STP946: The Relative Erosivity of Coal-Oil, Coal-Water, and Petroleum Coke-Oil Slurries

    Lee, Y-H
    Graduate student and associate professor, University of Kansas, Lawrence, KS

    Clark, HM
    Graduate student and associate professor, University of Kansas, Lawrence, KS

    Pages: 15    Published: Jan 1987


    Abstract

    The relative erosivity (defined as the ratio of the rate of mass loss from a target specimen tested in one slurry and the rate of mass loss in another slurry) for coal-water, coal-oil, and petroleum coke-oil slurries has been determined using pot testers with a rotating flat-plate specimen of either mild steel or 304 stainless steel with a tip speed of 18.3 m/s. Pittsburgh No. 8 seam coal and Whiting medium sulfur coke, both ground to passing 200 mesh, were used together with high flash distillate fuel oil. Slurry viscosity was measured before and after testing, and surface damage was examined using the scanning electron microscope. The effects of slurry concentration (solids loading), velocity, and target material were noted. Evidence of erosion-corrosion was observed for slurries with added stabilizers and for water-based slurries. The erosivity increased in the order coke-oil, coal-oil, coal-water and with increasing solids loading up to about 50% after which a decrease was observed. Comments on problems of erosivity measurement using pot testers are included.

    Keywords:

    erosion, coke, petroleum coke, coal, slurry, erosivity, pot tester, erosion-corrosion, mild steel, stainless steel, velocity, concentration, slurry stability


    Paper ID: STP19415S

    Committee/Subcommittee: G02.10

    DOI: 10.1520/STP19415S


    CrossRef ASTM International is a member of CrossRef.