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- W2316182235 abstract "One step and two step treatments with Na2B2O4, Na2B407 and Na2B6O10 fluxes for the production of purified hematite from iron oxide produced in the residue treatment process to precipitate iron (abbreviated as IR-oxide) and various iron ores have been investigated by use of the recrystallization method.And, the effects of the iron ore/flux ratio, the sort of fluxes and the number of treatment on the removal of impurities in iron ores and the yield of hematite crystal were tested.The main results obtained are as follows:(1) The concentrations of Si, Al, Mn, Mg, Ca and V elements decreased with the flux treatment regardless of sort of ores. But the degree of Mn removal was low, and Ti was not removed.(2) Two step flux treatment of iron ores was more effective than one step, except for removal of As, S, Si and Ti.(3) On removal of impurities in iron oxides, Na2B407 and Na2B6010 flux are superior to Na2B2O4, and Na2B407 is suitable for the removal of Si, Al, As and S, while Na2B6010 for the Mn, Mg and Ca removal.(4) Mixing amount of 35 mass% iron ore gave the better removal. rate of impurities by the flux treatment than that of 45 mass%, whereas the better yield of hematite crystals was obtained in the case of 45 mass%." @default.
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- W2316182235 date "1994-01-01" @default.
- W2316182235 modified "2023-09-26" @default.
- W2316182235 title "Production of purified hematite from iron ores by Na2O-B2O3 system flux fusion method-II. Production of Purified Hematite from Various Iron Ores." @default.
- W2316182235 doi "https://doi.org/10.2473/shigentosozai.110.227" @default.
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