The schematic of the modified retort is shown in Fig. 1. The
existing static retort (E) was retrofitted to include a reciprocating
cage assembly comprising of a cage (A) reciprocating on horizontal
rails (B), by the aid of slip rings (C), as shown in Fig. 1c. The steel
rails (B) were welded to the interior of the steam retort (E). The slip
rings (C) were made from Nylon material