NEW ORE ROASTING FURNACE. At the feed end of the furnace in rear of the fire box F on a supporting frame is a blower delivering air into an air receptacle from which an air pipe is extended through the flue at the end of the cylinder A and centrally through the cylinder nearly the whole length thereof. This pipe is plugged at its inner end and is provided with many lateral openings for the escape of air. It is surrounded by a fire clay pipe or jacket larger than itself so that an annular space is left between the two pipes for heating the air; and the pipe or jacket is constructed in sections

- Image ID: 2ABWRJ8
NEW ORE ROASTING FURNACE. At the feed end of the furnace in rear of the fire box F on a supporting frame is a blower delivering air into an air receptacle from which an air pipe is extended through the flue at the end of the cylinder A and centrally through the cylinder nearly the whole length thereof. This pipe is plugged at its inner end and is provided with many lateral openings for the escape of air. It is surrounded by a fire clay pipe or jacket larger than itself so that an annular space is left between the two pipes for heating the air; and the pipe or jacket is constructed in sections
Penta Springs LLP / Alamy Stock Photo
Image ID: 2ABWRJ8
NEW ORE ROASTING FURNACE. At the feed end of the furnace in rear of the fire box F on a supporting frame is a blower delivering air into an air receptacle from which an air pipe is extended through the flue at the end of the cylinder A and centrally through the cylinder nearly the whole length thereof. This pipe is plugged at its inner end and is provided with many lateral openings for the escape of air. It is surrounded by a fire clay pipe or jacket larger than itself so that an annular space is left between the two pipes for heating the air; and the pipe or jacket is constructed in sections with spaces be tween their ends for the escape of air into the cylinder A; and sections are held in place by spiders that radiate to the inner surface of the cylinder A and are there fastened. The inner end of the fire clay pipe is also closed against the escape of air. Another air pipe enters the opposite end of the furnace and extends to an air receptacle L in rear of the dust collecting chamber and from thence a pipe extends horizontally through the fire box and chamber G into the pipe M which carries the products of combustion from the fire box and which is surrounded for some distance by the flue H and cylinder C and terminates in a cross pipe that is open at both ends and projects in opposite directions through the pipe M and flue H discharging air into the cylinder C. This air pipe is held in place by an encircling spider. Over the fire box F is a feed hopper N from which the ore to be fed into the furnace A B C falls into a trough whence it is conveyed by a screw into a conductor which directs it into the end of cylinder A as indicated Through the wall of the dust collecting chamber G at the top is in troduced a horizontal shaft having on its inner end a pro peller fan which is located above the fire box G where the two chambers communicate with each other. This fan creates a draught through the furnace A B C to the smoke stack. By means of the salt and chemical box at