KR100446871B1 - Batch composition of refractories for preventing oxidation of back surface in carbon contained basic refractory brick - Google Patents

Batch composition of refractories for preventing oxidation of back surface in carbon contained basic refractory brick Download PDF

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KR100446871B1
KR100446871B1 KR10-1999-0059892A KR19990059892A KR100446871B1 KR 100446871 B1 KR100446871 B1 KR 100446871B1 KR 19990059892 A KR19990059892 A KR 19990059892A KR 100446871 B1 KR100446871 B1 KR 100446871B1
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refractory brick
carbon
oxidation
refractory
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KR10-1999-0059892A
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KR20010060406A (en
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홍기곤
박세민
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주식회사 포스코
재단법인 포항산업과학연구원
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    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/01—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics
    • C04B35/10—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on oxide ceramics based on aluminium oxide
    • C04B35/101—Refractories from grain sized mixtures
    • C04B35/103—Refractories from grain sized mixtures containing non-oxide refractory materials, e.g. carbon
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/515—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics
    • C04B35/52—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products based on non-oxide ceramics based on carbon, e.g. graphite
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B35/00—Shaped ceramic products characterised by their composition; Ceramics compositions; Processing powders of inorganic compounds preparatory to the manufacturing of ceramic products
    • C04B35/66—Monolithic refractories or refractory mortars, including those whether or not containing clay
    • C—CHEMISTRY; METALLURGY
    • C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
    • C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
    • C04B2235/00—Aspects relating to ceramic starting mixtures or sintered ceramic products
    • C04B2235/02—Composition of constituents of the starting material or of secondary phases of the final product
    • C04B2235/30—Constituents and secondary phases not being of a fibrous nature
    • C04B2235/34—Non-metal oxides, non-metal mixed oxides, or salts thereof that form the non-metal oxides upon heating, e.g. carbonates, nitrates, (oxy)hydroxides, chlorides
    • C04B2235/3409—Boron oxide, borates, boric acids, or oxide forming salts thereof, e.g. borax

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Materials Engineering (AREA)
  • Structural Engineering (AREA)
  • Organic Chemistry (AREA)
  • Compositions Of Oxide Ceramics (AREA)

Abstract

본 발명은 전로 및 티밍래들 등의 각종 요로에 사용되는 카본함유 염기성 내화벽돌의 산화방지용 내화조성물에 관한 것으로, 본 발명에 따른 카본함유 염기성 내화벽돌의 배면산화 방지용 내화조성물은, 입도가 1 mm 이하인 마그네시아 분말과 비정질 카본이 중량비로 10:90 내지 50:50의 조성으로 혼합되고, 여기에 보론화합물이 B2O3로 환산시 외삽으로 10 중량% 이하 첨가된 것으로써, 내화벽돌의 융착현상없이 배면산화가 방지되는 효과가 있다.The present invention relates to a refractory composition for preventing oxidation of carbon-containing basic refractory bricks used in various urinary tracts, such as converters and teaming ladles, wherein the refractory composition for preventing back oxidation of a carbon-containing basic refractory brick according to the present invention has a particle size of 1 mm. The following magnesia powder and amorphous carbon are mixed in a weight ratio of 10:90 to 50:50, and the boron compound is added at an amount of 10% by weight or less when converted to B 2 O 3, thereby causing fusion of the refractory brick. It is effective to prevent backside oxidation.

Description

카본함유 염기성 내화벽돌의 배면산화 방지용 내화조성물{BATCH COMPOSITION OF REFRACTORIES FOR PREVENTING OXIDATION OF BACK SURFACE IN CARBON CONTAINED BASIC REFRACTORY BRICK}BATCH COMPOSITION OF REFRACTORIES FOR PREVENTING OXIDATION OF BACK SURFACE IN CARBON CONTAINED BASIC REFRACTORY BRICK}

본 발명은 전로 및 티밍래들 등의 각종 요로에 사용되는 카본함유 염기성 내화벽돌의 산화방지용 내화조성물에 관한 것으로, 더욱 상세하게는 입도가 1 mm 이하인 마그네시아 분말과 비정질 카본이 중량비로 10:90 내지 50:50의 조성으로 혼합되고, 여기에 보론화합물이 B2O3로 환산시 외삽으로 10 중량% 이하 첨가된 카본함유 염기성 내화벽돌의 배면산화 방지용 내화조성물에 관한 것이다.The present invention relates to an anti-oxidation refractory composition for carbon-containing basic refractory bricks used in various urinary tracts, such as converters and Timing ladles, more specifically, magnesia powder having a particle size of 1 mm or less and amorphous carbon in a weight ratio of 10:90 to The present invention relates to a refractory composition for preventing back oxidation of a carbon-containing basic refractory brick in which a boron compound is added at an amount of 10% by weight or less when converted into B 2 O 3 .

일반적으로 전로 및 티밍래들과 같은 제강용 요로에는 MgO-C질의 카본함유 염기성 내화벽돌이 사용되고 있다. 이러한 MgO-C질 내화벽돌은 용강이나 슬래그에 대한 내식성은 우수하지만, 장기간 사용시 내화벽돌의 배면이 산화되어 내화벽돌의 열화로 인한 노체수명의 단축이 초래된다.In general, MgO-C carbon-containing basic refractory bricks are used in steelmaking furnaces such as converters and teaming ladles. The MgO-C quality refractory brick is excellent in corrosion resistance to molten steel or slag, but when used for a long time, the back surface of the refractory brick is oxidized, resulting in shortening of the life span due to deterioration of the refractory brick.

MgO-C질 내화벽돌에 사용되는 수계 몰탈은 예열시 수증기의 발생으로 인해 내화벽돌의 특성을 저하시키고, 특히 배면에서는 가동면에 사용되는 MgO-C질 내화벽돌과 준영구장 내화벽돌과의 반응융착을 초래하여 해체성이 불량한 단점이 있다.Water-based mortar used for MgO-C quality fire bricks degrades the characteristics of fire bricks due to the generation of water vapor during preheating, and in particular, reaction fusion of MgO-C quality fire bricks and semi-permanent refractory bricks on the back surface There is a disadvantage of poor disassembly.

따라서, 카본함유 염기성 내화벽돌의 배면산화를 방지하여 그 수명을 연장시키고 또한 내화벽돌의 융착이 발생하지 않는 내화조성물의 개발이 필요하다.Therefore, it is necessary to prevent the backside oxidation of carbon-containing basic refractory bricks to extend their lifespan and to develop a refractory composition that does not cause fusion of the refractory bricks.

본 발명은 상기한 바와 같은 문제점을 해결하기 위한 것으로, 그 목적은 카본함유 염기성 내화벽돌의 배면산화를 방지하여 내화벽돌의 배면손상을 방지함과 동시에 사용후 카본함유 염기성 내화벽돌의 해체성이 우수한 카본함유 염기성 내화벽돌의 배면산화 방지용 내화조성물을 제공하는 데 있다.The present invention is to solve the problems as described above, the purpose is to prevent the back oxidation of the carbon-containing basic refractory brick to prevent the back damage of the refractory brick and at the same time excellent disassembly of the carbon-containing basic refractory brick after use It is to provide a refractory composition for preventing the rear oxidation of carbon-containing basic refractory brick.

상기한 바와 같은 목적을 달성하기 위하여, 본 발명에 따른 카본함유 염기성 내화벽돌의 배면산화 방지용 내화조성물은 입도가 1 mm 이하인 마그네시아 분말과 비정질 카본이 중량비로 10:90 내지 50:50의 조성으로 혼합되고, 여기에 보론화합물이 B2O3로 환산시 외삽으로 10 중량% 이하 첨가되는 것을 특징으로 한다.In order to achieve the object as described above, the refractory composition for preventing the rear oxidation of the carbon-containing basic refractory brick according to the present invention is magnesia powder having a particle size of 1 mm or less and amorphous carbon in a weight ratio of 10:90 to 50:50 Herein, the boron compound is characterized in that the addition of 10% by weight or less when converted to B 2 O 3 .

이하, 본 발명에 따른 카본함유 염기성 내화벽돌의 배면산화 방지용 내화조성물에 대해 상세히 설명한다.Hereinafter, the refractory composition for preventing the rear oxidation of the carbon-containing basic refractory brick according to the present invention will be described in detail.

카본함유 염기성 내화벽돌의 주원료로서 일반적으로 사용하는 염기성 분말로는 마그네시아와 칼시아가 있는데, 그 중에서 칼시아는 내수화성이 약하기 때문에, 본 발명에서는 마그네시아 분말을 사용한다.Basic powders generally used as main raw materials of carbon-containing basic refractory bricks include magnesia and calcia. Among them, magnesia powder is used in the present invention because calcia has poor water resistance.

본 발명에서 사용되는 마그네시아 분말로서 특별히 한정하는 것은 없으며 전융 마그네시아 분말, 소결 마그네시아 분말, 천연 마그네시아 분말 중 어느 것을 사용하여도 무방하나, 불순물의 영향을 최소화하기 위하여 순도가 98% 이상인 것이 바람직하다.There is no particular limitation on the magnesia powder used in the present invention, and any one of an electrolytic magnesia powder, a sintered magnesia powder, and a natural magnesia powder may be used, but the purity is preferably 98% or more in order to minimize the influence of impurities.

마그네시아 분말의 입자크기는 1 mm 이하인 것이 바람직하며, 그 이유는 입도가 1 mm를 초과할 경우 배면에서의 충진성이 저하되어 카본함유 내화벽돌의 산화방지 효과가 저하되기 때문이다.It is preferable that the particle size of magnesia powder is 1 mm or less, because when the particle size exceeds 1 mm, the filling property in the back surface falls and the antioxidant effect of the carbon-containing refractory brick falls.

비정질 카본의 입자크기는 일반적으로 1 mm 이하이므로 입자크기에 대해 특별히 한정하는 것은 없으며, 불순물에 의한 반응을 억제하기 위하여 순도가 95% 이상인 것이 바람직하다.Since the particle size of amorphous carbon is generally 1 mm or less, there is no particular limitation on the particle size, and in order to suppress the reaction due to impurities, the purity is preferably 95% or more.

이러한 마그네시아 분말과 비정질 카본을 중량비로 10:90 내지 50:50으로 혼합한다. 마그네시아 분말의 함유량이 10 중량% 미만이면 마그네시아 분말이 부족하여 카본함유 염기성 내화벽돌 배면산화 방지용 내화조성물의 충진이 불량하여 산화방지 효과가 저하되며, 마그네시아 분말의 함유량이 50 중량%를 초과하면 마그네시아 분말의 함유량이 과다하고 상대적으로 비정질 카본의 함유량이 적어지므로 카본함유 염기성 내화벽돌의 산화방지 효과가 저하되기 때문이다.Such magnesia powder and amorphous carbon are mixed in a weight ratio of 10:90 to 50:50. If the content of magnesia powder is less than 10% by weight, the magnesia powder is insufficient and the filling of carbon-containing basic refractory brick backing prevention fireproof composition is poor, and the antioxidant effect is lowered. This is because an excessive amount of and relatively low content of amorphous carbon decreases the antioxidant effect of the carbon-containing basic refractory brick.

이러한 마그네시아 분말과 비정질 카본의 혼합물에 비정질 카본의 산화방지를 목적으로 보론 화합물을 첨가한다. 보론 화합물의 첨가량은 B2O3로 환산시 외삽으로 10 중량% 이하가 되도록 하며, 이것은 10 중량%를 초과하면 B2O3의 사용량이 과다하여 내화벽돌의 배면 온도가 500℃ 이상이 되면 B2O3의 용융으로 인한 융착현상이 발생되기 때문이다. B2O3의 공급원으로서 특별히 한정하는 것은 없으며, B2O3분말, 보론산, 보론 염화물 등 어느 것을 사용하여도 무방하다.A boron compound is added to the mixture of magnesia powder and amorphous carbon for the purpose of preventing oxidation of amorphous carbon. The addition amount of the boron compound is 10% by weight or less by extrapolation when converted into B 2 O 3. When the amount of the boron compound exceeds 10% by weight, the amount of B 2 O 3 is excessively used, and when the temperature of the firebrick becomes more than 500 ° C. This is because fusion phenomenon occurs due to melting of 2 O 3 . As a source of B 2 O 3 it is not particularly limited, and may be used, such as that which B 2 O 3 powder, boric acid, boron chloride.

이하, 본 발명의 일실시예를 상세히 설명한다.Hereinafter, an embodiment of the present invention will be described in detail.

실시예 1 및 실시예 2로서, 입도가 1 mm 이하인 소결 마그네시아 분말과 비정질 카본을 중량비로 각각 10:90 및 50:50으로 혼합하고, 여기에 B2O3분말을 외삽으로 10 중량% 이하로 첨가하였다. 이러한 조성의 내화조성물을 티밍래들의 슬래그 라인용 MgO-C질 내화벽돌의 배면에 적용하였다. 이 티밍래들에 용강을 156회 출강하여 조업한 후, MgO-C질 내화벽돌의 잔존량이 50 mm인 것을 기준으로 하였을 때 내화벽돌 배면의 산화층의 평균두께를 측정하였으며, 그 결과를 조성과 함께 표 1에 나타내었다.As Examples 1 and 2, sintered magnesia powder having a particle size of 1 mm or less and amorphous carbon were mixed at a weight ratio of 10:90 and 50:50, respectively, and B 2 O 3 powder was extrapolated to 10% by weight or less. Added. The refractory composition of this composition was applied to the back of the MgO-C quality refractory brick for the slag line of the Timing Ladle. After melting and operating molten steel 156 times in this teaming ladle, the average thickness of the oxide layer on the back side of the refractory brick was measured based on the residual amount of MgO-C quality refractory brick of 50 mm. Table 1 shows.

한편, 비교예로서 본 발명에서 언급한 마그네시아 분말의 입도 및 마그네시아 분말과 비정질 카본의 혼합비를 벗어난 범위에서 내화조성물을 제조하고 이를 본 발명의 실시예와 같은 방법으로 티밍래들에 적용하여 내화벽돌 배면의 산화층의 평균두께를 측정하였으며, 그 결과와 조성이 본 발명의 실시예와 함께 표 1에 나타나있다.Meanwhile, as a comparative example, a refractory composition was prepared in a range outside the particle size of the magnesia powder and the mixing ratio of the magnesia powder and the amorphous carbon mentioned in the present invention, and applied to the Timing Ladle in the same manner as in the embodiment of the present invention to the firebrick back surface. The average thickness of the oxide layer was measured, and the results and compositions are shown in Table 1 together with the examples of the present invention.

비교예 1에서는 소결 마그네시아 분말의 입도를 본 발명의 범위에서 벗어난 1 mm 초과인 것을 사용하였다. 비교예 2 및 3에서는, 입도가 1 mm 이하인 소결 마그네시아 분말과 비정질 카본을 각각 본 발명의 범위에서 벗어난 혼합비인 5:95 및 60:40의 중량비로 혼합하였다. 비교예 4에서는 1 mm 이하 입도의 소결 마그네시아분말과 비정질 카본을 50:50의 중량비로 혼합하고 여기에 B2O3를 본 발명의 범위에서 벗어난 15 중량%로 혼합하였다.In Comparative Example 1, the particle size of the sintered magnesia powder was used more than 1 mm outside the scope of the present invention. In Comparative Examples 2 and 3, sintered magnesia powder and amorphous carbon having a particle size of 1 mm or less were mixed in a weight ratio of 5:95 and 60:40, respectively, which were outside the scope of the present invention. In Comparative Example 4, the sintered magnesia powder and the amorphous carbon having a particle size of 1 mm or less were mixed at a weight ratio of 50:50, and B 2 O 3 was mixed at 15% by weight outside the scope of the present invention.

실시예Example 비교예Comparative example 1One 22 1One 22 33 44 소결 마그네시아의 입도Particle Size of Sintered Magnesia 1mm 이하1mm or less 1mm 이하1mm or less 1mm 이상1mm or more 1mm 이하1mm or less 1mm 이하1mm or less 1mm 이하1mm or less 소결 마그네시아와 비정질 카본의 혼합비 (중량비)Mixing ratio of sintered magnesia and amorphous carbon (weight ratio) 10:9010:90 50:5050:50 50:5050:50 5:955:95 60:4060:40 50:5050:50 B2O3첨가량 (외삽, 중량%)Addition amount of B 2 O 3 (extrapolation, weight%) 1010 33 1010 55 77 1515 배면 산화층의 두께 (mm)Back oxide layer thickness (mm) 22 33 2121 1414 1212 44 비고Remarks 내화벽돌의 융착발생Fusion of Refractory Bricks

표 1에 도시된 바와 같이, 실시예 1 및 2의 결과 내화벽돌의 배면 산화층은 각각 2 mm 및 3 mm정도로 매우 얇은 것으로서, 배면산화 방지의 역할을 충분히 수행한 것이다.As shown in Table 1, as a result of Examples 1 and 2, the back oxide layer of the refractory brick was very thin, about 2 mm and 3 mm, respectively, and sufficiently performed the role of preventing the back oxidation.

반면에, 본 발명의 범위를 벗어난 비교예 1 내지 3에서는 배면 산화층의 두께가 각각 21 mm, 14 mm, 12mm로 매우 두껍기 때문에 배면산화가 거의 방지되지 못하였으며, 비교예 4에서는 내화벽돌의 융착현상이 발생하였다.On the other hand, in Comparative Examples 1 to 3 outside the scope of the present invention, since the thickness of the rear oxide layer was very thick, respectively, 21 mm, 14 mm, and 12 mm, the rear surface oxidation was hardly prevented. This occurred.

상기한 바와 같이, 본 발명에 따른 카본함유 염기성 내화벽돌의 배면 산화방지용 내화조성물을 이용하면 내화벽돌의 융착현상없이 배면산화가 방지되는 효과가 있다.As described above, when the refractory composition for preventing oxidation of the carbon-containing basic refractory brick according to the present invention is used, there is an effect that the rear oxidation is prevented without the fusion phenomenon of the refractory brick.

Claims (2)

입도가 1 mm 이하인 마그네시아 분말과 비정질 카본이 중량비로 10:90 내지 50:50의 조성으로 혼합되고, 여기에 보론화합물이 B2O3로 환산시 외삽으로 0 보다 크고 10 중량% 이하로 첨가된 카본함유 염기성 내화벽돌의 배면산화 방지용 내화조성물.Magnesia powder having a particle size of 1 mm or less and amorphous carbon are mixed in a weight ratio of 10:90 to 50:50, and the boron compound is extrapolated to greater than 0 and 10% by weight or less when converted to B 2 O 3 . A refractory composition for preventing back oxidation of a carbon-containing basic refractory brick. 제 1 항에 있어서, 상기 마그네시아 분말은 순도가 98% 이상인 것을 사용하고, 상기 비정질 카본은 순도가 95% 이상인 것을 사용하는 것을 특징으로 하는 카본함유 염기성 내화벽돌의 배면산화 방지용 내화조성물.The fire resistant composition according to claim 1, wherein the magnesia powder is one having a purity of 98% or more, and the amorphous carbon is one having a purity of 95% or more.
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KR20030018817A (en) * 2001-08-31 2003-03-06 주식회사 포스코 Refractory mortar containing carbon
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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR840003593A (en) * 1981-10-26 1984-09-15 사까다 데쓰오 Carbon-containing firebrick
JPH01286950A (en) * 1988-05-12 1989-11-17 Kawasaki Refract Co Ltd Carbon-containing refractory
KR960004273A (en) * 1994-07-26 1996-02-23 김만제 Process for producing magnesia-carbon refractory bricks
JPH08259340A (en) * 1995-03-24 1996-10-08 Toshiba Ceramics Co Ltd Magnesia-carbon-based castable refractory
KR970042411A (en) * 1995-12-29 1997-07-24 서상기 High Strength Magnetizer-Carbon Refractory
KR19980052567A (en) * 1996-12-24 1998-09-25 서상기 Magnesia-alumina-carbon basic bricks for ladle
KR20000040775A (en) * 1998-12-19 2000-07-05 신현준 Carbon-containing amorphous refractory composition

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR840003593A (en) * 1981-10-26 1984-09-15 사까다 데쓰오 Carbon-containing firebrick
JPH01286950A (en) * 1988-05-12 1989-11-17 Kawasaki Refract Co Ltd Carbon-containing refractory
KR960004273A (en) * 1994-07-26 1996-02-23 김만제 Process for producing magnesia-carbon refractory bricks
JPH08259340A (en) * 1995-03-24 1996-10-08 Toshiba Ceramics Co Ltd Magnesia-carbon-based castable refractory
KR970042411A (en) * 1995-12-29 1997-07-24 서상기 High Strength Magnetizer-Carbon Refractory
KR19980052567A (en) * 1996-12-24 1998-09-25 서상기 Magnesia-alumina-carbon basic bricks for ladle
KR20000040775A (en) * 1998-12-19 2000-07-05 신현준 Carbon-containing amorphous refractory composition

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