Search results
Results from the WOW.Com Content Network
An electric arc furnace (EAF) is a furnace that heats material by means of an electric arc. Industrial arc furnaces range in size from small units of approximately one-tonne capacity (used in foundries for producing cast iron products) up to about 400-tonne units used for secondary steelmaking. Arc furnaces used in research laboratories and by ...
The indirect arc electric furnace of the Stassano type, in its final configuration, is made from a cast iron cylindrical structure lined internally with refractory bricks. The structure is divided in two separate sections: an upper section where the electrodes are placed, and a lower crucible where the burden is loaded and fused into steel.
The Submerged-arc furnace for phosphorus production is a particular sub-type of electric arc furnace used to produce phosphorus and other products. Submerged arc furnaces are mainly used for the production of ferroalloys. The nomenclature submerged means that the furnace's electrodes are buried deep in the furnace burden.
Halcomb installed the first Héroult furnace in the US. [1] The invention of the electric arc furnace probably began when Humphry Davy discovered the carbon arc in 1800. Then in 1878 Carl Wilhelm Siemens patented, constructed and operated both direct and indirect EAFs. Commercial use still needed to wait for larger supplies of electricity and ...
Insulation is an important part of the furnace because it improves efficiency by minimizing heat escape from the heated chamber. Refractory materials such as firebrick, castable refractories and ceramic fibre, are used for insulation. The floor of the furnace are normally castable type refractories while those on the walls are nailed or glued ...
Induction furnaces do not require an arc, as in an electric arc furnace, or combustion, as in a blast furnace. As a result, the temperature of the charge (the material entered into the furnace for heating, not to be confused with electric charge) is no higher than required to melt it; this can prevent the loss of valuable alloying elements. [5]
The process begins with a downdraft sintering operation. The sinter, which is a mixture of roaster calcine and EAF (electric arc furnace) calcine, is loaded onto a gate type conveyor and then combustions gases are pumped through the sinter. The carbon in the combustion gases react with some impurities, such as lead, cadmium, and halides.
1941 electric arc furnace During the 1990s, Crucible expanded its operations to Canada, working with General Motors , and building a 35,000-square-foot (3,300 m 2 ) facility with newly patented smelting and processing equipment costing $25 million.