A method and special equipment for identifying coal and coal gangue based on temperature

Abstract

The invention relates to a temperature-based method for identifying coal and coal gangue and specific equipment, and belongs to the technical field of coal mine production and processing. According to the technical scheme, the method comprises the following steps: detecting the temperature difference before and after heating coal and coal gangue by a temperature detection device, and determining the material to be coal when the temperature difference before and after heating is more than a set threshold value, and determining the material to be coal gangue when the temperature difference before and after heating is less than the preset threshold value; and detecting coal or coal gangue by a distance measurement device (6) since the distance from the upper surface and an infrared heat device (3) is different due to different grain sizes, and correcting the identified threshold value. The method is simple and practical, has the positive effects of high identification accuracy and low failure rate, is not influenced by the grain size of a material, can be used for identifying and separating coal and coal gangue instead of manual or other modes, is not harmful to people and environment, and is especially suitable for coal mine, coal yard and other working environments.

Description

technical field [0001] The invention relates to a method and special equipment for identifying coal and gangue based on temperature. According to the difference in infrared absorption rate and internal thermal conductivity (thermal resistance) of the surface of coal and gangue, coal and gangue are identified and sorted online. It belongs to the technical field of coal mine production and processing. Background technique [0002] Coal gangue is an accompanying substance in the process of coal production and processing. It has low calorific value and many harmful substances, which seriously affects product quality. It needs to be identified and sorted in time. Coal and gangue with smaller particle size can be removed by medium coal washing or winnowing. For lumpy coal and gangue, the identification methods of the background technology mainly include the following: 1. Manual classification The existing problem is that the labor intensity is high, the working environment is har...

AI Technical Summary

Problems solved by technology

Coal and gangue with smaller particle size can be removed by medium coal washing or winnowing. For lumpy coal and gangue, the identification methods of the background technology mainly include the following: 1. Manual classification The existing problem is that the labor intensity is high, the working environment is harsh, and the efficiency is low; 2. The image recognition method; the identification is carried out according to the color grayscale of coal and coal gangue, and the existing problem is that it is difficult to identify black coal gangue similar to coal; 3. Gamma Horse ray identification method; the problem is that it is difficult to identify coal gangue with a thickness of more than 100mm. In addition, gamma rays are potentially harmful to the human body and the environment

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