Research On Resistance Calculation Method Of Dense Pastes During Pipeline Transportation

Pipeline transportation technology of dense pastes is a new research field. The friction resistance loss is one of key parameters. This paper regards establishing a dense paste pipeline resistance calculation model as the goal, firstly the research material category is defined through the test of paste physical characteristic parameters; On the basis of studying the friction resistance loss mechanism, we summarize the main fectors that influence the paste resistance characteristics; The relationship forms between the flow rate, diameter, volume concentration, transport distance and resistance loss are obtained though the transportation test taking coal slime as example on the hydraulic-control pipe rheological and resistance test facility. By the orthogonal tests, the order of the key factors is obtained according to the degree to which they could affect the unit length pipeline friction resistance loss of paste through the analysis of variance; On that basis we get the relationship form of adsorption resistance coefficient and viscosity resistance coefficient between volume concentration and derive the resistance calculation formula; The test study of the straight pipe and local fittings pressure loss is carried out on(?)200mm circular pipeline system, which proves the validity of calculation formula. Lastly the test method is concluded that the friction resistance loss in practical engineering can be predicted though a small number of tests.