煤和矸石的气射式试验

Air-blowing experiment of coal and gangue

利用气射式分选装置,采用正交试验的方法研究输送带速度、喷气压力和分选次数对混矸率和分矸率的影响,并对试验结果进行了回归和方差分析。分析结果表明,混矸率随带速增加而增大,随喷气压力和分选次数增加而减小;分矸率随带速增加而减小,随喷气压力和分选次数增加而增大;3个因素对分矸率和混矸率的影响显著,且主次顺序为带速、分选次数和喷气压力。

The influence of belt speed, air pressure and selection number on the rate of mixed gangue and rate of separated gangue was researched by orthogonal experiment method and using separation device with air-blowing method, and the experiment results were analyzed by regression and variance analysis. The analysis results show that the rate of mixed gangue increases with belt speed and decreases with the increase of air pressure and number of selection; rate of separated gangue decreases with the increase o{ belt speed and increases with the increase of air pressure and number of separation. The belt speed, air pressure and number of separation have a great effect on rate of mixed gangue and rate of separated gangue, the order is belt speed, number of separation and air pressure.