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本专利介绍了一种从含钨物料钪回收钨、钪、铁和锰的工艺。该工艺包括在还原剂存在时,以足够的温度和充分的时间用足量的硫酸浸煮物料,以形成含大部分的钪、铁和锰的浸煮液和含大部分钨的浸煮渣。从浸煮中分离出浸煮液,并用一种有机萃取剂从溶液中萃取几乎全部的钪。这种萃取剂主要是由一种二烃基磷酸和芳香族溶剂组成。当这种萃取剂适量时就足以萃取几乎全部的钪而不萃取大量的铁和锰。从萃余液中分离含钪的有机相并用碳酸铵水溶液反萃钪,将反萃了的有机相与含钪的碳酸铵溶液分离,用碱将萃余液的pH值至少调到2左右,用电解脱除大部分的铁,再从电解液中分离出铁粉,电解后的溶液含有大量的锰。
This patent describes a process for the recovery of tungsten, scandium, iron and manganese from scandium containing tungsten. The process comprises digesting the material with sufficient sulfuric acid in the presence of a reducing agent at a sufficient temperature and for a sufficient time to form a leachate containing a major portion of scandium, iron and manganese, and a leach residue containing a major proportion of tungsten . The digestion liquor is separated from the digestion and almost all of the scandium is extracted from the solution with an organic extractant. This extractant is mainly composed of a dihydrocarbyl phosphate and an aromatic solvent. When appropriate, this extractant is sufficient to extract almost all of the scandium without extracting large amounts of iron and manganese. The scandium-containing organic phase is separated from the raffinate and the scandium is stripped with aqueous ammonium carbonate solution, the stripped organic phase is separated from the scandium-containing ammonium carbonate solution, the pH of the raffinate is adjusted to at least about 2 with alkali, Electrolytic removal of most of the iron, and then separated from the electrolyte iron powder, the solution after electrolysis contains a lot of manganese.