WO2015137737A1 - 우분을 포함하는 제선용 미분탄 및 이를 이용한 선철 제조방법 - Google Patents
우분을 포함하는 제선용 미분탄 및 이를 이용한 선철 제조방법 Download PDFInfo
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- WO2015137737A1 WO2015137737A1 PCT/KR2015/002377 KR2015002377W WO2015137737A1 WO 2015137737 A1 WO2015137737 A1 WO 2015137737A1 KR 2015002377 W KR2015002377 W KR 2015002377W WO 2015137737 A1 WO2015137737 A1 WO 2015137737A1
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- pulverized coal
- powder
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/42—Solid fuels essentially based on materials of non-mineral origin on animal substances or products obtained therefrom, e.g. manure
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/04—Raw material of mineral origin to be used; Pretreatment thereof
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/02—Solid fuels such as briquettes consisting mainly of carbonaceous materials of mineral or non-mineral origin
- C10L5/34—Other details of the shaped fuels, e.g. briquettes
- C10L5/36—Shape
- C10L5/366—Powders
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- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
-
- 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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
Definitions
- the present invention relates to pulverized coal briquettes containing a powder and a method for producing pig iron using the same, more specifically, the pulverized coal for pulverized coal comprising a powder that can improve the combustibility and improve the efficiency and stability of blast furnace operation and pig iron using the same It relates to a manufacturing method.
- Steelmaking is the process of melting iron ore to make pig iron. After charging iron ore, coke and limestone in a blast furnace or blast furnace, the hot air of 1100 ⁇ 1300 °C is blown to burn coke to melt and reduce iron ore to melt iron contained in iron ore. The iron coming out is called pig iron.
- Coke is a raw material coal (coal) in a furnace and baked at a high temperature of about 1,000 ⁇ 1,300 °C, a heat source for melting iron ore, a compound of iron and oxygen in the blast furnace, as well as a reducing agent that separates iron from iron ore. Do it.
- blast furnace operation for steelmaking has enabled significant cost reduction by injecting pulverized coal at the lower blast furnace level in an operation that used a large amount of coke, which is expensive to manufacture due to technology development.
- the coke supports the reducing agent, the heat source and the charges in the blast furnace to ensure ventilation.
- Pulverized coal blows very fine particles at the tuyere level and induces combustion early within a few milliseconds, acting as a reducing agent and a heat source.
- Embodiments of the present invention to provide a pulverized coal for steelmaking comprising a powder.
- embodiments of the present invention to provide a method for manufacturing pig iron using fine pulverized coal containing a powder.
- a pulverized coal for grinding comprising less than 76 parts by weight of dried powder pulverized powder at 50mm or less and water content 20% or less with respect to 100 parts by weight of coal powder.
- the first step of drying the milk powder A second step of crushing the dry milk powder in a crusher; A third step of mixing fine powder with coal powder to produce pulverized coal; And a fourth step of blowing the pulverized coal into a blast furnace or blast furnace.
- the manure when utilizing the livestock waste, the manure is useful in terms of environment by recycling the livestock waste.
- the generation of reducing gas is easy, it is possible to high-speed reduction of iron ore.
- 1 is a view showing the results of comparing the combustibility of the pulverized coal according to the replacement ratio of the pulverized coal including the pulverized coal according to an embodiment of the present invention.
- Figure 2 is a view comparing the burnability of each coal type of pulverized coal including the powder according to an embodiment of the present invention.
- Figure 3 is a comparison of the calorific value of combustion according to the replacement ratio of the pulverized coal including the powder according to an embodiment of the present invention.
- FIG 4 is a view showing a change in the Bosch gas volume (Bosh gas volume) according to the replacement ratio of the powdered pulverized coal including the powder according to an embodiment of the present invention.
- FIG 5 is a view showing a change in the slag volume (slag volume) according to the replacement ratio of pulverized coal including the powder according to an embodiment of the present invention.
- FIG. 6 is a view showing the blowing index of milk powder according to an embodiment of the present invention.
- Figure 7a is a view showing the particle shape of the conventional pulverized coal
- Figure 7b is a view showing the particle shape of the powder according to an embodiment of the present invention.
- FIG. 8 is a view showing a method for producing pig iron using fine pulverized coal containing iron powder according to another embodiment of the present invention.
- first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another.
- the present invention provides a pulverized pulverized coal comprising less than 76 parts by weight of dried crushed powder to 50 mm by weight and water content of 20% or less with respect to 100 parts by weight of coal powder.
- the manure used as a substitute for coal basically contains a large amount of volatile matter, and thus shows a relatively low fixed carbon compared with coal, and the calorific value shows a level of 50% of the existing coal.
- the volatilized milk powder has the characteristics of early pyrolysis and high concentration of oxygen compared to carbon, and thus it can be used as an additive to promote combustion of existing carbon (see Table 1). Further, as shown in Table 2, milk powder has an advantage that it can be used continuously in the blast furnace because the generation amount is remarkably large and easy to supply and receive.
- the existing manure is mostly used for composting, etc., but the production amount is significantly higher than the amount used has been difficult to process in many livestock farms. Therefore, by applying the manure treated as livestock waste in the present invention in the blast furnace operation can be significantly contributed to not only environmental problems but also cost reduction.
- the combustibility of the pulverized coal when the pulverized coal is utilized for pulverized coal, the combustibility of the pulverized coal can be remarkably improved. 1 is a comparison of the combustibility of the pulverized coal according to the replacement ratio of the powder, it can be seen that the combustion performance is improved up to 98.4% when combustion is performed by gradually replacing the pulverized coal with the powder (see FIG. 1). In particular, the present invention is very excellent in the combustibility improvement effect of the low quality pulverized coal.
- Low quality pulverized coal has a low combustion efficiency, thus forming a large amount of unburned char, and accumulating omnidirectionally inside the blast furnace, thereby adversely affecting the blast furnace's air permeability and liquidity by blocking pores between the cokes.
- coke differentiation is also significant at the level of the blast furnace.
- the unburned char has a relatively wide reaction interface, so that combustion is relatively quicker than that of finely divided coke. Will be inhibited. Therefore, according to the present invention, it is possible to improve the combustion efficiency of low quality pulverized coal and solve the problem of using low quality pulverized coal and induce stable blast furnace operation.
- the calorific value of the pulverized coal is also related to the accumulation of fines in the blast furnace, but the combustion efficiency has a significant effect on the initial heat generation effect of pulverized coal. Therefore, in order to more closely compare the combustibility improvement effect and the initial calorific value change due to such a manure, the calorific value change according to the manure ratio for each type of coal dust is shown in FIG. 3. As a result, in the case of pulverized coal containing burning powder, the initial calorific value was continuously increased up to 30% as the burning ratio increased due to the greatly improved burning property.
- the pulverized coal preferably contains 76 parts by weight or less of powdered milk based on 100 parts by weight of coal powder.
- a part of the pulverized coal is replaced with a powder, there may be a concern that the high volatility of the powder may increase the Bosch gas volume (BGV) and thereby increase the blast furnace pressure. If the blast furnace pressure rises, it may be difficult to ensure smooth breathability and stable blast furnace operation. Therefore, for stable blast furnace operation preferably contains less than 76 parts by weight of milk powder per 100 parts by weight of coal powder (see Fig. 4). When containing more than 76 parts by weight of milk powder per 100 parts by weight of coal powder as an example of the control gas volume, it is difficult to maintain less than about 10,800 N m3 / min.
- the weight part of the milk powder is represented by converting the milk powder replacement ratio for the coal powder shown in FIG. That is, the replacement ratio of manure for coal powder is included as 43% or less (see Fig. 4).
- the crushed powder is not limited thereto, but preferably has a particle size of 50 mm or less. If the particle size of the manure exceeds 50mm, it takes a lot of energy to dry the manure and there is difficulty in uniform mixing with coal powder.
- the pulverized coal including the powder according to the present invention may further include various components added to ordinary pulverized coal in addition to coal powder and powder.
- the person skilled in the art to which the present invention pertains does not have any difficulty in properly adding additional components according to the blast furnace operating conditions.
- the powder is illustrated as a component to be blended in coal dust
- the idea of the present invention can be extended to the manure of other livestock, such as dogs, pigs, goats, horses as well as milk powder.
- the present invention comprises a first step of drying the milk powder; A second step of crushing the dry milk powder in a crusher; A third step of mixing fine powder with coal powder to produce pulverized coal; And it provides a pig iron manufacturing method comprising a fourth step of blowing the pulverized coal into a blast furnace or blast furnace.
- the milk powder drying is the first natural drying in the yard so that the moisture content is 65% or less under the condition that the fermentation does not occur in the first step, and the crushed milk powder through the crusher of the second step It can be put into a drier and secondaryly dried to have a water content of 20% or less.
- the cost of drying can be reduced.
- the wet powder drying yard is sufficient to have a roofing equipment that can prevent the inflow of water in the rain, it is possible to reduce the cost of the dryer equipment, which is relatively expensive.
- after the primary powder is pulverized in the crusher after the first drying may be added to the dryer can further improve the drying efficiency.
- the milk powder having a particle size of 50 mm or less is transferred directly to a dryer by passing the particle size sorter before the crusher of the second stage is fed, and the milk powder has a particle size of 50 mm or less in the crusher of the second stage. Shred. As described above, if the milk powder having a particle size of 50 mm or less is directly transferred to the dryer through a particle size sorter before the crusher is introduced, the crushing efficiency can be improved.
- the dryer may utilize waste heat of the steelmaking process including the existing blast furnace, or blast furnace gas, coke gas, converter gas, etc. may be heated by using the by-product gas. Therefore, according to the present invention, by using the waste heat or by-product gas generated in the pig iron manufacturing process can dry the powdered milk can reduce the amount of coal while minimizing additional costs.
- Biomass which is considered as a substitute for coal, basically contains a large amount of volatile matter, which shows that the fixed carbon is considerably lower than that of coal. In particular, the calorific value represents 50% of existing coal.
- the volatilization of biomass has the characteristics of early pyrolysis and a large amount of oxygen compared to carbon, and thus it may be used as an additive to promote the combustion of existing pulverized coal. Table 1 below shows the characteristics of the main biomass and pulverized coal (coal).
- ad air-dried bases
- daf dry ash free basis (percentage of elements excluding Ash)
- IM inherent moisture
- VM volatile matter
- FC fixed carbon
- H hydrogen
- S sulfur
- O oxygen
- PKS palm kernel shell
- YQ0 Yanquan
- ZH0 Zhaozhuang
- cow powder is preferable as a coal substitute.
- the manure has an advantage that it can be used continuously in the blast furnace because the amount of generation is remarkably large and easy to obtain.
- domestic production of manure is estimated at 23,291,745 tons per year.
- About 85% of the manure contains moisture and is estimated to be 3,493,780 tons per year even after complete drying.
- Table 2 below shows the domestic manure generation.
- the existing manure is mostly used for composting, etc., but the production amount is significantly higher than the amount used has been difficult to process in many livestock farms. Therefore, by applying the manure treated as livestock waste in the present invention in the blast furnace operation can be significantly contributed to not only environmental problems but also cost reduction.
- FIG. 1 compares the combustibility of pulverized coals according to the replacement ratio of crushed powder.
- YQ0 shows a combustion rate of 65.1%
- CUP of 51.3%
- YQ0 shows relatively good combustibility.
- ZH0 and CUP showed significantly lower combustion characteristics.
- the combustibility of pulverized coal is also related to the accumulation of fines in the blast furnace, but the combustion efficiency has a significant effect on the initial heat generation effect of pulverized coal. For example, if the combustion rate of YQ0 pulverized coal having a calorific value of 7,665 Kcal / kg is 65.1%, the primary calorific value is only 4,990 Kcal / kg, which is disadvantageous for high efficiency operation. Therefore, in order to more closely compare the combustibility improvement effect and the initial calorific value change due to such a manure, the calorific value change according to the manure ratio for each type of coal dust is shown in FIG. 3.
- ZH0 and CUP which had low combustibility, showed a steady increase in initial calorific value up to 30% as the milk ratio increased due to the significantly improved combustibility when replacing the manure.
- the initial calorific value was steadily decreased to 25% of the cow's milk ratio despite the improvement of the cow's combustibility. This is because YQ0 had a certain level of initial calorific value compared to the other two types of pulverized coal and was affected by the low calorific value (3,742 Kcal / kg) of the manure as the manure was added.
- BGV bovine gas volume
- PCR pulverized coal ratio
- Pulverized blast furnace slag according to the replacement of manure at the operating conditions of air volume 7,000Nm3 / min, humidity 25g / Nm3, oxygen load 32,100Nm3 / min and pulverized coal ratio (PCR) 165kg / thm Volume changes were compared and the results are shown in FIG. 5.
- YQ0 showed 302kg / thm
- ZHO showed 303kg / thm and CUP 300kg / thm
- 310kg / thm even at 100% of cow's milk ratio. 5).
- the management standard since the management standard is likely to be more strictly changed in the future, in order to stably operate the blast furnace, it is preferable to set the cow's milk ratio to 43% or less.
- Blownability is an index indicating whether the pulverized coal can be easily blown into the blast furnace when transferring the pulverized pulverized coal to the blast furnace through a plurality of pipes. Blownability may be influenced by factors such as frictional force and resistance between the pulverized coal and the inner wall of the pipe. As shown in FIG. 6, the blowability index of the manure has a lower value of about 1/3 or less than that of pulverized coal such as YQ0, CUP, and YB0, and thus, in the case of manure, it exhibits relatively excellent transport characteristics. On the other hand, 0.35, which is a standard of the manageability of the index of inhalation shown, may vary depending on future operating conditions.
- FIG. 7A illustrates a post-combustion particle shape of a conventional YQ0 coal
- FIG. 7B illustrates a post-combustion particle shape of a milk powder according to an embodiment of the present invention.
- the YQ0 coal has a relatively high combustion rate compared to other conventional pulverized coal, but the fine shape of the particles is shown as an irregular shape.
- the manure In contrast, in the case of the manure, it has a relatively spherical particle shape compared to YQ0, which means that the spherical shape has a complete combustion characteristics.
- This embodiment shows a method of applying the powder in the co-blowing method to the pulverized coal blowing process using the existing coal. According to this embodiment, there is an advantage that can be easily applied by adding a minimum of facilities to the pig iron manufacturing process for blowing the existing pulverized coal.
- the first drying was performed to make the milk powder 110 at least 85% or less in the yard.
- the dry powder yard is sufficient to have a roof that can prevent the inflow of water in the rain.
- the naturally dried milk powder 110 was stored in the milk powder storage hopper 120 and then crushed to have a particle size of 50 mm or less through the rough crusher 140.
- the particle size sorter 130 is installed in the lower portion of the milk powder storage hopper 120 so that the milk powder having a particle size of 50 mm or less can be transferred directly to the dryer 150 without passing through the crude crusher 140. The crushing efficiency can be increased.
- the dryer 150 removes moisture by allowing the temperature to be at least 100 ° C.
- the drying heat is an indirect heating method using waste heat of the existing blast furnace and other steelmaking processes or by-product gas such as blast furnace gas, coke gas, and converter gas. Was adopted.
- the collected manure is 20% of the moisture level, the above-described process may be omitted and the existing coal-only process may be used directly.
- the dried milk powder was first stored in a milk powder storage silo (silo, 160), quantitatively cut out according to a desired blending ratio from the bottom of the silo, and added to the mixed coal storage hopper 20.
- the drying of the milk powder 110 may be performed at a water content of 20% or less in a natural state.
- the naturally dried milk powder 110 at a moisture content of 20% or less may be crushed so as to have a particle size of 50 mm or less through the rough crusher 140 after being stored in the milk powder storage hopper 120.
- the crushed milk powder 110 so as to have a particle size of 50 mm or less may be stored in the milk powder storage silo 160.
- the particle size sorter 130 installed below the milk powder storage hopper 120 the milk powder determined to have a particle size of 50 mm may be transferred to the milk powder storage silo 160 without passing through the coarse crusher 140.
- the fine powder 110 was blown at the blast furnace 80 airflow level through the pulverized coal blowing hopper 70 through the above-described fine coal blowing process.
- the manure when utilizing the livestock waste, the manure is useful in terms of environment by recycling the livestock waste.
- the generation of reducing gas is easy, it is possible to high-speed reduction of iron ore.
- the powder is illustrated as a component to be blended in coal dust
- the idea of the present invention can be extended to the manure of other livestock, such as dogs, pigs, goats, horses as well as milk powder.
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Abstract
Description
구분 | 공업분석(ad, %) | 원소분석(daf, %) | 발열량(kcal/kg) | ||||||||
IM | Ash | VM | FC | C | H | N | S | O | |||
바이오매스 | 우분 | 2.60 | 20.30 | 66.19 | 10.91 | 54.07 | 7.86 | 1.86 | 0.22 | 35.99 | 3742 |
왕겨 | 4.65 | 10.70 | 73.6 | 11.05 | 52.72 | 7.48 | 0.29 | 0.12 | 39.39 | 4093 | |
볏짚 | 4.65 | 12.40 | 70.7 | 12.25 | 50.23 | 5.72 | 0.16 | 0.13 | 43.76 | 3711 | |
PKS | 2.45 | 1.70 | 79.35 | 16.50 | 55.98 | 6.23 | 0.13 | 0.41 | 37.25 | 4947 | |
석탄 | YQ0 | 1.02 | 9.97 | 10.08 | 78.93 | 93.44 | 4.01 | 1.26 | 0.47 | 14.03 | 7665 |
ZH0 | 0.97 | 10.45 | 9.36 | 79.21 | 92.16 | 3.81 | 1.52 | 0.46 | 16.04 | 7583 | |
CUP | 1.01 | 9.30 | 18.78 | 70.91 | 91.11 | 4.68 | 1.8 | 0.45 | 8.51 | 7701 |
한우 | 젖소 | 일 발생량(t/d) | 습식 총계(t/d) | 건식 총계(t/d) | |||
두수 | 축사수 | 두수 | 축사수 | 한우 | 젖소 | ||
3,058,601 | 146,930 | 420,113 | 6,00777 | 44,656 | 19,157 | 23,291,745 | 3,493,780 |
Claims (6)
- 석탄가루 100 중량부에 대하여, 함수율 20% 이하로 건조되어 파쇄된 우분을 76 중량부 이하로 포함하는 제선용 미분탄.
- 제1항에 있어서, 상기 파쇄된 우분은 50mm 이하의 입도를 갖는 제선용 미분탄.
- 우분을 건조하는 제1단계;상기 건조한 우분을 파쇄기에서 파쇄하는 제2단계;상기 우분을 석탄 가루와 혼합하여 미분탄을 제조하는 제3단계; 및상기 미분탄을 용광로 또는 고로에 취입하는 제4단계를 포함하는 선철 제조방법.
- 제3항에 있어서, 상기 미분탄은 석탄가루 100 중량부에 대하여 함수율 20% 이하로 건조되어 파쇄된 우분을 76 중량부 이하로 포함하는 선철 제조방법.
- 제3항에 있어서, 상기 우분은 함수율 20% 이하가 되도록 건조되는 선철 제조방법.
- 제5항에 있어서, 상기 제2단계의 파쇄기 투입 전에 입도선별기를 거치도록 하여 입도가 50mm 이하인 우분은 건조기로 바로 이송하고, 상기 제2단계의 파쇄기에서는 상기 우분이 50mm 이하의 입도를 갖도록 파쇄하는 선철 제조방법.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP15761078.3A EP3118283B1 (en) | 2014-03-11 | 2015-03-11 | Pulverized coal for pig-iron making comprising cow manure, and pig-iron production method using same |
CN201580013058.2A CN106103666A (zh) | 2014-03-11 | 2015-03-11 | 用于生铁炼制的包含牛粪的粉煤和使用该粉煤制备生铁的方法 |
JP2016573451A JP6336628B2 (ja) | 2014-03-11 | 2015-03-11 | 牛糞を含む製銑用微粉炭およびこれを用いた銑鉄の製造方法 |
US15/124,784 US20170211160A1 (en) | 2014-03-11 | 2015-03-11 | Pulverized coal for pig-iron making comprising cow manure, and pig-iron production method using same |
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KR10-2014-0028554 | 2014-03-11 | ||
KR20140028554 | 2014-03-11 | ||
KR10-2015-0034093 | 2015-03-11 | ||
KR1020150034093A KR101581633B1 (ko) | 2014-03-11 | 2015-03-11 | 우분을 포함하는 제선용 미분탄 및 이를 이용한 선철 제조방법 |
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Citations (4)
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JP2010037420A (ja) * | 2008-08-04 | 2010-02-18 | Nippon Steel Engineering Co Ltd | 廃棄物溶融炉用コークスの製造方法およびその製造装置ならびに廃棄物溶融炉用コークスを利用した廃棄物溶融処理方法 |
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KR20120069766A (ko) * | 2009-10-29 | 2012-06-28 | 제이에프이 스틸 가부시키가이샤 | 고로 조업 방법 |
KR20130134275A (ko) * | 2012-05-30 | 2013-12-10 | (주)비케이 | 새로운 축분 또는 축분슬러지를 이용한 고열량의 축분탄 및 그 제조방법 |
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KR20130134275A (ko) * | 2012-05-30 | 2013-12-10 | (주)비케이 | 새로운 축분 또는 축분슬러지를 이용한 고열량의 축분탄 및 그 제조방법 |
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