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

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...

AI Technical Summary

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 industrialization development of dry coal preparation by image method. An optional evaluation method in the coal preparation process of image recognition method to solve the technical problems of dry separation of lump coal image recognition and provide a basis for the regulation of separation products

Images