In addition, it contains the various impurities such as manganese, phosphorus, silicon and sulphur.The manganese makes cast-iron brittle and hard. These furnaces became the prototype of the modern cupola furnace. Flux reacts with oxides to form compounds having low melting point and lighter so that it will float on the metal pool.When charge comes through the coke bed, some amount of carbon is picked up by the metal depending on the temperature and the time when the metal is in contact with the coke. The installation and configuration of air suspension systems varies for different makes and models but the underlying principle...FRL unit Cupola melting is still recognized as the most economical melting process; most gray iron is melted by this method. CUPOLA:-It consists of a cylindrical steel shell with its interior lined with heat resisting fire bricks. Others fluxes used are dolomite, sodium carbonate, calcium carbide. Sand bed with slope towards tap hole is rammed. If What you looking for is not here, you may send a request to modify articles, Notes, and Content modification, Feedback, Suggestions here (Team will reply as early as Possible ):Air Suspension System - Diagram, Parts, Working, Types, Advantages,FRL Unit - Function, Diagram, Construction, Working, Symbol, Advantages. Besides limestone, fluorspar and soda ash are also used as flux material – The function of flux is to remove the impurities in the iron and protect the iron from oxidation.After charging the furnace fully, it is allowed to remain as such for about 1—1.5 hr. The charging door is used for feeding the charge containing metal, coke and flux, into the furnace. The melting period does not exceed 4 hours in most of the foundries. It depends upon the dimensions of cupola, the efficiency of combustion, combustion rate, constituents of charging, etc.The output of cupola can be increased by oxygen enrichment of air blast and by better heat utilization of hot outgoing gases to preheat the furnace to about 180 to 270°C. The inner side of the furnace is lined with.At first wood is ignited above the sand bed. It also does not allow smooth cooling in sand moulds. The cupola can be made almost any practical size. Opposite & above the metal tapping hole, there is a slag hole where slag is trapped.
Currently, he is working in the sheet metal industry as a designer.
The charge is preheated to about 1093°C before they settle downwards to enter the melting zone. The blast pressure varies from 250 kg/m.Air, which is needed for the combustion is blown through the tuyeres located about 36 inches (0.9 m) above the bottom of the furnace. Air springs are used in air suspension systems. It supplies the air to the wind box. The slag is also removed from top of cast-iron at regular intervals. cupola furnace diagram Operation:-First the drop door at the bottom is closed. After proper ignition, alternate layers of charge, flux & coke are fed through the charge door.
It is mainly used to convert pig iron to cast iron.
A sketch of a cupola furnace is shown in Fig. Limitations.The cupola is a most widely used foundry furnace for melting ferrous metals and alloys. Sachin is a B-TECH graduate in Mechanical Engineering from a reputed Engineering college. Total area of the tuyeres should be 1/5 to 1/6 of the cross-section area of the cupola inside the lining at tuyere level.The volume meter is installed in a cupola furnace to know the volume of air passing. A valve is provided in the blast pipe to control the flow of air. Anthracite coal or carbon briquettes may also be used.The cupola is a shaft type furnace whose height is three to five times its diameter; it is most widely used furnace for producing molten gray cast iron.
The raw materials are fed from top. Above the slag hole, there is a wind box which is connected to air blowers. If the cupola is not in use, the drop door allow for maintenance and repair work of the furnace lining. It is situated at the height of about 3 to 6 m above the tuyers.The charging platform is made of robust mild steel rods and plates. (vi) Composition of melt can be controlled. It may be as high as 30%. Cast iron tends to be brittle, except for malleable cast irons. Sometimes, it is also used for melting non-ferrous metals and alloys. A slag hole opening of about 30 to 35 mm diameter and a tap hole of about 25 mm diameter is provided.A fire of wood is ignited on the sand bottom, when the wood burns well; coke is dumped on the bed well from top. It also removes combined carbon from graphite form. Anthracite coal or carbon briquettes may also be used. A wide variety of cupola furnace for sale options are available to you, There are 7 suppliers who sells cupola furnace for sale on Alibaba.com, mainly located in Asia. The prop is removed, so that the bottom plate swings to open. It is also known as oxidizing zone.Here, the combustion actually done, consuming all the oxygen from the air blast and generates huge amount of heat.
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