A method and special equipment for identifying coal and gangue

Abstract

The invention relates to a method and special equipment for identifying coal and coal gangues, which are used for online identifying and sorting the coal and the coal gangues according to difference of resistances (insulativity). The invention belongs to the technical field of coal mine production and machining. The technical scheme is as follows: massive materials of the coal and the coal gangues on a conductive conveying device are sequentially queued and reserved with gaps after passing through a queuing mechanism (2), and sequentially contact with a flexible electrode while passing through a space below the flexible electrode (5), and the arrangement is equivalent to that a resistor is serially connected in a circuit in sequence; and whether coal briquettes or the coal gangues contact with the flexible electrode is identified according to whether a current passes or not during contact between the flexible electrode and the coal or according to the level difference of the passing currents. The method and the special equipment, which are disclosed by the invention, have the positive results of being high in identification accuracy, simple and practical, low in fault rate, uninfluenced by the sizes of material particles, capable of replacing a manual manner or other manners to identify and sort the coal and the coal gangues, harmless to people and environment, and specially suitable for working environments of coal mines, coal yards and the like.

Description

technical field [0001] The invention relates to a method and special equipment for identifying coal and gangue. The coal and gangue are identified and sorted online according to the difference in electrical resistance (insulation), and belong 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 bad, and the efficiency is low; 2. The image recognition method is based on the color grayscale of co...

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 bad, and the efficiency is low; 2. The image recognition method is based on the color grayscale of coal and coal gangue. The existing problem is that it is difficult to identify black coal gangue similar to coal; 3. Gamma The problem with the horse-ray identification method 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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