Automatic sample grinding apparatus and automatic sample grinding method of coal rock polished section

Abstract

The invention relates to an automatic sample grinding apparatus and an automatic sample grinding method of coal rock polished section. The automatic sample grinding apparatus comprises a sample grinding machine, a water spraying pipe, a polishing liquid pipe, a fine grinding sand disk, a precise grinding sand disk, a fixing rod, a position limiting block, a sample tank, a bracket, a pressurizationrod, a pressure drive system and an automatic control device. According to the method, after a pressure value and a sample grinding time are set, a coal rock polished section is placed into the sample tank and contacts the fine grinding sand disk; the automatic control device is started; the pressure drive system is started after fine grinding and spraying are performed for 3 s; the pressure is applied on the coal rock polished section through the pressurization rod and the fixing rod, and a polishing liquid is automatically sprayed every 15 s; the fine grinding sand disk is stopped after thesample grinding time is achieved, and the spraying is stopped after 5 s; the fixing rod is rotatablely placed on the precise grinding sand disk, the precise grinding sand disk is started, and precisegrinding operation is performed; and after the precise grinding, the coal rock polished section is polished for 1-2 min on a polishing cloth. With the apparatus and the method of the present invention, the sample preparation time can be shortened, the material consumption can be reduced, the surface of the sample can be flat, wear-mark-free and clear, and the microscopic recognizability rate of the sample can be increased.

Description

technical field [0001] The invention belongs to the field of coal coking, and in particular relates to a preparation device and a preparation method of coal rock light slices which can improve the measurement accuracy of coal rock microcomponents. Background technique [0002] The scope of application of coal petrology is more and more extensive. In the coking industry, the detection index of coal petrology has been taken as the main detection index. Under the current complex coking coal supply market, coal-rock detection can effectively identify the mixed coal quality of incoming coal and play a role in controlling the quality of incoming coal; at the same time, coal-rock blending technology can effectively reduce the cost of coal blending and coking, It has been widely used in various enterprises. [0003] In the process of scientific research, industrial experiment and industrial production application of coal-rock coal blending technology, the indispensable link is to m...

AI Technical Summary

Problems solved by technology

For coal with low degree of metamorphism, due to its low hardness and easy grinding, if the applied grinding pressure is too large, the grinding marks will be deep and the amount of wear will be too large when grinding on water sandpaper, so that in the subsequent Fine grinding and polishing processes cannot eliminate deep grinding marks, which affects the identification and determination of coal rock microcomponents under the microscope

For coal with a higher degree of metamorphism, due to its greater hardness and difficulty in grinding, if the same pressure is applied and the grinding time is the same, the sample will not be ground flat, which will cause problems in the identification and analysis of coal rock microcomponents. It is difficult to focus during measurement, which affects the identification and detection of samples

In addition, this technology involves a complete set of devices, and the existing sample grinding device needs to be replaced as a whole, which is costly and causes a waste of resources

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