Condensate sand collection system

Claim 1

In combination with a furnace, the furnace having an output conduit with a generally cylindrical output end and a furnace-connected end, a sand collection system for recovering sublimate products from volatile gases produced by the furnace, comprising: said furnace having a hot zone and producing volatile gases having gaseous sublimate products therein; a generally cylindrical hollow container having open opposite first and second ends; means on said container for removably mounting said container at least partially within said furnace conduit; said container having an outside diameter approximately equal to the inside diameter of said conduit, and adapted to form a tight, slidable fit between said container and said conduit; seal means mounted between the exterior wall of said container and the interior wall of said furnace conduit, adapted to form an airtight seal between said container and said conduit; said container being filled with removable coarse particulate material; said container being positioned with said conduit a distance from the hot zone of said furnace such that the volatile gases from said furnace will condense on the surfaces of said particulate material and leave sublimate products on said particulate material; a fluid-permeable material removably mounted in said first end of said container and adapted to hold said particulate material within said container; and a wall in said second end of said container having a restricted opening therein for holding said particulate material within said container, and adapted to allow the flow of fluid therethrough.