CHINA MINE ENGINEERING

This article summarizes the research process of composite flow resistance in slurry pipelines. Based on the research results of Durand, Ismail, Vasp and others, and according to the relative volume concentration CCA=C1VCV of slurry, the concept of boundary particle size between coarse and fine particles is proposed, and the formula for composite flow resistance in slurry pipelines is derived. This formula has a clear mathematical and physical concept, rigorous derivation, and simple calculation method, which can be used as a reference for slurry pipeline engineering design.