Heat Tech is regularly called upon to provide temporary heat for furnaces, or part of the plant utilising our portable high velocity gas burners. In circumstances where a gas supply is not available or gas is not the preferred fuel source, Heat Tech’s portable diesel burners are an equally dependable option to supplement heat.
If a furnace needs to shutdown for a considerable amount of time (E.g. Auxiliary plants are shutdown, Steam outage, Etc) but molten metal tap out is not required, it is critical to maintain heat inside the furnace to ensure the following;
• Ensure that the furnace structure is protected from sudden temperature change.
• Unless rebricking the furnace, refractory should be kept close to operating temperature.
Refractory is prone to fail when cooled down to ambient and rapidly returned to process
• To minimise molten metal build up at the bottom of the furnace. Build up at the bottom of the furnace will cause problems during feed resumption. One of the usual issues is that furnace space will not be fully utilised due to the build up and also causes a problem in maintaining target matte/blister grade when build up slowly melts.
Examples of hot-hold services Heat Tech have conducted: Flash Furnace and Electric furnace hot- hold during Steam outage, Anode furnace hot-hold using diesel burners during gas outage, Coke oven regenerator hot-hold during through wall repair, and many more.