Physical Desulfurization of Fine-Size Coals on a Spiral Concentrator.

摘要

This Bureau of Mines study was conducted to determine the sulfur reduction potential attainable when washing fine-size coal on a spiral concentrator. Crushed samples of Middle Kittanning and Bakerstown bed coals washed on the spiral provided pyritic sulfur reductions of up to 90percent for the plus 200-mesh material. Pyritic sulfur reductions on the minus 200-mesh material seldom exceeded 30percent;consequently,this material would require further treatment. The capacity of the spiral was 2 tph per unit when washing 14-mesh by 0coal. The ability to remove pyrite combined with the higher-than-expected capacity makes the spiral worthy of consideration as a rougher-cleaner in new fine-coal desulfurization circuits. (ERA citation 02:015651)