Furnace front ditch and hole repairing structure of blast furnace

Abstract

The utility model discloses a blast furnace stokehole groove and hole repairing structure which comprises a molten iron main groove, a residual iron hole is horizontally formed in the side wall of one side of the molten iron main groove, the residual iron hole is in a circular truncated cone shape, the hole diameter of the first end of the residual iron hole is larger than that of the second end of the residual iron hole, and the first end of a through hole is located on the end side, close to the molten iron main groove, of the residual iron hole. A cylindrical sleeper penetrates through the sintered residual iron holes and is horizontally fixed, and a large-groove mold is placed in the molten iron main groove. According to the before-furnace channel repairing and hole repairing structure of the blast furnace, a refractory material in a molten iron main channel can be poured again for channel repairing, the inner wall of a hole channel of a residual iron hole is shaped, and hole repairing is achieved, so that when ramming materials are filled into a regular cylindrical hole channel of the shaped residual iron hole to block the hole, the pushing resistance of the ramming materials is smaller, the filling action is easier, and the hole repairing efficiency is improved. And in addition, timely pushing-in and comprehensive compacting can be achieved, the reliability of residual iron hole blocking is greatly guaranteed, and the risk that after the residual iron hole is blocked, gaps exist in the residual iron hole, and iron leakage is increased is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to blast furnace ironmaking tapping equipment technical field especially relates to a kind of blast furnace front ditch repair eye structure. BACKGROUND

[0002] Blast furnace front is provided with molten iron main ditch, ridge ditch, slag ditch, residual iron ditch, and each ditch is casted by refractory material.When tapping, in order to realize the separation of molten iron and slag, the main ditch is provided with skimming device, and the skimming device is disclosed in the patent document with Chinese patent number 201210281607.2, mainly by setting through beam on ditch body, and then using the characteristics that the density of slag is small and the density of molten iron is large, the slag floats above the molten iron, so that when passing through the skimming device, the slag is blocked in front of the through beam by the through beam, enters the slag ditch, and the molten iron passes through the through beam from the lower side of the through beam, enters the rear side of the skimming device, and then flows into the iron ditch, so that the separation of molten iron and slag is realized.

[0003] Residual iron eye is opened on the bottom side wall of the ditch body behind the skimming device through beam, and the residual iron eye serves as a slag discharge channel. When the erosion of refractory material in the ditch body reaches a certain degree, the refractory material in the ditch body needs to be re-cast, and the residual iron eye needs to be opened to clean the slag iron in the ditch body. After re-casting the refractory material in the ditch body, the residual iron eye needs to be plugged to restore the tapping function. There are two methods to open the residual iron eye: one is to directly drill it with a special residual iron eye opening machine, and the other is to first drill it to red dot with a rock drill and then burn it open with an oxygen blowing pipe. No matter which method is used to open the residual iron eye, after discharging the slag iron, there will be residual slag iron condensed in the residual iron eye. In order to avoid the influence of slag iron on the temperature of the residual iron eye during normal tapping, and to prevent the residual iron eye from being burned through due to the presence of slag iron inside, it is necessary to use an oxygen pipe to burn the residual slag iron condensed in the residual iron eye channel clean before plugging the residual iron eye with rammed material. After burning with the oxygen pipe, the residual iron eye channel is irregularly cylindrical, which is large at times and small at times. When plugging the irregular residual iron eye with dry material after burning, it is not only difficult to push the rammed material forward, but also time-consuming and laborious. Moreover, the rammed material is difficult to be compacted throughout the cross section, and there is a risk of iron leakage due to the existence of voids in the middle, which poses a great accident risk. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims to provide a kind of blast furnace front ditch repair eye structure.

[0005] The technical scheme for realizing the purpose of the utility model is: a furnace front ditch and eye repairing structure of a blast furnace, which comprises a molten iron main ditch, a residual iron eye horizontally formed on one side wall of the molten iron main ditch, the residual iron eye being in the shape of a circular truncated cone, the aperture of the first end of the residual iron eye being larger than the aperture of the second end, the first end of the residual iron eye being located at one end of the residual iron eye close to the molten iron main ditch, a cylindrical sleeper passing through the residual iron eye, the diameter of the sleeper being the same as the aperture of the second end of the residual iron eye, the sleeper being horizontally fixed, a large ditch mold being placed in the molten iron main ditch, the cross section of the large ditch mold being in the shape of a trapezoid with the upper part being wide and the lower part being narrow, and a gap being formed between the large ditch mold and the molten iron main ditch.

[0006] Further, one end of the horizontally fixed sleeper is supported on the second end of the residual iron eye, and the other end of the sleeper is supported on a cushion brick in the molten iron main ditch. The diameter of the sleeper is the same as the aperture of the second end of the residual iron eye, and one end of the horizontally fixed sleeper is directly supported on the second end of the residual iron eye without the need of additional support. The other end of the sleeper can be supported on the cushion brick in the molten iron main ditch, and the cushion brick has high structural strength, can stably support the sleeper when the refractory material is poured, and can form a refractory layer together with the refractory material after the pouring of the refractory material.

[0007] The furnace front ditch and eye repairing structure of the utility model can repair the ditch, reshape the inner wall of the residual iron eye hole, and repair the eye, and in the process of reshaping the inner wall of the residual iron eye hole, the residual iron eye is arranged in the shape of a circular truncated cone, and a cylindrical sleeper is horizontally arranged in the residual iron eye, so that the refractory material poured into the molten iron main ditch can enter the gap between the sleeper and the residual iron eye, the gap is filled, the irregular residual iron eye can be finally reshaped by burning through the oxygen pipe, a regular cylindrical hole is formed, and then when the tamping material is filled into the regular cylindrical hole of the residual iron eye for eye plugging, the tamping material is not blocked by the irregular inner wall of the hole, the resistance of the tamping material is smaller, the filling action is easier, and the operation is more time-saving and labor-saving. Because the tamping material is more easily pushed into the regular cylindrical hole of the residual iron eye, the tamping material is pushed into place quickly, the risk of the residual iron eye having a gap after the eye plugging due to the long-time failure of the tamping material to be pushed into place is greatly reduced, and in addition, in the regular cylindrical hole of the residual iron eye, the tamping material is in the stress surface at any position of the cross section, the tamping material is more reliable, and there is no gap due to the failure of the tamping material to be partially hit.

[0008] The utility model discloses a blast furnace furnace front ditch repair eye structure below, can be in the refractory material of big ditch inside re -pouring carry out ditch repair while, fill into the gap between the sleeper and the residual iron eye, realize the shaping of residual iron eye, and the operation of filling into the gap between the sleeper and the residual iron eye is carried out simultaneously with the re -pouring of the refractory material in the big ditch, and the high pouring position of the refractory material in the big ditch makes the refractory material enter the gap between the sleeper and the residual iron eye successfully, and the filling into the gap between the sleeper and the residual iron eye is completed, which easily solves the problem of filling into the gap between the sleeper and the residual iron eye, and the operation of filling into the gap between the sleeper and the residual iron eye is more convenient and reliable.

[0009] In addition, the utility model discloses a blast furnace furnace front ditch repair eye structure, the sleeper is passed through the residual iron eye that is burnt into a circular truncated cone, and when the sleeper is used as a mold for pouring into the residual iron eye, demolding is not needed subsequently, and only the sleeper needs to be ignited and burned, which greatly facilitates the demolding operation in the residual iron eye, especially after the skimmer is used, the temperature in the main iron channel is relatively high, and the situation of thermal expansion and cold contraction and difficult demolding is very difficult, which easily solves the problem of inconvenient demolding by igniting and burning the sleeper, and the problem of difficult demolding in the residual iron eye can be solved. Compared with the demolding mode of pulling out the mold in the residual iron eye, the refractory material poured into the residual iron eye is easily damaged by the pulling of the mold, but in the demolding mode of igniting and burning the sleeper, the inner wall of the residual iron eye channel is not pulled and stressed, the flatness and completeness are better, and the quality of the formed product is higher. At the same time, the ignited sleeper can also bake the refractory material in the residual iron eye, improve the structural strength of the refractory material in the residual iron eye, make the stability of the refractory material in the residual iron eye higher, and prolong the service life. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is the schematic diagram of the utility model discloses a blast furnace furnace front ditch repair eye structure. DETAILED DESCRIPTION

[0011] The preferred implementation of the utility model high furnace front ditch repair eye structure will be described in detail below with reference to the drawings:

[0012] As Figure 1 shown, a kind of high furnace front ditch repair eye structure, including molten iron main ditch 1, the horizontal residual iron eye 2 of being provided with on the side wall of one side of molten iron main ditch 1, the residual iron eye 2 is circular platform, the aperture of first end 21 of residual iron eye 2 is greater than the aperture of second end 22, first end 21 of residual iron eye 2 is located at one end side of residual iron eye 2 close to molten iron main ditch 1, a cylindrical sleeper 3 is burnt through residual iron eye 2, the diameter of sleeper 3 is same with the aperture of second end 22 of residual iron eye 2, sleeper 3 is horizontally fixed, molten iron main ditch 1 is placed with large ditch mould 10, the cross section of large ditch mould 10 is trapezoidal of being wide in upper and narrow in lower, large ditch mould 10 has gap with molten iron main ditch 1.

[0013] The utility model high furnace front ditch repair eye structure is used to high furnace front ditch and skimming device residual iron eye repair shape.In high furnace front ditch and skimming device residual iron eye repair shape, first, residual iron eye 2 is burnt into circular platform with burning oxygen pipe, and after sleeper 3 is burnt through residual iron eye 2 and large ditch mould 10 is placed into molten iron main ditch 1, from the gap between molten iron main ditch 1 and large ditch mould 10, refractory material is poured into molten iron main ditch 1, so that the gap between molten iron main ditch 1 and large ditch mould 10, the gap between sleeper 3 and residual iron eye 2 is filled with refractory material;After refractory material in the gap between molten iron main ditch 1 and large ditch mould 10, the gap between sleeper 3 and residual iron eye 2 is poured and formed, large ditch mould 10 is lifted away, and the ditch repair of molten iron main ditch 1 is completed;And sleeper 3 is removed from residual iron eye 2, such as sleeper 3 is lit, and after burning into ashes, the repair shape of inner wall of skimming device residual iron eye is completed.

[0014] The utility model discloses a blast furnace forehearth ditch and eye repairing structure, which can not only repair the ditch by recasting the refractory material in the main iron ditch 1 and repair the shape of the inner wall of the residual iron eye 2 hole to repair the eye, but also can make the refractory material poured into the main iron ditch 1 enter the gap between the sleeper 3 and the residual iron eye 2, fill the gap between the sleeper 3 and the residual iron eye 2, and finally reshape the irregular residual iron eye 2 by burning the oxygen pipe, so that a regular cylindrical hole is formed. Then, when the tamping material is filled into the regular cylindrical hole of the residual iron eye 2 to plug the eye, the tamping material is not blocked by the irregular hole wall, the resistance of the tamping material is smaller, the filling action is more relaxed, and the operation is more time-saving and labor-saving. Because the tamping material is easier to push into the regular cylindrical hole of the residual iron eye 2, the tamping material is pushed in quickly, can be pushed in place in time, and the risk of the residual iron eye 2 after plugging the eye having a gap due to the tamping material being unable to be pushed in place for a long time is greatly reduced. In addition, when the tamping material is tamped, the cross section of the tamping material at any position is in the stress surface, the tamping of the tamping material is more reliable, and there is no gap due to the partial cross section of the tamping material being unable to be tamped. The timely pushing of the tamping material into place and the comprehensive tamping greatly ensure the reliability of the residual iron eye 2 after plugging the eye, avoid the risk of the residual iron eye 2 after plugging the eye having a gap and increasing the risk of iron leakage, and reduce the hidden danger of accidents.

[0015] The utility model discloses a blast furnace furnace front ditch repair eye structure below, can be in the refractory material of big ditch inside re-pouring and repair ditch simultaneously, fill into the gap between the sleeper 3 and the residual eye 2 with the refractory material, realize the residual eye's shaping, and the refractory material is poured into the main iron ditch 1 in one action, and simultaneously complete the refractory material re-pouring in the big ditch and fill into the gap between the sleeper 3 and the residual eye 2 with the refractory material two operations, the efficiency of operation is high. And because the residual eye 2 is horizontal, fill into the horizontal gap between the sleeper 3 and the residual eye 2 with the refractory material alone, the open of horizontal end head makes its filling operation difficulty very big, to reduce the operation difficulty of filling into the horizontal gap between the sleeper 3 and the residual eye 2 with the refractory material, the utility model discloses a blast furnace furnace front ditch repair eye structure below, can let fill into the gap between the sleeper 3 and the residual eye 2 with the refractory material operation, and the refractory material re-pouring in the big ditch is carried out simultaneously, and the high pouring position of the refractory material in the big ditch makes the refractory material can smoothly enter the gap between the sleeper 3 and the residual eye 2, complete the filling in the gap between the sleeper 3 and the residual eye 2, and it easily solves the problem of filling into the gap between the sleeper 3 and the residual eye 2 with the refractory material, makes the operation of filling into the gap between the sleeper 3 and the residual eye 2 with the refractory material more convenient, reliable. Meanwhile, the residual eye 2 is set into the circular table shape, the structure below the first end 21 of the residual eye 2 aperture larger side close to one end side of the main iron ditch 1, the refractory material is more easy to enter the gap between the sleeper 3 and the residual eye 2, and it greatly guarantees the reliability of pouring into the residual eye 2, makes the shaping of the residual eye 2 channel more successful.

[0016] In addition, the utility model discloses a blast furnace furnace front ditch repair eye structure, the sleeper 3 is passed through the residual eye 2 of burning into the circular table shape, utilizes the sleeper 3 as the mould of pouring into the residual eye 2, need not demoulding subsequently, only need to ignite the sleeper 3 to burn the ember, it greatly facilitates the demoulding operation in the residual eye 2, especially after the skimmer is used, the temperature in the main iron ditch 1 is higher, and the difficulty of thermal expansion and contraction, demoulding is very big, it through the sleeper 3 is ignited and burns the ember, and the difficult problem of inconvenient demoulding is easily solved, and the problem of difficult demoulding in the residual eye 2 can be solved. And compared with the mould in the residual eye 2 is pulled out, the refractory material in the residual eye 2 is pulled by the mould of pulling out, and the demoulding mode of being easily destroyed, the demoulding mode of the sleeper 3 of the utility model is ignited and burns the ember, the residual eye 2 channel inner wall will not be forced to pull, and the flatness, the integrity is better, and the quality of forming is higher. Meanwhile, the sleeper 3 of ignition can also roast the refractory material in the residual eye 2, improve the structural strength of the refractory material in the residual eye 2, make the stability of the refractory material in the residual eye 2 higher, and the service life is longer.

[0017] The utility model discloses a blast furnace forehearth ditch and eye repairing structure, preferably, one end 31 of horizontal fixed the sleeper 3 is supported on the second end 22 of residual iron eye 2, and the other end 32 of sleeper 3 is supported on the cushion brick 4 in the molten iron main ditch 1. The diameter of sleeper 3 is consistent with the aperture of the second end 22 of residual iron eye 2, and one end 31 of horizontal fixed sleeper 3 is directly supported on the second end 22 of residual iron eye 2 without additional support. The other end 32 of sleeper 3 can be supported on the cushion brick 4 in the molten iron main ditch 1. The cushion brick 4 has high structural strength, and can stably support sleeper 3 when pouring refractory material. After pouring refractory material, the cushion brick 4 can form a refractory layer with the refractory material.

[0018] The utility model discloses a blast furnace forehearth ditch and eye repairing structure, preferably, one end 31 of horizontal fixed the sleeper 3 is supported on the second end 22 of residual iron eye 2, and the other end 32 of sleeper 3 is supported on the cushion brick 4 in the molten iron main ditch 1. The diameter of sleeper 3 is consistent with the aperture of the second end 22 of residual iron eye 2, and one end 31 of horizontal fixed sleeper 3 is directly supported on the second end 22 of residual iron eye 2 without additional support. The other end 32 of sleeper 3 can be supported on the cushion brick 4 in the molten iron main ditch 1. The cushion brick 4 has high structural strength, and can stably support sleeper 3 when pouring refractory material. After pouring refractory material, the cushion brick 4 can form a refractory layer with the refractory material.

Claims

1. A blast furnace forehearth structure for repairing a channel and a hole, comprising a main molten iron channel, a residual iron hole being horizontally formed on one side wall of the main molten iron channel, characterized in that: The residual iron eye is circular cone shaped, the first end of the residual iron eye has a larger aperture than the second end, the first end of the residual iron eye is located at one end of the residual iron eye close to the main iron channel, a cylindrical sleeper passes through the residual iron eye, the diameter of the sleeper is the same as the aperture of the second end of the residual iron eye, the sleeper is horizontally fixed, a large groove mold is placed in the main iron channel, the cross section of the large groove mold is trapezoidal with the upper part wider and the lower part narrower, and the large groove mold has a gap with the main iron channel.

2. The furnace front notch and eye repair structure of claim 1, wherein: One end of the horizontally fixed sleeper is supported on the second end of the residual iron eye, and the other end of the sleeper is supported on a cushion brick in the main iron channel.

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