zinc into the dissolution vessel, and the zinc piece obtained by the reduction volatilization means 13 is converted into the multi-component chloride in the dissolution vessel. After being dissolved in the physical flux, it is cooled so that massive zinc can be obtained.
- the method for recovering zinc from the electric furnace steelmaking dust according to the embodiment of the present invention is preferably implemented by the apparatus for recovering zinc from the electric furnace steelmaking dust according to the embodiment of the present invention.
- the method for recovering zinc from electric furnace steelmaking dust according to the embodiment of the present invention first, by Ca mixing heating means 11, the electric furnace steelmaking dust and the number of moles equal to or more than the number of moles of Fe in the electric furnace steelmaking dust. After mixing with the calcium compound containing Ca, heat treatment is performed at 960 ° C. to 1100 ° C. for 1 to 3 hours in a non-reducing atmosphere.
- the volatilization amount of iron and zinc is small, but most of heavy metals with high vapor pressure such as chlorine, halogens of fluorine, lead and cadmium are mostly It was confirmed that it was volatilized and removed.
- the heating temperature was 960 ° C. or higher, the volatilization removal rate was large, and at 1100 ° C., it was confirmed that the halogen, lead, and cadmium concentrations after heat treatment were below the analysis limit.
- these removal rates were 80% or more.
- the heating temperature is higher than 1100 ° C.
- the effect is not different from that at 1100 ° C., and therefore the heating temperature of 1100 ° C. is sufficient at the maximum.
- the heating time is longer than 3 hours, the effect is not changed from the case of 3 hours, so that the heating time is 3 hours at the longest.
- the X-ray diffraction pattern of the dust after the heat treatment was examined, and the result is shown in FIG.
- FIG. 4B it is confirmed that by adding CaO to the dust, the diffraction intensity of ZnFe 2 O 4 in the dust decreases and the diffraction intensity of ZnO increases as the processing temperature increases. It was done.
- FIG. 4 (a) in the case of CaO-free dust, the diffraction intensity of ZnFe 2 O 4 increases as the processing temperature increases. At 960 ° C., the presence ratio of ZnO is remarkably high. It was confirmed that it was getting smaller.
- the iron powder mixing means 12 mixes ZnO obtained by the Ca mixing heating means 11 and 2CaO ⁇ Fe 2 O 3 with iron powder having a mole number equal to or greater than the number of moles of ZnO and compacted. .
- the green compact 1 is placed inside the decompression vessel 21, and the inside of the decompression vessel 21 is decompressed by the reduction volatilization means 13 and heated to 1000 ° C. or more to generate zinc vapor 2, and the zinc vapor 2 is cooled. It solidifies to obtain a solid metal zinc piece 3.
- the metal zinc piece 3 is flaky or granular.
- FIG. 5 shows an X-ray diffraction pattern of zinc pieces collected from the surface of the low-temperature condenser tube 24.
- the dust is directly iron reduced and volatilized without lime treatment, halogen and other volatiles in the dust are evaporated together with zinc and deposited together with zinc. Many peaks of the product and complex acid chloride were observed. The precipitate contained several percent of heavy metals such as lead, cadmium and manganese, and the purity of zinc was 71%.
- the precipitate recovered from the lime-treated dust no compound peak other than metallic zinc was observed, and no mixing of other metals was observed.
- the quality of zinc remained at about 95%, but no mixing of lead or other heavy metals was observed.
- this iron reduction volatilization method can recover metallic zinc in which heavy metals such as halogens and lead are not mixed by combining with the lime treatment method.
- the residual 2CaO ⁇ Fe 2 O 3 after zinc reduction can be recovered as it is and used as a dephosphorizing agent in the steel making process or an iron source in the blast furnace method.
- the cause of the deterioration of the quality of the metal zinc pieces recovered by the reduction volatilization means 13 is an oxide layer on the surface of the precipitate, and the oxide (zinc oxide) is the only and the largest impurity. Therefore, in order to remove the oxide layer on the surface of the zinc piece, the zinc piece obtained by the reduction and volatilization means 13 is converted into a NaCl-KCl-based multiple element having a melting point lower than that of zinc by the zinc obtaining means 14. Dissolve in a chloride flux. Thereafter, by cooling the flux, massive zinc can be obtained.
- the collected metal zinc pieces are dissolved in NaCl-KCl based multi-component chloride flux and the flux treatment is carried out, so that the oxide layer on the surface of the zinc pieces can be removed. High purity zinc metal can be recovered.
- the zinc recovery method from the electric furnace steelmaking dust and the zinc recovery device from the electric furnace steelmaking dust according to the embodiment of the present invention are efficient as oxides without reducing zinc oxide in the electric furnace steelmaking dust.
- the metal zinc can be recovered.
- iron oxide in the electric furnace steelmaking dust can be recovered as a dephosphorizing agent in the steelmaking process or as 2CaO ⁇ Fe 2 O 3 which is an iron source in the blast furnace method, and the electric furnace steelmaking dust is almost completely recycled. be able to.
- the processing cost and input energy of electric furnace steelmaking dust can be significantly reduced.
- recovery apparatus from the electric furnace steelmaking dust of embodiment of this invention is replaced with the leaching means 31 instead of the iron powder mixing means 12, the reduction volatilization means 13, and the zinc acquisition means 14.
- Electrolytic collection means 32 may be included.
- the brewing means 31 has a brewing container.
- the leaching means 31 put NaOH aqueous solution or NH 4 Cl aqueous solution in the leaching vessel and keeps it at 70 ° C. or more and 100 ° C. or less, and in this aqueous solution, ZnO obtained by the Ca mixing heating means 11 and 2CaO ⁇ Fe 2 O 3 And soaked. Thereby, the leaching means 31 selectively leaches ZnO into the aqueous solution.
- the electrowinning means 32 has a lead alloy anode, an aluminum cathode, and a power source for applying a DC voltage between the anode and the cathode.
- the electrowinning means 32 arranges an anode and a cathode in the aqueous solution in which ZnO has been leached by the leaching means 31 and applies a DC voltage between the anode and the cathode by a power source to electrolyze the aqueous solution, Zinc can be deposited.
- the zinc ferrite in the electric furnace steelmaking dust is converted into zinc oxide that can be easily dissolved in both acid and alkali by the Ca mixing heating means 11. Because it is converted, it is possible to leach all the zinc in the dust into the solution.
- 2CaO ⁇ Fe 2 O 3 which is a residue after zinc recovery, as an iron-making raw material or a dephosphorization flux, it is not preferable to dissolve 2CaO ⁇ Fe 2 O 3 together with zinc in the solution.
- [ZnO leaching test] 1 g of electric furnace steelmaking dust treated with lime by Ca mixed heating means 11 was put into 300 ml of alkaline 2M-NaOH solution, and a test was conducted to examine the effect of solution concentration and temperature on zinc leaching rate. .
- the temperature of the aqueous solution was 25 ° C, 40 ° C, 50 ° C, and 70 ° C.
- the result of the leaching test is shown in FIG. As shown in FIG. 6, it was confirmed that all zinc can be leached into the solution from the lime-treated dust within a few hours by keeping the 2M-NaOH aqueous solution at 70 ° C. It was also confirmed that 2CaO ⁇ Fe 2 O 3 can be recovered as a residue with almost no dissolution in the solution. In addition, it is not preferable in terms of input energy to heat the NaOH aqueous solution over 100 ° C.
- the aqueous solution in which ZnO has been leached by the leaching means 31 is electrolyzed by the electrolytic collection means 32. Thereby, zinc can be deposited on the cathode and high-purity metallic zinc can be recovered.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Environmental & Geological Engineering (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
- Electrolytic Production Of Metals (AREA)
Abstract
Description
図1乃至図6は、本発明の実施の形態の電気炉製鋼ダストからの亜鉛回収方法および電気炉製鋼ダストからの亜鉛回収装置を示している。
図1に示すように、本発明の実施の形態の電気炉製鋼ダストからの亜鉛回収装置は、Ca混合加熱手段11と鉄粉混合手段12と還元揮発手段13と亜鉛取得手段14とを有している。
表1に示す電気炉製鋼ダストに、生石灰(CaO)を当量添加して混合し、3時間加熱した場合について、亜鉛(Zn)、鉄(Fe)、塩素(Cl)、フッ素(F)、鉛(Pb)、カドミウム(Cd)の揮発量と保持温度との関係を調べた。その結果を、図3(c)および(d)に示す。また、比較のため、生石灰(CaO)を添加しない場合についても同様の試験を行い、その結果を図3(a)および(b)に示す。
電気炉製鋼ダスト中の鉄濃度以上のCaOを添加し、空気中で、1100℃で3時間加熱したダスト試料を用意し、これにZnO/Feのモル比が1になるように電解鉄粉を加えて混合・圧粉し、図2の還元揮発手段13の試料保持容器22の内部にセットした。その後、減圧容器21の内部を真空ポンプで減圧しながら試料保持容器22を1000℃で約1時間保持し、(3)式に従って発生した亜鉛蒸気を、冷却ゾーンに設置した低温凝縮管24の表面に凝縮させた。ダスト中の亜鉛は、1時間以内に全て還元されて揮発し、試験後の残渣は、2CaO・Fe2O3のみであった。なお、比較のため、石灰処理をしない熱処理済みのダストについても同様の金属鉄粉を加えた試験を実施した。
Znの融点より低い融点であるNaCl-KClベースの多元系塩化物フラックスを用いて、亜鉛の溶解試験を行った。亜鉛片とフラックスとを共にアルミナるつぼに入れ、450℃で再溶解させた。溶解前はフレーク状、粒状で表面が酸化された状態であった亜鉛片が、フラックス溶解後はほぼ健全なインゴットとなった。化学分析の結果、亜鉛の純度は99%以上であった。
Ca混合加熱手段11により石灰処理を行った電気炉製鋼ダスト 1gを、アルカリ性の2M-NaOH溶液 300ミリリットルに投入し、亜鉛の浸出率に及ぼす溶液濃度の影響および温度の影響を調べる試験を行った。水溶液の温度は、25℃、40℃、50℃、70℃とした。その浸出試験の結果を、図6に示す。図6に示すように、2M-NaOH水溶液を70℃に保持すれば、数時間で石灰処理ダストから全ての亜鉛を溶液中に浸出できることが確認された。また、2CaO・Fe2O3は、ほとんど溶液中に溶解することなく、残渣として回収可能であることも確認された。なお、100℃を越えてNaOH水溶液を加熱するのは、投入エネルギー的に好ましくない。
12 鉄粉混合手段
13 還元揮発手段
21 減圧容器
22 試料保持容器
23 断熱管
24 低温凝縮管
25 排気管
14 亜鉛取得手段
1 圧粉体
2 亜鉛蒸気
3 金属亜鉛片
31 浸出手段
32 電解採取手段
Claims (10)
- 電気炉製鋼ダストと、その電気炉製鋼ダスト中のFeのモル数と当量以上のモル数のCaを含むカルシウム化合物とを混合後、非還元性雰囲気中で960℃以上、1100℃以下で1~3時間熱処理して、ZnOと2CaO・Fe2O3とを得るCa混合加熱工程と、
前記Ca混合加熱工程で得られたZnOと2CaO・Fe2O3とに、前記ZnOのモル数と当量以上のモル数の鉄粉末を混合し、圧粉する鉄粉混合工程と、
前記鉄粉混合工程による圧粉体を減圧容器の内部に配置し、前記減圧容器の内部を減圧するとともに加熱して亜鉛蒸気を発生させ、前記亜鉛蒸気を冷却凝固して固体の亜鉛片を得る還元揮発工程と、
前記還元揮発工程で得られた亜鉛片を、亜鉛の融点より低い融点を有するNaCl-KClベースの多元系塩化物系フラックスに溶解させた後、冷却して、塊状の亜鉛を得る亜鉛取得工程とを、
有することを特徴とする電気炉製鋼ダストからの亜鉛回収方法。 - 電気炉製鋼ダストと、その電気炉製鋼ダスト中のFeのモル数と当量以上のモル数のCaを含むカルシウム化合物とを混合後、非還元性雰囲気中で960℃以上、1100℃以下で1~3時間熱処理して、ZnOと2CaO・Fe2O3とを得るCa混合加熱工程と、
前記Ca混合加熱工程で得られたZnOと2CaO・Fe2O3とを、アルカリ性または中性の水溶液中に浸漬して、ZnOを選択的に前記水溶液中に浸出させる浸出工程と、
前記浸出工程でZnOが浸出した前記水溶液を電解して、陰極に亜鉛を析出させる電解採取工程とを、
有することを特徴とする電気炉製鋼ダストからの亜鉛回収方法。 - 前記浸出工程は、前記Ca混合加熱工程で得られたZnOと2CaO・Fe2O3とを、70℃以上100℃以下の前記水溶液に浸漬させることを特徴とする請求項2記載の電気炉製鋼ダストからの亜鉛回収方法。
- 前記浸出工程の前記水溶液はNaOH水溶液またはNH4Cl水溶液であることを特徴とする請求項2または3記載の電気炉製鋼ダストからの亜鉛回収方法。
- 前記カルシウム化合物は、生石灰、石灰石および消石灰のうちの少なくとも1つから成ることを特徴とする請求項1乃至4のいずれか1項に記載の電気炉製鋼ダストからの亜鉛回収方法。
- 電気炉製鋼ダストと、その電気炉製鋼ダスト中のFeのモル数と当量以上のモル数のCaを含むカルシウム化合物とを混合後、非還元性雰囲気中で960℃以上、1100℃以下で1~3時間熱処理して、ZnOと2CaO・Fe2O3とを取得可能に設けられたCa混合加熱手段と、
前記Ca混合加熱手段で得られたZnOと2CaO・Fe2O3とに、前記ZnOのモル数と当量以上のモル数の鉄粉末を混合し、圧粉するよう設けられた鉄粉混合手段と、
減圧容器を有し、前記鉄粉混合手段による圧粉体を前記減圧容器の内部に配置し、前記減圧容器の内部を減圧するとともに加熱して亜鉛蒸気を発生させ、前記亜鉛蒸気を冷却凝固して固体の亜鉛片を取得可能に設けられた還元揮発手段と、
前記還元揮発手段で得られた亜鉛片を、亜鉛の融点より低い融点を有するNaCl-KClベースの多元系塩化物系フラックスに溶解させた後、冷却して、塊状の亜鉛を取得可能に設けられた亜鉛取得手段とを、
有することを特徴とする電気炉製鋼ダストからの亜鉛回収装置。 - 電気炉製鋼ダストと、その電気炉製鋼ダスト中のFeのモル数と当量以上のモル数のCaを含むカルシウム化合物とを混合後、非還元性雰囲気中で960℃以上、1100℃以下で1~3時間熱処理して、ZnOと2CaO・Fe2O3とを取得可能に設けられたCa混合加熱手段と、
前記Ca混合加熱手段で得られたZnOと2CaO・Fe2O3とを、アルカリ性または中性の水溶液中に浸漬して、ZnOを選択的に前記水溶液中に浸出させるよう設けられた浸出手段と、
前記浸出手段でZnOが浸出した前記水溶液を電解して、陰極に亜鉛を析出可能に設けられた電解採取手段とを、
有することを特徴とする電気炉製鋼ダストからの亜鉛回収装置。 - 前記浸出手段は、前記Ca混合加熱手段で得られたZnOと2CaO・Fe2O3とを、70℃以上100℃以下の前記水溶液に浸漬させるよう構成されていることを特徴とする請求項7記載の電気炉製鋼ダストからの亜鉛回収装置。
- 前記浸出手段の前記水溶液はNaOH水溶液またはNH4Cl水溶液であることを特徴とする請求項7または8記載の電気炉製鋼ダストからの亜鉛回収装置。
- 前記カルシウム化合物は、生石灰、石灰石および消石灰のうちの少なくとも1つから成ることを特徴とする請求項6乃至9のいずれか1項に記載の電気炉製鋼ダストからの亜鉛回収装置。
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US14/909,392 US20160177416A1 (en) | 2013-07-30 | 2014-07-18 | Method for recovering zinc from electric furnace steelmaking dust and device for recovering zinc from electric furnace steelmaking dust |
KR1020167002624A KR20160034927A (ko) | 2013-07-30 | 2014-07-18 | 전기로 제강 더스트로부터의 아연 회수 방법 및 전기로 제강 더스트로부터의 아연 회수 장치 |
EP14831593.0A EP3029166A4 (en) | 2013-07-30 | 2014-07-18 | METHOD FOR RECOVERING ZINC FROM ELECTRIC OVEN STEEL DUST PRODUCTION AND ZINC RECOVERING DEVICE FROM ELECTRIC FURNACE DIE PRODUCTION DUST |
JP2015529518A JP6406675B2 (ja) | 2013-07-30 | 2014-07-18 | 電気炉製鋼ダストからの亜鉛回収方法および電気炉製鋼ダストからの亜鉛回収装置 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2013-157305 | 2013-07-30 | ||
JP2013157305 | 2013-07-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2015016086A1 true WO2015016086A1 (ja) | 2015-02-05 |
Family
ID=52431624
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2014/069184 WO2015016086A1 (ja) | 2013-07-30 | 2014-07-18 | 電気炉製鋼ダストからの亜鉛回収方法および電気炉製鋼ダストからの亜鉛回収装置 |
Country Status (5)
Country | Link |
---|---|
US (1) | US20160177416A1 (ja) |
EP (1) | EP3029166A4 (ja) |
JP (1) | JP6406675B2 (ja) |
KR (1) | KR20160034927A (ja) |
WO (1) | WO2015016086A1 (ja) |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6113344B1 (ja) * | 2016-04-28 | 2017-04-12 | 国立大学法人東北大学 | 鉄鋼ダストの処理方法、亜鉛の生産方法及び還元鉄の生産方法 |
CN106978535A (zh) * | 2017-03-20 | 2017-07-25 | 云南驰宏锌锗股份有限公司 | 一种带余热锅炉烟化炉的开炉方法 |
CN107022680A (zh) * | 2017-03-20 | 2017-08-08 | 云南驰宏锌锗股份有限公司 | 一种带余热锅炉烟化炉的全冷料开炉方法 |
CN109987865A (zh) * | 2019-04-22 | 2019-07-09 | 莒县中联水泥有限公司 | 高硅石灰石在水泥熟料生产中的应用 |
WO2022118927A1 (ja) * | 2020-12-04 | 2022-06-09 | 株式会社キノテック | 亜鉛の製造方法 |
Families Citing this family (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR102370860B1 (ko) * | 2014-03-25 | 2022-03-07 | 후루카와 덴키 고교 가부시키가이샤 | 구리합금 판재, 커넥터, 및 구리합금 판재의 제조방법 |
CN106756095A (zh) * | 2016-11-24 | 2017-05-31 | 云南昆欧科技有限责任公司 | 一种钢铁企业转底炉收尘灰的利用方法 |
CN107385230A (zh) * | 2017-07-31 | 2017-11-24 | 重庆科技学院 | 一种炼钢粉尘回收利用方法及其使用的真空还原电炉设备 |
CN110387476B (zh) * | 2019-08-20 | 2021-04-02 | 昆明理工大学 | 一种电磁强化黄磷电除尘灰浸出回收高纯钾的方法 |
CN111302386A (zh) * | 2020-02-14 | 2020-06-19 | 北京科技大学 | 一种富锌冶金尘泥和半干法脱硫灰协同资源化方法 |
CN113061746A (zh) * | 2021-03-24 | 2021-07-02 | 常州市左贤机械制造有限公司 | 一种锌液流量控制装置 |
CN114769269A (zh) * | 2022-04-27 | 2022-07-22 | 宁波江丰电子材料股份有限公司 | 一种超高纯铜系残靶的循环再利用方法 |
Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3512959A (en) * | 1967-09-27 | 1970-05-19 | Rossborough Supply Co | Method of preparing melts of zinc base alloys and improved flux therefor |
JPS56102530A (en) * | 1980-01-16 | 1981-08-17 | Sosuke Uchida | Recovering method for zinc from zinc dross by liquation |
JPH09268332A (ja) | 1996-04-01 | 1997-10-14 | Nkk Corp | 製鉄ダストからの酸化亜鉛の回収装置 |
JP2003027155A (ja) * | 2001-07-09 | 2003-01-29 | Topy Ind Ltd | 亜鉛濃縮用成形体及び該成形体を使用する製鋼ダスト中の亜鉛の濃縮方法 |
JP2008291292A (ja) * | 2007-05-23 | 2008-12-04 | Takeshi Azagami | 溶融亜鉛の製造方法 |
JP2009030121A (ja) | 2007-07-27 | 2009-02-12 | Tohoku Univ | 電気炉ダストからの酸化亜鉛の回収方法 |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5258055A (en) * | 1992-08-31 | 1993-11-02 | International Mill Service, Inc. | Process and system for recovering zinc and other metal vapors from a gaseous stream |
WO2009129823A1 (de) * | 2008-04-23 | 2009-10-29 | Arcelormittal Bremen Gmbh | Herstellung von calciumferrit-sintern aus zink- /bleihaltigen eisenreststoffen zur verwertung derselben |
-
2014
- 2014-07-18 KR KR1020167002624A patent/KR20160034927A/ko not_active Application Discontinuation
- 2014-07-18 JP JP2015529518A patent/JP6406675B2/ja active Active
- 2014-07-18 EP EP14831593.0A patent/EP3029166A4/en not_active Withdrawn
- 2014-07-18 WO PCT/JP2014/069184 patent/WO2015016086A1/ja active Application Filing
- 2014-07-18 US US14/909,392 patent/US20160177416A1/en not_active Abandoned
Patent Citations (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3512959A (en) * | 1967-09-27 | 1970-05-19 | Rossborough Supply Co | Method of preparing melts of zinc base alloys and improved flux therefor |
JPS56102530A (en) * | 1980-01-16 | 1981-08-17 | Sosuke Uchida | Recovering method for zinc from zinc dross by liquation |
JPH09268332A (ja) | 1996-04-01 | 1997-10-14 | Nkk Corp | 製鉄ダストからの酸化亜鉛の回収装置 |
JP2003027155A (ja) * | 2001-07-09 | 2003-01-29 | Topy Ind Ltd | 亜鉛濃縮用成形体及び該成形体を使用する製鋼ダスト中の亜鉛の濃縮方法 |
JP2008291292A (ja) * | 2007-05-23 | 2008-12-04 | Takeshi Azagami | 溶融亜鉛の製造方法 |
JP2009030121A (ja) | 2007-07-27 | 2009-02-12 | Tohoku Univ | 電気炉ダストからの酸化亜鉛の回収方法 |
Non-Patent Citations (5)
Title |
---|
CHAIRAKSA R. ET AL.: "Alkaline Leaching of Zinc from CaO Treated EAF Dust, Current advances in materials and processes", REPORT OF THE ISIJ MEETING (CAMP-ISIJ, vol. 23, no. 2, 1 September 2010 (2010-09-01), pages 1038, XP008179511 * |
CHAIRAKSA R. ET AL.: "Reduction of ZnO in Lime Treated EAF dust with Solid Iron Powder, Current advances in materials and processes", REPORT OF THE ISIJ MEETING (CAMP-ISIJ, vol. 24, no. 2, 1 September 2011 (2011-09-01), pages 761, XP008179507 * |
CHAIRAKSA ROMCHAT ET AL.: "New Zinc Recovery Process from EAF Dust by Lime Addition", IRON & STEEL TECHNOLOGY CONFERENCE PROCEEDINGS, vol. 1, 3 May 2010 (2010-05-03), pages 271 - 281, XP008179514 * |
ITOH SATOSHI ET AL.: "New EAF Dust Treatment Process with the Aid of Strong Magnetic Field", ISIJ INTERNATIONAL, vol. 48, no. 10, 15 October 2008 (2008-10-15), pages 1339 - 1344, XP055259065 * |
See also references of EP3029166A4 |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6113344B1 (ja) * | 2016-04-28 | 2017-04-12 | 国立大学法人東北大学 | 鉄鋼ダストの処理方法、亜鉛の生産方法及び還元鉄の生産方法 |
WO2017187973A1 (ja) * | 2016-04-28 | 2017-11-02 | 国立大学法人東北大学 | 鉄鋼ダストの処理方法、亜鉛の生産方法、鉄鋼原料の生産方法、及び鉄鋼原料 |
KR20190003577A (ko) | 2016-04-28 | 2019-01-09 | 고쿠리츠다이가쿠호진 도호쿠다이가쿠 | 철강 더스트의 처리 방법, 아연의 생산 방법, 철강 원료의 생산 방법, 및 철강 원료 |
TWI647315B (zh) * | 2016-04-28 | 2019-01-11 | 國立大學法人東北大學 | 鋼鐵粉塵的處理方法、鋅的生產方法以及鋼鐵原料的生產方法 |
EP3450580A4 (en) * | 2016-04-28 | 2019-10-30 | Tohoku University | METHOD FOR PROCESSING IRON AND STEEL DUST, ZINC MANUFACTURING METHOD, METHOD FOR PRODUCING AN INITIAL MATERIAL FOR IRON AND STEEL, AND EXTRACT MATERIAL FOR IRON AND STEEL |
CN106978535A (zh) * | 2017-03-20 | 2017-07-25 | 云南驰宏锌锗股份有限公司 | 一种带余热锅炉烟化炉的开炉方法 |
CN107022680A (zh) * | 2017-03-20 | 2017-08-08 | 云南驰宏锌锗股份有限公司 | 一种带余热锅炉烟化炉的全冷料开炉方法 |
CN106978535B (zh) * | 2017-03-20 | 2018-05-18 | 云南驰宏锌锗股份有限公司 | 一种带余热锅炉烟化炉的开炉方法 |
CN109987865A (zh) * | 2019-04-22 | 2019-07-09 | 莒县中联水泥有限公司 | 高硅石灰石在水泥熟料生产中的应用 |
WO2022118927A1 (ja) * | 2020-12-04 | 2022-06-09 | 株式会社キノテック | 亜鉛の製造方法 |
Also Published As
Publication number | Publication date |
---|---|
EP3029166A4 (en) | 2016-12-07 |
US20160177416A1 (en) | 2016-06-23 |
JPWO2015016086A1 (ja) | 2017-03-02 |
KR20160034927A (ko) | 2016-03-30 |
JP6406675B2 (ja) | 2018-10-17 |
EP3029166A1 (en) | 2016-06-08 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6406675B2 (ja) | 電気炉製鋼ダストからの亜鉛回収方法および電気炉製鋼ダストからの亜鉛回収装置 | |
Chairaksa-Fujimoto et al. | The selective alkaline leaching of zinc oxide from Electric Arc Furnace dust pre-treated with calcium oxide | |
Bian et al. | Recovery of rare earth elements from permanent magnet scraps by pyrometallurgical process | |
EP3404121B1 (en) | Method for separating rare-earth elements from iron, and rare-earth element-containing slag | |
JP2014051718A (ja) | 希土類分離方法及び希土類分離装置 | |
WO2014181833A1 (ja) | 亜鉛製造方法 | |
Zhang et al. | Recovery of zinc from electric arc furnace dust by alkaline pressure leaching using iron as a reductant | |
JP5137110B2 (ja) | 電気炉ダストからの酸化亜鉛の回収方法 | |
TWI647315B (zh) | 鋼鐵粉塵的處理方法、鋅的生產方法以及鋼鐵原料的生產方法 | |
AU2021301442B2 (en) | Recovery of rare earth metals from ferromagnetic alloys | |
Vafeias et al. | Alkaline alumina recovery from bauxite residue slags | |
WO2017034009A1 (ja) | 軽希土類元素と重希土類元素を分離するために有用な方法 | |
WO2022003694A1 (en) | Recovery of rare earth metals from ferromagnetic alloys | |
JP2019026871A (ja) | 希土類フッ化物の製造方法 | |
JP5678470B2 (ja) | 脱銅スラグの処理方法 | |
WO2023157826A1 (ja) | 亜鉛回収方法 | |
WO2024053596A1 (ja) | スカンジウムの回収方法 | |
JP2022110887A (ja) | 希土類元素の回収方法 | |
JP2008291292A (ja) | 溶融亜鉛の製造方法 | |
EA046348B1 (ru) | Извлечение редкоземельных металлов из ферромагнитных сплавов | |
JP5857751B2 (ja) | 硫化物系の脱銅スラグの処理方法 | |
JP2016186121A (ja) | 希土類元素含有物からの希土類元素回収方法 | |
JP2018053351A (ja) | 亜鉛の分離方法、亜鉛材料の製造方法および鉄材料の製造方法 | |
KR20120131698A (ko) | 전기로 제강분진의 금속염화물로부터 납 추출방법 | |
JP2016186122A (ja) | 希土類元素含有物からの希土類元素回収方法 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 14831593 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2015529518 Country of ref document: JP Kind code of ref document: A Ref document number: 20167002624 Country of ref document: KR Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: DE |
|
WWE | Wipo information: entry into national phase |
Ref document number: 14909392 Country of ref document: US |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2014831593 Country of ref document: EP |