Abstract: An apparatus is disclosed for a split spray-cooled roof for a tilting metallurgical furnace. The split spray-cooled roof has a center, a first hollow metal roof section and a second hollow metal roof section. The first and second hollow roof sections are attached together along a prescription split line. The prescription split line having a first split line and a second split line, wherein the first split line is not aligned with the second split line and wherein the first and second split line are not aligned with the center.

Abstract: One embodiment is a cooling system for regulating temperature of a surface of a metallurgical furnace. The cooling system includes a plurality of spray conduits. Each spray conduit has one or more control valves and has a plurality of nozzles. A plurality of temperature sensors are disposed proximate the surface of the metallurgical furnace. A control system adjusts the control valves of the plurality of spray conduits in response to temperature information derived from the plurality of temperature sensors.

Abstract: In response to a request to access a database, a decision is made that a secondary data structure associated with the database needs rebuilding. A reason why the secondary data structure needs rebuilding is determined and the reason is presented via a user interface. In various embodiments, other information may also be presented, such as an identification of the operation associated with the request that encountered the secondary data structure and an identification of a most recent query that used the secondary data structure. In this way, the user may be informed of the reason why a secondary data structure needs rebuilding, so that the user may opt to take action to prevent secondary data structures from needing rebuilding in the future, and thus avoid the expense and time of rebuilding the secondary data structures.