EP2543716B1 - Process for producing ferro coke for metallurgy - Google Patents
Process for producing ferro coke for metallurgy Download PDFInfo
- Publication number
- EP2543716B1 EP2543716B1 EP11750576.8A EP11750576A EP2543716B1 EP 2543716 B1 EP2543716 B1 EP 2543716B1 EP 11750576 A EP11750576 A EP 11750576A EP 2543716 B1 EP2543716 B1 EP 2543716B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- ferrocoke
- briquette
- temperature
- carbonization
- coke
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/08—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form in the form of briquettes, lumps and the like
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/04—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition
- C10B57/06—Other carbonising or coking processes; Features of destructive distillation processes in general using charges of special composition containing additives
-
- 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
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/007—Conditions of the cokes or characterised by the cokes used
-
- 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
- C22B1/24—Binding; Briquetting ; Granulating
- C22B1/242—Binding; Briquetting ; Granulating with binders
- C22B1/244—Binding; Briquetting ; Granulating with binders organic
- C22B1/245—Binding; Briquetting ; Granulating with binders organic with carbonaceous material for the production of coked agglomerates
Definitions
- the present invention relates to a metallurgical ferrocoke manufacturing method of manufacturing ferrocoke by briquetting a carbonaceous material and iron ore and carbonizing the briquette.
- Non-Patent Literature 1 To decrease a reducing agent ratio in a blast furnace, it is effective to decrease a thermal reserve zone temperature generated in the blast furnace (for example, see Non-Patent Literature 1).
- An example of a method of decreasing the thermal reserve zone temperature is a method of decreasing a starting temperature of a gasification reaction (endothermic reaction) of coke expressed by equation (1) below.
- Ferrocoke manufactured by carbonization of a briquette obtained by mixing and briquetting a carbonaceous material (coal) and iron ore is able to increase CO 2 reactivity of coke in ferrocoke due to a catalytic effect of reduced iron ore, and to decrease a reducing agent ratio due to a decrease in a thermal reserve zone temperature following the increase in the CO 2 reactivity (for example, refer to Patent Literature 1).
- Patent Literature 1 Japanese Laid-open Patent Publication No. 2006-28594
- the invention has been made in view of the above problems, and its object is to provide a metallurgical ferrocoke manufacturing method by which, when manufacturing ferrocoke by carbonizing a mixture of a carbonaceous material and iron ore, CO 2 reactivity of coke in ferrocoke inside a blast furnace is increased, thereby enabling a decrease in a thermal reserve zone temperature and a decrease in a reducing agent ratio.
- the present invention is a metallurgical ferrocoke manufacturing method of manufacturing ferrocoke by briquetting a mixture of a carbonaceous material and iron ore to form a briquette and carbonizing the briquette, and is characterized in that a maximum temperature of ferrocoke during the carbonization is in a range of 800°C or higher and 900°C or lower.
- the maximum temperature of the ferrocoke during the carbonization is preferably in a range of 800°C or higher and 850°C or lower.
- the particle diameter of the ferrocoke is in a range of 15 mm or greater and 28 mm or less.
- the ferrocoke preferably has an iron content in a range of 5 mass% or greater and 40 mass% or less and more preferably in a range of 10 mass% or greater and 40 mass% or less.
- the carbonization of the briquette is performed in a vertical furnace and a furnace top gas of the vertical furnace is used as a gas that heats up the briquette.
- the furnace top gas includes carbon monoxide, carbon dioxide, hydrogen, methane, and nitrogen.
- the gas that heats up the briquette desirably includes at least two components selected from a group consisting of carbon monoxide, carbon dioxide, hydrogen, methane, and nitrogen.
- ferrocoke having high CO 2 reactivity in a blast furnace is able to be manufactured, and a reducing agent ratio in the blast furnace is able to be decreased due to a decrease in a thermal reserve zone temperature. Further, according to the preset invention, a carbonization temperature is not increased by what is more than necessary when ferrocoke is manufactured, and thus contribution to adjustment of a necessary amount of heat is achievable.
- ferrocoke used in blast furnace operations which is manufactured by carbonizing a briquette obtained by briquetting a mixture of a carbonaceous material and iron ore
- a method of manufacturing ferrocoke was studied in order to increase CO 2 reactivity of coke in ferrocoke, and the following considerations were made.
- Ferrocoke was manufactured by carbonizing, in a batch-type pressurized carbonization furnace, a briquette (briquette) obtained by briquetting a mixture of coal and iron ore (70 mass% of coal; and 10, 20, 30, and 40 mass% of iron ore) using a briquette machine.
- a shape of the briquette is illustrated in FIG. 1 .
- L is 30 mm
- B is 25 mm
- T is 18 mm.
- L represents the length
- B represents the breadth
- T represents the thickness
- a representative particle diameter of ferrocoke is represented by (length ⁇ breadth ⁇ thickness) 1/3 , that is, (L ⁇ B ⁇ T) 1/3 .
- ferrocoke carbonization temperatures were 800°C, 850°C and 900°C.
- a ferrocoke carbonization temperature is the maximum temperature during the carbonization, and is obtained by measuring a temperature at a central portion of the briquette. Temperature was increased up to this maximum temperature at 5°C/min, and maintained at the maximum temperature for 90 minutes.
- An atmosphere was a mixed gas of 30% of hydrogen, 11% of carbon monoxide, 17% of carbon dioxide, 21% of nitrogen, 5% of water vapor, and 16% of methane (each in vol%).
- the temperature within the briquette is desirably maintained homogeneously.
- a vertical carbonization furnace which is a gas and solid temperature countercurrent moving bed, it is necessary to set operating conditions so as to secure a time for the temperature within the briquette to become homogeneous.
- FIG. 3 illustrates results of measurement of time difference between a time at which a surface layer reaches 850°C and a time at which the center reaches 850°C when the temperature was increased from 25°C to 850°C at 5°C/min as the volume of the briquette was varied.
- a briquette volume of 6 cc was used as a reference condition, and sorting was done with relative values with respect to a case of the briquette volume of 6 cc.
- the atmosphere was a mixed gas of 30% of hydrogen, 11% of carbon monoxide, 17% of carbon dioxide, 21% of nitrogen, 5% of water vapor, and 16% of methane (each in vol%), and the temperatures of the surface layer and the center of the briquette were measured.
- the time for the entire briquette to reach a homogeneous temperature increases as the volume of the briquette increases.
- FIG. 4 A relation between the briquette volume and the briquette descending speed necessary for the inside of the briquette to reach a homogeneous temperature when a zone length at 850°C is 1.5 m and the briquette descending speed of 1 m/hour for the briquette volume of 6 cc is used as a reference is illustrated in FIG. 4 . It is necessary to decrease the descending speed as the briquette volume is increased. This means a decrease in the production speed, and, when the volume of 6 cc is set as a reference, the production speed decreases by 5% or more when the volume becomes 14 cc or greater.
- the representative particle diameter of ferrocoke is expressed by (length ⁇ breadth ⁇ thickness) 1/3 as described above, the representative diameter of the volume of 6 cc is equivalent to 23.8 mm, the representative diameter of the volume of 14 cc is equivalent to 28.3 mm, and the representative diameter of the volume of 18 cc is equivalent to 30.6 mm.
- a briquette of a smaller size is more advantageous in terms of productivity, but when use in a blast furnace is assumed, a lower limit of size from the viewpoint of gas permeability is desirably specified.
- Ferrocoke is desirably used by being mixed with an iron material including sintered steel, a pellet, lump ore, or the like.
- the iron material including the sintered steel, the pellet, the lump ore, or the like will be referred to as ore. Since it is important in terms of operation to maintain the gas permeability of a mixed layer of ore and ferrocoke, the influence of ferrocoke particle diameter on ventilation resistance of the mixed layer of ore and ferrocoke was investigated. A particle size distribution of ore when the ratio of ferrocoke in the ore was 21 vol% (equivalent to a ferrocoke ratio of 35 mass%) is illustrated in FIG. 5 .
- Equation (2) A change in the ventilation resistance according to the size of ferrocoke mixed in ore was calculated using equation (2) below.
- ⁇ represents a shape coefficient (assumed to be 0.7)
- dp represents an average particle diameter of the ore/ferrocoke mixed layer
- ⁇ represents a porosity of the ore/ferrocoke mixed layer.
- Permeability index 1 / ⁇ dp 1.3 ⁇ 1 ⁇ ⁇ 1.3 / ⁇ 3
- the average diameter of the mixed layer was calculated by correcting the particle size distribution illustrated in FIG. 5 according to an assumed ferrocoke size, and the porosity was assumed from the corrected particle size distribution (see Non-Patent Document 3). The results are illustrated in FIG. 6 . It was found that a change in the ventilation resistance is small in a ferrocoke size range of 15 mm to 35 mm. When the size of ferrocoke is below 15 mm, the average diameter of the mixed layer decreases and thus the ventilation resistance increases. The ventilation resistance also increases under a condition in which the size of ferrocoke is large, but this is caused by a decrease in the porosity due to widening of the particle size distribution.
- the ferrocoke particle diameter is preferably in a range of 15 mm to 35 mm.
- the particle diameter of ferrocoke is desirably 28.3 mm or less from the viewpoint of securing the productivity and in a range of 15 mm to 35 mm from the viewpoint of the gas permeability upon use in a blast furnace.
- the particle diameter of ferrocoke is therefore in a range of 15 mm to 28 mm in consideration of both ensuring the productivity and the gas permeability.
- FIG. 8 A relation between ferrocoke carbonization temperature and reaction rate of carbon in ferrocoke for ferrocoke that has been reacted up to 1200°C under the conditions of FIG. 7 is illustrated in FIG. 8 .
- Results were obtained, which indicated that the reaction rates at the ferrocoke carbonization temperatures of 750°C and 950°C were at a lower level, and the maximum value was obtained at 850°C.
- the ferrocoke carbonization temperature was 750°C
- the reduction rate of iron ore in ferrocoke was as low as 20% as illustrated in FIG. 2 , and it is thus assumed that the reactivity became low because the catalytic effect of reduced iron was small.
- Reaction starting temperatures in the above tests of ferrocoke manufactured at a carbonization temperature of 850°C with its iron content varied from 0 mass% to 40 mass% are illustrated in FIG. 9 .
- FIG. 9 As the content of iron in ferrocoke increases, the effects of reactivity being improved and a decrease in the reaction starting temperature are exhibited. A large effect is exhibited from the iron content of 5 mass%, and the effect is saturated at 40 mass% or greater.
- the iron content in the ferrocoke is preferably in a range of 5 mass% to 40 mass%, and more preferably in a range of 10 mass% to 40 mass%.
- ferrocoke having a high CO 2 reactivity was able to be manufactured by setting the temperature of ferrocoke upon the carbonization in a range of 800°C to 900°C, desirably in a range of 800°C to 850°C, and particularly desirably around 850°C.
- the iron content in ferrocoke is preferably in a range of 5 mass% to 40 mass%, and more preferably in a range of 10 mass% to 40 mass%.
- Coal is preferably used as the carbonaceous material. Other than coal, biomass or the like may be used.
- a briquette obtained by briquetting a mixture of coal and iron ore (70 mass% of coal and 30 mass% of iron ore) using a briquette machine was continuously carbonized in a gas heating type vertical carbonization furnace.
- Some of furnace top gas of the carbonization furnace (30 vol% of hydrogen, 11 vol% of carbon monoxide, 17 vol% of carbon dioxide, 21 vol% of nitrogen, 5 vol% of water vapor, and 16 vol% of (methane + ethane)), which has been heated, was used as gas, and the briquette was heated up by forming a countercurrent moving bed with gas elevating in the carbonization furnace and the briquette continuously descending in the furnace.
- the ferrocoke manufacturing conditions (ferrocoke carbonization temperatures), the reduction rates of iron in the ferrocoke, the operating conditions (the amounts of ferrocoke used, the chamber oven coke ratios, and pulverized coal ratios), and the blast furnace operation results (reducing agent ratios) are illustrated in Table 1, and a relation between the ferrocoke carbonization temperature and the blast furnace reducing agent ratio is illustrated in FIG. 10 .
- Table 1 the base is a case of an ordinary blast furnace operation of not using ferrocoke, and cases 1 to 5 are cases in which an operation of uniformly mixing ferrocoke in an ore layer and charging it from the blast furnace top was carried out.
- the reducing agent ratio is able to be decreased by using ferrocoke as compared to the condition (base) under which ferrocoke is not used.
- the reducing agent ratio was able to be decreased by 30 kg/t or more when the temperature of ferrocoke in the carbonization (the ferrocoke carbonization temperature) was in a range of 800°C to 900°C. This is assumed to be due to interaction between an effect of a function as a catalyst increasing because of the reduction rate of iron in ferrocoke increasing by an increase in the carbonization temperature and an effect of the reactivity of the coke portion decreasing by an increase in the carbonization temperature.
- the present invention is applicable to a method of manufacturing ferrocoke by briquetting a mixture of a carbonaceous material and iron ore and carbonizing the briquette formed.
Description
- The present invention relates to a metallurgical ferrocoke manufacturing method of manufacturing ferrocoke by briquetting a carbonaceous material and iron ore and carbonizing the briquette.
- To decrease a reducing agent ratio in a blast furnace, it is effective to decrease a thermal reserve zone temperature generated in the blast furnace (for example, see Non-Patent Literature 1). An example of a method of decreasing the thermal reserve zone temperature is a method of decreasing a starting temperature of a gasification reaction (endothermic reaction) of coke expressed by equation (1) below.
C + CO2 → 2CO (1)
- Ferrocoke manufactured by carbonization of a briquette obtained by mixing and briquetting a carbonaceous material (coal) and iron ore is able to increase CO2 reactivity of coke in ferrocoke due to a catalytic effect of reduced iron ore, and to decrease a reducing agent ratio due to a decrease in a thermal reserve zone temperature following the increase in the CO2 reactivity (for example, refer to Patent Literature 1).
- As a technique of manufacturing such ferrocoke, a method of mixing fine iron ore into coal and carbonizing, in an ordinary chamber coke oven, a mixture obtained by the mixing has been studied. For example, (a) a method of charging a fine mixture of coal and fine iron ore into a chamber coke oven, (b) a method of briquetting coal and iron ore in a cold environment, that is, at room temperature, and charging the briquette into a chamber coke oven (see Non-Patent Literature 2), (c) a method of carbonizing a briquette of coal and iron ore in a vertical carbonization furnace instead of a chamber coke oven (see Non-Patent Literature 3), and the like have been proposed. Because even an iron oxide is able to exhibit an effect of increasing CO2 reactivity of coke, an effect of increasing CO2 reactivity is presumed to be exhibited even if iron ore is not fully reduced to metallic iron (see Non-Patent Literature 4).
- For ordinary coke charged into a blast furnace, CO2 reactivity is considered to improve as carbonization temperature is decreased (for example, see Non-Patent Literature 5).
- Patent Literature 1: Japanese Laid-open Patent Publication No.
2006-28594 -
- Non-Patent Literature 1: "Iron and Steel," The Iron and Steel Institute of Japan, 87, 2001, p. 357
- Non-Patent Literature 2: "Coke Technology Annual Report," Japan Charcoal and Fuel Association, 1958, p. 38
- Non-Patent Literature 3: "JFE Annual Report" 22, 2008, p. 20
- Non-Patent Literature 4: "Fuel" 65, 1986, p. 1476
- Non-Patent Literature 5: "Iron and Steel," The Iron and Steel Institute of Japan, 68, 1982, S-744
- Non-Patent Literature 6: Kawasaki Steel Technical Report, 6 (1974), p. 16
- In order to further decrease a reducing agent ratio in a blast furnace, it is necessary to use ferrocoke in the blast furnace as described above, increase CO2 reactivity of coke in ferrocoke due to a catalyst effect of reduced iron ore, and decrease a thermal reserve zone temperature. However, conditions for manufacturing optimal ferrocoke which increase CO2 reactivity of coke in ferrocoke have not been disclosed. Further, CO2 reactivity of coke is desirably evaluated under conditions that have taken blast furnace conditions into consideration.
- The invention has been made in view of the above problems, and its object is to provide a metallurgical ferrocoke manufacturing method by which, when manufacturing ferrocoke by carbonizing a mixture of a carbonaceous material and iron ore, CO2 reactivity of coke in ferrocoke inside a blast furnace is increased, thereby enabling a decrease in a thermal reserve zone temperature and a decrease in a reducing agent ratio.
- In order to solve the above problems and achieve the object, the present invention is a metallurgical ferrocoke manufacturing method of manufacturing ferrocoke by briquetting a mixture of a carbonaceous material and iron ore to form a briquette and carbonizing the briquette, and is characterized in that a maximum temperature of ferrocoke during the carbonization is in a range of 800°C or higher and 900°C or lower. The maximum temperature of the ferrocoke during the carbonization is preferably in a range of 800°C or higher and 850°C or lower. The particle diameter of the ferrocoke is in a range of 15 mm or greater and 28 mm or less. The ferrocoke preferably has an iron content in a range of 5 mass% or greater and 40 mass% or less and more preferably in a range of 10 mass% or greater and 40 mass% or less. Desirably, the carbonization of the briquette is performed in a vertical furnace and a furnace top gas of the vertical furnace is used as a gas that heats up the briquette. The furnace top gas includes carbon monoxide, carbon dioxide, hydrogen, methane, and nitrogen. The gas that heats up the briquette desirably includes at least two components selected from a group consisting of carbon monoxide, carbon dioxide, hydrogen, methane, and nitrogen.
- According to the present invention, ferrocoke having high CO2 reactivity in a blast furnace is able to be manufactured, and a reducing agent ratio in the blast furnace is able to be decreased due to a decrease in a thermal reserve zone temperature. Further, according to the preset invention, a carbonization temperature is not increased by what is more than necessary when ferrocoke is manufactured, and thus contribution to adjustment of a necessary amount of heat is achievable.
-
-
FIG. 1 is a schematic diagram of a shape of ferrocoke. -
FIG. 2 is a graph illustrating a relation between ferrocoke carbonization temperature and reduction rate of iron in ferrocoke. -
FIG. 3 is a graph illustrating time difference between a particle surface layer and a center to reach a same temperature during temperature increase. -
FIG. 4 is a graph illustrating descending speed necessary for the particle surface layer and the center to reach the same temperature. -
FIG. 5 is a graph illustrating an ore particle size distribution.
distribution. -
FIG. 6 is a graph illustrating a relation between particle diameter of ferrocoke and ventilation resistance of a mixed layer of ore and ferrocoke. -
FIG. 7 is a graph illustrating ferrocoke reaction testing conditions. -
FIG. 8 is a graph illustrating a relation between ferrocoke carbonization temperature and CO2 reaction rate of carbon. -
FIG. 9 is a graph illustrating a relation between iron content in ferrocoke and reaction starting temperature. -
FIG. 10 is a graph illustrating a relation between ferrocoke carbonization temperature and reducing agent ratio in a blast furnace upon using ferrocoke. - For ferrocoke used in blast furnace operations which is manufactured by carbonizing a briquette obtained by briquetting a mixture of a carbonaceous material and iron ore, a method of manufacturing ferrocoke was studied in order to increase CO2 reactivity of coke in ferrocoke, and the following considerations were made.
- (1) Since the higher the temperature of ferrocoke upon carbonization is, the further the reduction of mixed iron ore proceeds and thus the more enhanced the catalytic effect is.
- (2) Since generally the lower the temperature of coke upon carbonization is, the more improved the CO2 reactivity of coke is, focus is also given on a coke portion obtained by carbonization of a carbonaceous material, which is a portion other than iron in ferrocoke, and the lower the carbonization temperature is, for the coke portion in the ferrocoke too, the more improved the reactivity of the coke portion in the ferrocoke is.
- That is, when the temperature of ferrocoke becomes higher upon the carbonization in manufacturing ferrocoke, there is a possibility that the CO2 reactivity of coke increases from the viewpoint of the catalytic effect of the reduced iron but also a possibility that the CO2 reactivity of coke decreases from the viewpoint of the properties of coke. Therefore, an optimal temperature range is considered to exist in ferrocoke manufacturing conditions for increasing the CO2 reactivity of coke.
- Therefore, the inventors, by carrying out experiments on ferrocoke that had been carbonized under varying temperature conditions to evaluate the CO2 reactivity of coke under conditions reproducing the blast furnace gas and temperature, derived carbonization conditions of ferrocoke that increase the CO2 reactivity of coke. The process thereof will be described hereinafter.
- Ferrocoke was manufactured by carbonizing, in a batch-type pressurized carbonization furnace, a briquette (briquette) obtained by briquetting a mixture of coal and iron ore (70 mass% of coal; and 10, 20, 30, and 40 mass% of iron ore) using a briquette machine. A shape of the briquette is illustrated in
FIG. 1 . L is 30 mm, B is 25 mm, and T is 18 mm. L represents the length, B represents the breadth, T represents the thickness, and a representative particle diameter of ferrocoke is represented by (length × breadth × thickness)1/3, that is, (L × B × T)1/3. - Temperatures of ferrocoke during the carbonization (ferrocoke carbonization temperatures) were 800°C, 850°C and 900°C. A ferrocoke carbonization temperature is the maximum temperature during the carbonization, and is obtained by measuring a temperature at a central portion of the briquette. Temperature was increased up to this maximum temperature at 5°C/min, and maintained at the maximum temperature for 90 minutes. An atmosphere was a mixed gas of 30% of hydrogen, 11% of carbon monoxide, 17% of carbon dioxide, 21% of nitrogen, 5% of water vapor, and 16% of methane (each in vol%). These are based on a premise of continuous manufacturing by a gas-solid countercurrent moving bed using a vertical furnace, and an assumption of a process using furnace top gas as gas, in actual manufacturing of ferrocoke. Reduction rates of iron ore in ferrocoke at each ferrocoke carbonization temperature are illustrated in
FIG. 2 . The reduction rate increases as the ferrocoke carbonization temperature increases. - Next, influence of size of ferrocoke on productivity was studied. During carbonization, in particular, with respect to the maximum temperature that largely influences properties of a product, the temperature within the briquette is desirably maintained homogeneously. When a vertical carbonization furnace, which is a gas and solid temperature countercurrent moving bed, is used, it is necessary to set operating conditions so as to secure a time for the temperature within the briquette to become homogeneous.
-
FIG. 3 illustrates results of measurement of time difference between a time at which a surface layer reaches 850°C and a time at which the center reaches 850°C when the temperature was increased from 25°C to 850°C at 5°C/min as the volume of the briquette was varied. A briquette volume of 6 cc was used as a reference condition, and sorting was done with relative values with respect to a case of the briquette volume of 6 cc. The atmosphere was a mixed gas of 30% of hydrogen, 11% of carbon monoxide, 17% of carbon dioxide, 21% of nitrogen, 5% of water vapor, and 16% of methane (each in vol%), and the temperatures of the surface layer and the center of the briquette were measured. The time for the entire briquette to reach a homogeneous temperature increases as the volume of the briquette increases. - Next, operating conditions of the carbonization furnace which were necessary to make the temperature of the entire briquette homogeneous were studied. When the condition of the briquette volume of 6 cc is used as a reference, for a briquette having a volume larger than 6 cc, in order to make the time to hold all of its particles at a homogeneous temperature the same as that of the reference, that is, the time to hold all the particles at 850°C after the center of the briquette reaches 850°C the same as that of the reference, the time illustrated in
FIG. 3 is required additionally with respect to the condition of 6 cc. Means for adjusting the time for the center of the briquette to reach 850°C may be a change in a descending speed of the briquette. A relation between the briquette volume and the briquette descending speed necessary for the inside of the briquette to reach a homogeneous temperature when a zone length at 850°C is 1.5 m and the briquette descending speed of 1 m/hour for the briquette volume of 6 cc is used as a reference is illustrated inFIG. 4 . It is necessary to decrease the descending speed as the briquette volume is increased. This means a decrease in the production speed, and, when the volume of 6 cc is set as a reference, the production speed decreases by 5% or more when the volume becomes 14 cc or greater. When the representative particle diameter of ferrocoke is expressed by (length × breadth × thickness)1/3 as described above, the representative diameter of the volume of 6 cc is equivalent to 23.8 mm, the representative diameter of the volume of 14 cc is equivalent to 28.3 mm, and the representative diameter of the volume of 18 cc is equivalent to 30.6 mm. As described above, a briquette of a smaller size is more advantageous in terms of productivity, but when use in a blast furnace is assumed, a lower limit of size from the viewpoint of gas permeability is desirably specified. - Ferrocoke is desirably used by being mixed with an iron material including sintered steel, a pellet, lump ore, or the like. Hereinafter, the iron material including the sintered steel, the pellet, the lump ore, or the like will be referred to as ore. Since it is important in terms of operation to maintain the gas permeability of a mixed layer of ore and ferrocoke, the influence of ferrocoke particle diameter on ventilation resistance of the mixed layer of ore and ferrocoke was investigated. A particle size distribution of ore when the ratio of ferrocoke in the ore was 21 vol% (equivalent to a ferrocoke ratio of 35 mass%) is illustrated in
FIG. 5 . A change in the ventilation resistance according to the size of ferrocoke mixed in ore was calculated using equation (2) below. Here, Φ represents a shape coefficient (assumed to be 0.7), dp represents an average particle diameter of the ore/ferrocoke mixed layer, and ε represents a porosity of the ore/ferrocoke mixed layer. - The average diameter of the mixed layer was calculated by correcting the particle size distribution illustrated in
FIG. 5 according to an assumed ferrocoke size, and the porosity was assumed from the corrected particle size distribution (see Non-Patent Document 3). The results are illustrated inFIG. 6 . It was found that a change in the ventilation resistance is small in a ferrocoke size range of 15 mm to 35 mm. When the size of ferrocoke is below 15 mm, the average diameter of the mixed layer decreases and thus the ventilation resistance increases. The ventilation resistance also increases under a condition in which the size of ferrocoke is large, but this is caused by a decrease in the porosity due to widening of the particle size distribution. From the above, it became clear that, in order to avoid an increase in the ventilation resistance, the ferrocoke particle diameter is preferably in a range of 15 mm to 35 mm. For ferrocoke which is manufactured using a briquetting machine and has a shape like that illustrated inFIG. 1 , the previously defined representative particle diameter of ferrocoke (= (L × B × T)1/3) is desirably in a range of 15 mm to 35 mm. More desirably, the representative particle diameter of ferrocoke is in a range of 20 mm to 35 mm. - From the above, the particle diameter of ferrocoke is desirably 28.3 mm or less from the viewpoint of securing the productivity and in a range of 15 mm to 35 mm from the viewpoint of the gas permeability upon use in a blast furnace. The particle diameter of ferrocoke is therefore in a range of 15 mm to 28 mm in consideration of both ensuring the productivity and the gas permeability. Briquettes have common names such as a Masec type, a pillbox type, an egg type, an ellipse type, and the like according to shapes of molds of the briquette machine. Since any briquette has three intersecting symmetric axes (the above L, B, and T), characteristics thereof are specified by the above-expressed representative particle diameter (= (L × B × T)1/3).
- Next, tests of reacting ferrocoke manufactured at ferrocoke carbonization temperatures of 750°C, 800°C, 850°C, 900°C, and 950°C under conditions simulating conditions in a blast furnace were carried out. The briquette shape was set such that L = 30 mm, B = 25 mm, and T = 18 mm in
FIG. 1 . Reaction conditions are illustrated inFIG. 7 . InFIG. 7 , the portion indicated by a bold line corresponds to surrounding conditions of a material charged from a furnace top of a blast furnace and descending down through the furnace to a temperature zone of 1200°C. - A relation between ferrocoke carbonization temperature and reaction rate of carbon in ferrocoke for ferrocoke that has been reacted up to 1200°C under the conditions of
FIG. 7 is illustrated inFIG. 8 . Results were obtained, which indicated that the reaction rates at the ferrocoke carbonization temperatures of 750°C and 950°C were at a lower level, and the maximum value was obtained at 850°C. When the ferrocoke carbonization temperature was 750°C, the reduction rate of iron ore in ferrocoke was as low as 20% as illustrated inFIG. 2 , and it is thus assumed that the reactivity became low because the catalytic effect of reduced iron was small. It is assumed that although the reduction rate of iron ore in ferrocoke increased as the ferrocoke carbonization temperature increased as illustrated inFIG. 2 , the reactivity decreased at 950°C due to influence by a decrease in the reactivity of the coke portion. - Reaction starting temperatures in the above tests of ferrocoke manufactured at a carbonization temperature of 850°C with its iron content varied from 0 mass% to 40 mass% are illustrated in
FIG. 9 . A temperature at which the reaction rate of carbon in ferrocoke reaches 0.8% was defined as the reaction starting temperature. According toFIG. 9 , as the content of iron in ferrocoke increases, the effects of reactivity being improved and a decrease in the reaction starting temperature are exhibited. A large effect is exhibited from the iron content of 5 mass%, and the effect is saturated at 40 mass% or greater. As a result, it can be said that the iron content is desirably in a range of 5 mass% to 40 mass%. Therefore, the iron content in the ferrocoke is preferably in a range of 5 mass% to 40 mass%, and more preferably in a range of 10 mass% to 40 mass%. - From the above, it became clear that, when a mixture of a carbonaceous material and iron ore is carbonized to manufacture ferrocoke, ferrocoke having a high CO2 reactivity was able to be manufactured by setting the temperature of ferrocoke upon the carbonization in a range of 800°C to 900°C, desirably in a range of 800°C to 850°C, and particularly desirably around 850°C. The iron content in ferrocoke is preferably in a range of 5 mass% to 40 mass%, and more preferably in a range of 10 mass% to 40 mass%. Coal is preferably used as the carbonaceous material. Other than coal, biomass or the like may be used.
- Use in a blast furnace was tested for ferrocoke manufactured under respective carbonization temperature conditions.
- For ferrocoke, a briquette obtained by briquetting a mixture of coal and iron ore (70 mass% of coal and 30 mass% of iron ore) using a briquette machine was continuously carbonized in a gas heating type vertical carbonization furnace. Some of furnace top gas of the carbonization furnace (30 vol% of hydrogen, 11 vol% of carbon monoxide, 17 vol% of carbon dioxide, 21 vol% of nitrogen, 5 vol% of water vapor, and 16 vol% of (methane + ethane)), which has been heated, was used as gas, and the briquette was heated up by forming a countercurrent moving bed with gas elevating in the carbonization furnace and the briquette continuously descending in the furnace. As dimensions of the briquette, the shape illustrated in
FIG. 1 (L = 30 mm, B = 25 mm, and T = 18 mm) was used. In the vertical carbonization furnace, the briquette charged from the furnace top was heated up to around 600°C in approximately one hour, heated to the maximum temperature from 600°C (not part of the invention) at 2°C/min to 5°C/min, and maintained at that maximum temperature for 1.5 hours. The maximum temperature was regarded as the ferrocoke carbonization temperature. Here, for example, as described inNon-Patent Literature 6, there is a difference between the gas temperature and the solid temperature in the vertical carbonization furnace. Taking this difference into consideration, a heat transfer simulation in the countercurrent moving bed was carried out, and gas conditions were adjusted so that the solid temperature met a desired condition. - The ferrocoke manufacturing conditions (ferrocoke carbonization temperatures), the reduction rates of iron in the ferrocoke, the operating conditions (the amounts of ferrocoke used, the chamber oven coke ratios, and pulverized coal ratios), and the blast furnace operation results (reducing agent ratios) are illustrated in Table 1, and a relation between the ferrocoke carbonization temperature and the blast furnace reducing agent ratio is illustrated in
FIG. 10 . In Table 1, the base is a case of an ordinary blast furnace operation of not using ferrocoke, andcases 1 to 5 are cases in which an operation of uniformly mixing ferrocoke in an ore layer and charging it from the blast furnace top was carried out.Table 1 ( Cases 1 and 5 are not part of the invention)Base Case 1 Case 2 Case 3 Case 4Case 5 Ferrocoke carbonization temperature ° C 750 800 850 900 950 Reduction rate of iron in ferrocoke % 20 45 69 84 87 Amount of ferrocoke used kg/ t 0 100 100 100 100 100 Chamber oven coke ratio kg/t 352 262 250 244 251 257 Pulverized coal ratio kg/t 130 130 130 130 130 130 Reducing agent ratio kg/t 482 463 450 444 451 457 - According to Table 1, the reducing agent ratio is able to be decreased by using ferrocoke as compared to the condition (base) under which ferrocoke is not used. Particularly, the reducing agent ratio was able to be decreased by 30 kg/t or more when the temperature of ferrocoke in the carbonization (the ferrocoke carbonization temperature) was in a range of 800°C to 900°C. This is assumed to be due to interaction between an effect of a function as a catalyst increasing because of the reduction rate of iron in ferrocoke increasing by an increase in the carbonization temperature and an effect of the reactivity of the coke portion decreasing by an increase in the carbonization temperature.
- An embodiment to which the invention made by the inventors is applied has been described, but the present invention is not limited by the description and drawings constituting a part of disclosure of the present invention through the present embodiment. For example, other embodiments, examples, operation techniques, and the like made by any person skilled in the art or the like based on the present embodiment are all included in the scope of the present invention.
- The present invention is applicable to a method of manufacturing ferrocoke by briquetting a mixture of a carbonaceous material and iron ore and carbonizing the briquette formed.
Claims (4)
- A metallurgical ferrocoke manufacturing method of manufacturing ferrocoke by briquetting a mixture of a carbonaceous material and iron ore to form a briquette and carbonizing the briquette, wherein a maximum temperature of ferrocoke during the carbonization is in a range of 800°C or higher and 900°C or lower,
in order to achieve a particle diameter of the ferrocoke in a range of 15 mm or greater and 28 mm or less. - The metallurgical ferrocoke manufacturing method according to claim 1, wherein the maximum temperature of the ferrocoke during the carbonization is in a range of 800°C or higher and 850°C or lower.
- The metallurgical ferrocoke manufacturing method according to claim 1, wherein the ferrocoke has an iron content in a range of 5 mass% or greater and 40 mass% or less.
- The metallurgical ferrocoke manufacturing method according to claim 1, wherein the carbonization of the briquette is performed in a vertical furnace and a furnace top gas of the vertical furnace is used as a gas that heats up the briquette.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2010046061 | 2010-03-03 | ||
PCT/JP2011/054367 WO2011108466A1 (en) | 2010-03-03 | 2011-02-25 | Process for producing ferro coke for metallurgy |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2543716A1 EP2543716A1 (en) | 2013-01-09 |
EP2543716A4 EP2543716A4 (en) | 2016-07-13 |
EP2543716B1 true EP2543716B1 (en) | 2019-04-03 |
Family
ID=44542119
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP11750576.8A Active EP2543716B1 (en) | 2010-03-03 | 2011-02-25 | Process for producing ferro coke for metallurgy |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP2543716B1 (en) |
JP (1) | JP5790028B2 (en) |
KR (1) | KR20120123482A (en) |
CN (1) | CN102782095B (en) |
WO (1) | WO2011108466A1 (en) |
Families Citing this family (14)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103468841A (en) * | 2013-09-06 | 2013-12-25 | 鞍钢股份有限公司 | Semi coke injected by blast furnace and preparation method thereof |
CN103756701B (en) * | 2014-01-21 | 2015-11-25 | 河北联合大学 | Hyperergy coke and production method thereof |
US11111441B2 (en) | 2015-06-24 | 2021-09-07 | Jfe Steel Corporation | Method for producing ferrocoke |
CN106635067A (en) * | 2016-11-24 | 2017-05-10 | 武汉科思瑞迪科技有限公司 | Shaft furnace process for producing iron coke |
CN110093467B (en) * | 2019-06-05 | 2020-07-17 | 东北大学 | Preparation method of iron coke |
KR102289527B1 (en) * | 2019-09-24 | 2021-08-12 | 현대제철 주식회사 | Reduction method of the reducing agents ratio and co2 gas of the blast furnace |
CN110699141B (en) * | 2019-10-10 | 2021-08-20 | 中南大学 | Chain grate-rotary kiln injected biomass fuel and preparation method and application thereof |
CN110699142B (en) * | 2019-10-10 | 2021-02-02 | 中南大学 | Iron ore sintering biomass fuel and preparation method and application thereof |
JP2022187900A (en) * | 2021-06-08 | 2022-12-20 | 株式会社神戸製鋼所 | Pig iron production method and ore raw material |
CN113416567B (en) * | 2021-07-08 | 2022-07-15 | 山西沁新能源集团股份有限公司 | Preparation method of ferro coke and ferro coke |
CN115612762B (en) * | 2021-07-13 | 2023-11-03 | 山西沁新能源集团股份有限公司 | Iron coke with high cold and hot strength and preparation method thereof |
CN115612761B (en) * | 2021-07-13 | 2023-11-03 | 山西沁新能源集团股份有限公司 | Low-ash high-strength iron coke and preparation method thereof |
CN115612760B (en) * | 2021-07-13 | 2023-11-03 | 山西沁新能源集团股份有限公司 | Low-ash high-strength iron coke and preparation method thereof |
KR102567429B1 (en) * | 2021-07-27 | 2023-08-17 | 현대제철 주식회사 | How to control the charge distribution profile of a blast furnace |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5966486A (en) * | 1982-10-07 | 1984-04-14 | Nippon Steel Corp | Continuous production unit of molded ferro coke |
JPH0428810A (en) * | 1990-05-24 | 1992-01-31 | Nippon Steel Corp | Smelting reduction iron-making method |
CN1077602C (en) * | 1999-08-20 | 2002-01-09 | 方新贵 | Spheroidized iron-coke ore solidified rapidly at middle temp and its apparatus |
JP4487564B2 (en) * | 2002-12-25 | 2010-06-23 | Jfeスチール株式会社 | Ferro-coke manufacturing method |
JP4556525B2 (en) * | 2004-07-16 | 2010-10-06 | Jfeスチール株式会社 | Blast furnace operation method |
JP5087868B2 (en) * | 2006-07-05 | 2012-12-05 | Jfeスチール株式会社 | Ferro-coke manufacturing method |
CN101910364B (en) * | 2007-12-26 | 2014-05-14 | 杰富意钢铁株式会社 | Method of producing ferro-coke |
JP5386838B2 (en) * | 2008-03-21 | 2014-01-15 | Jfeスチール株式会社 | Ferro-coke for metallurgy |
JP5365043B2 (en) * | 2008-03-27 | 2013-12-11 | Jfeスチール株式会社 | Ferro-coke manufacturing method |
-
2011
- 2011-02-25 CN CN201180011516.0A patent/CN102782095B/en active Active
- 2011-02-25 EP EP11750576.8A patent/EP2543716B1/en active Active
- 2011-02-25 WO PCT/JP2011/054367 patent/WO2011108466A1/en active Application Filing
- 2011-02-25 KR KR1020127022341A patent/KR20120123482A/en active Search and Examination
- 2011-03-01 JP JP2011043509A patent/JP5790028B2/en active Active
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
CN102782095A (en) | 2012-11-14 |
KR20120123482A (en) | 2012-11-08 |
JP2011202159A (en) | 2011-10-13 |
EP2543716A1 (en) | 2013-01-09 |
JP5790028B2 (en) | 2015-10-07 |
CN102782095B (en) | 2015-07-01 |
WO2011108466A1 (en) | 2011-09-09 |
EP2543716A4 (en) | 2016-07-13 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
EP2543716B1 (en) | Process for producing ferro coke for metallurgy | |
JP5059379B2 (en) | Hot briquette iron for blast furnace charging raw material and method for producing the same | |
JP4793501B2 (en) | Blast furnace operation method using ferro-coke | |
EP2930249B1 (en) | Method for operating blast furnace and method for producing molten pig iron | |
EP2239344A1 (en) | Self-fluxing pellets for use in a blast furnce and process for the production of the same | |
Turkova et al. | CO reactivity and porosity of manganese materials | |
US9169532B2 (en) | Process for the improvement of reducibility of ore pellets | |
US6918944B2 (en) | Carbon containing nonfired agglomerated ore for blast furnace and production method thereof | |
JP2008189952A (en) | Method for operating blast furnace | |
JP2007246786A (en) | Ferrocoke and method for producing sintered ore | |
JP6119700B2 (en) | Blast furnace operation method | |
JP2013147692A (en) | Method of operating blast furnace at high tapping ratio of pig iron | |
JPH026815B2 (en) | ||
EP3907303A1 (en) | Blast furnace operation method | |
EP2495339A1 (en) | Method for operating blast furnace | |
WO2013183170A1 (en) | Blast furnace operation method using ferrocoke | |
JP6070131B2 (en) | Method for producing reduced iron | |
JP5565143B2 (en) | Blast furnace operation method | |
EP4353840A1 (en) | Agglomerated ore assessing method and agglomerated ore | |
EP3255122B1 (en) | Ferrocoke manufacturing method | |
Chandaliya et al. | Utilization of steel plant waste and by-products in reactive coke making | |
JP2021147649A (en) | Binder for producing agglomerate, method for producing agglomerate using the same, and method for producing reduced iron | |
CN107653354A (en) | A kind of preparation method of catalyst powder | |
JPH02200712A (en) | Method for operating blast furnace | |
Tripathy et al. | Preparation of Pre-Reduced Briquettes and Studies on the Kinetics of the Process Under Reduced Pressure |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
|
17P | Request for examination filed |
Effective date: 20120829 |
|
AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
DAX | Request for extension of the european patent (deleted) | ||
RA4 | Supplementary search report drawn up and despatched (corrected) |
Effective date: 20160613 |
|
RIC1 | Information provided on ipc code assigned before grant |
Ipc: C21B 5/00 20060101ALI20160607BHEP Ipc: C10B 53/08 20060101AFI20160607BHEP Ipc: C10B 57/06 20060101ALI20160607BHEP Ipc: C10B 57/04 20060101ALI20160607BHEP Ipc: C22B 1/245 20060101ALI20160607BHEP |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: EXAMINATION IS IN PROGRESS |
|
17Q | First examination report despatched |
Effective date: 20180119 |
|
GRAP | Despatch of communication of intention to grant a patent |
Free format text: ORIGINAL CODE: EPIDOSNIGR1 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: GRANT OF PATENT IS INTENDED |
|
INTG | Intention to grant announced |
Effective date: 20180926 |
|
GRAS | Grant fee paid |
Free format text: ORIGINAL CODE: EPIDOSNIGR3 |
|
GRAA | (expected) grant |
Free format text: ORIGINAL CODE: 0009210 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE PATENT HAS BEEN GRANTED |
|
AK | Designated contracting states |
Kind code of ref document: B1 Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR |
|
REG | Reference to a national code |
Ref country code: GB Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: EP Ref country code: AT Ref legal event code: REF Ref document number: 1115706 Country of ref document: AT Kind code of ref document: T Effective date: 20190415 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R096 Ref document number: 602011057764 Country of ref document: DE |
|
REG | Reference to a national code |
Ref country code: IE Ref legal event code: FG4D |
|
REG | Reference to a national code |
Ref country code: NL Ref legal event code: MP Effective date: 20190403 |
|
REG | Reference to a national code |
Ref country code: LT Ref legal event code: MG4D |
|
REG | Reference to a national code |
Ref country code: AT Ref legal event code: MK05 Ref document number: 1115706 Country of ref document: AT Kind code of ref document: T Effective date: 20190403 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: NL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: HR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: AL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: PT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190803 Ref country code: NO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190703 Ref country code: FI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: ES Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: LT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: CZ Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BG Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190703 Ref country code: RS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: LV Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: PL Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: GR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190704 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: AT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: IS Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190803 |
|
REG | Reference to a national code |
Ref country code: DE Ref legal event code: R097 Ref document number: 602011057764 Country of ref document: DE |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: DK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: EE Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: SK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: RO Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 |
|
PLBE | No opposition filed within time limit |
Free format text: ORIGINAL CODE: 0009261 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SM Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: IT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 |
|
26N | No opposition filed |
Effective date: 20200106 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: TR Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: SI Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 |
|
REG | Reference to a national code |
Ref country code: CH Ref legal event code: PL |
|
GBPC | Gb: european patent ceased through non-payment of renewal fee |
Effective date: 20200225 |
|
REG | Reference to a national code |
Ref country code: BE Ref legal event code: MM Effective date: 20200229 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MC Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: LU Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200225 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: CH Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200229 Ref country code: LI Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200229 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: IE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200225 Ref country code: GB Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200225 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: BE Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES Effective date: 20200229 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MT Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 Ref country code: CY Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 |
|
PG25 | Lapsed in a contracting state [announced via postgrant information from national office to epo] |
Ref country code: MK Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT Effective date: 20190403 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: FR Payment date: 20230110 Year of fee payment: 13 |
|
PGFP | Annual fee paid to national office [announced via postgrant information from national office to epo] |
Ref country code: DE Payment date: 20221230 Year of fee payment: 13 |