CURRENT RESEARCH
Development of a Centrifuge for Source Sampling to Determine Particle Size Distribution Paul L. Anderson Kaiser Aluminum & Chemical Corp., Center for Technology, P.O. Box 870, Pleasanton, Calif. 94566
A small centrifuge source-aerosol sampler has been designed and constructed. Spectral calibrations include the particle range from 3-0.16 pm. The design includes multiorifice cascade impactor plates ahead of the centrifuge to process coarser particulate. The centrifuge is thermally protected and small enough to be used in-stack in some applications. The centrifuge is a high resolution instrument that collects particles individually, passively, and in a manner remarkably amenable to electron microscopy and microanalytical techniques. A sampling experience is described in which source-aerosols before and after a fluid bed reactor-baghouse dry scrubber, on an experimental aluminum reduction cell, are compared. I t was found that (1) the fluid alumina bed is an efficient collector of fine “fume particles” as well as HF, and (2) it was not the finest fines (
