Abstract: A striker bar for a rotary cage grinder in which the impact-receiving portions of the bar are of an abrasion resistant ceramic, such as aluminum oxide, silicon carbide, or tungsten carbide. The bar includes a block of the ceramic, preferably formed in sections abutting end-to end, adhesively affixed to an angle iron mounting, which is removably attached to supporting structural members in the cage.

Abstract: An improved method of rapid liquid quenching of coke wherein hot coke is distributed on a surface, preferably an inclined surface, and a substantially uniform stream of quench liquid is flowed through said hot coke at spaced apart locations so that the quench liquid penetrates the depth of the bed prior to complete vaporization and percolates through the bed quenching coke as it goes. Particularly good results are obtained by oscillating the stream or streams slowly over the coke.

Abstract: A method of and apparatus for increasing yields of certain recoverable gases, particularly ethylene feedstocks, produced during the manufacture of coke from a raw material in a coking apparatus is disclosed.The method includes the steps of heating the raw material to its coking temperature to cause evolvement of the recoverable gases in an effluent zone in the coking apparatus above the raw material; and simultaneously introducing a cooling fluid into the effluent zone to maintain the temperature of the recoverable gases in the effluent zone below their decomposition temperature, thereby increasing the yield of certain recoverable gases from the coking apparatus while maintaining maximum coke-producing rates in the coking apparatus.