Method for evaluating washability in coal separation process according to image recognition method

An image recognition, optional technology, applied in the direction of character and pattern recognition, instruments, computer parts, etc.

Inactive Publication Date: 2018-12-04
HENAN POLYTECHNIC UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to provide a method to solve the problem that the evaluation method of coal sorting selectivity is not clear in the sorting process of image difference, which makes it difficult to control the products in production and limits the industrial...

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  • Method for evaluating washability in coal separation process according to image recognition method
  • Method for evaluating washability in coal separation process according to image recognition method
  • Method for evaluating washability in coal separation process according to image recognition method

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with embodiment (accompanying drawing):

[0027] The selectivity evaluation method in the image recognition method coal preparation process of the present invention comprises the following steps:

[0028] a. Raw coal sample collection: sampling volume ≥ 10 tons, sampling time ≥ 8 hours, and sub-samples ≥ 30; the sampling location is on the underground raw coal belt or the lower belt of the raw coal bunker, and the sampling should be representative;

[0029] b. Raw coal total sample analysis, including elemental analysis, industrial analysis, coal ash composition analysis, and physical property analysis; elemental analysis includes carbon, hydrogen, oxygen, nitrogen, sulfur, phosphorus element content (mass %); industrial analysis includes total moisture (mass %), as received basis ash (mass %), as received basis volatile matter (mass %), as received basis and dry basis low calorific value (MJ / kg); coal...

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Abstract

The invention relates to a method for evaluating the washability in the coal separation process according to an image recognition method. In the method, raw coal separation is realized according to the grayscale and texture structure difference by using an image recognition technology. The washability evaluating method comprises the steps of raw coal sampling, raw coal gross sample analysis, raw coal particle size analysis, raw coal image analysis, washability curve drawing and washability evaluation, wherein the sampling of raw coal samples should be representative; the raw coal gross sampleanalysis includes element analysis, industrial analysis, coal ash component analysis and physical property analysis; screening is performed according to 200mm, 150mm, 100mm, 50mm, 25mm, 13mm, 6mm and0.5mm, and test samples are taken from each particle size of the screened coal samples for industrial analysis and element analysis; the coal samples with the particle size being 6mm and above are respectively sampled for image feature extraction, and the image recognized coal samples are sampled again for industrial analysis and element analysis; and a screening-image feature washability curve for the particle size of 6mm and above is drawn.

Description

technical field [0001] The invention belongs to the technical field of coal sorting technology, and relates to a coal image sorting method and an evaluation method. technical background [0002] Coal "washing" is currently the most important method of coal preparation, but as the country's coal resource development center shifts to the west and north inland, the disadvantages of the "coal washing" method are further highlighted. Mainly reflected in: firstly, a large amount of coal slime water produced in the coal washing process needs to be recycled, the process is complicated, and the workload is heavy; secondly, the west and north of my country are short of water and the ecology is fragile. The "coal washing" method greatly limits the development of coal utilization . In recent years, some new sorting methods have been widely developed, especially the dry sorting without water has attracted the attention of the industry, and the method of sorting based on the difference in...

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Application Information

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IPC IPC(8): G06K9/62G06K9/46
CPCG06V10/40G06F18/241
Inventor 邓小伟赵运基史长亮聂彦合赵继芬张传祥叶广课王勋龙
Owner HENAN POLYTECHNIC UNIV
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