An operating method and system for reducing sticking of the taphole

Abstract

The present invention provides an operation method and system for reducing taphole jamming. The operation method for reducing taphole jamming includes the following steps: S1: Control the drill jumbo to reach the corresponding position of the taphole, and align the drill bit of the drill jumbo with the center of the mud sleeve to initially drill and position the taphole passage; S2: Control the traveling motor to drill the drill bit of the drill jumbo towards the hearth direction, and at the same time control the high-pressure inert gas to purge the taphole passage; S3: Monitor the drilling depth and drilling speed of the drill bit of the drill jumbo, and the amount of broken taphole gun mud chips blown out from the taphole passage. By controlling the drilling of the drill bit and regulating the atomized water, the present invention reduces the probability of taphole jamming, reduces the taphole opening time, ensures the effective iron discharge time of the taphole, improves the on-time rate and one-shot drilling rate of the taphole, reduces the number of times of blowing oxygen at the taphole, reduces the labor intensity of workers, facilitates the timely discharge of slag and iron, and creates conditions for the long-term stable and smooth operation of the blast furnace.

Description

Technical Field

[0001] The present invention relates to the technical field of taphole drills, and particularly to an operation method and system for reducing taphole jamming. Background Art

[0002] When the existing taphole drill drills the taphole, first start the rotation and vibration of the taphole drill, jog in 50 mm, and open the manual valve of nitrogen purging; when the drilling depth > 500 mm, turn on the atomized water to cool the drill bit; after the taphole is successfully drilled through, withdraw the taphole drill from the taphole passage and return to the standby position, and turn off the atomized water and nitrogen purging of the taphole drill. After the slag and iron are discharged, ram the taphole with gunite for plugging.

[0003] During the process of the taphole drill drilling into the gunite, the gunite is at different depths in the taphole passage, and its temperature is also different. The deeper the depth, the higher the temperature. As the drilling depth of the taphole drill bit increases, the flexural strength of the gunite decreases, and the high-temperature creep increases. The crushed gunite chips blown out from the taphole passage change from fine powder to granular. Moreover, when the drilling depth exceeds 2800 mm, the temperature of the taphole passage exceeds 1000 °C. The atomized water used to cool the drill bit immediately vaporizes into steam under the action of high temperature, combines with the crushed gunite particles to form large chunks of slag, and accumulates in the taphole passage; or after the taphole is drilled through, the slag and iron are immediately cooled by the steam and change from liquid to solid, wrapping around the drill bit and drill pipe, making it impossible to smoothly withdraw the drill pipe, resulting in taphole jamming, forcing oxygen burning, increasing labor intensity and prolonging the taphole opening time, reducing the on-time rate of the taphole and the one-time drilling rate, and further affecting the slag and iron discharge and the stable operation of the blast furnace. Summary of the Invention

[0004] In view of the above-mentioned disadvantages of the prior art, the purpose of the present invention is to provide an operation method and system for reducing taphole jamming, which is used to solve the problem in the prior art that the atomized water used to cool the drill bit vaporizes into steam under high temperature, combines with the crushed gunite particles to form large chunks of slag, accumulates in the taphole passage, or after the taphole is drilled through, the slag and iron are immediately cooled by the steam and change from liquid to solid, wrapping around the drill bit and drill pipe, making it impossible to smoothly withdraw the drill pipe, resulting in taphole jamming, forcing oxygen burning, increasing labor intensity and prolonging the taphole opening time, reducing the on-time rate of the taphole and the one-time drilling rate, and affecting the slag and iron discharge and the stable operation of the blast furnace.

[0005] To achieve the above purpose and other related purposes, the present invention provides an operation method for reducing taphole jamming, including the following steps:

[0006] S1: Control the taphole drill to reach the corresponding position of the taphole, and align the taphole drill bit with the center of the mud sleeve to initially drill and position the taphole passage;

[0007] S2: Control the taphole drill bit to drill into the hearth direction, and at the same time control the high-pressure inert gas to purge the taphole passage;

[0008] S3: Monitor the drilling depth and drilling speed of the drill bit of the taphole drill, as well as the amount of crushed gunite chips blown out from the taphole passage. When it is monitored that the drill bit of the taphole drill reaches the preset depth, control the opening of the atomized water switch to make the atomized water interact with the high-pressure inert gas to form a highly atomized state and spray and purge from the front end of the drill bit;

[0009] S4: Judge whether the condition of the crushed gunite chips blown out from the taphole passage meets the preset requirements. If not, control the retraction of the taphole drill to blow out the crushed gunite chips in the taphole passage. If so, continue to drill;

[0010] S5: Monitor whether the drilling condition in the taphole passage meets the requirement of stopping the supply of atomized water. If so, control the closing of the atomized water. If not, control the continuous supply of atomized water;

[0011] S6: When it is monitored that the drilling speed of the drill bit of the taphole drill becomes an accelerating state, control the taphole drill to make the taphole drill quickly leave the taphole with the drill bit.

[0012] In an embodiment of the present invention, the S1 further includes: controlling the taphole drill to only turn on the rotation function, and using the initial thrust of the taphole drill pressing against the surface of the mud sleeve at the taphole to initially drill and position the taphole passage with the drill bit.

[0013] In an embodiment of the present invention, in the S2, while controlling the drill bit of the taphole drill to drill into the hearth direction, control to start the vibration treatment of the initially drilled and positioned taphole passage by the drill bit of the taphole drill.

[0014] In an embodiment of the present invention, in the S2, the drilling speed of the drill bit of the taphole drill is 3.5 m / min, the injection pressure of the high-pressure inert gas ≥ 1.0 Mpa, and the flow rate of the inert gas is 10 m 3 / min.

[0015] In an embodiment of the present invention, the high-pressure inert gas in the S2 is a nitrogen by-product produced by an oxygen generator.

[0016] In an embodiment of the present invention, in the S3, the spraying pressure of the controlled atomized water is 0.8 - 1.0 Mpa, and the water output is 0 - 10 L / min.

[0017] In an embodiment of the present invention, in S4, determining whether the condition of the drilled gun mud chips blown out from the taphole channel meets a preset requirement includes: collecting the amount of the drilled gun mud chips discharged from the taphole, calculating the difference data △N between the blown amount of the drilled gun mud chips and the normal amount, and determining whether the difference data △N exceeds the threshold Nmax of the amount of the drilled gun mud chips; and simultaneously monitoring the color information of the drilled gun mud chips and determining whether the color information of the drilled gun mud chips is red.

[0018] In an embodiment of the present invention, in S4, controlling the withdrawal of the taphole opener includes: controlling the taphole opener to enter the reverse mode, making the taphole opener retreat a predetermined distance and then stop for a predetermined time, and controlling the drill bit of the taphole opener to blow the high-pressure inert gas into the taphole channel.

[0019] In an embodiment of the present invention, in S5, it further includes: monitoring whether red drilled gun mud chips are blown out from the taphole channel before the drilling depth of the drill bit of the taphole opener reaches the maximum depth Hmax corresponding to the closing of the atomized water. If so, control to close the atomized water. If not, continue to drill until the drilling depth of the drill bit of the taphole opener reaches the maximum depth Hmax, and then control to close the atomized water.

[0020] In an embodiment of the present invention, S6 further includes: collecting a monitoring start signal within a preset monitoring depth △T range before the drilling depth of the drill bit of the taphole opener reaches the maximum taphole depth Tmax for drilling through the taphole, so as to control the monitoring of the drilling speed of the drill bit of the taphole opener to change to an accelerating state.

[0021] In an embodiment of the present invention, after S6, it further includes: monitoring the outflow condition of the slag and iron from the taphole channel, controlling the drill bit of the taphole opener to leave the mud sleeve area of the taphole, the taphole opener trolley to retreat from the taphole and return to the standby position, and controlling to close the high-pressure inert gas to complete the opening of the taphole.

[0022] The present invention also provides an operating system for reducing taphole sticking, including:

[0023] An initial drilling positioning module, which controls the taphole opener to reach the corresponding position of the taphole, aligns the drill bit of the taphole opener with the center of the mud sleeve to perform initial drilling positioning on the taphole channel;

[0024] A taphole cleaning control module, which controls the taphole opener to drill into the hearth direction with the drill bit, and simultaneously controls the high-pressure inert gas to purge the taphole channel;

[0025] The drill bit monitoring module monitors the drilling depth and drilling speed of the drill bit. When it is detected that the drilling speed becomes an accelerating state, it controls the taphole opener to quickly move the drill bit away from the taphole;

[0026] The atomizing spray control module is connected to the drill bit monitoring module. When it receives that the drilling depth of the drill bit reaches a preset depth, it controls the opening of atomized water so that the atomized water interacts with the high-pressure inert gas to form a highly atomized state and is ejected from the front end of the drill bit for purging;

[0027] The monitoring module for crushed gun mud chips monitors whether the amount of crushed gun mud chips blown out from the taphole channel meets the preset requirements. If not, it controls the taphole opener to retract to blow out the crushed gun mud chips in the taphole channel. If it meets the requirements, it continues to drill; and

[0028] The cooling control module determines whether the drilling condition in the taphole channel meets the requirement of stopping the supply of atomized water. If it meets the requirement, it controls the closing of the atomized water. If it does not meet the requirement, it controls the continuous supply of atomized water.

[0029] As described above, an operation method and system for reducing sticking of the taphole of the present invention have the following beneficial effects: By controlling the opening of the atomized water switch at a predetermined depth, the discharge time of the atomized water can be reasonably set according to the taphole depth, and the spraying amount of the atomized water in the taphole passage can be reasonably controlled. The high-pressure atomized state formed by the combined action of the atomized water and the inert gas can play a good cooling role on the drill bit and drill pipe continuously drilling into the taphole passage. At the same time, the atomized water blown out can reduce the usage amount of the atomized water per unit time when combined with the inert gas, thereby avoiding the formation of large slag by the combination of the crushed gunite chips due to a large amount of atomized water in the taphole passage. During the continuous drilling of the drill bit of the taphole opener, by detecting the blowing amount of the crushed gunite chips, that is, detecting whether the amount of the crushed gunite chips is lower than the normal amount, and when it is detected that the amount of the crushed gunite chips is lower than the normal amount, the drill bit is controlled to retreat in the taphole passage in time and wait for a certain time, so that the inert gas blown from the front end of the drill bit can blow out the accumulated crushed gunite chips in the taphole passage and then continue to drill. By monitoring the red crushed gunite chips in the taphole passage before drilling to a predetermined depth, it is convenient to control the timely closing of the atomized water and the usage amount of the atomized water. By detecting that the drilling speed of the drill bit becomes an accelerating state before the taphole passage is about to be drilled through, it is convenient to accurately know whether the taphole passage has been drilled through, and then control the taphole opener and the drill bit to quickly withdraw from the taphole passage. Through the above control of the drill bit drilling and the regulation of the atomized water, while reducing the probability of taphole sticking, the taphole opening time is also reduced, the effective iron discharge time of the taphole is ensured, the on-time rate of the taphole and the one-shot drilling rate are improved, the number of times of burning oxygen at the taphole is reduced, the labor intensity of workers is reduced, it is beneficial to the timely discharge of slag and iron, and conditions are created for the long-term stable operation of the blast furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a flowchart of the operation method of the present invention.

[0031] Figure 2 It shows a schematic diagram of a specific embodiment of the operation method of the present invention;

[0032] Figure 3 It is an architecture diagram of the operation system of the present invention. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0033] The following describes the embodiments of the present invention through specific examples. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other. It should also be understood that the terms used in the embodiments of the present invention are for describing specific implementation manners and are not intended to limit the protection scope of the present invention. The test methods without specific conditions noted in the following embodiments are usually carried out under conventional conditions or according to the conditions recommended by each manufacturer.

[0034] Please refer to Figures 1 to 3 . It should be noted that the structures, ratios, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions under which the present invention can be implemented. Therefore, they do not have technical substantial significance. Any modification of the structure, change of the proportional relationship, or adjustment of the size, without affecting the effects that the present invention can produce and the purposes that can be achieved, should still fall within the scope covered by the technical content disclosed in the present invention. At the same time, the terms such as "upper", "lower", "left", "right", "middle", and "one" cited in this specification are only for the convenience of clear narration and are not used to limit the scope under which the present invention can be implemented. The change or adjustment of their relative relationships, without substantial change in the technical content, should also be regarded as the scope under which the present invention can be implemented.

[0035] Please refer to Figure 1 . The present invention provides an operation method for reducing the sticking of the taphole, including the following steps:

[0036] S1: Control the drill rig of the taphole opener to reach the corresponding position of the taphole, and align the drill bit of the taphole opener with the center of the mud sleeve to initially drill and position the taphole passage;

[0037] S2: Control the drill bit of the taphole opener to drill towards the hearth direction, and at the same time control the high-pressure inert gas to purge the taphole passage;

[0038] S3: Monitor the drilling depth and drilling speed of the drill bit of the taphole opener, as well as the amount of crushed gun mud chips blown out from the taphole passage. When it is monitored that the drill bit of the taphole opener reaches the preset depth, control the opening of the atomized water switch to make the atomized water interact with the high-pressure inert gas to form a highly atomized state and spray and purge from the front end of the drill bit;

[0039] S4: Judge whether the condition of the crushed gun mud chips blown out from the taphole passage meets the preset requirements. If not, control the drill rig of the taphole opener to retreat to blow out the crushed gun mud chips in the taphole passage. If it meets the requirements, continue to drill;

[0040] S5: Monitor whether the drilling condition in the taphole passage meets the requirement for stopping the supply of atomized water. If it meets the requirement, control to close the atomized water. If it does not meet the requirement, control to continue supplying the atomized water.

[0041] S6: When it is monitored that the drilling speed of the drill bit of the taphole opener becomes in an accelerating state, control the taphole opener to quickly move away from the taphole with the drill bit.

[0042] In an embodiment of the present invention, during the process of the taphole opener opening the taphole with the drill bit, first make the taphole opener reach the taphole position, and make the drill bit of the taphole opener align with the center of the taphole mud sleeve. Through the inertial force of the drill bit, the drill bit is drilled into the mud sleeve to a predetermined depth, thereby realizing the initial drilling and positioning of the taphole passage. After the taphole passage is initially drilled and positioned, control the traveling motor to drive the taphole opener to move, so that the drill bit of the taphole opener can continue to drill along the taphole passage towards the hearth direction. And during the continuous drilling, control to blow out high-pressure inert gas at the front end of the drill bit to realize the cleaning treatment of the crushed gun mud chips in the continuously drilled taphole passage. During the process of the drill bit of the taphole opener drilling, detect the drilling depth, drilling speed and the amount of crushed gun mud chips drilled out of the drill bit of the taphole opener. When drilling to a predetermined depth, turn on the atomized water. By mixing and spraying the atomized water and high-pressure inert gas at the same time, it can realize the cooling of the drill bit of the taphole opener in the taphole passage, and at the same time, it can timely clean the drilled crushed gun mud chips. Moreover, by mixing and atomizing the atomized water and high-pressure inert gas and then spraying them out, the usage amount of the atomized water can be reduced, thereby saving the water usage amount, reducing the formation of large slag by the combination of the atomized water and the crushed gun mud chips, and further causing the accumulation of the taphole passage or wrapping on the drill bit and drill pipe, resulting in taphole sticking. During the continuous drilling of the drill bit of the taphole opener, by judging whether the amount of crushed gun mud chips blown out of the taphole passage by the high-pressure inert gas meets the preset requirement, it can be realized that when the amount of crushed gun mud chips does not meet the preset requirement, it indicates that there are crushed gun mud chips in the taphole passage. By controlling the taphole opener to retreat a certain distance with the drill bit, the high-pressure inert gas blown out from the front end of the drill bit of the taphole opener can clean the taphole passage, thereby ensuring that there is no accumulation of crushed gun mud chips in the taphole passage and no jamming of the drill pipe. During the continuous drilling of the drill bit of the taphole opener, by detecting whether the drilling depth of the drill bit meets the requirement for stopping the supply of atomized water, it can be realized that when it meets the requirement, the atomized water can be timely closed, thereby reducing the usage amount of the atomized water. When the drill bit of the taphole opener is about to drill through the taphole passage, monitor the drilling speed of the drill bit of the taphole opener. When it is monitored that the drill bit becomes in an accelerating state, it indicates that the taphole passage has been drilled through, and control the traveling motor to drive the taphole opener and the drill bit to withdraw from the taphole passage.

[0043] Step S1 further includes: controlling the taphole opener to only turn on the rotation function, and using the initial thrust of the taphole opener pressing against the surface of the taphole mud sleeve to initially drill and position the taphole passage with the drill bit.

[0044] In an embodiment of the present invention, when the drill bit of the taphole machine presses against the surface of the mud sleeve, the drill bit of the taphole machine rotates, and then with the initial thrust force pressing against the mud sleeve, the drill bit is drilled into the surface of the mud sleeve to form an iron notch hole for initial drilling positioning.

[0045] In step S2, while controlling the drill bit of the taphole machine to drill towards the hearth direction, control is started to vibrate and strike the iron notch hole for initial drilling positioning by the drill bit of the taphole machine.

[0046] In step S2, the drilling speed of the drill bit of the taphole machine is 3.5 m / min, the injection pressure of the high-pressure inert gas ≥ 1.0 Mpa, and the flow rate of the pressure inert gas is 10 m 3 / min.

[0047] The high-pressure inert gas in S2 is the nitrogen by-product manufactured by the oxygen generator. Thus, while providing oxygen for the hearth through the oxygen generator, the by-product nitrogen of the manufactured oxygen is further utilized, thereby reducing the manufacturing cost of the high-pressure inert gas.

[0048] In step S3, control the ejection pressure of the atomized water to be 0.8 - 1.0 Mpa, and the water output is 0 - 10 L / min.

[0049] In step S4, determine whether the condition of the drilled and broken gun mud chips blown out from the iron notch hole meets the preset requirements, including: collecting the amount of the drilled and broken gun mud chips discharged from the iron notch, calculating the difference data △N between the blown-out amount of the drilled and broken gun mud chips and the normal amount, and determining whether the difference data △N exceeds the threshold Nmax of the amount of the drilled and broken gun mud chips; and simultaneously monitoring the color information of the drilled and broken gun mud chips, and determining whether the color information of the drilled and broken gun mud chips is red.

[0050] In an embodiment of the present invention, when judging the amount of the drilled and broken gun mud chips blown out from the iron notch hole, by collecting the amount of the drilled and broken gun mud chips blown out from the iron notch and calculating the difference data △N between the amount and the normal amount of the drilled and broken gun mud chips under normal conditions, it is thus determined whether there is a situation of accumulation of the drilled and broken gun mud chips blown out from the iron notch hole according to whether the difference data △N exceeds the threshold Nmax of the amount of the drilled and broken gun mud chips, so as to timely control the taphole machine and the drill bit to temporarily withdraw, and blow out from the front end of the drill bit by the high-pressure inert gas to realize the cleaning of the iron notch hole.

[0051] In step S4, controlling the retraction of the taphole machine includes: controlling the taphole machine to switch to the reverse mode, retracting the taphole machine by a predetermined distance and then stopping for a predetermined time, and controlling the drill bit of the taphole machine to blow out high-pressure inert gas into the iron notch hole.

[0052] In an embodiment of the present invention, when the taphole drill is retracted, by controlling the taphole drill to enter the reverse mode, the traveling motor drives the taphole drill and the drill bit to retract a specified distance, and then stops for a predetermined time. During this period, the taphole drill bit is controlled to blow out high-pressure inert gas to purge the taphole passage.

[0053] In step S5, it further includes: monitoring whether red crushed gun clay chips are blown out in the taphole passage before the drilling depth of the taphole drill bit reaches the maximum depth Hmax corresponding to the closing of the atomized water. If so, control to close the atomized water. If not, continue drilling until the drilling depth of the taphole drill bit reaches the maximum depth Hmax, and then control to close the atomized water.

[0054] In an embodiment of the present invention, when the drilling depth reaches the point where red crushed gun clay chips are blown out in the taphole passage, it indicates that the drilling depth is about to reach the maximum taphole depth Tmax. At this time, the red crushed gun clay chips drilled out are in a red-hot state. That is, when the atomized water is closed at this time, there is still some remaining atomized water sprayed between the tail of the taphole drill and the drill bit, which serves to continuously cool the drill bit and the drill pipe.

[0055] Step S6 further includes: collecting the monitoring start signal within the preset monitoring depth range △T before the drilling depth of the taphole drill bit reaches the maximum taphole depth Tmax for drilling through the taphole, so as to control the monitoring of the drilling speed of the taphole drill bit to change to an accelerated state.

[0056] In an embodiment of the present invention, since the drill bit cannot contact the flowing slag and iron, if it is not retracted in time, the slag and iron will wrap around the drill bit and the drill pipe, causing the drill bit and the drill pipe to get stuck in the taphole passage. Therefore, when monitoring the drilling speed of the taphole drill bit, by setting a possible detection depth range for drilling through, that is, the preset monitoring depth range △T, before reaching the maximum taphole depth Tmax, and when approaching the starting point of this preset monitoring depth range △T, control to start monitoring the change of the drilling speed to an accelerated state, so as to ensure that when the drilling speed of the drill bit accelerates, the drill bit and the taphole drill can be timely controlled to withdraw from the taphole passage.

[0057] After step S6, it further includes: monitoring the outflow condition of the slag and iron from the taphole passage, controlling the taphole drill bit to leave the mud sleeve area of the taphole, the taphole trolley to retreat from the taphole and return to the standby position, and controlling to close the high-pressure inert gas to complete the opening of the taphole.

[0058] In an embodiment of the present invention, before controlling the taphole drill and the drill bit to withdraw from the taphole passage, by monitoring the outflow of the iron slag from the taphole, and when the iron slag flows out from the taphole passage, controlling the drill bit to leave the mud sleeve area, the taphole trolley to retreat, and the taphole drill to return to the standby position, closing the continuous spraying of the high-pressure inert gas, and at the same time keeping the whole taphole opening time within 3 - 5 minutes.

[0059] Please refer toFigure 2 In the given embodiment, the taphole drill is rotated to the taphole position by operating the remote controller, and the drill bit of the taphole drill is aligned with the center of the mud sleeve and pressed against the center of the mud sleeve. The rotation function of the taphole drill is controlled to be turned on, so that the drill bit enters the taphole channel slightly (i.e., 50 mm ±) under the pushing force when pressed. This position is the initial drilling positioning of the mud sleeve. After drilling 50 mm ±, the vibration function of the taphole drill is controlled to be turned on. By controlling the walking motor of the taphole drill to enter the forward mode, it drills to a depth of 100 mm at a speed of 3.5 m / min. Subsequently, after drilling 100 mm, the high-pressure nitrogen is blown to purge the continuously drilled taphole channel, and the pressure of the high-pressure nitrogen is controlled to be ≥ 1.0 Mpa, and the nitrogen flow rate is controlled at 10 m 3 / min. After the drilling depth reaches 1500 mm, control the opening of the atomized water, control the atomized water pressure at 0.8 - 1.0 MPa, the water output at 0 - 10 L / min. The atomized water pipe and the nitrogen pipe are both seamless stainless steel pipes with an inner diameter of Φ15 mm. The two pipes converge in a shape such as a T (that is, the pipes corresponding to the two upper ends of the "T" are respectively connected to the atomized water and high-pressure nitrogen, and the pipe corresponding to the lower end outputs the mixture of highly atomized atomized water and high-pressure nitrogen after convergence), and are connected to the inner diameter of the taphole machine connecting sleeve. Then, through the threaded connection between the drill pipe and the connecting sleeve, the drill pipe and the drill bit are also threadedly connected, and 2 - 5 small holes with a diameter of Φ5 - 7 mm are opened on the drill bit. Thus, the highly atomized mixture formed by the interaction of nitrogen and water flows through the inner diameter (Φ15 mm) channel of the drill pipe into the front end of the drill bit and is ejected from the drill bit to protect the taphole machine drill bit, drill pipe, and blow out the gun mud chips. After the drill bit continues to drill to 2000 mm, control the traveling motor to make the taphole machine enter a one-time backward mode first. That is, retreat the taphole machine trolley 300 mm at a time, then stop the traveling motor for 10 - 30 s, control the taphole machine drill bit to blow out the crushed gun mud chips in the taphole channel in time, observe that there is no obvious slag removed from the taphole channel, then turn on the traveling motor and continue to drill inward. During the continuous drilling process after 2000 mm, monitor the amount of crushed gun mud chips blown out from the taphole channel. If it is much lower than the normal amount, promptly control the traveling motor to make the taphole machine trolley and the drill bit retreat and clean the crushed gun mud chips in time to ensure that there is no accumulation of crushed gun mud chips in the taphole channel and the drill pipe has no jamming phenomenon. Before continuing to drill to a depth of 2800 mm, if red slag (i.e., red crushed gun mud chips) appears, immediately close the atomized water valve (after the atomized water is closed, there is still some remaining water between the tail of the taphole machine and the drill bit, which can cool the drill bit and drill pipe). When no red crushed gun mud chips appear before the drilling depth reaches 2800 mm, then at the depth of 2800 mm, control to close the atomized water valve. Detect the drilling speed of the taphole machine drill bit before the drill bit is about to reach the maximum taphole depth Tmax. If the drilling speed of the drill bit suddenly enters an accelerating state, it means that the taphole channel has been drilled through and there is no gun mud blocking ahead. Therefore, immediately stop continuing to drill, immediately change the traveling motor to the "backward" mode, and quickly withdraw the taphole machine trolley from the taphole channel at a speed of 7.0 m / min (the drill bit cannot contact the flowing slag and iron. If the withdrawal is not timely, the slag and iron will wrap around the drill bit and drill pipe, causing the drill bit and drill pipe to get stuck in the taphole channel). Finally, the slag and iron flow out from the taphole channel, the drill bit leaves the taphole mud sleeve area, the taphole machine trolley retreats in place, then retreat the taphole machine to the standby position, close the high-pressure nitrogen manual valve, the taphole is normally opened, and the entire taphole opening time is controlled within 3 - 5 min.

[0060] As Figure 3 shown, the present invention also provides an operating system for reducing drill jamming at the taphole, including:

[0061] Initial drilling positioning module. The initial drilling positioning module controls the taphole machine to reach the corresponding position at the taphole, aligns the drill bit of the taphole machine with the center of the mud sleeve to conduct initial drilling positioning on the taphole passage;

[0062] Taphole cleaning control module. The taphole cleaning module controls the taphole machine to drill towards the hearth direction with the drill bit, and at the same time controls the high-pressure inert gas to purge the taphole passage;

[0063] Drill bit monitoring module. The drill bit monitoring module monitors the drilling depth and drilling speed of the drill bit. When it monitors that the drilling speed becomes an accelerating state, it controls the taphole machine to quickly leave the taphole with the drill bit;

[0064] Atomization spraying control module. The atomization spraying control module is connected to the drill bit monitoring module. When it receives that the drilling depth of the drill bit reaches the preset depth, it controls the opening of the atomized water, so that the atomized water interacts with the high-pressure inert gas to form a highly atomized state and is ejected from the front end of the drill bit for purging;

[0065] Drilled gun mud chips monitoring module. The drilled gun mud chips monitoring module monitors whether the amount of drilled gun mud chips blown out from the taphole passage meets the preset requirements. If not, it controls the taphole machine to retreat to blow out the drilled gun mud chips in the taphole passage. If it meets the requirements, it continues to drill; and

[0066] Cooling control module. The cooling control module judges whether the drilling condition in the taphole passage meets the requirement of stopping the supply of atomized water. If it meets the requirement, it controls the closing of the atomized water. If it does not meet the requirement, it controls the continuous supply of atomized water.

[0067] In an embodiment of the present invention, through the initial drilling positioning module, before the walking motor controls the taphole machine and the drill bit to drill into the taphole passage, the pre-pressure when the drill bit of the taphole machine presses against the surface of the mud sleeve is utilized. Then, when the drill bit rotates, the initial positioned taphole passage is initially drilled. The taphole cleaning control module ejects high-pressure inert gas from the front end of the drill bit during drilling to realize the cleaning of the drilled gun mud chips. Through the atomization spraying control module, the opening of the atomized water is controlled when the drilling depth reaches a predetermined depth, so as to realize the combined action with the high-pressure inert gas, which not only cools the drill pipe and the drill bit, but also saves the consumption of atomized water and solves the accumulation of drilled gun mud chips. And through the drilled gun mud chips monitoring module, it monitors whether the amount of drilled gun mud chips blown out is normal. Then, when it is not normal, it controls the drill bit to retreat in the taphole passage and blows out the drilled gun mud chips in the taphole passage to solve the problem of drill sticking as the drilling depth increases. Through the cooling control module, the drilling condition of the drill bit is monitored, and then it is judged whether the drilling condition can stop the supply of atomized water. When it can stop, it controls the continuous supply of atomized water, so as to realize the saving of atomized water and further solve the problem that the drilled gun mud chips combine into large slag blocks due to excessive use of atomized water, and then the accumulation of the taphole passage or the problem of taphole sticking.

[0068] In summary, the present invention controls the opening of the atomized water switch at a predetermined depth, so as to realize the reasonable setting of the discharge time of the atomized water according to the taphole depth, and further reasonably control the spraying amount of the atomized water in the taphole passage. The high-pressure atomized state formed by the combined action of the atomized water and the inert gas can play a good cooling role on the drill bit and drill pipe continuously drilling into the taphole passage. At the same time, the atomized water blown out, combined with the inert gas, can reduce the usage amount of the atomized water per unit time, thereby avoiding the formation of large slag blocks due to the relatively large amount of atomized water in the taphole passage. During the continuous drilling of the drill bit of the taphole opener, by detecting the blown-out amount of the crushed gunite chips, that is, detecting whether the amount of the crushed gunite chips is lower than the normal amount, and when it is detected that the amount of the crushed gunite chips is lower than the normal amount, the drill bit is controlled to retreat in the taphole passage in time and wait for a certain time, so that the inert gas blown by the front end of the drill bit can blow out the accumulated crushed gunite chips in the taphole passage and then continue to drill. By monitoring the red crushed gunite chips in the taphole passage before drilling to a predetermined depth, it is convenient to control the timely closing of the atomized water and the usage amount of the atomized water. By detecting that the drilling speed of the drill bit becomes an accelerating state before the taphole passage is about to be drilled through, it is convenient to accurately know whether the taphole passage has been drilled through, and then control the taphole opener and the drill bit to quickly withdraw from the taphole passage. Through the above control of the drill bit drilling and the regulation of the atomized water, while reducing the probability of drill sticking at the taphole, it also reduces the taphole opening time, ensures the effective iron discharge time of the taphole, improves the taphole on-time rate and the one-shot drilling rate, reduces the number of times of burning oxygen at the taphole, reduces the labor intensity of workers, is conducive to the timely discharge of slag and iron, and creates conditions for the long-term stable operation of the blast furnace. Therefore, the present invention effectively overcomes various disadvantages in the prior art and has high industrial utilization value.

[0069] The above embodiments are only illustrative of the principles and effects of the present invention, and are not used to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims

1. An operating method for reducing sticking of the taphole, characterized in that, It includes the following steps: S1: Control the taphole drill to reach the corresponding position of the taphole, and align the drill bit of the taphole drill with the center of the mud sleeve to initially drill and position the taphole passage; S2: Control the drill bit of the taphole drill to drill towards the hearth direction, and at the same time control the high-pressure inert gas to purge the taphole passage; S3: Monitor the drilling depth and drilling speed of the drill bit of the taphole drill, as well as the amount of crushed gun mud chips blown out from the taphole passage. When it is monitored that the drill bit of the taphole drill reaches the preset depth, control to turn on the atomized water switch, so that the atomized water interacts with the high-pressure inert gas to form a highly atomized state and is ejected from the front end of the drill bit for purging; S4: Judge whether the condition of the crushed gun mud chips blown out from the taphole passage meets the preset requirements. If not, control to retract the taphole drill to blow out the crushed gun mud chips in the taphole passage. If it meets the requirements, continue to drill; S5: Monitor whether the drilling condition in the taphole passage meets the requirement of stopping the supply of atomized water. If it meets the requirement, control to turn off the atomized water. If it does not meet the requirement, control to continue to supply atomized water; S6: When it is monitored that the drilling speed of the drill bit of the taphole drill becomes an accelerating state, control the taphole drill to quickly leave the taphole with the drill bit of the taphole drill; Among them, in the S1, it also includes: controlling the taphole drill to only turn on the rotation function, and using the initial thrust of the taphole drill pressing against the surface of the mud sleeve at the taphole to initially drill and position the taphole passage with the drill bit.

2. The operation method for reducing taphole sticking according to claim 1, characterized in that: In the S2, while controlling the drill bit of the taphole drill to drill towards the hearth direction, control to start the vibration treatment of the initially drilled and positioned taphole passage by the drill bit of the taphole drill.

3. The operation method for reducing the sticking of the taphole according to claim 1, characterized in that: In the S2, the drilling speed of the drill bit of the taphole drill is 3.5 m / min, the injection pressure of the high-pressure inert gas ≥ 1.0 MPa, and the flow rate of the pressure inert gas is 10 m³ / min.

4. The operation method for reducing the sticking of the taphole according to claim 1 or 3, characterized in that: In the S2, the high-pressure inert gas is the nitrogen by-product manufactured by the oxygen generator.

5. The operation method for reducing the sticking of the taphole according to claim 1, characterized in that: In the S3, the ejection pressure of the controlled atomized water is 0.8 - 1.0 MPa, and the water output is 0 - 10 L / min.

6. The operation method for reducing taphole sticking according to claim 1, characterized in that: In the S4, judging whether the condition of the crushed gun mud chips blown out from the taphole passage meets the preset requirements includes: collecting the amount of the crushed gun mud chips discharged from the taphole of the crushed gun mud chips, calculating the difference data △N between the blown-out amount of the crushed gun mud chips and the normal amount, and judging whether the difference data △N exceeds the threshold Nmax of the amount of the crushed gun mud chips; and at the same time monitoring the color information of the crushed gun mud chips and judging whether the color information of the crushed gun mud chips is red.

7. The operation method for reducing the sticking of the taphole according to claim 1, characterized in that: In the S4, controlling the retraction of the taphole drill includes: controlling the taphole drill to switch to the reverse mode, so that the taphole drill retracts a predetermined distance and then stops for a predetermined time, and controlling the drill bit of the taphole drill to blow out the high-pressure inert gas to the taphole passage.

8. The operation method for reducing the sticking of the taphole according to claim 1, characterized in that: In S5, it further includes: before the drilling depth of the drill bit of the taphole opener reaches the maximum depth Hmax corresponding to the closing of the atomized water, monitoring whether red crushed gunite chips are blown out from the taphole passage. If so, controlling the closing of the atomized water; if not, continuing to drill until the drilling depth of the drill bit of the taphole opener reaches the maximum depth Hmax, and then controlling the closing of the atomized water.

9. The operation method for reducing the sticking of the taphole according to claim 1, characterized in that: S6 further includes: collecting a monitoring start signal within a preset monitoring depth range ΔT before the drilling depth of the drill bit of the taphole opener reaches the maximum taphole depth Tmax for drilling through the taphole, so as to control the monitoring of the drilling speed of the drill bit of the taphole opener to change to an accelerating state.

10. The operation method for reducing the sticking of the taphole according to claim 1, characterized in that: After S6, it further includes: monitoring the outflow condition of slag and iron from the taphole passage, controlling the drill bit of the taphole opener to leave the mud sleeve area of the taphole, the taphole trolley to retreat from the taphole and return to the standby position, and controlling the closing of the high-pressure inert gas to complete the opening of the taphole.

11. An operating system for reducing sticking of the taphole, characterized in that, It includes: An initial drilling positioning module, which controls the taphole opener to reach the corresponding position of the taphole, aligns the drill bit of the taphole opener with the center of the mud sleeve to perform initial drilling positioning on the taphole passage; A taphole cleaning control module, which controls the taphole opener to drill into the furnace hearth direction with the drill bit, and at the same time controls the high-pressure inert gas to purge the taphole passage; A drill bit monitoring module, which monitors the drilling depth and drilling speed of the drill bit. When it is monitored that the drilling speed changes to an accelerating state, it controls the taphole opener to quickly leave the taphole with the drill bit; An atomizing spraying control module, which is connected to the drill bit monitoring module. When receiving that the drilling depth of the drill bit reaches the preset depth, it controls the opening of the atomized water, so that the atomized water interacts with the high-pressure inert gas to form a highly atomized state and is sprayed out from the front end of the drill bit for purging; A crushed gunite chip monitoring module, which monitors whether the amount of crushed gunite chips blown out from the taphole passage meets the preset requirements. If not, it controls the retraction of the taphole opener to blow out the crushed gunite chips in the taphole passage. If so, it continues to drill; And A cooling control module, which judges whether the drilling condition in the taphole passage meets the requirement of stopping the supply of atomized water. If so, it controls the closing of the atomized water. If not, it controls the continuous supply of atomized water.

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