The peculiarities of the initial stage of interaction of an iron solid additive (1% by mass) with a copper melt in the process of induction smelting are investigated. Some characteristics influence of the additive relative to liquid copper (structure, temperature dependence of density, specific electrical resistance, magnetic permeability) at the process initial stage of its dissolution in the conditions of melting in an induction furnace with a graphite crucible with laminar movement of the melt and a uniform rise in its temperature from 1.07 to 1.29 of the copper melting temperature. As established, during the first 30 seconds of contact of the additive (armco iron cylinder weighing 8 g with a temperature of 293 K) with liquid (1448 K) copper, liquid phases appeared that did not mix with it and remained in the alloy until the end (30 min) of melting. Dissolution of Fe took place in a mixed mode, with kinetic and diffusive processes proceeding in parallel. Immediately after the contact of Fe with Cu, due to both heat transfer from the melt and the action of a high-frequency (44 kHz) electromagnetic field, a very thin (up to 5$\cdot10^{-5}$ m) surface layer of iron, which was in a ferromagnetic state, heats up sharply. Overheating the additive above the Curie point reduces the intensity of the field effect on its surface layer, but the concentrated effect of the electromagnetic field is supported by the development of electro-eddy currents directly near the surface of the additive. As found, raising the temperature of the melt to 1643 K intensified the dissolution and spread of both liquid and solid microvolumes in the alloy base and saturation of the melt with oxygen. Taking into account the obtained results, the most favourable melting temperatures are the range of 1523–1623 K when determining the optimal melt mixing intensity level. To create conditions for the formation of microemulsified, suspension or bimetallic structures, they can be implemented in ingots during the development of special technological methods.