k fire is depicted through Fig.14.4

which is intended to last for several hours. This

type of fire is commonly useful in dealing with

large pieces, when a heat may have to be kept

for sometime. The job or work has to be turned

in all directions to ensure uniform heating of

the job. Such fire is made up around a block of

the desired size which is placed near the tuyer

nozzle and upon which coal damped with water

that is closely built into the form of a mound

or “stock”. Fine coal or pulverized coal is

suitable for use in stock fire. The block is then

withdrawn from the bed of the hearth with a

turning force to prevent the stock from being broken and a tunnel is thus formed with an

opening at the top. The fire is then lighted in the hollow space. From the bottom of the tunnel

a small amount of coal is removed and a cavity is formed in the place in to which clinker may

fall. Here the work is heated, being carefully covered with freshly coke fuel from time to time

as the fire burns away.