Method for producing metal or metal compound comprising process of treating with fluorine and adjusted raw material used therein

A method of producing tantalum, niobium, or a similar substance from an ingredient-regulated metal-containing raw material obtained by mixing an ore or a concentrate containing at least one of tantalum and niobium and a radioactive substance,

• the method comprising a fluoridation process and collection and refinement of tantalum, niobium, or a similar substance from the extract,
• the fluoridation process including treating the ingredient-regulated raw material with hydrofluoric acid or a mixed acid containing, as an essential component, hydrofluoric acid, and separating the resultant mixture into an extract into which a metallic component is eluted and an extraction residue,
• wherein the employed ingredient-regulating raw material comprises the ore or the concentrate containing a radioactive substance and, as an additive, a substance insoluble to hydrofluoric acid or to a mixed acid containing, as an essential component, hydrofluoric acid, to thereby control to an arbitrary value of 1.0 wt. % or less the ratio of the total amount of radioactive substance, U3O8 and ThO2, remaining in the extraction residue generated through the fluoridation process to the weight of the extraction residue.

A method of producing a metal or a metal compound from metal-containing ore or a metal-containing concentrate containing a radioactive substance,

• the method comprising a fluoridation process and collection and refinement of the metallic component from the extract,
• the fluoridation process including treating said ingredient-regulated raw material with hydrofluoric acid or a mixed acid containing hydrofluoric acid as an essential component, and separating the resultant mixture into an extract into which a metallic component is eluted and an extraction residue,
• wherein the ore or the concentrate containing a radioactive substance is employed as a raw material, and a substance insoluble to hydrofluoric acid or to a mixed acid containing hydrofluoric acid as an essential component employed in a fluoridation process is added during said fluoridation process, to thereby control to an arbitrary value of 1.0 wt. % or less the ratio of the amount of radioactive substance remaining in the extraction residue generated through the fluoridation process to the weight of the extraction residue.

A method of producing tantalum, niobium, or a similar substance from an ore or a concentrate containing at least one of tantalum and niobium and a radioactive substance,

• the method comprising a fluoridation process and collection and refinement of the metallic component from the extract,
• the fluoridation process including treating said ore or concentrate with hydrofluoric acid or a mixed acid containing hydrofluoric acid as an essential component, and separating the resultant mixture into an extract into which a metallic component is eluted and an extraction residue,
• wherein the ore or the concentrate containing at least one of tantalum and niobium and a radioactive substance is employed as a raw material, and a substance insoluble to hydrofluoric acid or to a mixed acid containing hydrofluoric acid as an essential component employed in a fluoridation process is added during said fluoridation process, to thereby control to an arbitrary value of 1.0 wt. % or less the ratio of the amount of radioactive substances, U3O8 and ThO2, remaining in the extraction residue generated through the fluoridation process to the weight of the extraction residue.