METHOD OF CONVERSION OF THE METALOTHERMIC SLAG Russian patent published in 2006 - IPC C22B4/06 C22B7/04 C22C33/04 

FIELD: nonferrous metallurgy; methods of conversion of the metallothermic slag.

SUBSTANCE: the invention is pertaining to the field of nonferrous metallurgy, in particular, to the metallothermic processes. The method of conversion of the metallothermic slag (4), especially of aluminothermic slag, silicothermic slag or their combinations is conducted in the process of reduction of the non-ferrous metals: V, Ni, Nb, Cr, Mo, Tt, Ti, W under action of the fluxes (5), which are added onto the surface of the metallothermic charge (2) prepared to be set on the fire before their own metallothermic reaction and-or after completion of the indicated reaction onto the surface of originated slag (4). At that there is a layer (6) of the reacted fluxes and slag. The originated layer (6) contains the fusible eutectics of the fluxes (5) and the slag. The fluxes (5) may be added onto the surface of the originated slag (4) after the metallothermic reaction within 20 minutes interval beginning from the indicated reaction completion, but predominantly within the limits of 5-10 minutes after completion of the indicated reaction. The fluxes(5) are added in the amount of 40 mass %, predominantly within the limits of 20-30 mass % in turms of the total mass of the metallothermic charge. The fluxes (5)are differ in sizes of the particles beginning from the size of the dust particle up to the maximum size of the grains of 100 mm and predominantly are within the limits of 10-30 mm. The fluxes (5) are batched on the surface of the metallothermic charge (2) and-or on the surface of the originated slag (4) simultaneously. The technical result of the invention is the change of the slag elemental composition so, that the slag is suitable for the further treatment without the losses of the metals.

EFFECT: the invention ensures the change of the slag elemental composition so, that the slag is suitable for the further treatment without the losses of the metals.

8 cl, 3 dwg, 5 ex