JP6904322B2 - How to use hopper equipment - Google Patents

Description

The present invention relates to a method of using a blast furnace raw material hopper facility used for drying a blast furnace raw material using the exhaust heat of a cooler.

In a blast furnace, blast furnace raw materials such as sinter, iron ore, and lump coke are charged into the furnace from the top of the furnace, and high-temperature air is blown into the furnace from the tuyere provided at the bottom of the furnace to burn the coke. Using the heat generated by this combustion and CO gas, sinter and iron ore are reduced and melted to produce hot metal. The blast furnace raw material charged from the top of the furnace is adjusted to a particle size of several mm to several tens of mm and charged into the furnace. The combustion gas generated by the combustion of coke in the lower part of the furnace passes through the gaps between the granular blast furnace raw materials filled in the furnace and rises toward the top of the furnace. Since heat is supplied to the blast furnace raw material in the blast furnace by heat transfer by this combustion gas, the temperature rise of the blast furnace raw material becomes unstable unless the flow of the combustion gas in the furnace is in an appropriate state, and the sinter It interferes with the reduction and melting of iron ore.

Therefore, in order to maintain the flow of combustion gas in an appropriate state, a furnace top charging device and a furnace top charging method that can charge a blast furnace raw material of an appropriate particle size to an appropriate position in the furnace at the time of charging the blast furnace raw material. Is under development. However, even if the blast furnace raw material is charged using such a blast furnace raw material charging device or charging method, if the powdered blast furnace raw material is mixed in the blast furnace raw material itself, the gap between the blast furnace raw materials due to the powdered blast furnace raw material Is buried, which obstructs the flow of combustion gas and makes it difficult to maintain the flow of combustion gas in an appropriate state.

The blast furnace raw material includes a blast furnace raw material that is manufactured in a sintering machine or a coke oven and the particle size is adjusted and then sent directly to the blast furnace raw material tank, and a blast furnace raw material that is manufactured in a sintering machine or a coke oven and the particle size is adjusted. There are blast furnace raw materials that are stored in an open-air storage place called a yard, then collected and sent to the blast furnace raw material tank. Of these, the blast furnace raw material that is stored in the yard and then sent to the blast furnace raw material tank is inevitably moistened by rainwater or the like during storage in the yard, and the water content may exceed 10% by mass.

In the case of a blast furnace raw material having a high water content, the powdery blast furnace raw material adheres to the granular blast furnace raw material due to moisture. Therefore, even if the particle size is adjusted by a sieve or the like, the powdery blast furnace raw material cannot be separated and removed from the granular blast furnace raw material. Occurs. Further, since the powdery blast furnace raw material containing water easily adheres to the sieve net itself, it may cause clogging of the sieve, and further, it becomes difficult to sift the blast furnace raw material.

When the granular blast furnace raw material to which the powdery blast furnace raw material that was not separated and removed by the sieve is transferred to the furnace top and charged into the furnace, it is dried by the heat in the furnace and the powdery blast furnace raw material is granular. Depart from the surface of the blast furnace raw material. This powdery blast furnace raw material enters the gap between the blast furnace raw materials and obstructs the flow of combustion gas.

Therefore, it can be said that the technique for removing the powdery blast furnace raw material adhering to the blast furnace raw material is as important as the blast furnace raw material charging technique. In order to remove the powdery blast furnace raw material adhering to the blast furnace raw material, the powdery blast furnace raw material can be separated and removed from the blast furnace raw material by a sieve or the like by drying the blast furnace raw material having a large water content.

As a technique for drying a blast furnace raw material, Patent Document 1 states that a blast furnace raw material having a water content of 0.01% by mass or less and 50 ° C. or higher and a blast furnace raw material having a water content of 0.50% by mass or more are hoppers. A technique is disclosed in which blast furnace raw materials having a water content of 0.50% by mass or more are dried by alternately charging the blast furnace. According to Patent Document 1, the position of the deposition surface of the blast furnace raw material in the hopper facility is measured with a level meter, and when the deposition surface measured by the level meter becomes equal to or less than a predetermined value, the water content in the hopper is 0. It is disclosed that blast furnace raw materials of 01% by mass or less and blast furnace raw materials having a water content of 0.50% by mass or more are alternately charged.

Further, Patent Document 2 discloses a technique for drying a blast furnace raw material stored in a yard by sensible heat of a produced high-temperature sinter. According to Patent Document 2, the blast furnace raw material conveyed from the yard by the conveyor is put into the hopper equipment, and the blast furnace raw material is placed on the sinter that is cooled by the cooler device from the hopper equipment. A technique for heating and drying a blast furnace raw material transported from a yard by the actual heat of a high-temperature sinter is disclosed.

JP-A-2018-70958 JP-A-2017-137531

In the technique disclosed in Patent Document 2, since the high-temperature sintered ore directly sent from the sinter is placed, the temperature inside the cooler device is very high, and when the amount of blast furnace raw material in the hopper equipment is reduced, the cooler device is used. There is a problem that the high-temperature gas inside blows up inside the hopper equipment, and the rubber parts of the conveyor that feeds the blast furnace raw material into the hopper equipment are deteriorated by the high-temperature gas, and the transportation of the blast furnace raw material becomes unstable. Further, since rubber parts are used as the sealing material in the upper part of the hopper equipment, there is also a problem that these sealing materials are deteriorated by the high temperature gas and a sealing defect occurs.

As disclosed in Patent Document 1, when the deposition surface in the hopper equipment measured by the level meter becomes equal to or less than a predetermined value, the blast furnace raw material is charged into the hopper equipment, so that the blast furnace raw material is used in the cooler device. It is possible to suppress the blowing up of high temperature gas to some extent. However, when the blast furnace raw material is suspended in the hopper equipment and the filling amount of the blast furnace raw material is partially reduced in the lower part of the suspended state that is not measured by the level meter, high temperature gas blows up from the position in the hopper equipment. There is a risk.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a method for stably using the hopper equipment by suppressing deterioration of rubber parts used in the upper part of the hopper and the conveyor. is there.

The features of the present invention for solving such a problem are as follows.
(1) A method of using a hopper facility for placing a blast furnace raw material on a sintered ore directly sent from a sinter to a cooler. The hopper facility includes a storage unit for accommodating the blast furnace raw material and the blast furnace. A head chute that guides the raw material to the accommodating portion, a conveyor that conveys the blast furnace raw material to the head chute, a discharge slope that discharges the blast furnace raw material contained in the accommodating portion onto the sinter, and the head. The head chute has a gate for opening and closing a connection portion between the chute and the accommodating portion, the head chute includes a temperature detection unit for detecting the temperature inside the head chute, and the temperature detection unit has a first threshold value or higher. When a temperature less than the threshold value of 2 is detected, the transfer speed of the blast furnace raw material is increased, and when the temperature detection unit detects a temperature equal to or higher than the second threshold value, the conveyor is stopped and the open state is described. How to use the blast furnace equipment to close the gate.

By implementing the method of using the hopper equipment according to the present invention, it is possible to suppress the high temperature gas in the cooler device from blowing up to the head chute, thereby suppressing the deterioration of the rubber parts used in the upper part of the hopper and the conveyor. it can.

FIG. 1 is a schematic view showing an example of a drying processing line 10 including a hopper equipment 40 in which the method of using the hopper equipment according to the present embodiment can be implemented. It is sectional drawing of the hopper equipment 40 seen from the front in the conveyor transport direction. It is sectional drawing which saw from the side of the hopper equipment 40 in the conveyor transport direction. FIG. 5 is a schematic cross-sectional view seen from the front in the conveyor transport direction of the hopper equipment 70 in a state where the connection portion 64 is closed by the head chute shutter 50. FIG. 5 is a schematic cross-sectional view seen from the front in the conveyor transport direction of the hopper equipment 70 in a state where the accommodating portion 46 and the exhaust heat recovery equipment 78 are communicated with each other.

Hereinafter, the present invention will be described in detail through embodiments of the invention. In the method of using the hopper equipment according to the present embodiment, an example in which a yard sintered ore having a high moisture content, which is temporarily stored in a yard and exposed to rainwater or the like, is used as a raw material for a blast furnace to be housed in the hopper equipment. It will be explained in. However, the raw material for the blast furnace is not limited to the yard sintered ore, and may be iron ore or coke breeze having a high water content.

FIG. 1 is a schematic view showing an example of a drying processing line 10 including a hopper equipment 40 in which the method of using the hopper equipment according to the present embodiment can be implemented. In the drying treatment line 10, the sinter 12 for producing the sinter and the crusher 16 for adjusting the particle size by crushing the high temperature (for example, 500 to 800 ° C.) sinter 14 produced by the sinter 12 are crushed. A cooler device 20 for cooling the sinter whose grain size has been adjusted by the crusher 16 to a predetermined temperature (for example, 100 to 200 ° C.), and a hopper facility 40 for charging the yard sinter into the cooler device 20. Has. The cooler device 20 is composed of, for example, a first zone to a fourth zone. A # 1 cooler fan (# 1CF) 22 is provided in the first zone. Similarly, the # 2 cooler fan (# 2CF) 24 is in the second zone, the # 3 cooler fan (# 3CF) 26 is in the third zone, and the # 4 cooler fan (# 4CF) 28 is in the fourth zone. Each is provided.

Further, the cooler device 20 may be equipped with a boiler 18 that takes in high-temperature air discharged when the high-temperature sinter 14 is cooled and recovers the exhaust heat. In the cooler device 20 of the present embodiment, the boiler 18 is attached to the first zone. Therefore, in the example shown in FIG. 1, the first zone is the exhaust heat recovery zone, and the second to fourth zones are the non-exhaust heat recovery zones.

The high-temperature sinter 14 produced by the sinter 12 is placed in a layer on the trough of the cooler device 20 and cooled by each cooler fan in the first zone, the second zone, the third zone and the fourth zone. To. Cooling the high-temperature sinter by the cooler device 20 is the cooling step in the present embodiment.

The yard sinter 30 is housed in the hopper equipment 40. The yard sinter 30 housed in the hopper equipment 40 is cut out from the hopper equipment 40 and layered on a layer of sinter that is cooled between the second zone and the third zone of the cooler device 20. It is placed in.

The suction type or push type cooler fans 22 to 28 provided in each zone form an updraft flowing from the lower side to the upper side. Due to this updraft, the high-temperature air heated by the high-temperature sinter in the lower layer rises, and the yard sinter placed on the layer of the high-temperature sinter is heated and dried. As a result, the yard sinter having a high water content can be dried without using a new heat source.

FIG. 2 is a schematic cross-sectional view of the hopper equipment 40 viewed from the front in the conveyor transport direction showing an example of the hopper equipment to which the method of using the hopper equipment according to the present embodiment can be applied, and FIG. 3 is a schematic cross-sectional view of the conveyor of the hopper equipment 40. It is sectional drawing which was seen from the side surface in the transport direction. The configuration of the hopper equipment 40 and its surroundings will be described with reference to FIGS. 2 and 3. The hopper equipment 40 includes a conveyor 42, a head chute 44, an accommodating portion 46, a discharge slope 48, and a head chute shutter 50. The conveyor 42 is provided so that one end thereof is inside the head chute 44. The conveyor 42 conveys the yard sinter 30 having a high water content stored in the yard (not shown) to the head chute 44. The conveyor 42 has a drive pulley 52, a driven pulley 54, and a belt 56.

The drive pulley 52 receives a driving force from a driving means (not shown) and drives the belt 56 at a desired speed in the direction of arrow 66. The driven pulley 54 applies a predetermined tension to the belt 56 and drops the yard sinter 30 adhering to the belt 56.

The head chute 44 receives the yard sinter 30 conveyed by the conveyor 42 and guides the yard sinter 30 to the accommodating portion 46. The shape of the head chute 44 at the position where the transported yard sintered ore 30 falls is a staircase shape having two corners 58. The yard sinter 30 conveyed by the conveyor 42 is deposited in each corner 58, and the deposited yard sinter 30 forms an inclined surface. After the inclined surface is formed, the yard sinter 30 conveyed by the conveyor 42 is guided by the inclined surface and falls into the accommodating portion 46. By forming the inclined surface of the yard sinter 30 in this way, it is possible to prevent the wall surface of the head chute 44 from being worn by the yard sinter 30 conveyed by the conveyor 42.

The head chute 44 includes a non-contact type head chute thermometer 60 that detects the temperature inside the head chute 44. The head chute thermometer 60 is an example of a temperature detection unit, and a contact type thermometer may be used as long as it can detect the temperature inside the head chute 44. However, since the contact type thermometer has a slow temperature detection speed, it is preferable to use a non-contact type thermometer.

The accommodating portion 46 has a shape in which an upper portion having a cylindrical shape and a lower portion having a truncated cone shape are connected. The yard sinter 30 is housed in the storage section 46. Two level totals 62 are provided on the top surface of the accommodating portion 46. The level meter 62 emits microwaves downward and measures the position of the deposited surface of the yard sintered ore 30 at the position where the level meter 62 is provided. The rotation speed of the drive pulley 52 may be controlled by using the position of the deposit surface measured by the level meter 62.

A shutter 50 for head chute is provided at the connection portion 64 between the head chute 44 and the accommodating portion 46. In the example shown in FIG. 2, the head chute shutter 50 is in the open state, and the head chute shutter 50 is closed by sliding in the direction of arrow 68. In this way, the connecting portion 64 is opened and closed by sliding the shutter 50 for head chute in the direction of arrow 68 or in the opposite direction. Since the transport amount and the discharge amount of the yard sinter 30 are adjusted so that the deposited surface of the yard sinter 30 does not reach the connection portion 64, the head is provided by providing the head chute shutter 50 at the connection portion 64. It is possible to suppress the biting of the yard sintered ore 30 when the chute shutter 50 is opened and closed. The head chute shutter 50 is an example of a gate that opens and closes the connection portion 64, and the gate is not limited to the shutter, and a valve may be used.

The discharge slope 48 has a tubular shape with a slope formed downward, and the yard sinter 30 accommodated in the accommodating portion 46 is placed on the sinter 14 to a desired thickness. By placing the yard sinter 30 on the sinter 14 transported by the trough 29 in this way, the high temperature air heated by the high temperature sinter 14 rises and the water content is high. The yard sinter 30 is heated and dried.

The temperature inside the cooler device 20 for cooling the sinter 14 directly sent from the sinter 12 is 200 to 600 ° C. Therefore, the temperature of the high temperature gas in the cooler device 20 is also 200 to 600 ° C. On the other hand, since the temperature at which the rubber parts are thermally deteriorated is 150 to 200 ° C., when the high temperature gas blows up to the head chute 44 through the discharge slope 48 and the accommodating portion 46, it is made of rubber used for the belt 56 and the sealing member. Parts are thermally deteriorated. When the belt 56 is thermally deteriorated, the transportation of the yard sinter 30 becomes unstable. Further, the life of the belt 56 is shortened, and the maintenance cost for replacement is increased.

Further, if the rubber parts used for the sealing member are thermally deteriorated, a sealing defect occurs. When a seal failure occurs, a part of the fine powder of the yard sintered ore 30 to be conveyed may enter the drive unit (not shown) of the conveyor 42, causing a malfunction of the drive unit.

In the method of using the hopper equipment according to the present embodiment, when the temperature detected by the head chute thermometer 60 is continuously or intermittently monitored and the temperature becomes equal to or more than the first threshold value and less than the second threshold value. It is probable that the number of yard sintered ores 30 accommodated in the accommodating portion 46 decreased, and the high temperature gas in the cooler device 20 began to blow up to the head chute 44. Therefore, the rotation speed of the drive pulley 52 is increased to increase the transport speed of the yard sinter 30, and the yard sinter 30 accommodated in the accommodating portion 46 is increased. As a result, the yard sinter 30 housed in the housing section 46 increases, and the high temperature gas is suppressed from being blown up to the head chute 44.

Further, in the method of using the hopper equipment according to the present embodiment, the temperature detected by the head chute thermometer 60 is continuously or intermittently monitored, and the temperature becomes equal to or higher than the second threshold value higher than the first threshold value. When this happens, the conveyor 42 is stopped and the head chute shutter 50 is slid to close the connecting portion 64. This prevents the high temperature gas from blowing up on the head chute 44.

Since the yard sinter 30 stored in the yard is transported to the head chute 44, the head chute 44 communicates with the outside air. Therefore, when the accommodating portion 46 is sufficiently filled with the yard sintered ore 30, the temperature inside the head chute 44 becomes close to the outside air temperature. For example, in the present embodiment, the first threshold value is 60 ° C., the second threshold value is 80 ° C., and when the temperature inside the head chute 44 becomes 60 ° C. or more and less than 80 ° C., the yard sinter 30 is transported. I increased the speed.

For example, while the yard sinter 30 is being conveyed to the accommodating portion 46 at a conveyor transfer speed of 180 t / h and being discharged from the discharge slope 48 at a discharge rate of 180 t / h, the inside of the head chute 44 is being discharged. When the temperature of the yard sintered ore 30 became equal to or more than the first threshold value of 60 ° C. and lower than the second threshold value of 80 ° C., the transport speed of the yard sinter 30 was increased to 240 t / h. As a result, the yard sinter 30 housed in the accommodating portion 46 increases at a rate of 60 t / h, so that the yard sinter 30 housed in the accommodating portion 46 increases. The increased yard sinter 30 fulfills the sealing effect of the accommodating portion 46, and the blowing of high temperature gas to the head chute 44 is suppressed. If the blow-up of the high-temperature gas is suppressed, the head chute 44 communicates with the outside air, so that the temperature inside the head chute 44 decreases with the passage of time, and then becomes a temperature equal to or lower than the first threshold value.

On the other hand, since the sinter 14 has a high temperature, the temperature inside the head chute 44 rises even if the transport speed of the yard sinter 30 is increased to 240 t / h, and the temperature inside the head chute 44 becomes the second threshold value 80. When the temperature rises above ° C., the conveyor 42 is stopped and then the head chute shutter 50 is slid to close the connecting portion 64. As a result, the connection portion 64 is closed by the head chute shutter 50, so that the high temperature gas is prevented from blowing up to the head chute 44. If the high temperature gas is prevented from blowing up, the head chute 44 communicates with the outside air, so that the temperature inside the head chute 44 decreases with the passage of time, then falls below the second threshold value, and further, the first The temperature falls below the threshold value of.

As described above, in the method of using the hopper equipment according to the present embodiment, the temperature inside the head chute 44 is detected by the head chute thermometer 60, and the detected temperature is equal to or more than the first threshold value and less than the second threshold value. In this case, the transport speed of the yard sintered ore 30 is increased. As a result, the number of yard sinters 30 accommodated in the accommodating portion 46 increases, which can suppress the blowing of high-temperature gas to the head chute 44. Further, when the temperature detected by the head chute thermometer 60 becomes equal to or higher than the second threshold value higher than the first threshold value, the head chute shutter 50 is slid to close the connection portion 64. As a result, it is possible to prevent the high temperature gas from blowing up to the head chute 44. By suppressing and preventing the high temperature gas from blowing up to the head chute 44, deterioration of the rubber parts used for the belt 56 of the conveyor 42 and the sealing member can be suppressed.

Further, in the method of using the hopper equipment according to the present embodiment, the head chute shutter 50 is slid when the threshold value becomes equal to or higher than the second threshold value. When the head chute shutter 50 is closed to prevent the high temperature gas from blowing up, the head chute shutter 50 also stops the transfer of the yard sinter 30 to the accommodating portion 46. On the other hand, since the discharge of the yard sinter 30 onto the sinter 14 continues, as a result, the accommodating portion 46 and the discharge slope 48 are emptied, and the accommodating portion 46 is filled with high temperature gas at 200 to 600 ° C. To do. When the head chute shutter 50 is opened in this state, high-temperature gas blows up to the head chute 44 and deteriorates the rubber parts. Therefore, in order to open the head chute shutter 50, it is necessary to perform some kind of recovery processing to lower the temperature inside the accommodating portion 46.

4 and 5 are cross-sectional views of the hopper equipment 70 to which the method of using the hopper equipment according to the present embodiment can be applied. A return process after closing the head shoot shutter 50 will be described with reference to FIGS. 4 and 5. In addition, in FIGS. 4 and 5, the same reference number is given to the member common to FIG. 2, and the duplicate description will be omitted.

In contrast to the hopper equipment 40 shown in FIG. 2, the hopper equipment 70 further includes a shutter 72 for an exhaust slope, a heat exhaust pipe 74, and a shutter 76 for a heat exhaust pipe. The discharge slope shutter 72 is provided on the discharge slope 48 to open and close the discharge slope 48. The exhaust heat pipe 74 is a pipe that connects the upper part of the accommodating portion 46 to the exhaust heat recovery equipment 78. The heat exhaust tube shutter 76 is provided on the heat exhaust tube 74. The heat exhaust pipe shutter 76 opens and closes the heat exhaust pipe 74, connects the accommodating portion 46 to the exhaust heat recovery facility 78 by opening the heat exhaust pipe shutter 76, and exhausts the accommodating portion 46 and the exhaust pipe 46 by closing the heat exhaust pipe shutter 76. The connection with the heat recovery equipment 78 is cut off.

FIG. 4 is a schematic cross-sectional view of the hopper equipment 70 in a state where the temperature inside the head chute 44 is equal to or higher than the second threshold value and the connection portion 64 is closed by the head chute shutter 50 as viewed from the front in the conveyor transport direction. .. In this state, the transport of the yard sinter 30 to the accommodating portion 46 is stopped, while the discharge of the yard sinter 30 is continued, so that the accommodating portion 46 and the discharge slope 48 are emptied, and the region concerned. Is filled with high temperature gas having a temperature of 200 to 600 ° C.

In this state, first, the discharge slope shutter 72 is slid to close the discharge slope 48. As a result, the high temperature gas in the cooler device 20 can no longer enter the discharge slope 48 and the accommodating portion 46. Further, since the yard sinter 30 of the discharge slope 48 is discharged, the discharge slope shutter 72 can be slid without biting the yard sinter 30. After closing the discharge slope 48, the heat exhaust pipe shutter 76 is opened. As a result, the accommodating portion 46 and the exhaust heat recovery equipment 78 communicate with each other.

FIG. 5 is a schematic cross-sectional view of the hopper equipment 70 in a state where the exhaust slope 48 is closed, the heat exhaust pipe shutter 76 is opened, and the accommodating portion 46 and the exhaust heat recovery equipment 78 are communicated with each other, as viewed from the front in the conveyor transport direction. .. Since the exhaust heat pipe 74 is connected to the exhaust heat recovery equipment 78, the heat of the accommodating portion 46 is recovered by the exhaust heat recovery equipment 78, and the temperature inside the accommodating portion 46 is lowered. After the temperature inside the accommodating portion 46 becomes lower than the second threshold value, the head chute shutter 50 is opened, the heat exhaust tube shutter 76 is closed, and the drive pulley 52 is rotated to accommodate the yard sintered ore 30. Transport to section 46. As described above, when the temperature becomes lower than the second threshold value, the yard sintered ore 30 is charged into the accommodating portion 46 in a state where the transport speed is high until the first threshold value. The gas can be discharged from the heat exhaust pipe 74, and the temperature of the accommodating portion 46 tends to decrease. The fact that the temperature inside the accommodating portion 46 is lower than the second threshold value means that the time change of the temperature inside the accommodating portion 46 with the heat exhaust tube shutter 76 open is grasped in advance, and the heat exhaust tube is exhausted. It can be grasped from the time when the shutter 76 is opened. Further, an in-accommodation thermometer 61 capable of measuring the temperature inside the accommodating portion 46 may be provided in the accommodating portion 46.

After a predetermined amount of the yard sinter 30 is stored in the accommodating portion 46, the discharge slope shutter 72 is opened to discharge the yard sinter 30 from the discharge slope 48 onto the high temperature sinter 14. The fact that a predetermined amount of yard sinter 30 is contained in the accommodating portion 46 can be grasped from the measured value of the level meter provided in the accommodating portion 46. In this way, the hopper equipment 70 can be returned to the state before the head chute shutter 50 is closed. The hopper equipment 70 shown in FIGS. 4 and 5 shows an example of equipment for lowering the temperature inside the accommodating portion 46 after closing the shutter 50 for head chute, and is an application example of the present invention. In addition, the temperature inside the accommodating portion 46 may be lowered by stopping the supply of the sinter 14 to the cooler device 20 and lowering the overall temperature inside the cooler device 20. Further, the exhaust heat may be discharged directly from the accommodating portion 46 to the outside air, and in that case, the tip of the exhaust heat pipe 74 from the accommodating portion 46 may be connected to the outside air.

10 Drying line 12 Sintering machine 14 Sintering ore 16 Crusher 18 Boiler 20 Cooler equipment 22 # 1 Cooler fan 24 # 2 Cooler fan 26 # 3 Cooler fan 28 # 4 Cooler fan 29 Traf 30 yards Sintered ore 40 Hopper equipment 42 Conveyor 44 Head chute 46 Containment section 48 Discharge slope 50 Head chute shutter 52 Drive pulley 54 Driven pulley 56 Belt 58 Corner 60 Head chute thermometer 61 Containment section thermometer 62 Level meter 64 Connection part 66 Arrow (yard sintered ore) Supply direction)
68 Arrow (head shoot shutter closing direction)
70 Hopper equipment 72 Shutter for exhaust slope 74 Exhaust heat pipe 76 Shutter for exhaust heat pipe 78 Exhaust heat recovery equipment

Claims (1)

It is a method of using the hopper equipment that places the blast furnace raw material on the sintered ore sent directly from the sinter to the cooler.
The hopper equipment includes an accommodating portion for accommodating the blast furnace raw material, a head chute for guiding the blast furnace raw material to the accommodating portion, a conveyor for transporting the blast furnace raw material to the head chute, and a blast furnace accommodated in the accommodating portion. It has a discharge slope for discharging the raw material onto the sinter, and a gate for opening and closing the connection portion between the head chute and the accommodating portion.
The head chute includes a temperature detection unit that detects the temperature inside the head chute, and when the temperature detection unit detects a temperature equal to or greater than a first threshold value and less than a second threshold value, the transfer speed of the blast furnace raw material is determined. A method of using a hopper facility, in which the conveyor is stopped and the gate in an open state is closed when the temperature detection unit detects a temperature equal to or higher than the second threshold value.

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