Pit furnace is a type of a furnace bath which is installed in the form of a pit and is used for melting small quantities of ferrous and non ferrous metals for production of castings. It is provided with refractory inside and chimney at the top. Generally coke is used as fuel. It is provided with refractory lining inside and chimney at the top. Natural and artificial draught can be used for increasing the capability towards smooth operation of the furnace. Fig. 6.6 shows the typical pit furnace.