Through slime test, particle size analysis, and mineral composition of coal slime in the Panji Coal Preparation Plant, the causes of water settlement of coal slime are analyzed, and the effects of coagulant type, coagulant dosage, and flocculant dosage on water settlement are studied by orthogonal test. The test results show that the high ash raw coal in the Panji Coal Preparation Plant presents high slime, the slime size is fine, and the slime contains a lot of fine particles such as kaolinite and quartz, which makes the slime difficult to settle by water. In the range analysis, the above clear liquid's tur-bidity was the investigation index, and the optimal settlement condition was A1B1C1. Taking the settling velocity as the in-dex, the primary and secondary optimal settling condition is A3B3C3. According to variance analysis, the influence on the tur-bidity of supernatant is as follows: coagulant type >coagulant dosage > flocculant dosage, and the influence on settling ve-locity is as follows: coagulant type > flocculant dosage > coagulant dosage.
关键词
泥化/煤泥水沉降/正交试验/极差/方差
Key words
mudification/slime water settling/orthogonal test/range value/variance value
维普
万方数据