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Friday, 7 February 2014

Cupola Furnace and its Construction

Cupola Furnace and its Construction Points : Cupola Furnace, Explain Cupola Furnace, What construction and working of cupola furnace Cupola Furnace correctly intended and function is mainly efficient furnace for melt iron. Cupola furnace is also use for the making of modular and pliable cast iron. Various copper-base alloys preserve too be melted in a cupola if alloying fundamentals similar to zinc and tin do not go below extreme oxidation. Wide use of cupola is suitable to the following cause. Cupola is an obstinate ruled vertical cylinder, open at equally its top and bottom. Outer shell is prepared by welding or fascinating steel plates. The base of the shell is generally drop-bottom type prepared by joining the two-hinged semi-circular plates support by a leg. At the finish of melt, for release the debris as of the furnace, this base can be simply dropped pulling gone the supporting leg. In start of a dissolve a sand base is first rammed ahead the drop-bottom. Various cokes are after that placed on the sand base and fire is lit. Charge of pig iron, scrap, flux and fuel are begin during the charge exit and are placed on the flaming coke in every other layer. Fire already lit in the base coke passes up during these layers.
  1. Cupola furnace is inexpensive to function and it sustain high effectiveness of melting as of the counter flow preheating with close contact among metal and fuel resulting in the admirable heat-transfer characteristics through the melting process.
  2. Cupola furnace is presented in good-number of unstable sizes. It is simple to control and is one between the best melting furnaces.
  3. Cupola furnace is the only furnace by which metal can be tapped constantly.
Construction of Cupola Furnace This furnace is basically a firebrick lined plumb container. Shell or external covering is prepared of steel plate concerning 5 toward 8mm wide and inside case a refractory coating of firebrick is prepared. Approximately bottom of shell a wind-box totally surround cupola. Function of the wind, boxes to provide air regularly to all the tuyeres. As of the wind-box notch name tuyeres widen during the shell and, obstinate lining in to melt part. Four big cast iron legs generally hold up a cupola. Two hinged falcate doors close up to form the base. After all warmth a support is by go down allowing the door to open descending and lasting iron, coke and debris. Blower during blast-pip to storm supplies the air blast, which aids burning of coke box. Melt metal will flow out of tap hole downward spew out at the front of the cupola with from there in to a ladle one more hole call the slag hole is placed at the side of the cupola now below the tuyeres. It allocates the glut slag, which drift on top of molten iron to be impassive. Taking place the outside of wind-box straight at the back all tuyeres, is a small hole call a sight hole during which cupola operative be able to partly perceive condition of coke and iron in the cupola. Charging door during which the charges of iron with coke go in is situated in the side of the cupola a sure reserve over the tuyeres. Charging exit is generally placed at the charging floor, which is one story over the major base.

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