(1) In this section, a process description and a simplified process flow sheet are given for each DR process to illustrate the types of equipment used and to describe the flow of materials through the plant. (2) The discussion does not mention all the variation of the flow sheet which may exist or the current status of particular plants. (3) In the majority of the DR processes described in this section, natural gas is reformed in a catalyst bed with steam or gaseous reduction products from the reduction reactor. (4) Partial oxidation processes which gasify liquid hydrocarbons, heavy residuals and coal are also discussed. (5) The reformer and partial oxidation gasifier are interchangeable for several of the DR processes.