Study on the application of secondary flotation process combined with flotation machine and flotation column in Huipodi Coal Preparation Plant
With the increase of the content of high-ash fine slime in coal and the ash content of tailings,the problem of heavy medium clean coal bearing more stringent ash requirements caused by the high ash content of flotation clean coal has become increasingly prominent,which seriously affects the economic benefits of enterprises.In order to solve the above problems,Huipodi Coal Preparation Plant has carried out the secondary flotation process transformation combined with flotation machine and cyclone microbubble flotation column.Based on the properties of coal slime in Huipodi Coal Preparation Plant,this paper discussed the feasibility of obtaining qualified clean coal(ash content less than 9.50% )and high ash tailings(ash content higher than 75% )by primary flotation of flotation machine,compared the secondary flotation effect on industrial clean coal of laboratory flotation machine and flotation column,and analyzed the flotation production indexes before and after industrial transformation.The results showed that it was impossible to obtain qualified clean coal and high ash tailings at the same time through primary flotation by using the flotation feed of Huipodi Coal Preparation Plant.In the secondary flotation tests,under the premise of the same dosage of flotation reagent and the same ash content of flotation clean coal,the yield of clean coal obtained by flotation column was 2.73% higher than that of flotation machine,and the ash content of tailings was 11.53% higher than that of flotation machine.Compared with that before the transformation,after the completion of the secondary flotation process transformation,the ash content of flotation concentrate was stabilized below 9.50%,which solved the problem of heavy medium concentrate,and the ash content of flotation tailings was stabilized above 75%,which met the requirements of direct abandonment.The comprehensive clean coal yield was increased by 0.52%,about 14,500 tons of flotation clean coal can be recovered every year,and 43,300 tons of middlings can be recovered.
high ash fine slimeprimary flotationsecondary flotationflotation column
万方数据
维普
