CN107084704B - Blast furnace body deflection detection method - Google Patents

Abstract

The present invention relates to a method for detecting the deflection of a blast furnace body, comprising the following steps: providing a blast furnace body and a distance measuring device, wherein the blast furnace body is arranged on a blast furnace base, and the blast furnace body has a furnace interior, at least one tuyere and a material surface mechanical measuring hammer, the tuyere is connected to the furnace interior, the material surface mechanical measuring hammer is perpendicular to the blast furnace base, and the distance measuring device is placed in the furnace interior through the tuyere; using the distance measuring device to scan the furnace interior to obtain a contour data group of the furnace interior; superimposing the contour data group with an original design mechanical drawing of the blast furnace to position the contour data group and the original design mechanical drawing of the blast furnace on the same coordinate; using the contour data group to find a furnace body center line; and calculating the parallelism between the furnace body center line and the material surface mechanical measuring hammer to evaluate whether the blast furnace body is deflected.

Description

Blast furnace body deflection detection method

technical field

The invention relates to a blast furnace detection method, in particular to a blast furnace body deflection detection method.

Background technique

Due to the advantages of high efficiency and high production capacity, blast furnace ironmaking has long been the main process for producing molten iron. The internal volume of today's blast furnace is often greater than 3,000 cubic meters, so it can be regarded as a huge high-temperature, high-pressure reaction system.

In the blast furnace ironmaking process, iron-containing raw materials and coke (reducing agent) are fed into the furnace in batches through a distribution trough, and material layers with different ore-coke ratio distributions are formed in the blast furnace. During the charging process, the distribution chute on the top of the furnace will rotate and discharge the material with the center of the furnace as the axis according to different set angles, so as to ensure that the distribution of the material layer on the circumference is symmetrical. Once the material surface is severely unbalanced, the blast furnace gas flow and feeding will be uneven, which will directly affect the production efficiency of the blast furnace.

Since the blast furnace is operated under high temperature and high pressure for a long time, the furnace body and the feeding system may be deflected and shifted, which will affect the circumferential uniformity of the material layer. Therefore, it is necessary to detect the deflection of the blast furnace body, but there is currently no effective method for evaluating the deflection of the blast furnace body.

Therefore, it is necessary to provide an innovative and progressive method for detecting the deflection of the blast furnace body to solve the above problems.

Contents of the invention

The invention provides a method for detecting the deflection of a blast furnace body, comprising the following steps: providing a blast furnace body and a distance measuring device, the blast furnace body is arranged on a blast furnace base, and the blast furnace body has a furnace interior, at least A tuyeres and a material level mechanical measuring hammer, the tuyere is connected to the inside of the furnace, the material level mechanical measuring hammer is perpendicular to the base of the blast furnace, the distance measuring device is placed inside the furnace through the tuyere; using the distance measuring device Scanning the interior of the furnace to obtain an outline data group inside the furnace; superimposing the outline data group with an original design mechanical drawing of the blast furnace so that the outline data group and the original design mechanical drawing of the blast furnace are positioned on the same coordinate; Using the contour data group to find a furnace body centerline; and calculating the parallelism between the furnace body centerline and the material surface mechanical measuring hammer, so as to evaluate whether the blast furnace body is skewed.

The present invention has established evaluation results in several blast furnaces inside Sinosteel. It provides a set of standard operating procedures for the evaluation of blast furnace body deflection and blanking position, and the obtained evaluation results can be used as a reference for blast furnace operators to maintain important reference.

In order to be able to understand the technical means of the present invention more clearly, it can be implemented according to the contents of the description, and in order to make the purpose, features and advantages of the present invention more obvious and easy to understand, the following special examples of preferred embodiments are given together with the accompanying drawings , detailed below.

Description of drawings

Fig. 1 is the flow chart of blast furnace body deflection detection method of the present invention;

Fig. 2 is a schematic sectional view of a blast furnace body in the method of the present invention;

Fig. 3 is the distribution diagram of the profile data group and the data group of material surface mechanical measuring hammer of the present invention furnace interior;

4A to 4C are graphs comparing the roundness of the measured profile data of the characteristic areas B1, B2, and B3 of FIG. 2 with the original design profile;

Fig. 5 is a distribution diagram of cross-sectional data groups obtained by scanning the blast furnace roof according to the present invention.

Detailed ways

Fig. 1 is a flow chart of the deflection detection method of the blast furnace body of the present invention. Fig. 2 is a schematic cross-sectional view of a blast furnace body in the method of the present invention. With reference to step S11 of FIG. 1 and FIG. 2 , a blast furnace body 10 and a distance measuring device 20 are provided.

The blast furnace body 10 is arranged on a blast furnace base 30 , and the blast furnace body 10 has a furnace interior 11 , at least one tuyere 12 , a material level mechanical measuring hammer 13 and a lower material tube 14 . The tuyere 12 and the feeding pipe 14 communicate with the furnace interior 11 . The material level mechanical measuring hammer 13 is perpendicular to the blast furnace base 30 .

The distance measuring device 20 is inserted into the furnace interior 11 through the tuyeres 12 . In this embodiment, the distance measuring device 20 is a three-dimensional laser distance measuring device.

Fig. 3 is a distribution diagram of the profile data group inside the furnace of the present invention and the data group of the material level mechanical measuring hammer. Referring to step S12 of FIG. 1 , FIG. 2 and FIG. 3 , the distance measuring device 20 is used to scan the furnace interior 11 to obtain a contour data group of the furnace interior 11 . In this step, the distance measuring device 20 further scans the feeding tube 14 to obtain the data group of the feeding tube 14 . In addition, the distance measuring device 20 also scans the material surface mechanical measuring hammer 13 to obtain the data group of the material surface mechanical measuring hammer 13 as a vertical reference index.

In addition, in this embodiment, the profile data group includes a plurality of profile profile data, and each profile profile data has a center point.

With reference to step S13 in FIG. 1 and FIG. 2 , the contour data group is superimposed on an original design mechanical drawing of a blast furnace, so that the contour data group and the original mechanical design design diagram of the blast furnace are positioned on the same coordinate. In this step, a circularity assessment may be performed on the profile data of the profile data group, the circularity assessment includes comparing the circularity of the profile data with the original design profile to confirm the profile data Whether the circularity conforms to the original design.

With reference to step S14 of FIG. 1 and FIG. 2 , a centerline L of the furnace body is found by using the contour data group. In this step, the center line L of the furnace body is formed according to a line connecting the center points of at least two section profile data.

With reference to step S15 of FIG. 1 and FIG. 2 , calculate the parallelism between the centerline L of the furnace body and the mechanical measuring hammer 13 of the material level, so as to evaluate whether the furnace body 10 of the blast furnace is deflected. In this step, it is also possible to check whether the centerline L of the furnace body passes through the center position of the measurement data group of the feeding pipe 14 to evaluate whether the position of the feeding pipe 14 is offset.

The following examples illustrate the present invention in detail, but it does not mean that the present invention is limited to the contents disclosed in these examples.

Example

Referring to Fig. 2 again, when the distance measuring device 20 scans, the material surface mechanical measuring hammer 13 of the furnace top is required to be lowered to a position of 20 meters on the spot as the vertical index of the furnace body. When the filling material is in operation, the distance measuring device 20 is placed in the inlet hole of the furnace roof to measure the material level.

After the distance measuring device 20 scans, select the characteristic areas B1, B2, B3, and superimpose the obtained outline data group with the mechanical drawing of the original design of the blast furnace, so that the outline data group and the mechanical drawing are placed on the same coordinate. In the example of the present invention, the furnace waist and bosh are selected as the basis for overlaying the map, and after the overlaying is completed, the circumference of the repaired area is evaluated.

Referring to FIGS. 4A to 4C , they respectively show the roundness comparison diagrams of the measured profile data of the characteristic regions B1 , B2 , and B3 in FIG. 2 and the original design profile. From Figures 4A to 4C, it can be found that the roundness of the measured section profile of the three gunning areas is consistent with the original design profile roundness, confirming that the circumference of the gunning area conforms to the original design.

When the circularity of the section profile is excellent, the center point of the section can be calculated (as shown in Figures 4A, 4B, and 4C), and connected to become the centerline of the furnace body. As mentioned above, it is required to put down the mechanical measuring hammer on the material surface during the measurement, and the mechanical measuring hammer on the material surface must be perpendicular to the base of the furnace body, so the parallelism relationship between the center line of the furnace body and the mechanical measuring hammer on the material surface can be used as Basis for assessment of furnace deflection. The parallelism between the center line of the furnace body calculated in this example and the mechanical measuring hammer on the material surface is good, and at the same elevation, the distance is 3.5 meters, which is consistent with the distance between the measuring hammer and the center of the furnace originally designed for the blast furnace. skewed.

Referring to FIG. 5 , it is a distribution diagram of cross-sectional data groups obtained by scanning the roof of a blast furnace according to the present invention. It can be seen from Figure 5 that the centerline of the furnace body (z direction) passes through the center of the circle in the distribution diagram on the two coordinate axes in the x-y direction, and the data group of this circle is the blanking tube of the blast furnace roof, which clearly shows the blanking tube The center of the tube is on the center line of the furnace body, showing that the design of the feeding system at the center of the furnace has not been shifted by operation.

The above-mentioned embodiments are only for illustrating the principles and effects of the present invention, and do not limit the present invention. Therefore, those skilled in the art can modify and change the above-mentioned embodiments without departing from the spirit of the present invention.

Explanation of reference signs

10 blast furnace body

11 Furnace interior

12 tuyeres

13 Material surface mechanical measuring hammer

14 Feed pipe

20 distance measuring device

30 Blast Furnace Base

B1, B2, B3 feature areas

L Center line of furnace body

Steps S11~S15.

Claims (8)

1. a kind of blast furnace skew detection method, comprising the following steps:

(a) it provides a blast furnace and a range unit, the blast furnace is set on a blast furnace base, and the blast furnace has There are a furnace interior, at least a blast orifice and a charge level machinery plummet, the blast orifice to be connected to the furnace interior, which hangs down Directly in the blast furnace base, which is placed in the furnace interior via the blast orifice；

(b) furnace interior is scanned using the range unit, to obtain an outline data group of the furnace interior；

(c) outline data group and a blast furnace original design machine drawing are overlapped, so that outline data group and the blast furnace are original Design machine drawing is located on same coordinate；

(d) a furnace body center line is found out using outline data group；And

(e) calculate the depth of parallelism of the furnace body center line Yu the charge level machinery plummet, with assess the blast furnace whether deflection.

2. blast furnace skew detection method as described in claim 1, which is characterized in that

The range unit of step (a) is laser ranging system.

3. blast furnace skew detection method as described in claim 1, which is characterized in that

It further include obtaining the data group of the charge level machinery plummet as vertical reference index in step (b).

4. blast furnace skew detection method as described in claim 1, which is characterized in that

The blast furnace has a feeder pipe, and the range unit of step (b) also scans the feeder pipe, to obtain the feeder pipe Data group.

5. blast furnace skew detection method as described in claim 1, which is characterized in that

Outline data group includes multiple section profile data, further includes carrying out one to these section profile data in step (c) It circumferentially assesses, circumferentially whether meets original design with confirm these section profile data.

6. blast furnace skew detection method as claimed in claim 5, which is characterized in that

It includes the out of roundness for comparing these section profile data and original design section profile that this, which is circumferentially assessed,.

7. blast furnace skew detection method as described in claim 1, which is characterized in that

Outline data group includes multiple section profile data, and respectively the section profile data have a centre point, and step (d) is somebody's turn to do Furnace body center line is formed according to the centre point line of at least two section profile data.

8. blast furnace skew detection method as described in claim 1, which is characterized in that

The blast furnace has a feeder pipe, and step (e) further includes the amount inspected the furnace body center line and whether pass through the feeder pipe The center of the data group of survey, to assess whether the position of the feeder pipe deviates.