Abstract: An additive for metallurgical liquids is disclosed which consists of an alloy formed by admission of one or more gas phase solutes into one or more liquid phase solvents. The solvent is a substance with semiconductor characteristics, and is selected from silicon, germanium, silicon and germanium alloys with various elements for the periodic table and A.sup.III B.sup.V and A.sup.II B.sup.VI compounds where II,III,V, and VI are the respective groups in the periodic table. The solute is a low vapor pressure substance and is selected from lithium, sodium, potassium, magnesium, calcium, strontium, barium, zinc, cadmium, phosphorus, arsenic, antimony, bismuth, selenium, tellurium, bromine, and iodine in their elemental states or as oxides or salts thereof, in particular carbonates, chlorides, fluorides, or nitrides. The solvent and solute are used in by-weight ratios ranging from 10.sup.-6 % to 99%.

Abstract: An additive for metallurgic liquids is disclosed which is effective to efficiently remove slag therefrom and comprises at least one colloidal substance mainly consisting of colloidal silica. The additive may include such minerals as opal, kieselgur, tripoli, obsidians, pumices, zeolites, vermiculite or bentonites, either singly or mixed together.