JPH0474921A - Measuring method for surface area of coke block - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a method for measuring the surface area of a coke lump.

[Prior Art and Problems to be Solved by the Invention] The characteristics of coke lumps have a great influence on coke production and the production efficiency of blast furnaces that use coke.

One of these characteristics is the total surface area of the coke mass, including the exposed surface of cracks in the coke mass (hereinafter referred to as the total surface area).
Also, the diameter equivalent to an equal surface area and the side equivalent to an equal surface area, which correspond to the diameter of a sphere having a surface area equal to the total surface area and the length of one side of a cube, can be mentioned.

Conventionally, it has been impossible to measure the total surface area, diameter equivalent to equal surface area, and side equivalent to equal surface area of a coke lump because the state of internal cracks could not be grasped and quantified.

The present invention has been made in view of the above, and provides a coke that is excellent in terms of reliability and precision by extremely easily and accurately measuring the total surface area, equal surface area equivalent diameter, and equal surface area equivalent side of a coke lump. A method for measuring the surface area of a lump is provided.

[Means to solve the problem]

The present invention is directed to transmitting an X-ray beam to a predetermined fault section of a plurality of fault sections continuously divided into a coke lump by a predetermined fault width, while irradiating the entire cross section of the fault section with an X-ray beam. scanning the X-ray beam along the tomographic section, continuously detecting the transmitted X-rays that have passed through the tomographic section, and obtaining a tomographic image of the cross section of the tomographic section based on the detection signal of the transmitted X-rays. a step of calculating a circumferential length of the tomographic section based on the tomographic image; a step of multiplying the circumferential length by the tomographic width to calculate an area of an exposed side surface of the tomographic section; a step of calculating the total surface area of the coke lump including the exposed surface of the crack in the coke lump based on the diameter of a sphere having a surface area equal to the total surface area of the coke lump or an equivalent surface area diameter corresponding to the length of one side of a cube; A method for measuring the surface area of a coke lump, comprising the step of calculating a side equivalent to an equal surface area.

[For production]

According to the method for measuring the surface area of a coke lump of the present invention, X-rays are irradiated onto a plurality of tomographic sections in which a coke lump is successively sectioned by a predetermined fault width, and transmitted X-rays are continuously detected. A tomographic image of a predetermined cross section of the tomographic section is obtained from the intensity distribution of transmitted X-rays. Next, based on the obtained tomographic image, the circumference length (hereinafter referred to as the total circumference length (A ) is calculated, and further, the total circumference length (A) is multiplied by the fault width to calculate the area of the exposed side surface of the fault. Based on this calculated value,
Calculate the total surface area of the entire coke lump. Further, based on the calculated value of the total surface area, a diameter equivalent to an equal surface area or a side equivalent to an equal surface area, which corresponds to the diameter of a sphere having the same surface area or the length of one side of a cube, is calculated.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

In this example, an X-ray computed tomography device (hereinafter referred to as
X-ray CT) was used. First, the coke lump is
Place it on the sample mounting table of line CT. Next, move the sample mounting table to
The coke lump is guided to the opening of a detection unit having a wire tube and a detector arranged opposite to the wire tube, and the imaging site of the coke lump is positioned at a predetermined position.

Next, an X-ray beam is irradiated from an X-ray tube toward the coke lump, and a detector detects the X-rays that have passed through the coke lump. In this state, the pair of X-ray tube and detector is rotated by a drive device provided in the detection section so as to scan the X-ray beam along a predetermined cross section of the coke lump. This scanning is controlled and performed by a calculation section, which will be described later.

In this way, the intensity of the detected transmitted X-rays is transmitted to the calculation unit connected to the detector. The arithmetic unit subjects this signal to image processing to obtain a predetermined tomographic image 3 of the coke lump, as shown in FIG. The tomographic image 3 is displayed on a display section connected to a calculation section. The displayed tomographic image 3 is further photographed with a multi-format camera.

In this way, the coke lump 1 is made into
The coke lump 1 is divided horizontally at 51 intervals (X), and tomographic images 3 are obtained for each cross section of 20 tomographic sections 2.

Next, analysis processing of each tomographic image 3 is performed in the calculation unit, and the inner circumference length (LL + + L
2 + L 3 + L 4 ), the outer circumference length (D) of the fault section 2, and the total circumference length (A-L+D) of the fault section.

The inner circumference length (L), outer circumference length (D), and total circumference length (A) of, for example, 20 fault sections 2 obtained in this way are
Shown in the table.

Table 1 Inner circumference length (L) Outer circumference length (D) Total circumference length (A) (c+n) (B)
(mark) 62.2 5
3.4 115.660.9. 5
4.8 115.759.9
51.8 111.758.6
50.0 108.657.0
47.0 104.058.5
45.9 104.4 Fault section position number Continuation of Table 1 1Iliil position number Inner circumference length (L)
Outer circumference length (D) Total circumference length (A) (cm
) (am)
(am)7 58.5
45.7 104.28
54.2 4Ei, 0 1
00.29 53.1
43.8 9B, 910
53.4 43.9 97
．． 311 52.1 44
．． 2 96.312 52.
1 42.2 94.31
3 50.8 41.3
92.11 4 50.4
40. ．． 8 91.215
38.1 40.1
78.116 37.8
40.0 77.817
38.3 38.9
75.218 35.1
37.3 72.419
34.2 3B, 0 70
．． 220 30.9 33
．． 7 64.8 The width of the fault section 20 (
The calculation section calculates the area of the exposed side surface of the tomographic section 2 by multiplying by the division interval X). Similarly, the inner circumference length (L) of the fault section 2,
Multiply the outer circumference length (D) by the division interval (X) to calculate the area of the white exposed side surface exposed to the crack 4 of the fault section 2 and the area of the outer exposed side surface exposed to the circumferential surface of the fault section 2, respectively. .

Next, the calculated values of the area of the exposed side surface of each of these tomographic sections 2 are integrated by the calculation section to calculate the foot surface area of the entire coke lump 1. Similarly, the area of the white exposed side surface and the outer exposed side surface of each fault section 2 is integrated to calculate the inner surface area and ductile surface area of the entire coke lump 1.

From the foot surface area of the coke lump 1 thus obtained, the diameter of a sphere having a surface area equal to this foot surface area, the diameter equivalent to an equal surface area (R1) corresponding to the length of one side of a cube, and the side equivalent to an equal surface area (R2) Determine.

For example, for five coke lumps 1-V, the surface area is
Inner surface area, ductile surface area, equivalent surface area diameter (R1),
When the equal surface area equivalent side (R2) was investigated, the results shown in Table 2 below were obtained.

Table 2 Coke I Foot surface area In-house surface! Ductile surface area Equal surface area equivalent diameter Equal surface area equivalent side (am 2 )
(am2)(am2)(R+)(cm
) (R2) (clll) I 935.5
497.1 438.4 17.3 12
．． 5II 445.9 248.6 197
．． 3 11.9 8.6]I[64G, 1
348.0 298.1 14.3
10.4IV 1312.6 720.8 59
1.8 20.4 14.8V 148
(), 8 845.1 R35,721,71,
5, 7 In this way, data such as the foot surface area of the coke lump 1 can be easily and accurately measured. Based on these data, drum strength (DI), particle size, reactivity, hot C
Characteristic values of coke such as strength after 02 reaction (C3R) can be accurately grasped. From these characteristic values of the coke lump, operational factors such as the heating pattern of the coke oven, cooling method, coal grade (MF), and carbonization temperature can be optimally controlled to improve the quality of the coke produced.

〔Effect of the invention〕

As explained above, according to the method for measuring the surface area of a coke lump of the present invention, the foot surface area, equivalent surface area equivalent diameter, and equal surface area equivalent side of a coke lump can be measured very easily and accurately. Furthermore, it has remarkable effects such as being able to control various operating conditions during coke production and use with high precision based on the characteristic value data of the coke lump.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing an example of a tomographic image of a tomographic part of a coke lump obtained in an example of the present invention, and FIG. 2 is an explanatory diagram showing a method of dividing a coke lump in the same example. 1... Coke lump, 2... Fault section, 3... Tomographic image, 4... Crack section. Applicant's agent Patent attorney Takehiko Suzue

Claims (1)

[Claims] While irradiating an X-ray beam so as to pass through a predetermined fault section among a plurality of fault sections that are continuously divided into a coke mass with a predetermined fault width, the A process of scanning a line beam, and a process of scanning a line beam, and transmitting X through the tomographic section.
a step of continuously detecting the line; a step of obtaining a tomographic image of a cross section of the tomographic section based on a detection signal of the transmitted X-ray; and a step of calculating a circumferential length of the tomographic section based on the tomographic image. and calculating the area of the exposed side surface of the fault by multiplying the perimeter length by the fault width; and calculating the total surface area of the coke lump including the exposed surface of the crack of the coke lump based on the area. and a step of calculating an equal surface area equivalent diameter or equal surface area equivalent side corresponding to the diameter of a sphere having a surface area equal to the total surface area of the coke lump or the length of one side of a cube. How to measure surface area.