WO2009145348A1 - 銑鉄製造方法 - Google Patents
銑鉄製造方法 Download PDFInfo
- Publication number
- WO2009145348A1 WO2009145348A1 PCT/JP2009/060101 JP2009060101W WO2009145348A1 WO 2009145348 A1 WO2009145348 A1 WO 2009145348A1 JP 2009060101 W JP2009060101 W JP 2009060101W WO 2009145348 A1 WO2009145348 A1 WO 2009145348A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- zinc
- iron
- dust
- raw material
- pig iron
- Prior art date
Links
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
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/10—Making spongy iron or liquid steel, by direct processes in hearth-type furnaces
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/22—Dust arresters
-
- 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
- C22B1/16—Sintering; Agglomerating
-
- 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
- C22B19/00—Obtaining zinc or zinc oxide
- C22B19/34—Obtaining 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
- C22B5/00—General methods of reducing to metals
- C22B5/02—Dry methods smelting of sulfides or formation of mattes
- C22B5/16—Dry methods smelting of sulfides or formation of mattes with volatilisation or condensation of the metal being produced
-
- 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
-
- 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 producing pig iron from iron ore containing zinc in a high concentration.
- Crude steel production methods are broadly divided into the blast furnace single converter method, which produces pig iron from iron ore and turns it into steel, and the electric furnace method, in which scrap is melted and refined.
- the blast furnace single converter method which produces pig iron from iron ore and turns it into steel
- the electric furnace method in which scrap is melted and refined.
- the inner wall of the furnace shaft is particularly prone to agglomerate, and the surrounding coke ore is adhered and the packing is immobilized.
- a stationary part is called “Anzat”, which makes the descent of the charged material in the furnace unstable and causes troubles such as “shelf hanging” and “slip”.
- Zinc is an indispensable metal, for example, as a battery material, and as a plating material that improves the corrosion resistance of the steel sheet surface. It is common to oxidize and sinter sulfide ore to make zinc oxide, and to make zinc metal by wet or dry method, but in recent years, ironmaking dust etc. are made to obtain crude zinc oxide. In addition, a method of using zinc-made raw material as a raw material has been proposed.
- high concentration of crude zinc oxide can be achieved by intermediate treatment such as the Wertz method, and it can be used as a raw material for zinc slag It is.
- crude zinc oxide having a zinc concentration exceeding 50 m s s% it can be used directly as crude zinc oxide used for zinc refining such as the ISP method.
- An object of the present invention is to provide a pig iron production method using a zinc-containing iron ore that enables effective utilization of the high-zinc-containing iron ore.
- Another object of the present invention is to provide a pig iron production method using a high zinc content iron ore that can solve the short supply of both zinc and iron.
- the present invention provides a pig iron manufacturing method comprising a blast furnace raw material manufacturing process, a pig iron manufacturing process, a dust recovery process, and a zinc recovery process.
- the blast furnace raw material production process consists of producing a blast furnace raw material using a high zinc-containing iron ore containing zinc in an amount of 0.01 mass% or more and iron in an amount of 50 mass% or more.
- the pig iron production process consists of charging the blast furnace raw material into the blast furnace to produce pig iron, and discharging blast furnace exhaust gas containing zinc-containing dust from the furnace term.
- the dust recovery process consists of recovering the zinc-containing dust in the blast furnace exhaust gas.
- the zinc recovery step consists of recovering zinc from the zinc-containing dust using a reduction furnace.
- the high zinc-containing iron ore preferably contains 0.01 to 0.5 mass% zinc and 50 to 70 mass% iron.
- the blast furnace raw material is preferably at least one selected from the group consisting of sintered slag, pellets, lump, carbon-containing agglomerate, and ferrocoatus. More preferably, the blast furnace raw material is sintered koji.
- the blast furnace raw material production step comprises producing a blast furnace raw material by using the zinc-containing iron ore containing zinc in an amount of 0.0 l mass% or more and iron in an amount of 50 mass% or more and the zinc-containing dust.
- the pig iron production step comprises producing pig iron by charging a blast furnace raw material having a blast furnace charge zinc amount of 2500 g or less per 1 ton of pig iron into the blast furnace. More preferably, it is 60-250 g per ton of pig iron.
- the reducing furnace is preferably one selected from the group consisting of a rotary kiln, a shaft furnace and a mobile hearth furnace.
- the zinc recovery step loads zinc-containing dust on the hearth of a mobile hearth furnace, supplies heat from the top of the hearth to reduce the zinc-containing dust, produces reduced iron, and collects zinc It is desirable to consist of.
- the zinc-containing dust has an average zinc concentration of 0.45 mass% or more.
- a mixed raw material containing zinc-containing dust and zinc-containing steel by-product powder is loaded on the hearth of a mobile hearth furnace, and heat is supplied from above the hearth to reduce the mixed raw material, It preferably consists of producing reduced iron and recovering crude zinc oxide.
- the zinc-containing steel by-product powder is at least one selected from the group consisting of dust generated from a blast furnace, dust generated from a converter, dust generated from an electric furnace, and sludge generated in a surface treatment process. Is desirable.
- a mixed raw material in which zinc-containing dust and a component adjusting material are mixed is loaded on a mobile hearth, and heat is supplied from the upper portion of the mobile hearth to reduce the mixed raw material. And the recovery of zinc.
- the mixed raw material has an average zinc concentration of not less than 0.45 mass%.
- a mixed raw material containing zinc-containing dust, a component adjusting material and zinc-containing steel byproduct powder is loaded on the hearth of a mobile hearth furnace, and heat is supplied from the upper part of the hearth to mix the materials. It preferably consists of reducing the raw material, producing reduced iron and recovering the crude zinc oxide.
- the zinc-containing steel byproduct powder is at least one selected from the group consisting of dust generated from a blast furnace, dust generated from a converter, dust generated from an electric furnace, and sludge generated in a surface treatment process. Is desirable.
- FIG. 1 is a schematic diagram showing a pig iron manufacturing method according to the embodiment.
- FIG. 2 is a flowchart showing the flow of zinc under condition 1 of the embodiment.
- FIG. 3 is a flowchart showing the flow of zinc under condition 5 of the embodiment.
- FIG. 4 is a flowchart showing the flow of zinc under condition 8 of the embodiment.
- FIG. 5 is a flowchart showing the flow of zinc under the condition 11 of the embodiment. Explanation of symbols
- the inventors of the present invention use iron ore containing zinc, and use iron ore containing iron ore as a blast furnace raw material such as sintered ore in order to effectively use the iron content and zinc content.
- the present invention was completed by recalling the recycling to the process and the recovery of zinc from the zinc-containing dust in the furnace exhaust gas used for cement raw materials.
- the zinc-containing iron ore used in the present invention has a higher zinc content than iron ore used as a normal blast furnace raw material.
- zinc is 0.0 lmass% or more, and iron is 50%.
- For zinc for example, about 0.5 mass% or less, For example, it is about 70 mass% or less.
- the content of the alkali component such as N a 2 0, K 2 0 of the high zinc-containing iron ore, in terms of oxide is usually 0. 0 8 mass% or more.
- the content of the alkali component is preferably 1 mass% or less, which is effective in preventing low-temperature reduced powdering of the sintered ore.
- zinc concentration treatment may be performed using a reduction furnace to produce crude zinc oxide, which may be converted to zinc metal by wet or dry ironmaking. it can.
- the reduction furnace used here include a rotary kiln shaft furnace and a mobile hearth furnace.
- the dust generated in the reduction furnace is concentrated in zinc compared to the dust discharged from the blast furnace, so it is effective to collect the dust generated in the reduction furnace and use it as a raw material for crude zinc oxide. Is. At the same time, it is preferable to collect iron in the dust.
- a mobile hearth furnace As the reduction furnace.
- zinc-containing dust is loaded on the horizontally moving hearth, heated from above by radiant heat transfer to reduce the dust, and reduced iron is simultaneously added to the hearth. It is possible to manufacture.
- a mixed raw material in which zinc-containing dust and a component adjusting material are mixed is loaded, heated from above by radiant heat transfer to reduce the dust, and reduced iron is simultaneously produced on the hearth. Furthermore, by melting this reduction product on the hearth, it is possible to separate the slag and metal and produce reduced iron as granular iron.
- reduced iron is produced and zinc is recovered from dust contained in the exhaust gas generated in the mobile hearth furnace.
- the component adjusting material it is preferable to use carbonaceous materials such as limestone, silica sand, dust other than blast furnace dust, sludge, and coke powder.
- This moving hearth; ⁇ is a furnace that heats in the process of moving the hearth of the heating furnace horizontally, and the horizontally moving hearth is typically in the form of rotational movement,
- This type of mobile hearth furnace is called a rotary hearth furnace.
- the present invention will be described in the case where pig iron is manufactured using high zinc-containing iron ore and zinc is recovered using a rotary hearth furnace.
- blast furnace raw material 2 and solid fuel are charged into blast furnace 1 from the top of the furnace using a furnace top charging device.
- the blast furnace raw material 2 sintered ore is mainly used, and in addition, pellets, agglomerates, coal-containing agglomerated minerals, ferrocortas and the like are used.
- iron ore containing iron oxide containing zinc in an amount of not less than 0. Olmass s% and iron in an amount of not less than 50 ma ss% is used as a raw material. From the viewpoint of zinc recovery, the larger the amount of zinc charged to the blast furnace, the better. However, in order to prevent the deterioration of operation due to deposits in the furnace, the amount of zinc contained in the blast furnace should be kept below the specified value. It is desirable to adjust the amount of iron ore to be used as blast furnace raw material and to be charged into the blast furnace.
- the predetermined value is empirically set for each blast furnace, but it should be, for example, 2500 g or less per 1 ton of pig iron. It is also possible to use the zinc-containing dust in the blast furnace exhaust gas together with the high zinc-containing iron ore as the blast furnace charging raw material within a range not exceeding the predetermined value.
- the charged blast furnace raw material 2 is reduced and melted in the blast furnace 1 to produce pig iron 3.
- Dust 4 is discharged from the upper part of the furnace together with the exhaust gas, and this dust 4 contains iron and zinc.
- the zinc-containing dust 4 is reduced in the rotary hearth furnace 5, and after zinc is vaporized, it is reoxidized, and the crude zinc oxide 6 is recovered as dust in the exhaust gas generated in the rotary hearth furnace.
- the dust contained in the exhaust gas generated in the rotary hearth furnace is enriched with zinc, and can be used as a raw material for zinc slag either directly or through a refining process.
- the iron content in the dust is recovered as reduced iron 7.
- zinc-containing dust 4 contains other slag components in addition to iron and zinc.
- slag components which are ash, are contained in coal, coal chain, and coatas, which are representative examples of carbon-based solid reducing materials. For this reason, it is inevitable that slag will be mixed into the reduced iron product, in rotary kilns and moving hearth furnaces that perform only reduction operations. When the raw material is reduced and melted on the hearth of the rotary hearth furnace, the metal produced by the reduction and the slag, which is the residue, can be quickly separated, and a high-density reduced iron product iron is obtained. be able to.
- the heating temperature when reducing and melting dust in a rotary hearth furnace should be at least 14 500 ° C. And are preferred.
- the maximum temperature in the rotary hearth furnace to 1450 ° C or higher, the raw material that is reduced and melted in the furnace and the furnace becomes high temperature.
- the melted raw material is at a temperature of 1450 ° C or higher, sufficient fluidity can be secured, the gangue component in the metallic iron is removed, and the iron with good properties can be obtained. It can be manufactured.
- the present invention is a technology for producing pig iron using pig iron-containing iron ore
- zinc-containing steel byproduct powder 8 can be mixed and used. Noh.
- steel by-product powder with a higher zinc concentration than zinc-containing dust in the dust recovered from the exhaust gas generated in the rotary hearth furnace as described above, obtaining dust having a high concentration of crude zinc oxide Can do.
- recovered dust containing crude zinc oxide has different uses depending on the zinc concentration.
- the recovered dust produced by the above method has a zinc concentration exceeding 1 O mass%. It can be made into high-concentration crude zinc oxide by intermediate treatment such as, and can be used as a raw material for zinc.
- the zinc-containing steel by-product powder used by mixing with zinc-containing dust is not particularly limited.
- By-products in the steel industry can be used. If the average zinc concentration in the mixed raw material is 0.45 m a s s% or more, the zinc concentration of the recovered dust obtained by processing in the rotary hearth furnace can be set to 5 O m a s s% or more. If the zinc concentration of the recovered dust obtained is 5 O m s s% or more, intermediate treatment is not necessary and it can be used directly as crude zinc oxide used for zinc scouring.
- Example 1 As described above, when zinc-containing dust is reduced in a rotary hearth furnace, the zinc concentration in the recovered dust is improved and the economy is improved by using the zinc-containing steel byproduct powder mixed.
- sintered ore was produced using high-zinc-containing iron ore ordinary ore, and a pig iron production test was conducted using the equipment shown in FIG.
- Subject blast furnace is 5 0 0 O m 3 class large blast furnaces.
- Table 1 shows the blast furnace blowing conditions, and
- Table 2 shows the proportion of raw materials (iron ore) charged into the blast furnace.
- Composition of ore A used as raw material for sintered ore
- Table 3 shows the composition of the iron ore (ordinary ore) for sintering.
- T 1 F e is the total Fe.
- Ore A is an iron ore with a high zinc content, which is about 10 times higher than the zinc concentration of sintered iron ore with low zinc content. These ores were used as sintering raw materials in the proportions shown in Table 4, and the manufactured sintered ores were charged into a blast furnace and operated under conditions 1 to 11. Table 4
- Figures 2 to 5 show the flow of zinc in the entire steelworks under conditions 1, 5, 8, and 11.
- the numbers shown in the figures indicate the amount of zinc, and the unit is grams per 1 t of pig iron (g Z t — p).
- the use ratio of ore A is set to conditions 1 to 8, and the obtained sintered ore is charged into a blast furnace, and part of the dust (blast furnace dust) generated in the blast furnace operation is burned in some operations. Recycled as a raw material for producing ore. Dust that is not recycled as a raw material for sinter ore is reduced and melted using a rotary hearth furnace (described as “reduction furnace” in the column for waste furnace discharge dust treatment in Table 4). Obtained.
- Table 4 shows the zinc content in the sintered ore and the operation result of the amount of zinc charged in the blast furnace. Table 4 also shows the results of the iron recovery rate as granular iron in the reduction furnace, the zinc concentration of dust generated in the rotary hearth furnace, and the amount of zinc recovered.
- the usage ratio of ore A is set to conditions 9 to 11, and when the obtained sintered ore is charged into the blast furnace, the amount of dust discharged from the blast furnace is high Z n ( Zinc content 1 mass% or more) was recycled as cement raw material, and low Zn content (zinc content less than 1 mass%) was recycled and processed as sintered ore raw material.
- Condition 9 corresponds to the conventional operating conditions without using high zinc content ore.
- condition 10 and 1 the amount of zinc charged in the blast furnace exceeded 2550 g per pig iron, and the amount of zinc charged in the blast furnace increased. Due to poor unloading of goods, stable operation was difficult. In the case of condition 1 and 1, the failure was particularly noticeable, making it difficult to operate the blast furnace. 'Next, the raw material which mixed zinc containing dust and zinc containing steel byproduct powder was used.
- Table 5 shows the composition of the zinc-containing steel byproduct powder used. Here, dust generated from the converter was used as zinc-containing steel by-product powder. Table 5
- Table 6 shows the measurement results of the mixing ratio and zinc concentration of zinc-containing steel by-product powder in the mixed raw material, and the zinc concentration in the recovered dust.
- the zinc concentration in the recovered dust increases as the blending ratio of the zinc-containing steel by-product powder in the mixed raw material increases, and the zinc concentration in the mixed raw material becomes 0.45 ma S s% or more. It can be seen that the zinc concentration of the recovered dust, which is the product dust, exceeds 5 O mass%, and is a raw material that can be used directly for zinc refining such as ISP method. As described above, by using the method of the present invention, the zinc-containing iron ore can be used as a pig iron raw material, and the contained iron content and zinc content can be used effectively.
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Abstract
Description
Claims
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020127033259A KR20130010029A (ko) | 2008-05-30 | 2009-05-27 | 선철 제조 방법 |
CN2009801199908A CN102046817A (zh) | 2008-05-30 | 2009-05-27 | 生铁制造方法 |
US12/988,862 US8298316B2 (en) | 2008-05-30 | 2009-05-27 | Method for producing pig iron |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2008-141981 | 2008-05-30 | ||
JP2008141981 | 2008-05-30 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2009145348A1 true WO2009145348A1 (ja) | 2009-12-03 |
Family
ID=41377214
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2009/060101 WO2009145348A1 (ja) | 2008-05-30 | 2009-05-27 | 銑鉄製造方法 |
Country Status (6)
Country | Link |
---|---|
US (1) | US8298316B2 (ja) |
JP (1) | JP5428534B2 (ja) |
KR (2) | KR20130010029A (ja) |
CN (1) | CN102046817A (ja) |
TW (1) | TWI426133B (ja) |
WO (1) | WO2009145348A1 (ja) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010007180A (ja) * | 2008-05-30 | 2010-01-14 | Jfe Steel Corp | 高亜鉛含有鉄鉱石を用いた銑鉄製造方法 |
JP2012500902A (ja) * | 2008-08-30 | 2012-01-12 | タータ スチール リミテッド | 高濃度亜鉛を含有する鉄鉱石から亜鉛を分離し、鉄、有価物を抽出する方法 |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5592624B2 (ja) * | 2009-09-14 | 2014-09-17 | 高砂工業株式会社 | ロータリーキルン |
LU92150B1 (en) | 2013-02-15 | 2014-08-18 | Wurth Paul Sa | Process for charging a burden with a high zinc content in a blast furnace installation |
CN115642245A (zh) * | 2022-12-07 | 2023-01-24 | 福建南平南孚电池有限公司 | 一种防漏液碱性锌锰电池负极材料 |
CN115642244A (zh) * | 2022-12-07 | 2023-01-24 | 福建南平南孚电池有限公司 | 一种碱性锌锰电池负极材料 |
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KR20130010029A (ko) * | 2008-05-30 | 2013-01-24 | 제이에프이 스틸 가부시키가이샤 | 선철 제조 방법 |
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2009
- 2009-05-27 KR KR1020127033259A patent/KR20130010029A/ko not_active Application Discontinuation
- 2009-05-27 US US12/988,862 patent/US8298316B2/en not_active Expired - Fee Related
- 2009-05-27 TW TW98117943A patent/TWI426133B/zh not_active IP Right Cessation
- 2009-05-27 KR KR20107022542A patent/KR20100122952A/ko active Search and Examination
- 2009-05-27 WO PCT/JP2009/060101 patent/WO2009145348A1/ja active Application Filing
- 2009-05-27 CN CN2009801199908A patent/CN102046817A/zh active Pending
- 2009-05-29 JP JP2009129830A patent/JP5428534B2/ja not_active Expired - Fee Related
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Cited By (2)
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JP2010007180A (ja) * | 2008-05-30 | 2010-01-14 | Jfe Steel Corp | 高亜鉛含有鉄鉱石を用いた銑鉄製造方法 |
JP2012500902A (ja) * | 2008-08-30 | 2012-01-12 | タータ スチール リミテッド | 高濃度亜鉛を含有する鉄鉱石から亜鉛を分離し、鉄、有価物を抽出する方法 |
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US8298316B2 (en) | 2012-10-30 |
JP2010007180A (ja) | 2010-01-14 |
JP5428534B2 (ja) | 2014-02-26 |
KR20100122952A (ko) | 2010-11-23 |
TW201005099A (en) | 2010-02-01 |
KR20130010029A (ko) | 2013-01-24 |
TWI426133B (zh) | 2014-02-11 |
US20110041652A1 (en) | 2011-02-24 |
CN102046817A (zh) | 2011-05-04 |
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