Stickiness of Retorting Oil Shales on Stainless Steel

摘要

The stickiness of oil-shale particles was measured as the angle of tilt required to cause a thin layer of 6.4-mm particles to slide from rest on a stainless-steel surface. The test tray was enclosed in a heating chamber within an electric furnace and was heated through the retorting temperature range, 350 to 450 exp 0 C, in an argon atmosphere at a rate of about 4 exp 0 C/min. We tested three grades of raw shale: 20, 93, and 197 L/Mg; also tested were blends of one part of each of the two richer shales with 3.5 parts of previously burnt shale. Surprisingly, we found that the mean 50% slide angle decreased with increasing grade, the values being 27.7, 21.7, and 20.4 deg, respectively, for the raw shales. The trend was the same, but less steep, for the shales diluted with burnt shale. (ERA citation 08:009177)