Augsta līmeņa produktu ferro hroms

Neotermisko un izotermisko metožu piemērošana tiešas samazināšanas kinētikaiFerro hromsore reveals that the direct reduction of chrome ore occurs in three stages: the initial stage, the middle stage, and the final stage, which correspond to nucleation and growth, interfacial reactions, and diffusion control, respectively. The kinetic equation for the main reaction stage in the middle stage is 1-(1- )^(1/3)=kt, Ar acīmredzamu aktivizācijas enerģiju 270 kJ/mol . gan izotermiski, gan izotermiski pētījumi par hroma rūdas tiešas samazināšanas kinētiku dod vienādus rezultātus, bet neototermiskā metode var nodrošināt visu kinētisko mehānismu un reakcijas procesa parametrus .}}}}}}}}}}}}}}}}}}}}}}}.}.}.}.}.}.}.

1.Izmantojot augstu oglekļa saturuFerro hromsalloy powder as raw material, a low-impurity chromium sulfate solution was obtained through high-temperature stirring leaching with sulfuric acid, followed by iron removal using oxalic acid. The pH of the chromium sulfate solution was then adjusted with ammonium bicarbonate to obtain chromium hydroxide precipitate. The effects of chromium ion concentration, reaction temperature, pH, and various additives on the precipitation recovery rate of chromium (III) and the filtration properties of chromium hydroxide precipitate were studied. The optimal conditions for the recovery of chromium (III) from the solution were determined through experiments: a reaction temperature of 85℃, a chromium (III) mass concentration of 10 g/L in the solution, pH=6.5, and a stirring intensity of 200 r/min. Under these conditions, the recovery rate of chromium (III) reached 99%, and the chromium hydroxide precipitate exhibited good filtration properties, with a chromium mass concentration in the filtrate reaching 0.0015 g/L, fully meeting the national discharge standards and having certain industrial praktiska vērtība.

Populāri tagi: Augsta līmeņa produktu ferro hroms, Ķīna Augsta līmeņa produktu ferro hroma ražotāji, piegādātāji, rūpnīca