JPH02182818A - Apparatus for sequentially taking out sample in blast furnace - Google Patents

Abstract

PURPOSE:To safely and sequentially take out samples during furnace operation by arranging cooling water passage, load detecting stop device and sealing mechanism with the furnace to an outer cylindrical lance at the time of inserting the outer cylindrical lance into the furnace from a tuyere and taking out the sample with an inner cylindrical lance through the outer cylindrical lance. CONSTITUTION:The outer cylindrical lance 4 is inserted into the blast furnace 2 from the tuyere 3 and the tip part thereof is positioned at the suitable position. Then, the inner part of the outer cylindrical lance 4 is cooled with the cooling water through a water supplying hole 10 and water discharging hole 11, and the load detecting stop device 28 is arranged to stop insertion/pulling-out in the case of receiving large load, and the sealing mechanism 41 is fitted to hot blast supplying hole part in the tuyere to maintain the pressure in the furnace to high. The inner cylindrical lance 5 is reciprocated in this outer cylindrical lance 4 with a driving device 15, and the inner cylindrical lance 5 is inserted into the blast furnace 2, and the sample of molten material is taken with the tip arm thereof, and the tip arm is shifted on a sample receiving device 6 and rotated and the molten material is taken out. By repeating this reciprocating movement, the sampling of the molten material can be safely and sequentially executed.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an in-blast furnace sample j-pull continuous take-out device for safely and continuously taking out samples of molten material in a blast furnace during operation of a blast furnace.

(Prior Art) When manufacturing iron using a blast furnace, taking out a sample of the molten material inside the furnace during its operation is very important for controlling the situation inside the furnace.

Conventionally, a sample of the molten material inside a blast furnace could not be taken during operation, but only when hot air from the tuyere was stopped, that is, when the wind was at rest.

(Problem to be solved by the invention) However, in this type of sample extraction, the frequency of sample extraction is extremely low because the sample is taken out only during periods of wind cessation. I couldn't say I was going.

However, even if you try to take out a sample during operation, it is very dangerous because high-temperature hot air is sent to burn coke in the furnace, so it is not recommended to take out a sample during operation. This was completely impossible in the past.

Therefore, the present invention was created with the object of making it possible to safely and continuously take out samples of the molten material inside the blast furnace during operation of the blast furnace.

(Means for Solving the Problems) The present invention provides an apparatus for continuously taking out samples from the tuyere of the blast furnace, which continuously takes out the molten material in the furnace as a sample from the tuyere during operation of the blast furnace. An outer cylindrical lance that is inserted from the tip into the furnace, an inner cylindrical lance that passes through the outer cylindrical lance into the furnace and takes out the molten material as a sample, and a predetermined amount of the molten material sample taken out by the inner cylindrical lance. The outer lance consists of a sample receiving device that collects up to 100 ml of water, and a sealing mechanism that ensures the sealing of the blast furnace when the outer lance is inserted into the blast furnace. The inner cylindrical lance has an inner cylindrical lance tip bowl attached to its tip, and is formed to be slidable so that the inner cylindrical lance tip bowl can be moved from the blast furnace to the sample receiving device. A load detection and stop device is installed to stop the insertion and removal of the outer cylinder lance if a load greater than a predetermined value is applied when inserting and removing the outer cylinder lance into the interior. The inner cylindrical lance is formed so as to be made to have a higher pressure than the pressure inside the blast furnace, and the inner cylindrical lance is continuously slid back and forth by a driving device. By forming a multi-tube structure to form a water channel in which the sample is passed through the inner surface of the cylindrical lance to the distal end, passed through the outer surface of the outer cylindrical lance, and returned to the proximal end, the sample receiver is The device has a sealing valve on the outer lance side and a sample receiving packet on the opposite side to ensure a sealed state. A compressed gas inlet is provided between the sealing valve and the outer lance, and the sample receiving packet is placed on the side of the outer lance. itself,
By forming the inner cylinder lance to increase the internal pressure, the inner cylinder lance is formed to be slidable while being held by the guide at an angle that prevents the melt sample from spilling from the inner cylinder lance tip bowl attached to the tip of the inner cylinder lance. When the tip of the inner lance comes to the position of the sample receiving device, the guide is formed to release the guide so that it rotates at an appropriate angle. The above-mentioned problem is solved by sandwiching the circumferential surfaces of the drive rollers and rotating the drive rollers.

(Function) The apparatus for continuously taking out samples in a blast furnace according to the present invention is a blast furnace in which hot air is sent from a plurality of tuyeres provided around the periphery to produce iron, and an external cylindrical lance is inserted into the blast furnace from one of the tuyeres. Insert from the tip and stop at any appropriate position.

At this time, cooling water is flowed through the outer cylinder lance to cool it. This flow of cooling water is sent from the proximal end of the external lance to the inner surface of the external lance to the distal end, passes through the external surface of the external lance, and returns to the proximal side again for cooling. be carried out efficiently. Furthermore, at this time, the air pressure inside the sealing mechanism is made higher than the pressure inside the blast furnace to eliminate the blowout of the furnace gas from the blast furnace.

In addition, if a load exceeding a predetermined value is applied to the outer cylinder lance when it is inserted into or removed from the blast furnace, the load detection and stop device will stop the insertion and removal of the outer cylinder lance to prevent accidents. Try to prevent it.

Then, the inner cylinder lance with the inner cylinder lance tip bowl attached to the tip is passed through the outer cylinder lance and inserted into the blast furnace from the tip,
The molten material in the blast furnace is taken out as a sample, the inner cylindrical lance is slid back and the inner cylindrical lance tip bowl is moved to the sample receiving device, and at that position the inner cylindrical lance is rotated at an appropriate angle to transfer the molten material to the sample receiving device. By opening the container and sliding the inner cylinder lance back and forth appropriately several times, a predetermined amount of the molten material as a sample is collected in this receiving device.

Also, at this time, especially when the inner cylinder lance tip bowl moves to the sample receiving device, the gas inside the blast furnace passes through the outer cylinder lance and tries to blow out, but the pressure inside the sample receiving device is The pressure inside the furnace is increased to prevent this gas from blowing out. At that time, a sealing valve is placed on the outer cylindrical lance side of the sample receiving device, a sample receiving packet is placed on the opposite side to ensure a sealed state, and a compressed gas is inserted between the sealing valve and the outer cylindrical lance. Compressed nitrogen gas is sent from the mouth to make the pressure higher than the pressure inside the blast furnace, and the gas inside the furnace is blown out first.
Safety is achieved through a dual-prevention structure that prevents this in one step and then increases the air pressure inside the sample receiving packet itself to prevent its ejection in a second step.

Furthermore, when the inner cylinder lance itself slides, the guide holds the melt sample from the inner cylinder lance tip bowl to prevent it from spilling, and the inner cylinder lance tip cup comes to the position of the sample receiving device. Release the guide only when
Rotate the angle appropriately.

The inner cylinder lance slides by sandwiching the inner cylinder lance between the circumferential surfaces of an appropriate number of drive rollers, and by rotating these drive rollers, and sliding while allowing the inner cylinder lance itself to rotate. It is something that moves people.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

That is, the reference numeral 1 shown in the figure is a continuous sample taking device, which extracts samples from the tuyere 3 during the operation of the blast furnace 2 of the blast furnace.
It is designed so that the melt inside can be taken out continuously as a sample.

This continuous sample extraction device 1 includes an outer cylindrical lance 4 that is inserted into the furnace 2 from the tip 7 through the tuyere 3 of the blast furnace 2, and a molten material that passes through the outer cylindrical lance 4 and enters the furnace 2. It consists of an inner cylinder lance 5 for taking out the melt as a sample, and a sample receiving device 6 for storing the sample of the melt taken out by the inner cylinder lance 5 to a predetermined amount.

The outer cylindrical lance 4 has a cylindrical shape, and is formed so that cooling water can flow through the jacket (tube wall) of the outer cylindrical lance 4 up to the tip 7. As shown in FIG. 6, its specific structure is such that the cooling water is sent from the base end 8 side through the inner surface of the outer cylindrical lance 4 to the tip 7, and then is sent through the outer surface of the outer cylindrical lance 4. In order to form the water channel 9 so as to return to the proximal end 8 side again, a multi-pipe structure, as shown in the figure, a triple-pipe structure is used. A water supply port 10 and a drain port 11 are formed at the base end 8 of the outer cylindrical lance 4, respectively, to allow cooling water to flow therethrough.

The outer cylindrical lance 4 is inserted into the blast furnace 2 approximately horizontally from the tuyere 3 as shown in FIGS. 1 and 2. , blast furnace 2
The outer cylindrical lance 4 is very long in order to ensure a sealed state between the two. Therefore, an appropriate number of holders 12 are arranged at appropriate intervals to form the outer cylindrical lance 4 so as to be movable approximately horizontally.

This holder 12 is formed to be movable in the direction of movement of the outer cylindrical lance 4, and is moved to an appropriate position to receive the outer cylindrical lance 4. A rotatable roller 13 is arranged in the section, and the outer cylindrical lance 4 is moved into the blast furnace 2 while the pedestal 12 is stopped.
It is supported so that it can be inserted and removed freely.

On the other hand, the inner cylindrical lance 5 has an inner cylindrical lance tip bowl 14 attached to its tip, and this inner cylindrical lance tip bowl 14 is attached to the blast furnace 2.
It is configured to be slidable so that it can be moved from inside to the sample receiving device 6.

To describe the structure in more detail, the inner cylindrical lance 5 is formed to be pulled out from the blast furnace 2 through the outer cylindrical lance 4 by a drive device 15, and the sliding movement is performed within the outer cylindrical lance 4. Then, it passes through the sample receiving device 6 and is carried out on the lance guide rail 16.

For example, as shown in FIG. 9, this lance guide rail 16 is constructed by making long angle irons face each other back to back at an appropriate interval to form a guide groove 17, and bolts to maintain this interval. It is fixed by 18 mag. Since the lance guide rail 16 is long, for example, as shown in FIGS. 8 and 10, a support 19 is disposed approximately in the middle of the lance guide rail 16, and this support 19 is used as a lance guide. By being supported by the rail support cart 20, the lance guide rail 16 is prevented from being bent. In addition, this lance guide rail 16 is formed so that it can slide freely so that one of the two pieces is extrapolated from the other, thereby making the lance guide rail as a whole expandable and contractible, so that it can be easily moved during installation and movement. It is easy to handle.

On the other hand, as mentioned above, the inner cylinder lance 5 that slides horizontally on the lance guide rail 16 has the sample receiving device 6 attached to its tip, but the guide 21 is attached to the base end of the inner cylinder lance 5. The guide 21 is inserted into the guide groove 17 and rotated at a predetermined rotation angle to prevent the sample of the melt from spilling from the inner lance tip bowl 14 attached to the tip of the inner lance 5. It is formed so that it can be slid while being held.

Then, the inner cylinder lance tip bowl 14 is connected to the sample receiver 1 device 6.
When the lance reaches the position shown in FIG. A notch 22 is formed at the position of the guide 21 at the position moved to the device 6. At this time, the inner cylinder lance tip bowl 14 is rotated by gripping the inner cylinder lance 5 with a chuck 23, and this chuck 23 is operated by an operating rod 24 of a cylinder (not shown) using hydraulic or pneumatic pressure. As shown in FIG. 7, the linear motion is rotated by a link mechanism 25 that converts it into a rotational motion.

Further, the sliding of the inner cylinder lance 5 is achieved by sandwiching the inner cylinder lance 5 between the peripheral surfaces of an appropriate number of drive rollers 26 and 27 of the drive device 15, as shown in FIGS. 3 and 5. , motor 27
This is done by rotating these drive rollers by a. At this time, the driving rollers 26.2'7 are, for example, as shown in FIG. These driving rollers 26 and 27 sandwich the inner cylinder lance 5. As shown in FIG. 5, these driving rollers 26 and 27 have circumferential surfaces having an arcuate cross section, and are formed so as to clamp the inner cylindrical lance 5 in a forcedly rotatable manner.

On the other hand, the outer cylindrical lance 4 is equipped with a load detection and stop device 2 that stops the insertion and removal of the outer cylindrical lance 4 when a load larger than a predetermined value is applied when the outer cylindrical lance 4 is inserted into and removed from the blast furnace 2.
8 is arranged.

This load detection and stop device 28 has the following structure.

That is, as shown in FIG. 3 and FIG. A tube 31 is slidably inserted into the guide tube 31, and the sample receiving device 6 is connected to this guide tube 31. A detection plate 32 is fixed to the conduit 29 so as to be arranged laterally, and two detectors 33 are arranged so as to sandwich the detection plate 32 in the direction of movement of the outer cylinder lance 4. 32 and detector 33
Leave a slight gap between them. By doing so, when the outer cylindrical lance 4 is inserted into and removed from the blast furnace 2, if the outer cylindrical lance 4 moves back and forth due to the load at that time, the detection plate 32 will come into contact with the detector 33, so the pressure will be reduced. The detector 33 senses this and stops the movement of the outer cylinder lance 4.

Furthermore, although not shown, the outer lance 4 is equipped with a thermometer and a water flow meter, which determine the temperature and flow rate of the cooling water flowing through the water channel 9 of the outer lance 4 by δP1, and determine the reference safe value range. Even if the load exceeds the limit, the movement of the outer cylindrical lance 4 is stopped in the same way as the load detection and stop device 28. This is because, for example, if the water temperature rises, it is determined that the flow in the water channel 9 of the outer cylinder lance 4 is poor, and if left as it is, the outer cylinder lance 4 will melt and damage, so movement should be stopped and some kind of countermeasure taken. For example, if the flow rate is low, it is determined that the flow of the water channel 9 is poor or that cooling water is leaking somewhere in the outer cylindrical lance 4. If left as is, there is a risk of the aforementioned melting damage, etc., so the movement is stopped and some kind of treatment is taken at that time.

Further, the sample receiving device 6 has a sealing valve 34 on the side of the outer cylinder lance 4 and a sample receiving packet 35 on the opposite side to ensure a sealed state. Further, the sample receiving packet 35 is filled with nitrogen to extinguish the highly heated sample.

A compressed gas insertion port 36 is provided between the blockade valve 34 and the outer cylinder lance 4, that is, in the guide tube 31,
The inner body of the sample receiving packet 35 is also formed to increase the internal air pressure. With this configuration, the pressure inside the sample receiving device 6 is made higher than the pressure inside the blast furnace 2 in two stages: at the position of the blockade valve 34 and at the position of the sample receiving device 6, and the inner cylinder lance This is to prevent the furnace gas, etc. in the blast furnace 2 from blowing out through the outer cylindrical lance 4 when the blast furnace 5 is continuously slid back and forth by the drive device 15.

On the other hand, in order to insert the outer cylindrical lance 4 into the blast furnace 2, a sealing mechanism 41 is required to ensure the sealing between the outer cylindrical lance 4 and the blast furnace 2.

As shown in FIGS. 11 and 12, this sealing mechanism 41 is attached to the hot air feed portion of the tuyere 3, and from the tuyere 3 side, a cooling pipe 42, a jacket type % type % type, a freon seal type % type, a fluorocarbon seal type ball, etc. Valve 45 is connected and arranged,
Further, a sealing ring 46 is provided for sealing the outer cylinder lance 4 when it slides, and the outer cylinder lance 4 is formed so as to be inserted and slid therethrough.

Further, these are attached to the blast furnace 2 by means of a rod 53 so as to be able to move slightly in the vertical direction, and furthermore, the whole is attached to a rail 50 laid on a rail foundation 49.
The sealing mechanism 41 is mounted on a cart 51 placed above so as to be able to accommodate slight vertical movement of the sealing mechanism 41 by means of a spring 52.

When the outer cylinder lance 4 is pulled out from the blast furnace 2,
The high heat at that time is cooled down by a cooling pipe 42, and a jacket type ball valve 43 and a Teflon seal type ball valve 4 are used.
5, the blast furnace 2 is sealed to prevent the furnace gas from blowing out, and the dust scraper 44 placed between the jacket type ball valve 43 and the Teflon seal type ball valve 45, Remove the deposits attached around the outer cylinder lance 4.

Further, compressed nitrogen gas is fed into the dust scraper 44 from a compressed gas inlet 54 to make the internal pressure higher than the pressure inside the blast furnace 2 . This prevents the furnace gas from blowing out even in this part.

The deposits removed in the dust scraper 44 are sealed inside the sealing mechanism 41 by a double valve structure consisting of a metal seal ball valve 47 and a Teflon seal ball valve 48 arranged below the dust scraper 44. It is formed so that the deposits are discharged to the outside while being secured.

The jacket type ball valve 43 and the Teflon seal type ball valve 45 are such that when the outer cylinder lance 4 is removed, the outer cylinder lance tip 7 passes through the jacket type ball valve 43 and then closes the jacket type ball valve 43. After passing through the Teflon-sealed ball valve 45, the Teflon-sealed ball valve 45 is closed. Conversely, when inserting the outer cylinder lance 4, when the outer cylinder lance tip 7 approaches the Teflon-sealed ball valve 45, the Teflon-sealed ball valve 45 is opened while the jacket-type ball valve 43 remains closed, and then the outer cylinder When the lance tip 7 approaches the jacket type ball valve 43, the jacket type ball valve 43 is opened, the lance tip 7 passes through the jacket type ball valve 43, and the cooling pipe 4 is opened.
2 and is inserted into the blast furnace 2. These operations are
This is done by a limit switch (not shown).

The supply body 37 that supplies energy as a power source to the continuous sample retrieval device 1 is bundled in the form of a cable as a whole, and as shown in FIG. It is formed to hang downward by a weight 38. However, in this case, 5
The depth to which the feeder 138 descends is deep because the supply body 37 is very long. Therefore, as shown in Figure 13,
The centers of the two pulleys 39 are connected by a wire 40, these pulleys are arranged vertically, and the wire 40 is wound around an appropriate shaft so that the pulley 39 maintains its balance and maintains its vertical position. Form. By winding the supply body 37 around these two pulleys 39 in a substantially S-shape, the depth can be approximately half that of the case where the weight 38 is used. In other words, when the supply body 37 is sent out, the upper and lower pulleys 39 approach each other, and when the supply body 39 returns, the pulleys 39
9 are separated from each other in the vertical direction.

The continuous sample extraction device 1 thus formed is operated as follows.

That is, first, the outer cylindrical lance 4 is inserted from the lance tip 7 into the blast furnace 2 through one of the plurality of tuyeres 3 provided around the periphery, and the outer cylindrical lance tip 7 is positioned at any appropriate position within the blast furnace 2. let

At this time, the outer cylinder lance 4 is cooled by flowing cooling water.

This flow of cooling water is sent from the base end 8 side of the outer cylinder lance 4 through the inner surface side of the outer cylinder lance 4 to the tip 7, and then passed through the outer surface side of the external cylinder lance 4 and returned to the base end 8 side. to ensure efficient cooling. In addition, when the outer cylindrical lance 4 is inserted into the blast furnace 2 or removed from the blast furnace, if a load exceeding a predetermined value is applied to the outer cylindrical lance 4, the load detection and stop device 28 stops the insertion and removal of the outer cylindrical lance. This is to prevent accidents by stopping the system.

Next, the inner cylinder lance 5 is passed through the outer cylinder lance 4 into the blast furnace 2.
The molten material in the blast furnace 2 is taken out as a sample by the inner cylinder lance tip bowl 14 attached to the tip, and the inner cylinder lance 5 is slid back to the inner cylinder lance tip bowl 14.
is moved to the sample receiving packet 35 of the sample receiving device 6, and at that position, the inner cylinder lance 5 is rotated at an appropriate angle to pour the melt into the sample receiving packet 35, and the inner cylinder lance 5 is slid back and forth as appropriate. By repeating this process an appropriate number of times, a predetermined amount of the molten material as a sample is stored in the sample receiving packet 35.

In these operations, the closure valve 34 and the like are operated as the inner barrel lance 5 moves. When the outer barrel lance 4 is inserted into the blast furnace 2 and the inner barrel lance 5 is inserted into the blast furnace 2, the closure valve 34 is opened. I'll keep it.

When the inner lance tip bowl 14 attached to the tip of the inner lance 5 reaches the sample receiving packet 35 of the sample receiving device 6, the base end of the inner lance 5 reaches the limit where it is attached to the lance guide rail 16. Press a switch (not shown). As a result, the sealing valve 34 is closed, and the inner cylinder lance 5 is gripped by the chuck 23, rotated 180 degrees by the link mechanism 25, and then reversely rotated to return to its original position.

When the inner cylinder lance 5 returns to its original angular position, the limit switch is released, the blocking valve 34 is opened, and the inner cylinder lance 5 is inserted into the blast furnace 2 again. This is repeated several times in succession, and the molten material in the blast furnace 2 is taken out as a sample and stored in the sample receiving packet 35.

Also, at this time, especially when the inner cylinder lance tip bowl 14 moves to the sample receiving packet 35, the furnace gas in the blast furnace 2 passes through the outer cylinder lance 4 and tries to blow out, but the sample receiving device 6 The pressure inside the blast furnace is made higher than the pressure inside the blast furnace to prevent the gas inside the blast furnace from blowing out. At that time, as described above, the sample receiving device 6 arranges the sealing valve 34 on the side of the outer cylinder lance 4 and the sample receiving packet 35 on the opposite side to ensure a sealed state, and connects the sealing valve 34 and the outer cylinder. A compressed gas inlet 36 is provided between the lance 4 and the compressed gas inlet 36. With this structure, compressed nitrogen gas is fed through the compressed gas inlet 36 to make the pressure higher than the pressure in the blast furnace 2, and the gas in the furnace is ejected. Safety is achieved through a double prevention structure in which the first step is to prevent this, and the second step is to prevent its ejection by increasing the air pressure inside the sample receiving packet 35 itself.

It goes without saying that the structures of the outer cylindrical lance 4, the inner cylindrical lance 5, and the sample receiving device 6 described above are not limited to the embodiments described above. Furthermore, it goes without saying that any structure may be used, whether it is the structure of the load detection/stop device 28 or the structure of the drive device 15, etc., as long as it operates in the same way. It goes without saying that the present invention is not limited to the above-described embodiment even if other structures are used. Furthermore, it goes without saying that the blast furnace is not limited to the blast furnace 2 and may be of any other type.

(Effects of the Invention) The present invention configured as described above provides an in-blast furnace sample continuous extraction device for continuously taking out the molten material in the furnace as a sample from the tuyere 3 during operation of the blast furnace. An outer cylindrical lance 4 that is inserted into the furnace from the tip, an inner cylindrical lance 5 that passes through the outer cylindrical lance 4 into the furnace and takes out the molten material as a sample, and a molten material taken out by the inner cylindrical lance 5. It consists of a sample receiving device 6 that collects a sample up to a predetermined amount, and a sealing mechanism 41 that ensures the sealing of the blast furnace when the outer cylindrical lance 4 is inserted into the blast furnace. A water channel 9 is formed for passing cooling water to the tip, and an inner tube lance tip bowl 14 is attached to the tip 7 of the inner tube lance 5, and this inner tube lance tip bowl 14 is connected from inside the blast furnace to the sample receiving device 6. The outer cylinder lance 4 is formed to be slidable in order to be moved.
A load detection and stop device 28 is arranged to stop the insertion and removal of the outer cylindrical lance 4 when a load larger than a predetermined value is applied when the outer cylindrical lance 4 is inserted into and removed from the blast furnace. By forming the pressure inside the device 6 to be higher than the pressure inside the blast furnace, and forming the inner cylinder lance 5 to continuously slide back and forth by the drive device 15, the pressure in the blast furnace is increased from one of the tuyeres 3 of the blast furnace. The outer cylindrical lance 4 is inserted into the blast furnace from the tip, and the inner cylindrical lance 5 with the inner cylindrical lance tip bowl 14 attached to the tip is passed through the outer cylindrical lance 4 and inserted into the blast furnace from the tip 7. The molten material is taken out as a sample, the inner cylindrical lance 5 is slid back and the inner cylindrical lance tip bowl 14 is moved to the sample receiving device 6, and at that position, the inner cylindrical lance 5 is rotated at an appropriate angle to melt the material into the sample receiving device 6. By opening the object, sliding the inner cylinder lance 5 back and forth as appropriate, and repeating this several times, the molten material as a sample can be stored in the receiving device 6 to a predetermined amount. Therefore, even when the blast furnace is in operation, the outer cylindrical lance 4 is cooled without stopping the operation, so that the molten material in the blast furnace can be continuously taken out as a sample without melting.

At this time, the outer cylinder lance 4 is cooled by flowing cooling water, and the flow of this cooling water is passed from the base end 8 side of the outer cylinder lance 4 to the inner side of the outer cylinder lance 4 to the tip 7 part. sending,
Since it is made to pass through the outer surface side of the outer cylindrical lance 4 and return to the base end 8 side, cooling can be performed efficiently.

In addition, when the outer cylindrical lance 4 is inserted into or removed from the blast furnace, if a load exceeding a predetermined value is applied to the outer cylindrical lance 4, the load detection and stop device 28 stops the insertion and removal of the outer cylindrical lance 4. This prevents accidents and ensures the safety of workers and the blast furnace.

Also, at this time, especially when the inner cylinder lance tip bowl 14 moves to the sample receiving device 6, the furnace gas in the blast furnace passes through the outer cylinder lance 4 and tries to blow out, but the sealing mechanism 41
The pressure inside the sample receiving device 6 is made higher than the pressure inside the blast furnace to prevent the gas inside the furnace from blowing out. At that time, a sealing valve 34 is attached to the sample receiving device 6 on the outer cylindrical lance 4 side.
A sample receiving packet 35 is arranged on the opposite side to ensure a sealed state, and compressed nitrogen gas is fed from the compressed gas inlet 36 provided between the sealing valve 35 and the outer cylinder lance 4 to maintain the pressure inside the blast furnace. It has a double prevention structure in which the air pressure inside the sample receiving packet 35 itself is increased to prevent the blowout of gas in the furnace in the first step, and the blowout is prevented in the second step by increasing the pressure inside the sample receiving packet 35 itself. Safety can be further ensured.

Furthermore, when the inner cylinder lance 5 itself slides, the inner cylinder lance tip bowl 14 is slid while maintaining a predetermined rotation angle to prevent the melt sample from spilling from the inner cylinder lance tip bowl 14 by the guide. Since the guide is configured to be released and rotated at an appropriate angle only when it reaches the position of the sample receiving device 6, the sample of the melt can be reliably transferred to the sample receiving device 6, and reliable sampling is possible. It is.

The inner cylindrical lance 5 is slid by sandwiching the inner cylindrical lance 5 between the peripheral surfaces of an appropriate number of drive rollers 26 and 27, and by rotating these drive rollers 26 and 27, and the inner cylindrical lance 5 itself It is made to slide in a state where it is possible to rotate. As a result, the inner cylindrical lance 5 can both slide and rotate, and is very simple in structure.

Further, since the outer cylindrical lance 4 is moved to be inserted into the blast furnace, samples can be arbitrarily taken out from various locations within the blast furnace by stopping it at an appropriate position.

As described above, according to the present invention, during the operation of the blast furnace, samples of the molten material can be safely and continuously taken out from any arbitrary position from the tuyere to the core, and the samples can be taken out continuously from the blast furnace. It has excellent effects such as being able to easily perform the extremely dangerous task of sampling, which is almost impossible with conventional methods.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention; FIG. 1 is a front view, FIG. 2 is a plan view, FIG. 3 is a front view of a partially cutaway part, and FIG. Figure 5 shows v- in Figure 3.
■An arrow line view, Figure 6 is an enlarged sectional view of the outer cylinder lance, Figure 7 is a schematic diagram showing the rotation mechanism of the inner cylinder lance, Figure 8 is an enlarged front view of the main part showing the guide part, and Figure 9 is an enlarged sectional view of the outer cylinder lance. Similarly, Fig. 10 is a front view of the entire guide, Fig. 11 is a cutaway front view of the main part of the sealing mechanism, Fig. 12 is a plan view, and Fig. 13 is a side sectional view of the main part.
The figure is a front view of the supply body storage structure. 1... Continuous sample extraction device, 2... Blast furnace, 3.
...tuyere, 4...outer cylinder lance, 5...inner cylinder lance,
6... Sample receiving device, 7... Tip, 8... Base end, 9... Channel, 10... Water supply port, 11... Drain port, 12... Receiver, 13... ...Roller 14...
・Inner cylinder lance tip bowl, 15... Drive device, 16...
Lance guide rail, 17... Guide groove, 18...
Bolt, 19... Support, 20... Lance guide rail receiving cart, 21... Guide, 22... Notch, 2
3... Chuck, 24... Operating rod, 25...
Link mechanism, 26... Drive roller 27... Drive roller 27a... Motor 28... Load detection and stop device, 29... Conduit, 30... Sealing ring, 3
DESCRIPTION OF SYMBOLS 1... Guide tube, 32... Detection plate, 33... Detector, 34... Blocking valve, 35... Sample receiving packet, 36... Compressed gas insertion port, 37... Supply Body, 38... Weight, 39... Pulley, 40... Wire, 41... Sealing mechanism, 42... Cooling pipe, 43...
Jacket type ball valve, 44...Dust scraper, 45...Teflon seal type ball valve, 46
...Sealing ring, 47...Metal seal type ball valve, 48...Teflon seal type ball valve, 49.
...Rail foundation, 50...Rail, 51...Bogie,
52...Spring, 53...Mounting rod, 54
...Compressed gas insertion port. Patent applicant Nippon Kokan Co., Ltd. Patent applicant Kurita Kenganki Co., Ltd. Agent

Claims (1)

[Scope of Claims] 1. In a continuous blast furnace sample extraction device that continuously takes out the molten material in the furnace as a sample from the tuyere during operation of the blast furnace, A cylindrical lance, an inner cylindrical lance that passes through the outer cylindrical lance into the furnace and takes out the molten material as a sample, and a sample receiving device that collects a sample of the molten material taken out by the inner cylindrical lance to a predetermined amount; It consists of a sealing mechanism that ensures the sealing of the blast furnace when the outer cylinder lance is inserted into the blast furnace.
The outer cylindrical lance forms a channel in the jacket of this lance that allows cooling water to flow to the tip, and the inner cylindrical lance has an inner cylindrical lance tip bowl attached to its tip, and this inner cylindrical lance tip bowl is inserted into the blast furnace. The outer barrel lance is slidably moved from the furnace to the sample receiving device, and the outer barrel lance is configured to be slidable when a load greater than a predetermined value is applied to the outer barrel lance when inserting or removing the outer barrel lance into the blast furnace. The sealing mechanism and sample receiving device are configured to make the internal pressure higher than the pressure inside the blast furnace, and the inner cylinder lance is continuously slid back and forth by a drive device. A device for continuously taking out samples in a blast furnace, characterized in that the device is formed to continuously take out samples in a blast furnace. 2. The outer cylindrical lance forms a water channel so that the cooling water passes from the base end through the inner surface of the outer cylindrical lance to the tip, passes through the outer surface of the outer cylindrical lance, and returns to the base end again. 2. The apparatus for continuously taking out samples in a blast furnace according to claim 1, which is preferably formed into a multi-tube structure. 3. The sample receiving device has a sealing valve on the outer lance side and a sample receiving bucket on the opposite side to ensure a sealed state, and a compressed gas insertion port is provided between the sealing valve and the outer lance. 3. The apparatus for continuously taking out samples in a blast furnace according to claim 1, wherein the sample receiving bucket itself is also formed to increase the internal pressure. 4. The inner lance is formed so that it can slide while being held by a guide at an angle that prevents the melt sample from spilling from the inner lance tip bowl attached to the tip of the inner lance, and the inner lance tip bowl is attached to the sample receiving device. 4. The apparatus for continuously taking out samples in a blast furnace according to claim 1, wherein the guide is configured to release the guide so as to rotate at an appropriate angle when the apparatus reaches the position. 5. The blast furnace according to claim 1, 2, 3 or 4, wherein the inner cylinder lance is slid by sandwiching the inner cylinder lance between the peripheral surfaces of an appropriate number of driving rollers and rotating these driving rollers. Continuous sample extraction device.