彭庄选煤厂高灰细煤泥浮选提质可行性研究OA

In view of the difficult technical problems of low sorting efficiency of fine coal slime and excessive ash content of clean coal in coal preparation plants,taking the fine coal slime fed by flotation in Pengzhuang Coal Preparation Plant as the research object,through the analysis of particle size composition and density characteristics,and combining stepwise release tests and unit flotation tests,the optimal flotation process flow and reagent system are determined.The research shows that high ash fine mud entrainment is the core reason for the low flotation efficiency of fine coal slime;Adopting the"one coarse,one fine"process and introducing the forced dispersion and size mixing technology,the high ash fine mud on the surface of coal particles is removed by forced dispersion and size mixing,which can significantly suppress the fine slime entrainment effect.On the basis of using 1200 g/t of reagents in original manufacturer and combined with the treatment of forced dispersion and size mixing,high-quality clean coal with an ash content of 8.56%and a yield of 50.49%can be obtained.Compared with the current situation where the ash content of clean coal exceeds 10%in the original process,the problems of low flotation efficiency of fine coal slime and unqualified clean coal products are effectively solved,providing a technical reference for optimizing the fine coal slime sorting process of similar coal preparation plants.