KR100528573B1 - Concrete admixture composition manufacturing device mainly containing coal ash - Google Patents
Concrete admixture composition manufacturing device mainly containing coal ash Download PDFInfo
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- KR100528573B1 KR100528573B1 KR10-2002-0080522A KR20020080522A KR100528573B1 KR 100528573 B1 KR100528573 B1 KR 100528573B1 KR 20020080522 A KR20020080522 A KR 20020080522A KR 100528573 B1 KR100528573 B1 KR 100528573B1
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- ash
- cement
- coal ash
- concrete admixture
- raw
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- 239000010883 coal ash Substances 0.000 title claims abstract description 25
- 239000000203 mixture Substances 0.000 title claims abstract description 16
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 12
- 239000002956 ash Substances 0.000 claims abstract description 48
- 239000000843 powder Substances 0.000 claims abstract description 27
- 238000003860 storage Methods 0.000 claims abstract description 9
- 239000000126 substance Substances 0.000 claims abstract description 7
- 239000002245 particle Substances 0.000 claims abstract description 6
- 239000002994 raw material Substances 0.000 claims abstract description 5
- 238000005303 weighing Methods 0.000 claims description 6
- 239000000654 additive Substances 0.000 claims description 4
- 230000000996 additive effect Effects 0.000 claims description 4
- 239000010881 fly ash Substances 0.000 claims description 4
- 239000010882 bottom ash Substances 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 2
- 239000000428 dust Substances 0.000 claims 1
- 239000004568 cement Substances 0.000 abstract description 22
- 230000000694 effects Effects 0.000 abstract description 6
- 230000036571 hydration Effects 0.000 abstract description 6
- 238000006703 hydration reaction Methods 0.000 abstract description 6
- 238000006467 substitution reaction Methods 0.000 abstract description 6
- 238000001035 drying Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 239000002440 industrial waste Substances 0.000 abstract description 2
- 238000010298 pulverizing process Methods 0.000 abstract description 2
- 230000002028 premature Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 6
- 239000000047 product Substances 0.000 description 6
- 238000007670 refining Methods 0.000 description 5
- 239000002699 waste material Substances 0.000 description 4
- 235000002918 Fraxinus excelsior Nutrition 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 239000012717 electrostatic precipitator Substances 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000000295 fuel oil Substances 0.000 description 1
- 230000020169 heat generation Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
Classifications
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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
- C04B7/00—Hydraulic cements
- C04B7/24—Cements from oil shales, residues or waste other than slag
- C04B7/26—Cements from oil shales, residues or waste other than slag from raw materials containing flue dust, i.e. fly ash
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C5/00—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions
- B28C5/08—Apparatus or methods for producing mixtures of cement with other substances, e.g. slurries, mortars, porous or fibrous compositions using driven mechanical means affecting the mixing
- B28C5/0875—Mixing in separate stages involving different containers for each stage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B28—WORKING CEMENT, CLAY, OR STONE
- B28C—PREPARING CLAY; PRODUCING MIXTURES CONTAINING CLAY OR CEMENTITIOUS MATERIAL, e.g. PLASTER
- B28C9/00—General arrangement or layout of plant
- B28C9/02—General arrangement or layout of plant for producing mixtures of clay or cement with other materials
-
- 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
- C04B2290/00—Organisational aspects of production methods, equipment or plants
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Structural Engineering (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Mechanical Engineering (AREA)
- Processing Of Solid Wastes (AREA)
Abstract
본 발명은 시멘트(cement) 관련 기술에 관한 것으로, 특히 콘크리트 혼화재 조성물 제조장치에 관한 것으로, 더욱 상세하게는 석탄회를 주성분으로 하는 콘크리트 혼화재 조성물 제조장치에 관한 것이다. 본 발명은 산업폐기물로 버려지는 석탄회를 콘크리트 혼화재의 주성분으로 사용하여 시멘트 2차 제품의 원가 상승을 억제하면서 수화열 저감 효과 및 조기강도 저하를 유발하지 않고 혼화재의 시멘트 치환량을 최대 30%까지 증가시킬 수 있는 석탄회를 주성분으로 하는 콘크리트 혼화재 조성물 제조장치를 제공하는데 그 목적이 있다. 상기의 기술적 과제를 해결하기 위하여 본 발명은 화력발전소에서 발생하는 석탄회를 주성분으로 하는 콘크리트 혼화재 조성물 제조방법에 있어서, 상기 화력발전소에서 발생하는 수분 함량 15%의 원료석탄회(원료회, raw-ash)를 수분 함량 1% 이내로 건조하는 건조공정(4), 상기 건조된 원료회를 분말도 4,000∼10,000 ㎠/g 의 정제회(fine-ash)로 만들기 위한 분쇄(7)분급(8) 공정, 상기 분쇄분급된 정제회에 대하여 4∼16%의 화학혼화제(additive)를 첨가하여 혼합하는 혼합공정(11), 상기 혼합공정 후 제조 완료된 완제품의 콘크리트 혼화재를 저장하는 저장공정(9)(12)을 포함하는 것을 특징으로 하는 석탄회를 주성분으로 하는 콘크리트 혼화재 조성물 제조장치가 제공된다. 본 발명에 따르면 입경이 작고 가벼운 원료회를 원하는 수분함량 및 분말도를 가진 정제회로 안정하게 건조 및 분쇄분급할 수 있으며, 화학혼화제가 4∼16%의 비율로 첨가된 완제품인 석탄회를 콘크리트 혼화재로 사용할 경우, 시멘트 치환량을 최대 30%까지 증가시켜도 시멘트 2차 제품의 성능에 있어서, 유동성 증가 및 단위 수량(水量)감소, 시멘트 사용량 감소에 따른 수화열 저감, 조기강도 발현, 화학저항성 증대 등의 성능향상 효과를 발현할 수 있고, 시멘트 치환량 증가에 따라 시멘트 사용량이 감소됨으로써 시멘트 2차 제품의 생산원가 절감을 이룰 수 있는 것을 특징으로 하는 석탄회를 주성분으로 하는 콘크리트 혼화재 조성물 제조장치가 제공된다.The present invention relates to a cement-related technology, and more particularly, to a concrete admixture composition manufacturing apparatus, and more particularly to a concrete admixture composition manufacturing apparatus mainly comprising coal ash. The present invention can use the coal ash discarded as industrial waste as the main component of the concrete admixtures, while reducing the cost of the secondary cement products can increase the amount of cement substitution of the admixtures up to 30% without causing the effect of reducing the heat of hydration and lowering the premature strength. It is an object of the present invention to provide an apparatus for producing a concrete admixture composition mainly containing coal ash. In order to solve the above technical problem, the present invention is a method for producing a concrete admixture composition containing coal ash generated in a thermal power plant as a main component, raw coal ash (raw ash, raw ash) having a moisture content of 15% generated in the thermal power plant Drying step (4) to dry the moisture content within 1%, pulverization (7) classification (8) step to make the dried raw ash into fine ash of a powder degree of 4,000 to 10,000 cm 2 / g, A mixing step (11) for adding and mixing 4-16% of chemically admixture with respect to the pulverized refined ash, and a storage step (9) (12) for storing the concrete admixture of the finished product after the mixing step. Provided is an apparatus for producing a concrete admixture composition containing coal ash as a main component, which includes a coal ash. According to the present invention, it is possible to stably dry and pulverize a raw material ash having a small particle size and light weight, and to classify it in a refinery circuit having a desired moisture content and powdery degree. When used, even if the cement substitution amount is increased up to 30%, the performance of cement secondary products is improved, such as increased fluidity, reduced unit yield, reduced heat of hydration due to reduced cement usage, early strength development, and increased chemical resistance. There is provided an apparatus for producing a concrete admixture composition containing coal ash as a main component, which can express an effect and reduce the production cost of a cement secondary product by reducing the amount of cement used as the amount of cement substitution increases.
Description
본 발명은 시멘트(cement) 관련 기술에 관한 것으로, 특히 콘크리트 혼화재 조성물 제조장치에 관한 것으로, 더욱 상세하게는 석탄회를 주성분으로 하는 콘크리트 혼화재 조성물 제조장치에 관한 것이다.The present invention relates to a cement-related technology, and more particularly, to a concrete admixture composition manufacturing apparatus, and more particularly to a concrete admixture composition manufacturing apparatus mainly comprising coal ash.
일반적으로 석탄회를 콘크리트 혼화재로 사용하기 위한 정제방법 중 현재까지 가장 보편적이고 많이 사용되고 있는 방법으로서는 원심분급에 의한 정제방법이다. 상기 방법은 현재 대부분의 석탄회가 매립되고 있는 실정이므로, 향후 회처리장의 입지확보의 어려움과 자원재활용이라는 환경보호차원에서 폐기 처리되는 석탄회를 재활용할 수 있도록 하기 위해 제안된 방법으로서, 화력발전소에서 발생하는 석탄회 중 전기집진기에 의해 포집된 평균입경 10∼30㎛의 비회(飛灰, fly ash)를 원료회로 사용하여, 원심분급 장치를 통해 원하는 평균분말도를 가진 입자로 분급 후 정제회로 제품화하고 있으며, KS L 5405에서 규정한 정제회의 평균분말도가 2400 ㎠/g 이상인 점을 감안하여, 현재 제품화되고 있는 것은 평균분말도 3,000∼4,000 ㎠/g 정도로 분급된 정제회이다.In general, among the refining methods for using coal ash as concrete admixture, the most common and widely used method is the refining method by centrifugal classification. Since most of the coal ash is currently buried, it is a proposed method for recycling coal ash that has been disposed of in order to protect the location of the ash processing plant and environmental protection such as resource recycling. Fly ash with an average particle diameter of 10 ~ 30㎛ collected by electrostatic precipitator among coal ashes is used as raw material circuit, and it is classified into particles having a desired average powder degree through centrifugal classification device and then commercialized by refining circuit. In view of the fact that the average powder degree of the refined ashes defined in KS L 5405 is 2400 cm 2 / g or more, what is currently commercialized is refined ashes classified as the average powders of about 3,000 to 4,000 cm 2 / g.
그러나 상기의 정제방법으로는 원료회를 정제하고 난 후 잔류하는 폐기회를 역시 전량 폐기하여 매립하고 있는 실정이며, 이러한 폐기회량은 평균분말도 3,000∼4,000 ㎠/g 정도로 정제할 경우는 원료회의 15∼20중량% 이며, 단순히 분급 만으로 분말도를 증가시키는 종래기술로 5,000 ㎠/g 이상의 정제회를 사용하고자 할 경우 폐기회량은 더욱 증가하여 35∼45중량%의 폐기회가 발생하게 되어 재활용율이 급감하게 된다. 또한, 상기 분말도 3,000∼4,000 ㎠/g 로 분급된 정제회를 콘크리트 혼화재로 사용할 경우에도 포졸란 조기활성이 매우 느려 시멘트 2차 제품의 조기압축강도가 저하되는 등 문제점이 발생하여 시멘트 치환량 10%를 넘지 못하고 있으며, 시멘트 치환량을 증가시키기 위하여 여러 방면의 연구가 진행은 되고 있으나 아직 현장적용에는 많은 과제를 안고 있는 실정이다. 특히, 비회(飛灰, fly ash)에 비해 입경이 매우 큰 저회(低灰, bottom ash)는 화력발전소에서 발생하는 석탄회 중 약 20% 에 해당하고 있지만, 국내는 물론 외국에서도 재활용되었던 사례가 없으며 현재까지 어떤 방법의 재활용 기술도 개발되지 않은 채 전량 폐기 처리하여 매립되고 있는 실정에 있다.However, the above refining method is a situation in which the total amount of waste ash remaining after refining the raw ash is also discarded and landfilled, and the amount of such waste ash is refined to about 3,000 to 4,000 cm 2 / g. ~ 20% by weight, if you want to use more than 5,000 cm 2 / g refined ash in the prior art to simply increase the degree of powder only by classification, the waste ash is further increased to generate 35 to 45% by weight of waste ash It will drop sharply. In addition, even when using the refined ash classified as 3,000 ~ 4,000 ㎠ / g of the powder as a concrete admixture, Pozolan early activity is very slow, the early compression strength of the cement secondary product is reduced, resulting in a 10% cement replacement amount In order to increase the amount of cement substitution, various aspects of research have been conducted, but there are still many problems in the field application. In particular, bottom ash, which has a larger particle size than fly ash, accounts for about 20% of coal ash generated from thermal power plants. To date, no method of recycling technology has been developed and landfilled.
본 발명은 산업폐기물로 버려지는 석탄회를 분쇄하여 평균분말도 4,000∼10,000 ㎠/g로 분급된 정제회를 콘크리트 혼화재의 주성분으로 사용하여 시멘트 2차 제품의 원가 상승을 억제하면서 수화열 저감 효과 및 조기강도 저하를 유발하지 않고 혼화재의 시멘트 치환량을 최대 30%까지 증가시킬 수 있는 석탄회를 주성분으로 하는 콘크리트 혼화재 조성물 제조장치를 제공하는데 그 목적이 있다.The present invention uses the refined ash classified as an average powder of 4,000 ~ 10,000 ㎠ / g by crushing the coal ash discarded as industrial waste as the main component of concrete admixture, while reducing the cost of hydration heat and early strength It is an object of the present invention to provide an apparatus for producing a concrete admixture composition containing coal ash as a main component that can increase the cement substitution amount of the admixture up to 30% without causing a decrease.
상기의 기술적 과제를 해결하기 위하여 본 발명은 화력발전소에서 발생하는 석탄회를 주성분으로 하는 콘크리트 혼화재 조성물 제조장치에 있어서, 상기 화력발전소에서 발생하는 수분 함량 15%의 원료석탄회(원료회, raw-ash)를 수분 함량 1% 이내로 건조하는 건조공정(4), 상기 건조된 원료회를 분말도 4,000∼10,000 ㎠/g 의 정제회(fine-ash)로 만들기 위한 분쇄(7)분급(8) 공정, 상기 분쇄분급된 정제회에 대하여 4∼16%의 화학혼화제(additive)를 첨가하여 혼합하는 혼합공정(11), 상기 혼합공정 후 제조 완료된 완제품의 콘크리트 혼화재를 저장하는 저장공정(9)(12)을 포함하는 것을 특징으로 하는 석탄회를 주성분으로 하는 콘크리트 혼화재 조성물 제조장치가 제공된다.In order to solve the above technical problem, the present invention is a concrete admixture composition manufacturing apparatus mainly comprising coal ash generated from a thermal power plant, raw coal ash (raw ash, raw ash) having a moisture content of 15% generated from the thermal power plant Drying step (4) to dry the moisture content within 1%, pulverization (7) classification (8) step to make the dried raw ash into fine ash of a powder degree of 4,000 to 10,000 cm 2 / g, A mixing step (11) for adding and mixing 4-16% of chemically admixture with respect to the pulverized refined ash, and a storage step (9) (12) for storing the concrete admixture of the finished product after the mixing step. Provided is an apparatus for producing a concrete admixture composition containing coal ash as a main component, which includes a coal ash.
이하, 본 발명의 바람직한 실시예를 첨부한 도면에 의거하여 설명하면 다음과 같다.Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.
본 발명에 따른 도 1에 나타낸 것과 같이, 화력발전소에서 발생되어 수집된 저회(低灰, bottom ash)와 비회(飛灰, fly ash)는 원료회로서, 임의로 배출량이 조절 가능한 feed hopper(1)에 저장되었다가 배출되어 임의의 질량계량이 가능한 weighing feeder(2)를 통해 원료별로 정량된 후, 컨베이어에 의해 rotary dryer(4)로 이송되어 건조된다. 상기 건조장치의 구성설비는 burner(3), cyclone(5), bag filter(6)로 구성되어 있으며 중유를 연료로 사용하여 수분 함량 1% 이내로 원료회가 건조된다. rotary dryer(4)에서 건조 완료된 조분말의 원료회는 cyclone(5), bag filter(6) 등에 포집된 미분말의 원료회와 함께 mill(7)로 이송되어 평균분말도 4,000∼10,000 ㎠/g 의 미분말로 분쇄된 후 classifier(8)에 의해 정제회로 분급된다. 임의 분말도를 유지한 정제회는 bag filter(6)에 포집되어 1차 정제회저장부(9)로 이동되고, 굵은 정제회는 다시 mill(7) 입구로 반송되어 원료회와 함께 재분쇄 된다. 1차 정제회저장부(9)의 정제회는 그 자체로도 제품화가 가능하며, 기능성 부여를 위해 다양한 기능의 화학혼화제와 혼합된다. 화학혼화제는 additive hopper(10)로부터 임의의 질량으로 혼합기(11)에 정량 투입되며 1차 정제회저장부(9)로부터 이송된 정제회와 4∼16%의 비율로 혼합된다. 혼합이 완료된 최종제품은 2차 정제회저장부(12)로 이송 저장되어 제품으로 반출된다.As shown in FIG. 1 according to the present invention, the bottom ash and fly ash generated and collected in a coal-fired power plant are raw ashes, and the feed hopper (1), which can arbitrarily adjust the discharge rate After weighing each raw material through a weighing feeder (2), which is stored and discharged to allow any mass measurement, it is transferred to a rotary dryer (4) by a conveyor and dried. The drying equipment is composed of a burner (3), cyclone (5), bag filter (6) and the raw ash is dried to less than 1% moisture content using heavy oil as a fuel. The raw ash of the crude powder dried in the rotary dryer (4) is transferred to the mill (7) together with the raw ash of fine powder collected in cyclone (5), bag filter (6), etc., and the average powder of 4,000 ~ 10,000 ㎠ / g It is pulverized into fine powder and then classified into refiners by a classifier (8). The refined ash, which maintains an arbitrary powderiness, is collected in a bag filter 6 and is moved to the primary refinery ash storage unit 9, and the coarse refined ash is returned to the inlet of the mill 7 to be regrind with the raw ash. . The refinery of the primary refinery ash storage unit 9 can be commercialized on its own, and is mixed with various chemical admixtures to impart functionality. The chemical admixture is metered into the mixer 11 at any mass from the additive hopper 10 and mixed with the refined ash conveyed from the primary refinery ash storage 9 at a rate of 4 to 16%. The final product is mixed is transported to the secondary refinery storage unit 12 is carried out to the product.
상기에 설명한 바와 같이 본 발명에 따른 제조장치에 의해 분쇄분급된 정제회를 콘크리트 혼화재로 사용함에 있어서 시멘트 치환량을 30% 로 증가시켜 사용한 경우, 종래기술에 의해 정제된 정제회에 비해 시멘트 사용량을 12.5∼30%까지 감소시킬 수 있으므로 이에 따른 시멘트 2차 제품의 원가절감 효과로서 콘크리트 1㎥ 당 1,408원∼4,224원의 원가절감 효과를 얻을 수 있으며, 콘크리트의 성능면에 있어서도 7일 강도는 5% 이상, 28일 강도는 10% 이상 크게 향상시킬 수 있고, 저발열 성능으로서 수화열 저감효과는 양생 1일 경과시 2%, 3일 경과시 13% 정도의 수화열 저감효과를 얻을 수 있다.As described above, in the case of using the refined ash refined by the manufacturing apparatus according to the present invention as a concrete admixture to increase the cement replacement amount to 30%, the amount of cement used is 12.5 compared to the refined ash refined by the prior art. As it can be reduced by ~ 30%, cost reduction effect of cement secondary products can be achieved by 1,408 ~ 4,224 won per 1㎥ of concrete, and 7 days strength is more than 5% in terms of concrete performance. In addition, the 28-day strength can be greatly improved by 10% or more, and as a low heat generation performance, the effect of reducing the heat of hydration can be obtained by reducing the heat of hydration of about 2% after 1 day of curing and about 13% after 3 days of curing.
본 발명에 따르면 원료회의 입경에 상관없이 원하는 수분함량 및 분말도를 가진 정제회로 안정하게 건조 및 분쇄분급할 수 있으며, 본 발명에 의해 제조된 정제회를 콘크리트 혼화재로 사용할 경우, 시멘트 치환량을 최대 30%까지 증가시켜도 시멘트 2차 제품의 성능에 있어서, 유동성 증가 및 단위 수량(水量)감소, 시멘트 사용량 감소에 따른 수화열 저감, 조기강도 발현, 화학저항성 증대 등의 성능향상 효과를 발현할 수 있고, 시멘트 치환량 증가에 따라 시멘트 비용이 감소됨으로써 시멘트 2차 제품의 생산원가 절감을 이룰 수 있는 것을 특징으로 하는 석탄회를 주성분으로 하는 콘크리트 혼화재 조성물 제조장치가 제공된다.According to the present invention, regardless of the particle size of the raw ash, it is possible to stably dry and grind the refinery circuit having the desired moisture content and powderiness, and when the refined ash prepared according to the present invention is used as a concrete admixture, the maximum amount of cement replacement is 30. Even if it is increased to%, the performance improvement effect of cement secondary products can be improved by increasing fluidity, decreasing unit water, reducing heat of hydration due to decreasing cement usage, developing early strength, and increasing chemical resistance. There is provided an apparatus for producing a concrete admixture composition based on coal ash, wherein the cement cost is reduced by increasing the substitution amount, thereby reducing production costs of the cement secondary products.
도1은 본 발명에 따른, 석탄회를 주성분으로 하는 콘크리트 혼화재 조성물 제조장치도1 is an apparatus for producing a concrete admixture composition based on coal ash according to the present invention.
삭제delete
〈도면의 주요부분에 대한 부호의 설명〉<Explanation of symbols for main parts of drawing>
1 : feed hopper 2 : weighing feeder 3 : burner 1: feed hopper 2: weighing feeder 3: burner
4 : rotary dryer 5 : cyclone 6 : bag filter 4: rotary dryer 5: cyclone 6: bag filter
7 : tube mill 8 : classifier 9 : bag filter 7: tube mill 8: classifier 9: bag filter
10 : F/A (Ⅰ) silo 11 : additive hopper 12 : mixer10: F / A (I) silo 11: additive hopper 12: mixer
13 : F/A (Ⅱ) silo13: F / A (II) silo
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