Device for measuring internal structure of coke and measuring method thereof

Abstract

The invention provides a device for measuring an internal structure of coke and a measuring method thereof; the device comprises a microscope and a computer; the computer is used for controlling rotation of a polarizer of the microscope and front, rear, left, right, upper and lower three-dimensional moving of an object stage. The measuring method comprises the following steps: pretreating a to-be-tested sample for standby application; establishing the relationship between pixel values of a digital image of a substance and the reflectivity; shooting digital images for analysis of sample bireflectivity and optical anisotropic indexes; determining an effective point classification statistical rule; and analyzing an optical structure of the coke by the statistical rule. The device and the method have the advantages that compared with an image analysis method purely relying on gray and shape characteristics, the method adopts three parameters of the maximum reflectivity, the bireflectivity and the optical anisotropic indexes for identification and analysis of the optical structure, and the measured results are more accurate and more reliable; and the whole analysis process is fully automatic, and the method is a fast and efficient analysis method.

Description

technical field [0001] The invention relates to a device for measuring the internal structure of coke and a measuring method thereof, belonging to the technical field of iron and steel metallurgy. Background technique [0002] Coke is a porous body composed of pores, pore walls and microcracks. The pore wall of coke is mainly composed of carbonaceous materials. The form of carbon in coke is between amorphous carbon and graphitic carbon. Under the reflective polarizing microscope, it can be observed that the pore wall of coke has different structures and shapes, and the size of the area is different. Composed of color units, these isochromatic units are called optical microscopic components of coke. The optical structure of coke is not only related to the characteristics of the raw coal used in coking, but also reflects some changes in the coking process. At the same time, there is also a close relationship between the optical structure of coke and the macroscopic propertie...

AI Technical Summary

Problems solved by technology

[0006] All techniques that simply use image analysis to measure the optical structure of coke have a common problem: use natural light instead of polarized light for irradiation, or even measure under polarized light, but the vibration direction of the polarized light during the measurement process is different from that of polarized light. The angle between the objects to be measured remains fixed

[0009] According to the public literature (PEARSON D E, PEARSON R A. Bi-Reflectance Mapping and Automated Petrographic Analysis of Metallurgical Coke [C]. AISTech 2012, Atlanta, 2012: 247-251.), although the latter analysis method solves the problem of changes in the measurement process The problem of the angle of polarized light has realized the automatic identification and analysis of optical microstructure, but the fly in the ointment is that only the maximum reflectance and double reflectivity are used as the basis for the identification and distinction of microscopic optical structures. During actual use, it is found that There are still misjudgments, which affect the accuracy of the analysis results

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