is limited to a certain thickness according to the journey duration and the temperatures of the seas crossed.
* low melting loss
due to oxidation in the furnace atmosphere;
* absence of local overheating of the metal enables insignificant melting loss
of the alloying elements;
That's why within the whole mass of the melt the required temperature is maintained with the least melting loss
in comparison with different methods of arc and electron beam melting.
However, use of a portion of the reducer for diffusion deoxidizing of the final slag is inefficient and causes just increased melting loss
of silicon (Table 4).
Layers of accumulated dross will inhibit the heat transfer and further increase melting loss
as the mixed layer of metallics and oxide is converted to aluminum oxide by the high hearth temperatures.
Content of phosphorus in the molten metal practically does not change, and insignificant increase of its weight share in the metal is stipulated by melting loss
of carbon, silicon, and manganese.
A stack melter (or even a dry hearth furnace) offers the potential to remove all moisture and organic material from the charge before it can react with molten aluminum to generate oxides (melting loss
Content of carbon and active oxygen in initial metal before ladle-furnace significantly effected melting loss
of deoxidizer-elements (directly proportionally and inversely proportionally).
The cost of charge materials is virtually unaffected by overall yield because, apart from a small melting loss
, one ton of charge materials is required for every ton of good castings sold.
Such process, despite seeming simplicity of its implementation, is inefficient, especially under conditions of mass production, and first of all because of the power consumption increase, increased melting loss
of the alloy components, and accelerated wear of refractory lining;
Hopkins, ABC Coke/Div Drummond Co, Inc, described testing done on individual heats of various cupola charge materials to determine melting loss
with the resultant data, when applied, allowing the melt department to more closely control their over the spout melting costs.