Abstract: A method and apparatus for controlling the thickness of a metal strip cast by pouring molten metal between a pair of closely spaced, water-cooled rotating rolls. The temperature of at least one of the rolls is measured at a fixed position relative to the roll bite before and during the cast. The rotational speed of the rolls is adjusted in proportion to a measured roll separation or roll separating force corrected by the roll temperature measured during the cast such that a predetermined and substantially uniform thickness of the metal strip is produced.

Abstract: A method for increasing the wet bulk density of coking coal charges for code ovens which charges contain at least about 6 and as much as 13 weight percent moisture, to an optimum level of between about 47 and 50 pounds per cubic foot (753 to 801 kg per cubic meter) and for controlling and maintaining the bulk density at such optimum levels, the method including:(a) forming a 5 to 20 weight percent aqueous dispersion of a surfactant having a desired viscosity, and(b) applying a quantity of the aqueous dispersion to a quantity of coal equivalent to between about 0.5 and 2.5 pounds (0.227 and 1.135 kg) of surfactant per ton (907.2 kg) of coal,the surfactant being an alkylphenoxypoly (ethyleneoxy) ethanol having a general formula: ##STR1## where R is an alkyl group having between about 8 and 12 carbon atoms, andn is an integer between 2 and 30,and is characterized by an HLB number in the range of about 4 and 18.