APPARATUS WITH HEAT EXCHANGE MEANS FOR TREATING SOLID, GRANULAR AND AGGREGATE MATERIALS

摘要

APPARATUS WITH HEAT EXCHANGE MEANS FOR TREATINGSOLID, GRANULAR AND AGGREGATE MATERIALSABSTRACT OF THE DISCLOSUREAn apparatus (14) embodying heat exchange means fortreating solid, granular and aggregate materials, and inparticular for treating spent, i.e., used, chemically bondedfoundry sand. The subject apparatus (14) includes a rotatablefirst chamber means (16) in which the used foundry sand ispreheated while traveling in a first direction there throughfrom one end thereof to the other end thereof. From the firstchamber means (16) the preheated used foundry sand is suitablyconveyed to a thermal reclaimer means (12) for purposes ofthermally removing organic matter therefrom. Thereafter, theused foundry sand is conveyed to a second chamber means (44)wherein the used foundry sand undergoes post reclamationwhereby any organic matter that may yet remain in the foundrysand is thermally removed therefrom. From the second chambermeans (44) the used foundry is made to pass into a thirdchamber means (52) which is located in surrounding heatexchange relation to the first chamber means (16). As theused foundry sand flows through the third chamber means (52)in a second direction heat is exchanged between the foundrysand traveling through the third chamber means (52) and thefoundry sand traveling through the first chamber means (16)such that the former loses heat, i.e., is being cooled and thelatter absorbs heat, i.e., is being preheated.