Abstract: Provided is a coal deactivation processing device that can suppress an increase in carbon monoxide concentration in processing gas regardless of the fact that used processing gas is circulated and refused. The present invention is provided with: a device main body (141) that causes coal therewithin to flow from one side to another; a processing gas feed means (142-144, 144a, 145,145a, 146, 146a, 147, 148) that feeds processing gas to the interior of the device main body (141); a processing gas circulation means (148) that circulates used processing gas (33) used in the device main body (141) to the processing gas feed means; and a carbon monoxide processing device (170) that adjusts the carbon monoxide concentration in the processing gas in a manner so as to reduce the carbon monoxide concentration in the processing gas.

Abstract: Provided is a slag removal device for a blow pipe, that reduces the risk of pipe breakage, etc., and is capable of achieving easy and reliable slag removal using a simple device configuration. The slag removal device comprises a blow pipe (30) that injects auxiliary fuel pulverized coal, together with hot air, from a tuyere (22) for a blast furnace main body (20) that produces pig iron from iron ore. The slag removal device for a blow pipe including a component that melts on to the pulverized coal slag as a result of the hot air and/or the combustion heat of the pulverized coal comprises a fluid jet nozzle (80) that sprays fluid towards a slag adhesion area inside the blow pipe (30).

Abstract: Provided is a blow-pipe structure for a blast furnace facility configured so as to be capable of suppressing slag adhesion by using a simple structure, even if pulverized coal with an unadjusted softening temperature is used. The blow-pipe structure is attached to a tuyere in a blast furnace main body that produces pig iron from iron ore. The blow-pipe structure injects auxiliary fuel pulverized coal together with hot air and slag from the pulverized coal containing a component that is melted by the hot air and/or heat from the combustion of the pulverized coal combustion heat. The blow-pipe structure has an internal/external double pipe structure having an internal pipe that continues from a header pipe that supplies the hot air, to the vicinity of the tuyere and opens, said internal pipe being provided inside an external pipe that continues from the header pipe to the tuyere.

Abstract: Provided is a blow-pipe structure for a blast furnace facility configured so as to be capable of suppressing slag adhesion by using a simple structure, even if pulverized coal with an unadjusted softening temperature is used. The blow-pipe structure is attached to a tuyere for a blast furnace main body that produces pig iron from iron ore, said blow-pipe structure injecting auxiliary fuel pulverized coal together with hot air, and slag from the pulverized coal containing a component that is melted by the hot air and/or heat from combustion of the pulverized coal. A resisting element that increases flowpath resistance on the pipe inside wall surface side and concentrates the flows of the hot air and the pulverized coal to the flowpath axis center is provided on the downstream side of an injection lance that inserts pulverized coal into the blow pipe.

Abstract: Provided is a slag removal device for a blast furnace, capable of readily and reliably achieving slag removal using a simple device configuration, even when pulverized coal is used that has not had the softening temperature thereof adjusted, and capable of reducing as much as possible the risk of pipe damage, etc. The slag removal device for a blow pipe is provided in a blow pipe that injects auxiliary fuel pulverized coal together with hot air from a tuyere for a blast furnace main body that produces pig iron from iron ore. A jet nozzle that injects solids having a higher fusion point than the temperature in the vicinity of the tuyere and having a particle diameter greater than that of the pulverized coal, into pulverized coal that flows inside the blow pipe and into the hot air, is provided in the slag removal device.

Abstract: A pulverized-coal injection device is configured so as to inject pulverized coal from a tuyere of a blast-furnace main unit) together with heated, compressed injection air, and upgraded coal that has a self-heating property and that is upgraded from low-grade coal is used as a raw material for the pulverized coal. In addition, a heat exchanger is provided as a heat transporting unit for transporting heat due to a self-heating effect of this upgraded coal to a site requiring heat. This heat exchanger heats intake air by using the heat due to the self-heating effect of the upgraded coal that passes through the pulverized-coal supplying pipe to perform heat exchange with, for example, air that is taken into an injection-air feeding device. Furthermore, a deactivating unit for deactivating the upgraded coal such that a predetermined level of the self-heating effect thereof is retained may be provided.

Abstract: This blast furnace installation is configured such that when pulverized coal, which has been prepared by pulverizing high-grade coal, is pneumatically conveyed into a supply tank by a combustion gas, pulverized coal, which has been prepared by drying, dry-distilling, cooling, and pulverizing low-grade coal with a drying device, a dry-distillation device, a cooling device, and a pulverization device, is supplied from a storage tank by a feeder and pneumatically conveyed into the supply tank by a nitrogen gas, and then the pulverized coals in the supply tank are pneumatically conveyed from a supply line into an injection lance by a carrier gas, a control unit controls the feeders so as to gradually increase the supply amount of pulverized coal while maintaining the total amount of supply amount of pulverized coal and supply amount of pulverized coal to be supplied to the tuyere at a prescribed amount.

Abstract: Provided is a method for preparing blast furnace blow-in coal that can, at a low cost, obtain blast furnace blow-in coal that suppresses occlusion by blast furnace blow-in ash or accretion of blast furnace blow-in ash in a pathway leading to a tuyere of a blast furnace main body, while suppressing a decrease in the amount of heat release. The method includes selecting first and second coal types satisfying conditions (S2, S3), on the basis of the CaO content in the ash when the oxides of Al, Si, Ca, and Mg in the ash is 100 wt % and the Al2O3 content in the ash is 20 wt %, deriving the mixing ratio of the first and second coal types that results in the CaO content in the ash of the mixed coal being at least 40 wt % (S4), and mixing the first and second coal types (S5) at the mixing ratio.

Abstract: The present invention is provided with: a first processing device main body (111) that processes carbonized coal (1) by means of processing gas (103) of which the oxygen concentration has been adjusted by blowers (113,115); a second processing device main body (121) that processes primary processed carbonized coal (2a), which results from being processed at the first processing device main body, by means of air (102) fed by a blower (122); a second-processing-gas state detection means that detects the state of the air used within the second processing device main body; and a control device (130) that, on the basis of information from the second-processing—gas state detection means, controls the blowers (113,115) in a manner so as to adjust the oxygen concentration in the processing gas when the state of the air has diverged from a predetermined state.

Abstract: This blast furnace facility is provided with: a blast furnace main body (110); starting material charging means (111-113) that charge a starting material (1) containing iron ore and coke into the interior of the blast furnace main body (110) from the apex thereof; hot airflow blow-in means (114, 115) that blows in a hot airflow (101) from a tuyere to the interior of the blast furnace main body (110); and blast-furnace-blow-in charcoal supply means (120-129) that blow in blast-furnace-blow-in charcoal (11) from the tuyere to the interior of the blast furnace main body (110). The blast-furnace-blow-in charcoal supply means (120-129) blow in a blast-furnace-blow-in charcoal (11) having an oxygen atom content (on a dry basis) of 10-20 wt % and an average pore size of 10-50 nm.

Abstract: On the basis of data obtained by means of analyzing coal, a first and second coal type satisfying conditions are selected, the ash melting point of the mixed coal resulting from mixing the first and second coal types is derived on the basis of a four-dimensional state diagram for SiO2—CaO—MgO-20% Al2O3, on the basis of the ash melting point of the mixed coal and the four-dimensional state diagram, an additive causing the ash melting point of the mixed coal to be at least 1400° C. at the lowest quantity when added to the mixed coal is selected from SiO2, MgO, and CaO, the addition quantity of the additive is derived, the first coal type and second coal type are mixed to result in the mixed coal, and the addition quantity of the additive is added to the mixed coal.

Abstract: In a method for gas treatment of coal wherein coal (1, 2) is loaded on a moving mesh conveyor (111, 112) having a quadrilateral mesh and heated gas (11, 12) is circulated from above and below so as to bring the heated gas (11, 12) into contact with the coal (1, 2) via the mesh of the mesh conveyor (111, 112), two layers of coal for lower level stacking (1A, 2A) having a diameter (Dl) that is greater than twice the length (Lss) of the short side of the mesh of the mesh conveyor (111, 112) are loaded on the mesh of the mesh conveyor (111, 112) and coal for upper level stacking (1B, 2B) having a diameter (Du) that is twice said length (Lss) or less is loaded on the coal for lower level stacking (1A, 2A).

Abstract: Provided is a method for producing carbonized coal that enables production of carbonized coal in which the mercury content is reduced and excessive reduction of the volatile matter content is suppressed without carrying out complicated work. The method includes acquiring industrial analysis and elemental analysis data about raw coal (S11); performing a computation by using an amount of heat (A) obtained from the industrial analysis data or Dulong's formula, a fuel ratio (B) based on the industrial analysis data, a hydrogen content (C) in relation to the carbon content based on the elemental analysis data, and an oxygen content (D) in relation to the carbon content based on the elemental analysis data (S12); and deriving a carbonization temperature (T) of the raw coal and setting a temperature for carbonizing the raw coal on the basis of the carbonization temperature (T) of the raw coal (S13).

Abstract: In blast-furnace-blow-in charcoal that is blown in from a tuyere to the interior of a blast furnace main body of a blast furnace facility, the oxygen atom content (on a dry basis) is 10-20 wt % and the average pore size is 10-50 nm.

Abstract: A method for producing blast-furnace blowing coal to be blown through a tuyere into the interior of the blast-furnace body of a blast furnace, wherein: the composition and melting point of the ash from the coal are analyzed in advance; the composition of the blast-furnace slag is analyzed in advance; the blast-furnace slag contains more calcium oxide than the coal ash does; and the coal and the blast-furnace slag are mixed, on the basis of the composition and melting point of the coal ash and the composition of the blast-furnace slag, and in a manner such that the amount of calcium oxide contained in a quaternary system phase diagram including silicon dioxide, magnesium oxide, aluminum oxide and calcium oxide, which are the principal components of the coal ash and the blast-furnace slag, causes the melting point of the ash to be 1400° C. or higher.

Abstract: A blast furnace installation (100) equipped with a blast furnace body (110), a hot air blowing means (114, 115, etc.) for blowing hot air into the blast furnace body (110) through a tuyere, and a pulverized coal supply means for supplying pulverized coal (2) into the blast furnace body (110) through the tuyere. The pulverized coal (2) is obtained by means of dry distillation of low-grade coal. The pulverized coal supply means is equipped with: a pneumatic conveying means (115-120) for pneumatically conveying the pulverized coal (2) to the tuyere by means of a carrier gas (107) made of a mixture of air (106) and an inert gas (102); a temperature sensor (121) for detecting the temperature of the carrier gas (107) near the tuyere; and a control unit (122) for adjusting the mixing ratio between the air (106) and the inert gas (102) in the carrier gas (107) of the pneumatic conveying means (115-120) on the basis of information from the temperature sensor (121).

Abstract: A rotary kiln-type coal dry-distillation device that: rotatably supports an inner tube inside an outer tube; supplies heating gas to the interior of the outer tube; moves dried coal from one end side of the inner tube to the other end side, and agitates and dry-distills the dried coal under heat by supplying the dried coal from the one end side of the inner tube to the interior, and rotating the inner tube; sends out dry-distilled coal and dry-distilled gas from the other end side of the inner tube; and has provided therein a pulverized coal supply device that supplies pulverized coal having a particle diameter of no more than 100 ?m to the interior of the inner tube, such that the volume of the pulverized coal is 1-10 wt % relative to the amount of dry-distilled coal sent from the other end side of the inner tube.

Abstract: A blast furnace (100) is equipped with: a blast-furnace body (110); material-insertion means (111-113) for inserting a material (1) containing iron ore and coal into the interior of the blast-furnace body from the top section thereof; hot-air blowing means (114, 115) for blowing hot air (101) into the interior of the blast-furnace body through the tuyere thereof; and blast-furnace-blowing-coal supply means (120-129) for blowing blast-furnace-blowing coal (11) into the interior of the blast-furnace body through the tuyere thereof. Therein, the blast-furnace-blowing-coal supply means blow a blast-furnace-blowing coal having the proportion of oxygen atoms contained therein (dry base) set to 10-20 wt %, and the average pore diameter set to 10-50 nm, while the hot-air blowing means measures the melting point of the ash in the material in advance, and blows hot air which is 100-150° C. lower than the melting point of the ash.

Abstract: Modified coal production equipment comprising: first oxygen adsorption speed measuring means (141-144, 149a, 149b), etc., that sort dried coal (3) dried in a drying device (112), and find the oxygen adsorption speed (Vd) of the dried coal (3); second oxygen adsorption speed measuring means (145-148, 149a, 149b) that sort modified coal (7) deactivated by an deactivation treatment device (130), and find the oxygen adsorption speed (Vr) of the modified coal (7); and an arithmetic control device (150) that calculates the oxygen adsorption speed ratio (N) from formula (Vr?Vd)/Vd=N, on the basis of Vd and Vr, and, if N>Ns (a standard value), reads from a map the increased oxygen concentration value (Oa) in a processing gas (106) corresponding to N, calculates a revised oxygen concentration value (Oc) on the basis of the current oxygen concentration value (Op) and Oa, and controls blowers (133, 135) so as to reach Oc.

Abstract: The coal dry distillation device is provided with a dry distillation device of their invention main body which is provided with an inner tube to which the dry coal is supplied and an outer tube which covers the inner tube, and which indirectly heats the dry coal in the inner tube by means of a heating gas supplied to the outer tube and generates dry-distilled coal and dry distillation gas. This coal dry distillation device is provided with a mercury adsorption suppressing means which suppresses adsorption of mercury contained in the dry distillation gas into the dry-distilled coal, wherein the mercury adsorption suppressing means is an exhaust tube which discharges a gas inside the inner tube. The gas inlet port of the exhaust tube is arranged in a region between the substantially central portion in the longitudinal direction and the coal heating unit outlet in the inner tube.