A method of processing red mud comprising: heating red mud to a predetermined temperature; grinding the red mud to a predetermined particle size; and physically extracting iron components from the red mud; physically extracting aluminum components from the red mud, said physically extracting of aluminum components being separate from the physically extracting of iron components, wherein the steps of physically extracting iron components and physically extracting aluminum components are performed without requiring addition of chemical additives to the red mud.

A method of processing finely divided reactive particulates (R.sub.Particulate) and forming a product comprising: providing a composite material comprising finely divided reactive particulates (R.sub.Particulate) dispersed in a protective matrix; at least partially exposing the finely divided reactive particulates (R.sub.Particulate); and forming the product.

A method of processing finely divided reactive particulates (R.sub.Particulate) and forming a product comprising: providing a composite material comprising finely divided reactive particulates (R.sub.Particulate) dispersed in a protective matrix; at least partially exposing the finely divided reactive particulates (R.sub.Particulate); and forming the product.

A process for obtaining vanadium component in the form of vanadium oxide from gasifier slag is disclosed. The process comprises pulverizing the slag to obtain pulverized slag, which is blended with water and an alkali salt to obtain a slurry. The slurry is dried and then roasted in the presence of air to obtain a roasted slag. The roasted slag is leached to obtain a first filtrate comprising the vanadium component. The first filtrate is reacted with a magnesium salt to remove a silica component in the form of a precipitate. The silica free second filtrate is reacted with an ammonium salt to obtain ammonium metavanadate, which is further calcined to obtain the significant amount of vanadium pentoxide (V.sub.2O.sub.5).

This invention relates to a method for controlling exothermic reactions between metal chlorides of Zn, V, Cr, Co, Sn, Ag, Ta, Ni, Fe, Nb Cu, Pt, W, Pd, and Mo, and Al and the use of the method for preparation of metallic alloys and compounds based on base metals Zn, V, Cr, Co, Sn, Ag, Ta, Ni, Fe, Nb Cu, Pt, W, Pd, and Mo. The method provides for a mixture of precursor chemicals including at least one solid base metal chloride to be mixed and reacted exothermically with a control powder based on Zn, V, Cr, Co, Sn, Ag, Ta, Ni, Fe, Nb Cu, Pt, W, Pd, and Mo and then reacting the resulting intermediates with an Al scavenger. Reduction is carried out in a controlled manner to regulate reaction rates and prevent excessive rise in the temperature of the reactants and the reaction products.

The present disclosure relates to a process for recovering vanadium in the form of iron vanadate from a gasifier slag. The process comprises pulverizing the slag to obtain pulverized slag (2). The pulverized slag (2) is soaked in water (6) and an alkali salt (4) to obtain a slurry (8), followed by roasting the slurry in the presence of air to obtain roasted slag (12) which is leached (14) to obtain a first solution (18). The first solution (18) is heated at a temperature in the range of 60 C. to 80 C. while adding an iron salt (17) in an amount in the range of 10 wt % to 60 wt % at a pH in the range of 4 to 10, to obtain a second solid residue (21) which is dried to obtain iron vanadate (24).

The present disclosure relates to a process for recovering vanadium in the form of iron vanadate from a gasifier slag. The process comprises pulverizing the slag to obtain pulverized slag (2). The pulverized slag (2) is soaked in water (6) and an alkali salt (4) to obtain a slurry (8), followed by roasting the slurry in the presence of air to obtain roasted slag (12) which is leached (14) to obtain a first solution (18). The first solution (18) is heated at a temperature in the range of 60 C. to 80 C. while adding an iron salt (17) in an amount in the range of 10 wt % to 60 wt % at a pH in the range of 4 to 10, to obtain a second solid residue (21) which is dried to obtain iron vanadate (24).

The present invention is characterized by comprising: an acid leaching step for obtaining a leach liquid by causing leaching of, by means of an acid, a metal mixture at least containing vanadium and at least one type of a divalent or trivalent metal selected from nickel, cobalt, manganese, palladium, platinum, copper, and zinc; a complex generation step for adding an ammoniacal alkaline aqueous solution to the leach liquid for adjusting the pH to 10-12 and generating, in the alkaline aqueous solution, an ammine complex of a divalent or trivalent metal ion and an anion complex of a tetravalent and/or pentavalent vanadium ion; a divalent or trivalent metal recovery step for adding a carrier having a carboxyl group to the alkaline aqueous solution in which the ammine complex and the anion complex are generated, causing the divalent or trivalent metal ion in the ammine complex to be selectively adsorbed onto the carrier, and recovering the divalent or trivalent metal ion; and a vanadium recovery step for recovering vanadium from the anion complex contained in the alkaline aqueous solution after the divalent or trivalent metal ion is recovered.

The present invention is characterized by comprising: an acid leaching step for obtaining a leach liquid by causing leaching of, by means of an acid, a metal mixture at least containing vanadium and at least one type of a divalent or trivalent metal selected from nickel, cobalt, manganese, palladium, platinum, copper, and zinc; a complex generation step for adding an ammoniacal alkaline aqueous solution to the leach liquid for adjusting the pH to 10-12 and generating, in the alkaline aqueous solution, an ammine complex of a divalent or trivalent metal ion and an anion complex of a tetravalent and/or pentavalent vanadium ion; a divalent or trivalent metal recovery step for adding a carrier having a carboxyl group to the alkaline aqueous solution in which the ammine complex and the anion complex are generated, causing the divalent or trivalent metal ion in the ammine complex to be selectively adsorbed onto the carrier, and recovering the divalent or trivalent metal ion; and a vanadium recovery step for recovering vanadium from the anion complex contained in the alkaline aqueous solution after the divalent or trivalent metal ion is recovered.

A method for producing a vanadate extracts a vanadium component included in combustion fly ash or clinker. In the method, a vanadium component is recovered as a vanadate from combustion fly ash or clinker, the method including the following steps 1 to 5: (1) a step of adding an aqueous sodium hydroxide solution to combustion fly ash or clinker so that the water content is 5 to 35% by mass (step 1); (2) a step of mixing or kneading (step 2); (3) a step of heating the mixed or kneaded mixture (step 3); (4) a step of adding water to the mixture that has undergone the heating step in the step 3 to form a slurry (step 4); and (5) a step of recovering a vanadate in the aqueous phase after the solid-liquid separation of the slurry (step 5).