METHOD OF PREPARING SEED FOR DIRECT CRYSTALLIZATION OF RED IRON OXIDE

摘要

the invention u043eu0442u043du043eu0441u0438u0442u0441u00a0 to technology u043fu0440u0438u0433u043eu0442u043eu0432u043bu0435u043du0438u00a0 fetus u0434u043bu00a0 direct crystallization of red iron oxides. the germ of the crystal deposition u0433u0435u043cu0430u0442u0438u0442u0430 receive u0433u0438u0434u0440u0430u0442u0430 nitrous iron from solution of sulphate of iron with ammonia or u0433u0438u0434u0440u043eu043eu043au0438u0441u0438 u043du0430u0442u0440u0438u00a0 b4.for 5 to 30 minutes, followed by its structures, air at 10 - 35 & deg; c with the speed of 5 to 35 g fe / l - h and thermal u0434u0435u0433u0438u0434u0440u0430u0442u0430u0446u0438u0435u0439 u043bu0435u043fu0438u0434u043eu043au0440u043eu043au0438u0442u0430. with the deposition of u0433u0438u0434u0440u0430u0442u0430 nitrous iron lead in u043fu0435u0440u0435u043cu0435u0448u0438u0432u0430u043du0438u0438 and u043fu043eu0441u0442u043eu00a0u043du043du043eu043c abundance u043eu0441u0430u0434u0438u0442u0435u043bu00a0 equal to 5 - 50% per u0441u0442u0435u0445u0438u043eu043cu0435u0442u0440u0438u044e reaction u043eu0441u0430u0436u0434u0435u043du0438u00a0.preferably the reaction mass to the stage u043eu043au0438u0441u043bu0435u043du0438u00a0 u0434u043eu0431u0430u0432u043bu00a0u044eu0442 lepidocrocite in quantities of 1 - 33% of the mass of sediment u0433u0438u0434u0440u0430u0442u0430 nitrous iron, and thermal u0434u0435u0433u0438u0434u0440u0430 u0442u0430u0446u0438u044e lead in the 120 - 200 & deg; c in air and / or in suspension in water or the water solution of sulphate u043du0430u0442u0440u0438u00a0 and / or sulphate u0430u043cu043cu043eu043du0438u00a0 and / or u043cu0430u0433u043du0438u00a0 sulfate concentration of 0.1 - 1 mol sulfate 'at 1 l at a temperature of 95 & deg; c to the point u043au0438u043fu0435u043du0438u00a0 reaction environment at normal pressure or in a solution of sulphate of iron concentration of 0.1 to 2 mol b sulphate of iron to 1 litre. u0441u043fu043eu0441u043eu0431 u043fu043eu0437u0432u043eu043bu00a0u0435u0442 u043fu043eu043bu0443u0447u0438u0442u044c u0447u0438u0441u0442u044bu0439 u043cu0438u043au0440u043eu043au0440u0438u0441u0442u0430u043bu043bu0438u0447u0435u0441u043au0438u0439 u0433u0435u043cu0430u0442u0438u0442u0435 u043eu0434u043du043eu0440u043eu0434u043du044bu043cu0438 u0438 u0437u0430u0434u0430u043du043du044bu043cu0438 u0440u0430u0437u043cu0435u0440u0430u043cu0438 u0447u0430u0441u0442u0438u0446. 4, z. s - lu.u0441u043bu0441u0441u043e "u044eu0438u0437u043eu0431u0440u0435u0442u0435u043du0438u0435 u043eu0442u043du043eu0441u0438u0442u0441u00a0 to mode u043fu0440u0438u0433u043eu0442u043eu0432u043bu0435u043du0438u00a0 u0437u0430u0440u043eu0434u044bu0449u0430 u0434u043bu00a0 direct crystallization of red iron oxides by u043eu0441u0430u0436u0434u0435u043du0438u00a0 sulphate solutions well u0435u043bu0435u0437u0430 rise and subsequent air u043eu043au0438u0441u043bu0435u043du0438u00a0 u043eu0431u0440u0430u0437u043eu0432u0430u0432u0448u0435u0433u043eu0441u00a0 sediment u0437u0430u043au0438u0441 for iron in 0 - 50 & deg; c and thermal dehydration of u043bu0435u043fu0438u0434u043eu043au0440u043eu043au0438u0442u0430 in the crystalline hematite.red iron oxide u0433u043eu0442u043eu0432u00a0u0442 by u043eu043au0438u0441u043bu0438u0442u0435u043bu044cu043du043eu0433u043e u043eu0441u0430u0436u0434u0435u043du0438u00a0 solution of sulphate of iron air co regulation of acidity reaction mixture to ph 3 - 6 base, such as ammonia, u043du0430u0442u0440u0438u00a0 hydroxide or metal iron. these processes lead to 90 - 95 & deg; c, when oxidation is at a given ph with sufficient speed.in such u0443u0441u043bu043eu0432u0438u00a0u0445 u0432u044bu0434u0435u043bu00a0u044eu0449u0430u00a0u0441u00a0 u0442u0432u0435u0440u0434u0430u00a0 phase contains in addition to the red and - ferric oxide (u0433u0435u043cu0430u0442u0438u0442u0430) as yellow and u043eu043au0441u0438u0433u0438u0434u0440u043eu043eu043au0438u0441u044c iron (u0433u0435u0442u0438u0442), presence of co