Coking process

Claim 1

IN A PROCESS OF PREPARING A METALLURGICAL COKE BLEND FROM A MARGINAL COKING COAL THE IMPROVEMENT WHICH COMPRISES; CRUSHING A MARGINAL COKING COAL CONTAINING IN EXCESS OF 12% BY WEIGHT VOLATILE MATTER AND HAVING A PLURALITY OF DISTINCT PETROGRAPHIC LAYERS WITH AT LEAST ONE LAYER COMPRISED OF A COKING COAL COMPONENT SELECTED FROM THE GROUP CONSISTING OF VITRAIN AND CLARAIN, AND AT LEAST ONE OTHER LAYER COMPRISED OF A NON-COKING COAL COMPONENT SELECTED FROM THE GROUP CONSISTING OF DURAIN, FUSAIN, SLATE, AND SHALE TO SEPARATE THE SAID LAYERS AND PRODUCE A MAJOR JPROPORTION OF FRAGMENTS HAVING A PARTICLE SIZE BETWEEN ABOUT 2 INCHES AND ABOUT 3/8 INCH WITH A MINIMUM AMOUNT OF FINELY DIVIDED VITRAIN AND CLARAIN COAL COMPONENTS, SUBJECTING THE FRAGMENTED COAL CONTAINING SAID COLING AND SAID NON-COKING COAL COMPONENTS IN SUBSTANTIALLY THEIR ORIGINAL PROPORTION TO A FIRST LIQUID DENSITY SEPARATION TRATMENT WHEREIN THE LIQUID HAS A SPECIFIC GRAVITY BETWEEN ABOUT 1.20 AND 1.30 TO SEPARATE THE SAID FRAGMENTED COAL INTO A PORTION WHICH FLOATS AND A PORTION WHICH SINKS THEREIN, CRUSHING THE PORTION OF SAID FRAGMENTED COAL WHICH FLOATS IN SAID FIRST DENSITY SEPARATION TREATMENT TO A PARTICLE SIZE WHICH PASSES THROUGH THE 6 MESH SCREEN BUT LARGER THAN 20 MESH, SUBJECTING THE PORTION OF SAID FRAGMENTED COAL WHICH SINKS IN SAID LIQUID DENSITY SEPARATION TREATMENT TO A SECOND LIQUID DENSITY SEPARATION TRATMENT WHEREIN THE LIQUID HAS A SPECIFIC GRAVITY OF ABOUT 1.35 TO 1.45, CRUSHING THE MATERIAL WHICH FLOATES IN SAID SECOND LIQUID DENSITY SEPARATION TREATMENT UNTIL ALL SAID MATERIAL PASSES THROUGH A 20 KMESH SCREEN, AND COMBINING SAID CRUSHED PORTIONS OF SAID FRAGMENTED COAL WHICH FLOAT IN THE SAID FIRST AND SECOND DENSITY SEPARATION TREATMENTS IN A COKING BLEND SUITABLE FOR USE IN THE PRODUCTION OF METALLURGICAL COKE.