The proximal end of the ulna articulates with the trochlea of the humerus. To enable movement at the elbow joint, the ulna has a specialised structure, with bony prominences for muscle attachment. Important landmarks of the proximal ulna are the olecranon, coronoid process, trochlear notch, radial notch and the tuberosity of ulna: 1  Olecranon â A large projection of bone that extends proximally, forming part of trochlear notch. 2  Coronoid process â This ridge of bone projects outwards anteriorly, forming part of the trochlear notch.
Metallurgical coke is produced by the destructive distillation of coal in coke ovens. Prepared. coal is heated in an oxygen-free atmosphere (âcokedâ) until most volatile components in the coal are. removed. The material remaining is a carbon mass called coke. Metallurgical coke is used in iron and steel industry processes (primarily in blast furnaces) to. reduce iron ore to iron. Over 90 percent of the total coke production is dedicated to blast furnace. operations.
Coke is carbonized coal, a product produced by baking coal in a heated oven. By using a process that allows the impurities in the coal to be burned off, while not allowing the carbon content of the coal to burn, the coal is turned into coke. The impurities burned off were actually the volatile matter contained in the coal, such as tars, oils and gases. When burned, coke generated an intense amount of heat but produced very little smoke, qualities that made it an ideal fuel for use in producing iron and steal. During the 1880's, coke began to replace charcoal in the making of steel at foundries in the United States.