Operation method for tapping iron notch of blast furnace tapping machine

Abstract

The invention discloses an operation method for tapping a taphole by a blast furnace taphole drill, which relates to the technical field of blast furnace operation and comprises the following steps: tapping the taphole in a taphole channel in a segmented form; a first section of iron notch is formed in the furnace wall part; when high-temperature stemming particles do not appear in the tapping process of the first section of iron notch, a second section of iron notch is formed in the joint of the furnace wall part and the balling drum part; when high-temperature stemming particles do not appear in the tapping process of the second section of iron notch, a third section of iron notch is formed in the mud drum part; the first section of iron notch, the second section of iron notch and the third section of iron notch are on the same straight line; according to the operation method, a conventional operation method is optimized and improved, so that the effect of timely and smoothly discharging blast furnace slag iron is achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of blast furnace operation, and more specifically, relates to an operation method for opening an iron hole of a blast furnace iron hole opening machine. Background Art

[0002] In the actual production process of the blast furnace, the smooth discharge of slag and iron plays a key role in the stable and smooth operation of the blast furnace. The operation method of the iron mouth opening machine is an important factor in the smooth discharge of slag and iron. However, the operation method of the iron mouth opening machine varies from person to person. Although it is generally the same, there are differences between them. Basically, the conventional operation is: drill a hole in the blast furnace according to the preset iron mouth channel direction. The drill bit rotates at high speed and rubs against the hard gun mud while being sprayed with atomized water. It can effectively take away the heat generated by friction, reduce the physical temperature of the drill bit, and ensure the strength of the drill bit. If the drill bit drills slowly, the drill rod is withdrawn and a new drill bit is replaced to continue drilling. This process is repeated until the iron mouth is opened.

[0003] Due to the influence of factors such as the different states of the blast furnace iron mouth, changes in the quality of the taphole mud, fluctuations in the furnace conditions, the equipment capacity of the taphole opening machine and different operating methods, it may cause the iron mouth to leak, the iron mouth to be difficult to open, or the iron flow rate at the iron mouth to be lower than the normal iron flow rate for a long time, resulting in the failure to discharge slag and iron in time, and even accidents such as iron blockage and reduced air flow in the blast furnace, which reduce the smelting intensity. Summary of the invention

[0004] The purpose of the present invention is to provide an operating method for opening a blast furnace taphole opening machine in view of the deficiencies in the prior art, wherein the operating method optimizes and improves the conventional operating method, thereby achieving the effect of timely and smooth discharge of blast furnace slag and iron.

[0005] In order to achieve the above object, the present invention provides an operation method for opening an iron hole of a blast furnace iron hole opening machine, comprising:

[0006] The taphole is opened in sections in the taphole channel;

[0007] Open the first iron hole in the furnace wall;

[0008] When no high-temperature taphole mud particles appear during the taphole opening process of the first taphole, a second taphole is opened at the connection between the furnace wall part and the mud bag part;

[0009] When no high-temperature taphole mud particles appear during the taphole opening process of the second taphole, the third taphole is opened at the mud bag part;

[0010] The first section of the iron mouth, the second section of the iron mouth and the third section of the iron mouth are on the same straight line.

[0011] Optionally, the drill bit is replaced according to the high-temperature taphole mud particles at the iron mouth boundary, the advancing speed of the drill rod and the degree of wear of the drill bit.

[0012] Optionally, the drill bit is replaced at the connecting section between the first section of the iron mouth and the second section of the iron mouth and at the connecting section between the second section of the iron mouth and the third section of the iron mouth.

[0013] Optionally, when red high-temperature taphole particles appear during the process of opening the first section of the taphole, the taphole drilling continues until the taphole is opened.

[0014] Optionally, when red high-temperature taphole particles appear during the process of opening the second section of the taphole, the taphole drilling continues until the taphole is opened.

[0015] Optionally, during the process of opening the second section of the taphole, red high-temperature taphole mud particles and iron flowers appear, and the spraying amount of atomized water needs to be increased.

[0016] Optionally, after the iron mouth is opened, if the molten iron flow rate at the iron mouth is far from reaching the normal flow rate after 20 minutes, the iron mouth is blocked with mud and reopened, or the iron tapping operation is continued at other iron mouths of the blast furnace.

[0017] Optionally, the second section of the iron mouth is located 200 mm outward along the iron mouth channel of the furnace wall to 200 mm along the iron mouth channel on the inner side of the furnace wall towards the mud bag side.

[0018] Optionally, the depth of the iron mouth opening does not exceed the depth of the second section of the iron mouth, and the operations of burning the iron mouth and drilling the iron mouth need to be performed simultaneously.

[0019] Optionally, the depth of the taphole opening is greater than the horizontal distance of the taphole area of ​​the blast furnace.

[0020] The present invention provides an operation method for opening a taphole of a blast furnace taphole opening machine, and the beneficial effects thereof are:

[0021] 1. This operation method improves the efficiency of taphole opening, ensures timely and smooth discharge of slag and iron, and is conducive to the stable operation of the blast furnace;

[0022] 2. This operation method can ensure that the iron mouth of the blast furnace is opened in time and smoothly, which reduces the labor intensity of the workers in front of the furnace and reduces the safety risks of the workers in front of the furnace;

[0023] 3. When using this operation method to open the iron mouth of the blast furnace, the number of drill rods and drill bits used can be saved, which is beneficial to reducing the cost of opening the iron mouth.

[0024] Other features and advantages of the present invention will be described in detail in the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] The above and other objects, features and advantages of the present invention will become more apparent through a more detailed description of exemplary embodiments of the present invention in conjunction with the accompanying drawings, wherein like reference numerals generally represent like components throughout the exemplary embodiments of the present invention.

[0026] Figure 1 A schematic diagram of an iron hole structure formed by an operation method for opening an iron hole by a blast furnace iron hole opening machine according to an embodiment of the present invention is shown.

[0027] Description of reference numerals:

[0028] 1. Iron mouth channel; 2. First section of iron mouth; 3. Inner side of furnace wall; 4. Second section of iron mouth; 5. Mud bag; 6. Third section of iron mouth. DETAILED DESCRIPTION

[0029] The preferred embodiments of the present invention will be described in more detail below. Although the preferred embodiments of the present invention are described below, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to make the present invention more thorough and complete, and to fully convey the scope of the present invention to those skilled in the art.

[0030] The present invention provides an operation method for opening a taphole of a blast furnace taphole opening machine. The taphole opening process can be operated in a segmented manner. When high-temperature taphole mud particles appear, the drilling state can be maintained until the taphole is opened, and there is no need to perform the next stage of taphole opening.

[0031] The iron mouth depth of a blast furnace is the original design thickness of the furnace wall in the iron mouth area plus the original mud bag thickness. The iron mouth is generally divided into three types: shallow iron mouth, leaky iron mouth and normal iron mouth. A shallow iron mouth refers to an iron mouth whose depth is less than or equal to the original design thickness of the furnace wall. In this case, the iron mouth can be smoothly opened by following the conventional method of opening the iron mouth; a leaky iron mouth refers to a crack in the iron mouth mud bag, and the molten iron does not flow out from the front of the iron mouth channel, but flows out from the crack (a leaky iron mouth is generally prone to appear at the junction of the mud bag and the furnace wall and its surrounding area). A leaky iron mouth may cause the molten iron flow rate to be far lower than that of a normal iron mouth, affecting the normal discharge of slag and iron, and even causing fluctuations in furnace conditions, blast furnace air blockage and other unfavorable factors. During the processing, due to the high-temperature and viscous slag and iron in the space of the iron mouth channel, a large amount of drill rods and drill bits will be consumed. In the process of using the drill rod to penetrate the iron mouth, the resistance to the drill rod and drill bit in the narrow iron mouth channel space is extremely large, and they may even stick together. The workers in front of the furnace are also required to burn the iron mouth with oxygen. During this process, a large amount of high-temperature slag and iron will splash out of the iron mouth at high speed, causing adverse effects on the safety of workers. According to the structure of the normal iron mouth, the normal iron mouth depth should be slightly larger than the thickness of the furnace lining in the iron mouth area and the molten iron should flow out from the normal iron mouth channel.

[0032] The iron mouth leaks easily at the junction of the mud bag and the furnace wall and the nearby area. The iron mouth leak may lead to the difficulty of opening the iron mouth, burning the iron mouth, or even mud blockage and re-opening of the iron mouth. In order to ensure the good working condition of the iron mouth and timely and smoothly discharge the slag and iron, and prevent the occurrence of the above adverse situations, the operation method divides the normal iron mouth channel stroke into three parts: the first section of the iron mouth is the iron mouth channel 200mm away from the inner side of the furnace wall; the second section of the iron mouth is 200mm outward along the iron mouth channel from the inner side of the furnace wall and 200mm along the iron mouth channel from the inner side of the furnace wall to the mud bag side; the third section of the iron mouth is the mud bag outside 200mm from the inner side of the furnace wall along the iron mouth channel.

[0033] When opening the iron mouth, the drill bit should be replaced at the connection point at the boundary of each part according to whether red high-temperature cannon mud particles are generated and the forward speed of the drill rod, so as to avoid the difficulty in opening the iron mouth due to untimely replacement of the drill bit. This can improve the efficiency of iron mouth opening and reduce the labor intensity of employees; reduce the use of drill bits and drill rods, and reduce the cost of iron mouth opening; and discharge the slag and iron as timely and smoothly as possible to ensure the stable and smooth operation of the blast furnace.

[0034] The specific operation method of the blast furnace taphole opening machine is as follows:

[0035] Drill a hole into the blast furnace according to the preset iron mouth channel direction. Judge the degree of wear of the drill bit according to the forward speed of the drill rod. If the drill rod drills slowly, the drill rod will be withdrawn and a new drill bit will be replaced to continue drilling.

[0036] If red high-temperature taphole mud particles fly out when the drill rod is in the first section of the normal taphole channel, continue to drill into the taphole to open it directly; if the drill rod does not move forward, replace the new drill bit and continue to drill into the taphole to open it directly; if the depth of the taphole is not greater than the thickness of the furnace wall, it indicates that the taphole is shallow.

[0037] If a small amount of red high-temperature cannon mud particles appear when the drill rod reaches the second section of the iron mouth when drilling the iron mouth in the normal iron mouth channel, the drill rod should be quickly withdrawn and the drill bit should be replaced to continue drilling along the iron mouth channel; if red high-temperature cannon mud particles appear accompanied by a small amount of splashing iron flowers, it is necessary to increase the spraying amount of atomized water and continue drilling along the iron mouth channel; if the depth of the iron mouth does not exceed the second part of the iron mouth channel stroke, it is necessary to quickly replace the drill bit and drill again; if the iron mouth depth still does not change, it can be judged that a leak has occurred, and it is necessary to perform iron mouth burning and iron mouth drilling operations alternately until the iron mouth molten iron flow rate reaches the normal iron mouth molten iron flow rate; if the normal iron mouth molten iron flow rate is still not reached after 20 minutes, it is necessary to block the mud and reopen the iron mouth or change to another iron mouth.

[0038] If there are no red high-temperature gun mud particles in the iron mouth channel when the drill rod is in the first and second sections of the normal iron mouth channel, when the iron mouth depth reaches the third section of the iron mouth, it can basically be judged as a normal iron mouth. If the drill rod does not move forward, it is necessary to consider replacing the drill bit and continue drilling into the iron mouth along the iron mouth channel until the iron mouth opens.

[0039] Example

[0040] like Figure 1 As shown, the present invention provides an operation method for opening an iron hole of a blast furnace iron hole opening machine, comprising:

[0041] The taphole is opened along the taphole channel 1, and the taphole is first opened by a drill rod and a drill bit to form a first taphole 2. The first taphole 2 is completely inside the furnace wall and is 200 mm away from the inner side 3 of the furnace wall. During the taphole opening process at this stage, no high-temperature taphole mud particles appear.

[0042] After replacing the drill rod and the drill bit, the taphole is opened along the taphole channel 1 to form the second taphole 4. The second taphole 4 enters the mud bag 5 from the furnace wall. The distance between the second taphole 4 and the inner side 3 of the furnace wall is 200 mm. In the taphole opening process at this stage, no high-temperature taphole mud particles appear.

[0043] According to the advancement speed of the drill rod of the second section iron mouth 4, check whether the drill bit needs to be replaced. After confirmation, continue to open the iron mouth along the iron mouth channel 1 until the iron mouth is opened, thereby forming the third section iron mouth 6, and the molten iron flow meets the production requirements.

[0044] The embodiments of the present invention have been described above, and the above description is exemplary, not exhaustive, and is not limited to the disclosed embodiments. Many modifications and changes will be apparent to those skilled in the art without departing from the scope and spirit of the described embodiments.

Claims

1. A method for operating a blast furnace tap hole opening machine, characterized in that: include: The taphole is opened in sections in the taphole channel; Open the first iron hole in the furnace wall; When no high-temperature taphole mud particles appear during the taphole opening process of the first taphole, a second taphole is opened at the connection between the furnace wall part and the mud bag part; When no high-temperature taphole mud particles appear during the taphole opening process of the second taphole, the third taphole is opened at the mud bag part; The first section of the iron mouth, the second section of the iron mouth and the third section of the iron mouth are on the same straight line.

2. The method for operating a blast furnace tap hole opening machine according to claim 1, characterized in that: Replace the drill bit according to the high-temperature taphole mud particles at the iron mouth boundary and the forward speed of the drill rod.

3. The method for operating a blast furnace tap hole opening machine according to claim 2, characterized in that: Replace the drill bit at the connecting section between the first section of the iron mouth and the second section of the iron mouth and the connecting section between the second section of the iron mouth and the third section of the iron mouth.

4. The method for operating a blast furnace tap hole opening machine according to claim 1, characterized in that: During the process of opening the first section of the taphole, when red high-temperature taphole mud particles appear, continue drilling the taphole until the taphole is opened.

5. The method for operating a blast furnace tap hole opening machine according to claim 4, characterized in that: During the process of opening the second section of the taphole, when red high-temperature taphole mud particles appear, continue drilling the taphole until the taphole is opened.

6. The method for operating a blast furnace tap hole opening machine according to claim 5, characterized in that: During the process of opening the second section of the taphole, red high-temperature taphole mud particles and iron flowers appeared, and the spray volume of atomized water needed to be increased.

7. The method for operating a blast furnace tap hole opening machine according to claim 1, characterized in that: After the iron mouth is opened, if the molten iron flow at the iron mouth is far from reaching the normal flow after 20 minutes, the iron mouth will be blocked with mud and reopened or the iron tapping operation will continue at other iron mouths of the blast furnace.

8. The method for operating a blast furnace tap hole opening machine according to claim 1, characterized in that: The second section of the iron mouth is located 200 mm outward along the iron mouth channel of the furnace wall to 200 mm along the iron mouth channel on the inner side of the furnace wall towards the mud bag side.

9. The method for operating a blast furnace tap hole opening machine according to claim 8, characterized in that: The depth of the tap hole opening does not exceed the depth of the second tap hole opening, and the tap hole burning and tap hole drilling operations need to be performed simultaneously.

10. The method for operating a blast furnace tap hole opening machine according to claim 1, characterized in that: The depth of the taphole opening is greater than the horizontal distance of the taphole area of ​​the blast furnace.

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