Influence of the Power of Various Types of Induction Furnaces on the Shape of the Metal Bath Surface

Abstract

The work shows the results of examinations conducted to ascertain the influence of the working power of a vacuum induction crucible furnace (ICF) and a furnace with a cold crucible (CCF), on the surface area of liquid Al-Zn alloy molten within these devices. It was determined that the increase of the value of this parameter causes the increase of the liquid alloys surface area. In the case of smelting alloy inside a crucible furnace the increase of power from 8 to 22 kW causes the increase of liquid alloy surface from 88 to 155 cm 2 . For a furnace with a cold crucible, the power increase from 70 to 130 kW causes the increase of the alloy surface from 280 to 330.3 cm 2 . For all power values a larger increase in surface area was observed in crucible furnaces (around two times). In cases of cold crucible furnaces, this increase was around 20%. Additionally, based on the examination results the way in which the surface area of liquid alloy can intensify the undesirable process of zinc fuming away, was discussed. It has been demonstrated that the process of zinc elimination from the examined alloy is more intensive while using a cold crucible induction furnace.

Electromagnetic processing of molten copper alloys in the induction furnace with cold crucible

“…Figure 4 shows a picture at the surface of the investigated alloy during its melting in the ICCF furnace. In order to estimate the current surface area of the liquid Cu-Pb alloy, the method described in [19] is used. It consists of the following steps:…”

Archives of Foundry Engineering

“…In the case of melting metal alloys in induction furnaces, we are dealing with an increase in the surface of the alloy through the formation of the so-called meniscus. For this reason, the method described in detail in [8] was used to determine the actual surface of the liquid Al-Zn alloy. This method allows you to estimate the size of the surface with the program Wolfram Mathematica.…”

“…shows the change of the k e Zn coefficient in the temperature range 953-1113 K determined from the equation(8).…”