A process for recovering zinc from a zinc containing material, the process including the steps of: leaching the zinc containing material with an alkaline lixiviant comprising an aqueous mixture of NH.sub.3 and NH.sub.4Cl, or ionic equivalent, having a NH.sub.4Cl concentration of between about 10 g/L and about 150 g/L H.sub.2O and a NH.sub.3 concentration of between 20 g/l H.sub.2O and 250 g/L H.sub.2O, to produce a zinc containing leachate; stripping ammonia from the leachate to produce a stripped liquor which includes a zinc containing precipitate, the stripped liquor having a NH.sub.3 concentration of between 7 and 30 g/L H.sub.2O; and recovering the zinc from the stripped liquor.

A process for recovering zinc from a zinc containing material, the process including the steps of: leaching the zinc containing material with an alkaline lixiviant comprising an aqueous mixture of NH.sub.3 and NH.sub.4Cl, or ionic equivalent, having a NH.sub.4Cl concentration of between about 10 g/L and about 150 g/L H.sub.2O and a NH.sub.3 concentration of between 20 g/l H.sub.2O and 250 g/L H.sub.2O, to produce a zinc containing leachate; stripping ammonia from the leachate to produce a stripped liquor which includes a zinc containing precipitate, the stripped liquor having a NH.sub.3 concentration of between 7 and 30 g/L H.sub.2O; and recovering the zinc from the stripped liquor.

An object of the present invention is to recover a minor metal and/or rare-earth metal.

The present invention provides a method for recovering a minor metal and/or rare-earth metal from a post-chlorination residue in titanium smelting.

The minor metal and/or rare-earth metal is one or more metal selected from the group consisting of Sc, V, Nb, Zr, Y, La, Ce, Pr, and Nd.

This method for producing a vanadium compound has an alkaline leaching step for immersing incineration ash in an alkaline solution to cause vanadium to leach from the incineration ash into the alkaline solution and obtain a leachate slurry, a solid-liquid separation step for separating the leachate slurry obtained in the alkaline leaching step into a solid and liquid followed by removing insoluble matter to obtain a leachate, a pH adjustment step for adding acid to the leachate following solid-liquid separation to make the leachate acidic, an aging step for aging the leachate following pH adjustment until a precipitate forms in the leachate, and a separation step for separating the precipitate from the leachate following the aging step.

This method for producing a vanadium compound has an alkaline leaching step for immersing incineration ash in an alkaline solution to cause vanadium to leach from the incineration ash into the alkaline solution and obtain a leachate slurry, a solid-liquid separation step for separating the leachate slurry obtained in the alkaline leaching step into a solid and liquid followed by removing insoluble matter to obtain a leachate, a pH adjustment step for adding acid to the leachate following solid-liquid separation to make the leachate acidic, an aging step for aging the leachate following pH adjustment until a precipitate forms in the leachate, and a separation step for separating the precipitate from the leachate following the aging step.

A method of introducing carbon to an Electric Arc Furnace (EAF) used for melting steel, and a composition of matter including carbon, and made in a briquette form. The composition comprises between 45 and 96 weight percent of a carbon-containing material, between 2 and 30 weight percent of a basic oxide, and between 2 and 25 weight percent of a binder material. The method comprises mixing between 45 and 96 weight percent of a carbon-containing material, between 2 and 30 weight percent of a basic oxide, and between 2 and 25 weight percent of a binder material to form a solid material mixture; compressing individual portions of the solid material mixture into compressed briquettes; curing the compressed briquettes into solid briquettes; and adding the solid briquettes into the molten steel in the electric arc steelmaking furnace.

A method of introducing carbon to an Electric Arc Furnace (EAF) used for melting steel, and a composition of matter including carbon, and made in a briquette form. The composition comprises between 45 and 96 weight percent of a carbon-containing material, between 2 and 30 weight percent of a basic oxide, and between 2 and 25 weight percent of a binder material. The method comprises mixing between 45 and 96 weight percent of a carbon-containing material, between 2 and 30 weight percent of a basic oxide, and between 2 and 25 weight percent of a binder material to form a solid material mixture; compressing individual portions of the solid material mixture into compressed briquettes; curing the compressed briquettes into solid briquettes; and adding the solid briquettes into the molten steel in the electric arc steelmaking furnace.

Various embodiments include a system or platform that uses electrochemistry to upcycle waste products and low-value minerals into valuable, carbon dioxide (CO.sub.2)-neutral materials. Various embodiments may include systems and/or methods for processing material inputs using an electrochemical reactor. Various embodiments may include systems, methods, and/or devices for capturing and sequestering carbon dioxide (CO.sub.2) while producing valuable co-products.

The processes can comprise feeding a furnace with a raw material. These materials can contain impurities and valuable metals (base metals, precious metals, platinum group metals, minor metals). The processes can allow the volatilization of arsenic and indium contained therein. Before volatilizing the material, composition of the material is optionally modified so as to obtain a ratio % S/(% (Cu/2)+% Ni+% Co) of about 0.5 to about 2. The processes can comprise feeding a melting device with the depleted material, and with a source of carbon in order to obtain a multi-layer product and an off gas. Before melting the depleted material, the depleted material composition is optionally modified so as to obtain a ratio % S/(% (Cu/2)+% Ni+% Co) of about 0.5 to about 2. Thus, it is possible to recover Cu, Ni and Co as well as several other metals, including In, Ge, Pb, Bi, precious metals and platinum group metals.

The processes can comprise feeding a furnace with a raw material. These materials can contain impurities and valuable metals (base metals, precious metals, platinum group metals, minor metals). The processes can allow the volatilization of arsenic and indium contained therein. Before volatilizing the material, composition of the material is optionally modified so as to obtain a ratio % S/(% (Cu/2)+% Ni+% Co) of about 0.5 to about 2. The processes can comprise feeding a melting device with the depleted material, and with a source of carbon in order to obtain a multi-layer product and an off gas. Before melting the depleted material, the depleted material composition is optionally modified so as to obtain a ratio % S/(% (Cu/2)+% Ni+% Co) of about 0.5 to about 2. Thus, it is possible to recover Cu, Ni and Co as well as several other metals, including In, Ge, Pb, Bi, precious metals and platinum group metals.