CN106929667A - A kind of method for processing zinc leaching residue - Google Patents
A kind of method for processing zinc leaching residue Download PDFInfo
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- CN106929667A CN106929667A CN201710146708.1A CN201710146708A CN106929667A CN 106929667 A CN106929667 A CN 106929667A CN 201710146708 A CN201710146708 A CN 201710146708A CN 106929667 A CN106929667 A CN 106929667A
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- Prior art keywords
- zinc
- leaching residue
- zinc leaching
- iron
- reduction
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- 239000011701 zinc Substances 0.000 title claims abstract description 116
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 115
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 111
- 238000002386 leaching Methods 0.000 title claims abstract description 62
- 238000000034 method Methods 0.000 title claims abstract description 61
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 91
- 229910052742 iron Inorganic materials 0.000 claims abstract description 44
- 229910052738 indium Inorganic materials 0.000 claims abstract description 38
- APFVFJFRJDLVQX-UHFFFAOYSA-N indium atom Chemical compound [In] APFVFJFRJDLVQX-UHFFFAOYSA-N 0.000 claims abstract description 38
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims abstract description 33
- 229910052802 copper Inorganic materials 0.000 claims abstract description 33
- 239000010949 copper Substances 0.000 claims abstract description 33
- 238000005453 pelletization Methods 0.000 claims abstract description 23
- 239000012320 chlorinating reagent Substances 0.000 claims abstract description 20
- 239000002184 metal Substances 0.000 claims abstract description 19
- 229910052751 metal Inorganic materials 0.000 claims abstract description 19
- 239000008188 pellet Substances 0.000 claims abstract description 19
- 239000011230 binding agent Substances 0.000 claims abstract description 16
- 239000003638 chemical reducing agent Substances 0.000 claims abstract description 15
- 238000001035 drying Methods 0.000 claims abstract description 7
- 238000006722 reduction reaction Methods 0.000 claims description 23
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical group [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 claims description 10
- 239000002893 slag Substances 0.000 claims description 8
- 229920002472 Starch Polymers 0.000 claims description 5
- 239000011780 sodium chloride Substances 0.000 claims description 5
- 239000008107 starch Substances 0.000 claims description 5
- 235000019698 starch Nutrition 0.000 claims description 5
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 claims description 4
- 239000001110 calcium chloride Substances 0.000 claims description 4
- 229910001628 calcium chloride Inorganic materials 0.000 claims description 4
- VEUACKUBDLVUAC-UHFFFAOYSA-N [Na].[Ca] Chemical compound [Na].[Ca] VEUACKUBDLVUAC-UHFFFAOYSA-N 0.000 claims 1
- 229940084030 carboxymethylcellulose calcium Drugs 0.000 claims 1
- 239000011133 lead Substances 0.000 abstract description 46
- 238000006243 chemical reaction Methods 0.000 abstract description 15
- 238000011946 reduction process Methods 0.000 abstract description 13
- 230000007261 regionalization Effects 0.000 abstract description 12
- 230000011218 segmentation Effects 0.000 abstract description 12
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005660 chlorination reaction Methods 0.000 description 10
- 238000011084 recovery Methods 0.000 description 9
- 229910001510 metal chloride Inorganic materials 0.000 description 8
- 239000000203 mixture Substances 0.000 description 8
- 239000000126 substance Substances 0.000 description 8
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 6
- 238000010951 particle size reduction Methods 0.000 description 6
- 239000000243 solution Substances 0.000 description 6
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 5
- UCKMPCXJQFINFW-UHFFFAOYSA-N Sulphide Chemical compound [S-2] UCKMPCXJQFINFW-UHFFFAOYSA-N 0.000 description 5
- 239000005864 Sulphur Substances 0.000 description 5
- 238000009835 boiling Methods 0.000 description 5
- 229910052799 carbon Inorganic materials 0.000 description 5
- 239000003245 coal Substances 0.000 description 5
- 239000003500 flue dust Substances 0.000 description 5
- 238000001465 metallisation Methods 0.000 description 5
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 4
- 239000000428 dust Substances 0.000 description 4
- 239000003546 flue gas Substances 0.000 description 4
- 150000002472 indium compounds Chemical class 0.000 description 4
- 229910052935 jarosite Inorganic materials 0.000 description 4
- RHZUVFJBSILHOK-UHFFFAOYSA-N anthracen-1-ylmethanolate Chemical compound C1=CC=C2C=C3C(C[O-])=CC=CC3=CC2=C1 RHZUVFJBSILHOK-UHFFFAOYSA-N 0.000 description 3
- 239000003830 anthracite Substances 0.000 description 3
- SURQXAFEQWPFPV-UHFFFAOYSA-L iron(2+) sulfate heptahydrate Chemical compound O.O.O.O.O.O.O.[Fe+2].[O-]S([O-])(=O)=O SURQXAFEQWPFPV-UHFFFAOYSA-L 0.000 description 3
- 229910000359 iron(II) sulfate Inorganic materials 0.000 description 3
- -1 zinc-copper indium Chloride Chemical compound 0.000 description 3
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 2
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- DPXJVFZANSGRMM-UHFFFAOYSA-N acetic acid;2,3,4,5,6-pentahydroxyhexanal;sodium Chemical compound [Na].CC(O)=O.OCC(O)C(O)C(O)C(O)C=O DPXJVFZANSGRMM-UHFFFAOYSA-N 0.000 description 2
- 239000002253 acid Substances 0.000 description 2
- 229940037003 alum Drugs 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 2
- 238000001354 calcination Methods 0.000 description 2
- 239000001768 carboxy methyl cellulose Substances 0.000 description 2
- IYRDVAUFQZOLSB-UHFFFAOYSA-N copper iron Chemical compound [Fe].[Cu] IYRDVAUFQZOLSB-UHFFFAOYSA-N 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 235000019812 sodium carboxymethyl cellulose Nutrition 0.000 description 2
- 229920001027 sodium carboxymethylcellulose Polymers 0.000 description 2
- JIAARYAFYJHUJI-UHFFFAOYSA-L zinc dichloride Chemical compound [Cl-].[Cl-].[Zn+2] JIAARYAFYJHUJI-UHFFFAOYSA-L 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- ZAMOUSCENKQFHK-UHFFFAOYSA-N Chlorine atom Chemical compound [Cl] ZAMOUSCENKQFHK-UHFFFAOYSA-N 0.000 description 1
- 229910000640 Fe alloy Inorganic materials 0.000 description 1
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- QHSFHBRFVUUBJK-UHFFFAOYSA-N [Cu].[Zn].[In] Chemical compound [Cu].[Zn].[In] QHSFHBRFVUUBJK-UHFFFAOYSA-N 0.000 description 1
- 230000002411 adverse Effects 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000460 chlorine Substances 0.000 description 1
- 229910052801 chlorine Inorganic materials 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 229910000960 colored gold Inorganic materials 0.000 description 1
- ORTQZVOHEJQUHG-UHFFFAOYSA-L copper(II) chloride Chemical compound Cl[Cu]Cl ORTQZVOHEJQUHG-UHFFFAOYSA-L 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052598 goethite Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 238000009854 hydrometallurgy Methods 0.000 description 1
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 description 1
- 238000005470 impregnation Methods 0.000 description 1
- 239000003978 infusion fluid Substances 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- LIKBJVNGSGBSGK-UHFFFAOYSA-N iron(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Fe+3].[Fe+3] LIKBJVNGSGBSGK-UHFFFAOYSA-N 0.000 description 1
- JQJCSZOEVBFDKO-UHFFFAOYSA-N lead zinc Chemical compound [Zn].[Pb] JQJCSZOEVBFDKO-UHFFFAOYSA-N 0.000 description 1
- HWSZZLVAJGOAAY-UHFFFAOYSA-L lead(II) chloride Chemical compound Cl[Pb]Cl HWSZZLVAJGOAAY-UHFFFAOYSA-L 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 230000003647 oxidation Effects 0.000 description 1
- 238000007254 oxidation reaction Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011592 zinc chloride Substances 0.000 description 1
- 235000005074 zinc chloride Nutrition 0.000 description 1
- WGEATSXPYVGFCC-UHFFFAOYSA-N zinc ferrite Chemical group O=[Zn].O=[Fe]O[Fe]=O WGEATSXPYVGFCC-UHFFFAOYSA-N 0.000 description 1
- 239000011787 zinc oxide Substances 0.000 description 1
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
- C22B1/00—Preliminary treatment of ores or scrap
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/2406—Binding; Briquetting ; Granulating pelletizing
-
- 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
- C22B1/02—Roasting processes
- C22B1/08—Chloridising roasting
-
- 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
- C22B1/14—Agglomerating; Briquetting; Binding; Granulating
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
-
- 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
- C22B13/00—Obtaining lead
- C22B13/02—Obtaining lead by dry processes
- C22B13/025—Recovery from waste materials
-
- 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
- C22B15/0054—Slag, slime, speiss, or dross treating
-
- 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
-
- 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
- C22B58/00—Obtaining gallium or indium
-
- 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
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Organic Chemistry (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Manufacturing & Machinery (AREA)
- Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geology (AREA)
- Geochemistry & Mineralogy (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
The present invention relates to a kind of method for processing zinc leaching residue, it is characterised in that including step：A. mixed pelletizing：It is well mixed after chlorinating agent, reducing agent and binding agent are added after zinc leaching residue is crushed, then the pelletizing in disc balling machine, transporting to rotary hearth furnace after the carbonaceous pelletizing drying for obtaining participates in reacting；B. chloridising roasting and reduction：Time to the temperature sum in chloridising roasting and reduction process carries out segmentation and regionalization control, makes the carbonaceous pelletizing that chloridising roasting and reduction are carried out in the rotary hearth furnace, reclaims non-ferrous metal, collects the metallized pellet obtained after reaction；C. iron is reclaimed：The metallized pellet is carried out into mill ore magnetic selection and is recycled iron.The method of the treatment zinc leaching residue provided by the present invention, can realize efficiently separating for lead, zinc, copper, indium and iron, and the method is energy-saving, reduces production cost.
Description
Technical field
The invention belongs to metallurgical and energy field, more particularly to a kind of method that chloridising roasting processes zinc leaching residue.
Background technology
Based on China's zinc abstraction technology is smelted in a wet process.By the difference of leachate deferrization process, goethite can be divided into
Method, hematite process and jarosite process etc..Wherein, jarosite process due to easy Precipitation, solubility is low, filterability is good, examination
Agent consumption is few and low production cost and it is most widely used.It is exactly the ferro element in zinc infusion solution by the heavy alum operation of jarosite process
Precipitation is formed selectively, so as to reach the final purpose that iron and zinc are separate.But except forming siderotil during heavy alum, also
The valuable metals such as some zinc, lead, silver are in the form of silicate and sulfate and siderotil enters iron vitriol slag together.Based on Huang
The advantage of krausite method technique, in Zinc hydrometallurgy process, the yield that the whole nation has 45% is smelted by the technique, but
It is that the siderotil amount that hot acid-jarosite process is produced is big, pollutes big.The siderotil quantity of slag is stored up more than 30,000,000 tons by current China, and
To be increased with 1,000,000 tons of speed every year, huge potential pollution is produced to environment；Metal loss is big simultaneously, if iron vitriol slag
By averagely being calculated containing zinc 5%, accumulate zinc amount of metal more than 1,500,000 tons, value is very high.2 points based on more than, to iron vitriol slag
Further investigation, turns waste into wealth, and is significant.
At present to the current main high temperature reduction volatility process of processing method and aqueous solution leaching method two types of zinc leaching residue.
High temperature reduction volatility process is to allocate coke powder into zinc leaching residue as reducing agent, and high-temperature roasting is carried out in rotary kiln or fuming furnace
Or melting, make the reduction volatilizations such as valuable metal lead, zinc, silver, indium.Aqueous solution leaching method has two types, and one kind is direct
Zinc leaching residue is leached with acid or alkali；Be for second by zinc leaching residue between 500-700 DEG C advance calcination, through the slag after calcination
The metal in zinc leaching residue is leached using acid or aqueous slkali again.The advantage of high temperature reduction volatility process can be to reclaim zinc leaching residue simultaneously
In lead, zinc, indium etc., these elements are all collected into zinc oxide fumes, but the method high energy consumption, and output containing scum
Due to being in melt state during the zinc that volatilizees, a large amount of silicate are mixed into melt, cause the yield containing iron in scum relatively low.Water
The advantage of solution lixiviation process is that Zn content is higher in reaching 55% or so, but slag through the content containing iron in scum after leaching, zinc
Content is universal more than 1%, exists in zinc ferrite form because this part zinc is mainly, when iron is used as iron-smelting raw material, zinc
Ironmaking processes can be adversely affected.
The content of the invention
Above-mentioned technical problem is faced, the present invention is intended to provide a kind of method for processing zinc leaching residue, to realize lead, zinc, copper, indium
With efficiently separating for iron, energy-saving, the purpose of saving production cost.
To achieve the above object, the present invention proposes a kind of method for processing zinc leaching residue, it is characterised in that including step：
A. mixed pelletizing：After zinc leaching residue is crushed, chlorinating agent, reducing agent and binding agent are added, be well mixed afterwards, Ran Hou
Pelletizing in disc balling machine, the carbonaceous pelletizing obtained after drying；
B. chloridising roasting and reduction：Chloridising roasting, reduction are carried out during carbonaceous pelletizing after drying is delivered into rotary hearth furnace；Obtain
Metallized pellet；
C. iron is reclaimed：The metallized pellet is carried out into mill ore magnetic selection, iron is recycled.
Specifically, in stepb, the time to the temperature sum in chloridising roasting and reduction process carry out segmentation and regionalization control
System, makes the carbonaceous pelletizing that chloridising roasting and reduction are carried out in the rotary hearth furnace, reclaims non-ferrous metal, collects what reaction was obtained
Metallized pellet.
Further, the segmentation and regionalization control refers to that chloridising roasting and reduction process are divided into preheating zone and high-temperature region,
Wherein, preheating zone temperature control is in 500 DEG C~1000 DEG C, 1000 DEG C~1250 DEG C of high-temperature region.
Preferably, the total time of chloridising roasting and reduction reaction is controlled in 30-40min.
Further, following components is included according to percentage by weight in the zinc leaching residue：：
Full iron 30~40wt%, zinc 16-20wt%, 1~5wt% of lead, 0.5~2wt% of copper, indium 0.16-0.25wt%.
Preferably, by below the particle size reduction of zinc leaching residue described in 80% to 200 mesh.
Specifically, the chlorinating agent is NaCl or CaCl2。
Further, by the chlorinating agent Task-size Controlling in 200 mesh~100 mesh.
Preferably, the percentage by weight that the chlorinating agent accounts for the zinc leaching residue is controlled in 5wt%~20wt%.
Further, reducing agent used is anthracite, and in below 1mm, addition accounts for the weight of the zinc leaching residue to Task-size Controlling
Amount percentage is 5wt%~10wt%.
Preferably, the binding agent is organic binder bond, addition account for the percentage by weight of the zinc leaching residue for 5wt%~
10wt%.
Further, the organic binder bond is starch or sodium carboxymethylcellulose.
Had the following advantages using technical solutions according to the invention：
(1) iron 30~40% is contained in zinc leaching residue, the also substantial amounts of valuable metal such as lead, zinc, copper, indium, the method can be with
Realize many metal synthetical recoveries, can only be realized under traditional reducing atmosphere lead, zinc, the recovery of indium and can not realize that copper is separated with iron
Reclaim, after addition chlorinating agent, copper chloride can also be volatized into flue, it is achieved thereby that lead, zinc, copper, indium are separated with iron；
(2) chloridising roasting is carried out in rotary hearth furnace to be realized coloured with segmentation and regionalization controlling reaction temperature and the time of reaction
The subregion of metal chloride is reclaimed, and because the boiling point of metal chloride is relatively low, (inidum chloride boiling point is 498 DEG C, and zinc chloride boiling point is
732 DEG C, lead chloride boiling point is 954 DEG C), preheating zone temperature is 500 DEG C~1000 DEG C, therefore is that can be divided with achievement unit in preheating zone
The recovery of non-ferrous metal lead, zinc and indium, realizes the chloridising roasting of non-ferrous metal so as to inhibit iron to greatest extent at a temperature of this
Chlorination reaction；Under the conditions of 1000 DEG C~1250 DEG C of high-temperature region, remaining non-ferrous metal can have coloured gold by carbonaceous reducing agent
Category is further reclaimed, and is realized lead in zinc leaching residue, zinc, indium, copper and is further separated with iron, so as to get iron powder it is purer
Only, quality is higher；
(3) method of chloridising roasting is relatively low for atmosphere requirements in rotary hearth furnace, under the conditions of weakly reducing atmosphere, therefore can
To properly increase air-fuel ratio, natural gas consumption is reduced, so as to reduce production cost；
(4) the method reduces reduction coal consumption with addition of chlorinating agent, and the temperature of chlorination reaction is relatively low, reduces rotary hearth furnace
Heating-up temperature, realize it is energy-saving, while the reduction of coal dust contributes to the carrying out of chlorination reaction；
(5) conventional rotary hearth furnace typically carries out reduction reaction using carbonaceous reducing agent, it is difficult to realize efficiently separating for copper and iron,
The metal product for finally giving is copper-iron alloy, and can be realized copper separation and be returned using the method for chloridising roasting in rotary hearth furnace
Receive, so as to make the iron powder for obtaining purer.
Additional aspect of the invention and advantage will be set forth in part in the description, and will partly become from the following description
Obtain substantially, or recognized by practice of the invention.
Brief description of the drawings
Fig. 1 is the process chart for the treatment of zinc leaching residue of the invention.
Specific embodiment
Below in conjunction with drawings and Examples, specific embodiment of the invention is described in more details, so as to energy
Enough more fully understand the advantage of the solution of the present invention and its various aspects.However, specific embodiments described below and implementation
Example is only descriptive purpose, rather than limitation of the present invention.
It is an object of the invention to provide the present invention is intended to provide it is a kind of process zinc leaching residue method, with realize lead, zinc, copper,
Indium is efficiently separated with iron, energy-saving, saves the purpose of production cost.
To achieve the above object, the present invention proposes a kind of method for processing zinc leaching residue, such as Fig. 1, including step：
A. mixed pelletizing：After zinc leaching residue is crushed, chlorinating agent, reducing agent and binding agent are added, be well mixed afterwards, Ran Hou
Pelletizing in disc balling machine, the carbonaceous pelletizing obtained after drying；
B. chloridising roasting and reduction：Chloridising roasting, reduction are carried out during carbonaceous pelletizing after drying is delivered into rotary hearth furnace；Obtain
Metallized pellet；
Specifically, in stepb, the time to the temperature sum in chloridising roasting and reduction process carry out segmentation and regionalization control
System, makes the carbonaceous pelletizing that chloridising roasting and reduction are carried out in the rotary hearth furnace, reclaims non-ferrous metal, collects what reaction was obtained
Metallized pellet.
The chloridising roasting refers to after chlorinating agent reaches fusing point, chlorine, big portion to be generated with the oxygen reaction in dry gas atmosphere
Divide the oxide of lead, zinc, copper, indium that chlorination reaction occurs, generate corresponding metal chloride, the boiling point of metal chloride is general all
Than relatively low, volatile entrance flue；
In the reduction process, due to being weakly reducing atmosphere in rotary hearth furnace so that part lead, zinc impregnation in zinc kiln slag are closed
Thing is reduced to simple substance zinc, elementary lead, is volatized into flue, is reoxidized in flue in the form of oxide, sulfide
It is recovered into flue dust；
C. iron is reclaimed：The metallized pellet is carried out into mill ore magnetic selection and is recycled iron.
Further, the segmentation and regionalization control refers to that chloridising roasting and reduction process are divided into preheating zone and high-temperature region,
Wherein, preheating zone temperature control is in 500 DEG C~1000 DEG C, 1000 DEG C~1250 DEG C of high-temperature region.Preheating zone and high-temperature region mesh are set
Be to realize that non-ferrous metal segmentation and regionalization is reclaimed, this reduction temperature is lower than existing process reduction temperature, due to lead zinc-copper indium
Chloride fusing point is relatively low and volatile, therefore rotary hearth furnace temperature can be controlled in relatively low scope, and reduction temperature is less than this temperature
Degree, then be difficult to the volatilization of lead zinc-copper indium, and reduction temperature is too high, energy consumption can be caused to increase, the wasting of resources.
Preferably, total time of chloridising roasting and reduction reaction is controlled in 20-45min, it is ensured that lead in pelletizing, zinc, indium,
The volatility of the volatility of the non-ferrous metals such as copper, wherein lead more than 96.4%, more than 97.5%, wave for the volatility of zinc by copper
More than 80.2%, the volatility of indium is more than 95.3% for hair rate.The full Iron grade of metallized pellet of output is more than 40%, metal
More than 65%, the metallized pellet that rotary hearth furnace is obtained reclaims iron to rate by mill ore magnetic selection, and the rate of recovery of iron is more than 93%；
Further, following components is included according to percentage by weight in the zinc leaching residue：
Full iron 30~40wt%, zinc 16-20wt%, 1~5wt% of lead, 0.5~2wt% of copper, indium 0.16-0.25wt%.
Preferably, by below the particle size reduction of zinc leaching residue described in 80% to 200 mesh, it is both favourable that zinc leaching residue is crushed to the granularity
In the volatilization of lead zinc, while the contact area with chlorinating agent can be increased, contribute to the carrying out of chlorination reaction；
Specifically, the chlorinating agent is selected from NaCl (801 DEG C of fusing point) or CaCl2(782 DEG C of fusing point).
Further, by the chlorinating agent Task-size Controlling in 200 mesh~100 mesh.
Preferably, the percentage by weight that the chlorinating agent accounts for the zinc leaching residue is controlled in 5wt%~20wt%.
Further, reducing agent used be anthracite (for example：Fixed carbon 82.56%, volatile matter 6.49%, ash content
10.02%th, moisture 0.93%, sulphur 0.51%), in below 1mm, addition accounts for the percentage by weight of the zinc leaching residue to Task-size Controlling
It is 5wt%~10wt%.
Preferably, the binding agent is organic binder bond, addition account for the percentage by weight of the zinc leaching residue for 5wt%~
10wt%.
Make further specific detailed description, but this to the method for present invention treatment zinc leaching residue with reference to specific embodiment
The implementation method not limited to this of invention, for especially not dated technological parameter, can refer to routine techniques is carried out.
Embodiment 1
Using the lead in the technological process recovery zinc leaching residue of Fig. 1, zinc, indium, copper and iron, zinc leaching residue composition used and content
For：Full iron is 32.02wt%, and Zn content is 17.52wt%, and lead content is 4.23wt%, and indium content is 0.21wt%, copper content
It is 1.5wt%, more than 80% is accounted for below particle size reduction to 200 mesh, chlorinating agent used is CaCl2, granularity is 200 mesh~100
Between mesh, addition is the 10% of zinc leaching residue, and reducing agent used is anthracite：Fixed carbon 82.56%, volatile matter 6.49%, ash
Divide 10.02%, moisture 0.93%, sulphur 0.51%, addition is the 5% of zinc leaching residue, and binding agent used is starch solution, addition
Be the 6% of zinc leaching residue, four fully mix after carry out pelletizing, then transport to rotary hearth furnace segmentation and regionalization and control its chloridising roasting and also
Former process, chloridising roasting and reduction process are divided into preheating zone and high-temperature region, wherein, preheating zone temperature setting is 500 DEG C, high temperature
1100 DEG C of area, the total time of reaction is 45min, the flue gas produced during collection, and part lead, zinc, indium compound are reduced to list
Matter zinc, elementary lead, simple substance indium, are volatized into flue, are reoxidized in flue and are entered in the form of oxide, sulfide
Flue dust and be recovered, and most of lead, zinc, copper, the oxide of indium can occur chlorination reaction, generate corresponding metal chloride,
Flue is volatized into, realizes lead, zinc, indium, copper and separated with iron, the volatility of lead is 97.68% wherein in dust, zinc is waved
Hair rate is 99.22%, and, 81.2%, the volatility of indium is 96.3%, and the metallized pellet obtained after reaction is complete for the volatility of copper
Iron grade 44%, 68%, metallized pellet is 95.25% by the full Iron grade of mill ore magnetic selection to degree of metalization, and the rate of recovery is
96.63%.
Embodiment 2
The method of this implementation treatment zinc leaching residue is identical with the step of embodiment 1, but technological parameter is different, specific as follows：
Zinc leaching residue composition used and content are：Full iron is 35.72wt%, and Zn content is 16.97wt%, and lead content is
3.94wt%, indium content is 0.18wt%, and copper content is 1.8wt%, and more than 80%, institute are accounted for below particle size reduction to 200 mesh
It is CaCl with chlorinating agent2, granularity is between 200 mesh~100 mesh, addition is the 10% of zinc leaching residue, and reducing agent used is smokeless
Coal：Fixed carbon 82.56%, volatile matter 6.49%, ash content 10.02%, moisture 0.93%, sulphur 0.51%, addition is zinc leaching residue
5%, binding agent used be starch solution, addition for zinc leaching residue 6%, four fully mix after carry out pelletizing, it is then defeated
Its chloridising roasting and reduction process are controlled to rotary hearth furnace segmentation and regionalization, chloridising roasting and reduction process are divided into preheating zone and high temperature
Area, wherein, preheating zone temperature setting is 700 DEG C, 1000 DEG C of high-temperature region, and the total time of reaction is 35min.Produced during collection
Flue gas, part lead, zinc, indium compound be reduced to simple substance zinc, elementary lead, simple substance indium, be volatized into flue, the quilt in flue
It is reoxidized to be recovered into flue dust in the form of oxide, sulfide, and most of lead, zinc, copper, the oxide of indium can be sent out
Raw chlorination reaction, generates corresponding metal chloride, is volatized into flue, realizes lead, zinc, indium, copper and is separated with iron, wherein
The volatility of lead is 96.40% in dust, and the volatility of zinc is 99.36%, and the volatility of indium is 97.3%, and the volatility of copper is
83.2%, the full Iron grade 43% of metallized pellet obtained after reaction, 67.5%, the metallized pellet of output is passed through degree of metalization
It is 95.32% to cross the full Iron grade of mill ore magnetic selection, and the rate of recovery is 94.22%.
Embodiment 3
The method of this implementation treatment zinc leaching residue is identical with the step of embodiment 1, but technological parameter is different, specific as follows：
Zinc leaching residue composition used and content are：Full iron is 39.72wt%, and Zn content is 19.97wt%, and lead content is
4.94wt%, indium content is 0.25wt%, and copper content is 2.0wt%, and more than 80%, institute are accounted for below particle size reduction to 200 mesh
It is NaCl with chlorinating agent, granularity is between 200 mesh~100 mesh, addition is the 10% of zinc leaching residue, and reducing agent used is smokeless
Coal：Fixed carbon 82.56%, volatile matter 6.49%, ash content 10.02%, moisture 0.93%, sulphur 0.51%, addition is zinc leaching residue
15%, binding agent used be starch solution, addition for zinc leaching residue 6%, four fully mix after carry out pelletizing, it is then defeated
Its chloridising roasting and reduction process are controlled to rotary hearth furnace segmentation and regionalization, chloridising roasting and reduction process are divided into preheating zone and high temperature
Area, wherein, preheating zone temperature setting is 1000 DEG C, 1250 DEG C of high-temperature region, and the total time of reaction is 20min.Produced during collection
Raw flue gas, part lead, zinc, indium compound are reduced to simple substance zinc, elementary lead, simple substance indium, are volatized into flue, in flue
It is reoxidized and is recovered into flue dust in the form of oxide, sulfide, and most of lead, zinc, copper, the oxide meeting of indium
Generation chlorination reaction, generates corresponding metal chloride, is volatized into flue, realizes lead, zinc, indium, copper and is separated with iron, its
The volatility of lead is 98.06% in middle dust, and the volatility of zinc is 97.50%, and the volatility of indium is 97.3%, the volatility of copper
It is 80.2%, the full Iron grade 50.1% of the metallized pellet obtained after reaction, degree of metalization is in 71.1%, the metallization ball of output
Group is 96.83% by the full Iron grade of mill ore magnetic selection, and the rate of recovery is 93.01%.
Embodiment 4
The method of this implementation treatment zinc leaching residue is identical with the step of embodiment 1, but technological parameter is different, specific as follows：
Zinc leaching residue composition used and content are：Full iron is 30.11wt%, and Zn content is 16.17wt%, and lead content is
0.99wt%, indium content is 0.16wt%, and copper content is 0.5wt%, and more than 80%, institute are accounted for below particle size reduction to 200 mesh
It is NaCl with chlorinating agent, granularity is between 200 mesh~100 mesh, addition is the 20% of zinc leaching residue, and reducing agent used is smokeless
Coal：Fixed carbon 82.56%, volatile matter 6.49%, ash content 10.02%, moisture 0.93%, sulphur 0.51%, addition is zinc leaching residue
5%, binding agent used be sodium carboxymethylcellulose, addition for zinc leaching residue 6%, four fully mix after carry out pelletizing,
Then transporting to rotary hearth furnace segmentation and regionalization controls its chloridising roasting and reduction process, chloridising roasting and reduction process to be divided into preheating zone
And high-temperature region, wherein, preheating zone temperature setting is 800 DEG C, 1100 DEG C of high-temperature region, and the total time of reaction is 30min.Collection process
The flue gas of middle generation, part lead, zinc, indium compound are reduced to simple substance zinc, elementary lead, simple substance indium, are volatized into flue, in cigarette
It is reoxidized in road and is recovered into flue dust in the form of oxide, sulfide, and most of lead, zinc, copper, the oxidation of indium
Thing can occur chlorination reaction, generate corresponding metal chloride, be volatized into flue, realize dividing for lead, zinc, indium, copper and iron
From the volatility of lead is 98.06% wherein in dust, and the volatility of zinc is 99.36%, and the volatility of indium is 95.3%, copper
Volatility is 83.2%, the full Iron grade 42% of the metallized pellet obtained after reaction, and degree of metalization is in 65.1%, the metal of output
Pellet is 95.11% by the full Iron grade of mill ore magnetic selection, and the rate of recovery is 97.10%.
In above-described embodiment, chloridising roasting is used in rotary hearth furnace, segmentation and regionalization controlling reaction temperature and reaction time
Method can realize that copper is separated and reclaimed so that the iron powder for finally giving is purer (more than 93%), also realize lead, zinc,
Copper, indium and iron are efficiently separated, and reduce reduction coal consumption, and the temperature of chlorination reaction is relatively low, reduce the heating of rotary hearth furnace
Temperature, realizes energy-saving.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously
The non-restriction to implementation method.For those of ordinary skill in the field, can also do on the basis of the above description
Go out the change or variation of other multi-forms.There is no need and unable to be exhaustive to all of implementation method.And thus drawn
Obvious change that Shen goes out or among changing still in protection scope of the present invention.
Claims (10)
1. it is a kind of process zinc leaching residue method, it is characterised in that including step：
A. mixed pelletizing：After zinc leaching residue is crushed, chlorinating agent, reducing agent and binding agent are added, be well mixed afterwards, then in disk
Pelletizing in pelletizer, the carbonaceous pelletizing obtained after drying；
B. chloridising roasting and reduction：Chloridising roasting, reduction are carried out during carbonaceous pelletizing after drying is delivered into rotary hearth furnace；Obtain metal
Pellet；
C. iron is reclaimed：The metallized pellet is carried out into mill ore magnetic selection, iron is recycled.
2. method according to claim 1, it is characterised in that rotary hearth furnace is divided into preheating zone and high-temperature region, the preheating zone
At 500 DEG C~1000 DEG C, the high-temperature region is 1000 DEG C~1250 DEG C to temperature control.
3. method according to claim 2, it is characterised in that the total time control of chloridising roasting and reduction reaction exists
20-45min。
4. method according to claim 1, it is characterised in that include with the following group according to percentage by weight in the zinc leaching residue
Point：Full iron 30~40wt%, zinc 16-20wt%, 1~5wt% of lead, 0.5~2wt% of copper, indium 0.16-0.25wt%.
5. method according to claim 1, it is characterised in that the chlorinating agent is NaCl or CaCl2。
6. method according to claim 1, it is characterised in that the chlorinating agent is accounted for the percentage by weight of the zinc leaching residue
It is 5wt%~20wt%.
7. method according to claim 1, it is characterised in that reducing agent Task-size Controlling used is in below 1mm.
8. method according to claim 1, it is characterised in that reducing agent addition amount used accounts for the weight hundred of the zinc leaching residue
Divide than being 5wt%~10wt%.
9. method according to claim 1, it is characterised in that the binding agent is organic binder bond, addition accounts for zinc leaching
The percentage by weight of slag is 5wt%~10wt%.
10. method according to claim 9, it is characterised in that the organic binder bond is starch or carboxymethylcellulose calcium
Sodium.
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