Gfe Gesellschaft Fur Elektrometallurgie Mbh

Gfe Geselschaft Fur Elektrometallurgie Mbh

Siegfried Sattelberger

Reinhard Hahn

Hans Hess

Rudolf Fichte

Hans-Joachim Retelsdorf

Process for the recovery of vanadium from vanadium-containing source materials under the addition of additives, especially alkali metal compounds, particularly the carbonates, chlorides, sulfates as well as nitrates and/or mixtures of these compounds, whereby the source material is ground and roasted. The roasted material is leached and whereby the withdrawn leach solution is hydrometallurgically treated for the recovery of vanadium compounds. The source materials are first roasted without the addition of alkali additives and subsequently are leached in a first leaching step. To the residues of the first leaching step are added alkali additives and the mixture is roasted in a second roasting step. The roasting products are again leached.

Method of recovering vanadium from vanadium-containing materials with at

Nickel- and vanadium-containing catalysts or combustion residues from petroleum treatment are combined with alkali metal carbonates and/or chlorides and the resulting mixture is melted in the presence of a sulfur carrier with or without carbon which serves to reduce the sulfur to a sulfidic form, a high vanadium, low nickel slag segregating from a high nickel, low vanadium matte. The matte and slag can be separately tapped and the matte is treated metallurgically to recover nickel while the slag is leached and is thus treated hydrochemically to recover valuable vanadium compounds.

Method of treating nickel-containing and vanadium-containing residues

Nickel- and vanadium-containing catalysts or petroleum treatment of combustion residues are combined with alkali metal carbonates and/or chlorides and the resulting mixture is melted in the presence of a sulfur carrier with or without carbon which serves to reduce the sulfur to a sulfidic form, a high vanadium, low nickel slag seggregating from a high nickel, low vanadium matte. The matte and slag can be separately tapped and the melt is treated metallurgically to recover nickel while the slag is leached and is thus treated hydrochemically to recover valuable vanadium compounds.

A method of treating high vanadium solid petroleum residues which tend to become environmental pollutants when disposed of in landfills in which the residue is fused with sodium carbonate, sodium sulfate and/or sodium chloride and the resulting melt material is treated with an aqueous phase which can contain sodium carbonate to form a vanadate solution from which ammonium polyvanadate, sodium ammonium vanadate or ammonium metavanadate can be precipitated.

Method of producing vanadium compounds from vanadium-containing residues

A method of making cobalt-boron and/or nickel-boron alloys in a low-shaft electrical furnace wherein the burden or charge has a height of at least 500 mm and at least a portion of its carbon carrier consists of wood chips which are carbonized to wood charcoal during the process so that the wood charcoal which is produced can adsorb volatilized boron compounds and tap them so that they do not escape. The volatilized boron compounds thus tapped are carried to the reduction zone by the wood charcoal so that a high yield is obtained and the product has a low aluminum content.

Growing community of inventors

Nuremberg, Germany

Siegfried Sattelberger