Feasibility study on flotation in Huaheng coal preparation plant

To resolve the problems such as single coal separation method and low slime recovery in Huaheng coal preparation plant,test the flotability through screen analysis,standard substep release test and flotation test. The results indicate that the proportion of + 0. 5 mm particles in the slime is only 0. 18%,which is suitable for the flotation conditions,the content of-0. 25 mm particles is 99. 23%,which meets the requirement of particle size in the flotation. The optimized reagent schedule is that the ratio of light diesel and GF is 9∶ 1,the dosage of mixed reagents is 1000 g /t,while the productive rate of the clean coal is 46. 28%,the clean coal ash is 11. 76%,the recovery of combustible materials is 73. 99%. So the flotation is suitable for the separation of the slime. According to the practical situations of the coal preparation plant,the necessity of the slime flotation is analyzed,and the economic benefits has been estimated,the program of slime flotation system is feasible in the construction space and processing layout. The blend of clean coal of the slime flotation and the washing clean coal can hold the moisture of clean coal,decrease the overstock of coal slime,relieve the operating pressure and increase the sales revenue by 1. 5309 × 107 yuan per year.