Device and method for measuring upwarp angle of blast-furnace tuyere

Abstract

The invention discloses a blast furnace tuyere upwarp angle measuring device and method, and is applied to the technical field of ironmaking. A support bar; a first angle measuring member; the first angle measuring part comprises a measuring supporting body, a first protractor, a gradienter and a horizontal regulator, the first protractor and the horizontal regulator are both installed on the measuring supporting body, the gradienter is installed on the first protractor, a pointer part is arranged on the gradienter, and the pointer part is connected with the first protractor. The first protractor is provided with a scale circular ring, and a transmission part is arranged between the gradienter and the horizontal regulator so as to drive the gradienter and the pointer component to rotate relative to the scale circular ring when the horizontal regulator rotates. The blast-furnace tuyere upwarp angle measuring device provided by the invention is convenient to use, simple to manufacture, low in cost, convenient to measure at any time and low in difficulty.

Description

Technical Field

[0001] The invention relates to the technical field of ironmaking, and in particular to a device and method for measuring the upward angle of a blast furnace tuyere. Background Art

[0002] During the blast furnace smelting process, a large amount of hot air is sent into the blast furnace hearth through the blast furnace tuyere, and reacts with the injected coal powder and the hot coke descending to the hearth in an incomplete combustion reaction in front of the tuyere to generate high-temperature blast furnace gas rich in CO. The airflow carries part of the incompletely burned coke to form a vortex cavity in front of the tuyere, and completes the primary airflow distribution in the hearth. The primary airflow distribution directly affects the rationality of the airflow distribution in the center and edge of the blast furnace, as well as the working state of the hearth. Unreasonable primary airflow distribution will cause the blast furnace's ability to receive air volume to deteriorate, the wind pressure, pressure difference, etc. to increase, and the blast furnace's forward state to deteriorate. For the blast furnace smelting of high-titanium vanadium-titanium magnetite, it will further affect the fluidity of the slag iron in the hearth, easily causing accumulation in the center of the hearth, generating too much high-melting-point titanium carbonitride, and forming a vicious cycle effect on the furnace condition.

[0003] When the refractory material of the blast furnace hearth expands in volume, it will cause the tuyere sleeve to shift and warp upward, such as Figure 1 As shown in the figure, since the tuyere small sleeve is connected to the tuyere middle sleeve, when the tuyere middle sleeve is tilted up, the tuyere small sleeve connected to the tuyere middle sleeve will also be tilted up; after the tuyere is tilted up, the potential energy of the hot air reaching the deep part of the furnace is reduced, the primary airflow distribution of the blast furnace changes, and the blast furnace air supply adjustment cannot achieve a good effect, affecting the stable and smooth operation of the blast furnace. In the related technology, due to resource limitations, it is impossible to fundamentally solve the problem of high harmful element load entering the furnace.

[0004] Therefore, how to accurately and efficiently measure the upward angle of the blast furnace tuyere is a technical problem that technical personnel in this field currently need to solve. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for measuring the upward angle of a blast furnace tuyere, which are used to quickly and accurately measure the upward angle of a sleeve in a blast furnace tuyere to ensure the stability of the blast furnace's forward running state.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A device for measuring the upward angle of a blast furnace tuyere, comprising:

[0008] A limiter, used for contacting with the part of the blast furnace tuyere to be measured;

[0009] A support rod, one end of which is mounted on the stopper, the extension direction of the support rod is perpendicular to the extension direction of the stopper, and the support rod is adapted to the depth of the blast furnace tuyere;

[0010] A first angle measuring component, mounted on a side of the support rod away from the stopper, and used to obtain a first inclination angle of the support rod;

[0011] Furthermore, the first angle measuring component includes a measuring support body, a first protractor, a level and a level adjuster. The first protractor and the level adjuster are both mounted on the measuring support body. The level is mounted on the first protractor, and a pointer component is provided on the level. The first protractor is provided with a scale ring. A transmission member is provided between the level and the level adjuster to drive the level and the pointer component to rotate relative to the scale ring when the level adjuster rotates.

[0012] On the other hand, the measurement support body includes a first frame and a second frame, the first frame is square, the second frame is triangular, the first protractor and the level are installed in the first frame, and the level adjuster is installed on the side of the second frame away from the support rod.

[0013] On the other hand, the measuring support body includes a first frame and a second frame, the first frame is square, the second frame includes a first connecting edge, a hypotenuse and a second connecting edge, the first end of the first connecting edge is connected to the side of the first frame away from the support rod, the second end of the first connecting edge is connected to the first end of the hypotenuse, the second end of the hypotenuse is connected to the second end of the second connecting edge, the first end of the second connecting edge is connected to the side of the first frame close to the support rod, and the second connecting edge is installed on the support rod; the first protractor and the level are installed in the first frame, and the level adjuster is installed at the connection between the first connecting edge and the hypotenuse.

[0014] On the other hand, the limiting member and the support rod are both metal rods, and the limiting member and the support rod are welded and fixed; and / or the measurement support body is a metal member, which is welded and fixed to the support rod.

[0015] On the other hand, the level adjuster and the level are both provided with gears, and the transmission member is a chain, which is arranged around the gears on the level adjuster and the level, and the chain is meshed with the gears.

[0016] On the other hand, the support rod is a telescopic rod, and the first angle measuring component can move towards or away from the limiting member under the extension and retraction of the support rod.

[0017] On the other hand, it also includes a second angle measuring component, which is installed on the side of the support rod away from the limit member, and is used to obtain the second inclination angle of the support rod; the second angle measuring component includes a second protractor and a plumb line component, the second protractor is fixed on the support rod, and the fixed end of the plumb line component is located at the center of the second protractor.

[0018] On the other hand, the first angle measuring device is installed on the upper part of the support rod away from the limiting member, and the second angle measuring device is installed on the lower part of the support rod away from the limiting member.

[0019] A method for measuring the upward angle of a blast furnace tuyere, comprising:

[0020] Step S1: obtaining a blast furnace tuyere upturn angle measuring device, and debugging the blast furnace tuyere upturn angle measuring device through a vertical plane, and ensuring that the pointer component on the level is located at the 0° scale center line of the first protractor, and the plumb line component is located at the 0° scale center line of the second protractor;

[0021] Step S2: During the blast furnace production and smelting process, the measuring operator holds the blast furnace tuyere upward angle measuring device, extends the limiter from both sides of the straight blowing pipe of the blast furnace tuyere to the part to be measured, and ensures that the limiter abuts against the upper and lower edges of the part to be measured;

[0022] Step S3: adjusting the level adjuster by rotation so that the level reaches a horizontal state, reading the first inclination angle pointed by the pointer component in the first protractor, and reading the second inclination angle pointed by the plumb line component in the second protractor;

[0023] Step S4: Calculate an average value of the first inclination angle and the second inclination angle as the upward angle of the tuyere sleeve.

[0024] On the other hand, it also includes:

[0025] Step S5: Regularly inspect each tuyere in the blast furnace, measure and track the tilting angle ΔA of the sleeve in each tuyere, establish a database of changes in the tuyere sleeve angle A, establish a correlation database represented by the daily statistical values ​​of furnace condition parameters, and average each value in the correlation database in units of weeks; establish a comprehensive furnace condition evaluation index Z represented by the above parameters, Z=∑(X i *N i ), i represents each parameter, X iis the score of each parameter according to the set threshold (the score is divided into 11 equal parts of 0-100 points according to the threshold of each parameter, and the score of the corresponding parameter is obtained when each parameter falls into the respective set threshold area. The threshold segmentation range of each parameter is set in combination with the characteristics of the blast furnace itself and historical data statistics), N i is the weight of each parameter (the weight of each parameter is between 0 and 1, and the weight is set according to the importance of the parameter reflecting the blast furnace condition in combination with expert experience), the sum of the weights is 1, and the comprehensive evaluation index Z of the furnace condition obtained by adding them together will be between 0 and 100 points;

[0026] Step S6: After tracking the target time, establish a time-aligned association database of the tuyere sleeve upturned angle ΔA and the furnace condition comprehensive evaluation index Z, perform correlation statistics on the tuyere sleeve upturned angle ΔA and the furnace condition comprehensive evaluation index Z, and obtain the critical value ΔA of the tuyere sleeve upturned angle ΔA on the blast furnace condition L , critical value ΔA L The basis for determination is that when the tuyere upward angle ΔA exceeds a certain value, the comprehensive evaluation index Z of the furnace condition is significantly reduced (or the comprehensive evaluation index Z is lower than 70 points);

[0027] Step S7: According to the established database, the alkali metal load (K 2 O+ Na 2 O) Under certain conditions of the Zn load entering the furnace, the change rate k of the upward angle ΔA of each tuyere sleeve can be scientifically predicted to reach the critical value ΔA of the upward angle of the tuyere sleeve that has a significant impact on the furnace condition. L The time required T is combined with the upward angle ΔA of each tuyere sleeve i The actual measured value of the tuyere upward angle growth rate k is regularly corrected, and the critical value ΔA is reached by combining the average service life of the tuyere sleeve and the upward angle of the tuyere sleeve L The expected time for the blast furnace is to formulate a regular maintenance system to ensure that the regular maintenance time of the tuyere sleeve is within the average service life of the tuyere sleeve and is less than the critical value ΔA of the tuyere upward angle. L The time required is T.

[0028] The device for measuring the upward angle of a blast furnace tuyere provided by the present invention can accurately measure the upward angle of the portion to be measured of the blast furnace tuyere, such as the upward angle of the middle sleeve of the tuyere, by abutting the limiter with the portion to be measured of the blast furnace tuyere and utilizing the inclination of the support rod relative to the horizontal direction through the detection of the first angle measuring component, so as to facilitate blast furnace operators to analyze the furnace condition of the blast furnace and make timely corrections, thereby improving the stability of the blast furnace; at the same time, by utilizing the settings of the spirit level and the level adjuster, the rotation of the spirit level is driven by the rotation of the level adjuster, thereby driving the rotation of the pointer component, so that the upward angle of the portion to be measured of the blast furnace tuyere can be conveniently read from the first protractor; the device for measuring the upward angle of a blast furnace tuyere is easy to use, simple to manufacture, low in cost, convenient to measure at any time, and low in difficulty.

[0029] In one embodiment, by setting a second angle measuring component and utilizing the settings of a second protractor and a plumb line component, the inclination angle of the support rod can be measured in different ways, and the two readings of the first angle measuring component and the second angle measuring component can effectively reduce errors and improve measurement accuracy.

[0030] The method for measuring the upward angle of the blast furnace tuyere provided by the present invention can accurately and quickly measure the upward angle of the measured part of the blast furnace tuyere, and conduct regular tracking, so that the blast furnace operator can timely understand the upward degree of the tuyere, and timely analyze and take corresponding measures according to the influence of the upward degree of the tuyere on the effect of the blast furnace air supply system, so as to avoid the blast furnace from being severely upwardly tilted, resulting in unreasonable airflow distribution in the blast furnace, thereby destroying the smooth running state of the blast furnace. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or related technologies, the drawings required for use in the embodiments or related technical descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 It is a structural schematic diagram of a blast furnace tuyere;

[0033] Figure 2 A schematic structural diagram of a specific implementation of the blast furnace tuyere upturn angle measuring device provided by the present invention;

[0034] Figure 3 for Figure 2 A partially enlarged structural schematic diagram of a blast furnace tuyere upward angle measuring device is shown;

[0035] Figure 4 for Figure 2A schematic diagram of the abutment between the blast furnace tuyere upturn angle measuring device and the blast furnace tuyere is shown;

[0036] Figure 5 The present invention provides a flow chart of the method for measuring the upward angle of a blast furnace tuyere.

[0037] Reference numerals:

[0038] Direct blowing pipe 100; coal injection gun 200; large tuyere sleeve 300; middle tuyere sleeve 400; rear end of middle tuyere sleeve 401; small tuyere sleeve 500; inner cavity of small sleeve 501;

[0039] The limiting member 1; the supporting rod 2; the second protractor 3; the plumb line member 4; the first frame 5; the level 6; the level adjuster 7; the second frame 8; and the first protractor 9. DETAILED DESCRIPTION

[0040] The core of the present invention is to provide a device and method for measuring the upward angle of a blast furnace tuyere, which can improve the measurement efficiency and accuracy of the upward angle of the blast furnace tuyere and provide a basis for the maintenance of the blast furnace.

[0041] In order to enable those skilled in the art to better understand the solution of the present invention, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0042] During normal smelting, a coal injection gun 200 is installed on the blast furnace tuyere, and the hot blast from the blast furnace flows from the hot blast surrounding pipe through the gooseneck pipe, the horizontal straight blowing pipe 100, and the tuyere small sleeve 500 connected to the tuyere middle sleeve 400, and enters the furnace. The tuyere straight blowing pipe 100 passes through the tuyere large sleeve 300 and the tuyere middle sleeve 400, and the end of the tuyere is inserted into the front end of the tuyere middle sleeve 400 and connected with the tuyere small sleeve 500. The inside of the tuyere small sleeve 500 is a small sleeve inner cavity 501. The tuyere small sleeve 500 is inclined downward at a certain angle, so that the blast furnace hot blast has downward potential energy when it is blown into the furnace, and the stirring of the slag iron in the furnace is strengthened, as well as the heat transfer effect with the slag iron in the furnace, and at the same time, it helps to increase the depth of the blast furnace whirlpool area, so that more hot blast reaches the central area of ​​the blast furnace hearth, and achieves the effect of activating the center of the hearth. However, for some blast furnaces, especially those smelting high-titanium vanadium-titanium magnetite, the alkali load (K 2 O+Na 2O) is as high as 5~9kg / t, and the Zn load entering the furnace is as high as 1.10~2.0kg / t, which is much higher than the industry standard 3.0 kg / t alkali load and 0.15 kg / t Zn load entering the furnace. K, Na, and Zn are reduced by coke as the charge moves downward and become gaseous, and are circulated and enriched in the blast furnace, causing the actual alkali load and zinc load in the blast furnace to be much higher than the load value entering the furnace. Harmful elements such as gaseous alkali metals and zinc invade the refractory materials below the tuyere and the gaps in the refractory materials of the furnace hearth, and re-precipitate in liquid and solid forms under the cooling wall and tuyere water cooling, or react with the refractory materials to form oxides, causing the refractory materials to expand in volume, thereby causing the tuyere middle sleeve 400 to shift and warp, which drives the tuyere small sleeve 500 connected to the tuyere middle sleeve 400 to also warp.

[0043] Please refer to Figures 2 to 4 In this embodiment, the blast furnace tuyere upward angle measuring device includes:

[0044] The stopper 1 is used to abut against the part to be measured of the blast furnace tuyere; specifically, the part to be measured may be the rear end of each tuyere in the blast furnace, for example, the rear end 401 of the tuyere sleeve; the stopper 1 may be a metal frame or a metal sheet, and the material may be stainless steel, which is not easily deformed;

[0045] A support rod 2, one end of which is mounted on the stopper 1, the extension direction of the support rod 2 is perpendicular to the extension direction of the stopper 1, the support rod 2 is adapted to the depth of the blast furnace tuyere, and the support rod 2 is used to install the first angle measuring component;

[0046] A first angle measuring component is installed on a side of the support rod 2 away from the stopper 1 and is used to obtain a first inclination angle of the support rod 2;

[0047] In addition, the first angle measuring component includes a measuring support body, a first protractor 9, a spirit level 6 and a level adjuster 7. The first protractor 9 and the level adjuster 7 are both installed on the measuring support body. The spirit level 6 is installed on the first protractor 9, and a pointer component is provided on the spirit level 6. The first protractor 9 is provided with a scale ring. A transmission member is provided between the spirit level 6 and the level adjuster 7 to drive the spirit level 6 and the pointer component to rotate relative to the scale ring when the level adjuster 7 rotates.

[0048] The device for measuring the upward angle of the blast furnace tuyere provided by the present invention can accurately measure the upward angle of the part to be measured of the blast furnace tuyere, such as the upward angle of the tuyere middle sleeve 400, by abutting the limit member 1 with the part to be measured of the blast furnace tuyere and utilizing the inclination of the support rod 2 relative to the horizontal direction through the detection of the first angle measuring component, so as to facilitate the blast furnace operator to analyze the furnace condition of the blast furnace and correct it in time, thereby improving the stability of the blast furnace; at the same time, by utilizing the setting of the spirit level 6 and the level adjuster 7, the rotation of the spirit level 6 is driven by the rotation of the level adjuster 7, thereby driving the rotation of the pointer component, so that the upward angle of the part to be measured of the blast furnace tuyere can be conveniently read from the first protractor 9; the device for measuring the upward angle of the blast furnace tuyere is easy to use, simple to manufacture, low in cost, convenient to measure at any time, and low in difficulty.

[0049] In some embodiments, the measuring support body includes a first frame body 5 and a second frame body 8, the first frame body 5 is square, the second frame body 8 is triangular, the first protractor 9 and the level 6 are installed in the first frame body 5, and the level adjuster 7 is installed on the side of the second frame body 8 away from the support rod 2; specifically, the triangular second frame body 8 can not only be used to install the level adjuster 7, but also can act as a reinforcing rib to ensure the stability of the measuring support body.

[0050] In some embodiments, the measuring support body includes a first frame body 5 and a second frame body 8, the first frame body 5 is square, the second frame body 8 includes a first connecting edge, a hypotenuse and a second connecting edge, the first end of the first connecting edge is connected to the side of the first frame body 5 away from the support rod 2, the second end of the first connecting edge is connected to the first end of the hypotenuse, the second end of the hypotenuse is connected to the second end of the second connecting edge, the first end of the second connecting edge is connected to the side of the first frame body 5 close to the support rod 2, and the second connecting edge is installed on the support rod 2; the first protractor 9 and the level 6 are installed in the first frame body 5, and the level adjuster 7 is installed at the connection between the first connecting edge and the hypotenuse. This arrangement is to facilitate the operator to manually rotate and adjust the level adjuster 7, and the installation position of the level adjuster 7 is stable and the adjustment accuracy is high.

[0051] In some embodiments, it is characterized in that the limit member 1 and the support rod 2 are both metal rods with high strength and not easy to deform, and the limit member 1 and the support rod 2 are welded and fixed, the connection is stable, and the processing is convenient; and / or, the measurement support body is a metal part with high strength, welded and fixed on the support rod 2, and has high stability.

[0052] In some embodiments, gears are provided on the level adjuster 7 and the level 6, and the transmission member is a chain. The chain is arranged around the gears on the level adjuster 7 and the level 6, and the chain is meshed with the gears. Of course, the transmission member can also be a belt, and any method can be used to connect the level adjuster 7 and the level 6.

[0053] In some embodiments, the support rod 2 is a telescopic rod, and the first angle measuring component can move toward or away from the limit member 1 under the extension and retraction of the support rod 2; through the setting of the telescopic rod, it can be applicable to blast furnace tuyere of different sizes, thereby improving the scope of application.

[0054] In some embodiments, a second angle measuring component is further included, which is installed on the side of the support rod 2 away from the stopper 1 and is used to obtain the second inclination angle of the support rod 2; the second angle measuring component includes a second protractor 3 and a plumb line component 4, the second protractor 3 is fixed on the support rod 2, and the fixed end of the plumb line component 4 is located at the center of the second protractor 3. The above-mentioned setting, through the setting of the second angle measuring component, using the setting of the second protractor 3 and the plumb line component 4, can measure the inclination angle of the support rod 2 in different ways, and using the two readings of the first angle measuring component and the second angle measuring component, can effectively reduce errors and improve measurement accuracy.

[0055] In some embodiments, the first angle measuring device is installed on the upper part of the side of the support rod 2 away from the limit member 1, and the second angle measuring device is installed on the lower part of the side of the support rod 2 away from the limit member 1. This arrangement is to facilitate the operator to adjust the horizontal adjuster 7 from the top, which makes the operation more convenient. The first angle measuring device and the second angle measuring device are respectively arranged on the upper and lower parts of the limit member 1, and the layout is more reasonable.

[0056] Specifically, in a specific embodiment, a device for measuring the upward angle of an air outlet is designed and manufactured, and the device is composed of a non-deformable stopper 1, a support rod 2 perpendicular to the stopper 1, a fixed second protractor 3, a plumb line component 4, and a first protractor 9 with an adjustable level 6. The device for measuring the upward angle of the air outlet should meet the following requirements:

[0057] 1. The support rod 2 is welded and fixed to the front end limit piece 1 of the measuring device, and the support rod 2 is perpendicular to the limit piece 1 at 90°. The length of the support rod 2 is determined according to the depth of the blast furnace tuyere of each measured object; the support rod 2 is required to be not easy to deform, the support rod 2 is square, and the surface is flat.

[0058] 2. The length of the limiter 1 is slightly larger than the cavity height of the rear end 401 of the tuyere middle sleeve, but smaller than the minimum cavity height of the front end of the tuyere large sleeve 300, to ensure that the measuring device can extend from both sides of the straight blowing pipe 100 to the rear end 401 of the tuyere middle sleeve.

[0059] 3. The second protractor 3 is a metal protractor, which is horizontally fixed on the lower surface of the straight support rod 2. When the support rod 2 is placed horizontally, the plumb line component 4 is vertical and points to 0°. The scale of the second protractor 3 is marked from the vertical 0° to 90° and -90° on both sides. Of course, the vertical angle of the protractor can also be set to 90°, and the directions parallel to the support rod 2 are 180° and 0° respectively.

[0060] 4. The first protractor 9 with a spirit level 6 is a protractor with a metal frame, which is horizontally fixed on the upper surface of the support rod 2. The first protractor 9 consists of two parts, one part is a scale ring with an angle indicated that is fixedly welded to the measuring support body, and the other part is an inner ring with a spirit level 6 and a pointer component. The center of gravity of the inner ring always points vertically to the ground. There is a gear on one side of the inner ring, and the gears are connected by a fine chain. When the level adjuster 7 is rotated, the inner ring can be driven to rotate, so that the bubble of the spirit level 6 in the inner ring can be adjusted to the center position. When the support rod 2 is placed horizontally, that is, when it is placed horizontally perpendicular to the limiter 1 and the first protractor 9 is perpendicular to the ground, the spirit level 6 is horizontal and the water drop is in the center position, and the pointer component points to the 0° angle scale of the first protractor 9. When the support rod 2 is tilted and the spirit level 6 has not reached a completely horizontal state, the level adjuster 7 is rotated to drive the inner ring to rotate through gears and fine chains, so that the spirit level 6 can be adjusted to a horizontal state. At the same time, the pointer component rotates following the rotation adjustment of the inner ring to point to the corresponding tilt angle; at the same tilt angle, the angle values ​​measured by the second protractor 3 and the first protractor 9 are consistent.

[0061] In addition to the above-mentioned blast furnace tuyere upturn angle measuring device, the present invention also provides a blast furnace tuyere upturn angle measuring method. Figure 5 The method for measuring the upward angle of the blast furnace tuyere comprises the following steps:

[0062] Step S1: Obtain a blast furnace tuyere upturn angle measuring device, and debug the blast furnace tuyere upturn angle measuring device through a vertical plane, and ensure that the pointer component on the level 6 is located at the 0° scale center line of the first protractor 9, and the plumb line component 4 is located at the 0° scale center line of the second protractor 3;

[0063] Step S2: During the blast furnace production and smelting process, the measuring operator holds the blast furnace tuyere upward angle measuring device, extends the limiter 1 from both sides of the straight blowing pipe 100 of the blast furnace tuyere to the position to be measured, and ensures that the limiter 1 abuts against the upper and lower edges of the position to be measured; for example, extend the limiter 1 from both sides of the straight blowing pipe 100 of the blast furnace tuyere through the inner cavity of the tuyere large sleeve 300 to the rear end of the tuyere middle sleeve 400, and ensure that the limiter 1 abuts against the upper and lower edges of the rear end of the tuyere middle sleeve 400;

[0064] Step S3: by rotating and adjusting the level adjuster 7, the level meter 6 reaches a horizontal state, reading the first inclination angle pointed by the pointer component in the first protractor 9, and reading the second inclination angle pointed by the plumb line component 4 in the second protractor 3;

[0065] Step S4: Calculate the average value of the first inclination angle and the second inclination angle as the upward angle of the tuyere middle sleeve 400 .

[0066] Specifically, a vertical glass surface is used to debug the measuring device. The front-end stopper 1 of the measuring device is in parallel contact with the vertical glass surface, ensuring that the plumb line component 4 points to the 0° scale center line of the second protractor 3, the bubble of the level 6 in the first protractor 9 is in the middle position, and the inner ring pointer component points to the 0° center line of the scale ring, that is, the angle values ​​measured by the second protractor 3 and the first protractor 9 are consistent. In the blast furnace production and smelting process, two measuring operators hold the tuyere upturn angle measuring device, and extend the stopper 1 at the front end of the measuring device from both sides of the straight blowing pipe 100 through the inner cavity of the tuyere large sleeve 300 to the rear end 401 of the tuyere middle sleeve. One person ensures that the stopper 1 is pressed against the upper and lower edges of the rear end 401 of the tuyere middle sleeve. By rotating and adjusting the level adjuster 7 to make the level 6 reach a horizontal state, reading the angle value pointed to in the first protractor 9 with the level 6, and the angle pointed to by the plumb line component 4, the upturn angle of the tuyere middle sleeve 400 can be obtained. When measuring the same tuyere, it is necessary to measure both sides of the straight blowing pipe 100 and take the average value to reduce the error of the measurement process.

[0067] During the measurement process, when the tuyere sleeve 400 does not warp up, the upper and lower edges of the rear end 401 of the tuyere sleeve are perpendicular to the center line of the tuyere, and the limiter 1 at the front end of the measuring device will be in a parallel vertical plane with the rear end 401 of the tuyere sleeve. At this time, the support rod 2 will remain horizontal, and the plumb line component 4 will point vertically to the 0° scale of the second protractor 3. The level 6 in the first protractor 9 will be horizontal, and the bubble will be located in the middle of the level 6. The pointer component of the inner ring will point to the 0° scale of the outer ring of the first protractor 9. Therefore, the measured upward angle of the tuyere is 0°. When the tuyere sleeve 400 tilts upward, the support rod 2 will no longer be horizontal, but will be at a certain angle to the horizontal plane. The plumb line component 4 will point to the angle scale on the second protractor 3 under the action of gravity, that is, the degree of deviation from 0°, which is the tilt angle of the tuyere sleeve 400. At the same time, the water droplet of the level gauge 6 in the first protractor 9 above the support rod 2 will not be in the center position, and the level regulator 7 needs to be rotated to make the level gauge 6 reach a horizontal state. The pointer component in the first protractor 9 will also rotate to point to the scale value on the scale ring, which is the tilt angle of the tuyere sleeve 400. Through the joint measurement of the two protractors, even if there is a slight difference in the angle, taking the average value can improve the overall accuracy of the result.

[0068] In some embodiments, it further comprises:

[0069] Step S5: Regularly inspect each tuyere in the blast furnace, measure and track the upward angle ΔA of the sleeve 400 of each tuyere, establish a database of changes in the angle A of the sleeve 400 of the tuyere, establish a correlation database represented by the daily statistical values ​​of furnace condition parameters, and average each value in the correlation database in units of weeks; wherein the furnace condition parameters include blast furnace air volume, blast furnace iron production, blast furnace fuel ratio, blast furnace alkali metal load (K 2 O+ Na 2 O), Zn load into the furnace, etc.; Taking the above parameters as representatives, establish the comprehensive evaluation index Z of furnace condition, Z=∑(X i *N i ), i represents each parameter, X i is the score of each parameter according to the set threshold (the score is divided into 11 equal parts of 0-100 points according to the threshold of each parameter, and the score of the corresponding parameter is obtained when each parameter falls into the respective set threshold area. The threshold segmentation range of each parameter is set in combination with the characteristics of the blast furnace itself and historical data statistics), N i is the weight of each parameter (the weight of each parameter is between 0 and 1, and the weight is set according to the importance of the parameter reflecting the blast furnace condition in combination with expert experience), the sum of the weights is 1, and the comprehensive evaluation index Z of the furnace condition obtained by adding them together will be between 0 and 100 points;

[0070] Step S6: After tracking the target time, for example, the target time can be one year or longer, a time-aligned association database of the tuyere middle sleeve 400 upward angle ΔA and the furnace condition comprehensive evaluation index Z is established, and the correlation statistics of the tuyere upward angle ΔA and the furnace condition comprehensive evaluation index Z are performed to obtain the critical value ΔA of the influence of the tuyere middle sleeve 400 upward angle ΔA on the blast furnace condition. L , critical value ΔA L The basis for determination is that when the tuyere upward angle ΔA exceeds a certain value, the comprehensive evaluation index Z of the furnace condition is significantly reduced (or the comprehensive evaluation index Z is lower than 70 points);

[0071] Step S7: According to the established database, the alkali metal load (K 2 O+ Na 2 O) Under certain conditions of the Zn load entering the furnace, the change rate k of the upward angle ΔA of each tuyere sleeve 400, so as to scientifically predict the critical value ΔA of the upward angle ΔA of the tuyere sleeve 400 that has a significant impact on the furnace condition. L The time T required is combined with the upward angle ΔA of the 400° sleeve of each tuyere. iThe actual measured value of the tuyere upward angle growth rate k is regularly corrected, and combined with the average service life of the tuyere middle sleeve 400 and the tuyere middle sleeve 400 upward angle reaching the critical value ΔA L The expected time, formulate the blast furnace regular maintenance system, ensure that the regular maintenance time of the tuyere sleeve 400 is within the average service life of the tuyere sleeve 400, and is less than the critical value ΔA of the tuyere upward angle L The time required is T.

[0072] Through the above process, it is possible to effectively avoid serious upward warping of part of the tuyere middle sleeve 400, which affects the uniformity of the blast furnace hearth operation, and also avoid frequent extension of the blast furnace shutdown time to correct the tuyere middle sleeve 400, thereby reducing the damage of the shutdown to the forward running state of the blast furnace.

[0073] In the first specific embodiment, the blast furnace A uses vanadium-titanium magnetite as the main raw material, and the alkali load (K 2 O+Na 2O) has reached 7kg / t-8.5kg / t for a long time, and the Zn load entering the furnace has continued to be 1.5kg / t-1.7kg / t. When the quality of the raw materials and fuels has not changed significantly, the blast furnace's wind-bearing capacity has deteriorated, and the blast furnace wind pressure and pressure difference have increased by more than 10KPa under the same air volume. In order to prevent the blast furnace from having excessive pressure difference and causing production accidents such as blast furnace pipeline travel and suspended materials, Blast Furnace A was forced to frequently reduce the wind in stages to alleviate the relationship between the wind volume and wind pressure. However, it was found that after each wind reduction, the wind volume was difficult to return to the average state of the previous stage, and the air flow in the center of the blast furnace became significantly weaker. The overall air volume of the blast furnace shrank and decreased by nearly 300m³ / min, which had a very adverse effect on the stable and smooth operation of the blast furnace. However, whether the blast furnace adjusted coal injection, oxygen enrichment, etc., it was difficult to improve the furnace condition of Blast Furnace A, and the number of damaged tuyere sleeves reached 2-4 every half a month. During a wind stop to replace the tuyere sleeve, silvery white metal liquid flowed out from the tuyere area. The solidified metal was analyzed and detected. The metal was mainly a mixture of zinc, lead, K and Na. Therefore, the enrichment of harmful elements such as Zn, Pb, K and Na may affect the uniformity of the tuyere operation. The operator of A blast furnace used the measuring device of the present invention to measure the 24 tuyere sleeves of A blast furnace respectively. The upward angle of each tuyere sleeve reached an average of 3.5°, and the upward angle of some tuyere sleeves even reached 10°. During the measurement process, the second protractor located below the support rod and the first protractor above the measuring angle deviation were less than 0.2°. Under production pressure, A blast furnace did not have a long-term wind stop and maintenance plan in the short term. Therefore, A blast furnace took the appropriate extension of the planned time for short-term wind stop, and corrected the 4 tuyere sleeves with upward angles exceeding 6°. After 2 days of wind recovery, the wind condition of the blast furnace was significantly improved. Afterwards, A blast furnace used the wind stop opportunity to correct other tuyere sleeves with more upward angles, and the furnace condition returned to a continuous and stable state. After recognizing the hazards of the warping of the tuyere sleeve, Blast Furnace A established a system for regular inspection and measurement of the tuyere sleeve, and established a correlation database between the comprehensive evaluation index Z of furnace condition and the tuyere warping angle ΔA. After nearly 2 years of follow-up and analysis, it was found that when the warping angle ΔA of the tuyere sleeve exceeded 4°, and the number of tuyere sleeves with warping angles greater than ΔA reached more than 1 / 6 of the total number of tuyere sleeves, it would have a significant adverse effect on the lower adjustment of the blast furnace and the furnace condition, causing the comprehensive evaluation index Z of the furnace condition to decrease and continue to be less than 70 points, and the average time for each tuyere sleeve to warp from 0° to 4° was 50 days. Therefore, Blast Furnace A adjusted the original 60-day repair cycle to 50 days, and calibrated the tuyere sleeve in time, eliminating the problem of being forced to extend the short-term shutdown time when replacing the tuyere sleeve due to temporary processing of the tuyere sleeve.

[0074] In the second specific embodiment, the blast furnace B uses vanadium-titanium magnetite as the main production raw material, and the alkali load (K 2 O+Na 2O) has been maintained at 5kg / t-6.5kg / t for a long time, and the Zn load in the furnace has been maintained at 1.1kg / t-1.4kg / t. In order to increase the output of the blast furnace, B blast furnace has adopted low furnace temperature smelting operation for more than 6 months. Although the output of the blast furnace has been improved, the desulfurization capacity of the molten iron has been reduced, and the slag TiO 2 The content often rises to more than 23%. Under the pressure of increasing steelmaking desulfurization, B blast furnace compromised and adopted the method of increasing the binary basicity of slag, which reduced the alkali removal capacity of slag. Therefore, in the case of no significant change in the quality of raw materials and fuels, after a period of high production, in the following month, B blast furnace suddenly began to experience frequent fluctuations in the static pressure of the furnace body, and the wind pressure and pressure difference increased in stages. The blast furnace was forced to perform frequent wind reduction operations. In order to improve the fluidity of blast furnace slag, the charge structure was increased by 2 percentage points of TiO 2 Low-grade lump ore with low content but high alkali metal content, thus reducing the TiO 2 The measures of reducing the content of the gas were adopted, but the condition of the blast furnace was not significantly improved; the lower adjustment measures such as adjusting coal injection, oxygen enrichment, and tuyere area were adopted, but the condition of the blast furnace was not significantly improved. The operator of B blast furnace used the measuring device of the present invention to measure the tuyere sleeves 400 of each tuyere sleeve 400 of B blast furnace respectively. The upward angle of each tuyere sleeve 400 reached an average of 4.2°, and the upward angle of 3 tuyere sleeves 400 exceeded 7°. During the measurement process, the second protractor 3 located below the support rod 2 and the first protractor 9 above the support rod measured an angle deviation of less than 0.2°; B blast furnace promptly formulated a wind-down maintenance plan, and corrected the 6 tuyere sleeves 400 with upward angles exceeding 5°. After 3 days of re-winding, the wind condition of the blast furnace was significantly improved, and the air volume was restored to normal. Afterwards, B blast furnace established a system for regular inspection and measurement of tuyere middle sleeve 400, and also established a database correlating the upward angle of tuyere middle sleeve 400 and the comprehensive furnace condition index Z. After 18 months of follow-up and analysis, it was found that when the upward angle of tuyere middle sleeve 400 exceeded 4° and the number of upward tuyere middle sleeve 400 reached more than 1 / 6, it would have a significant adverse effect on the lower adjustment and furnace condition of the blast furnace. The comprehensive furnace condition index Z of the blast furnace continued to decrease, and the proportion below 70 points increased. Therefore, it is believed that when the upward angle of the tuyere reaches 4° and the proportion exceeds 1 / 6, the tuyere middle sleeve 400 should be corrected in time.

[0075] It can be seen from the above embodiments that the device and method for measuring the upward angle of the blast furnace tuyere can accurately and quickly measure the upward angle of the blast furnace tuyere middle sleeve 400, and conduct regular tracking, so that the blast furnace operators can timely understand the upward degree of the tuyere, and timely analyze and take corresponding measures for the influence of the upward degree of the tuyere on the effect of the blast furnace air supply system, so as to avoid the blast furnace from being severely upwardly tilted, resulting in unreasonable airflow distribution in the blast furnace, thereby destroying the forward running state of the blast furnace. The device and method for measuring the upward angle of the blast furnace tuyere can accurately and quickly measure the upward angle of the blast furnace tuyere middle sleeve 400, and conduct regular tracking, so as to facilitate the blast furnace operators to timely understand the upward degree of the tuyere, and conduct timely analysis and take corresponding measures for the influence of the upward degree of the tuyere on the effect of the blast furnace air supply system, so as to avoid the blast furnace from being severely upwardly tilted, resulting in unreasonable airflow distribution in the blast furnace, thereby destroying the forward running state of the blast furnace. The device and method for measuring the upward angle of the blast furnace can be used to measure the upward angle of the blast furnace, and the upward angle of the blast furnace can be used to measure the upward angle of the blast furnace, so as to achieve the goal of measuring the upward angle of the blast furnace.

[0076] The above is a detailed introduction to the blast furnace tuyere upturn angle measurement device and method provided by the present invention. Specific examples are used herein to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method of the present invention and its core idea. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present invention, the present invention can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the present invention.

Claims

1. A device for measuring the upward angle of a blast furnace tuyere, characterized in that: include: A stopper (1) is used to abut against a portion of a blast furnace tuyere to be measured; A support rod (2), one end of which is mounted on the stopper (1), the extension direction of the support rod (2) being perpendicular to the extension direction of the stopper (1), and the support rod (2) being adapted to the depth of the blast furnace tuyere; A first angle measuring component, mounted on a side of the support rod (2) facing away from the stopper (1), and used to obtain a first inclination angle of the support rod (2); Furthermore, the first angle measuring component comprises a measuring support body, a first protractor (9), a level (6) and a level adjuster (7); the first protractor (9) and the level adjuster (7) are both mounted on the measuring support body; the level (6) is mounted on the first protractor (9); a pointer component is provided on the level (6); a scale ring is provided on the first protractor (9); a transmission member is provided between the level (6) and the level adjuster (7) so as to drive the level (6) and the pointer component to rotate relative to the scale ring when the level adjuster (7) rotates.

2. The device for measuring the upward angle of a blast furnace tuyere according to claim 1, characterized in that: The measuring support body comprises a first frame (5) and a second frame (8), the first frame (5) being square, the second frame (8) being triangular, the first protractor (9) and the level (6) being mounted in the first frame (5), and the level adjuster (7) being mounted on a side of the second frame (8) facing away from the support rod (2).

3. The device for measuring the upward angle of blast furnace tuyere according to claim 1, characterized in that: The measuring support body comprises a first frame (5) and a second frame (8); the first frame (5) is square; the second frame (8) comprises a first connecting edge, a hypotenuse and a second connecting edge; the first end of the first connecting edge is connected to a side of the first frame (5) away from the support rod (2); the second end of the first connecting edge is connected to the first end of the hypotenuse; the second end of the hypotenuse is connected to the second end of the second connecting edge; the first end of the second connecting edge is connected to a side of the first frame (5) close to the support rod (2); and the second connecting edge is mounted on the support rod (2); the first protractor (9) and the level (6) are mounted in the first frame (5); and the level adjuster (7) is mounted at the connection between the first connecting edge and the hypotenuse.

4. The device for measuring the upward angle of blast furnace tuyere according to claim 1, characterized in that: The limiting member (1) and the support rod (2) are both metal rods, and the limiting member (1) and the support rod (2) are welded and fixed thereto; and / or the measurement support body is a metal member, and is welded and fixed to the support rod (2).

5. The device for measuring the upward angle of blast furnace tuyere according to claim 1, characterized in that: The level adjuster (7) and the level gauge (6) are both provided with gears, and the transmission member is a chain, the chain is arranged around the gears on the level adjuster (7) and the level gauge (6), and the chain is meshed with the gears.

6. The device for measuring the upward angle of a blast furnace tuyere according to any one of claims 1 to 5, characterized in that: The support rod (2) is a telescopic rod, and the first angle measuring component can move towards or away from the limiting component (1) under the extension and retraction of the support rod (2).

7. The device for measuring the upward angle of a blast furnace tuyere according to any one of claims 1 to 5, characterized in that: The invention also comprises a second angle measuring component, which is mounted on a side of the support rod (2) away from the stopper (1) and is used to obtain a second inclination angle of the support rod (2); the second angle measuring component comprises a second protractor (3) and a plumb line component (4), the second protractor (3) being fixed on the support rod (2), and the fixed end of the plumb line component (4) being located at the center of the second protractor (3).

8. The device for measuring the upward angle of blast furnace tuyere according to claim 7, characterized in that: The first angle measuring device is installed on the upper part of the support rod (2) on the side facing away from the limiting member (1), and the second angle measuring device is installed on the lower part of the support rod (2) on the side facing away from the limiting member (1).

9. A method for measuring the upward angle of a blast furnace tuyere, using the device for measuring the upward angle of a blast furnace tuyere as claimed in claim 7 or 8, characterized in that: include: Step S1: obtaining a blast furnace tuyere upward angle measuring device, and debugging the blast furnace tuyere upward angle measuring device through a vertical plane, and ensuring that the pointer component on the level (6) is located at the 0° scale center line of the first protractor (9), and the plumb line component (4) is located at the 0° scale center line of the second protractor (3); Step S2: During the blast furnace production and smelting process, a measuring operator holds the blast furnace tuyere upward angle measuring device, extends the stopper (1) from both sides of the straight blowing pipe (100) of the blast furnace tuyere to the part to be measured, and ensures that the stopper (1) abuts against the upper and lower edges of the part to be measured; Step S3: adjusting the level adjuster (7) by rotation so that the level instrument (6) reaches a horizontal state, reading the first inclination angle pointed by the pointer component in the first protractor (9), and reading the second inclination angle pointed by the plumb line component (4) in the second protractor (3); Step S4: calculating an average value of the first inclination angle and the second inclination angle as the upward tilting angle of the tuyere middle sleeve (400).

10. The method for measuring the upward angle of a blast furnace tuyere according to claim 9, characterized in that: Also includes: Step S5: Regularly inspect each tuyere in the blast furnace, and measure and track the upward angle ΔA of each tuyere sleeve (400), establish a database of changes in the angle A of the tuyere sleeve (400), establish a correlation database represented by the daily statistical values ​​of furnace condition parameters, and average each value in the correlation database in units of weeks; establish a comprehensive furnace condition evaluation index Z represented by the above parameters, Z=∑(X i *N i ), i represents each parameter, X i is the score of each parameter according to the set threshold (the score is divided into 11 equal parts of 0-100 points according to the threshold of each parameter, and the score of the corresponding parameter is obtained when each parameter falls into the respective set threshold area. The threshold segmentation range of each parameter is set in combination with the characteristics of the blast furnace itself and historical data statistics), N i is the weight of each parameter (the weight of each parameter is between 0 and 1, and the weight is set according to the importance of the parameter reflecting the blast furnace condition in combination with expert experience), the sum of the weights is 1, and the comprehensive evaluation index Z of the furnace condition obtained by adding them together will be between 0 and 100 points; Step S6: After tracking the target time, a time-aligned correlation database of the tuyere middle sleeve (400) upward angle ΔA and the furnace condition comprehensive evaluation index Z is established, and correlation statistics are performed on the tuyere upward angle ΔA and the furnace condition comprehensive evaluation index Z to obtain the critical value ΔA of the influence of the tuyere middle sleeve (400) upward angle ΔA on the blast furnace condition. L , critical value ΔA L The basis for determination is that when the tuyere upward angle ΔA exceeds a certain value, the comprehensive evaluation index Z of the furnace condition is significantly reduced (or the comprehensive evaluation index Z is lower than 70 points); Step S7: According to the established database, the change rate k of the upward angle ΔA of each tuyere sleeve (400) under certain conditions of the alkali metal load (K2O+ Na2O) and the Zn load is obtained, so as to scientifically predict the critical value ΔA at which the upward angle ΔA of the tuyere sleeve (400) has a significant impact on the furnace condition. L The time T required is combined with the upward angle ΔA of each tuyere sleeve (400) i The actual measured value of the tuyere upward angle growth rate k is regularly corrected, and combined with the average service life of the tuyere middle sleeve (400) and the tuyere middle sleeve (400) upward angle reaching the critical value ΔA L The expected time, formulate the blast furnace regular maintenance system, ensure that the regular maintenance time of the tuyere sleeve (400) is within the average service life of the tuyere sleeve (400), and is less than the critical value ΔA of the tuyere upward angle. L The time required is T.

Images