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公开(公告)号：EP2733223B1
公开(公告)日：2017-02-22
申请号：EP12814820.2
申请日：2012-07-11
发明人： MURAO, Akinori , FUJIWARA, Daiki , WATAKABE, Shiro
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公开(公告)号：EP2851435A1
公开(公告)日：2015-03-25
申请号：EP13790679.8
申请日：2013-05-17
IPC分类号： C21B5/00
摘要： A method for charging blast furnace raw material into a blast furnace, comprising, when charging blast furnace raw material including coke and ore material such as sinter, pellet, or lump ore into the blast furnace using a rotating chute, forming a central coke layer at a shaft central portion of the blast furnace; and forming a mixed layer of the coke and the ore material on the outside of the central coke layer with a coke mixing ratio varying in a continuous or stepwise manner from the shaft of the blast furnace towards the furnace wall in the blast furnace radial direction. The method ensures gas permeability in the blast furnace, stabilizes blast furnace operations, and improves thermal efficiency even when an operation to blow in a large amount of pulverized coal is performed.
摘要翻译： 1.一种将高炉原料投入高炉的方法，其特征在于，在使用旋转溜槽向高炉内投入含有焦炭和烧结矿，球团矿，块矿等矿石原料的高炉原料时，在高炉中形成中心焦炭层 高炉的轴心部分; 以及在中心焦炭层的外侧形成焦炭和矿石材料的混合层，其焦炭混合比从高炉炉身轴向炉壁沿高炉径向连续或逐步地变化。 该方法确保了高炉中的气体渗透性，使高炉操作稳定，并且即使在进行大量粉煤吹入操作时也提高了热效率。
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公开(公告)号：EP2796565A1
公开(公告)日：2014-10-29
申请号：EP12859458.7
申请日：2012-03-01
发明人： MURAO, Akinori , FUJIWARA, Daiki , WATAKABE, Shiro
CPC分类号： C21B5/003 , C21B7/163 , C21B2005/005
摘要： Each lance 4 for injecting a fuel through a tuyere 3 is a double tube. Pulverized coal is injected through an inner tube of each of two double wall lances 4. Oxygen is injected through an outer tube of each of the two double wall lances 4. The concentration of oxygen in a gas composed of a carrier gas for the pulverized coal and a gas injected through the outer tubes is 35% by volume or more. Even in an operation using pulverized coal having a volatile matter content of 25 mass% or less at a high pulverized coal ratio of 150 kg/t or more, the combustion temperature can be increased, and consequently CO 2 emissions can be reduced. At a pulverized coal ratio of 170 kg/t or more, the oxygen concentration is less than 70% by volume. The concentration of pulverized coal flows injected through the two double wall lances 4 can be prevented by placing the double wall lances 4 such that the pulverized coal flows do not overlap each other. This ensures high combustion efficiency.
摘要翻译： 用于通过风口3喷射燃料的喷枪4是双管。 粉碎的煤通过两个双壁喷枪4的内管注入。氧气通过两个双壁喷枪4中的每一个的外管注入。由用于粉煤的载气组成的气体中的氧浓度 通过外管喷射的气体为35体积％以上。 即使在高粉煤比为150kg / t以上的挥发物含量为25质量％以下的粉煤的操作中，也能够提高燃烧温度，能够降低CO 2排放。 在粉煤比为170kg / t以上的情况下，氧浓度小于70体积％。 通过将双壁喷枪4放置成使粉煤流不彼此重叠，可以防止通过两个双壁喷枪4喷射的粉煤流的浓度。 这确保了高燃烧效率。
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公开(公告)号：EP2796566B1
公开(公告)日：2018-08-29
申请号：EP12860851.0
申请日：2012-03-01
发明人： FUJIWARA, Daiki , MURAO, Akinori , WATAKABE, Shiro
摘要： A lance 4 for injecting a fuel through a tuyere 3 is a double tube. Pulverized coal is injected through an inner tube 21 of the double wall lance 4. Oxygen is injected through an outer tube 22 of the double wall lance 4. Notches 23 are formed in a injecting front end of the inner tube 21 of the double wall lance 4. The concentration of oxygen in a gas composed of a carrier gas for the pulverized coal and a gas injected through the outer tube is 35% by volume or more. Even in an operation using pulverized coal having a volatile matter content of 25 mass% or less at a high pulverized coal ratio of 150 kg/t or more, the combustion temperature can be increased, and consequently CO 2 emissions can be reduced. The specific oxygen consumption can be suppressed by decreasing the oxygen concentration to less than 70% by volume. The notches 23 may be circumferentially evenly spaced in the inner tube 21 of the double wall lance 4 and further improve combustion efficiency.
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公开(公告)号：EP2733224B1
公开(公告)日：2017-02-15
申请号：EP12815299.8
申请日：2012-07-11
发明人： FUJIWARA, Daiki , MURAO, Akinori , WATAKABE, Shiro
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公开(公告)号：EP2851436B1
公开(公告)日：2016-09-14
申请号：EP13790736.6
申请日：2013-05-17
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公开(公告)号：EP2851438A1
公开(公告)日：2015-03-25
申请号：EP13791652.4
申请日：2013-05-16
摘要： A method according to the present invention for charging blast furnace raw material into a blast furnace includes classifying coke into lump coke and small coke and filling furnace top bunkers with the classified coke, classifying ore material into large ore material and small ore material and filling the furnace top bunkers with the classified ore material, and subsequently simultaneously discharging the large ore material when discharging the lump coke and simultaneously discharging the small ore material when discharging the small coke. It is thus possible to ensure gas permeability in the blast furnace, stabilize blast furnace operations, and improve thermal efficiency even when mixing a large amount of coke.
摘要翻译： 根据本发明的用于将高炉原料装入高炉的方法包括将焦炭分类为块状焦炭和小焦炭并用分级焦炭填充炉顶料仓，将矿石材料分类为大矿石材料和小矿石材料并填充 炉顶料仓与分级矿料进行分离，随后在排放块状焦炭时同时排出大型矿石材料，并在排放小型焦炭时同时排出小型矿石材料。 因此，即使在混合大量的焦炭时，也能够确保高炉内的透气性，使高炉操作稳定，并且能够提高热效率。
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公开(公告)号：EP2851437A1
公开(公告)日：2015-03-25
申请号：EP13791416.4
申请日：2013-05-17
IPC分类号： C21B5/00
摘要： According to the present invention, by setting the average layer thickness L av1 at each rotation of the rotating chute, calculated by Expression 1, to be smaller than the thickness h of coke charged into the shaft central portion of the blast furnace, it is possible to provide a method for charging raw material into a blast furnace that ensures gas permeability in the blast furnace, stabilizes blast furnace operations, and improves thermal efficiency even when the amount of coke is small, or an operation to blow in a large amount of pulverized coal is performed. Expression 1 is L av1 = V n /((R n 2 -R n-1 2 )π), where V n is the charged raw material volume (m 3 ) per rotation at the n th rotation, and R n is the falling radius (m) of charged raw material at the n th rotation.
摘要翻译： 根据本发明，通过将由式1算出的旋转滑槽的每次旋转时的平均层厚Lav1设定为比填充到高炉的轴中心部的焦炭的厚度h小， 提供一种将原料装入鼓风炉的方法，该方法确保鼓风炉内的透气性，使高炉操作稳定，并且即使当焦炭量小时也提高热效率，或者提供吹入大量粉煤的操作 被执行。 表达式1是Lav1 = Vn /（（Rn2-Rn-12）π），其中Vn是在第n次旋转时每转的装入原材料体积（m3），Rn是装入的原材料的下落半径（m） 第n次旋转。
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公开(公告)号：EP2733223A1
公开(公告)日：2014-05-21
申请号：EP12814820.2
申请日：2012-07-11
发明人： MURAO, Akinori , FUJIWARA, Daiki , WATAKABE, Shiro
摘要： A method for operating a blast furnace that makes it possible to further increase combustion temperature and reduce a unit consumption of reducing agent is provided. When two or more lances for injecting reducing agents from a tuyere are used, and LNG is used as a flammable reducing agent and pulverized coal is used as a solid reducing agent, a position of an end of the lance for injecting LNG is situated closer to a near side in a injecting direction by more than 0 to 50 mm than a position of an end of the lance for injecting pulverized coal. By this, the LNG effectively raises the temperature of the pulverized coal. The LNG contacts oxygen and undergoes combustion earlier, so that explosive diffusion occurs and the temperature of the pulverized coal is drastically increased. This makes it possible to drastically increase the combustion temperature and, thus, to reduce the unit consumption of reducing agent. In addition, when a double wall lance is used as a lance for injecting pulverized coal, the pulverized coal is injected from the inner tube and oxygen is injected from the outer tube, so that it is possible to provide oxygen necessary to the combustion of the pulverized coal and to further increase combustibility. The outlet flow velocity at the lance is 20 to 120 m/sec to prevent deformation of the lance.
摘要翻译： 提供一种操作高炉的方法，其使得可以进一步提高燃烧温度并减少还原剂的单位消耗。 当使用用于从风口喷射还原剂的两个或更多个喷枪，并且使用LNG作为可燃性还原剂，并且将粉煤用作固体还原剂时，用于喷射LNG的喷枪的端部的位置位于更接近 在喷射方向上的近侧比用于注入粉煤的喷枪的端部的位置大大超过0至50mm。 由此，LNG有效地提高了粉煤的温度。 液化天然气与氧气接触并较早地进行燃烧，从而爆炸扩散，粉煤的温度急剧上升。 这使得可以显着增加燃烧温度，从而降低还原剂的单位消耗。 此外，当使用双壁喷枪作为喷射煤粉的喷枪时，从内管注入粉煤，并从外管注入氧气，从而可以提供燃烧所需的氧气 粉煤并进一步增加可燃性。 喷枪出口流速为20〜120m / sec，防止喷枪变形。
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公开(公告)号：EP2653565A1
公开(公告)日：2013-10-23
申请号：EP11856543.1
申请日：2011-07-15
CPC分类号： C21B5/06 , C21B5/003 , C21B7/163 , C21B2005/005 , C21B2100/26 , C21B2100/60 , Y02P10/283
摘要： Provided is a method for operating a blast furnace in which further improvement in combustion temperature and further reduction of the specific consumption of reducing agents are possible. By injecting all of pulverized coal (PC: solid reducing agent), a utility gas (inflammable reducing agent) and O 2 (combustion improving gas) so that each of these are separately injected thorough any one of the inner tube lance, the intermediate tube lance and the outer tube lance which constitute a triple tube lance, there is, for example, an explosive diffusion of the pulverized coal caused by the O 2 and the utility gas burning in first and, at the same time, there is a significant increase in the temperature of the pulverized coal due to the combustion heat of the utility gas, which results in an increase in the heating rate of the pulverized coal and a significant improvement in the combustion temperature, which makes it possible to decrease the specific consumption of the reducing agents. In addition, by injecting some of oxygen to be added to a injected air through the triple tube lance, the excessive supply of oxygen to be used can be avoided and the specific consumption of O 2 can be decreased while gas balance in a blast furnace is maintained.
摘要翻译： 本发明提供一种高炉的运转方法，能够进一步提高燃烧温度，并且能够进一步降低还原剂的比耗。 通过将所有粉煤（PC：固体还原剂），商用气体（可燃性还原剂）和O2（燃烧改善气体）全部注入，使得这些气体分别通过内管喷枪，中间管喷枪 和构成三管喷枪的外管矛杆，例如，首先由O2和公用燃气引起的煤粉的爆炸性扩散，同时， 由于煤气的燃烧热导致粉煤的温度升高，这导致煤粉的加热速率增加并且燃烧温度显着提高，这使得可以减少还原剂的比耗 。 另外，通过从三重管喷枪喷射注入的空气中的一些氧气，可以避免所使用的氧气的过量供应，并且可以在维持高炉中的气体平衡的同时降低O2的比耗量 。
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