. Bulletin. c gravity of coke 78 Real specific gravity of coke 1. 62 Porosity, per cent 49. 6 (NH4)JS04 per ton, from laboratory test, pounds 27 Tar per ton, gallons 6 Gas per ton, cubic feet 9,700 Analysis of coal and coke, test 5. Coal. Coke. Moisture, per cent 8. 45 11. 40 Volatile matter, per cent 35. 21 1. 81 Fixed carbon, per cent 54. 30 84. 25 Ash, per cent 10. 49 13. 94 Sulphur, per cent .82 Phosphorus, per cent 011 . 013 TEST G. In test 6, washed slack from Franklin County, district 6, seam 6,was used. The coal was crushed so that 72 per cent passed throughJ-inch openings and 84
. Bulletin. c gravity of coke 78 Real specific gravity of coke 1. 62 Porosity, per cent 49. 6 (NH4)JS04 per ton, from laboratory test, pounds 27 Tar per ton, gallons 6 Gas per ton, cubic feet 9,700 Analysis of coal and coke, test 5. Coal. Coke. Moisture, per cent 8. 45 11. 40 Volatile matter, per cent 35. 21 1. 81 Fixed carbon, per cent 54. 30 84. 25 Ash, per cent 10. 49 13. 94 Sulphur, per cent .82 Phosphorus, per cent 011 . 013 TEST G. In test 6, washed slack from Franklin County, district 6, seam 6,was used. The coal was crushed so that 72 per cent passed throughJ-inch openings and 84 per cent through |-inch openings. One ovencharge was made of Illinois coal alone, and box tests were made ofmixtures of 90 per cent Illinois coal and 10 per cent low-volatile coal,80 per cent Illinois coal and 20 per cent low-volatile coal, 70 per centcent Illinois coal and 30 per cent low-volatile coal, and 60 per centIllinois coal and 40 per cent low-volatile coal. The coking time ineach case was 16 RESULTS OF COKING TESTS. 43 The coke from the oven charge was fingerlike and brittle, withfew cross checks. The coke from the box tests was more blocky, withirregular cell structure. Analysis of coals wed in test 6. Low- Illinois volatilecoal. coal. Moisture, per cent Volatile matter, per cent Fixed carbon, per cent Ash, percent Sulphur, per cent .76 Analysis of coke, test 6. Constituent. 90 per cent 80 per cent 70 per cent Illinois Illinois Illinois Illinois coal and 10 coal and 20 coal and 30 coal only. per cent percent per cent low-vola- low vola- low vola- tile coal. tile coal. tile coal. 88 01 .86 .93 60 per cent Illinoiscoal and 40percentlow vola-tile coal. Volatile matter, per centFixed carbon, per Ash, percent Sulphur, per cent .90 TEST 7. Coal from Williamson County, district 6, seam 6, was used in test charges were m
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