Research Of Operation Of Coal And Gangue With Large Size Automatic Sorting Based On X-ray

The problem of development and utilization of coal resources is separation of coal and gangue.The requirements of green environmental of coal impact as small as possible.The heavy medium cyclone coal washing is very popular for smaller particle size(<50mm).The flotation can be used to treat the fine coal(<0.045mm),There are many traditional ways of coal preparation in coal preparation plant now.This link is very important.Before the coal and gangue separation,it will be the removal of large gangue,greatly reducing the ash content of selected raw coal,saving the energy consumption of crushing and sorting process,increasing the efficiency of productionThis paper through the analysis of the coal sample from Huaibei Yangzhuang Coal.Firstly,the cylinder samples are made in the bulk coal and gangue.The use of stone cutting machine on the cylinder sample height processing,so that the height of each sample is different.The processed samples are further processed into a regular cylinder using a grinding machine.The height of each sample is as high as possible in accordance with the "3,4,5,6,7,8,9,10".After completion of sample preparation,X ray detector was used to detect the samples.These images are converted to grayscale images.The normalized gray histogram is analyzed.In the software environment of matlab to write a number of functions to calculate a characteristic value to represent a particular sample in a certain voltage and current conditions of the detector generated images.Based on the analysis of the use of X ray detection in the identification process.For the dispersal mechanism of material and automatic discharging mechanism were studied.The open-loop and feedback control laws are applied.For the hardware organization to do a certain assumption.Through the combination of PLC sensors and actuators,these ideas are initially improved.The selection and ladder diagram program are wrote in PLC.