Research On Parameters Optimization Of Vibrated Spiral Dry Separation

Vibrated spiral dry separator is a new dry coal preparation equipment which learn from the experience of dustpan sieving grain. The equipment in the phase of parameters optimization research now, But because of some structure parameters are difficult to change and the lack of analysis make research face the problem of directional. This paper is based on using the simulation software of EDEM carry out simulation experiment, by introducing grey theory and BP neural network to analyze the simulation results, to help the parameters optimization of vibrated spiral dry separator.Firstly, the dynamic model of vibrated spiral dry separator is established in this thesis. The calculation formula and influential factors of vertical amplitude and torsional amplitude is put forward respectively, which provide a theoretical support for subsequent simulation experiment. Then 3D model of vibrated spiral dry separator is built by using a kind of 3D modeling software named Solid Works. Finally, multifactor simulation experiment is finished by EDEM.The single factor simulation experiment of sorting laps is done, get the maximum of the Qc of clean coal when the value of sorting lap is four. The correlation analysis of five main influence factors of separation effect is done by introducing Grey Relation Theory in the paper, get the order of the influence of various factors on the separation index is frequency, screw pitch, torsional amplitude, vertical amplitude, radial Angle; through Gray Model Theory initially establish gray prediction model of experience between the factors and separation index.The main parameters are optimized by building and training the BP neural network and using optimization function, get the maximum of the Qc of clean coal is 73.66%,corresponding frequency is 34.7042 HZ, screw pitch is 341.3642 mm, vertical amplitude is 1.8568 mm, torsional amplitude is 0.1486°, radial Angle is 1.2356°.The influence of various factors on the separation index is mastered preliminarily by the research. This paper not only enriched and developed dry coal preparation technology, but also established the foundation for continuing study to the equipment.