CN110585865A - 利用湿法炼锌含铁沉淀渣处理锌冶炼二氧化硫烟气的方法 - Google Patents
利用湿法炼锌含铁沉淀渣处理锌冶炼二氧化硫烟气的方法 Download PDFInfo
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- 229910052725 zinc Inorganic materials 0.000 title claims abstract description 139
- 239000011701 zinc Substances 0.000 title claims abstract description 139
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 title claims abstract description 137
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title claims abstract description 136
- 229910052742 iron Inorganic materials 0.000 title claims abstract description 70
- RAHZWNYVWXNFOC-UHFFFAOYSA-N Sulphur dioxide Chemical compound O=S=O RAHZWNYVWXNFOC-UHFFFAOYSA-N 0.000 title claims abstract description 63
- 239000002893 slag Substances 0.000 title claims abstract description 59
- 238000000034 method Methods 0.000 title claims abstract description 55
- 239000003546 flue gas Substances 0.000 title claims abstract description 54
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 50
- 238000003723 Smelting Methods 0.000 title claims abstract description 47
- 238000009854 hydrometallurgy Methods 0.000 title claims abstract description 41
- 238000001556 precipitation Methods 0.000 title claims abstract description 31
- 238000006477 desulfuration reaction Methods 0.000 claims abstract description 43
- 230000023556 desulfurization Effects 0.000 claims abstract description 43
- 239000002002 slurry Substances 0.000 claims abstract description 43
- 238000002386 leaching Methods 0.000 claims abstract description 36
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 16
- 239000000779 smoke Substances 0.000 claims abstract description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 230000003009 desulfurizing effect Effects 0.000 claims abstract description 5
- 238000007254 oxidation reaction Methods 0.000 claims abstract description 4
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- 238000006243 chemical reaction Methods 0.000 claims description 29
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- MHAJPDPJQMAIIY-UHFFFAOYSA-N Hydrogen peroxide Chemical compound OO MHAJPDPJQMAIIY-UHFFFAOYSA-N 0.000 claims description 14
- 238000007599 discharging Methods 0.000 claims description 13
- 239000002253 acid Substances 0.000 claims description 8
- 238000001914 filtration Methods 0.000 claims description 8
- 238000004064 recycling Methods 0.000 claims description 8
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 6
- 229910052760 oxygen Inorganic materials 0.000 claims description 6
- 239000001301 oxygen Substances 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 3
- 239000003795 chemical substances by application Substances 0.000 claims description 3
- 238000009853 pyrometallurgy Methods 0.000 claims description 3
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- 229910000360 iron(III) sulfate Inorganic materials 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 9
- RUTXIHLAWFEWGM-UHFFFAOYSA-H iron(3+) sulfate Chemical compound [Fe+3].[Fe+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O RUTXIHLAWFEWGM-UHFFFAOYSA-H 0.000 abstract description 6
- 238000005086 pumping Methods 0.000 abstract description 5
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- XLOMVQKBTHCTTD-UHFFFAOYSA-N Zinc monoxide Chemical compound [Zn]=O XLOMVQKBTHCTTD-UHFFFAOYSA-N 0.000 description 14
- 238000000151 deposition Methods 0.000 description 7
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- 229910052802 copper Inorganic materials 0.000 description 5
- 239000010949 copper Substances 0.000 description 5
- 229910052710 silicon Inorganic materials 0.000 description 5
- NWONKYPBYAMBJT-UHFFFAOYSA-L zinc sulfate Chemical compound [Zn+2].[O-]S([O-])(=O)=O NWONKYPBYAMBJT-UHFFFAOYSA-L 0.000 description 5
- 229960001763 zinc sulfate Drugs 0.000 description 5
- 229910000368 zinc sulfate Inorganic materials 0.000 description 5
- UQSXHKLRYXJYBZ-UHFFFAOYSA-N Iron oxide Chemical compound [Fe]=O UQSXHKLRYXJYBZ-UHFFFAOYSA-N 0.000 description 4
- 229910052785 arsenic Inorganic materials 0.000 description 4
- 229910052598 goethite Inorganic materials 0.000 description 4
- AEIXRCIKZIZYPM-UHFFFAOYSA-M hydroxy(oxo)iron Chemical compound [O][Fe]O AEIXRCIKZIZYPM-UHFFFAOYSA-M 0.000 description 4
- 239000002184 metal Substances 0.000 description 4
- 229910052751 metal Inorganic materials 0.000 description 4
- 238000002360 preparation method Methods 0.000 description 4
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- 229910000831 Steel Inorganic materials 0.000 description 3
- FMRLDPWIRHBCCC-UHFFFAOYSA-L Zinc carbonate Chemical compound [Zn+2].[O-]C([O-])=O FMRLDPWIRHBCCC-UHFFFAOYSA-L 0.000 description 3
- 238000007664 blowing Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
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- 239000010959 steel Substances 0.000 description 3
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- 239000011667 zinc carbonate Substances 0.000 description 3
- 235000004416 zinc carbonate Nutrition 0.000 description 3
- 229910000010 zinc carbonate Inorganic materials 0.000 description 3
- 230000008021 deposition Effects 0.000 description 2
- 238000005265 energy consumption Methods 0.000 description 2
- XLYOFNOQVPJJNP-ZSJDYOACSA-N heavy water Substances [2H]O[2H] XLYOFNOQVPJJNP-ZSJDYOACSA-N 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- JPVYNHNXODAKFH-UHFFFAOYSA-N Cu2+ Chemical compound [Cu+2] JPVYNHNXODAKFH-UHFFFAOYSA-N 0.000 description 1
- CWYNVVGOOAEACU-UHFFFAOYSA-N Fe2+ Chemical compound [Fe+2] CWYNVVGOOAEACU-UHFFFAOYSA-N 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
- 235000019738 Limestone Nutrition 0.000 description 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 1
- PTFCDOFLOPIGGS-UHFFFAOYSA-N Zinc dication Chemical compound [Zn+2] PTFCDOFLOPIGGS-UHFFFAOYSA-N 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 239000011575 calcium Substances 0.000 description 1
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- 229910001431 copper ion Inorganic materials 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
- 239000010419 fine particle Substances 0.000 description 1
- 229910052602 gypsum Inorganic materials 0.000 description 1
- 239000010440 gypsum Substances 0.000 description 1
- 229910052595 hematite Inorganic materials 0.000 description 1
- 239000011019 hematite Substances 0.000 description 1
- 238000001027 hydrothermal synthesis Methods 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 229910052500 inorganic mineral Inorganic materials 0.000 description 1
- -1 iron ions Chemical class 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
- 229910052935 jarosite Inorganic materials 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- 239000000047 product Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 229910052709 silver Inorganic materials 0.000 description 1
- 239000004332 silver Substances 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052717 sulfur Inorganic materials 0.000 description 1
- 239000011593 sulfur Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/46—Removing components of defined structure
- B01D53/48—Sulfur compounds
- B01D53/50—Sulfur oxides
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- B01D53/34—Chemical or biological purification of waste gases
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B1/00—Preliminary treatment of ores or scrap
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- C22B—PRODUCTION AND REFINING OF METALS; PRETREATMENT OF RAW MATERIALS
- C22B13/00—Obtaining lead
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- C22B19/20—Obtaining zinc otherwise than by distilling
- C22B19/22—Obtaining zinc otherwise than by distilling with leaching with acids
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Abstract
本发明涉及一种利用湿法炼锌含铁沉淀渣处理锌冶炼二氧化硫烟气的方法,该方法首先将含铁沉淀渣与水混合配制成浆液,然后将此浆液作为脱硫浆液泵入脱硫塔,通过液相催化氧化作用脱除烟气中二氧化硫,二氧化硫转化为硫酸,高效浸出烟尘和含铁渣中锌,脱硫后浆液经过固液分离,得到酸性硫酸铁溶液和脱硫渣,酸性硫酸铁溶液回流至湿法炼锌浸出工艺用于浸锌,随后硫酸铁经锌焙砂中和沉淀形成含铁沉淀渣,可循环用于烟气脱硫,脱硫后渣经干燥后可返回原回转炉窑回收锌、铅。与现有技术相比,本发明具有资源高效利用、流程简单、经济环保等特点。
Description
技术领域
本发明涉及一种有色金属湿法炼锌含铁沉淀渣的资源化烟气脱硫方法,属于固废资源化利用与烟气脱硫领域。
背景技术
金属锌及锌化工产品在国民经济各领域占有极其重要的地位。我国是锌资源大国,锌金属生产量已于20世纪90年代上升为世界首位;根据矿物中锌状态,锌冶炼可分为火法炼锌、湿法炼锌,其中湿法炼锌是获得硫酸锌、电解锌的重要途径。
锌火法焙烧过程中会产生大量低浓度SO2烟气,其主要通过钙基湿法脱硫,但会产生大量硫石膏、处理难度大。近些年来,以资源化副产物为特点的新型湿法脱硫在锌冶炼行业逐渐受到广泛关注。中国专利(CN201410480621.4)采用双氧水作为脱硫剂,当滤液中稀硫酸达到一定浓度时用于生产硫酸锌或电锌,该发明投资较少,但需消耗大量双氧水。中国专利(CN201811345230.6)提出乳化氧化锌用于烟气脱硫并制备硫酸锌的方法,采用锌冶炼氧化锌烟尘、双氧水配浆,实现资源最大化利用,但脱硫过程中吸收乳液黏度大,能耗高。
此外,湿法炼锌过程中常采用中性浸出--酸性浸出两段浸出工艺,酸性浸出过程中产生含铁硫酸锌液体。含铁硫酸锌中除铁方法主要包括黄钠铁矾法、针铁矿法、赤铁矿法。针铁矿法因具有沉铁效率高、过滤性能良好、稀散金属分布集中等优点在锌湿法冶炼除铁过程备受关注,平均每吨锌焙烧矿约产生180-220 kg含铁渣,渣中约含铁37%、锌12%、铅2.4%。该含铁渣中锌含量高,目前针对湿法炼锌过程含铁渣的资源化回收方法主要为火法,将锌全部挥发成含锌烟气进一步回收,但总体渣量大,回收锌后的渣资源化回收难度大。
湿法火法联合工艺回收湿法炼锌沉铁渣中有价元素是一种潜在的发展方向,中国专利(CN201910036663.1)提出利用湿法炼锌针铁矿法沉铁渣制备铁红的方法,采用稀硫酸高温浸出针铁矿渣,浸出液返回湿法炼锌主系统,浸出渣采用浮选-高温水热反应回收渣中铅、银并得到微细粒铁红原料,但该方法需要消耗大量稀硫酸,设备适用性弱。
发明内容
针对现有脱硫技术的问题,结合湿法炼锌行业的特点及固废资源化利用方向,发明提供了一种利用湿法炼锌含铁沉淀渣脱除锌冶炼烟气中二氧化硫的方法;该方法能高效回收烟尘和含铁渣中锌资源,本方法先将含铁沉淀渣与水混合配制成浆液,然后将此浆液加入烟气脱硫塔中对烟气进行脱硫处理,基于液相催化氧化反应,脱硫后浆液经过固液分离,得到酸性硫酸铁溶液与反应后渣,酸性硫酸铁溶液回流至湿法炼锌浸出工艺,用于浸锌、沉铁,其中硫酸铁经锌焙砂中和沉淀形成含铁沉淀渣,可循环用于烟气脱硫,脱硫后渣经干燥后可返回原回转炉窑回收锌、铅。该法具有资源高效利用、流程简单、经济环保等特点。
本发明通过以下技术方案实现:
(1)将湿法炼锌含铁沉淀渣与水混合,制得脱硫吸收浆液;
所述湿法炼锌含铁沉淀渣与水的质量体积比g:mL为1:3-1:10;
所述湿法炼锌含铁沉淀渣中主要元素为铁35-40%、锌6-12%、铅2-3%、硅0.6-4%、铜0.1-0.4%;
(2)将步骤(1)脱硫吸收浆液和锌冶炼二氧化硫烟气引入脱硫塔,脱硫吸收浆液吸收锌冶炼二氧化硫烟气中二氧化硫,反应后气体达标排放;
所述锌冶炼二氧化硫烟气中SO2浓度为500-10000mg/m3,O2含量为8-20%,烟气温度为40-90 ℃;根据入口SO2浓度,脱硫塔可以采用一级或多级;
(3)当排出烟气中SO2浓度超过50-100mg/m3时,将步骤(2)反应所得浆料移出,过滤;
(4)将步骤(3)所得滤液引入锌湿法冶炼系统酸性浸出步骤中,滤液与稀硫酸浸出液体积比为1:5-1:10,滤液中残余稀硫酸用于浸出,反应后浆液缓慢引入沉铁步骤,鼓入压缩空气、氧气或添加双氧水进行氧化,添加锌焙砂或碱作为中和剂,调节pH为3.5-7,继续反应0.5-3h沉铁,过滤,所得滤液进入锌冶炼浆化槽回收,滤渣返回步骤(1)用于配制脱硫吸收浆液;
所述每立方米反应溶液鼓入压缩空气或氧气的量为2-5m3/h;
所述双氧水添加量为每立方米反应溶液添加2-10L;
所述碱为石灰石、碳酸锌等。
(5)步骤(3)所得滤渣进入火法炼锌回转窑工艺,进一步回收渣中锌、铅。
本发明烟气脱硫过程涉及到的具体化学反应式如下:
ZnO+H2O+2.5SO2=ZnSO3·2.5H2O
2ZnSO3·2.5H2O+O2=2ZnSO4+3H2O
2SO2+O2+2H2O2H2SO4
2FeOOH+3H2SO4=Fe2(SO4)3+4H2O
2Fe(OH)3+3H2SO4=Fe2(SO4)3+6H2O
Fe2(SO4)3+SO2+2H2O=2FeSO4+2H2SO4
2FeSO4+SO2+O2=Fe2(SO4)3
反应后通过分离浆液得到浸出渣和浸出液,浸出液含有较多的铁、锌、铜离子,引入锌湿法冶炼系统资源化利用,浸出渣中未反应的铅、锌等,通过火法挥发回转窑系统回收铅、锌。
本发明的优点与效果为:
(1)此法以湿法炼锌沉铁渣作为烟气脱硫剂,实现了锌冶炼固废的资源化和减量化利用;
(2)本发明依托厂内现有设备,便于改造,在实现烟气高效脱硫的同时,浸出烟尘和沉铁渣中可溶性锌;
(3)利用湿法炼锌沉铁渣作为脱硫剂,一定程度降低了火法分离沉铁渣中锌、铅能耗与负荷;
(4)本发明解决了传统湿法脱硫后脱硫渣处置问题,清洁环保。
附图说明
图1为本发明的工艺流程示意图。
具体实施方式
下面结合附图和具体实施例对本发明做出进一步详细说明,但本发明保护范围不仅限于以下实施方式。
实施例1:本实施例以1% SO2钢瓶气,纯度为95% N2钢瓶气,空气泵抽气通过质量流量计精准配制成模拟锌冶炼回转炉窑烟气,其中气体总流量为1200mL/min,O2体积浓度为16.5%,SO2浓度为1000 mg/m3,烟气温度为55℃;湿法炼锌含铁沉淀渣来自云南某锌业公司,湿法炼锌沉铁渣主要组分以质量百分数计如下:Fe 36.10%、Zn 7.6%、Pb2.5%、Si 0.8%、K0.28%、Cu 0.15%、As 0.28%。
利用湿法炼锌含铁沉淀渣处理锌冶炼二氧化硫烟气的方法,具体步骤如下:
(1)以一个体积为250mL的鼓泡吸收瓶作为烟气脱硫装置,在吸收瓶内添加10.0g湿法炼锌含铁沉淀渣和100 mL水,磁力搅拌5min混匀;
(2)将模拟锌冶炼回转炉窑烟气通入鼓泡反应器,吸收温度为30℃,反应后气体达标排出;
(3)当出口SO2浓度达到50mg/m3时,停止反应,浆料排出,过滤;
(4)将步骤(3)所得滤液缓慢移入含500mL锌矿酸性浸出的装置中,浸出完成后浆液缓慢引入沉铁工段,按每立方米反应溶液中2m3/h的流量鼓入氧气,并向浸出液中加入锌焙砂30g调节浆液pH至3.5,继续反应30min,抽滤,滤液回收引入锌冶炼浆化槽回收,滤渣返回步骤(1)用于配制脱硫吸收浆液;
(5)将步骤(3)所得滤渣引入火法炼锌回转窑装置,在1300℃下回收锌、铅;
经本过程,反应40h时,出口烟气SO2达50mg/m3,脱硫效率维持高达95%,脱硫过程湿法炼锌含铁沉淀渣中氧化锌浸出率为80%,铁浸出率为60%,含铁渣减量20%。
实施例2:本实施例以1% SO2钢瓶气,纯度为95% N2钢瓶气,空气泵抽气通过质量流量计精准配制成模拟锌冶炼回转炉窑烟气,其中气体总流量为1200mL/min,O2体积浓度为14%,SO2浓度为8000 mg/m3,烟气温度为65℃;湿法炼锌沉铁渣来自云南某锌业公司,湿法炼锌沉铁渣主要组分以质量百分数计如下:Fe 35.80%、Zn 9.4%、Pb2.2%、Si 0.6%、K0.38%、Cu 0.17%、As 0.32%。
利用湿法炼锌含铁沉淀渣处理锌冶炼二氧化硫烟气的方法,具体步骤如下:
(1)以一个体积为250mL的鼓泡吸收瓶作为烟气脱硫装置,在吸收瓶内添加30g含铁渣和100mL水,磁力搅拌5min混匀;
(2)将模拟锌冶炼回转炉窑烟气通入鼓泡反应器,吸收温度为25℃,反应后气体排出;
(3)当出口SO2浓度达到100 mg/m3时,停止反应,浆料排出,过滤;
(4)将步骤(3)所得滤液缓慢移入含800mL锌矿酸性浸出的装置中,浸出完成后浆液缓慢引入沉铁工段,按每立方米反应溶液添加8mL的比例加入双氧水,并向浸出液中加入锌焙砂40g调节浆液pH至7,加入完全后继续反应1h,抽滤,滤液回收引入锌冶炼浆化槽回收,滤渣返回配浆步骤循环用于配制脱硫吸收液;
(5)将步骤(3)所得滤渣引入火法炼锌回转窑装置,在1200℃下回收锌、铅。
经本过程,反应10h时,出口烟气SO2达100mg/m3,脱硫效率维持高达98.75%,脱硫过程沉铁渣中氧化锌浸出率为70%,铁浸出率为45%,含铁渣减量12%。
实施例3:本实施例以1% SO2钢瓶气,纯度为95% N2钢瓶气,空气泵抽气通过质量流量计精准配制成模拟锌冶炼回转炉窑烟气,其中气体总流量为1200mL/min,O2体积浓度为10%,SO2浓度为10000 mg/m3,烟气温度为80℃;采用湿法炼锌沉铁渣来自云南某锌业公司,湿法炼锌沉铁渣主要组分以质量百分数计如下:Fe 36.10%、Zn 9.4%、Pb2.5%、Si 1.8%、K 0.28%、Cu 0.16%、As 0.28%。
利用湿法炼锌含铁沉淀渣处理锌冶炼二氧化硫烟气的方法,具体步骤如下:
(1)以两个体积为250 mL的鼓泡吸收瓶作为烟气脱硫装置,在每个吸收瓶内添加20g含铁渣和100 mL水,磁力搅拌5 min混匀;
(2)将模拟锌冶炼回转炉窑烟气通入鼓泡反应器,吸收温度约为35℃,反应后气体排出;
(3)当出口SO2浓度达到80mg/m3时,停止反应,浆料排出,过滤;
(4)将步骤(3)所得一级脱硫滤液缓慢移入含1000mL锌矿酸性浸出的装置中,浸出完成后浆液缓慢引入沉铁工段,按每立方米反应溶液中5m3/h的流量鼓入压缩空气,并向浸出液中加入碳酸锌30g调节浆液pH至4.5,加入完全后继续反应2h,抽滤,滤液回收引入锌冶炼浆化槽回收,滤渣返回配浆步骤循环用于配制脱硫吸收液;
(5)将步骤(3)所得滤渣引入火法炼锌回转窑装置,在1200℃下回收锌、铅;
经本过程,反应24h时,出口烟气SO2达80mg/m3,总脱硫效率维持高达99.2%,脱硫过程沉铁渣中氧化锌浸出率为90%,铁浸出率为55%,含铁渣减量15%。
实施例4:本实施例烟气引至湖南某锌冶炼回转炉窑烟气,其中气体总流量为1500 m3/h,O2体积浓度约为16%,SO2浓度约为4500 mg/m3,烟气温度约为65℃;采用湿法炼锌沉铁渣来自该锌业公司,湿法炼锌沉铁渣主要组分以质量百分数计如下:Fe 35.75%、Zn11.2%、Pb1.9%、Si 3.9%、K 0.31%、Cu 0.38%、As 0.26%。
如图1所示,利用湿法炼锌含铁沉淀渣脱除锌锌冶炼烟气中二氧化硫的方法,具体步骤如下:
(1)在一个容积为8m3的配浆槽内添加450kg沉铁渣和1.6m3工业用水,机械搅拌25min;配好了浆液,引到循环槽;
(2)将锌冶炼回转炉窑烟气通入烟气脱硫塔,浆液从循环槽由泵按照液气比10L/m3泵入,吸收温度约为40℃,反应后气体排出;
(3)当出口SO2浓度达到100mg/m3时,循环槽中浆液排出,过滤;
(4)将步骤(3)所得滤液缓慢移入6m3锌矿酸性浸出的装置中,浸出完成后浆液缓慢引入沉铁工段的装置中,按每立方米反应溶液中12m3/h的流量鼓入氧气,并向浸出液中加入锌焙砂540kg调节浆液pH至5,加入完全后继续反应3h,过滤,滤液回收引入锌冶炼浆化槽回收,滤渣返回配浆步骤循环用于配制脱硫吸收液;
(5)将步骤(3)所得滤渣引入火法炼锌回转窑装置,在1200℃下回收锌、铅。
经本过程,反应12h时,出口烟气SO2达100mg/m3,脱硫效率维持高达97.77%,脱硫过程沉铁渣中氧化锌浸出率为65%,铁浸出率为50%,含铁渣减量16%。
Claims (6)
1.一种利用湿法炼锌含铁沉淀渣处理锌冶炼二氧化硫烟气的方法,其特征在于,步骤如下:
(1)将湿法炼锌含铁沉淀渣与水混合,制得脱硫吸收浆液;
(2)将步骤(1)脱硫吸收浆液和锌冶炼二氧化硫烟气引入脱硫塔,脱硫吸收浆液吸收锌冶炼二氧化硫烟气中二氧化硫,反应后气体达标排放;
(3)当排出烟气中SO2浓度超过50-100mg/m3时,将步骤(2)反应所得浆料移出,过滤;
(4)将步骤(3)所得滤液引入锌湿法冶炼系统酸性浸出工段中,滤液与稀硫酸浸出液体积比为1:5-1:10,滤液中残余稀硫酸用于浸出,反应后浆液缓慢引入沉铁工段,鼓入压缩空气、氧气或添加双氧水进行氧化,添加锌焙砂或碱作为中和剂,调节pH为3.5-7,继续反应0.5-3h沉铁,过滤,所得滤液进入锌冶炼浆化槽回收,滤渣返回步骤(1)用于配制脱硫吸收浆液;
(5)步骤(3)所得滤渣进入火法炼锌回转窑工艺,进一步回收渣中锌、铅。
2.根据权利要求1所述的利用湿法炼锌含铁沉淀渣处理锌冶炼二氧化硫烟气的方法,其特征在于:湿法炼锌含铁沉淀渣与水的质量体积比g:mL为1:3-1:10。
3.根据权利要求1所述的利用湿法炼锌含铁沉淀渣处理锌冶炼二氧化硫烟气的方法,其特征在于:锌冶炼二氧化硫烟气中SO2浓度为500-10000mg/m3,O2含量为8-20%,烟气温度为40-90℃。
4.根据权利要求1所述的利用湿法炼锌含铁沉淀渣处理锌冶炼二氧化硫烟气的方法,其特征在于:脱硫塔设置一个或多个,用于一级或多级脱硫。
5.根据权利要求1所述的利用湿法炼锌含铁沉淀渣处理锌冶炼二氧化硫烟气的方法,其特征在于:步骤(4)中每立方米反应溶液鼓入压缩空气或氧气的量为2-5m3/h。
6.根据权利要求1所述的利用湿法炼锌含铁沉淀渣处理锌冶炼二氧化硫烟气的方法,其特征在于:步骤(4)中双氧水添加量为每立方米反应溶液添加2-10L。
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CN113136488A (zh) * | 2021-04-22 | 2021-07-20 | 中化化工科学技术研究总院有限公司 | 一种湿法炼锌中铁矾渣的湿法处理工艺 |
CN115011811A (zh) * | 2022-06-13 | 2022-09-06 | 福州大学 | 一种挥发回转窑-脱硫系统加料联控方法 |
CN116812874A (zh) * | 2023-08-30 | 2023-09-29 | 昆明理工大学 | 一种湿法炼锌高硫渣高效回收硫磺和锌银的方法 |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011100809A1 (en) * | 2010-02-19 | 2011-08-25 | Vladko Todorov Panayotov | Method for removing harmful emission from exhaust gases |
CN102755826A (zh) * | 2012-07-06 | 2012-10-31 | 江苏恒丰伟业科技工程有限公司 | 氧化锌法冶炼行业尾气脱硫 |
CN109954380A (zh) * | 2017-12-26 | 2019-07-02 | 株洲冶炼集团股份有限公司 | 一种用于锌冶炼工艺的烟气脱硫系统 |
-
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Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011100809A1 (en) * | 2010-02-19 | 2011-08-25 | Vladko Todorov Panayotov | Method for removing harmful emission from exhaust gases |
CN102755826A (zh) * | 2012-07-06 | 2012-10-31 | 江苏恒丰伟业科技工程有限公司 | 氧化锌法冶炼行业尾气脱硫 |
CN109954380A (zh) * | 2017-12-26 | 2019-07-02 | 株洲冶炼集团股份有限公司 | 一种用于锌冶炼工艺的烟气脱硫系统 |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN113136488A (zh) * | 2021-04-22 | 2021-07-20 | 中化化工科学技术研究总院有限公司 | 一种湿法炼锌中铁矾渣的湿法处理工艺 |
CN115011811A (zh) * | 2022-06-13 | 2022-09-06 | 福州大学 | 一种挥发回转窑-脱硫系统加料联控方法 |
CN115011811B (zh) * | 2022-06-13 | 2023-11-21 | 福州大学 | 一种挥发回转窑-脱硫系统加料联控方法 |
CN116812874A (zh) * | 2023-08-30 | 2023-09-29 | 昆明理工大学 | 一种湿法炼锌高硫渣高效回收硫磺和锌银的方法 |
CN116812874B (zh) * | 2023-08-30 | 2023-11-17 | 昆明理工大学 | 一种湿法炼锌高硫渣高效回收硫磺和锌银的方法 |
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