Numerical simulation of spatial dust concentration distribution regularities in crushing chamber
Abstract：In order to master the regularities of spatial dust concentration distribution in crushing chamber and obtain rational parameters for the design of dust removal by ventilation, taking No. 27 crushing chamber of ascension work- shops system in Xishimen Iron Mine as the research background, based on the theory of gas-solid two-phase flow, using the discrete phase model of computational fluid mechanics to simulate the dust concentration in crushing chamber. By contrast with field measurement of dust concentration distribution, simulating results were essentially coincident with measured data. The results indicate that the area nearby the crusher and feeder in crushing chamber have high dust concentration, and the value can gradually decrease radially taking the crusher and feeder as the center. Dust concen- tration in chamber under trap wall condition is smaller than the reflect. When 27/40 inclined roadway as the air inlet with the velocity in 1 m/s, the effect of dust setting is better. Meanwhile, the dust-removal efficiency can reach 90% when the system of dust removal by air exhaust was installed, and the dust concentration can keep in 2 mg/m3.
Keywords：crushing chamberspatial dust concentrationgas-solid two-phase flowdiscrete phase modeldust removal by ventilation
Publication Date：2012-01-01
Online Publishing Date：2025-08-15(First online date of this platform, not the publication date of the document)
Pages：6( 1865-1870 )