CN110983056A - 一种钢铁厂低锌烟尘资源化利用的方法 - Google Patents
一种钢铁厂低锌烟尘资源化利用的方法 Download PDFInfo
- Publication number
- CN110983056A CN110983056A CN201911219655.7A CN201911219655A CN110983056A CN 110983056 A CN110983056 A CN 110983056A CN 201911219655 A CN201911219655 A CN 201911219655A CN 110983056 A CN110983056 A CN 110983056A
- Authority
- CN
- China
- Prior art keywords
- zinc
- iron
- smoke dust
- solution
- leaching
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000011701 zinc Substances 0.000 title claims abstract description 96
- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 93
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 48
- 239000010959 steel Substances 0.000 title claims abstract description 48
- 239000000428 dust Substances 0.000 title claims abstract description 39
- 239000000779 smoke Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000004064 recycling Methods 0.000 title claims abstract description 14
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims abstract description 157
- 229910052742 iron Inorganic materials 0.000 claims abstract description 77
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 56
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 32
- 239000012141 concentrate Substances 0.000 claims abstract description 30
- 238000002386 leaching Methods 0.000 claims abstract description 29
- 239000000463 material Substances 0.000 claims abstract description 26
- 239000002893 slag Substances 0.000 claims abstract description 18
- 239000002699 waste material Substances 0.000 claims abstract description 13
- 239000003792 electrolyte Substances 0.000 claims abstract description 12
- 239000007788 liquid Substances 0.000 claims abstract description 9
- 238000000926 separation method Methods 0.000 claims abstract description 9
- 238000003756 stirring Methods 0.000 claims abstract description 9
- 238000007885 magnetic separation Methods 0.000 claims abstract description 8
- 239000004566 building material Substances 0.000 claims abstract description 6
- 238000002156 mixing Methods 0.000 claims abstract description 6
- 239000002244 precipitate Substances 0.000 claims abstract description 3
- 239000000243 solution Substances 0.000 claims description 43
- 239000011259 mixed solution Substances 0.000 claims description 8
- 235000008733 Citrus aurantifolia Nutrition 0.000 claims description 5
- 235000011941 Tilia x europaea Nutrition 0.000 claims description 5
- 238000001816 cooling Methods 0.000 claims description 5
- 239000004571 lime Substances 0.000 claims description 5
- 239000008267 milk Substances 0.000 claims description 5
- 210000004080 milk Anatomy 0.000 claims description 5
- 235000013336 milk Nutrition 0.000 claims description 5
- 239000007787 solid Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 4
- 230000003472 neutralizing effect Effects 0.000 claims description 2
- 230000001590 oxidative effect Effects 0.000 claims description 2
- 238000001556 precipitation Methods 0.000 claims description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 abstract description 3
- 229910052799 carbon Inorganic materials 0.000 abstract description 3
- 239000000047 product Substances 0.000 abstract description 2
- 229910001308 Zinc ferrite Inorganic materials 0.000 description 7
- WGEATSXPYVGFCC-UHFFFAOYSA-N zinc ferrite Chemical compound O=[Zn].O=[Fe]O[Fe]=O WGEATSXPYVGFCC-UHFFFAOYSA-N 0.000 description 7
- 238000006386 neutralization reaction Methods 0.000 description 6
- 239000000203 mixture Substances 0.000 description 4
- 238000011084 recovery Methods 0.000 description 4
- 238000004070 electrodeposition Methods 0.000 description 3
- 239000000706 filtrate Substances 0.000 description 3
- 230000007062 hydrolysis Effects 0.000 description 3
- 238000006460 hydrolysis reaction Methods 0.000 description 3
- 238000011068 loading method Methods 0.000 description 3
- 230000005415 magnetization Effects 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000003647 oxidation Effects 0.000 description 3
- 238000007254 oxidation reaction Methods 0.000 description 3
- 239000002994 raw material Substances 0.000 description 3
- 238000001238 wet grinding Methods 0.000 description 3
- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 239000003344 environmental pollutant Substances 0.000 description 2
- 239000003500 flue dust Substances 0.000 description 2
- 231100000719 pollutant Toxicity 0.000 description 2
- 239000011819 refractory material Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical class N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 1
- 229910001369 Brass Inorganic materials 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 description 1
- CMHKGULXIWIGBU-UHFFFAOYSA-N [Fe].[Pt] Chemical compound [Fe].[Pt] CMHKGULXIWIGBU-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000003513 alkali Substances 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000010951 brass Substances 0.000 description 1
- 239000003638 chemical reducing agent Substances 0.000 description 1
- 239000000571 coke Substances 0.000 description 1
- 239000013065 commercial product Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000005246 galvanizing Methods 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N iron oxide Inorganic materials [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 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
- SZVJSHCCFOBDDC-UHFFFAOYSA-N iron(II,III) oxide Inorganic materials O=[Fe]O[Fe]O[Fe]=O SZVJSHCCFOBDDC-UHFFFAOYSA-N 0.000 description 1
- 239000011133 lead Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- UOURRHZRLGCVDA-UHFFFAOYSA-D pentazinc;dicarbonate;hexahydroxide Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[Zn+2].[O-]C([O-])=O.[O-]C([O-])=O UOURRHZRLGCVDA-UHFFFAOYSA-D 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000004071 soot Substances 0.000 description 1
- 239000011029 spinel Substances 0.000 description 1
- 229910052596 spinel Inorganic materials 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 239000011667 zinc carbonate Substances 0.000 description 1
- 229910000010 zinc carbonate Inorganic materials 0.000 description 1
- 235000004416 zinc carbonate Nutrition 0.000 description 1
- 239000011787 zinc oxide Substances 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
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B03—SEPARATION OF SOLID MATERIALS USING LIQUIDS OR USING PNEUMATIC TABLES OR JIGS; MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C—MAGNETIC OR ELECTROSTATIC SEPARATION OF SOLID MATERIALS FROM SOLID MATERIALS OR FLUIDS; SEPARATION BY HIGH-VOLTAGE ELECTRIC FIELDS
- B03C1/00—Magnetic separation
- B03C1/02—Magnetic separation acting directly on the substance being separated
-
- 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
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/20—Obtaining zinc otherwise than by distilling
- C22B19/22—Obtaining zinc otherwise than by distilling with leaching with acids
-
- 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
- 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
-
- 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
- C22B7/006—Wet processes
-
- 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
- C22B7/006—Wet processes
- C22B7/007—Wet processes by acid leaching
-
- 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
-
- 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)
- Metallurgy (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Manufacturing & Machinery (AREA)
- Geology (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Environmental & Geological Engineering (AREA)
- Geochemistry & Mineralogy (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Manufacture And Refinement Of Metals (AREA)
Abstract
本发明涉及一种钢铁厂低锌烟尘资源化利用的方法,属于冶金资源综合利用技术领域。本发明将钢铁厂低锌烟尘重选得到铁精矿和富锌物料,铁精矿返回钢铁流程;在温度为40~60℃、搅拌条件下,将富锌物料进行稀硫酸溶液浸出,固液分离得到浸出液和浸出渣;浸出液通过氧化中和沉铁得到铁渣和净化液,净化液电积得到电锌和废电解液,废电解液返回进行富锌物料浸出;将浸出渣和铁渣混合均匀并进行磁化焙烧得到焙砂,焙砂进行磁选分离得到铁精矿和尾渣,铁精矿返回钢铁流程,尾渣用作建筑材料。本发明方法有效回收了低锌烟尘的有价组分锌、铁、碳,并得到产品电锌和铁精矿。
Description
技术领域
本发明涉及一种钢铁厂低锌烟尘资源化利用的方法,属于冶金资源综合利用技术领域。
背景技术
锌是重要的工业原料,广泛用于航天、汽车、船舶、钢铁、机械、建筑、电子等行业。锌具有较好的抗腐蚀性能,在干燥空气或氧气中很稳定,在潮湿空气中形成碱式碳酸锌(ZnCO3·3Zn(OH)2),可进一步保护锌以避免其进一步被腐蚀,锌主要用作于镀锌,约占锌耗量的40%以上;其次锌也用于制造黄铜,约占总锌耗量的20%;其余用于制造锌基合金、干电池、五金用品等。铁精矿是高炉炼铁的原料,焦炭是重要的工业原料,是冶金行业主要的燃料及还原剂。目前,全球都面临着资源短缺,环境污染的严峻问题,实现资源的综合利用就显得至关重要。
随着中国钢铁工业的飞速发展,在炼铁和炼钢的各个环节都会产生大量的烟尘,在大部分烟尘中均有一定量的锌、铁、碳等有价组分。近年来,迫于铁矿资源紧张、污染物排放治理压力,钢铁企业大都采用返回烧结的方法来利用这些烟尘,但由于烟尘中锌、铅、钾、钠等有害元素含量较高,并损害高炉的耐火材料,从而影响高炉正常运行。因此,部分难以被利用的粉尘不得不暂时堆积存放,不但会对环境造成严重污染,还会造成大量宝贵资源的浪费。由此,实现钢铁厂含锌烟尘的高效利用,不仅有利于减少钢铁企业污染物排放,而且可以充分利用其中的有价资源。
钢铁厂烟尘含有大量的的Fe和Zn元素,其中锌主要以氧化锌和铁酸锌(ZnFe2O4 )物相存在,铁主要以磁铁矿(Fe3O4)、赤铁矿(Fe2O3)、浮氏体(FeO)和铁酸锌(ZnFe2O4)的形式存在,但是,由于铁酸锌(ZnFe2O4)是尖晶石型结构,具有相当大的稳定性,常压下,铁酸锌不溶于水、稀酸溶液、碱和氨盐溶液,一般处理方法难以对其处理。正因为如此,造成钢铁厂含铁酸锌粉尘大量堆积,无法实现综合利用。所以,开展针对含铁酸锌(ZnFe2O4)的低锌烟尘综合利用研究显得尤为重要。
发明内容
本发明针对现有技术中钢铁厂低锌烟尘回收率低、污染大等问题,提供一种钢铁厂低锌烟尘资源化利用的方法,本发明方法综合回收了钢铁厂低锌烟尘中的主要有价成分,实现了低锌烟尘处理过程的低成本、低能耗,低污染,高效率。
一种钢铁厂低锌烟尘资源化利用的方法,具体步骤如下:
(1)将钢铁厂低锌烟尘重选得到铁精矿和富锌物料,铁精矿返回钢铁流程;
(2)在温度为40~60℃、搅拌条件下,将步骤(1)富锌物料进行稀硫酸溶液浸出,固液分离得到浸出液和浸出渣;浸出液通过氧化中和沉铁得到铁渣和净化液,净化液电积得到电锌和废电解液,废电解液返回进行富锌物料浸出;
(3)将步骤(2)浸出渣和铁渣混合均匀并进行磁化焙烧得到焙砂,焙砂进行磁选分离得到铁精矿和尾渣,铁精矿返回钢铁流程,尾渣用作建筑材料。
所述步骤(2)稀硫酸溶液的质量浓度为15%~20%,稀硫酸溶液与富锌物料的液固比mL:g为3~5:1。
所述步骤(2)浸出液氧化中和沉铁的方法为在浸出液中加入H2O2溶液得到混合溶液,将混合溶液加热至温度为60~80℃,逐滴加入石灰乳调节体系pH值为5.2~5.4,静置冷却至室温。
进一步地,所述浸出液与H2O2溶液的体积比为50~40:1,H2O2溶液为市售产品;
进一步地,所述磁化焙烧的温度为800~900℃。
所述步骤(3)磁选的磁场强度为150~250mT。
本发明的有益效果是:
(1)本发明实现了低锌烟尘中锌的提取及铁、碳协同利用,解决了钢铁厂低锌烟尘资源化利用困难的问题;
(2)本发明减少了低锌烟尘对环境的污染,避免了低锌烟尘返高炉造成耐火材料受损的问题,并且工艺处理过程能耗低,设备投资少,生产成本低,具有良好的经济效益。
附图说明
图1是本发明工艺流程图。
具体实施方式
下面结合具体实施方式对本发明作进一步详细说明,但本发明的保护范围并不限于所述内容。
实施例1:本实施例选取四川某钢铁厂低锌烟尘,低锌烟尘中Zn含量为5.23%、TFe含量为45.69%、C含量为14.24%(见表1);
表1 四川某钢铁厂低锌烟尘主要成分分析
一种钢铁厂低锌烟尘资源化利用的方法(见图1),具体步骤如下:
(1)将钢铁厂低锌烟尘常规重选得到铁精矿和富锌物料,富锌物料中Zn13.5%,Fe25.8%,铁精矿中Fe 52.6%,Zn1.8%,铁精矿返回钢铁流程;
(2)将步骤(1)富锌物料装入浸出槽中,在温度为50℃、搅拌速率为200r/min条件下,进行稀硫酸溶液浸出,其中稀硫酸溶液的质量浓度为16%,稀硫酸溶液与富锌物料的液固比mL:g为3:1;固液分离得到浸出液和浸出渣;浸出液倒入中和槽中,在搅拌条件下加入H2O2溶液将滤液中的Fe2+氧化为Fe3+得到混合溶液,其中浸出液与H2O2溶液的体积比为50:1;将混合溶液加热至温度为60℃,逐滴加入石灰乳调节体系pH值为5.2~5.4中和水解除铁,静置冷却至室温,固液分离得到铁渣和净化液,净化液加入到电解槽进行常规电积得到电锌和废电解液,锌的直收率约为87%,电锌的锌含量为99.95%;废电解液返回进行富锌物料浸出;
(3)将步骤(2)浸出渣和铁渣混合均匀加入到还原焙烧炉内,在温度为850℃条件下进行磁化焙烧1h得到焙砂,焙砂在磨矿机上湿磨10min,焙砂在磁场强度为150mT下进行磁选分离得到铁精矿和尾渣,铁精矿品位为55%,铁的回收率为72%,铁精矿返回钢铁流程,尾渣用作建筑材料。
实施例2:本实施例选取云南某钢铁厂的低锌烟尘,低锌烟尘中Zn含量为4.89 %、TFe含量为48.26 %、C含量为17.97 %(见表2);
表2 云南某钢铁厂低锌烟尘主要成分分析
一种钢铁厂低锌烟尘资源化利用的方法(见图1),具体步骤如下:
(1)将钢铁厂低锌烟尘常规重选得到铁精矿和富锌物料,富锌物料中Zn12.1%,Fe28.3%,铁精矿中Fe 50.9%,Zn1.4%,铁精矿返回钢铁流程;
(2)将步骤(1)富锌物料装入浸出槽中,在温度为55℃、搅拌速率为200r/min条件下,进行稀硫酸溶液浸出,其中稀硫酸溶液的质量浓度为18%,稀硫酸溶液与富锌物料的液固比mL:g为4:1;固液分离得到浸出液和浸出渣;浸出液倒入中和槽中,在搅拌条件下加入H2O2溶液将滤液中的Fe2+氧化为Fe3+得到混合溶液,其中浸出液与H2O2溶液的体积比为45:1;将混合溶液加热至温度为65℃,逐滴加入石灰乳调节体系pH值为5.2~5.4中和水解除铁,静置冷却至室温,固液分离得到铁渣和净化液,净化液加入到电解槽进行常规电积得到电锌和废电解液,锌的直收率约为88%,电锌的锌含量为99.93%;废电解液返回进行富锌物料浸出;
(3)将步骤(2)浸出渣和铁渣混合均匀加入到还原焙烧炉内,在温度为800℃条件下进行磁化焙烧1h得到焙砂,焙砂在磨矿机上湿磨10min,焙砂在磁场强度为200mT下进行磁选分离得到铁精矿和尾渣,铁精矿品位为54%,铁的回收率为75%,铁精矿返回钢铁流程,尾渣用作建筑材料。
实施例3:本实施例贵州某钢铁厂的低锌烟尘,低锌烟尘中Zn含量为6.23%、TFe含量为47.87 %、C含量为21.39 %(见表3);
表3 贵州某钢铁厂低锌烟尘主要成分分析
一种钢铁厂低锌烟尘资源化利用的方法(见图1),具体步骤如下:
(1)将钢铁厂低锌烟尘常规重选得到铁精矿和富锌物料,富锌物料中Zn11.5%,Fe23.2%,铁精矿中Fe 55%,Zn1.1%,铁精矿返回钢铁流程;
(2)将步骤(1)富锌物料装入浸出槽中,在温度为45℃、搅拌速率为200r/min条件下,进行稀硫酸溶液浸出,其中稀硫酸溶液的质量浓度为20%,稀硫酸溶液与富锌物料的液固比mL:g为5:1;固液分离得到浸出液和浸出渣;浸出液倒入中和槽中,在搅拌条件下加入H2O2溶液将滤液中的Fe2+氧化为Fe3+得到混合溶液,其中浸出液与H2O2溶液的体积比为50:1;将混合溶液加热至温度为70℃,逐滴加入石灰乳调节体系pH值为5.2~5.4中和水解除铁,静置冷却至室温,固液分离得到铁渣和净化液,净化液加入到电解槽进行常规电积得到电锌和废电解液,锌的直收率约为90%,电锌的锌含量为99.96%;废电解液返回进行富锌物料浸出;
(3)将步骤(2)浸出渣和铁渣混合均匀加入到还原焙烧炉内,在温度为900℃条件下进行磁化焙烧1h得到焙砂,焙砂在磨矿机上湿磨10min,焙砂在磁场强度为250mT下进行磁选分离得到铁精矿和尾渣,铁精矿品位为52%,铁的回收率为74%,铁精矿返回钢铁流程,尾渣用作建筑材料。
Claims (5)
1.一种钢铁厂低锌烟尘资源化利用的方法,其特征在于,具体步骤如下:
(1)将钢铁厂低锌烟尘重选得到铁精矿和富锌物料,铁精矿返回钢铁流程;
(2)在温度为40~60℃、搅拌条件下,将步骤(1)富锌物料进行稀硫酸溶液浸出,固液分离得到浸出液和浸出渣;浸出液通过氧化中和沉铁得到铁渣和净化液,净化液电积得到电锌和废电解液,废电解液返回进行富锌物料浸出;
(3)将步骤(2)浸出渣和铁渣混合均匀并进行磁化焙烧得到焙砂,焙砂进行磁选分离得到铁精矿和尾渣,铁精矿返回钢铁流程,尾渣用作建筑材料。
2.根据权利要求1所述钢铁厂低锌烟尘资源化利用的方法,其特征在于:步骤(2)稀硫酸溶液的质量浓度为15%~20%,稀硫酸溶液与富锌物料的液固比mL:g为3~5:1。
3.根据权利要求1所述钢铁厂低锌烟尘资源化利用的方法,其特征在于:步骤(2)浸出液氧化中和沉铁的方法为在浸出液中加入H2O2溶液得到混合溶液,将混合溶液加热至温度为60~80℃,逐滴加入石灰乳调节体系pH值为5.2~5.4,静置冷却至室温。
4.根据权利要求3所述钢铁厂低锌烟尘资源化利用的方法,其特征在于:浸出液与H2O2溶液的体积比为50~40:1。
5.根据权利要求1所述钢铁厂低锌烟尘资源化利用的方法,其特征在于:步骤(3)磁选的磁场强度为150~250mT。
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911219655.7A CN110983056A (zh) | 2019-12-03 | 2019-12-03 | 一种钢铁厂低锌烟尘资源化利用的方法 |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201911219655.7A CN110983056A (zh) | 2019-12-03 | 2019-12-03 | 一种钢铁厂低锌烟尘资源化利用的方法 |
Publications (1)
Publication Number | Publication Date |
---|---|
CN110983056A true CN110983056A (zh) | 2020-04-10 |
Family
ID=70089664
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CN201911219655.7A Pending CN110983056A (zh) | 2019-12-03 | 2019-12-03 | 一种钢铁厂低锌烟尘资源化利用的方法 |
Country Status (1)
Country | Link |
---|---|
CN (1) | CN110983056A (zh) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1148035A (zh) * | 1996-08-19 | 1997-04-23 | 张伟晒 | 铁矿尾矿渣的回收方法 |
CN1908207A (zh) * | 2006-08-18 | 2007-02-07 | 昆明理工大学 | 一种炼铁高炉炉尘资源综合利用的方法 |
CN107586962A (zh) * | 2017-08-25 | 2018-01-16 | 鞍钢股份有限公司 | 一种含锌除尘灰再利用方法 |
-
2019
- 2019-12-03 CN CN201911219655.7A patent/CN110983056A/zh active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN1148035A (zh) * | 1996-08-19 | 1997-04-23 | 张伟晒 | 铁矿尾矿渣的回收方法 |
CN1908207A (zh) * | 2006-08-18 | 2007-02-07 | 昆明理工大学 | 一种炼铁高炉炉尘资源综合利用的方法 |
CN107586962A (zh) * | 2017-08-25 | 2018-01-16 | 鞍钢股份有限公司 | 一种含锌除尘灰再利用方法 |
Non-Patent Citations (1)
Title |
---|
陈任华: "《危险废物环境管理与安全处理及污染控制标准实务全书》", 31 March 2004, 吉林电子出版社 * |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
CN102747226B (zh) | 碱铵硫耦合法处理湿法炼锌废渣的方法 | |
CN101225468B (zh) | 磁化氯化法从酸化焙烧烧渣中回收金、银、铁和铅的方法 | |
CN102051491B (zh) | 一种黄铁矿包裹型金矿富集金的方法 | |
CN102719675B (zh) | 一种从锌冶炼废渣中综合回收锌铅银的方法 | |
CN104313328B (zh) | 基于难处理金矿与含铅废渣原料还原固硫熔池熔炼回收铅和金的方法 | |
CN108315559B (zh) | 一种钢铁厂含锌尘泥分离锌的方法 | |
CN104911356A (zh) | 一种固废瓦斯灰、含锌铁钒渣综合回收工艺 | |
CN101255502A (zh) | 铅系统烟灰综合回收铟、镉、铊、锌工艺 | |
CN102134655A (zh) | 一种富铟高铁锌焙砂还原磁选分离锌铟铁的方法 | |
CN102517439B (zh) | 选择性焙烧分离含锡锌砷复合铁矿中锡、锌、砷的方法 | |
CN111647754A (zh) | 一种钢铁厂含锌尘泥的综合利用方法 | |
CN101063181A (zh) | 一种用转底炉快速还原含碳含金黄铁矿烧渣球团富集金及联产铁粉的方法 | |
CN103194602A (zh) | 一种湿法冶锌工艺除铁并回收富含铁铁渣的方法 | |
CN105543479A (zh) | 一种铋冰铜的综合回收方法 | |
CN102399997A (zh) | 一种选冶联合炼锌的方法 | |
CN103074496B (zh) | 一种从阳极泥中分离提纯二氧化锰的方法 | |
CN107287451A (zh) | 一种钒渣的铬化氧化焙烧‑酸浸提钒方法 | |
CN102031362B (zh) | 一种高铁硫化锌精矿分离铁锌的方法 | |
CN102899491B (zh) | 一种浮选分离硫酸锌浸出液中高浓度铁离子的方法 | |
CN103627905A (zh) | 高酸浸出湿法炼锌除铁渣及高炉烟灰综合回收利用工艺 | |
CN106119557A (zh) | 一种高炉瓦斯泥中锌、铁、碳综合回收的方法 | |
CN109879323A (zh) | 一种利用电炉粉尘和轧钢皮制备铁氧体的方法 | |
CN206828611U (zh) | 处理提钒尾渣的系统 | |
CN105238893A (zh) | 一种含钒固废配矿烧结-高炉炼铁的方法 | |
CN106957963A (zh) | 处理提钒尾渣的方法和系统 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PB01 | Publication | ||
PB01 | Publication | ||
SE01 | Entry into force of request for substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20200410 |
|
RJ01 | Rejection of invention patent application after publication |