Use of char to improve physical quality of doke from Sunnyside (Utah) coal.
Boley-CC; Fegley-MM; Porter-RB
Grand Forks, ND: U.S. Department of the Interior, Bureau of Mines, RI 7817, 1973 Jan; :1-30
Using bench- and pilot-scale coking facilities, the Bureau of Mines produced experimental coke from blends of char with Sunnyside Coal (high-volatile a bituminous) from Carbon County, Utah. At bench scale, additions of char made from lignite improved resultant cokes when concentrations of up to 60 percent were used in the blends. At pilot scale (500-pound movable-wall oven), four chars made by entrained-bed carbonization techniques from the parent Sunnyside coal and from a North Dakota lignite were used in two-component blends with the Sunnyside coal. Chars from Sunnyside coal had volatile matter contents of 5.8, 9.8, and 16.0 percent, moisture-free basis; the char from the lignite had 16.6 percent. In 25 500- pound tests, improvement in coke quality was observed from all blends at char concentrations to 17.5 percent. The best coke, produced from a concentration of 12.5 to 15 percent of 5.8-percent volatile char, exhibited physical properties approaching those of an industrial coke produced from Sunnyside coal blended with three higher rank blending coals. Studies were also made of the effects on coke quality of char source, of particle size, of comparative use of char and of a blending coal, and of prolonged coal storage.
Mineral-processing; Mining-industry; Coal-processing; Coal-products
IH; Report of Investigations
NTIS Accession No.
Grand Forks, ND: U.S. Department of the Interior, Bureau of Mines, RI 7817