1942 G. S. Witham (ed. 2) viii. 215 The Wagner Recovery Furnace..embodies an attempt to greatly increase the efficiency of heat utilization in the recovery furnace over what is possible with the traditional rotary furnace.
2004 (Nexis) 9 Sept. Almost all of the production processes, be it the paper machine, the recovery furnaces or power boilers, are strictly regulated under the Clean Air Act.